以双层相变材料复合水箱为研究对象,通过数值模拟和实验研究的方法,对该水箱的蓄热特性进行模拟分析与实验验证,对比分析单、双层相变材料复合水箱的热特性,探究双层相变材料位置对复合水箱蓄热特性的影响规律。研究结果表明,与单层相变材料复合水箱相比,双层相变材料复合水箱的热分层更好,蓄热能力得到提升,双层相变材料复合水箱较普通水箱的蓄热量提高9.7%。双层相变材料距离进出水口位置较远时,相变材料完成熔化的时间更接近,更有利于蓄热水箱的热分层。
Abstract
Heat storage technology is the key to achieving efficient operation of solar heating systems. This study takes the double-layer phase change materials hybrid tank as the research object. Through numerical simulation and experimental research methods, the thermal storage characteristics of the tank are simulated, analyzed, and verified by the experimental results. The thermal characteristics of a single-layer, double-layer phase change materials hybrid tank is compared and analyzed, and the influence of the position of the double-layer phase change materials on the thermal storage characteristics of the hybrid tank is explored. According to the research findings, the double-layer phase change materials hybrid tank has better thermal stratification and increased heat storage capacity when compared to the single-layer phase change materials hybrid tank. The heat storage capacity of the hybrid tank made of double-layer phase change materials is 9.7% higher than that of the conventional water tank. When the double-layer phase change materials are far from the inlet and outlet, the melting time of the phase change materials are closer, which is more conducive to the thermal stratification of the heat storage tank.
关键词
太阳能 /
相变材料 /
储热 /
复合水箱 /
热分层
Key words
solar energy /
phase change materials /
heat storage /
hybrid tank /
thermal stratification
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基金
国家重点研发计划（2019YFE0104900; 2022YFC3802705）; 陕西省教育厅2021年度青年创新团队建设科研计划（21JP060）; 西藏自治区拉萨市科技计划（LSKJ202308）
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