Environmental Effects Investigating For The Grid-connected BAPV

Solar energy is one of renewable energy with clean and efficient characteristics. Beinga worldwide choice to alternative energy, Photovoltaic Generation, utilizing solarenergy, has meet the technical and economic requirements for large-scale applicationafter rapid development in recent decades. Because of the development of sustainablebuilding and PV system integrated into building system easily, Grid-connectedBuilding-attached Photovoltaics (BAPV) is widely used, resulting in not onlysupplying enough energy for the operation of buildings but also being crucial role inoptimizing word energy structure. The industry scale of PV system in our country hasreached the international leading-position currently. However, as an emerging industry,it is necessary for PV system to demonstrate its operation efficiency and theenvironmental impacts caused by generation.Through life-cycle technology, this paper presents a systematic study ongrid-connected BAPV from production of materials to waste recovery, as well as acomplete list of BAPV. A model for life cycle of grid-connected BAPV based onendpoint damage is established with its potential environmental impact quantified. InTianjin, the range of energy pay-back time is3-6years for1kWpBAPV installed indifferent positions with energy return index and net electric generation in the wholelife cycle being4-8and10135-23027kWh respectively, achieving better economiceffectiveness. Simultaneously, compared with the environmental effects of the coalsystem, Grid-connected BAPV superior to the coal system with the minor limitationon environment to generate the same amount of electricity.