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研究了一种新型相变材料换热器,在其进出口的相应温度测试点布置铜镍合金热电偶,然后分别以不同的流速通入温度各为40℃、16—17℃的热、冷空气流,利用温度测试系统连续测出各测点的温度值。理论分析和实验研究结果验证了该换热器具有良好的热能储存与释放特性:当气流的质量流速分别为0.132,0.096 kg/s时,若相变材料的平均初始温度为17.4,17.7℃时,经过910,1 030 min后该换热器热能储存量各为21 056.67,21 014.34 kJ;在放热过程中,该换热器出口的气流温度维持在20℃以上的时间各为594,717 m in。它可用于温室、暖房、空调或工业生产中各种低温热能的回收和利用。
A new type of phase change material heat exchanger was researched. Copper-nickel alloy thermocouples were arranged at the corresponding temperature test points at the inlet and outlet of the heat exchangers. Then, respectively, at different flow rates, hot and cold Air flow, the use of temperature testing system for measuring the temperature of each measuring point. Theoretical analysis and experimental results show that the heat exchanger has good thermal energy storage and release characteristics. When the mass flow rates of the gas flow are 0.132 and 0.096 kg / s respectively, if the average initial temperature of the phase change material is 17.4 and 17.7 ℃ , After 910,1 030 min, the heat storage capacity of the heat exchanger was 21 056.67 and 21 014.34 kJ, respectively. During the exothermic process, the temperature of the outlet of the heat exchanger was maintained at 20 ℃ and above for 594,717 mins . It can be used in greenhouse, greenhouse, air conditioning or industrial production of a variety of low temperature heat recovery and utilization.