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Device for heat transport with two-phase fluid

  • US 10,234,213 B2
  • Filed: 02/14/2014
  • Issued: 03/19/2019
  • Est. Priority Date: 02/14/2013
  • Status: Active Grant
First Claim
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1. A device for heat transfer, suited for extracting heat from a hot source and for returning this heat to a cold source via a two-phase working fluid contained in a general closed circuit, comprising:

  • at least one evaporator, having an inlet and an outlet,at least one condenser, separate from and away from the evaporator,a tank with an internal volume , the internal volume including a liquid portion and a gas portion, and at least one inlet/outlet orifice laid out near the liquid portion, where the liquid portion has a volume that can vary between a minimum volume and a maximum volume,a first connection circuit for the working fluid in vapor phase, connecting the outlet of the evaporator to an inlet of the condenser;

    a second connection circuit, for the working fluid in liquid phase, connecting an outlet from the condenser to the tank and to the inlet of the evaporator;

    wherein the gas portion from the tank includes the vapor phase of the working fluid with a first partial pressure and a non-condensable auxiliary gas with a second partial pressure, where the second partial pressure is set to obtain a total pressure greater than or equal to a preset minimum operating pressure when the liquid portion in the entire general closed circuit is at the minimum volume, the device having no sensor and no active control, and hence operates in a purely passive operating mode, said device being configured to operate in a temperature range from -50°

    C. to +50°

    C., wherein;

    the internal volume of the tank is fixed and predefined during design for a given application; and

    the second partial pressure is at least several times greater than the first partial pressure when the liquid portion is at the minimum volume such that the minimum operating pressure is high enough to allow an instantaneous startup under a significant thermal load without preparation.

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