A heat exchanger duct includes a wall having ends spaced along a central axis. An inlet manifold is positioned within a downstream portion of the duct at a radially outward location. An outlet manifold is positioned within an upstream portion of the duct at a radially outward location. At least one of the inlet and outlet manifolds extend at least 10 degrees around the circumference of the duct. A central manifold is disposed between the inlet and outlet manifolds, and radially inwardly of the inlet and outlet manifolds. Heat exchanger entrance elements extend radially inward from the inlet manifold to the central manifold, and heat exchanger exit elements extend radially outward from the central manifold to the outlet manifold. A gas turbine engine is also disclosed.

A heat exchanger duct includes a wall having ends spaced along a central axis. An inlet manifold is positioned within a downstream portion of the duct at a radially outward location. An outlet manifold is positioned within an upstream portion of the duct at a radially outward location. At least one of the inlet and outlet manifolds extend at least 10 degrees around the circumference of the duct. A central manifold is disposed between the inlet and outlet manifolds, and radially inwardly of the inlet and outlet manifolds. Heat exchanger entrance elements extend radially inward from the inlet manifold to the central manifold, and heat exchanger exit elements extend radially outward from the central manifold to the outlet manifold. A gas turbine engine is also disclosed.

Apparatus and method for maintaining temperature in a sub-sea device, in particular in relation to fluid in the device. A material having a high latent heat on phase change is used to release latent heat to the fluid when the fluid temperature decreases towards a threshold value.

Apparatus and method for maintaining temperature in a sub-sea device, in particular in relation to fluid in the device. A material having a high latent heat on phase change is used to release latent heat to the fluid when the fluid temperature decreases towards a threshold value.

An evaporator for environmental test chamber includes a plate-type fin and plurality of pipelines wherein: the pipelines are divided into three types: refrigerating pipelines, dehumidifying pipelines and defrosting pipelines; the refrigerating pipelines are arranged alternately one by one, more by more, and one by more with the dehumidifying pipelines in transverse direction of a plate surface of the plate-type fin; refrigerating pipelines receive a refrigerating refrigerant supplied from a refrigerating-system, the dehumidifying pipelines receive dehumidifying refrigerant supplied from a dehumidifying-system, and defrosting pipelines receive hot air discharged from the dehumidifying-system compressor exhaust hole. The evaporator is simultaneously used for refrigerating and dehumidifying, and refrigerating and dehumidifying share the evaporator's whole evaporation area, and at least one evaporator pipeline is remained to serve as the defrosting pipelines, guiding the hot air output from the compressor of the dehumidifying-system to the evaporator to heat the evaporator surface to achieve the defrosting effect.

An evaporator for environmental test chamber includes a plate-type fin and plurality of pipelines wherein: the pipelines are divided into three types: refrigerating pipelines, dehumidifying pipelines and defrosting pipelines; the refrigerating pipelines are arranged alternately one by one, more by more, and one by more with the dehumidifying pipelines in transverse direction of a plate surface of the plate-type fin; refrigerating pipelines receive a refrigerating refrigerant supplied from a refrigerating-system, the dehumidifying pipelines receive dehumidifying refrigerant supplied from a dehumidifying-system, and defrosting pipelines receive hot air discharged from the dehumidifying-system compressor exhaust hole. The evaporator is simultaneously used for refrigerating and dehumidifying, and refrigerating and dehumidifying share the evaporator's whole evaporation area, and at least one evaporator pipeline is remained to serve as the defrosting pipelines, guiding the hot air output from the compressor of the dehumidifying-system to the evaporator to heat the evaporator surface to achieve the defrosting effect.

A heat exchanger for heat exchange between air and a heat exchange medium includes a plurality of heat transfer conduits arranged parallel to each other as flow paths for the heat exchange medium and a plurality of fin members. The fin members are configured to provide: an air inlet end for air inflow, an air outlet end for air outflow, and an air flow path. The air flow path connects the air inlet end with the air outlet end and allows a heat exchange with the plurality of heat transfer conduits. Each fin member includes a plurality of undulation troughs coplanar with each other and connected together so as to define a water condensate flow path. Each water condensate flow path has a flat bottom which extends from the air inlet end to the air outlet end.

A heat exchanger for heat exchange between air and a heat exchange medium includes a plurality of heat transfer conduits arranged parallel to each other as flow paths for the heat exchange medium and a plurality of fin members. The fin members are configured to provide: an air inlet end for air inflow, an air outlet end for air outflow, and an air flow path. The air flow path connects the air inlet end with the air outlet end and allows a heat exchange with the plurality of heat transfer conduits. Each fin member includes a plurality of undulation troughs coplanar with each other and connected together so as to define a water condensate flow path. Each water condensate flow path has a flat bottom which extends from the air inlet end to the air outlet end.

Embodiments of the present invention relate to compressed gas storage units, which in certain applications may be employed in conjunction with energy storage systems. Some embodiments may comprise one or more blow-molded polymer shells, formed for example from polyethylene terephthalate (PET) or ultra-high molecular weight polyethylene (UHMWPE). Embodiments of compressed gas storage units may be composite in nature, for example comprising carbon fiber filament(s) wound with a resin over a liner. A compressed gas storage unit may further include a heat exchanger element comprising a heat pipe or apparatus configured to introduce liquid directly into the storage unit for heat exchange with the compressed gas present therein.

Embodiments of the present invention relate to compressed gas storage units, which in certain applications may be employed in conjunction with energy storage systems. Some embodiments may comprise one or more blow-molded polymer shells, formed for example from polyethylene terephthalate (PET) or ultra-high molecular weight polyethylene (UHMWPE). Embodiments of compressed gas storage units may be composite in nature, for example comprising carbon fiber filament(s) wound with a resin over a liner. A compressed gas storage unit may further include a heat exchanger element comprising a heat pipe or apparatus configured to introduce liquid directly into the storage unit for heat exchange with the compressed gas present therein.