Paper Conference

Proceedings of BauSim Conference 2008: 2nd Conference of IBPSA-Germany and Austria


Ökologische Betrachtung von Photovoltaikapplikation für den Baubereich

Michael Held, Stefan Albrecht, Bastian Wittstock

Abstract: The photovoltaic industry is a fast and continuously growing market. Especially the German demand on photovoltaic power generation is increasing. This is also the case for the building sector where photovoltaic applications are getting more and more interesting. Besides common roof top mounted photovoltaic installations, there is a growing demand on building integrated photovoltaic installations (BIPV) to implement functions into facades. The facade integration is still in development and their profitable application is not clarified yet. Besides the nowadays wide spread conventional silicon solar modules (mainly mono- and polycrystalline silicon m-Si and p-Si) thin film technologies are in advance. A market share of about 20 % for thin film solar modules is forecasted for the year 2020. Amorphic silicon (a-Si), copper indium di-selenide (CIS) and Cadmium Telluride (CdTe) are the most common thin film solar modules. Main advantages of thin film technologies are higher efficiency rates that lead to a reduction of the Energy Payback Time (EPBT) of the solar modules. The Chair of Building Physics (LBP) was part of the SENSE project, carrying out a Life Cycle Assessment study (LCA) in order to evaluate the environmental profiles of thin film solar modules. Furthermore different utilization scenarios concerning different installation types and solar irradiations were carried out to evaluate their dependence on the EPBT of solar modules. The presentation will give an overview over the LCA results for the considered Thin-film solar modules and will compare these results to conventional energy carriers. Furthermore it will present the main characteristics of the EU FP7 “cost effective” project that addresses the economy aspects of photovoltaic applications.
Pages: 41 - 41