EVALUATION STUDY OF PHOTOVOLTAIC BUILDING RETROFIT PROJECTS UNDER MULTILEVEL GREY SYSTEM

Liu Bing; Liu Xiaohai; Zhu Li; Ji Yuchen

doi:10.19912/j.0254-0096.tynxb.2024-0239

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 478-485. DOI: 10.19912/j.0254-0096.tynxb.2024-0239

EVALUATION STUDY OF PHOTOVOLTAIC BUILDING RETROFIT PROJECTS UNDER MULTILEVEL GREY SYSTEM

Liu Bing^1,2, Liu Xiaohai², Zhu Li^3,4, Ji Yuchen³

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Abstract

PV building renovation projects currently lack a unified standard evaluation system. Therefore, on the basis of previous studies related to the evaluation of economic and comprehensive benefits of photovoltaic buildings, the evaluation matrix of photovoltaic building renovation projects is established by constructing a multilevel grey system. The system combines the entropy weight method, grey correlation method and technique for order preference by similarity to an ideal solution （TOPSIS method） to establish an intuitive and feasible research model to compare and evaluate the series of renovation plans of an office building of a certain government agency located in Tianjin. The research results show that the PV building evaluation model established under the multilevel grey system is convenient and effective, and achieves quantitative analysis of the retrofit scheme. The model is used for the subsequent improvement of the PV scheme of this project and the evaluation of other PV building retrofit projects. Installing PV on the roof and façade of a typical office building with good lighting conditions can achieve the goal of a “net-zero-energy building”, with an annual self-sufficiency rate of more than 60 percent.

Key words

photovoltaic technologies / sustainable building / PV building / function evaluation / multilevel grey evaluation

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Liu Bing, Liu Xiaohai, Zhu Li, Ji Yuchen. EVALUATION STUDY OF PHOTOVOLTAIC BUILDING RETROFIT PROJECTS UNDER MULTILEVEL GREY SYSTEM[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 478-485 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0239

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