论文部分内容阅读
混合制冷工质的传热性能差,使得其应用受到一定限制,而采用适当的强化传热技术可以大大提高混合制冷工质传热性能.实验的热流密度范围内,在相同的热流密度条件下,非共沸混合制冷剂R134A/R142B在机械加工表面多孔管外沸腾传热膜系数是光滑管的1.78~3.33倍.“,”It is well known that the nucleate boiling heat transfer coefficients of nonazeotropic mixtures on a plain tube is significantly low.The heat transfer enhancement technique should be adopted to improve the pool boiling heat transfer performance of refrigerants mixtures.The objective of the present paper is to obtain nucleate pool boiling heat transfer performance and mechanism for new refrigerants mixtures on processed porous tube as to determ...