[ { "key": "KZUA7XHB", "version": 18, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/KZUA7XHB", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/KZUA7XHB", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Hakkarainen et al.", "parsedDate": "2015-06-28", "numChildren": 0 }, "data": { "key": "KZUA7XHB", "version": 18, "itemType": "journalArticle", "title": "Dynamic Model Development of Linear Fresnel Solar Field", "creators": [ { "creatorType": "author", "firstName": "Elina", "lastName": "Hakkarainen" }, { "creatorType": "author", "firstName": "Matti", "lastName": "Tähtinen" }, { "creatorType": "author", "firstName": "Hannu", "lastName": "Mikkonen" } ], "abstractNote": "As a dispatchable clean energy source, concentrated solar power (CSP) can be one of the key technologies to overcome many problems related to fossil fuel consumption and electricity balancing problems. Solar is a variable location, time and weather dependent source of energy, which sets challenges to solar field operations. With proper dynamic simulation tools it is possible to study dynamics of CSP field under changing weather conditions, find optimum control strategies, and plan and predict the performance of the field.CSP technology considered in this paper, linear Fresnel reflector (LFR), is a proven line focusing technology, having simpler design but suffering in optical performance compared to more mature parabolic trough (PT) technology. Apros dynamic simulation software is used to configure and simulate the solar field. Apros offers a possibility to dynamically simulate field behavior with varying collector configuration, field layout and control mode under varying irradiation conditions. The solar field applies recirculation (RC) as a control mode and direct steam generation (DSG) producing superheated steam. DSG sets challenges for the control scheme, which main objective is to maintain constant steam pressure and temperature at the solar field outlet under varying inlet water and energy conditions, while the steam mass flow can vary.The design and formulation of an entire linear Fresnel solar field in Apros is presented, as well as the obtained control scheme. The field includes user defined amount of collector modules, control system and two modules describing solar irradiation on the field. As two-phase water/steam flow is used, an accurate 6-equation model is used in Apros. Irradiation on the solar field under clear sky conditions is calculated according to time, position and Linke turbidity factor. Overcast conditions can be created by the clear sky index. For LFR single-axis sun tracking system is applied.In order to test the model functionality and to investigate the field behavior, thermal performance of the field was simulated at different dates at two different locations, and the results were compared. Similar field dimensions and control schemes were applied in each case, and simulations were done for full 24 hours in order to study the daily operations and ensure process stability. Control scheme functionality is evaluated based on the plant behavior in simulation cases having different operational conditions.The proper operability of the configured LFR model is evaluated. Obtained performance results show differences between locations and variation depending on season and time. The importance of a proper control system is revealed. The results show that the dynamic model development of a solar field is necessary in order to simulate plant behavior under varying irradiation conditions and to further develop optimal field control schemes and field optimizing process. The future work in the development of the LFR model presented will focus on dynamic response behavior development under transient conditions and field start-up and shut down procedure development.", "publicationTitle": "", "publisher": "", "place": "", "date": "June 28, 2015", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "V001T05A009", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1115/ES2015-49347", "citationKey": "", "url": "http://dx.doi.org/10.1115/ES2015-49347", "accessDate": "2016-06-15T16:01:20Z", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Silverchair", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T16:01:20Z", "dateModified": "2016-06-15T16:01:20Z" } }, { "key": "7HX7MWAT", "version": 18, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/7HX7MWAT", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/7HX7MWAT", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Kumar et al.", "parsedDate": "2015-04", "numChildren": 0 }, "data": { "key": "7HX7MWAT", "version": 18, "itemType": "journalArticle", "title": "Fresnel lens: A promising alternative of reflectors in concentrated solar power", "creators": [ { "creatorType": "author", "firstName": "Vinod", "lastName": "Kumar" }, { "creatorType": "author", "firstName": "R. L.", "lastName": "Shrivastava" }, { "creatorType": "author", "firstName": "S. P.", "lastName": "Untawale" } ], "abstractNote": "Modern solar energy harnessing technology demands high grade energy to achieve efficient power generation with compact plant size and least payback period. But readily available solar energy is low grade energy. Concentrated Solar Power (CSP) technology is capable to cater the demand. Reflector or mirror in CSP contributes 50% of total cost of installation, hence huge initial investment and high life cycle costs are the major challenges associated with such plants. Moreover due to adverse service conditions and environmental impacts, it gets degraded early, causing substantial drop in efficiency and consequently reduction in life cycle. Fresnel lens as solar concentrator in Photovoltaic/Thermal (PV/T) applications may prove to be a promising alternative due to its potential to overcome techno-commercial constraints associated with conventional reflector based CSP. A critical review covering global CSP deployment, operational requirement and failure mechanism in mirrors/reflectors is being presented. As an alternative, design considerations of Fresnel lens and its effect on various efficiencies, reflectance, transmittance and associated losses are discussed. Learning from early research work, innovative and emerging trends, economics, challenges and advantages are also presented.", "publicationTitle": "Renewable and Sustainable Energy Reviews", "publisher": "", "place": "", "date": "April 2015", "volume": "44", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "376-390", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Renewable and Sustainable Energy Reviews", "DOI": "10.1016/j.rser.2014.12.006", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S1364032114010582", "accessDate": "2016-06-15T16:01:10Z", "PMID": "", "PMCID": "", "ISSN": "1364-0321", "archive": "", "archiveLocation": "", "shortTitle": "Fresnel lens", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T16:01:10Z", "dateModified": "2016-06-15T16:01:10Z" } }, { "key": "PDCVWJAF", "version": 17, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/PDCVWJAF", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/PDCVWJAF", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Abbas et al.", "parsedDate": "2012", "numChildren": 0 }, "data": { "key": "PDCVWJAF", "version": 17, "itemType": "journalArticle", "title": "Solar radiation concentration features in Linear Fresnel Reflector arrays", "creators": [ { "creatorType": "author", "firstName": "R.", "lastName": "Abbas" }, { "creatorType": "author", "firstName": "M.J.", "lastName": "Montes" }, { "creatorType": "author", "firstName": "M.", "lastName": "Piera" }, { "creatorType": "author", "firstName": "J.M.", "lastName": "Martínez-Val" } ], "abstractNote": "", "publicationTitle": "Energy Conversion and Management", "publisher": "", "place": "", "date": "2/2012", "volume": "54", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "133-144", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1016/j.enconman.2011.10.010", "citationKey": "", "url": "http://linkinghub.elsevier.com/retrieve/pii/S0196890411002743", "accessDate": "2016-06-15T16:00:47Z", "PMID": "", "PMCID": "", "ISSN": "01968904", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T16:00:47Z", "dateModified": "2016-06-15T16:00:47Z" } }, { "key": "FKJXGI65", "version": 16, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/FKJXGI65", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/FKJXGI65", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Abbas et al.", "parsedDate": "2013", "numChildren": 0 }, "data": { "key": "FKJXGI65", "version": 16, "itemType": "journalArticle", "title": "High concentration linear Fresnel reflectors", "creators": [ { "creatorType": "author", "firstName": "R.", "lastName": "Abbas" }, { "creatorType": "author", "firstName": "J.", "lastName": "Muñoz-Antón" }, { "creatorType": "author", "firstName": "M.", "lastName": "Valdés" }, { "creatorType": "author", "firstName": "J.M.", "lastName": "Martínez-Val" } ], "abstractNote": "", "publicationTitle": "Energy Conversion and Management", "publisher": "", "place": "", "date": "8/2013", "volume": "72", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "60-68", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1016/j.enconman.2013.01.039", "citationKey": "", "url": "http://linkinghub.elsevier.com/retrieve/pii/S0196890413001337", "accessDate": "2016-06-15T16:00:17Z", "PMID": "", "PMCID": "", "ISSN": "01968904", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T16:00:17Z", "dateModified": "2016-06-15T16:00:17Z" } }, { "key": "4ZEZ9AA3", "version": 15, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/4ZEZ9AA3", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/4ZEZ9AA3", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Montes et al.", "parsedDate": "2016-07-05", "numChildren": 0 }, "data": { "key": "4ZEZ9AA3", "version": 15, "itemType": "journalArticle", "title": "Performance model and thermal comparison of different alternatives for the Fresnel single-tube receiver", "creators": [ { "creatorType": "author", "firstName": "María J.", "lastName": "Montes" }, { "creatorType": "author", "firstName": "Rubén", "lastName": "Barbero" }, { "creatorType": "author", "firstName": "Rubén", "lastName": "Abbas" }, { "creatorType": "author", "firstName": "Antonio", "lastName": "Rovira" } ], "abstractNote": "Although most of recent commercial Solar Thermal Power Plants (STPP) installed worldwide are parabolic trough plants, it seems that Linear Fresnel Collectors (LFC) are becoming an attractive option to generate electricity from solar radiation.\n\nContrary to parabolic trough collectors, the design of LFC receivers has many degrees of freedom, and two basic designs can be found in the literature: single-tube and multi-tube design. This article studies the single-tube design, for which a thermal model has been developed. This model has been thought to be accurate enough to characterize the heat transfer in a non-elementary geometry and flexible enough to support changes of the characteristic parameters in the receiver design.\n\nThe thermal model proposed is based on a two-dimensional, steady-state energy balance, in the receiver cross section and along its length. One of the features of the model is the characterization of the convective and radiative heat transfer in the receiver cavity, as it is not an elementary geometry. Another feature is the possibility of studying the receiver performance with different working fluids, both single-phase or two-phase. At last, the receiver performance has been characterized by means of the energy and exergy efficiency. Both variables are important for a complete receiver thermal analysis, as will be shown in the paper.\n\nThe model has been first applied to the comparative study of the thermal performance of LFC receivers based on the value of some parameters: selective coating emissivity in the tube and inlet fluid thermal properties, for the case of using water/steam. As a second result, the model has also been used to predict the performance of different working fluids: synthetic oil, water/steam, molten salt and air, also comparing the results of the Fresnel technology with those obtained in reference parabolic trough loops.", "publicationTitle": "Applied Thermal Engineering", "publisher": "", "place": "", "date": "July 5, 2016", "volume": "104", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "162-175", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Applied Thermal Engineering", "DOI": "10.1016/j.applthermaleng.2016.05.015", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S1359431116306676", "accessDate": "2016-06-15T15:27:04Z", "PMID": "", "PMCID": "", "ISSN": "1359-4311", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:27:04Z", "dateModified": "2016-06-15T15:27:04Z" } }, { "key": "2JN5WFEM", "version": 14, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/2JN5WFEM", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/2JN5WFEM", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Abbas and Martínez-Val", "parsedDate": "2015-03", "numChildren": 0 }, "data": { "key": "2JN5WFEM", "version": 14, "itemType": "journalArticle", "title": "Analytic optical design of linear Fresnel collectors with variable widths and shifts of mirrors", "creators": [ { "creatorType": "author", "firstName": "R.", "lastName": "Abbas" }, { "creatorType": "author", "firstName": "J. M.", "lastName": "Martínez-Val" } ], "abstractNote": "Linear Fresnel collectors still present a large margin to improve efficiency. Solar fields of this kind installed until current time, both prototypes and commercial plants, are designed with widths and shifts of mirrors that are constant across the solar field. However, the physical processes that limit the width of the mirrors depend on their relative locations to the receiver; the same applies to shading and blocking effects, that oblige to have a minimum shift between mirrors. In this work such phenomena are studied analytically in order to obtain a coherent design, able to improve the efficiency with no increase in cost. A ray tracing simulation along one year has been carried out for a given design, obtaining a moderate increase in radiation collecting efficiency in comparison to conventional designs. Moreover, this analytic theory can guide future designs aiming at fully optimizing linear Fresnel collectors' performance.", "publicationTitle": "Renewable Energy", "publisher": "", "place": "", "date": "March 2015", "volume": "75", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "81-92", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Renewable Energy", "DOI": "10.1016/j.renene.2014.09.029", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0960148114005941", "accessDate": "2016-06-15T15:26:20Z", "PMID": "", "PMCID": "", "ISSN": "0960-1481", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:26:20Z", "dateModified": "2016-06-15T15:26:20Z" } }, { "key": "NEV2FFJT", "version": 13, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/NEV2FFJT", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/NEV2FFJT", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Sait et al.", "parsedDate": "2015-03-01", "numChildren": 0 }, "data": { "key": "NEV2FFJT", "version": 13, "itemType": "journalArticle", "title": "Fresnel-based modular solar fields for performance/cost optimization in solar thermal power plants: A comparison with parabolic trough collectors", "creators": [ { "creatorType": "author", "firstName": "Hani H.", "lastName": "Sait" }, { "creatorType": "author", "firstName": "Jose M.", "lastName": "Martinez-Val" }, { "creatorType": "author", "firstName": "Ruben", "lastName": "Abbas" }, { "creatorType": "author", "firstName": "Javier", "lastName": "Munoz-Anton" } ], "abstractNote": "Linear Fresnel collectors are identified as a technology that should play a main role in order to reduce cost of Concentrating Solar Power. An optical and thermal analysis of the different blocks of the solar power plant is carried out, where Fresnel arrays are compared with the most extended linear technology: parabolic trough collectors. It is demonstrated that the optical performance of Fresnel array is very close to that of PTC, with similar values of maximum flux intensities. In addition, if the heat carrier fluid flows in series by the tubes of the receiver, relatively high thermal efficiencies are achieved. Thus, an annual solar to electricity efficiency of 19% is expected, which is similar to the state of the art in PTCs; this is done with a reduction of costs, thanks to lighter structures, that drives to an estimation of LCOE of around 6.5 c€/kWh.", "publicationTitle": "Applied Energy", "publisher": "", "place": "", "date": "March 1, 2015", "volume": "141", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "175-189", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Applied Energy", "DOI": "10.1016/j.apenergy.2014.11.074", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0306261914012434", "accessDate": "2016-06-15T15:24:03Z", "PMID": "", "PMCID": "", "ISSN": "0306-2619", "archive": "", "archiveLocation": "", "shortTitle": "Fresnel-based modular solar fields for performance/cost optimization in solar thermal power plants", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:24:03Z", "dateModified": "2016-06-15T15:24:03Z" } }, { "key": "5VPK9NQK", "version": 12, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/5VPK9NQK", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/5VPK9NQK", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Shanks et al.", "parsedDate": "2015", "numChildren": 0 }, "data": { "key": "5VPK9NQK", "version": 12, "itemType": "bookSection", "title": "High-Concentration Optics for Photovoltaic Applications", "creators": [ { "creatorType": "author", "firstName": "Katie", "lastName": "Shanks" }, { "creatorType": "author", "firstName": "Sundaram", "lastName": "Senthilarasu" }, { "creatorType": "author", "firstName": "Tapas K.", "lastName": "Mallick" }, { "creatorType": "editor", "firstName": "Pedro", "lastName": "Pérez-Higueras" }, { "creatorType": "editor", "firstName": "Eduardo F.", "lastName": "Fernández" } ], "abstractNote": "The concept of a high-concentration optical system is introduced detailing the various design types and focusing only on those aimed at photovoltaic (PV) applications. This will include point focus, line focus, imaging, nonimaging, and the classical cassegrain set-up. The theory of high-concentration optics is explained in terms of idealised concepts and maximum limits for each concentrator type and combination. The optical system is broken down into the different stages and materials possible in a high-concentration configuration. The physics of reflective and refractive optics are described, and their associated errors, advantages and a brief overview of past milestones, and recent research trends in the area of high-concentration PVs are presented. Current primary and secondary optics are geometrically explained covering Fresnel, parabolic, heliostat, compound parabolic, hyperboloid, v-trough, and dome-shaped optics. This chapter also covers examples of new secondary optics, such as the three-dimensional crossed-compound parabolic concentrator and the square elliptical hyperboloid concentrator. The aim of this chapter is to provide the basic optical behaviour of high-concentration designs aimed at PV applications considering their geometry, materials, and reliability.", "bookTitle": "High Concentrator Photovoltaics", "series": "Green Energy and Technology", "seriesNumber": "", "volume": "", "numberOfVolumes": "", "edition": "", "date": "2015", "publisher": "Springer International Publishing", "place": "", "originalDate": "", "originalPublisher": "", "originalPlace": "", "format": "", "pages": "85-113", "ISBN": "978-3-319-15038-3 978-3-319-15039-0", "DOI": "", "citationKey": "", "url": "http://link.springer.com/chapter/10.1007/978-3-319-15039-0_4", "accessDate": "2016-06-15T15:23:18Z", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "link.springer.com", "callNumber": "", "rights": "©2015 Springer International Publishing Switzerland", "extra": "DOI: 10.1007/978-3-319-15039-0_4", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:23:18Z", "dateModified": "2016-06-15T15:23:18Z" } }, { "key": "ZIEU88CG", "version": 11, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/ZIEU88CG", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/ZIEU88CG", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Shvarts and Soluyanov", "parsedDate": "2009", "numChildren": 0 }, "data": { "key": "ZIEU88CG", "version": 11, "itemType": "conferencePaper", "title": "Development and testing of high concentration flat-plate Fresnel lenses", "creators": [ { "creatorType": "author", "firstName": "M. Z.", "lastName": "Shvarts" }, { "creatorType": "author", "firstName": "A. A.", "lastName": "Soluyanov" } ], "abstractNote": "In the work, stages of designing, optimizing, manufacturing and testing the circular flat-plate Fresnel lenses (FLs) for photovoltaic modules with multi-junction solar cells (SCs) are presented. A mathematical model based on ray tracing has been developed for optimizing lenses design parameters and calculating their optical-power characteristics (OPCs). In searching the optimum combination of the lens aperture, its focal distance and refracting profile parameters, the optimization criterion was the maximum of the average sunlight concentration at high optical efficiency in the focal spot of minimum size. Analysis of OPCs of circular Fresnel lenses with conical (the generatrix of surface is a straight line) and curvilinear (the generatrix of surface is a curved line) refracting surfaces has been carried out. Fresnel lens specimens were fabricated and a control of their profile parameters has been done. Experimental lens OPCs have been obtained with use of newly developed optical test bench. A degree of the effect of the light flux and Fresnel lens geometrical imperfections on validity of the experimental data interpretation has been determined. To establish the lens optical efficiency values at standard irradiance conditions, the correction of the calculation model was done. Also, the effect of temperature on the lens optical efficiency is studied.", "proceedingsTitle": "", "conferenceName": "", "publisher": "", "place": "", "date": "2009", "eventPlace": "", "volume": "7423", "issue": "", "numberOfVolumes": "", "pages": "74230G-74230G-10", "series": "", "seriesNumber": "", "DOI": "10.1117/12.825614", "ISBN": "", "citationKey": "", "url": "http://dx.doi.org/10.1117/12.825614", "accessDate": "2016-06-15T15:16:01Z", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Silverchair", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:16:01Z", "dateModified": "2016-06-15T15:16:01Z" } }, { "key": "D7QDDSHK", "version": 10, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/D7QDDSHK", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/D7QDDSHK", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Hornung et al.", "parsedDate": "2010", "numChildren": 0 }, "data": { "key": "D7QDDSHK", "version": 10, "itemType": "conferencePaper", "title": "Temperature and wavelength dependent measurement and simulation of Fresnel lenses for concentrating photovoltaics", "creators": [ { "creatorType": "author", "firstName": "Thorsten", "lastName": "Hornung" }, { "creatorType": "author", "firstName": "Andreas", "lastName": "Bachmaier" }, { "creatorType": "author", "firstName": "Peter", "lastName": "Nitz" }, { "creatorType": "author", "firstName": "Andreas", "lastName": "Gombert" } ], "abstractNote": "Fresnel lenses are often used as primary optical components in concentrating photovoltaics (CPV). When applied in the field, varying conditions during operation lead to variations in lens temperature which has a strong impact on the optical efficiency of the lenses. A setup for indoor characterization with the ability to heat lens plates allows for the assessment of the quality of Fresnel lenses by means of their irradiance profiles in the focal plane. To analyze the measured temperature dependency we simulate thermal deformations of the lens geometry with finite element method (FEM) tools and use the resulting lens geometry as an input to ray tracing simulations. A close match between computer simulations and measurements of the irradiance profile in the focal plane is achieved, validating our simulation approach. This allows us to judge and optimize the temperature dependence of new lens designs before building and testing prototypes. The simulation enables us to analyze and understand all superimposed effects in detail. The developed tools in combination with detailed solar resource data and knowledge of the CPV system will be the basis for future assessment of overall performance and further optimization of optics for CPV applications.", "proceedingsTitle": "", "conferenceName": "", "publisher": "", "place": "", "date": "2010", "eventPlace": "", "volume": "7725", "issue": "", "numberOfVolumes": "", "pages": "77250A-77250A-6", "series": "", "seriesNumber": "", "DOI": "10.1117/12.854499", "ISBN": "", "citationKey": "", "url": "http://dx.doi.org/10.1117/12.854499", "accessDate": "2016-06-15T15:15:30Z", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Silverchair", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:15:30Z", "dateModified": "2016-06-15T15:15:30Z" } }, { "key": "H63WRCJ7", "version": 9, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/H63WRCJ7", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/H63WRCJ7", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Peharz and Bett", "parsedDate": "2010", "numChildren": 0 }, "data": { "key": "H63WRCJ7", "version": 9, "itemType": "bookSection", "title": "High-Concentration Fresnel Lens Assemblies and Systems", "creators": [ { "creatorType": "author", "firstName": "Gerhard", "lastName": "Peharz" }, { "creatorType": "author", "firstName": "Andreas", "lastName": "Bett" }, { "creatorType": "editor", "firstName": "Lewis", "lastName": "Fraas" }, { "creatorType": "editor", "firstName": "Larry", "lastName": "Partain" } ], "abstractNote": "This chapter contains sections titled:\n\n* Introduction\n* Elements of Fresnel Lens Concentrators\n* Triple-Junction Solar Cells\n* Recent Examples and Developments\n* Assembly of Flatcon Systems\n* Flatcon Systems and Developments\n* Rooftop Applications\n* Summary\n* Abbreviations\n* References", "bookTitle": "Solar Cells and their Applications", "series": "", "seriesNumber": "", "volume": "", "numberOfVolumes": "", "edition": "", "date": "2010", "publisher": "John Wiley & Sons, Inc.", "place": "", "originalDate": "", "originalPublisher": "", "originalPlace": "", "format": "", "pages": "313-335", "ISBN": "978-0-470-63688-6", "DOI": "", "citationKey": "", "url": "http://onlinelibrary.wiley.com/doi/10.1002/9780470636886.ch14/summary", "accessDate": "2016-06-15T15:14:05Z", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "Wiley Online Library", "callNumber": "", "rights": "Copyright © 2010 John Wiley & Sons, Inc.", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:14:05Z", "dateModified": "2016-06-15T15:14:05Z" } }, { "key": "3CSTCK2A", "version": 8, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/3CSTCK2A", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/3CSTCK2A", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Davis", "parsedDate": "2009", "numChildren": 0 }, "data": { "key": "3CSTCK2A", "version": 8, "itemType": "conferencePaper", "title": "Raytrace assisted analytical formulation of Fresnel lens transmission efficiency", "creators": [ { "creatorType": "author", "firstName": "Arthur", "lastName": "Davis" } ], "abstractNote": "In consideration of the broad range of possible Fresnel lens applications, it is desirable to find a fast way of approximating optical performance that is not specific to a particular lens geometry. This is potentially useful for gaining deeper insight into a lens system and affording accelerated development times. Additionally, a Fresnel lens manufactured using a molded polymer process has limitations on how accurately it can replicate a microstructured prismatic pattern. This is especially true at the prismatic peaks of the part where it is more difficult to completely \"fill-out\" the moldbase. Inclusion of this effect in performance evaluation is important. Using transmission efficiency (or transmittance) as the metric, a Fresnel lens model which includes imperfect peak replication is sought. The system description will be parameterized so that the formulations are not specific to a particular geometry and can be generally applied. The parameter space will be explored with raytracing and the results compiled for convenient reference.", "proceedingsTitle": "", "conferenceName": "", "publisher": "", "place": "", "date": "2009", "eventPlace": "", "volume": "7429", "issue": "", "numberOfVolumes": "", "pages": "74290D-74290D-12", "series": "", "seriesNumber": "", "DOI": "10.1117/12.823742", "ISBN": "", "citationKey": "", "url": "http://dx.doi.org/10.1117/12.823742", "accessDate": "2016-06-15T15:03:53Z", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Silverchair", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:03:53Z", "dateModified": "2016-06-15T15:03:53Z" } }, { "key": "SEGAFWBH", "version": 7, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/SEGAFWBH", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/SEGAFWBH", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Zhuang and Yu", "parsedDate": "2014-08", "numChildren": 0 }, "data": { "key": "SEGAFWBH", "version": 7, "itemType": "journalArticle", "title": "Optimization design of hybrid Fresnel-based concentrator for generating uniformity irradiance with the broad solar spectrum", "creators": [ { "creatorType": "author", "firstName": "Zhenfeng", "lastName": "Zhuang" }, { "creatorType": "author", "firstName": "Feihong", "lastName": "Yu" } ], "abstractNote": "This paper presents a novel hybrid Fresnel-based concentrator with improved uniformity irradiance distribution on the solar cell without using secondary optical element (SOE) in the concentrator photovoltaic (CPV) system to overcome the Fresnel loss and to increase the solar cell conversion efficiency. The designed hybrid Fresnel-based concentrator is composed of two parts, the inner part and the outer part. The inner part is the conventional Fresnel lens, while the outer part is double total internal reflection (DTIR) lens. According to the simple geometrical relation, the profile of the proposed hybrid Fresnel-based concentrator is calculated as an initial design profile. To obtain good irradiance uniformity on the solar cell, optimal prism displacements are optimized by using a simplex algorithm for collimated incident sunlight based on different prism focus on different position principles. In addition, a Monte-Carlo ray-tracing simulation approach is utilized to verify the optical performance for the hybrid Fresnel-based concentrator. Results indicate that the hybrid Fresnel-based concentrator designed using this method can achieve spatial non-uniformity less than 16.2%, f-number less than 0.59 (focal length to entry aperture diameter ratio), geometrical concentrator ratio 1759.8×, and acceptance angle ±0.23°. Compared to the conventional Fresnel-based lens and the traditional hybrid Fresnel-based lens, the optimized concentrator yields a significant improvement in irradiance uniformity on the solar cell with a wide solar spectrum range. It also has good tolerance to the incident sunlight.", "publicationTitle": "Optics & Laser Technology", "publisher": "", "place": "", "date": "August 2014", "volume": "60", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "27-33", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Optics & Laser Technology", "DOI": "10.1016/j.optlastec.2013.12.021", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0030399213004799", "accessDate": "2016-06-15T15:03:24Z", "PMID": "", "PMCID": "", "ISSN": "0030-3992", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:03:24Z", "dateModified": "2016-06-15T15:03:24Z" } }, { "key": "FCEMKJ5M", "version": 6, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/FCEMKJ5M", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/FCEMKJ5M", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Al-Ansary et al.", "parsedDate": "2015-06-28", "numChildren": 0 }, "data": { "key": "FCEMKJ5M", "version": 6, "itemType": "journalArticle", "title": "Optical Analysis of a New Point Focus Fresnel Concentrator", "creators": [ { "creatorType": "author", "firstName": "Hany", "lastName": "Al-Ansary" }, { "creatorType": "author", "firstName": "Shaker", "lastName": "Alaqel" }, { "creatorType": "author", "firstName": "Eldwin", "lastName": "Djajadiwinata" }, { "creatorType": "author", "firstName": "Abdullah", "lastName": "Mohammed" } ], "abstractNote": "This study describes preliminary optical analysis performed regarding a new collector called the Point Focus Fresnel Concentrator (PFFC). This collector combines the concepts of the linear Fresnel collector and central receiver systems to form a new concept of a focal point Fresnel concentrator with a dual-axis sun tracking system. It concentrates direct solar radiation using a number of flat mirrors positioned over a rotating frame. The frame tracks the sun in the azimuth direction, while each row of mirrors tracks the sun in the elevation direction, thereby allowing sunlight to be concentrated on the same point above the collector throughout the day. PFFC is considered suitable for a number of applications, such as power generation by concentrating photovoltaics (CPV) and Stirling engines, and process heat applications. In this study, the first attempt to characterize the optical performance of the collector is made. A prototype of the collector has already been built on the campus of King Saud University. It has a total footprint of 9 m2, and includes 900 mirrors, each of which is 7 cm × 7 cm. The receiver has a diameter of 10 cm. Optical performance is studied by ray tracing methods to obtain flux maps and intercept factors of the receiver. Results show that the average concentration ratio is in the order of 220 to 300 suns when mirrors with a 6-mrad optical error are used. For the same mirrors, the highest attainable average intercept factor (0.674) occurs in the winter due to the low particle loading in the atmosphere. When the optical error is reduced to 2 mrad, the average concentration ratio increases to 290 to 400 suns, and the average intercept factor increases to 0.892. In any case, if the current design of PFFC is to be used in conjunction with CPV, a secondary concentrator would be needed to achieve required concentration ratios in the order of 500 suns.", "publicationTitle": "", "publisher": "", "place": "", "date": "June 28, 2015", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "V001T05A008", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1115/ES2015-49340", "citationKey": "", "url": "http://dx.doi.org/10.1115/ES2015-49340", "accessDate": "2016-06-15T15:01:49Z", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Silverchair", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T15:01:49Z", "dateModified": "2016-06-15T15:01:49Z" } }, { "key": "U6SHPH2D", "version": 5, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/U6SHPH2D", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/U6SHPH2D", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Salame et al.", "parsedDate": "2011-01-01", "numChildren": 0 }, "data": { "key": "U6SHPH2D", "version": 5, "itemType": "journalArticle", "title": "Impact of Integrated Clean Energy on the Future of the Mediterranean Environment?A comparative study between parabolic trough collector and linear Fresnel reflector technologies", "creators": [ { "creatorType": "author", "firstName": "Chafic", "lastName": "Salame" }, { "creatorType": "author", "firstName": "Hassan", "lastName": "El Charif" }, { "creatorType": "author", "firstName": "Fouad", "lastName": "El Hajj Hassan" }, { "creatorType": "author", "firstName": "Mario", "lastName": "El Tahchi" }, { "creatorType": "author", "firstName": "Najla El", "lastName": "Gharbi" }, { "creatorType": "author", "firstName": "Halima", "lastName": "Derbal" }, { "creatorType": "author", "firstName": "Sofiane", "lastName": "Bouaichaoui" }, { "creatorType": "author", "firstName": "Noureddine", "lastName": "Said" } ], "abstractNote": "The production of electricity from solar radiation is a direct process. Solar energy is not very dense, it is necessary to concentrate it to produce exploitable temperatures usable for the production of electricity. The radiation may concentrate on a point or on a line, where thermal energy is transferred to the heat transfer fluid. The intensity of concentration is defined by the concentration factor, the more this one is higher, the more reached temperature will be important. In this paper two optical technologies which showed promising results were compared, the first one is the Fresnel mirror and the second one is the parabolic trough. These two technologies are based on linear solar concentration. The main objective of this paper is to report the performance of these technologies by means of numerical analysis. A methodological analysis to design and evaluate the technical feasibility for the use of Fresnel mirror or parabolic trough in a Concentrating Solar Power (CSP) system has been carried out. The influence of ambient conditions and the percent of different types of energy loss, etc., are analyzed. An application on a site, in the south of Algeria (Hassi Rmel), is done. In this site, a project of hybrid natural gas/solar power plant with parabolic trough technology will be inaugurated before 2011.", "publicationTitle": "Energy Procedia", "publisher": "", "place": "", "date": "January 1, 2011", "volume": "6", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "565-572", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Energy Procedia", "DOI": "10.1016/j.egypro.2011.05.065", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S1876610211014767", "accessDate": "2016-06-15T14:56:40Z", "PMID": "", "PMCID": "", "ISSN": "1876-6102", "archive": "", "archiveLocation": "", "shortTitle": "Impact of Integrated Clean Energy on the Future of the Mediterranean Environment?", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T14:56:40Z", "dateModified": "2016-06-15T14:56:40Z" } }, { "key": "7XTU5TCP", "version": 5, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/7XTU5TCP", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/7XTU5TCP", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Abbas et al.", "parsedDate": "2012-02", "numChildren": 0 }, "data": { "key": "7XTU5TCP", "version": 5, "itemType": "journalArticle", "title": "Solar radiation concentration features in Linear Fresnel Reflector arrays", "creators": [ { "creatorType": "author", "firstName": "R.", "lastName": "Abbas" }, { "creatorType": "author", "firstName": "M. J.", "lastName": "Montes" }, { "creatorType": "author", "firstName": "M.", "lastName": "Piera" }, { "creatorType": "author", "firstName": "J. M.", "lastName": "Martínez-Val" } ], "abstractNote": "This paper is aimed at characterizing the concentration process for LFRs, and to analyze the use of different optical designs, including circular-cylindrical and parabolic-cylindrical mirrors with different reference positions. A new approach to analyze and optimize the performance of Fresnel arrays is presented, which is based on a newly formulated optical property that can be used to evaluate the drift of the reflected sunbeams from the mirrors as they rotate to follow the sun. This new optical-geometric property sets upper bounds for the deviation of the reflected sunbeams, in relation to trajectories of the reference situation. It is observed that the maximum deviation depends on the width of the mirror, which must be limited for maximizing the optical efficiency. From this theory an optical design process is suggested to minimize such lateral drifts and to minimize the concentration factor variation along the day. A new mirror layout is defined for keeping a constant value of the radiation impinging onto the receiver from effective sunrise to effective sunset.", "publicationTitle": "Energy Conversion and Management", "publisher": "", "place": "", "date": "February 2012", "volume": "54", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "133-144", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Energy Conversion and Management", "DOI": "10.1016/j.enconman.2011.10.010", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0196890411002743", "accessDate": "2016-06-15T14:56:29Z", "PMID": "", "PMCID": "", "ISSN": "0196-8904", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T14:56:29Z", "dateModified": "2016-06-15T14:56:29Z" } }, { "key": "N6R3S9GR", "version": 4, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/N6R3S9GR", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/N6R3S9GR", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Nixon and Davies", "parsedDate": "2012-01", "numChildren": 0 }, "data": { "key": "N6R3S9GR", "version": 4, "itemType": "journalArticle", "title": "Cost-exergy optimisation of linear Fresnel reflectors", "creators": [ { "creatorType": "author", "firstName": "J. D.", "lastName": "Nixon" }, { "creatorType": "author", "firstName": "P. A.", "lastName": "Davies" } ], "abstractNote": "This paper presents a new method for the optimisation of the mirror element spacing arrangement and operating temperature of linear Fresnel reflectors (LFR). The specific objective is to maximise available power output (i.e. exergy) and operational hours whilst minimising cost. The method is described in detail and compared to an existing design method prominent in the literature. Results are given in terms of the exergy per total mirror area (W/m2) and cost per exergy (US $/W). The new method is applied principally to the optimisation of an LFR in Gujarat, India, for which cost data have been gathered. It is recommended to use a spacing arrangement such that the onset of shadowing among mirror elements occurs at a transversal angle of 45°. This results in a cost per exergy of 2.3 $/W. Compared to the existing design approach, the exergy averaged over the year is increased by 9% to 50 W/m2 and an additional 122 h of operation per year are predicted. The ideal operating temperature at the surface of the absorber tubes is found to be 300 °C. It is concluded that the new method is an improvement over existing techniques and a significant tool for any future design work on LFR systems.", "publicationTitle": "Solar Energy", "publisher": "", "place": "", "date": "January 2012", "volume": "86", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "147-156", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Solar Energy", "DOI": "10.1016/j.solener.2011.09.024", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0038092X11003501", "accessDate": "2016-06-15T14:55:59Z", "PMID": "", "PMCID": "", "ISSN": "0038-092X", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T14:55:59Z", "dateModified": "2016-06-15T14:55:59Z" } }, { "key": "RVT7P4IC", "version": 3, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/RVT7P4IC", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/RVT7P4IC", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Salame et al.", "parsedDate": "2011-01-01", "numChildren": 0 }, "data": { "key": "RVT7P4IC", "version": 3, "itemType": "journalArticle", "title": "Impact of Integrated Clean Energy on the Future of the Mediterranean Environment?A comparative study between parabolic trough collector and linear Fresnel reflector technologies", "creators": [ { "creatorType": "author", "firstName": "Chafic", "lastName": "Salame" }, { "creatorType": "author", "firstName": "Hassan", "lastName": "El Charif" }, { "creatorType": "author", "firstName": "Fouad", "lastName": "El Hajj Hassan" }, { "creatorType": "author", "firstName": "Mario", "lastName": "El Tahchi" }, { "creatorType": "author", "firstName": "Najla El", "lastName": "Gharbi" }, { "creatorType": "author", "firstName": "Halima", "lastName": "Derbal" }, { "creatorType": "author", "firstName": "Sofiane", "lastName": "Bouaichaoui" }, { "creatorType": "author", "firstName": "Noureddine", "lastName": "Said" } ], "abstractNote": "The production of electricity from solar radiation is a direct process. Solar energy is not very dense, it is necessary to concentrate it to produce exploitable temperatures usable for the production of electricity. The radiation may concentrate on a point or on a line, where thermal energy is transferred to the heat transfer fluid. The intensity of concentration is defined by the concentration factor, the more this one is higher, the more reached temperature will be important. In this paper two optical technologies which showed promising results were compared, the first one is the Fresnel mirror and the second one is the parabolic trough. These two technologies are based on linear solar concentration. The main objective of this paper is to report the performance of these technologies by means of numerical analysis. A methodological analysis to design and evaluate the technical feasibility for the use of Fresnel mirror or parabolic trough in a Concentrating Solar Power (CSP) system has been carried out. The influence of ambient conditions and the percent of different types of energy loss, etc., are analyzed. An application on a site, in the south of Algeria (Hassi Rmel), is done. In this site, a project of hybrid natural gas/solar power plant with parabolic trough technology will be inaugurated before 2011.", "publicationTitle": "Energy Procedia", "publisher": "", "place": "", "date": "January 1, 2011", "volume": "6", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "565-572", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Energy Procedia", "DOI": "10.1016/j.egypro.2011.05.065", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S1876610211014767", "accessDate": "2016-06-15T14:44:12Z", "PMID": "", "PMCID": "", "ISSN": "1876-6102", "archive": "", "archiveLocation": "", "shortTitle": "Impact of Integrated Clean Energy on the Future of the Mediterranean Environment?", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T14:44:12Z", "dateModified": "2016-06-15T14:44:12Z" } }, { "key": "EF6F23TD", "version": 2, "library": { "type": "group", "id": 563999, "name": "Fresnel_collectors", "links": { "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/563999/items/EF6F23TD", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/fresnel_collectors/items/EF6F23TD", "type": "text/html" } }, "meta": { "createdByUser": { "id": 250494, "username": "tsandberg", "name": "Tami Sandberg", "links": { "alternate": { "href": "https://www.zotero.org/tsandberg", "type": "text/html" } } }, "creatorSummary": "Morin et al.", "parsedDate": "2012-01", "numChildren": 0 }, "data": { "key": "EF6F23TD", "version": 2, "itemType": "journalArticle", "title": "Comparison of Linear Fresnel and Parabolic Trough Collector power plants", "creators": [ { "creatorType": "author", "firstName": "Gabriel", "lastName": "Morin" }, { "creatorType": "author", "firstName": "Jürgen", "lastName": "Dersch" }, { "creatorType": "author", "firstName": "Werner", "lastName": "Platzer" }, { "creatorType": "author", "firstName": "Markus", "lastName": "Eck" }, { "creatorType": "author", "firstName": "Andreas", "lastName": "Häberle" } ], "abstractNote": "The Linear Fresnel Collector (LFC) technology is currently being commercialised by several companies for the application in solar thermal power plants. This study compares the electricity generation costs for LFC and Parabolic Trough Collector (PTC). PTC is the most commercial CSP technology to date and is therefore regarded as the benchmark. For reasons of comparability, direct steam generation is assumed for both LFC and PTC.\n\nFor the LFC, cost data comparable to typical CSP plant sizes are hardly available. Therefore, the break even cost – referring to aperture-specific collector investment – is determined, where cost-parity of the electricity generation with a PTC reference plant is reached.\n\nThis study varies the assumptions on collector performance and operation and maintenance costs to reflect different designs of LFC technologies. The calculations were carried out using cost and hourly simulation performance models. Depending on the assumptions, the costs for a linear Fresnel collector solar field should range between 78 and 216 €/m2 to reach cost-parity at assumed reference solar field costs of 275 €/m2 for the PTC.\n\nThe LFC principle of arranging the mirrors horizontally leads to lower aperture-related optical efficiency which must be compensated by lower cost per m2 of aperture compared to PTC. The LFC is a collector with significant cost reduction potential, mainly due to cheaper mirrors and structural advantages.The presented cost and performance targets shown in this study must be met by LFC technology developers to reach the PTC benchmark.", "publicationTitle": "Solar Energy", "publisher": "", "place": "", "date": "January 2012", "volume": "86", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "1-12", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Solar Energy", "DOI": "10.1016/j.solener.2011.06.020", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0038092X11002325", "accessDate": "2016-06-15T14:39:28Z", "PMID": "", "PMCID": "", "ISSN": "0038-092X", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2016-06-15T14:39:28Z", "dateModified": "2016-06-15T14:39:28Z" } } ]