关键词: 丙烷, 传热, 蒸发, 冷凝, 实验研究

Abstract:

To simulate the heat process of propane in the intermediate fluid vaporizer(IFV),the test rig has been designed and built.Using water as the heat source,cold nitrogen as cold source,the boiling heat transfer and condensing heat transfer experiments of propane were conducted in two smooth concentric circular tubes.Inlet water temperature,water mass flow rate and gradient of tubes were analyzed to see how those factors affeted.With the increase of heat flux,the boiling heat transfer coefficient of propane increases and the tendency goes gentle.The boiling heat transfer coefficient is bigger in declining tubes.The experimental results show the same trend with prediction results from Cooper equation,with 30% of deviation.With the increase of wall sub-cooling,the condensation heat transfer coefficient of propane decreases and the tendency becomes gentle.The condensation heat transfer coefficient of propane is slightly bigger in declining tubes.The experimental results show the same trend with prediction results from Nusselt equation,with 40% of deviation.

Key words: propane, heat transfer, evaporation, condensation, experimental study