[ { "key": "P237WKMX", "version": 25, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/P237WKMX", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/P237WKMX", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "parsedDate": "1972", "numChildren": 0 }, "data": { "key": "P237WKMX", "version": 25, "itemType": "journalArticle", "title": "The uniflow steam expander-its relation to efficiency of the SE-101 powerplant", "creators": [], "abstractNote": "Of the many types of expanders that might be used with the Rankine cycle, a reciprocating unit of uniflow configuration, having a fixed cutoff ratio, was chosen for evaluation in the SE-101 steam-powered automobile. In this study the major losses associated with such an expander, which are not considered in the theoretical Rankine cycle, are reviewed. Using a mathematical model of the expander, the magnitude and distribution of these losses is estimated. The relationship of expander efficiency to the efficiencies of other components of the powerplant is examined. Considering the efficiency realized in the expander, it is evident that previously reported excessive exhaust emissions from the SE-101 installation cannot be reduced to acceptable levels by improvements to the expander alone.", "publicationTitle": "Proceedings of the 7th Intersociety Energy conversion Engineering conference", "publisher": "", "place": "", "date": "1972", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "960-705", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "INSPEC:474532", "tags": [], "collections": [], "relations": {}, "dateAdded": "2014-01-07T18:04:14Z", "dateModified": "2014-01-07T18:04:14Z" } }, { "key": "4AIP63UH", "version": 24, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/4AIP63UH", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/4AIP63UH", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "parsedDate": "1977", "numChildren": 0 }, "data": { "key": "4AIP63UH", "version": 24, "itemType": "journalArticle", "title": "The helical screw expander evaluation project", "creators": [], "abstractNote": "A positive-displacement helical-screw expander of the Lysholm type has been adapted for geothermal service and successfully demonstrated in a", "publicationTitle": "Proceedings of the 12th Intersociety Energy Conversion Engineering Conference", "publisher": "", "place": "", "date": "1977", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "899-903", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "INSPEC:1145371", "tags": [], "collections": [], "relations": {}, "dateAdded": "2014-01-07T18:03:54Z", "dateModified": "2014-01-07T18:03:54Z" } }, { "key": "C2EQUZEE", "version": 23, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/C2EQUZEE", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/C2EQUZEE", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "parsedDate": "1983", "numChildren": 0 }, "data": { "key": "C2EQUZEE", "version": 23, "itemType": "journalArticle", "title": "The empirical modeling of a Lysholm Screw Expander", "creators": [], "abstractNote": "An engine model is developed for the prediction of mass flow rate, power, efficiency and exhaust quality for a Lysholm Screw Expander at a given set of operating conditions. An expander having a rotor diameter of 130 mm (5.12 in.) and an expansion ratio of 5.3 was tested with simulated geothermal fluid at an inlet pressure of 0.827 MPa (120 psia). The inlet quality, engine speed and pressure ratio were independently varied to produce a three-dimensional data matrix of 104 data points. Statistical curve fitting methods were adapted to produce equations for mass flow rate and power output in terms of the three variables associated with the data matrix. These explicit equations were combined with a numerical steam table subroutine to produce an engine model. The predictive ability observed during the validation of the model is adequate for use in system modeling for systems such as a hybrid geothermal energy conversion system.", "publicationTitle": "Proceedings of the 18th Intersociety Energy Conversion Engineering Conference", "publisher": "", "place": "", "date": "1983", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "286-93 vol.1", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "INSPEC:2276171", "tags": [], "collections": [], "relations": {}, "dateAdded": "2014-01-07T17:53:44Z", "dateModified": "2014-01-07T17:53:44Z" } }, { "key": "TPMBVCG5", "version": 22, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/TPMBVCG5", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/TPMBVCG5", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Au et al.", "parsedDate": "2003-07-15", "numChildren": 0 }, "data": { "key": "TPMBVCG5", "version": 22, "itemType": "journalArticle", "title": "The influence of operating temperature on the efficiency of a combined heat and power fuel cell plant", "creators": [ { "creatorType": "author", "firstName": "S. F.", "lastName": "Au" }, { "creatorType": "author", "firstName": "S. J.", "lastName": "McPhail" }, { "creatorType": "author", "firstName": "N.", "lastName": "Woudstra" }, { "creatorType": "author", "firstName": "K.", "lastName": "Hemmes" } ], "abstractNote": "It is generally accepted that the ideal operating temperature of a molten carbonate fuel cell (MCFC) is 650 degreesC. Nevertheless, when waste heat utilization in the form of an expander and steam production cycle is introduced in the system, another temperature level might prove more productive. This article is a first attempt to the optimization of MCFC operating temperatures of a MCFC system by presenting a case study in which the efficiency of a combined beat and power (CHP) plant is analyzed. The fuel cell plant under investigation is designed around a 250kW-class MCFC fuelled by natural gas, which is externally reformed by a heat exchange reformer (HER). The operating temperature of the MCFC is varied over a temperature range between 600 and 700 degreesC while keeping the rest of the system the same as far as possible. Changes in energetic efficiency are given and the causes of these changes are further analyzed. Furthermore, the exergetic efficiencies of the system and the distribution of exergy losses in the system are given. Flowsbeet calculations show that there is little dependency on the temperature in the first order. Both the net electrical performance and the overall exergetic performance show a maximum at approximately 675degreesC, with an electrical efficiency of 51.9% (LHV), and an exergy efficiency of 58.7%. The overall thermal efficiency of this CHP plant increases from 87.1% at 600 degreesC to 88.9% at 700 degreesC. Overall, the change in performance is small in this typical range of MCFC operating temperature. (C) 2003 Elsevier Science B.V. All rights reserved.", "publicationTitle": "Journal of Power Sources", "publisher": "", "place": "", "date": "JUL 15 2003", "volume": "122", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "37-46", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "J. Power Sources", "DOI": "10.1016/S0378-7753(03)00345-8", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0378-7753", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000184200900005", "tags": [ { "tag": "design", "type": 1 }, { "tag": "flowsheet", "type": 1 }, { "tag": "fuel cell", "type": 1 }, { "tag": "mcfc", "type": 1 }, { "tag": "modeling", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2014-01-07T17:11:11Z", "dateModified": "2014-01-07T17:11:11Z" } }, { "key": "TXNIR9AE", "version": 21, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/TXNIR9AE", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/TXNIR9AE", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "DiPippo", "parsedDate": "2007-06", "numChildren": 0 }, "data": { "key": "TXNIR9AE", "version": 21, "itemType": "journalArticle", "title": "Ideal thermal efficiency for geothermal binary plants", "creators": [ { "creatorType": "author", "firstName": "Ronald", "lastName": "DiPippo" } ], "abstractNote": "The Carnot cycle is reviewed as to its appropriateness to serve as the ideal model for geothermal binary power plants. It is shown that the Camot cycle sets an unrealistically high upper limit on the thermal efficiency of these plants. A more useful. model is the triangular (or trilateral) cycle because binary plants operating on geothermal hot water use a non-isothernal heat source. The triangular cycle imposes a lower upper bound on the thermal efficiency and serves as a more meaningful ideal cycle against which to measure the performance of real binary cycles. Camot and triangular cycle efficiencies are contrasted and the thermal efficiencies of several actual binary cycles are weighed against those of the ideal triangular cycle to determine their relative efficiencies. It is found that actual binary plants can achieve relative efficiencies as high as 85%. The paper briefly discusses cycles using two-phase expanders that in principle come close to the ideal triangular cycle. (c) 2007 CNR. Published by Elsevier Ltd. All rights reserved.", "publicationTitle": "Geothermics", "publisher": "", "place": "", "date": "JUN 2007", "volume": "36", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "276-285", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Geothermics", "DOI": "10.1016/j.geothermics.2007.03.002", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0375-6505", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000247352000006", "tags": [ { "tag": "Carnot efficiency", "type": 1 }, { "tag": "Thermal efficiency", "type": 1 }, { "tag": "binary power plant", "type": 1 }, { "tag": "geothermal power plant", "type": 1 }, { "tag": "power", "type": 1 }, { "tag": "triangular cycle", "type": 1 }, { "tag": "trilateral cycle", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2014-01-07T16:15:00Z", "dateModified": "2014-01-07T16:15:00Z" } }, { "key": "XDN6WXV2", "version": 20, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/XDN6WXV2", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/XDN6WXV2", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "parsedDate": "2008-03", "numChildren": 0 }, "data": { "key": "XDN6WXV2", "version": 20, "itemType": "journalArticle", "title": "Development and model analysis of an expander for transcritical CO 2 system", "creators": [], "abstractNote": "In order to improve the efficiency of the transcritical CO 2 system, a new two-cylinder rolling piston expander without inlet control valve was proposed. By developing a mathematical model of this kind of expander, the expansion process of CO 2 refrigerant inside the expander and the forces acting on main components were analyzed, which provides important guidance for the further development of this kind of expander.", "publicationTitle": "Journal of Shanghai Jiaotong University", "publisher": "", "place": "", "date": "2008 March", "volume": "42", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "453-456", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "J. Shanghai Jiaotong Univ. (China)", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "Chinese", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "INSPEC:10326978", "tags": [], "collections": [], "relations": {}, "dateAdded": "2014-01-07T16:14:02Z", "dateModified": "2014-01-07T16:14:02Z" } }, { "key": "NXP9U7QM", "version": 19, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/NXP9U7QM", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/NXP9U7QM", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "parsedDate": "2009-06", "numChildren": 0 }, "data": { "key": "NXP9U7QM", "version": 19, "itemType": "journalArticle", "title": "Numerical evaluation on the performance of advanced CO 2 cycles in the cooling mode operation", "creators": [], "abstractNote": "A cycle simulation model was developed to predict the performances of the basic and advanced CO 2 cycles. The simulation model for the basic", "publicationTitle": "Applied Thermal Engineering", "publisher": "", "place": "", "date": "2009 June", "volume": "29", "issue": "8-9", "section": "", "partNumber": "", "partTitle": "", "pages": "1485-1492", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Appl. Therm. Eng. (UK)", "DOI": "10.1016/j.applthermaleng.2008.06.030", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "INSPEC:10754149", "tags": [], "collections": [], "relations": {}, "dateAdded": "2014-01-06T23:20:54Z", "dateModified": "2014-01-06T23:20:54Z" } }, { "key": "PFFA4FM6", "version": 18, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/PFFA4FM6", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/PFFA4FM6", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "parsedDate": "2009-07", "numChildren": 0 }, "data": { "key": "PFFA4FM6", "version": 18, "itemType": "journalArticle", "title": "Simulation of scroll expander used in low-temperature waste heat recovery system", "creators": [], "abstractNote": "A mathematic model of the scroll expander in the low-temperature waste heat recovery system using R123 as working fluid was established and the effects of suction and discharge, leakage, and heat transfer on its working process were analyzed. The results show that the actual process is different from the theoretic one because of the pressure loss in the suction and discharge processes and the leakage and heat transfer in the entire process. The working fluid mass in the expansion chamber is less than the theoretic value after the suction process, and it decreases at the beginning of expansion and then increases. The actual delivery and power output increase but their increments decrease with the increase of the rotational speed. The volumetric efficiency increases with the rotational speed. In addition, the volumetric efficiency may be enhanced by reducing the radial clearance and axial clearance.", "publicationTitle": "Journal of Xi'an Jiaotong University", "publisher": "", "place": "", "date": "2009 July", "volume": "43", "issue": "7", "section": "", "partNumber": "", "partTitle": "", "pages": "88-91", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "J. Xi'an Jiaotong Univ. (China)", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "Chinese", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "INSPEC:11248199", "tags": [], "collections": [], "relations": {}, "dateAdded": "2013-12-23T22:46:41Z", "dateModified": "2013-12-23T22:46:41Z" } }, { "key": "7U8P72VX", "version": 17, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/7U8P72VX", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/7U8P72VX", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Matsui et al.", "parsedDate": "2009-07", "numChildren": 0 }, "data": { "key": "7U8P72VX", "version": 17, "itemType": "journalArticle", "title": "Development of the High-Efficiency Technology of a CO2 Two-Stage Rotary Expander", "creators": [ { "creatorType": "author", "firstName": "Masaru", "lastName": "Matsui" }, { "creatorType": "author", "firstName": "Hiroshi", "lastName": "Hasegawa" }, { "creatorType": "author", "firstName": "Takeshi", "lastName": "Ogata" }, { "creatorType": "author", "firstName": "Masanobu", "lastName": "Wada" } ], "abstractNote": "To improve the coefficient of performance of a heat pump cycle by using carbon dioxide, an expander was developed that recovers rotation power from the large pressure difference in the cycle and uses the power to partially drive the cycle. In the cycle, a two-stage rotary expander was adopted, because the suction control mechanism is not necessary in it. A performance analysis model was developed by combining the dynamic mechanical analysis and the refrigerant pressure analysis in the expander and taking refrigerant leakage into consideration. After examining the impact of each design parameter on the performance of the two-stage rotary expander, an optimized design was determined. With this design, an expander efficiency of 54% could be achieved in a short period of time.", "publicationTitle": "Hvac&r Research", "publisher": "", "place": "", "date": "JUL 2009", "volume": "15", "issue": "4", "section": "", "partNumber": "", "partTitle": "", "pages": "743-758", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "HVAC&R Res.", "DOI": "10.1080/10789669.2009.10390861", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "1078-9669", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000272788400006", "tags": [], "collections": [], "relations": {}, "dateAdded": "2013-12-23T22:44:51Z", "dateModified": "2013-12-23T22:44:51Z" } }, { "key": "B6ENSAAU", "version": 16, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/B6ENSAAU", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/B6ENSAAU", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "parsedDate": "2011-02", "numChildren": 0 }, "data": { "key": "B6ENSAAU", "version": 16, "itemType": "journalArticle", "title": "Mathematical Modeling Study of Scroll Air Motors and Energy Efficiency Analysis-Part I", "creators": [], "abstractNote": "A scroll air motor, also known as a scroll expander, is a relatively new concept to pneumatic actuators. Its unique structure leads to its feature of high ability in energy conversion. In recent years, scroll air motors have been adopted by combined heat and power boilers, uninterrupted power supplies, and some other energy storage systems as a new mechatronic device for energy conversion. The paper aims to present the work in developing a complete mathematical model of the scroll air motor for analysis of scroll energy efficiency and the factors affecting energy efficiency. The work will be reported in two parts of the paper. The paper describes the derivation of spiral equations, chamber volume calculations, and the driving torque of the scroll air motor. The dynamic process modeling and energy efficiency analysis will be presented in Part II of the paper.", "publicationTitle": "IEEE/ASME Transactions on Mechatronics", "publisher": "", "place": "", "date": "2011 Feb.", "volume": "16", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "112-121", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "IEEE/ASME Trans. Mechatronics (USA)", "DOI": "10.1109/TMECH.2009.2036608", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "INSPEC:11742210", "tags": [], "collections": [], "relations": {}, "dateAdded": "2013-12-23T22:06:04Z", "dateModified": "2013-12-23T22:06:04Z" } }, { "key": "TV3DIMDP", "version": 15, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/TV3DIMDP", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/TV3DIMDP", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Ersoy and Bilir", "parsedDate": "2012", "numChildren": 0 }, "data": { "key": "TV3DIMDP", "version": 15, "itemType": "journalArticle", "title": "Performance characteristics of ejector expander transcritical CO2 refrigeration cycle", "creators": [ { "creatorType": "author", "firstName": "H. Kursad", "lastName": "Ersoy" }, { "creatorType": "author", "firstName": "Nagihan", "lastName": "Bilir" } ], "abstractNote": "The effects on the performance of the basic CO2 refrigeration cycle when using an ejector as the expander to recover expansion work were investigated. A two-phase constant area ejector flow model was used in the ejector analysis. The coefficient of cooling performance and gas cooler pressure that yielded the maximum exergy efficiency, suction nozzle pressure drop, and optimum values for the ejector area ratio were determined for various evaporator and gas cooler outlet temperatures. Parametric studies were performed using engineering equation solver. The suction nozzle pressure drop had a significant effect on the ejector area ratio, coefficient of cooling performance, and exergy efficiency. It is necessary to design an ejector with the optimum area ratio to achieve the optimum pressure drop and maximum performance. Cycle that use the ejector as an expander always has higher coefficient of performance and exergy efficiency than conventional cycle under any operating condition. The irreversibility decreases compared to the classic refrigeration cycle when the ejector or turbine are used as an expander. The analysis results showed that - under a gas cooler pressure of 9.5 MPa, gas cooler outlet temperature of 40 degrees C, evaporator temperature of 5 degrees C, and cooling capacity of 3.5kW - the total irreversibility of the ejector system was lower than those of the basic and turbine expander systems by 39.1% and 5.46%, respectively.", "publicationTitle": "Proceedings of the Institution of Mechanical Engineers Part a-Journal of Power and Energy", "publisher": "", "place": "", "date": "2012", "volume": "226", "issue": "A5", "section": "", "partNumber": "", "partTitle": "", "pages": "623-635", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Proc. Inst. Mech. Eng. Part A-J. Power Energy", "DOI": "10.1177/0957650912446547", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0957-6509", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000309210800002", "tags": [ { "tag": "2-phase ejector", "type": 1 }, { "tag": "Expansion", "type": 1 }, { "tag": "Suction nozzle", "type": 1 }, { "tag": "coefficient of performance", "type": 1 }, { "tag": "ejector", "type": 1 }, { "tag": "exergy", "type": 1 }, { "tag": "exergy analysis", "type": 1 }, { "tag": "expansion device", "type": 1 }, { "tag": "pressure drop", "type": 1 }, { "tag": "system", "type": 1 }, { "tag": "turbine", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-23T21:53:19Z", "dateModified": "2013-12-23T21:53:19Z" } }, { "key": "9MTIVBPC", "version": 14, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/9MTIVBPC", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/9MTIVBPC", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Yamada et al.", "parsedDate": "2012-05", "numChildren": 0 }, "data": { "key": "9MTIVBPC", "version": 14, "itemType": "journalArticle", "title": "Study on thermal efficiency of low- to medium-temperature organic Rankine cycles using HFO-1234yf", "creators": [ { "creatorType": "author", "firstName": "Noboru", "lastName": "Yamada" }, { "creatorType": "author", "firstName": "Md Nor Anuar", "lastName": "Mohamad" }, { "creatorType": "author", "firstName": "Trinh Trung", "lastName": "Kien" } ], "abstractNote": "HFO-1234yf is a new refrigerant with a nearly zero global warming potential (GWP) and ozone depletion potential (ODP): it exhibits thermodynamic properties similar to HFC-134a. The potential of HFO-1234yf as a working fluid for organic Rankine cycles (ORC) is elucidated through a first-order simulation. A fundamental thermodynamic model of ORC with five types of cycles-trilateral, saturated, superheated, sub-critical, and supercritical-is used to compare the thermal efficiency of HFO-1234yf with that of other working fluids. HFO-1234yf was found to offer a thermal efficiency that was comparable to that of HFC-134a. This paper provides a useful map that clearly shows the best possible thermal efficiency among the five types of cycles for various expander inlet and condensation temperatures. The highest thermal efficiency range (8.8%-11.4%) was obtained when the supercritical ORC was used at an expander inlet temperature of 170 +/- 10 degrees C and a condensation temperature range of 20-40 degrees C for the given pump and expander efficiency. It is concluded that HFO-1234yf is a potential working fluid for ORC applications, especially for those with low- to medium-temperature heat sources. (C) 2011 Elsevier Ltd. All rights reserved.", "publicationTitle": "Renewable Energy", "publisher": "", "place": "", "date": "MAY 2012", "volume": "41", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "368-375", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Renew. Energy", "DOI": "10.1016/j.renene.2011.11.028", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0960-1481", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000301029600042", "tags": [ { "tag": "Global warming potential", "type": 1 }, { "tag": "HFO-1234yf", "type": 1 }, { "tag": "Organic Rankine cycle", "type": 1 }, { "tag": "Ozone depletion potential", "type": 1 }, { "tag": "Thermal efficiency", "type": 1 }, { "tag": "Working fluid", "type": 1 }, { "tag": "design", "type": 1 }, { "tag": "optimization", "type": 1 }, { "tag": "orc", "type": 1 }, { "tag": "system", "type": 1 }, { "tag": "waste heat-recovery", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-23T21:39:11Z", "dateModified": "2013-12-23T21:39:11Z" } }, { "key": "QXZTAMW2", "version": 13, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/QXZTAMW2", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/QXZTAMW2", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Subiantoro and Ooi", "parsedDate": "2012-09", "numChildren": 0 }, "data": { "key": "QXZTAMW2", "version": 13, "itemType": "journalArticle", "title": "Analysis of the Revolving Vane (RV-0) expander, part 2: Verifications of theoretical models", "creators": [ { "creatorType": "author", "firstName": "Alison", "lastName": "Subiantoro" }, { "creatorType": "author", "firstName": "Kim Tiow", "lastName": "Ooi" } ], "abstractNote": "Various aspects of the Revolving Vane (RV-0) expander have been theoretically modelled. They include the geometry, kinematics, dynamics, thermodynamics, flow through ports and internal leakage aspects. The models have also been compared to the experimental data. It was found that the predicted output torque matches with the experimental data with an average deviation of 20% while the flow rate predictions have an average deviation of 25%. The temperature of the journal bearing lubricant and the leakage flow rate through the housing clearances are thought to be the main sources of discrepancies. The study also found that the main contributor of the internal leakage is the flow through the radial clearance. (C) 2012 Elsevier Ltd and IIR. All rights reserved.", "publicationTitle": "International Journal of Refrigeration-Revue Internationale Du Froid", "publisher": "", "place": "", "date": "SEP 2012", "volume": "35", "issue": "6", "section": "", "partNumber": "", "partTitle": "", "pages": "1744-1756", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Int. J. Refrig.-Rev. Int. Froid", "DOI": "10.1016/j.ijrefrig.2012.04.014", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0140-7007", "archive": "", "archiveLocation": "", "shortTitle": "Analysis of the Revolving Vane (RV-0) expander, part 2", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000308270600026", "tags": [ { "tag": "Compressor", "type": 1 }, { "tag": "Expansion", "type": 1 }, { "tag": "Modelling", "type": 1 }, { "tag": "Rotary compressor", "type": 1 }, { "tag": "Simulation", "type": 1 }, { "tag": "carbon-dioxide", "type": 1 }, { "tag": "efficiency", "type": 1 }, { "tag": "energy", "type": 1 }, { "tag": "numerical-simulation", "type": 1 }, { "tag": "performance", "type": 1 }, { "tag": "piston expander", "type": 1 }, { "tag": "transcritical co2 cycle", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-23T21:38:19Z", "dateModified": "2013-12-23T21:38:19Z" } }, { "key": "FWG3JFQD", "version": 12, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/FWG3JFQD", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/FWG3JFQD", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Clemente et al.", "parsedDate": "2012-09", "numChildren": 0 }, "data": { "key": "FWG3JFQD", "version": 12, "itemType": "journalArticle", "title": "Energy efficiency analysis of Organic Rankine Cycles with scroll expanders for cogenerative applications", "creators": [ { "creatorType": "author", "firstName": "Stefano", "lastName": "Clemente" }, { "creatorType": "author", "firstName": "Diego", "lastName": "Micheli" }, { "creatorType": "author", "firstName": "Mauro", "lastName": "Reini" }, { "creatorType": "author", "firstName": "Rodolfo", "lastName": "Taccani" } ], "abstractNote": "Small scale Organic Rankine Cycle (ORC) systems has been the object of a large number of studies in the last decade, because of their suitability for energy recovery and cogenerative applications. The paper presents an ORC numerical model and its applications to two different case studies; the code has been obtained by combining a one-dimensional model of a scroll machine and a thermodynamic model of a whole ORC system. Series production components, such as scroll compressors, from HVAC field, have been first considered in order to reduce costs, because this is a critical issue for small scale energy recovery and cogeneration systems. The detailed model of the scroll machine is capable to calculate the performances of both a compressor and an expander, as function of the geometry of the device and of the working fluid. The model has been first tested and validated by comparing its outputs with experimental tests on a commercial scroll compressor, then used to calculate the working curves of commercial scroll machines originally designed as compressors in the HVAC field, but operating as expanders. The model of the expander has been then integrated in the thermodynamic model of the ORC system. A series of comparisons have been carried out in order to evaluate how the performances are influenced by cycle parameters, scroll geometry and working fluid for different applications. The results confirm the feasibility of small scale CHP systems with acceptable electrical efficiency, taking into account the low-temperature thermal source, the small power output and the low-cost series production components employed. (C) 2012 Elsevier Ltd. All rights reserved.", "publicationTitle": "Applied Energy", "publisher": "", "place": "", "date": "SEP 2012", "volume": "97", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "792-801", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Appl. Energy", "DOI": "10.1016/j.apenergy.2012.01.029", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0306-2619", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000307196000092", "tags": [ { "tag": "Energy recovery", "type": 1 }, { "tag": "Micro-cogeneration", "type": 1 }, { "tag": "Scroll expander", "type": 1 }, { "tag": "compressors", "type": 1 }, { "tag": "optimization", "type": 1 }, { "tag": "orc", "type": 1 }, { "tag": "performance", "type": 1 }, { "tag": "power-generation", "type": 1 }, { "tag": "system", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-20T18:27:36Z", "dateModified": "2013-12-20T18:27:36Z" } }, { "key": "ZF4KWGBH", "version": 11, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/ZF4KWGBH", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/ZF4KWGBH", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Bamgbopa and Uzgoren", "parsedDate": "2013-07", "numChildren": 0 }, "data": { "key": "ZF4KWGBH", "version": 11, "itemType": "journalArticle", "title": "Numerical analysis of an organic Rankine cycle under steady and variable heat input", "creators": [ { "creatorType": "author", "firstName": "Musbaudeen O.", "lastName": "Bamgbopa" }, { "creatorType": "author", "firstName": "Eray", "lastName": "Uzgoren" } ], "abstractNote": "This paper develops a strategy to maintain steady operation of an organic Rankine cycle (ORC) by adjusting evaporator flow rates in relation to the available thermal energy. ORC unit under investigation uses R245fa as the working fluid, for which a regression based approach was implemented to evaluate its state properties. Steady and transient models for unit's subcomponents (pump, evaporator, expander and condenser) were developed. Heat source is considered as solar heated water between 80 degrees C and 95 degrees C at mass flow rates between 2 kg/s and 12 kg/s, while the flow rate of R245fa is ranging between 0.5 kg/s and 1.5 kg/s. Due to possible changes in the available thermal energy, unit's evaporator was identified as the critical component of the ORC. Evaporator's effectiveness was characterized as a function of inlet temperatures and mass flow rates to map steady operation scenarios for changing conditions. Steady state analysis shows that the selected ORC system is capable of producing 13-39 kW power for heat inputs varying between 125 kW and 367 kW with maximum efficiency in the defined operating range. Subsequently, the developed steady state map is used to construct a control strategy. This strategy aims to adjust evaporator flow rates in order to achieve maximum and steady energy recovery for any given level of heat input. The unit is simulated to study its dynamic response when available thermal energy gradually or abruptly changes with and without the control strategy. It is demonstrated that adjusting flow rates not only improves the thermal efficiency but also helps maintaining the steady state operation. (C) 2013 Elsevier Ltd. All rights reserved.", "publicationTitle": "Applied Energy", "publisher": "", "place": "", "date": "JUL 2013", "volume": "107", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "219-228", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Appl. Energy", "DOI": "10.1016/j.apenergy.2013.02.040", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0306-2619", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000318456700019", "tags": [ { "tag": "Evaporator effectiveness", "type": 1 }, { "tag": "Organic Rankine cycle", "type": 1 }, { "tag": "R245fa", "type": 1 }, { "tag": "Transient heat transfer", "type": 1 }, { "tag": "micro-chp systems", "type": 1 }, { "tag": "optimization", "type": 1 }, { "tag": "orc", "type": 1 }, { "tag": "thermodynamic analysis", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-20T17:12:27Z", "dateModified": "2013-12-20T17:12:27Z" } }, { "key": "78EZWZRS", "version": 10, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/78EZWZRS", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/78EZWZRS", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Bamgbopa and Uzgoren", "parsedDate": "2013-08", "numChildren": 0 }, "data": { "key": "78EZWZRS", "version": 10, "itemType": "journalArticle", "title": "Quasi-dynamic model for an organic Rankine cycle", "creators": [ { "creatorType": "author", "firstName": "Musbaudeen O.", "lastName": "Bamgbopa" }, { "creatorType": "author", "firstName": "Eray", "lastName": "Uzgoren" } ], "abstractNote": "When considering solar based thermal energy input to an organic Rankine cycle (ORC), intermittent nature of the heat input does not only adversely affect the power output but also it may prevent ORC to operate under steady state conditions. In order to identify reliability and efficiency of such systems, this paper presents a simplified transient modeling approach for an ORC operating under variable heat input. The approach considers that response of the system to heat input variations is mainly dictated by the evaporator. Consequently, overall system is assembled using dynamic models for the heat exchangers (evaporator and condenser) and static models of the pump and the expander. In addition, pressure drop within heat exchangers is neglected. The model is compared to benchmark numerical and experimental data showing that the underlying assumptions are reasonable for cases where thermal input varies in time. Furthermore, the model is studied on another configuration and mass flow rates of both the working fluid and hot water and hot water's inlet temperature to the ORC unit are shown to have direct influence on the system's response. (C) 2013 Elsevier Ltd. All rights reserved.", "publicationTitle": "Energy Conversion and Management", "publisher": "", "place": "", "date": "AUG 2013", "volume": "72", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "117-124", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Energy Conv. Manag.", "DOI": "10.1016/j.enconman.2013.01.040", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0196-8904", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000320841200017", "tags": [ { "tag": "Organic Rankine cycle", "type": 1 }, { "tag": "R245fa", "type": 1 }, { "tag": "Solar energy", "type": 1 }, { "tag": "Transient analysis", "type": 1 }, { "tag": "boiling heat-transfer", "type": 1 }, { "tag": "channels", "type": 1 }, { "tag": "design", "type": 1 }, { "tag": "fluid", "type": 1 }, { "tag": "optimization", "type": 1 }, { "tag": "orc", "type": 1 }, { "tag": "performance", "type": 1 }, { "tag": "system", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-20T17:11:18Z", "dateModified": "2013-12-20T17:11:18Z" } }, { "key": "5J8S2RHU", "version": 9, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/5J8S2RHU", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/5J8S2RHU", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Bracco et al.", "parsedDate": "2013-09-01", "numChildren": 0 }, "data": { "key": "5J8S2RHU", "version": 9, "itemType": "journalArticle", "title": "Experimental tests and modelization of a domestic-scale ORC (Organic Rankine Cycle)", "creators": [ { "creatorType": "author", "firstName": "Roberto", "lastName": "Bracco" }, { "creatorType": "author", "firstName": "Stefano", "lastName": "Clemente" }, { "creatorType": "author", "firstName": "Diego", "lastName": "Micheli" }, { "creatorType": "author", "firstName": "Mauro", "lastName": "Reini" } ], "abstractNote": "The work deals with the realization, the experimental testing and the modelization of a small-size ORC (Organic Rankine Cycle) prototype. The main components of the circuit, filled with the refrigerant R245fa, are a plate condenser, an inverter-driven diaphragm pump, an electric boiler and a scroll expander. The latter is a hermetic device, derived from a commercial HVAC compressor, and expected to deliver a power of about 1.5 kW. Some performance parameters of the whole cycle and of the plant components have been investigated by means of a series of experimental tests, whose results are discussed in the paper. The registered working parameters and efficiencies are comparable with those expected from previous studies and reported in literature, even if the system is not yet optimized. These results are the basis for the numerical modelization of the cycle, realized with the simulation software LMS Imaginelab AMESim (R), capable to simulate systems also in transient conditions. This model, calibrated on the basis of the experimental measurements, has revealed a good skill in predicting the main working parameters of the system, so it will be used to achieve a better knowledge of the physical system and to choose a more suitable control strategy for the prototype. (C) 2012 Elsevier Ltd. All rights reserved.", "publicationTitle": "Energy", "publisher": "", "place": "", "date": "SEP 1 2013", "volume": "58", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "107-116", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Energy", "DOI": "10.1016/j.energy.2012.12.016", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0360-5442", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000323534900013", "tags": [ { "tag": "ORC dynamic modelization", "type": 1 }, { "tag": "ORC test bench", "type": 1 }, { "tag": "Organic Rankine cycle", "type": 1 }, { "tag": "Scroll expander", "type": 1 }, { "tag": "efficiency", "type": 1 }, { "tag": "expander", "type": 1 }, { "tag": "fluids", "type": 1 }, { "tag": "system", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-20T16:57:29Z", "dateModified": "2013-12-20T16:57:29Z" } }, { "key": "89P9SSNR", "version": 6, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/89P9SSNR", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/89P9SSNR", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Bu et al.", "parsedDate": "2013-09", "numChildren": 0 }, "data": { "key": "89P9SSNR", "version": 6, "itemType": "journalArticle", "title": "Performance analysis and working fluids selection of solar powered organic Rankine-vapor compression ice maker", "creators": [ { "creatorType": "author", "firstName": "X. B.", "lastName": "Bu" }, { "creatorType": "author", "firstName": "H. S.", "lastName": "Li" }, { "creatorType": "author", "firstName": "L. B.", "lastName": "Wang" } ], "abstractNote": "To develop the organic Rankine cycle/vapor compression cycle (ORC/VCC) ice maker driven by solar energy, a thermodynamic model was developed, and four working fluids of R123, R245fa, R600a and R600 were selected and evaluated to identify suitable working fluids which may yield high system efficiencies. Besides, the effects of generation temperature and condensation temperature on the system performance were also analyzed. In terms of power efficiency and expander size, R600 and R600a are more suitable working fluids for ORC. Also, R600a and R600 are more appropriate working fluids for VCC in terms of pressure ratio and coefficient of performance. In terms of overall efficiency and ice production per square meter collector per day, R123 is most suitable working fluid for ORC/VCC. The generation temperature and condensation temperature have important effects on overall efficiency and ice production. There is always an optimal generation temperature at which overall efficiency and ice production can achieve the maximum values, while the generation temperature can be controlled by changing the mass flow rate of working fluid for ORC. In addition, the system performance and payback period should be comprehensively considered so as to decide to adopt air cooled or water cooled condenser due to having different condensation temperature. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.", "publicationTitle": "Solar Energy", "publisher": "", "place": "", "date": "SEP 2013", "volume": "95", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "271-278", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Sol. Energy", "DOI": "10.1016/j.solener.2013.06.024", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0038-092X", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000324013600025", "tags": [ { "tag": "Ice maker", "type": 1 }, { "tag": "Organic Rankine cycle-vapor compression cycle", "type": 1 }, { "tag": "Solar energy", "type": 1 }, { "tag": "Working fluids selection", "type": 1 }, { "tag": "absorption cooling system", "type": 1 }, { "tag": "adsorption", "type": 1 }, { "tag": "cycle", "type": 1 }, { "tag": "efficiency", "type": 1 }, { "tag": "energy", "type": 1 }, { "tag": "heat", "type": 1 }, { "tag": "optimization", "type": 1 }, { "tag": "orc", "type": 1 }, { "tag": "prediction", "type": 1 }, { "tag": "refrigeration system", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-19T21:33:30Z", "dateModified": "2013-12-19T21:33:30Z" } }, { "key": "HN4J5V73", "version": 5, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/HN4J5V73", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/HN4J5V73", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Wang et al.", "parsedDate": "2013-11", "numChildren": 0 }, "data": { "key": "HN4J5V73", "version": 5, "itemType": "journalArticle", "title": "Performance Analysis of Organic Rankine Cycle With Preliminary Design of Radial Turbo Expander for Binary-Cycle Geothermal Plants", "creators": [ { "creatorType": "author", "firstName": "Xing", "lastName": "Wang" }, { "creatorType": "author", "firstName": "Xiaomin", "lastName": "Liu" }, { "creatorType": "author", "firstName": "Chuhua", "lastName": "Zhang" } ], "abstractNote": "In order to produce less emission of greenhouse gases, many studies have been done on the binary-cycle geothermal power plant to obtain better performance. The radial turbo expanders play an important role in the performance of the organic rankine cycle (ORC) for binary-cycle geothermal plants. However, few studies have investigated the effect of parameters of radial turbo expanders on the performance of the ORC. In this paper, a new thermodynamic model of the ORC coupled with the preliminary design of radial turbo expanders is developed. The effects of geothermal water temperature on the ORC performance parameters, such as power output and thermal efficiency are investigated by using the proposed thermodynamic model. The variation of radial turbo expanders' parameters, such as specific rotational speed with geothermal water temperature is revealed. In the present study, the reasonable efficiency of radial turbo expanders by using the preliminary design is adopted to analyze the performance of the ORC, and an accurate reference about the effect of geothermal source on the parameters of radial turbo expanders is obtained.", "publicationTitle": "Journal of Engineering for Gas Turbines and Power-Transactions of the Asme", "publisher": "", "place": "", "date": "NOV 2013", "volume": "135", "issue": "11", "section": "", "partNumber": "", "partTitle": "", "pages": "111402", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "J. Eng. Gas. Turbines Power-Trans. ASME", "DOI": "10.1115/1.4025040", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0742-4795", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "English", "libraryCatalog": "ISI Web of Knowledge", "callNumber": "", "rights": "", "extra": "WOS:000326160900003", "tags": [ { "tag": "orc", "type": 1 }, { "tag": "parametric optimization", "type": 1 }, { "tag": "temperature", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-19T21:31:01Z", "dateModified": "2013-12-19T21:31:01Z" } }, { "key": "48HR5EEE", "version": 4, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/48HR5EEE", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/48HR5EEE", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Bell et al.", "parsedDate": "2013-11", "numChildren": 0 }, "data": { "key": "48HR5EEE", "version": 4, "itemType": "journalArticle", "title": "A computationally efficient hybrid leakage model for positive displacement compressors and expanders", "creators": [ { "creatorType": "author", "firstName": "Ian H.", "lastName": "Bell" }, { "creatorType": "author", "firstName": "Eckhard A.", "lastName": "Groll" }, { "creatorType": "author", "firstName": "James E.", "lastName": "Braun" }, { "creatorType": "author", "firstName": "W. Travis", "lastName": "Horton" } ], "abstractNote": "An empirical frictional correction factor to the isentropic nozzle model has been developed for application to refrigerant leakage modeling in scroll, rotary and other similar compressors and expanders. This correction factor is derived by calculating the leakage mass flow rate with a compressible, variable area, real gas properties model and referencing the results to an isentropic nozzle model. The ratio of flows is correlated to the Reynolds number, a characteristic length and the leakage gap width. A representative selection of fluids and geometries are employed. For all the correlations, at least 93% of the points are predicted within an absolute error band of 20%.", "publicationTitle": "International Journal of Refrigeration", "publisher": "", "place": "", "date": "November 2013", "volume": "36", "issue": "7", "section": "", "partNumber": "", "partTitle": "", "pages": "1965-1973", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "International Journal of Refrigeration", "DOI": "10.1016/j.ijrefrig.2013.01.005", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0140700713000200", "accessDate": "2013-12-19T19:31:43Z", "PMID": "", "PMCID": "", "ISSN": "0140-7007", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Compressor", "type": 1 }, { "tag": "Expanders", "type": 1 }, { "tag": "Leakage", "type": 1 }, { "tag": "Simulation", "type": 1 }, { "tag": "compresseur", "type": 1 }, { "tag": "détendeurs", "type": 1 }, { "tag": "fuite", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-12-19T19:31:43Z", "dateModified": "2013-12-19T19:31:43Z" } }, { "key": "3X8QBT5X", "version": 3, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/3X8QBT5X", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/3X8QBT5X", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/238690/items/HJGUHZ63", "type": "application/json" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } } }, "data": { "key": "3X8QBT5X", "version": 3, "parentItem": "HJGUHZ63", "itemType": "attachment", "linkMode": "linked_url", "title": "Google Books Link", "accessDate": "2013-12-19T19:28:52Z", "url": "http://books.google.com/books?id=gumvHDQmJD0C", "note": "", "contentType": "text/html", "charset": "", "tags": [], "relations": {}, "dateAdded": "2013-12-19T19:28:52Z", "dateModified": "2013-12-19T19:28:52Z" } }, { "key": "HJGUHZ63", "version": 3, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/HJGUHZ63", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/HJGUHZ63", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Umberto et al.", "numChildren": 1 }, "data": { "key": "HJGUHZ63", "version": 3, "itemType": "book", "title": "ECOS 2012 The 25th International Conference on Efficiency, Cost, Optimization and Simulation of Energy Conversion Systems and Processes (Perugia, June 26th-June 29th, 2012)", "creators": [ { "creatorType": "author", "firstName": "a cura di Desideri", "lastName": "Umberto" }, { "creatorType": "author", "firstName": "Manfrida", "lastName": "Giampaolo" }, { "creatorType": "author", "firstName": "Sciubba", "lastName": "Enrico" } ], "abstractNote": "", "series": "", "seriesNumber": "", "volume": "", "numberOfVolumes": "", "edition": "", "date": "", "publisher": "Firenze University Press", "place": "", "originalDate": "", "originalPublisher": "", "originalPlace": "", "format": "", "numPages": "3218", "ISBN": "9788866553229", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "Google Books", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2013-12-19T19:28:52Z", "dateModified": "2013-12-19T19:28:52Z" } }, { "key": "V87JTD42", "version": 2, "library": { "type": "group", "id": 238690, "name": "Positive Displacement Expander Modeling", "links": { "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/238690/items/V87JTD42", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/positive_displacement_expander_modeling/items/V87JTD42", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1261598, "username": "Bibliobomb", "name": "Alex Hernandez", "links": { "alternate": { "href": "https://www.zotero.org/bibliobomb", "type": "text/html" } } }, "creatorSummary": "Clemente et al.", "parsedDate": "2011-01-01", "numChildren": 0 }, "data": { "key": "V87JTD42", "version": 2, "itemType": "journalArticle", "title": "Performance Analysis and Modeling of Different Volumetric Expanders for Small-Scale Organic Rankine Cycles", "creators": [ { "creatorType": "author", "firstName": "Stefano", "lastName": "Clemente" }, { "creatorType": "author", "firstName": "Diego", "lastName": "Micheli" }, { "creatorType": "author", "firstName": "Mauro", "lastName": "Reini" }, { "creatorType": "author", "firstName": "Rodolfo", "lastName": "Taccani" } ], "abstractNote": "In the last years one of the main research topics in energy field is represented by Organic Rankine Cycles (ORCs), due to their applicability in energy recovery from waste heat and in distributed combined heat and power (CHP) generation, particularly in small and micro scale systems. One of the key devices of the cycle is the expander: it must have a limited cost (like all the other components, in order to ensure the economic feasibility), but also a high efficiency, since the temperature of the heat source is often low and then the cycle efficiency is inherently scarce. In the first part of this paper a literature review on various positive-displacement expanders is presented, in order to outline their performances and their application field. Then, the numerical model of a volumetric reciprocating expander is implemented. This model, and another one previously developed to simulate scroll expanders, is combined with a thermodynamic model of the whole ORC system, so that a comparison between the two technologies can be carried out. The results confirm the possibility of realizing small scale energy recovery and cogeneration (CHP) systems with acceptable electrical efficiency also adopting low-cost components, directly derived from large scale industrial components.", "publicationTitle": "", "publisher": "", "place": "", "date": "January 1, 2011", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "375-384", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1115/ES2011-54302", "citationKey": "", "url": "http://dx.doi.org/10.1115/ES2011-54302", "accessDate": "2013-12-19T19:28:25Z", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Silverchair", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2013-12-19T19:28:25Z", "dateModified": "2013-12-19T19:28:25Z" } } ]