An evaporative HVAC apparatus is disclosed for use in a vehicle air conditioning system. In at least one embodiment, the apparatus provides a housing positioned substantially in front of a vehicle evaporator and having an inner surface that defines an air passage extending therethrough. At least one thermal core is positioned within the housing. The at least one thermal core comprises at least one absorbent wicking layer sandwiched between a pair of substantially planar thermal layers. At least one fluid line is in fluid communication with the at least one wicking layer. Thus, as air from a vehicle blower moves through the evaporator and subsequently through the housing, a fluid is selectively delivered to the at least one wicking layer through the at least one fluid line which, in turn, permeates each of the thermal layers and evaporates into the air located immediately adjacent an exposed first surface of each of the thermal layers, thereby affecting the temperature of said air before it enters a cabin area of the vehicle.

The present disclosure relates to an air handling system which has a fan supply section for intaking warm air from a room environment, and first and second indirect evaporative cooling subsystems (IDECs) spaced apart from one another to form an air plenum and a hot aisle in communication with the air plenum. The air plenum and the hot aisle are both formed between the IDECs, with the air plenum communicating with the fan supply section to receive the warm air. The IDECs receive the warm air and cool the warm air to produce first and second cooled airflows. The system also includes spaced apart cold aisles adjacent each of the IDECs for channeling the cooled airflows into an evaporator section. The evaporator section produces a final cooled airflow which is directed back into the room environment.

A falling film evaporator (12) for a heating ventilation and cooling (HVAC) system includes a housing (52) and a plurality of evaporator tubes (26) positioned at least partially in the housing (52) through which a volume of thermal energy transfer medium is flowed. A distribution system (34) is located in the housing to distribute a flow of liquid refrigerant (20) over the plurality of evaporator tubes (26). The distribution system (34) includes a distribution vessel having a plurality of drip openings (38) to flow the liquid refrigerant onto the plurality of evaporator tubes (26), a feed pipe (42) to flow refrigerant into the distribution box (36), and one or more pressure regulators (58) in the distribution system, thereby regulating the flow of liquid refrigerant.

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.

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.

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.

The present invention relates to a novel split level sorption refrigeration system. In particular, the present invention provides a split level sorption based unit as a novel method of using the traditional sorption based refrigeration unit. The present invention offers orientation free configuration with efficient cooling power delivery to the various cooling load locations which is achieved by splitting the evaporator of the sorption chiller from the sorption beds and the condenser.

The present application provides an evaporator, comprising: a housing; and a falling film tube bundle disposed in an accommodating cavity and arranged in columns, the falling film tube bundle comprising a plurality of heat exchange tubes, the centers of the heat exchange tubes in each column being arranged along a height direction, and the centers of two adjacent heat exchange tubes in adjacent columns being staggered in a width direction of the accommodating cavity; wherein the falling film tube bundle is configured in a way that among four adjacent heat exchange tubes in two adjacent columns, a minimum distance between outer surfaces of at least two heat exchange tubes in different columns is greater than a minimum distance between outer surfaces of two heat exchange tubes in the same column. In the present application, a flow rate of gas flowing among the corresponding heat exchange tubes is reduced by increasing the flow space of a refrigerant in the width direction W, so that a ratio of the gas phase Reynolds number Re.sub.v to the liquid film Reynolds number Re.sub.film is reduced, and thus the heat exchange efficiency of the evaporator is improved.

An evaporative HVAC apparatus is disclosed. In at least one embodiment, the apparatus provides an at least one absorbent wicking layer having a first surface and an opposing second surface, and an at least one thermal layer also having a first surface and an opposing second surface. The second surface of the at least one thermal layer is formed immediately adjacent to the first surface of the at least one wicking layer. An at least one fluid line is in fluid communication with the at least one wicking layer. Thus, a fluid is selectively delivered to the wicking layer through the at least one fluid line which, in turn, permeates the at least one thermal layer and evaporates into the air located immediately adjacent the exposed first surface of the at least one thermal layer, thereby affecting the temperature of the air.

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.