Operating characteristic investigations in pulsating heat pipe

Qingjun Cai*, Chung-Lung Chen, Julie F. Asfia

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


Pulsating heat pipe (PHP) is an interesting heat transfer device. In this paper we focus on PHP heat transfer characteristics versus its operating temperature. In experiments of copper and stainless steel PHPs, results indicate that, at a same input power both the total temperature differences (from the evaporator to condenser) and the evaporator temperature fluctuations are relevant to operating temperature. The minimal total temperature difference and temperature fluctuation appear at an operating temperature ranging from 120°C to 160°C. Experimental analysis of the evaporator temperature fluctuations show that single phase cooling in PHP causes a large total temperature difference and temperature fluctuation. Phase change proportion increases at the optimal operating temperature. Static mechanical balance combining with dynamic elastic oscillation system is used to interpret PHP temperature variations versus the operating temperature.

Original languageEnglish
Pages (from-to)1329-1334
Number of pages6
JournalJournal of Heat Transfer
Issue number12
StatePublished - 1 Dec 2006

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