REGIONAL APPLICABILITY ANALYSIS OF ENERGY PILE-BUILDING PHOTOVOLTAIC/THERMAL SYSTEM

Wang Fang; You Tian

doi:10.19912/j.0254-0096.tynxb.2024-0214

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 721-728. DOI: 10.19912/j.0254-0096.tynxb.2024-0214

REGIONAL APPLICABILITY ANALYSIS OF ENERGY PILE-BUILDING PHOTOVOLTAIC/THERMAL SYSTEM

Wang Fang, You Tian

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Abstract

The energy pile-building integrated photovoltaic/thermal （BIPV/T） system recovers the waste heat from photovoltaic power generation and stores it in the soil around the energy piles, maintaining the soil thermal balance around energy piles while enhancing the photovoltaic efficiency. To promote the application of the system, this study selects four representative cities in China's severely cold and cold regions to explore the system's performance in different regions. By establishing the dynamic system model on TRNSYS platform, the systems in the four cities are designed under the same operation strategies and their performances are compared. The results indicate that due to the highest heating demand for the building in Harbin, the required solar heat storage capacity is the highest for the soil, reaching 130.91 MWh. The BIPV/T collector has the highest electric efficiency and output in Harbin, being 19.31% and 73.29 MWh respectively. The photovoltaic modules in Xining have the highest heat collection efficiency, which is 36.24%. The system exhibits the best energy-saving performance in both Harbin and Xining, with energy savings rates exceeding 96%. Additionally, the system also demonstrates good economic viability during long-term operation. This system promotes the application of renewable energy in buildings and achieve low-carbon emission in the building sector.

Key words

energy pile / ground source heat pump system / BIPV / soil thermal balance / regional applicability

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Wang Fang, You Tian. REGIONAL APPLICABILITY ANALYSIS OF ENERGY PILE-BUILDING PHOTOVOLTAIC/THERMAL SYSTEM[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 721-728 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0214

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