能源桩-建筑光伏光热系统回收光伏发电余热,并将其蓄存在能源桩周围的土壤中,在提高光伏发电效率的同时,有效维持能源桩周围的土壤热平衡。为促进系统的推广应用,该文选取中国严寒及寒冷地区的4个代表城市,基于TRNSYS软件建立系统模型,在相同的运行策略下完成4个地区的系统设计,分析比较系统在不同地区的运行效果。结果表明：哈尔滨地区因最高的热负荷需求,所需太阳能蓄热量最高,达130.91 MWh;哈尔滨的光伏组件具有最高的发电效率和发电量,达19.31%和73.29 MWh,西宁的光伏组件集热效率最高,为36.24%;系统在哈尔滨和西宁具有最好的节能效果,节能率达96%以上;此外系统在长期运行条件下展示了更好的经济性。该系统将促进可再生能源在建筑中的应用,实现建筑领域的低碳减排。
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.
关键词
能源桩 /
地源热泵系统 /
光伏一体化建筑 /
土壤热平衡 /
地区适用性
Key words
energy pile /
ground source heat pump system /
BIPV /
soil thermal balance /
regional applicability
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基金
国家自然科学基金（52108102; 52478110）; 广东省基础与应用基础研究基金（2024A1515010734; 2021A1515011739）
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