Thermosiphon with vapor separation: Experimental comparison to conventional type

Lin Zhu, Pega Hrnjak

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents experimental evaluation of a thermosiphon loop in two systems: conventional and with separation. Thermosiphon with separation is a modification of the conventional system by allowing vapor only to enter condenser, and thus is expected to provide better operation than conventional baseline. The effects of different operating conditions on mass flow rate, height of liquid, pressure drop and temperature difference of two systems in steady state, as well as the startup features of two systems were presented. The system with separation showed improved operation in startup. The conventional system took longer time to stabilize with stronger oscillations of mass flow rate at startup than system with separation. The temperature difference of the system with separation also had a small improvement when heat load was low in steady state. Oversized condenser is identified as the reason why separation did not always realized full potential to improve the performance of the system in steady state. Reducing size of the condenser is identified and the right action and it will be verified in a next step.

Original languageEnglish (US)
Pages (from-to)879-886
Number of pages8
JournalApplied Thermal Engineering
Volume121
DOIs
StatePublished - 2017

Keywords

  • Separation
  • Start-up
  • Thermosiphon

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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