Study On The Comprehensive Performance Of Translucent Thin Film PV Curtain Wall Based On Daylighting Standard

With the urgent demand for building energy conservation and the promotion of the concept of photovoltaic building integration,the application of photovoltaic materials in buildings is becoming more and more common.The existing high-rise office buildings are characterized by a large quantity and large energy consumption,and a large number of glass curtain walls are used for facade design.Therefore,they provide a broad prospect for the application of photovoltaic glass.As a new type of building material,the optical thermal performance of translucent thin-film photovoltaic glass is different from that of traditional crystalline silicon photovoltaic glass,and its effect on the indoor light and heat environment is also different.Based on the above background,this article focuses on exploring the influence laws and optimization schemes of the translucent thin film photovoltaic curtain wall when applied to high-rise office buildings in Wuhan,and aims to provide reference for the design of photovoltaic curtain walls.The main research content is divided into the following aspects:First,the status quo of the development of translucent photovoltaic curtain wall is reviewed.The technical principles,market overview and related parameters of various types of thin-film photovoltaic cells have been analyzed through literature review and field investigations;the structural types,product specifications and appearance characteristics of thin-film photovoltaic glass have been introduced separately,while the selection of existing curtain wall structures has been carried out Summarizing and collating;collecting a large number of existing thin film photovoltaic curtain wall cases,to provide practical application basis for this study.Then,the experimental measurement and simulation analysis of the indoor light environment of translucent thin film photovoltaic glass with several typical light transmittance were carried out,and their applicability in office buildings was proposed.Color temperature and color rendering index were used to quantitatively evaluate the influence of several different color characteristics of thin film photovoltaic glass on the indoor light color environment.It was proposed that gray primary color photovoltaic glass is more suitable for office space with high requirement for color identification;the adoption of illumination and all natural lighting Quantitative analysis of the time percentage of the two evaluation indicators obtained under different orientations of the curtain wall to meet the natural light conditions when the photovoltaic transmittance requirements range,and proposed the use of translucent thin film photovoltaic glass and traditional hollow glass combined to achieve indoor light environment requirements.Secondly,the effects of several application forms of traditional glass replacement thin film photovoltaic glass on the indoor light environment were analyzed,and an optimized alternative scheme was obtained.Several typical alternatives are extracted through existing cases,the percentage of all natural daylighting time is used to evaluate the influence of the same replacement rate on indoor light environment in different orientations,and the basic requirements for indoor light environment under different working conditions are obtained by interpolation.The replacement rate meets the requirements of the ideal light environment.According to the analysis,under the condition of the same light environment,the area of the photovoltaic glass to be replaced under the longitudinal centering replacement mode is the least,which provides reference for the optimization of the architectural design application plan.Thirdly,the effects of different replacement ratios on indoor energy consumption are analyzed when three types of transmissivity thin-film PV glass adopt longitudinal centering replacement in different orientations.The results show that with the increase of the exchange rate of hollow glass,the comprehensive energy consumption in the room has a linear growth trend.Finally,comprehensively considering the influence laws of indoor light environment and comprehensive energy consumption,an optimization application scheme was proposed,and the energy consumption,power generation,and relative power consumption of air-conditioning systems with different light transmittance requirements in different orientations were compared and analyzed.The energy-saving rate of traditional hollow glass curtain walls has led to suggestions for the selection of photovoltaic materials,providing data and theoretical support for the design of photovoltaic curtain walls.