An HVAC system includes a refrigerant sub-system and an air treatment sub-system. The air treatment sub-system includes a three-way heat exchanger. The HVAC system is operable to circulate heat transfer fluid between the heat exchanger and the refrigerant sub-system. The heat exchanger includes panel assemblies, heat transfer fluid inlet and outlet manifolds, and a heat transfer fluid inlet and outlet. Each panel assembly includes a heat transfer fluid channel and a desiccant channel separated from the heat transfer fluid channel. The inlet and outlet manifolds are connected to the heat transfer fluid channel of each panel assembly, and each extend between lateral sides of the heat exchanger. The inlet manifold is closed at a first lateral side and connected to the inlet at a second lateral side, and the outlet manifold is closed at the second lateral side and connected to the outlet at the first lateral side.

A method for cool drying gas by guiding gas through the secondary section of a heat exchanger whose primary section forms the evaporator of a closed cooling circuit in which a coolant can circulate by means of a compressor that is followed by a condenser and expansion means through which the coolant can circulate, whereby use is made of an air-cooled condenser with a frequency controlled fan, and the method comprises the step of controlling the speed of the aforementioned fan so that the condenser pressure is kept equal to a target value.

A method of manufacturing a heat exchanger, include the steps of: (a) providing two plates configured to be assembled together, each of the plates comprising a support layer and a cap layer laminated over the support layer at least at a front side of the plate; (b) heat bonding a microporous membrane layer to one or more select portions of the cap layer on the front side of each plate such that a liquid desiccant channel is formed between the membrane layer and the front side of each plate; and (c) attaching the front sides of the plates together to form a plate pair structure by heat bonding one or more select portions of the cap layers on the front sides of the plates such that the membrane layers on the plates face each other and an air flow channel is formed between the membrane layers.

A regeneration system including a liquid desiccant regeneration loop comprising a liquid desiccant tank and a heat and mass exchanger; and a heating loop comprising a first heating zone and a second heating zone, where temperatures in the first heating zone are higher than temperatures in the second heating zone. The low concentration liquid desiccant in the liquid desiccant tank flows sequentially from the second heating zone to the first heating zone then through the heat and mass exchanger before being stored as high concentration liquid desiccant, and a portion of the low concentration liquid desiccant exiting the first heating zone or the second heating zone is used as a heating fluid for the heat and mass exchanger. A method of operating such a regeneration system is also provided.

The disclosure relates to heat and mass exchangers. In some examples, a heat-mass exchanger includes a plurality of regeneration fins extending generally vertically, and a plurality of desiccant feed tubes extending generally horizontally. The heat-mass exchanger also includes a plurality of regenerator heating tubes extending generally horizontally. The plurality of desiccant feed tubes are positioned above the plurality of regenerator heating tubes. In addition, the plurality of desiccant feed tubes and the plurality of regenerator heating tubes extend through the plurality of regeneration fins. Further, the plurality of desiccant feed tubes include feed tube openings adapted for delivering liquid desiccant onto surfaces of the plurality of regeneration fins.

The disclosure relates to parallel plate assemblies for heat exchangers. In some examples, a plate assembly includes a first plate. The first plate includes a first side that defines a side of a conditioning channel. In addition, the conditioning channel is configured to receive a flow of process air from a first end of the plate assembly and output a flow of conditioned air from a second end of the plate assembly. The first plate also includes a second side, opposite the first side, that defines a side of an exhaust channel. The exhaust channel is configured to receive a flow of heat sink air and at least a portion of the flow of conditioned air, and output a flow of exhaust air.

The disclosure relates to stratification tank systems for heat exchangers. In some examples, a stratification tank system includes an outer tube, and a plurality of baffles within the outer tube configured to divert a flow of a first fluid from side-to-side through the outer tube. The stratification tank system also includes a plurality of inner tubes within the outer tube that extend through the plurality of baffles. In addition, each of the plurality of inner tubes is configured to flow a second fluid from a first end of the outer tube to a second end of the outer tube and into a diffusion chamber comprising a plurality of diffusion openings. Further, the plurality of diffusion openings are configured to flow the second fluid into a storage tank.

Heat exchanger for exchanging heat between at least two fluids which are guided through chambers of the heat exchanger (1), wherein at least one guiding profile (11) is provided in the chambers (19,20), and the guiding profile (11) is an extruded tubular profile (12) which includes two parallel walls (13) which are connected to one another by means of two sidewalls (14). One or several dividing walls (15) extend in the extrusion direction of the tubular profile (12). One or several passages (17) are provided in the dividing walls (15) and/or in the sidewalls (14) for guiding a fluid.

A heat exchange system includes a core of cross flow passages having a reheater, and a condenser that is downstream of and directly interfaces the reheater. A first water extractor is downstream of the condenser, wherein the first water extractor turns a first fluid from the first pass of the condenser back towards the condenser and produces a second fluid that flows into the second pass of the condenser. A second water extractor is downstream the condenser, wherein the second water extractor turns a third fluid from the second pass of the condenser towards the reheater; and produces a fourth fluid that flows into the reheater.

A method of manufacturing a total heat exchange element includes bonding a liner sheet and a corrugated sheet together to prepare a piece of single-faced corrugated cardboard and stacking plural pieces of the single-faced corrugated cardboard obtained in the previous step so that corrugated stripe directions of respective two adjacent pieces of single-faced corrugated cardboard are allowed to cross with each other, wherein a moisture absorbent is contained in at least a part of each of the liner sheet and the corrugated sheet, and R1 is 1 to 20 g/m.sup.2 and R1/R2 is 0.5 to 2.0 when, before pieces of single-faced corrugated cardboard are stacked, the content of the moisture absorbent in the liner sheet and the content of the moisture absorbent in the corrugated sheet are defined as R1 and R2, respectively.