Investigation of impact of different working fluids on the operational characteristics of miniature LHP with flat evaporator

• Published in: Applied thermal engineering Vol. 31; no. 16; pp. 3387 - 3392
• Main Authors: Liu, Zhichun, Gai, Dongxing, Li, Huan, Liu, Wei, Yang, Jinguo, Liu, Mengmeng
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.11.2011; Elsevier
• Subjects: Acetone; Applied sciences; Energy; Energy. Thermal use of fuels; Evaporation; Exact sciences and technology; Heat transfer; LHP; Methyl alcohol; Miniature; Temperature oscillations; Theoretical studies. Data and constants. Metering; Thermal engineering; Walls; Working fluid; Working fluids; Working fluid; LHP; Temperature oscillations; Miniaturized; Oscillation; Evaporator; Experimental study; Heat transfer; Acetone; Methanol
• ISSN: 1359-4311
• DOI: 10.1016/j.applthermaleng.2011.06.023

Experimental studies are carried out on the operational characteristic of LHP with a flat evaporator, the difference between methanol and acetone as working fluid is especially investigated in the study. Result shows that the flat-plate LHP has a good startup characteristic and ability to adapt heat load change. Compared with LHP-methanol, the LHP-acetone starts up faster, and when it comes to steady status, the temperature of evaporator wall is lower; however, heat transfer limitation of LHP-acetone is far less than that of LHP-methanol. ► We conduct experimental study on a flat LHP using methanol and acetone respectively. ► Effects on LHP performance with the tilt angle and charging ratio are investigated. ► LHP-acetone starts up faster and temperature of evaporator wall is lower. ► Heat transfer limitation of LHP-acetone is far less than that of LHP-methanol.