Research On Overall Energy Performance Of Semi-transparent PV Fa?ade In Five Climate Zone Of China

Owning to an increasing acceptance of energy conservation and emissions reduction,utilizing renewable energy as an important approach to support our energy supply has been widely discussed in recent years.Buildings are responsible for a major part of our energy consumption,for which the concept of developing green and low-carbon buildings has been well accepted by architects.Among many energy-efficient technologies,Building integrated Photovoltaic(BIPV)has gone through a rapid development for the past decade due to its wide applicability.The semi-transparent PV Fa?ade is one great opportunity promote the development of BIPV to a even higher level.It will make the lighting and landscape of buildings possible view and affects the building lighting,air conditioning and refrigeration and heating energy consumption in power at the same time.In consideration of the significant impact of climate factors on building energy performance and PV electricity generation,How to optimize the design,especially the design of different climatic conditions is the key to the building overall energy performance.This research focuses on the overall energy performance and application of the semitransparent PV Fa?ade on five typical climate zone.Combining climate and the different factors of buildings,the overall energy performance of building integrated semi-transparent PV Fa?ade was studied,and the results are compared with the traditional glass,to find semitransparent PV Fa?ade potential to replace the traditional ones.On the basis of this,the design optimization strategy for the design of semi-transparent Fa?ade was established.This research mainly uses field experiment and computational simulation method.The power calculation model and thermal model are developed and validated by field experiments with the help of Huazhong university of science and technology pv build.Then import the simulation software(Energy Plus)combined with the typical architecture to simulate the energy performance of semi-transparent PV Fa?ade and traditional glass(single white glass,double-layer vacuum glass and double Low-e glass in different architectural factors on five typical climate zone.Finally,get the conclusion by contrastive analysis and sensitivity analysis.Through the above research,the conclusion included design optimization strategy and suitability design strategy.Specific conclusions are as follows:(1)On the optimal design choices: In view of the toward,except for hot summer and warm winter region is north,the rest of the climate zones are south,namely except hot summer and warm winter region very nearly the same,the rest should first choose south when semi-transparent PV Fa?ade application;In view of the window-wall ratio,cold region,hot summer and cold winter region,hot summer and warm winter region south are 0.45 of the optimal window wall ratio,Severe cold region is 0.3,Moderate region is 0.7,which should be preferred when Architectural design.(2)On the building sensitivity: In view of the toward,Cold region>Severe cold region and Moderate region>hot summer and cold winter region and hot summer and warm winter region;In view of the ratio of window to wall,Cold region>hot summer and cold winter region 、 hot summer and warm winter 、 Moderate region > Severe cold region,The sensitivity of the building is in order to measure its influence level on overall energy performance,large sensitivity means have the greater influence by architectural design changing.(3)On the building suitability: Semi-transparent PV Fa?ade performance is better than the single white glass in five typical climate zone,has the potential alternative use;In cold region,severe cold region of east,west,south,and the remaining three typical climate zones,Semi-transparent PV Fa?ade performance is better than the double-layer vacuum glass Fa?ade,has a potential alternative to use;In cold region south(window wall ratio > 0.35),the hot summer and cold winter area south(window wall ratio > 0.5),the hot summer and warm winter area and moderate areas,Semi-transparent pv Fa?ade performance is better than the double Low-e glass,has the potential alternative use.