Development of cryogenic loop heat pipes: A review and comparative analysis

Lizhan Bai, Lianpei Zhang, Guiping Lin, Jiang He, Dongsheng Wen

Research output: Contribution to journalReview articlepeer-review

50 Scopus citations


Abstract Loop heat pipes (LHPs) are highly efficient two-phase heat transfer devices with the ability to transport a large amount of heat over a long distance. Due to increasing demand of efficient cryocooling applications in both space and terrestrial surroundings, LHPs operating in cryogenic temperature range have been extensively investigated in recent years. This work provided a comprehensive review of the state-of-the-art of cryogenic loop heat pipes (CLHPs). Five different types of CLHPs were categorized, and a comparative analysis between CLHPs and ambient LHPs and among different types of CLHPs was conducted. More attention was paid to the supercritical startup of CLHPs, and the operation and performance characteristics of different types of CLHPs were compared in terms of system structure, supercritical startup, heat transport capacity and the effect of parasitic heat load. The parameters that affect the CLHP performance were analyzed, and the optimization strategy was proposed in order to progress their future development and engineering applications.

Original languageEnglish
Article number6697
Pages (from-to)180-191
Number of pages12
JournalApplied Thermal Engineering
StatePublished - 27 Jun 2015
Externally publishedYes


  • Cryogenic
  • Heat transport
  • Loop heat pipe
  • Supercritical startup


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