辐照强度对太阳能集热-辐射制冷复合系统热性能影响研究
首发时间:2017-08-02
摘要:针对一种太阳能集热-辐射制冷复合系统,结合典型气象年数据,文章研究了太阳辐照强度变化对系统热效率η和总热损失系数UL的影响规律。建立了复合系统物理模型,模拟了不同辐照强度下系统热效率,与实验结果的均方根误差为3.97%。在此基础上对六个不同典型气候类型代表城市的全年太阳能集热性能进行对比分析。结果表明,全年得热量最多和最少的地区分别为亚热带季风气候的堪培拉(4048.73MJ/m2)和温带大陆性气候的纽约(2791.34 MJ/m2)。研究结果有利于综合评估和比较不同气候类型地区全年BTPT复合系统热性能,对系统性能较差的季节或地区提出改进措施。
关键词: 太阳能集热 辐照强度 热效率 总热损失系数 典型气候类型城市 数值模拟
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Study of influence of solar irradiance on the thermal performance of a combined diurnal solar heating and nocturnal radiative cooling system
Abstract:The influence of solar irradiation intensity on thermal efficiency (η) and overall thermal loss coefficient (UL) of a combined diurnal solar heating and nocturnal radiative cooling system is studied based on typical weather year data in this paper. The physical model of the system is established and the thermal efficiency at different solar irradiance is simulated. The root-meaStudy of influence of solar irradiance on the thermal performance of a combined diurnal solar heating and nocturnal radiative cooling systemn-square error with the experimental results is 3.97%. On this basis, annual solar thermal performance of six typical climate types of representative cities is compared. Results show that the maximum and minimum annual heat gains are subtropical monsoon climate of Canberra (4048.73MJ/m2) and temperate continental climate of New York (2791.34 MJ/m2) respectively. The results are beneficial to comprehensively evaluate and compare annual thermal performance of the system in different regions. Appropriate improvement measures in the period of poor thermal performance is put forward as well.
Keywords: solar heating irradiation intensity thermal efficiency overall thermal loss coefficient typical climate types of cities numerical simulation
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辐照强度对太阳能集热-辐射制冷复合系统热性能影响研究
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