The present application provides a falling film evaporator. The falling film evaporator comprises a housing, a gas outlet, a cover, a gas flow channel, and a plurality of flow guide members. The housing has a length direction and a height direction, and the housing defines an accommodating cavity. The gas outlet is provided at the upper portion of the accommodating cavity. The cover is provided in the accommodating cavity and defines a cover accommodating cavity, the cover accommodating cavity has a lower cover opening located below, and the cover accommodating cavity is configured to accommodate at least one part of a heat exchange tube bundle. The gas flow channel is located between the housing and the cover and enables the lower cover opening of the cover accommodating cavity to be in communication with the gas outlet. The plurality of flow guide members are arranged in the gas flow channel along the height direction of the housing. Here, in the height direction of the housing, one of two adjacent flow guide members is connected to the housing and is separated from the cover by a certain distance, and the other of the two adjacent flow guide members is connected to the cover and is separated from the housing by a certain distance. The falling film evaporator in the present application has the advantage of being high in gas-liquid separation efficiency, and the machining process of the flow guide members of the falling film evaporator is simple.

A falling film evaporator includes a heat transfer tube bundle with a heat medium channeled to an interior, a tank with a refrigerant inflow port having the heat transfer tube bundle disposed in the tank, a liquid refrigerant sprinkling part arranged to drop liquid refrigerant onto the heat transfer tube bundle, a vapor outlet tube extending from an upper part of the tank, a cover having a portion positioned in a location inside the tank and higher than the liquid refrigerant sprinkling part, and an impeding member provided between the liquid refrigerant sprinkling part and the cover at a different position than the vapor outlet tube along the longitudinal direction of the heat transfer tubes. The impeding part impedes the flow of refrigerant that flows between the liquid refrigerant sprinkling part and the cover and flows in the longitudinal direction of the heat transfer tubes.

Embodiments of the present disclosure relate to a vapor compression system that includes a refrigerant loop, a compressor disposed along the refrigerant loop and configured to circulate refrigerant through the refrigerant loop, a condenser disposed downstream of the compressor along the refrigerant loop, where the condenser includes a plurality of tubes disposed in a shell and a diffusion area configured to enhance thermal energy transfer within the condenser, where the diffusion area is defined by a cavity of the condenser without a tube of the plurality of tubes, and an evaporator disposed downstream of the condenser along the refrigerant loop.

Embodiments of the present disclosure relate to a vapor compression system that includes a refrigerant loop, a compressor disposed along the refrigerant loop and configured to circulate refrigerant through the refrigerant loop, and a heat exchanger disposed along the refrigerant loop and configured to place the refrigerant in a heat exchange relationship with a cooling fluid. The heat exchanger includes a water box portion having a first length, a shell having a second length, a plurality of tubes disposed in the shell and configured to flow the cooling fluid, and a cooling fluid portion having a third length, where the water box portion and the cooling fluid portion are coupled to the shell, such that the first length, the second length, and the third length form a combined length of the heat exchanger that is substantially equal to a target length.

An evaporative HVAC apparatus is disclosed. In at least one embodiment, the apparatus provides an at least one housing having an inner surface that defines a substantially tubular-shaped air passage extending therethrough. An absorbent wicking layer is formed immediately adjacent to at least a portion of the inner surface of the housing, and a thermal layer is formed immediately adjacent to an inner surface of the wicking layer. The housing also provides an at least one fluid inlet aperture through which a fluid line extends a distance into the housing so as to be in fluid communication with the wicking layer. Thus, a fluid is selectively delivered to the wicking layer through the fluid line which, in turn, permeates the thermal layer and evaporates into the air located immediately adjacent an exposed inner surface of the thermal layer, thereby affecting the temperature of the air moving through the air passage.

A refrigeration system is provided, such as for use with chillers. The system uses a tube-side condenser, such as a microchannel condenser, along with a shell-side evaporator such as a falling film evaporator. A flash tank economizer is disposed between the condenser and the evaporator, and an inlet valve to the flash tank is controlled based upon subcooling of condensate from the condenser. The vapor exiting the flash tank may be fed via an economizer line to a system compressor. Liquid phase refrigerant combined with some gas phase refrigerant exits the flash tank and is directed through an orifice before entering the evaporator.

A falling film evaporator includes a heat transfer tube bundle with a heat medium channeled to an interior, a tank with a refrigerant inflow port having the-heat transfer tube bundle disposed in the tank, a liquid refrigerant sprinkling part arranged to drop liquid refrigerant onto the heat transfer tube bundle, a vapor outlet tube extending from an upper part of the tank, a cover having a portion positioned in a location inside the tank and higher than the liquid refrigerant sprinkling part, and an impeding member provided between the liquid refrigerant sprinkling part and the cover at a different position than the vapor outlet tube along the longitudinal direction of the heat transfer tubes. The impeding part impedes the flow of refrigerant that flows between the liquid refrigerant sprinkling part and the cover and flows in the longitudinal direction of the heat transfer tubes.

A heat exchanger of flooded type, having: a primary tube bundle, inside which a first hot operating fluid to be cooled down flows; a skirt, circumscribed to the primary tube bundle, which receives a second cold operation fluid which laps against the primary tube bundle in order to subtract heat to the first operating fluid, which second operating fluid flows inside the skirt along to a vertical longitudinal direction orthogonal to the development of the tubes of the primary tube bundle, and wherein the skirt has a prevalent development dimension (L) along the flow longitudinal direction of the second operating fluid; and nozzles for delivering the secondary operating fluid inside the skirt,
wherein an alternative configuration is provided using only the second operating fluid flooding the skirt by entering from a side inlet, without the presence of the above-mentioned nozzles, and an additional configuration using only the nozzles but not such side inlet.

An evaporative HVAC apparatus is disclosed. In at least one embodiment, the apparatus provides an at least one housing having an inner surface that defines a substantially tubular-shaped air passage extending therethrough. An absorbent wicking layer is formed immediately adjacent to at least a portion of the inner surface of the housing, and a thermal layer is formed immediately adjacent to an inner surface of the wicking layer. The housing also provides an at least one fluid inlet aperture through which a fluid line extends a distance into the housing so as to be in fluid communication with the wicking layer. Thus, a fluid is selectively delivered to the wicking layer through the fluid line which, in turn, permeates the thermal layer and evaporates into the air located immediately adjacent an exposed inner surface of the thermal layer, thereby affecting the temperature of the air moving through the air passage.

A heat exchange device and a cooling system are provided. The heat exchange device includes a low-pressure chamber and a high-pressure chamber disposed in the low-pressure chamber. The low-pressure chamber has a first wall for enabling heat exchange and an output portion in communication with the outside to output the low-pressure fluid. The high-pressure chamber has an input portion in communication with the outside to admit the high-pressure fluid and nozzles in communication with the low-pressure chamber. The fluid discharged from the nozzles undergoes a pressure drop and undergoes heat exchange through the first wall. Cooling capability is developed in the heat exchange device and works in the heat exchange device to thereby dispense with a pipeline which must be otherwise provided to link an expansion process and an evaporation process of the fluid and may otherwise cause cooling capability loss, so as to greatly enhance heat exchange capability and cooling efficiency.