相变储能水箱蓄放热性能多因素模拟分析
发布时间：2018-10-30 07:03
【摘要】：目的研究多种影响因素下的相变储能水箱蓄放热性能,优化相变储能水箱设计参数.方法以CFD软件为平台,从4个方面模拟了11组相变储能水箱的蓄放热情况,确定最优的相变储能水箱设计参数.结果模拟结果表明,采用直径30 mm相变封装单元的水箱蓄放热速度比采用40 mm和50 mm相变封装单元的水箱更快.放热阶段应在满足供热需求的前提下选取较小的水箱进水流速.相变材料(PCM)的导热系数提高0.1 W/(m·K),节省了近50%的蓄放热时间.相变封装单元交错排列时相变储能水箱蓄放热效果好于顺序排列.最后选取最优的设计参数进行模拟,模拟结果显示放热时水箱出水被加热2℃以上的时间为1.45 h,占总放热时间的63%.结论笔者分析得出的结果将为实际相变储能水箱的设计提供参考,有利于提高相变储能水箱的蓄放热性能.
[Abstract]:In order to optimize the design parameters of phase change energy storage tank, the heat storage performance of phase change storage tank is studied. Methods based on CFD software, the heat storage and discharge of 11 groups of phase change energy storage tanks were simulated from four aspects, and the optimal design parameters of phase change energy storage tanks were determined. The simulation results show that the heat storage rate of water tank with 30 mm diameter phase change packaging unit is faster than that with 40 mm and 50 mm phase change packaging unit. In the exothermic stage, the smaller inlet velocity of water tank should be selected on the premise of satisfying the heating demand. The thermal conductivity of phase change material (PCM) was increased by 0.1 W / (m K), and the heat storage and exothermic time was saved by nearly 50%. The heat storage and exothermic effect of phase change storage tank is better than that of sequential arrangement when phase change packaging units are staggered. At last, the optimal design parameters are selected to simulate. The simulation results show that the time when the effluent of the tank is heated above 2 鈩，
本文编号：2299291
[Abstract]:In order to optimize the design parameters of phase change energy storage tank, the heat storage performance of phase change storage tank is studied. Methods based on CFD software, the heat storage and discharge of 11 groups of phase change energy storage tanks were simulated from four aspects, and the optimal design parameters of phase change energy storage tanks were determined. The simulation results show that the heat storage rate of water tank with 30 mm diameter phase change packaging unit is faster than that with 40 mm and 50 mm phase change packaging unit. In the exothermic stage, the smaller inlet velocity of water tank should be selected on the premise of satisfying the heating demand. The thermal conductivity of phase change material (PCM) was increased by 0.1 W / (m K), and the heat storage and exothermic time was saved by nearly 50%. The heat storage and exothermic effect of phase change storage tank is better than that of sequential arrangement when phase change packaging units are staggered. At last, the optimal design parameters are selected to simulate. The simulation results show that the time when the effluent of the tank is heated above 2 鈩，
本文编号：2299291
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