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| Number | Title | Issue Date |
| 5590715 | Underground heat exchange system The present invention discloses a system and method for simultaneously installing a pipe loop and a grout pipe in a wellbore. In another aspect such a system is then used to grout the wellbore by releasing the grout pipe from the pipe loop or from a botto... | 01/07/1997 |
| 5584190 | Freezer with heated floor and refrigeration system therefor A freezer box comprising an enclosure resting on soil, the soil having a tendency to freeze from the cooling effect of the freezer positioned above. Pipes, through which a warm fluid flows, thereby being cooled, buried under the freezer enclosure for warm... | 12/17/1996 |
| 5579996 | Radiant floor and wall hydronic heating systems A hydronic heating system that has a boiler supplying hot supply water, a reservoir of cooler return water, a supply water line, a return water line and one or more heating loops through which water flows from the supply line to the return line, the heati... | 12/03/1996 |
| 5561985 | Heat pump apparatus including earth tap heat exchanger A ground-coupled direct expansion heat pump apparatus includes an earth tap heat exchanger including a plurality of earth contacting tubes connected together in side-by-side relation. A first earth contacting tube defines a vapor refrigerant passageway an... | 10/08/1996 |
| 5560220 | Method for testing an earth tap heat exchanger and associated apparatus A method for identifying a leaking earth tap heat exchanger includes measuring an electrical resistance between the electrically conducting tubing of the earth tap heat exchanger and the surrounding soil or water to determine if the electrically insulatin... | 10/01/1996 |
| 5558779 | Method and apparatus for extracting water from marine sediments A mesh enclosed container is provided to remove melt water from frozen blocks of contaminated sediment which has been extracted from a marine environment. The mesh enclosure has a number of porous wicking tubes for insertion into corresponding cavities in... | 09/24/1996 |
| 5533356 | In-ground conduit system for geothermal applications An in-ground conduit system for a ground source heat pump is provided. The in-ground conduit system is a conduit-loop having at least one wing member mounted on the conduit loop such that the wing member contacts the ground in such a way so as to resist u... | 07/09/1996 |
| 5533355 | Subterranean heat exchange units comprising multiple secondary conduits and multi-tiered inlet and outlet manifolds An improved ground source heat pump system wherein the subterranean piping installation comprises modular heat exchange units. Each modular heat exchange unit comprises a plurality of parallel secondary conduits. The secondary conduits are connected betwe... | 07/09/1996 |
| 5526646 | Method of and apparatus for producing work from a source of high pressure, two phase geothermal fluid Apparatus for producing from a source of geothermal fluid that contains a mixture of high pressure steam, brine and noncondensable gases includes a heat exchanger for receiving geothermal fluid and transferring heat to water thereby vaporizing the same to... | 06/18/1996 |
| 5515679 | Geothermal heat mining and utilization Method and apparatus for recovering and utilizing thermal energy from subterranean hot rock by means of a self-powered closed system which transfers heat from the hot rock to a relatively cool liquid, e.g. water, flowing in a heat-conducting pipe that ext... | 05/14/1996 |
| 5509462 | Ground source cooling system The present invention relates to one or more ground tubes connected and channelized to provide a counter-flow heat exchanger with an annular space to permit water injection into the subsurface water table.... | 04/23/1996 |
| 5507149 | Nonporous liquid impermeable cryogenic barrier A method of making a nonporous, substantially liquid-impermeable cryogenic barrier within the Earth, and a nonporuous, substantially liquid-impermeable cryogenic barrier. A triple array of casings extends along respective sets of central axes from arrays ... | 04/16/1996 |
| 5477703 | Geothermal cell and recovery system An apparatus comprising a geothermal cell and recovery system comprising a heat exchange zone located in the earth and separated from the earth by an impermeable barrier. A housing containing a fluid pump and compressor is submersed in heat exchange zone ... | 12/26/1995 |
| 5477914 | Ground source heat pump system comprising modular subterranean heat exchange units with multiple parallel secondary conduits An improved ground source heat pump system wherein the subterranean piping installation comprises modular heat exchange units. Each modular heat exchange unit comprises a plurality of parallel secondary or branch conduits. The use of multiple parallel sec... | 12/26/1995 |
| 5442934 | Chilled gas transmission system and method Gas compression and chilling systems, particularly adapted for compressing and chilling gas for transmission through arctic pipelines are provided with a cross heat exchanger for transferring heat from gas compressed to the inlet gas to the compressor. Th... | 08/22/1995 |
| 5394935 | Earth coupled thermal barrier system An earth coupled, thermal barrier system of the invention has thermal panels for ceilings, floors, windows and walls; an air treatment unit to precondition the air and an earth coupled heat exchanger. The air treatment unit contains a preconditioning coil... | 03/07/1995 |
| 5388419 | Staged cooling direct expansion geothermal heat pump A "DX" heat pump is provided herein which is based on the principle of providing optimal heat exchange in the heating mode through three parallel ground loops, two of which can be cut off from the system and evacuated of refrigerant in the cooling mode. T... | 02/14/1995 |
| 5383337 | Method and apparatus for precooling water supplied to an evaporative cooler with a subterranean heat exchanger An apparatus for precoooling water supplied to an evaporative cooler of the type known as a "swamp cooler" includes inlet and outlet reservoirs secured by brackets to a bottom surface of the evaporative cooler water pan at substantially the same elevation... | 01/24/1995 |
| 5372016 | Ground source heat pump system comprising modular subterranean heat exchange units with multiple parallel secondary conduits An improved ground source heat pump system wherein the subterranean piping installation comprises modular heat exchange units. Each modular heat exchange unit comprises a plurality of parallel secondary or branch conduits. The use of multiple parallel sec... | 12/13/1994 |
| 5372010 | Method and arrangement for the compression of gas A method and an arrangement for compressing gas in a compressor station for a gas pipeline, especially in areas of permanent frost, wherein the gas is supplied in the gas pipeline to the compressor station at an entry pressure and the gas is returned to t... | 12/13/1994 |
| 5368092 | Apparatus and method for controlling temperature of a turf field A subsurface hydronic heat-exchanging apparatus and method are provided for controlling the temperature of a turf field. A temperature-controlling fluid is circulated from a temperature-controlled fluid source through a supply header laterally disposed to... | 11/29/1994 |
| 5339893 | Apparatus for containing toxic spills employing hybrid thermosyphons The present invention is directed to a hybrid thermosyphon which may be rapidly deployed to create a frozen soil barrier for containing toxic spills. In a particular embodiment, a plurality of thermosyphons are deployed for freezing the soil around and un... | 08/23/1994 |
| 5339890 | Ground source heat pump system comprising modular subterranean heat exchange units with concentric conduits An improved ground source heat pump system wherein the subterranean piping installation is constructed of a plurality of modular heat exchange units. Each such unit comprises an external tube with an expanded external surface and an insulated internal tub... | 08/23/1994 |
| 5329992 | Prefabricated ground coil assembly The invention provides a prefabricated ground coil assembly comprising headers and a plurality of flexible elongate coil elements, the ground coil being completely assembled ready for use and shipped as a compact annular package whose axial length is equa... | 07/19/1994 |
| 5327734 | Passive-active thermosyphon A thermosyphon for use in frozen or unfrozen soil includes an evaporator tion embedded in the soil, a condenser section exposed to ambient air, an intermediate section connecting the two sections and a heat exchanger connected to a mechanical refrigerati... | 07/12/1994 |
| 5322115 | Installation for energy exchange between the ground and an energy exchanger A heat exchanger is connected via an insulated flow pipe (26) to a pump (28) arranged in a borehole. The flow pipe and the pump are surrounded in the borehole by a protective tube (34) open at the bottom adjacent to a return region (38) which extends radi... | 06/21/1994 |
| 5318101 | Thermal accumulation type heating and cooling device using heat transfer medium A heating and cooling device comprising a box type heat exchange tank containing a heat transfer medium having an thermal accumulation effect therein and a heat exchange pipe arranged in said heat exchange tank. An air discharging member is mounted to an ... | 06/07/1994 |
| 5272879 | Multi-system power generator A geothermal power system utilizes a fluid refrigerant capable of changing phase between liquid and gaseous states. The system includes a heat exchanger exposed to a heat source such as earth, water, air, or industrial waste for vaporizing the fluid in th... | 12/28/1993 |
| 5253926 | Process for making general use of the earth's heat and obtaining minerals in the zone of weakness (at depths of 13-30 km) The hot-weak-rock process for overcoming the technical limitation inherent to the Hot-Dry-Rock Process, of not being able to overcome the shear strength of the rock beyond a certain depth in order to create heating surfaces through HYDRAFRAC. The hot-weak... | 10/19/1993 |
| 5244037 | Closed loop ground source pressurized system for a heat pump A closed loop, pressurized system for a ground source heat pump and a pressure/liquid source module therefore. The pressure/liquid source module has a liquid tank having a predetermined liquid level and an inlet pipe extending downwardly within the tank f... | 09/14/1993 |
| 5238053 | Method of and system for warming road surface A road surface is warmed by means of a two-phase thermosyphon with an easily vaporizable liquid partially filling a sealed container. A portion of the container serves as a condenser and another portion as an evaporator. If at least a portion of the evapo... | 08/24/1993 |
| 5233971 | Solar heated driveway apparatus A vehicular driveway pad is arranged to include a solar collector panel positioned adjacent thereto in a spaced relationship, having a first fluid conduit directed from the solar collector panel and a serpentine second conduit path under the driveway to e... | 08/10/1993 |
| 5224357 | Modular tube bundle heat exchanger and geothermal heat pump system A geothermal heat exchanger having modular tube bundles is provided in a novel heat pump system. The modular tube bundles are particularly adapted to be placed within a narrow excavation in the ground, such as a trench excavated using a backhoe bucket, wh... | 07/06/1993 |
| 5220792 | Method of and means for extracting heat from a hot fluid containing foreign material that interferes with heat transfer A method is provided for extracting heat from a hot liquid containing scaling material whose solubility is proportional to the temperature of the liquid. The method includes providing a pond containing a liquid, and locating in said pond a vertical tube h... | 06/22/1993 |
| 5216577 | Stable thermal enclosure for outdoor electronics An enclosure for our door electronics having an underground ground sleeve for providing a heat exchanger between the surrounding ground and a first fluid circuit. The enclosure also includes an ambient single pass fluid circuit. The geothermal fluid circu... | 06/01/1993 |
| 5209286 | Ground open-air heat exchange, open-air conditioning system, and method An underground air conditioning apparatus for underground cooling outside air directed into a space comprising an open-air inlet for admitting outside air including air quality control apparatus including an above ground intake and a below ground outlet m... | 05/11/1993 |
| 5203173 | Device for utilization of geothermal energy The device proposed has a pipe (3) sunk into the Earth's crust and designed to convey to the surface a fluid heated by geothermal energy, possibly in vapor form. The device also has a second, outer, pipe (2) surrounding the conveyor pipe and designed to c... | 04/20/1993 |
| 5199198 | Apparatus and method for snow disposal There is disclosed a method and apparatus for disposal of snow in urban areas. Snow is disposed of using existing manhole or other connections to sewer systems with a portable or mobile disposal unit formed of a snow receiving bin, a grinding device, appa... | 04/06/1993 |
| 5190098 | Thermosyphon with evaporator having rising and falling sections A thermosyphon for removing heat from a permafrost foundation is composed of a sealed container containing an easily vaporizable liquid. The container has a condenser part, which is exposed to temperatures below the condensation temperature of the liquid,... | 03/02/1993 |
| 5183100 | System for efficiently exchanging heat or cooling ground water in a deep well A novel ground water heat transfer system is provided for low cost and high efficiency heat pumps and includes a deep well filled with water. An insulating sleeve which is smaller than the diameter of the deep well is placed in the center of the deep well... | 02/02/1993 |
