相变微胶囊悬浮液的喷淋换热特性研究

Spray Heat Transfer Characteristics of Micro-encapsulated Phase Change Material Suspension

针对传统流体换热效率低的问题,使用芯材为正二十二烷(C_(22)H_(46))的相变微胶囊悬浮液(MPCMS)和纯水作为喷淋介质,搭建了1个小型喷淋塔装置。设定了5个初始喷淋温度(35℃、40℃、44℃、47℃、51℃)和3个空气流量(0.011 m^(3)/s、0.018 m^(3)/s、0.025 m^(3)/s)作为试验变量,探究了上述两种介质与空气之间的换热特性。研究结果表明:在常温常湿环境下,相变微胶囊悬浮液在不同工作温度区间的换热效果各有不同,当空气流量为0.018 m^(3)/s、0.025 m^(3)/s时,使用初始喷淋温度为44℃、47℃的MPCMS作为喷淋介质,比纯水更能提高换热效果;当空气流量为0.011 m^(3)/s时,使用初始喷淋温度为44℃的MPCMS作为喷淋介质比纯水更能提高换热效果。

To solve the problem of low heat transfer efficiency of traditional fluid,this paper used microencapsulated phase change material suspension(MPCMS)with the core material of n-dodecane(C_(22)H_(46))and pure water as the spray medium to build a small spray tower device.Five initial spray temperatures(35℃,40℃,44℃,47℃,51℃)and three air flows(0.011 m^(3)/s,0.018 m^(3)/s,0.025 m^(3)/s)were set as experimental variables to explore the heat transfer characteristics between the two media and air.The results show that the heat transfer effect of micro-encapsulated phase change material suspension is different in different working temperature ranges under normal temperature and humidity.When the air flow is 0.018 m^(3)/s and 0.025 m^(3)/s,the micro-encapsulated phase change material suspension with initial spray temperature of 44℃and 47℃can improve the heat transfer effect more than that of pure water.When the air flow rate is 0.011 m^(3)/s,MPCMS with initial spray temperature of 44℃can improve the heat transfer effect more than that of pure water.