An air delivery system may include a housing, a first liquid-to-air membrane energy exchanger (LAMEE), and a desiccant storage tank. The housing includes a supply air channel and an exhaust air channel. The first LAMEE may be an exhaust LAMEE disposed within an exhaust air channel of the housing. The exhaust LAMEE is configured to receive the outside air during a desiccant regeneration mode in order to regenerate desiccant within the exhaust LAMEE. The desiccant storage tank is in communication with the exhaust LAMEE. The exhaust LAMEE is configured to store regenerated desiccant within the desiccant storage tank. The regenerated desiccant within the desiccant storage tank is configured to be tapped during a normal operation mode.

A method includes receiving moisturized air from a refrigerated room and absorbing, in a portion of a desiccant wheel, moisture from the moisturized air, wherein absorbing moisture from the moisturized air produces dehumidified air. The method further includes discharging the dehumidified air to the refrigerated room.

A dehumidifying air handling unit for a heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a housing, a hollow desiccant drum configured to rotate within the housing, and a heat exchanger disposed within the hollow desiccant drum. The hollow desiccant drum includes channels that extend through a sidewall that surrounds an interior space. A desiccant is provided in the channels. The heat exchanger is configured to cool air flowing through the interior space of the hollow desiccant drum. A method of conditioning air includes rotating a hollow desiccant drum within a housing and directing the air to pass through the hollow desiccant drum. The air passing through the hollow desiccant drum includes cooling, with the heat exchanger, the air in an interior space of the hollow desiccant drum, and adsorbing, with a desiccant, moisture from the air cooled by the heat exchanger

A desiccant cooling system includes a desiccant module mounted in a division plate to be rotatable and having a side mounted in a desiccant cooling path through which indoor air moves and another side mounted in a regeneration path through which outdoor air moves, a preliminary cooler mounted at an upstream of the desiccant module in the desiccant cooling path and configured to cool the indoor air flowing into the desiccant cooling path; and a main cooler mounted at a downstream of the desiccant module in the desiccant cooling path, and configured to cool the indoor air dehumidified by passing through the desiccant module and supply the cooled indoor air to an air-conditioning space, wherein a dew-point temperature of the indoor air dehumidified by passing through the side of the desiccant module is less than a temperature of the main cooler.

In a method and apparatus for conditioning air for an enclosure, a first ambient air stream is cooled by the cooling coil of a refrigerant cooling system to reduce its temperature and humidity content. The thus cooled and dehumidified air is then passed through a segment of a rotating desiccant wheel to reduce moisture content and increase temperature and is then supplied to the enclosure. The desiccant wheel is regenerated by the use of a second ambient air stream which is first heated with the condenser coil of the refrigerant system and then passed through the regeneration segment of the desiccant wheel. A bypass plenum is provided in the apparatus that selectively allows a third ambient air stream to be cooled in the plenum independent of the evaporator coil and desiccant wheel in the first plenum. That air stream is then supplied with the air treated in the first plenum to the enclosure.

Provided is a dehumidification apparatus with good energy efficiency. A moisture absorbing material (polymeric moisture absorbing material 24), which absorbs moisture and swells at a temperature not higher than a predetermined temperature sensitive point, while shrinking and releasing condensed water at a temperature higher than the temperature sensitive point as a result of phase transition, is formed so as to be divided into a plurality of segments which are made apart from each other during dehydration. A rotation motor (21) is used to move the moisture absorbing material (polymeric moisture absorbing material 24) between a moisture absorption region (14a) and a dehydration region (14b). In the dehydration region (14b), the moisture absorbing material (polymeric moisture absorbing material 24) is heated by the heater (25).

A desiccant cooling system includes a desiccant cooler including a desiccant cooling path through which air introduced from the outside passes, a desiccant dehumidifier on the desiccant cooling path to pass through air and remove humidity of the air, and a water cooling portion cooling cooling water by using the low-humidity air that has passed through the desiccant dehumidifier; and a vapor compression cooling device including a water cooled condenser disposed to be cooled by the cooling water cooled by the water cooling portion so as to condense a refrigerant flowing inside the water cooled condenser, wherein the refrigerant is circulated in the water cooled condenser.

An air conditioner disclosed herein includes a cooling/heating module including a thermoelastic material and an actuator applying tension to the thermoelastic material and a switching control section selectively applying or removing tension to/from the thermoelastic material.

An air conditioning apparatus comprises an inlet module, an airflow guiding module, a hygroscopic wheel a dehumidification heating module and an internal recirculation heating module. The airflow guiding module includes an air channel switching unit, an outflowing air channel in air communication with an external environment outside of an air-conditioning environment, and an inflowing air channel in air communication with the air-conditioning environment. The air conditioning apparatus of the present invention meets various requirements for air conditioning. In addition, when the air conditioning apparatus performs a dehumidification process, the hygroscopic wheel and the dehumidification heating module is applied to remove the moisture of the air conditioning flow of the inflowing air channel, and thus the relative humidity of the air-conditioning environment is directly reduced so as to increase the dehumidifying efficiency.

Systems and methods for controlling temperature and humidity within a space in a building. Outdoor air and return air from the space are passed through particular equipment in a particular order. Equipment includes a secondary direct-expansion refrigeration circuit, a recovery wheel, a primary cooling coil, secondary circuit evaporator and condenser coils, and a dehumidification wheel. Various embodiments include multiple zones, chilled beams, and a dedicated outdoor air supply (DOAS) subsystem delivering dehumidified air to active chilled beams. In various embodiments, supply air passes first through the recovery wheel, then through the primary cooling coil, then through the dehumidification wheel, and then to the space. Further, in some embodiments, exhaust air passes through the dehumidification wheel and then through the recovery wheel. Pump modules may supply chilled beams and control their temperature to avoid condensation. A chiller may supply cooling water to both the primary cooling coil and the pump modules.