冰浆在板式换热器中的流动与传热特性研究  

Experimental study on flow and heat transfer characteristics of ice slurry in a plate heat exchanger

作　　者：马克波 张静雅[1] 邵雪奎 MA Kebo;ZHANG Jingya;SHAO Xuekui(School of Energy Science and Engineering,Central South University,Changsha 410083,Hunan,China;China Machinery International Engineering Design&Research Institute Co.,Ltd.,Changsha 410083,Hunan,China)

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083 [2]中机国际工程设计研究院有限责任公司,湖南长沙410083

出　　处：《资源信息与工程》2022年第1期121-126,132,共7页Resource Information and Engineering

基　　金：国家自然科学基金(51676209)。

摘　　要：本文通搭建实验平台,对冰浆在板式换热器中的流动与换热特性进行了实验研究。实验中,冰浆流量变化范围约为0.5~1.3 m^(3)/h,含冰率约为1%~5%,雷诺数范围为600~1600,冰浆通过板式换热器的压降变化范围为0~50 kPa。结果显示:(1)冰浆流体在板式换热器中压降随着雷诺数Re及含冰率IPF(Ice Packing Fraction)增大而增大,并且冰浆流体的临界雷诺数比水小;(2)冰浆流体在板式换热器的换热与浆体流量q_(v)、含冰率F_(IP)及热流体侧入口温度等因素有关,且换热系数K随着q_(v)、含冰率F_(IP)和热流体侧入口温度的增大而增大;(3)当流量较小时,冰浆流体并不能明显提高换热器的换热性能。当冰浆流量q_(v)>1.18 m^(3)/h时,在同等流量下,冰—水综合换热系数大于水—水的综合换热系数;当流量q_(v)<1.18 m^(3)/h时,结果相反。对于冷侧对流换热系数而言,当q_(v)>1.15 m^(3)/h,冰浆的对流换热系数明显高于冷水的对流换热系数;当q_(v)<1.15 m^(3)/h,则相反。By establishing an experimental platform,This paper investigated flow and heat transfer characteristics of ice slurry in a plate heat exchanger.During the experiment,the variation ranges of flux,ice packing fraction(IPF),Reynolds number,and pressure drop of ice slurry were 0.5~1.3 m^(3)/h,1%~5%,600~1600,and 0~50 kPa,respectively.According to the results,flow drop of ice slurry in the plate exchanger increased with the increase of Reynolds number and IPF,and the critical Reynolds number of ice slurry was smaller than that of super cooled water.The heat transfer characteristics of ice slurry in the plate heat exchanger were significantly influenced by the volume flow rate q_(v),FIP and the initial temperature of the hotter flow side,increases of which could raise the heat transfer coefficient of the plate exchanger.Ice slurry with low flow rate had no significant influence on heat exchange performance of the plate exchanger.The integrated heat transfer coefficient of ice⁃to⁃water was larger than water⁃to⁃water when q_(v)>1.18 m^(3)/h,andthe result was opposite while q_(v)<1.18 m^(3)/h.The heat transfer coefficient of the ice slurry on the cold side was obvious higher than that of super cooled water when q_(v)>1.15 m^(3)/h,and when q_(v)<1.15 m^(3)/h,opposite results apperaed.

关 键 词：冰浆 板式换热器 流动与传热特性 

分 类 号：TB611[一般工业技术—制冷工程]