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Development of a hybrid MaReCo solar collector; Utveckling av Hybrid MaReCo Solfaangare

Technical Report:

Abstract

The Swedish company Solarus has developed a bifacial hybrid absorber which delivers both heat and electricity. It consists of a water cooled fin with solar cells on both sides. This is used in their concentrating MaReCo-collector. This concentrating and non tracking hybrid was installed on the solar laboratory at Lund Univ. for long term testing. Its thermal performance was compared with the performance of the corresponding thermal absorber. The results show that the reference and the hybrid collector have comparable optical efficiencies of around 0,60. The heat loss factor is characteristically higher for the hybrid, since this is not equipped with a selective surface like the absorber in the reference collector. The high value of the heat loss factor is partly an advantage since it limits the stagnation temperature. It also means that the hybrid should preferably be used in low temperature applications, which will favor both the electrical and thermal performance. A measurement system for simultaneous registration of the IV-curves of the front and backside cells is developed. The results of the electrical measurements show that the front side solar cells work as expected with a high efficiency. The backside module has an acceptable performance when the solar azimuth  More>>
Publication Date:
Feb 15, 2011
Product Type:
Technical Report
Report Number:
ELFORSK-11-14
Resource Relation:
Other Information: 24 figs., 2 tabs.
Subject:
14 SOLAR ENERGY; CONCENTRATING COLLECTORS; SWEDEN; PHOTOVOLTAIC CELLS; COST; COMBINED COLLECTORS; SOLAR HEATING; FINS; PERFORMANCE
OSTI ID:
1010789
Research Organizations:
Elforsk AB, Stockholm (Sweden)
Country of Origin:
Sweden
Language:
Swedish
Other Identifying Numbers:
TRN: SE1107059
Availability:
Available from: Elforsk AB, SE-10153 Stockholm, Sweden, E-mail: kontakt @elforsk.se or from homepage: http://www.elforsk.se
Submitting Site:
SWD
Size:
28 p. pages
Announcement Date:
Apr 11, 2011

Technical Report:

Citation Formats

Gomes, Joao, Stenlund, Niclas, Larsson, Stefan, and Karlson, Bjoern. Development of a hybrid MaReCo solar collector; Utveckling av Hybrid MaReCo Solfaangare. Sweden: N. p., 2011. Web.
Gomes, Joao, Stenlund, Niclas, Larsson, Stefan, & Karlson, Bjoern. Development of a hybrid MaReCo solar collector; Utveckling av Hybrid MaReCo Solfaangare. Sweden.
Gomes, Joao, Stenlund, Niclas, Larsson, Stefan, and Karlson, Bjoern. 2011. "Development of a hybrid MaReCo solar collector; Utveckling av Hybrid MaReCo Solfaangare." Sweden.
@misc{etde_1010789,
title = {Development of a hybrid MaReCo solar collector; Utveckling av Hybrid MaReCo Solfaangare}
author = {Gomes, Joao, Stenlund, Niclas, Larsson, Stefan, and Karlson, Bjoern}
abstractNote = {The Swedish company Solarus has developed a bifacial hybrid absorber which delivers both heat and electricity. It consists of a water cooled fin with solar cells on both sides. This is used in their concentrating MaReCo-collector. This concentrating and non tracking hybrid was installed on the solar laboratory at Lund Univ. for long term testing. Its thermal performance was compared with the performance of the corresponding thermal absorber. The results show that the reference and the hybrid collector have comparable optical efficiencies of around 0,60. The heat loss factor is characteristically higher for the hybrid, since this is not equipped with a selective surface like the absorber in the reference collector. The high value of the heat loss factor is partly an advantage since it limits the stagnation temperature. It also means that the hybrid should preferably be used in low temperature applications, which will favor both the electrical and thermal performance. A measurement system for simultaneous registration of the IV-curves of the front and backside cells is developed. The results of the electrical measurements show that the front side solar cells work as expected with a high efficiency. The backside module has an acceptable performance when the solar azimuth angular is zero, i.e. when the sun is in the south direction. For higher azimuth angles the gables of the through will shadow the reflector and prevent illumination of the bottom cells, which are close to the gables. This means that the electrical performance of the backside cells will be drastically lowered. These effects can be limited if by pass diodes are connected or if the cells close to the gables are omitted. Solarus solar collector is already an commercial product. The company Solarus is now establishing an industrial production of the hybrid absorber and the hybrid collector. It is crucial for the competition with conventional products on the market that the hybrid absorber is produced for around 25 kr/Wp (about 4 USD/Wp)}
place = {Sweden}
year = {2011}
month = {Feb}
}