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Two-phase heat transfer device

  • US 10,209,008 B2
  • Filed: 05/28/2014
  • Issued: 02/19/2019
  • Est. Priority Date: 05/29/2013
  • Status: Active Grant
First Claim
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1. A heat transfer device, subject to gravity, suitable for extracting heat from a heat source and for restoring this heat to a cold source by a two-phase working fluid contained in a closed general circuit, comprising:

  • at least one evaporator, having an inlet and an outlet,at least one condenser,a reservoir having an inner volume filled with a working fluid in two-phase form with a liquid portion and a gas portion separated by a liquid-gas interface, and at least one inlet and/or outlet port, the reservoir serving as an expansion tank for the working fluid,a first communication circuit, for fluid mainly in the vapor phase, connecting the outlet of the evaporator to an inlet of the condenser,a second communication circuit, for fluid mainly in the liquid phase, connecting an outlet of the condenser to the reservoir and to the inlet of the evaporator, wherein;

    the reservoir comprises a plurality of floating bodies separating the liquid portion from the gas portion and forming a thermal barrier, by means of which heat exchanges between the liquid portion and the gas portion are slowed down, while allowing liquid-gas exchanges at the liquid-vapor interface at saturation conditions,said floating bodies are enveloped in a net,said plurality of floating bodies forms a plurality of superimposed layers, andthe net allows the floating bodies, whenever the reservoir is tilted, to reconfigure themselves spatially to occupy in a permeable manner all of the surface of the liquid-gas interface.

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