Active cooling of low-concentrating hybrid PV/Thermal collectors

Document identifier: oai:dalea.du.se:2138
Publication year: 1999
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Abstract:

A series of measurements on the performance of solar cell string modules with low-concentrating CPC reflectors with a concentration factor C ˜ 4X have been carried out. To minimise the reduction in efficiency due to high cell temperatures, the modules were cooled. Four different way of cooling were tested: 1) The thermal mass of the module was increased, 2) passive air cooling was used by introducing a small air gap between the module and the reflector, 3) the PV cells were cooled by a large cooling fin, 4) the module was actively cooled by circulating cold water on the back. The best performance was given with the actively cooled PV module which gave 2,2 times the output from a reference module while for the output from the module with a cooling fin the value was 1,8. Active cooling is also interesting due to the possibility of co-generation of thermal and electrical energy which is discussed in the paper. Simulations, based on climate data from Stockholm, latitude 59.4°N, show that there are good prospects for producing useful temperatures of the cooling fluid with only a slightly reduced performance of the electrical fraction of the PV thermal hybrid system.

Authors

Mats Rönnelid

Högskolan Dalarna; Miljöteknik
Other publications >>

Bengt Perers

Other publications >>

Peter Krohn

Other publications >>

Lennart Spante

Other publications >>

Björn Karlsson

Other publications >>

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        identifier: oai:dalea.du.se:2138
        datestamp: 2021-04-15T12:26:01Z
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                recordContentSource: du
                recordCreationDate: 2006-05-29
            identifier: http://urn.kb.se/resolve?urn=urn:nbn:se:du-2138
            titleInfo: 
                @attributes: 
                    lang: eng
                title: Active cooling of low-concentrating hybrid PV/Thermal collectors
            abstract: 
A series of measurements on the performance of solar cell string modules with low-concentrating CPC reflectors with a concentration factor C ˜ 4X have been carried out. To minimise the reduction in efficiency due to high cell temperatures the modules were cooled. Four different way of cooling were tested:\n1) The thermal mass of the module was increased 2) passive air cooling was used by introducing a small air gap between the module and the reflector 3) the PV cells were cooled by a large cooling fin 4) the module was actively cooled by circulating cold water on the back. The best performance was given with the actively cooled PV module which gave 22 times the output from a reference module while for the output from the module with a cooling fin the value was 18.\n\nActive cooling is also interesting due to the possibility of co-generation of thermal and electrical energy which is discussed in the paper. Simulations based on climate data from Stockholm latitude 59.4°N show that there are good prospects for producing useful temperatures of the cooling fluid with only a slightly reduced performance of the electrical fraction of the PV thermal hybrid system.

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                languageTerm: eng
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                Published
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                        Rönnelid
                        Mats
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                        roleTerm: aut
                    affiliation: 
                        Högskolan Dalarna
                        Miljöteknik
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                        Perers
                        Bengt
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                        Krohn
                        Peter
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                        Spante
                        Lennart
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                        Karlsson
                        Björn
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                dateIssued: 1999
                place: 
                    placeTerm: Edmonton Canada
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                    title: North Sun 
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                    url: http://du.diva-portal.org/smash/get/diva2:521622/FULLTEXT01.pdf
                    url: http://du.diva-portal.org/smash/get/diva2:521622/FULLTEXT02.pdf
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