A heat pipe includes an insulating hollow body located inside an outer conductor. The insulating hollow body insulates a portion of the heat pipe on an outer conductor side and a portion of the heat pipe on an inner conductor side from each other. The heat pipe has a plurality of sections each connecting a corresponding one of a plurality of connection conductors to the insulating hollow body. The heat pipe further includes a communication path connecting portions of the heat pipe to each other to cause the plurality of sections to be in communication with each other. Each of the portions is connected to a corresponding one of the plurality of connection conductors.

A two-start helical heat exchanger comprises a helical baffle extending along a length of the heat exchanger and having first and second surfaces, wherein: the first surface of the baffle is arranged to provide a first helical fluid flow path for a first fluid; and the second surface of the baffle is arranged to provide a second helical fluid flow path for a second fluid, wherein the second fluid flow path is arranged in counter-flow with the first fluid flow path and a casing within which the baffle is mounted. The baffle is arranged such that first and second fluid flow paths are in thermal contact with each other through the baffle, and in thermal contact with the casing. The heat exchanger may be incorporated into a power converter, for example to cool the power converter. The heat exchanger may be used on an aircraft.

A pumped heat energy storage (PHES) system, involving an annular ducting arrangement is provided. Disclosed embodiments are believed to resolve the issue of containing a high temperature working fluid at elevated pressure by appropriately compartmentalizing by way of the annular ducting arrangement the functions of temperature management and pressure containment in a cost-effective and reliable manner.

A method of conditioning wastewater includes flowing wastewater into and through a first fluid tube and flowing a heat transfer fluid into and through a second fluid tube. The heat transfer fluid entering the second fluid tube has a different temperature than the wastewater entering the first fluid tube. The first fluid tube and said second fluid tube are positioned within a first casing that is surrounded by insulation. The first casing and the insulation are positioned within a second casing. The wastewater in said first fluid tube and said heat transfer fluid in said second fluid tube are arranged to allow heat transfer between the wastewater in said first fluid tube and the heat transfer fluid in said second fluid tube.

A pumped heat energy storage (PHES) system, involving an annular ducting arrangement is provided. Disclosed embodiments are believed to resolve the issue of containing a high temperature working fluid at elevated pressure by appropriately compartmentalizing by way of the annular ducting arrangement the functions of temperature management and pressure containment in a cost-effective and reliable manner.

A micro channel type heat exchanger in which a first heat exchange module and a second heat exchange module are stacked, the micro channel type heat exchanger including a plurality of flat tubes disposed within the first heat exchange module and the second heat exchange module, and a heat blocking member configured to form a heat blocking space by separating the first heat exchange module and the second heat exchange module, wherein the heat blocking member forms a heat blocking space between the first heat exchange module and the second heat exchange module that minimizes heat conductivity and improves thermal exchange performance of the heat exchanger.

The present discloses a gas-gas high-temperature heat exchanger, including a shell (12), a tube sheet (5), a low-temperature gas inlet pipeline (6) and an outlet pipeline (7), and a high temperature gas outlet (8), the tube is divided into a first heat transfer zone (1) and a second heat transfer zone (2), a low temperature gas (4) flows in the tube, the tube includes a insert component (9) and an outer fin (10); a heat transfer tube in the second heat transfer zone (2) has a sleeve structure, a high-temperature gas (3) flows in the core tube (13), the low temperature gas (4) flows in an annular region between the core tube (13) and an outer tube (14), the high-temperature gas (3) flows out of the core tube (13) and flows into the shell-side area of the second heat transfer zone (2) again.

A heat pipe, a heat dissipation module, and a terminal device are disclosed. The heat pipe includes a heat pipe body and an ineffective portion that is integrally formed with the heat pipe body when the heat pipe is manufactured, where an inner side of a pipe wall of the heat pipe body has a porous capillary structure layer, the ineffective portion is located in at least a part of the periphery of the heat pipe body, and the ineffective portion is used as a mounting portion for fastening the heat pipe to another object. In a mounting process, a pressure needs to be applied only to the ineffective portion, so that the heat pipe body is not obviously affected. In this way, integrity of the porous capillary structure layer inside the heat pipe body is ensured while the heat pipe is fastened.

A geothermal well is provided including a first tube including at least one opening in a first depth; a second tube having a closed bottom in a second depth; and a third tube having a closed bottom in a third depth. The first tube is inside the second tube, which is inside the third tube, wherein the first tube has at least one opening in fluid communication with a first interspace between the first tube and the second tube; wherein the third depth and the first depth are smaller than the second depth. Through-holes are formed in the second tube above the bottom of the third tube, which allow fluid communication between the first interspace and a second interspace between the second tube and the third tube. A first sealing element and a heat insulating material are disposed in the first interspace above the through-holes.

Apparatus and methods directed to an assembly associated with a downhole tool, and including: a thermal housing; at least one internal component inside the thermal housing, wherein the at least one internal component comprises at least one thermally sensitive component; and a thermal isolation support connecting the at least one internal component to the tool. The thermal isolation support may comprise an additive manufacturing structural framework connected to the tool. The structural framework may include a plurality of structural members, with a majority of the plurality of structural members substantially non-parallel with a longitudinal axis of the downhole tool.