Study On Performance Optimization Of New Thin-film Photovoltaic Window

At present,the cross application of green building and renewable energy utilization has become the focus of common attention at home and abroad.China has embarked on the road of high-quality development and large-scale promotion of green buildings has been put on the agenda,but the proportion of building energy consumption in the total annual energy consumption in China remains high.With the rapid development of the photovoltaic industry,people are not only limited to the combination of photovoltaic modules and roof,and began to apply photovoltaic modules in Windows,curtain walls,sunshades and other aspects,providing a variety of development directions for the integration of photovoltaic buildings.The application of the combination of thin-film photovoltaic and exterior Windows of buildings not only achieves the effect of power generation,but also plays a role in building energy saving and maintaining the appearance of buildings.However,China has complex geographical features and diverse climatic conditions,and the energy saving effect of thin-film photovoltaic Windows varies significantly in different climatic areas.Therefore,the design of thin-film photovoltaic Windows in different climatic areas should be adapted to local conditions,which is the key to building energy saving.Energy Plus software simulation method,this article USES five kinds of thin film photovoltaic modules has been designed,outside the window,to simulate and analyze the new thin film photovoltaic window in our country,five kinds of typical energy consumption under different building factors,climate conditions and the five kinds of typical climates outside window radiation throughout the year and the year outside the window surface temperature was studied,the specific conclusions are as follows:(1)In terms of orientation and window-wall ratio,under certain window-wall ratio,except for hot summer and warm winter regions,the most favorable orientation and the optimal external window of thin-film photovoltaic module combination are northward and PV1,respectively,the other four climate regions are southward and PV2,respectively.Under the condition of certain orientation,the most favorable conditions for cold area and mild area should be 0.4 window-wall ratio and PV1 as the optimal combination of thin-film photovoltaic modules for external Windows.In cold regions,hot summer and cold winter regions and hot summer and warm winter regions,external Windows of the most energy-saving thin-film photovoltaic modules are all PV2,but the optimal window-wall ratios of these three regions are 0.4,0.6 and 0.5,respectively.(2)In terms of power generation performance: temperature is one of the important influencing factors of photovoltaic power generation.The annual high temperature moment in cold,cold and mild regions does not exceed 5% of the annual time,while the annual high temperature moment in hot summer and cold winter regions and hot summer and warm winter regions is less than 7% of the annual time.Therefore,compared with hot summer and cold winter regions and hot summer and warm winter regions,temperature has less influence on the power generation performance of photovoltaic Windows in cold,cold and mild regions.(3)Comparison between new thin-film photovoltaic Windows and traditional glass Windows: except for the low-E glass Windows in hot summer and cold winter areas,the comprehensive performance of the low-E glass Windows is better than that of other glass Windows,the energy-saving performance of the most favorable thin-film photovoltaic module Windows selected in the other four typical climate areas is better than that of ordinary insulating glass and low-E glass,which has the potential to replace the use of.