Johnson tube, a thermodynamic heat pump

Details Johnson tube, a thermodynamic heat pump Johnson tube, a thermodynamic heat pump

1986-05-09

1988-02-16

Bennet, Henry A.

Refrigeration

Refrigeration producer

62304, 62 86, F28D 500

Patent

active

047246839

ABSTRACT:
The kinetic energy of a liquid flowing under pressure form a source is employed to power a heat pump for accumulating thermal energy in a controlled volume. The liquid is jetted at high speed into a low pressure region in a drift tube wherein a portion of the fluid flash vaporizes and decreases the temperature of the resulting liquid-vapor mixture. As the mixture flows through the drift tube, the liquid couples momentum to the vaporized portion and causes the vapor to flow to a high pressure region within the tube. As a result, the vapor compresses and is maintained in a saturated state by heat transfer across the liquid-vapor phase boundary of the mixture. During the compression process, heat is transferred to the mixture from the controlled volume so as to increase the vapor pressure of the liquid and thereby prevent condensation of the vapor portion until a desired temperature is attained. As the mixture leaves the tube and flow to the controlled volume, the vapor condenses and an additional, incremental temperature increase occurs.

REFERENCES:
patent: 4476693 (1984-10-01), Johnson

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