Herein is detailed a 3-rotor drying system (30,40,50) for producing technical air having a very low dew point comprising three rotary desiccant dryers (2,21,22), each rotary desiccant dryer (2,21,22) comprising a drying sector (2a,21a,22a) and a regeneration sector (2b,21b,22b), the rotary desiccant dryers (2a,21a) arranged in sequence and sharing a common regeneration-air flow path (9) for passing regeneration-air through the respective regeneration sectors (2a,21b,22b) of the rotary desiccant dryers (2,21,22) and a common intake-air flow path (6,7) for passing intake-air through the respective drying sectors (2a,21a,22a) of the rotary desiccant dryers (2,21,22) for dehumidifying the intake-air to product-air having a very low dew point.

An air conditioning system and method of air conditioning is provided. The air conditioning system includes an intake mechanism configured to draw into the air conditioner a first amount of air and an amount of moisture from an exterior of the air conditioner. The system further includes metal organic frameworks in fluid communication with the intake mechanism, the metal organic frameworks configured to adsorb the amount of moisture from the first amount of air. The system further includes an indirect evaporative cooler configured to cool the first amount of air. The system further includes a solar heater configured to heat a second amount of air. The system further includes a heat exchanger configured to contact the second amount of air with the metal organic frameworks to regenerate the metal organic frameworks.

Methods and systems 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 or direct-expansion refrigeration circuit, secondary circuit coils, and a dehumidification wheel. Various embodiments include modulating the secondary circuit compressor to adjust reheat capacity at the secondary circuit condenser coil, a geothermal direct-expansion refrigeration circuit, a variable refrigerant flow subsystem, fan coil units, multiple zones, a dedicated outdoor air supply subsystem, an evaporative cooler, supplemental outdoor air, or a combination thereof. In some 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.

The present application discloses a humidification filter screen structure and a purifier, in particular, the purifier includes an air duct and a water tank arranged outside the air duct, and the humidification filter screen structure includes a cover body and a humidification filter screen assembly; the cover body includes an upper cover and a lower cover which are detachably connected, and the upper cover and the lower cover mutually enclose an mounting space; the humidification filter screen assembly is mounted in the mounting space, and the humidification filter screen assembly includes a water absorbing part and a humidification part which are connected with each other, the water absorbing part extends into the water tank, and the humidification part is communicated with the air duct.

An apparatus for capturing a water content from a water containing gas, the apparatus comprising: a housing having an inlet into which the water containing gas can flow; a water adsorbent located in the housing, the water adsorbent comprising at least one water adsorbent metal organic framework composite capable of adsorbing a water content from the water containing gas; and a water desorption arrangement in contact with and/or surrounding the water adsorbent, the water desorption arrangement being selectively operable between (i) a deactivated state, and (ii) an activated state in which the arrangement is configured to apply heat, a reduced pressure or a combination thereof to the water adsorbent to desorb a water content from the water adsorbent.

A dehumidifying element includes: a layered body in which a plurality of sheets supporting an adsorbent that dehumidifies air are stacked on one another, with gaps provided between adjacent ones of the plurality of sheets, the gaps allowing air to pass therethrough; a casing that holds the layered body; and a cushioning member provided between the casing and the layered body in a stacking direction in which the plurality of sheets are stacked on one another, the cushioning member being configured to expand and contract.

A cooling and desalination system, and a method for concurrent cooling and desalination are provided. The cooling and desalination system includes a humidification-dehumidification (HDH) system including a humidifier for humidifying a carrier gas using saline water, and a dehumidifier for dehumidifying the carrier gas to obtain desalinated water. The cooling and desalination system further includes a vapor-absorption refrigeration (VAR) system including an evaporator for evaporating a refrigerant and providing cooling effect, an absorber for absorbing the refrigerant by an absorbent, a desorber for heating the refrigerant and the absorbent to obtain vapors of the refrigerant, and a condenser for condensing the vapors of the refrigerant. Herein, the HDH system and the VAR system are connected at the absorber and the condenser so that the carrier gas, after passing through the humidifier, is configured to absorb heat from the absorber and the condenser, before entering the dehumidifier.

A conditioning system includes a humidity control system, a vapor compression system, and a heat exchanger. The humidity control system includes a first fan producing a first airflow, a first mass exchange device in the first airflow, a second fan producing a second airflow, and a second mass exchange device in the second airflow and in fluid communication with the first mass exchange device permitting a liquid desiccant to flow in a liquid desiccant loop. The vapor compression system includes an evaporator, and a condenser in fluid communication with the evaporator permitting a refrigerant to flow in a refrigerant loop. The heat exchanger has a first path in fluid communication with the humidity control system permitting the liquid desiccant to flow therethrough and a second path thermally coupled to the first path and in fluid communication with the vapor compression system permitting a refrigerant to flow therethrough.

Air gap insulation is a common means of providing thermal insulation from the environment. In many cases the air gap is heated by direct or indirect solar radiation, so ventilating this gap has a cooling effect. The invention cools this gap by integrating moisture-absorption material units that harvest water from the air during the night and provide evaporative cooling during the day. Compared to the ambient air, the daily relative humidity fluctuations in the air gap are more extreme, allowing a significant cooling effect. Furthermore, during the night, humidity absorption on the absorption unit reduces the risk of condensation within the air gap. Additionally the absorption process generates heat, and by using a controller processes of heating, cooling and dehumidifying can be activated when possible and needed.

A system passively cools, regulates humidity and/or rectifies diffusive transport of water vapor in an interior area within a structure. The system includes a membrane assembly covering a portion of the structure, wherein the membrane has an interior side facing the interior area and an exterior side. The membrane assembly defines a plurality of pores. When cooling, a supply of fluid is provided to the membrane assembly so that capillary action of the pores redistributes the fluid to create evaporation and, in turn, the desired heat flow. The membrane assembly can include an architectural membrane coated with a porous matrix coating to form the pores. A pump can provide the fluid to the interior side of the membrane assembly. Preferably, the architectural membrane is woven PTFE-coated fiberglass and the porous matrix coating is titanium dioxide, zeolites and/or silica gel.