Device and a method for recovering heat from the soil

Heat exchange – Spur tube projects into enclosure

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165 45, F24J 302, F28D 712

Patent

active

044523033

ABSTRACT:
A device and method for recovering heat from the soil and groundwater, comprise heat-exchanging means consisting of an inner tube, an outer tube and partitions forming longitudinal channels between said inner and outer tube.
An inlet for heat-exchanging fluid and an outlet for heat-exchanging fluid are present for conveying a heat-exchanging fluid through said longitudinal channels.
The heat-exchanging means are preferably placed in a perforated casing allowing passage of liquid but not of soil particles. The casing consists preferably of an outer casing tube and an inner casing tube, casing partitions providing longitudinal casing channels. For allowing passage of groundwater the outer casing tube and the inner casing tube are provided with perforations.
Heat is recovered by passing a heat-exchanging fluid through the casing channels.

REFERENCES:
patent: 1981730 (1934-11-01), Hankins
patent: 2665556 (1954-01-01), Otten
patent: 2712223 (1955-07-01), Hunt et al.
patent: 2730083 (1956-01-01), Kremser
patent: 3976129 (1976-08-01), Silver
patent: 3991822 (1976-11-01), Morris
patent: 4030549 (1977-06-01), Bouck
patent: 4286651 (1981-09-01), Steiger et al.

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