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Energy, economic, emissions analysis of semi-flexible crystalline silicon photovoltaic system integrated with factory building roofs based on actual electricity load and cost conditions
Energy and Buildings ( IF 6.6 ) Pub Date : 2025-01-20 , DOI: 10.1016/j.enbuild.2025.115358
Hua Zhang, Xinzhu Chen, Wenxin Li, Ruili Peng, Jie Ji, Xiaoxiao Su, Chenglong Luo
Energy and Buildings ( IF 6.6 ) Pub Date : 2025-01-20 , DOI: 10.1016/j.enbuild.2025.115358
Hua Zhang, Xinzhu Chen, Wenxin Li, Ruili Peng, Jie Ji, Xiaoxiao Su, Chenglong Luo
To address the gaps in analyzing the economic benefits of photovoltaic (PV) systems affected by electricity price fluctuations and load demand changes, this paper examines the economic performance of a novel building-integrated semi-flexible crystalline silicon photovoltaic (BI-SFPV) system, which has effectively overcome the technical challenges of low-load-bearing roofs. Using actual electricity consumption data from a factory in Nanjing, the study introduces the concepts of peak and nominal self-consumption rates. It further evaluates the power generation benefits, carbon revenue, and payback periods of the BI-SFPV system under various nominal self-consumption rates and policy scenarios, considering China’s grid parity and tender tariff context. The results indicate that, for a 989.82 kWp BI-SFPV system, economic benefits increase over its lifecycle as the nominal self-consumption rate rises, reaching a maximum of 22.29 × 106 RMB with a payback period of 3.50 years and a minimum of 10.09 × 106 RMB with a payback period of 7.57 years. The system achieves a total carbon emission reduction of 18.33 kgCO2 /Wp , generating 1.45 × 106 RMB in carbon revenue. Additionally, lower nominal self-consumption rates result in greater policy sensitivity; at nominal self-consumption rate of 0.2, tender price reduces economic benefits by 22.52 % relative to grid parity price, extending payback period by 1.77 years.
更新日期:2025-01-20