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.
This paper was proposed to investigate the thermal energy storage and release perform- ance of phase change energy storage tank. The optimal design parameters were determined accord- ing to the 11 groups CFD simulation data of heat storage and release in the phase change water tank. The results showed that the heat storage or release process was more quickly with diameter of 30 mm compared to 40 mm or 50 mm, and smaller inlet velocity should be selected on the condi- tion of meeting the heating demand. Increasing 0. 1 W/（ m. K） coefficient of thermal conductivity of PCM could save about 50% heat storage and release time. The staggered arrangement of phase change packet unit demonstrated better performance than the sequential arrangement. Finally, the simulation results with ootimal desizn oarameters oroved that the out water can be heated above2 ℃ for 1.45 h, accounting for 63 % of the total heat release time. The simulation analysis conclu- sion will provide a reference for the design of the phase change energy storage tank and is helpful to improve the heat storage performance of phase change energy storage tank.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2016年第4期675-683,共9页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家十二五科技支持计划项目(2014BAJ01B04-2)
关键词
相变储能技术
相变材料
设计参数
数值模拟
phase change energy storage technology
phase change material
parameter design
nu-merical simulation
