The present invention relates to a single pipe collector for a heat pump installation. The collector comprises a pipe (12) intended for installation in a heat pump plant, in which pipe a heat transfer liquid circulates in a closed cycle for conveyance of heat that is absorbed from a heat source to a heat pump and return of the heat transfer liquid back to the heat source. The inward surface (14) of the pipe has an uneven surface structure that comprises indentations and/or elevations (16). The present invention also relates to heat pump plant comprising the collector.

The primary purpose of the present invention is to provide an fluid circulating installation adapted with a temperature equalization system and fluid transmission duct disposed in a heat carrier existing in solid or liquid state in the nature where presents comparatively larger and more reliable heat carrying capacity. The fluid passes through the solid or gas state semiconductor application installation to regulate the semiconductor application installation for temperature equalization, and flows back to the heat equalization installation disposed in the natural heat carrier of heat for the heat equalization installation providing good heat conduction in the natural heat carrier to provide the operation of temperature equalization regulating function on the backflow of the fluid.

An apparatus sometime referred to as a freeze pipe and methods of using these apparatus in ground freezing applications is provided. Ground freezing is a temporary ground support technique that is used extensively for groundwater control and ground stabilization in underground construction and deep excavations. The process involves circulating refrigerated liquids through a series of vertically disposed freeze pipes to freeze the ground creating a solid barrier that prevents water intrusion and provides structural support for excavation. The freeze pipes are directed to zone freeze pipes or the like, which cause the ground to freeze in selected segments along the pipe, also referred to as zones.

A heating device (1) comprising: an energy well (2), a heat pump (3) which is adapted to take up and transfer heat from the energy well (2) by the aid of a line from the energy well to the heat pump (3) for transport of anti-freeze liquid, a heat extraction device (4) connected to a heat pump (3) which selectively can be brought into a connected and a disconnected position, thaw coils (5) for thawing ground surrounding the thaw coils (5), in which the anti-freeze liquid is transportable, which thaw coils (5) selectively can be connected and disconnected to the line from the energy well to the heat pump (3), a heat exchanger (7) connected to the heat extraction device (4) adapted to selectively transfer heat to the thaw coils (5) by the aid of the heat extraction device (4), a control system (6) which is adapted for controlling the heating device (1) whereby low temperature heat from the energy well (2) alternatively high temperature heat from the heat pump (3) and the heat extraction device (4) selectively can be used for pre-heating, thawing, or maintenance heating ground surrounding the thaw coils (5).

A horizontal ground-coupled heat exchanger for a geothermal system. The underground portion of the system includes; at least one conduit located in the soil below its frost line containing a heat transfer liquid; at least one stratum between the at least one conduit and the soil, totally disposed beneath the surface of the soil at a depth from the surface of the soil of 1.2-3 m and completely separated from the soil by at least two layers of a thin thermo-conductive waterproof material, the at least one stratum containing heat conductive water saturated fill material with the at least one conduit being disposed therein; and a means to compensate for small leaks of water from the at least one stratum. The size of the smallest dimension of the stratum per conduit is determined; the sizing is based on a user selected stratum efficiency parameter employing a relation provided herein.

The present invention relates to a vertical relay fluid storage barrel installed with fluid inlet and fluid outlet for whole or in part placement into natural thermal energy body in vertical or downward oblique manner, wherein a thermal energy exchanger is installed inside the relay fluid storage barrel temporarily storing thermal conductive fluid for external flow, the thermal energy exchanger is installed with fluid piping for the thermal conductive fluid passing through, to perform heat exchange with the fluid in the relay fluid storage barrel, and the fluid in the relay fluid storage barrel performs heat exchange with the natural thermal energy body.

A method comprising (a) first, preparing a grout additive fluid comprising a fresh water base fluid and a grout additive control package comprising a primary additive selected from the group consisting of an inhibitor, a dispersant, a thermally conductive material, and any combination thereof, wherein at least about 90% of the dispersant and the inhibitor are dissolved in the fresh water base fluid; (b) second, introducing an aqueous swellable clay into the grout additive fluid, thereby forming a final grout fluid; and (c) third, introducing the final grout fluid into an annulus in a subterranean formation, the annulus formed between an exterior of a geothermal well loop tubular and the subterranean formation.

A system, including: a subsea pressure vessel; and a passive heat transfer apparatus, wherein the passive heat transfer apparatus penetrates a hull or shell of the subsea pressure vessel.

A hybrid geothermal power system is discussed. The system includes a geothermal system including power plant (101) and pumping station (102) and a nuclear plant (103). Pumping station (102) is used to inject fluid from reservoir (104) through an injection well (105) into the bedrock (106) (also referred to as the hot dry rock HDR zone) and extracted via a secondary bore (extraction well) usually coupled to the power plant (101). In the present example however the injection well is linked to the extraction well (107). As fluid is injected into the bedrock a drop in temperature occurs due to heat transfer to the fluid. Nuclear plant (103) is utilized to combat this drop, the plant (103) has the fissionable components (1091, 1092, 1093) of the reactor positioned within bores (1081, 1082, 1083) within the HDR zone.

Apparatus is provided having one or more SWEGS that may be configured to heat air in a draft power tower arrangement. In a closed loop, cold fluid may be pumped into the SWEGS and heated to a temperature in a range of e.g., 100 C.-300 C., and hot fluid pumped out of the SWEGS. This fluid flows through a heating element (e.g., a radiator or specially designed heat exchanger) that heats the air in the draft power tower arrangement.