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Evaluation of Different Module Designs and Determination of Different Physical Loss Mechanisms by Means of a Practical Multi-Physic Model

 
: Hanifi, Hamed; Schneider, Jens

:

Verlinden, P. ; WIP - Renewable Energies, München:
35th European Photovoltaic Solar Energy Conference and Exhibition 2018 : Proceedings of the international conference held in Brussels, Belgium, 24 September-28 September 2018; DVD-ROM
München: WIP, 2018
ISBN: 978-3-936338-50-8
ISBN: 3-936338-50-7
pp.197-202
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <35, 2018, Brussels>
English
Conference Paper
Fraunhofer IMWS ()

Abstract
Incident light on solar modules is either lost in reflection or heat generation or generates desired electricity. In this work, we introduce and extended evaluation of PV modules by means of simulation and measurements and quantify optical reflection losses, heat sources and electricity values in PV modules with different bill of materials based on the material stack level. We introduce our optical and electrical loss analysis model which evaluates PV modules in spectral dependent optical and voltage dependent electrical analysis which can be used for any defined spectrums in any location in the word. We show that almost 75% of the incoming incident light turns into heat sources with different loss mechanism while 7% to 10% of incoming light can be reflected out of the stack. We also show that modules with anti-reflection coating can benefit about 2-4%rel. extra efficiency compared to the modules with similar glass and no AR properties. The reduced reflection in glass level increases the efficiency as well as the heat sources of the module. The Module with UV+ polymer (Polyvinylbutyral, PVB) shows a low UV (Ultraviolet) absorption in the polymer in UV range and decreases the degradation effects such as discoloration. Furthermore, modules with PVB encapsulation materials show about 2.5% extra electricity generation in module level compared to the similar module with encapsulant without UV+ properties (ethylene vinyl acetate, EVA).

: http://publica.fraunhofer.de/documents/N-585345.html