Refrigeration – Structural installation – Geographic – e.g. – subterranean feature
Patent
1980-06-03
1982-05-04
King, Lloyd L.
Refrigeration
Structural installation
Geographic, e.g., subterranean feature
622351, 623241, 165 45, F25D 2312, F25B 1300
Patent
active
043275605
ABSTRACT:
A combination earth heat exchanger and heat storage device for a heat pump system in which the earth is the heat source/sink. The device includes an elongated, hermetically-sealed enclosure containing a phase change material which is in thermal contact with both the primary heat transfer fluid and the surrounding soil. The heat transfer fluid, a mixture of water and of antifreeze, is circulated in a closed loop through pipes, sections of which are jacketted by at least one enclosure containing a phase change material. For heat addition to the fluid stream, a phase change material is used which has a transition temperature which is approximately 10.degree. F. below the mean seasonal ground temperature in the winter and slightly below the minimun undisturbed soil temperature at the depth at which the earth heat exchanger and heat storage device is embedded. The release of the latent heat to the heat transfer fluid limits the minimum temperature of the stream, thereby maintaining inlet conditions at the heat pump more favorable to its efficient operation than would otherwise be practicable. Alternately, for heat removal from the heat transfer fluid for cooling purposes, a phase change material is used which has a transition temperature which is approximately 10.degree. F. above the mean seasonal ground temperature in the summer and slightly above the maximum undisturbed soil temperature at the depth at which the device is embedded. The absorption of latent heat from the fluid stream limits its maximum temperature, thereby significantly improving the coefficient of performance of the heat pump system for air conditioning purposes.
REFERENCES:
patent: 2581744 (1952-01-01), Zimmerman
patent: 2584573 (1952-02-01), Gay
patent: 4042012 (1977-08-01), Perry et al.
patent: 4142576 (1979-03-01), Perry et al.
patent: 4257239 (1981-03-01), Partin et al.
Leon Harry I.
Leon Vivian L.
King Lloyd L.
Leon Harry I.
Leon Vivian L.
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