The invention relates to a flat tube heat exchanger, in particular to a high-temperature flat tube heat exchanger for gaseous media, comprising a closed housing (5) having a tube bundle space (50) and a tube bundle, arranged in the tube bundle space (50) of the housing (5), comprising multiple flat tubes (2), there being arranged, in the flat tubes (2) and in the tube bundle space (50) between the flat tubes (2), corrugated strips (3, 6) having peaks (30, 60) and troughs (31, 61) extending in the longitudinal direction of the flat tubes (2), wherein the peaks (30, 60) and troughs (31, 61) respectively bear internally and externally against flat sides (200) of the flat tubes (2), and wherein there is provided a device for externally applying a surface pressure to the housing (5), at least in the region of the tube bundle space (50), this pressure being higher than a pressure (p1, p2) of the media guided in the flat tubes (2) or around the flat tubes (2).

In order to obtain a heating and cooling system capable of localized cooling or heating a given area, a heating and cooling system includes: a supply section configured to supply a heating medium; and a double pipe unit including: an inner pipe, connected to the supply section, through which the heating medium flows, and an outer pipe disposed at an outer peripheral side of the inner pipe, the outer pipe including a space between the inner pipe and the outer pipe, the space being maintained at a vacuum, portions in which a degree of vacuum of the space is different, or in which the degree of vacuum of the space is adjustable.

It is provided an underground structure, usable at least as a shelter, having a light weight substantially cylindrical portion, of a cylindrical casing having a weight to area ratio in the range of 8 to 30 kg/m2. The casing has a strength level and an impermeability level high enough for serving as part a sealable underground liquid storage tank and at least one sealable opening connecting it to external spaces. The cylindrical portion includes openings for entering and exiting the interior of the portion, and passageways communicate the structure with outside spaces. The surrounding ground provides a geo-thermal reservoir which is used to regulate by a flowing fluid the temperature of the shelter space, modules inside the shelter or above ground structures. The structure includes provisions for receiving of variety of auxiliary systems like an air-treatment system, communication system water and power supply.

It is provided an underground structure, usable at least as a shelter, having a light weight substantially cylindrical portion, of a cylindrical casing having a weight to area ratio in the range of 8 to 30 kg/m2. The casing has a strength level and an impermeability level high enough for serving as part a sealable underground liquid storage tank and at least one sealable opening connecting it to external spaces. The cylindrical portion includes openings for entering and exiting the interior of the portion, and passageways communicate the structure with outside spaces. The surrounding ground provides a geo-thermal reservoir which is used to regulate by a flowing fluid the temperature of the shelter space, modules inside the shelter or above ground structures. The structure includes provisions for receiving of variety of auxiliary systems like an air-treatment system, communication system water and power supply.

A condenser equipped with a refrigerant outlet configured to receive and store liquid refrigerant during an off-cycle is described. The refrigerant outlet may include an outflow pipe surrounded by a weir. The weir may include a port, through which liquid refrigerant in the weir can be directed to, for example, moving parts of the chiller for lubrication. The outflow pipe may extend vertically relative to the bottom of the condenser. In some embodiments, a first opening of the outflow pipe may be positioned higher than the bottom of the condenser in the vertical direction, while the weir may be positioned lower than the bottom of the condenser. Liquid refrigerant in the condenser can flow to and stay in the weir in an off-cycle. During a subsequent start-up, the liquid refrigerant in the weir can be directly quickly to moving parts of the chiller.

A condenser equipped with a refrigerant outlet configured to receive and store liquid refrigerant during an off-cycle is described. The refrigerant outlet may include an outflow pipe surrounded by a weir. The weir may include a port, through which liquid refrigerant in the weir can be directed to, for example, moving parts of the chiller for lubrication. The outflow pipe may extend vertically relative to the bottom of the condenser. In some embodiments, a first opening of the outflow pipe may be positioned higher than the bottom of the condenser in the vertical direction, while the weir may be positioned lower than the bottom of the condenser. Liquid refrigerant in the condenser can flow to and stay in the weir in an off-cycle. During a subsequent start-up, the liquid refrigerant in the weir can be directly quickly to moving parts of the chiller.

The present invention relates to a heat exchanger, a method for manufacturing the same, a heat recovery ventilator (HRV) including the same, and a method for defrosting and checking operations thereof.

At least one heat pipe is fixed to each of fin plates, a rectangular fin plate assembly is constituted of the fin plate, the fin plate and the fin plate of the plurality of respective radiation fin parts as the plurality of radiation fin parts are seen from the direction in which the heat pipes extend, the plurality of heat pipes include a first heat pipe group and a second heat pipe group, the first heat pipe group is positioned at the center in the longitudinal direction of the fin plate assembly, the second heat pipe group is positioned on both sides of the first heat pipe group in the longitudinal direction of the fin plate assembly, and the fin plate thermally connected to the first heat pipe group includes expanding parts.

The present technology provides a non-cylindrical structure for transporting media, including gases, liquids, solids, or energy comprising a layer of thermal pyrolytic graphite (TPG) surrounded by an outer layer and an inner layer comprising a metal, a ceramic, a glass, or a plastic. In particular, the present technology relates to a non-cylindrical tube or a pipe having an inner layer, an outer layer, and a layer of TPG between the inner layer and the outer layer wherein the TPG layer is configured to manage the direction of heat conduction.

A heat exchanger core consists of first and second fluid channels, each configured to direct flow of respective fluids through the heat exchanger core. Each first fluid channel includes first fluid flow assemblies having inner channels formed by inner channel walls that contain the first fluid, each inner channel surrounded by a barrier channel having a barrier channel wall that isolates the barrier channel from the second fluid. One or more barrier channel vanes support the inner channel within the barrier channel. Each barrier channel provides a void space between the inner channel wall and the barrier channel wall, thereby fluidly separating the first fluid from the second fluid. Each barrier channel can receive the first or second fluid in the event of a breach of the inner channel wall or the barrier channel wall, thereby preventing intra-fluid contamination.