R30在矩形微通道内沸腾换热数值模拟  

NUMERICAL SIMULATION ON BOILING HEAT TRANSFER OF R30 IN RECTANGLE MICROCHANNEL

作　　者：罗新奎 王小军[1] 罗云[1] 杨祺[1] 冯天佑[1] 李勇[1] 范超[1] LUO Xin-kui;WANG Xiao-jun;LUO Yun;YANG Qi;FENG Tian-you;LI Yong;FAN Chao(Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China)

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《真空与低温》2017年第2期120-123,共4页Vacuum and Cryogenics

摘　　要：利用FLUENT软件,采用VOF两相流模型对制冷剂R30在横截面为0.5 mm×0.5 mm、长为500 mm矩形微通道内的沸腾换热进行了数值模拟。以制冷剂入口温度、压力和质量流率作为变量,得出了典型流型、壁面平均温度、换热系数、截面含气率等参数的变化规律。结果表明,提高制冷剂入口温度和压力有利于增强R30在微通道内的沸腾换热,换热系数随着质量流率的增大而增大,随着截面含气率的增大而减小。Boiling heat transfer of R30refrigerant in a rectangle microchannel with the diameter of0.5mm×0.5mmand the length of500mm is numerically simulated with FLUENT software using VOF two-phrase flow model.The inletworking condition of refrigerant and mass flow rate are chosen as variables.The law of typical flow regimes,average walltemperature,heat transfer coefficient and void fraction are obtained.The simulation result shows that it is useful to enhancethe boiling heat transfer of R30in micro-channel by increasing the inlet temperature and pressure of the refrigerant.Heat transfer coefficient is increased with the increasing of flow rate and decreased with the increasing of void fraction.

关 键 词：微通道 沸腾换热 数值模拟 

分 类 号：TB611[一般工业技术—制冷工程]