低沸点工质逆流连通微通道沸腾传热均温性的实验研究  

Experimental Study on Temperature Uniformity in Counter-flow Microchannel with Interconnected Slots with Low Boiling Point Fluid

作　　者：王东玉 洪芳军[1] 许锦阳 WANG Dongyu;HONG Fangjun;XU Jinyang(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《制冷技术》2023年第5期1-8,16,共9页Chinese Journal of Refrigeration Technology

基　　金：国家重点研发计划(No.2017YFE0127100)。

摘　　要：本文提出了一种逆流连通微通道(CFIM),并使用低沸点工质R1233zd(E),与顺流微通道(CCM)和逆流微通道(CFM)进行了对比实验。结果表明:CFIM的均温性得到了显著改善,在质量流率429 kg/(m^(2)·s)和热流密度144 W/cm^(2)下,基底最大温差仅为3.7℃,比CFM和CCM分别降低了9.6℃和5.8℃;三种微通道的基底最大温差随热流密度的变化趋势都可以划分为单相阶段、沸腾发展阶段和沸腾充分发展阶段这三个阶段;沸腾状态下CCM和CFM的基底温度均呈现先升高后降低的趋势,而CFIM的基底温度最低点位于通道的中间位置,其它各点温度则较为接近。A counter-flow microchannel with interconnected slots(CFIM)is proposed in this paper,and its thermal performance was compared with a concurrent microchannel(CCM)and a counter-flow microchannel(CFM),using low boiling point fluid,R1233zd(E).It is found that the temperature uniformity of CFIM is obviously better.At the mass flux of 429 kg/(m^(2)·s)and the heat flux of 144 W/cm^(2),the substrate maximum temperature difference of CFIM is only 3.7℃,which was 9.6℃and 5.8℃lower than CFM and CCM,respectively.The variation trend of the substrate maximum temperature difference with heat flux of the three microchannels could all be divided into three stages,i.e.,single-phase stage,boiling developing stage and boiling developed stage.In boiling state,the substrate temperature of CCM and CFM increases first and then decreased,while for CFIM,the temperature lowest point is in the center,and the temperatures of other points were similar.

关 键 词：微通道 连通槽 流动沸腾 均温性 低沸点工质 

分 类 号：TB611[一般工业技术—制冷工程] TK124[动力工程及工程热物理—工程热物理]