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Modeling the thermal runaway effect in CPV modules

 
: Steiner, M.; Siefer, G.; Bett, A.W.

:
Postprint urn:nbn:de:0011-n-2799857 (314 KByte PDF)
MD5 Fingerprint: df15821e915d3ebcfa080bcb75bb1ece
Copyright AIP
Erstellt am: 1.5.2015


Dimroth, F. ; American Institute of Physics -AIP-, New York:
9th International Conference on Concentrator Photovoltaic Systems, CPV 2013 : 15–17 April 2013, Miyazaki, Japan
New York, N.Y.: AIP Press, 2013 (AIP Conference Proceedings 1556)
ISBN: 978-0-7354-1182-1
S.230-233
International Conference on Concentrator Photovoltaic Systems (CPV) <9, 2013, Miyazaki>
Englisch
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISE ()
Materialien - Solarzellen und Technologie; III-V und Konzentrator-Photovoltaik; Alternative Photovoltaik-Technologien; Konzentrator-Bauelemente; Konzentratorsysteme; Module

Abstract
In this work current injections into solar cells due to parallel connection within CPV modules are investigated. A current injection into a solar cell increases its temperature. If the current injection is above a certain threshold a thermal runaway is started. The current injection into a solar cell is limited by the short circuit current generated by a string of parallel connected cells. The value of the short circuit current is determined by the number of cells in parallel and by the concentration factor of sun light used in the CPV module. In this work the value of current injection is calculated above which a thermal runaway is triggered. For these calculations a model is introduced and tested with an experimental setup. The model shows a satisfying agreement with the measurement. The model is used to calculate the maximum number of solar cells for which the temperature increase due to current injection is limited to 20 K and a thermal runaway is prevented. This maximum number is presented in dependence of the concentration factor of sun light.

: http://publica.fraunhofer.de/dokumente/N-279985.html