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dc.contributor.authorStalcup, Thomas*
dc.contributor.authorAngel, Roger*
dc.contributor.authorStrittmatter, Peter*
dc.contributor.authorWhiteside, Andy*
dc.contributor.authorGeary, Andrew*
dc.contributor.authorSodari, Frank*
dc.contributor.authorRademacher, Matt*
dc.contributor.authorDidato, Nick*
dc.contributor.authorAyala, Silvana*
dc.date.accessioned2017-03-10T22:48:10Z
dc.date.available2017-03-10T22:48:10Z
dc.date.issued2016
dc.identifier.citationAIP Conference Proceedings 1766, 020006 (2016); doi: 10.1063/1.4962074en
dc.identifier.issn0094-243X
dc.identifier.doi10.1063/1.4962074
dc.identifier.urihttp://hdl.handle.net/10150/622800
dc.description.abstractA REhnu CPV module uses a 2.6 m(2), back-silvered glass reflector to focus sunlight into a 150 mm diameter receiver housing 36 multijunction cells. Current modules use commercially available 8.8 mm cells operated at 950x concentration with a cell efficiency of 41% for an AM1.5 solar spectrum. Optics in the receiver format the sunlight to illuminate the cells which are mounted slightly apart on four flat circuit boards. Active cooling is provided by liquid circulated to a radiator which can easily be configured to also provide thermal energy in the form of hot fluid at an adjustable temperature up to 80 degrees C. Modules mounted in pairs on a dual axis tracker have been tested in the field. Module conversion efficiency, corrected to 25 degrees C cell temperature (CSTC), is found to peak at 31.2% for air mass 2.75. The I-V curve shows that the concentrated sunlight is distributed between the cells with a uniformity of +/-7%. Steps are now being taken to improve uniformity, to reduce infrared losses caused by iron absorption in the reflector glass and by the receiver's antireflection coatings, and to upgrade to 42% efficient cells. Overall efficiency is projected to then increase to 35%. In hybrid mode (electrical + thermal) the total efficiency approaches 80%. REhnu's basic generator unit to be replicated for large scale installations has eight modules in a 2 x 4 array on a dual axis tracker. The first of these 6 kW units with mirrors of very low iron absorption glass has now been installed in the field, and 16 more units are under construction for a 100 kW, grid-connected plant at the Solar Zone of the University of Arizona Tech Park.
dc.language.isoenen
dc.publisherAMER INST PHYSICSen
dc.relation.urlhttp://aip.scitation.org/doi/abs/10.1063/1.4962074en
dc.rightsPublished by the American Institute of Physicsen
dc.titleREhnu dish-based CPV: Module performance and planned 100 kW planten
dc.typeProceedingsen
dc.contributor.departmentUniv Arizona, Steward Observen
dc.identifier.journal12TH INTERNATIONAL CONFERENCE ON CONCENTRATOR PHOTOVOLTAIC SYSTEMS (CPV-12)en
dc.description.note12 month embargo; Published Online: September 2016en
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2017-10-01T00:00:00Z
html.description.abstractA REhnu CPV module uses a 2.6 m(2), back-silvered glass reflector to focus sunlight into a 150 mm diameter receiver housing 36 multijunction cells. Current modules use commercially available 8.8 mm cells operated at 950x concentration with a cell efficiency of 41% for an AM1.5 solar spectrum. Optics in the receiver format the sunlight to illuminate the cells which are mounted slightly apart on four flat circuit boards. Active cooling is provided by liquid circulated to a radiator which can easily be configured to also provide thermal energy in the form of hot fluid at an adjustable temperature up to 80 degrees C. Modules mounted in pairs on a dual axis tracker have been tested in the field. Module conversion efficiency, corrected to 25 degrees C cell temperature (CSTC), is found to peak at 31.2% for air mass 2.75. The I-V curve shows that the concentrated sunlight is distributed between the cells with a uniformity of +/-7%. Steps are now being taken to improve uniformity, to reduce infrared losses caused by iron absorption in the reflector glass and by the receiver's antireflection coatings, and to upgrade to 42% efficient cells. Overall efficiency is projected to then increase to 35%. In hybrid mode (electrical + thermal) the total efficiency approaches 80%. REhnu's basic generator unit to be replicated for large scale installations has eight modules in a 2 x 4 array on a dual axis tracker. The first of these 6 kW units with mirrors of very low iron absorption glass has now been installed in the field, and 16 more units are under construction for a 100 kW, grid-connected plant at the Solar Zone of the University of Arizona Tech Park.


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