|Publication type:||Conference paper|
|Type of review:||Not specified|
|Title:||Performance analysis of PV green roof systems|
|Proceedings:||32nd European Photovoltaic Solar Energy Conference and Exhibition|
|Conference details:||32nd European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2016), Munich, Germany, 20-24 June 2016|
|Publisher / Ed. Institution:||Curran Associates|
|Subjects:||Thermal Performance; Green Roof; PV System; System Performance|
|Abstract:||The common assumption is that plants underneath PV modules will cause a cooling effect resulting in a higher energy yield due to the negative temperature coefficient of PV power. The PV module temperature is measured to verify this thesis on a flat roof PV plant in Winterthur, Switzerland. Thirteen different mounting test field types with two different mechanical PV mounting systems are used, 20° or 15° tilted angles. Each type of mechanical mounting system is combined with planting beneath and with and without irrigation in the different test fields. The difference of the module temperatures, weighted according to the energy production, of all 13 analysed test fields is between ± 1.8°C. This temperature difference results in a calculated energy yield difference of about ± 0.7% for the used crystalline silicon modules. This value is in the range of the measurement uncertainty of the power measurement (± 1.2%). Therefore the green roof has only negligible influence on the temperature reduction of the PV modules on the base of the used system components. However, a combination of PV and green roof is absolutely doable and recommendable provided that the mounting system is optimized for green roofs. Other more powerful benefits of such combination of green roofs and PV are the improvement of water retention in the city.|
|Fulltext version:||Published version|
|License (according to publishing contract):||Licence according to publishing contract|
|Departement:||School of Engineering|
|Organisational Unit:||Institute of Energy Systems and Fluid Engineering (IEFE)|
|Appears in collections:||Publikationen School of Engineering|
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