Design and operation of a Tesla-type valve for pulsating heat pipes

S.F. de Vries, D. Florea, F.G.A. Homburg, A.J.H. Frijns

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Abstract

A new Tesla-type valve is successfully designed for promoting circulation in a pulsating heat pipe (PHP) and improving the thermal resistance. Its functionality and diodicity is tested by laminar single-phase modelling and by steady two-phase flow experiments. The valve is symmetrically integrated in a single-turn PHP, which reduces variabilities to give a more thorough understanding of the behaviour in PHPs. Two transparent bottom-heated PHPs, one with and one without valves, are manufactured and the flow behaviour and thermal performance is studied. The valves produced a diodicity which lead to a difference in velocity of 25% for the different flow directions. Furthermore, a decrease of 14% in thermal resistance was observed due to the addition of the valves.
Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalInternational Journal of Heat and Mass Transfer
Volume105
DOIs
Publication statusPublished - 1 Feb 2017

Keywords

  • Diodicity
  • Promoting circulation
  • Pulsating heat pipe
  • Tesla valve

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