环境温度与压力对HFE7100制冷剂单液滴蒸发特性的影响机制研究

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中图分类号：TK121 文献标志码：A

DOI： 10.7652/xjtuxb202601011 文章编号：0253-987X（2026）01-0107-10

Study on the Influence Mechanism of Ambient Temperature and Pressure on Sgle Droplet Evaporation Characteristics of HFE710o Refrigerant

YIN Jg，LIU Yi，Leslie K. NORVIHOHO，CHEN B，ZHOU Zhifu （ Multipbase Engeerg， ， ，Cha）

Abstract ： To systematically vestigate the fluence mechanism of ambient temperature and pressure on the sgle-droplet evaporation characteristics of the environmentally friendly refrigerant HFE7100， the suspended droplet method is employed，combed with high-speed imagg and thermocouple temperature measurement techniques to simultaneously observe droplet morphology and ternal temperature changes.Experimental results dicate that the sgle-droplet evaporation characteristics of HFE7lOO are significantly affected by ambient temperature （50，100，150，200，250∘C） ）and pressure（1，1O，2O bar）. At high temperatures （>100∘C ），evaporation exhibits a two-stage characteristic：an itial heatg stage and an equilibrium evaporation stage；whereas at a low temperature of 50∘C ， it only shows a sgle-stage equilibrium evaporation. At 250∘C ，due to the small difference component boilg pots，bubble formation and rupture can be observed，but their promotg effect on evaporation is limited，and high pressure （1O and 2O bar） significantly reduces bubble size. High temperature significantly accelerates droplet heatg and evaporation by enhancg gas-liquid heat transfer tensity， saturated vapor pressure，and gas-phase diffusion coefficient，but it creases the proportion of the itial heatg stage. Furthermore，the fluence of ambient pressure on evaporation characteristics depends on the ambient temperature. At a low temperature of 50∘C ，creased pressure reduces the evaporation rate constant by suppressg vapor diffusion. However，at high temperatures （ （150，200，250∘C） ），pressure accelerates droplet heatg by reducg latent heat of vaporization and enhancg convective heat transfer， thereby creasg the evaporation rate constant. These effects （promotg droplet heatg vs. suppressg vapor diffusion） compete with each other，ultimately determg the impact of ambient pressure on droplet evaporation. The fdgs provide an important theoretical basis for the optimization of spray coolg technology.

words： HFE71Oo refrigerant； droplet evaporation; spray coolg; ambient temperature; ambient pressure

随着高功率电子芯片、航空航天及能源转换设备的快速迭代，热管理技术面临着前所未有的挑战。（剩余16655字）