| In line with the trend of the low-carbon era,it is necessary for buildings to apply renewable energy technology to achieve a shift from energy consumption to production capacity,in order to reduce building energy consumption and carbon emissions.In the past,photovoltaic modules had a negative impact on buildings,and visually unattractive standard photovoltaic modules often appeared as exotic elements on roofs and facades.Now,with the development of BIPV technology,photovoltaic modules are endowed with more functions beyond power generation,achieving good integration with buildings.The comprehensive teaching building in universities has multiple functions such as scientific research,teaching,and office work,and is a type of building that is needed in the current context of interdisciplinary integration and development.The comprehensive teaching buildings in universities usually have the characteristics of large building volume,diverse public spaces,complex building forms and skin enclosure structures,and their energy consumption is much higher than that of general teaching buildings,thus having prominent energy-saving and carbon reduction spaces and needs.This paper attempts to apply BIPV concepts and technologies in the design and application of comprehensive teaching building.Firstly,the BIPV cases related to comprehensive teaching buildings are classified and analyzed,and BIPV design and application experience in different application scenarios are extracted.Combined with the architectural characteristics of comprehensive teaching buildings,BIPV application strategy and design method of this kind of building are summarized,and the BIPV design process of opaque roof,transparent roof,opaque wall and transparent wall are generated,and the characteristics and selection tendency of photovoltaic cell modules involved in the design and application are studied.Secondly,taking the Yifu Building of XAUAT as an example to design and apply BIPV technology,and corresponding BIPV design is generated by combining the building roof,sunshade,daylighting roof,wall,curtain wall and entrance canopy.The design process is as follows: Analysis of the key features of photovoltaic power generation on the building surface,shadow occlusion analysis of the building surface to determine the application area of BIPV,combined with the location orientation of the building surface,color texture,light transmission requirements,space construction and other aspects of the photovoltaic technology into the building envelope,forming various BIPV designs.Then,the application benefit of BIPV is evaluated.By comparing the hourly building electricity consumption and BIPV power generation throughout the year,it is found that photovoltaic power generation can be absorbed by buildings immediately,with higher KWH income.By quantifying the initial investment cost,operation and maintenance cost,power generation income and policy subsidy income of each BIPV design,it is concluded that the static return on investment period of each BIPV design and application in Yifu Building is 7.03-18.98 years,which is all less than the 25-year life period of BIPV,and has certain economic benefits.Finally,two BIPV application schemes of Yifu Building of XAUAT are generated.The first BIPV application scheme of roof awning and unoccuated roof have a static return on investment period of 7.05 years,and the cost efficiency advantage is relatively high.The another BIPV application scheme integrating various BIPV components is designed as the maximum installed capacity of Yifu Building.This scheme has a static return on investment period of 11.38 years,which can make up for the longer investment return of the facade.In particular,the photovoltaic power generation under this scheme can offset11.4% of the building’s electricity consumption and reduce 1.8% of the entire campus building’s electricity consumption.This paper has a certain universality to the BIPV design and application method of the university comprehensive teaching building,which can provide reference for similar BIPV application research.This paper forms a detailed and time-efficient BIPV design data integration,which provides suggestions for architects to apply BIPV technology. |
