管壳式相变换热器贮热换热效果的数值研究  

NUMERICAL INVESTIGATION ON HEAT STORAGE AND HEAT EXCHANGE OF THE SHELL-AND-TUBE PHASE CHANGE HEAT EXCHANGER

作　　者：叶宏[1] 赵晓[1] 程丹鹏[1] 徐斌[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230027

出　　处：《太阳能学报》2008年第12期1499-1503,共5页Acta Energiae Solaris Sinica

基　　金："十一五"国家科技支撑计划(2006BAA04B02);国家自然科学基金项目(50402009);安徽省自然科学基金项目(050440201)

摘　　要：选取了一种典型的贮热管排列方式,壳侧走水,管侧填充相变材料,在此基础上建立了管壳式相变换热器对水流放热的数理模型,并据此模型对换热器放热过程进行了计算,根据计算结果分析比较了管内相变材料的有效导热系数、水的质量流率、入口水温、换热器长度对换热器整体性能的影响。通过对比换热器贮热量与同尺寸普通水箱的贮热量,分析了该型换热器相对于普通水箱的贮热优势。For the shell-and-tube phase change heat exchanger, the thermal resistance in the heat storage tube is the main factor which influences the integral effects of the heat exchanger. The heat storage tube was arranged typically： the water would flow along the shell-side, and the phase change materials would be filled in the tube-side. A mathematic-physical model was constructed for the heat transfer from the shell-and-tube phase change heat exchanger to the flowing water, and the heat releasing process of the heat exchanger was calculated according to this model. From the calculation results, the influences of different parameters, such as the effective thermal conductivity of the phase change materials in tube, the mass flow rate of water, the inlet temperature of water, and the length of the heat exchanger etc. on the integral performance of the heat exchanger were analyzed and compared, respectively. Through comparing the quantity of heat storage of the heat exchanger with that in the same sized common water tank, the heat storage advantage of this heat exchanger beyond the common water tank was analyzed.

关 键 词：管内强化传热 相变贮热管 管壳式相变换热器 有效导热系数 

分 类 号：TK511.3[动力工程及工程热物理—热能工程]