An evaporative cooling system includes a porous ceramic body with a plurality of dry channels and a plurality of wet channels. The plurality of dry channels are configured to inhibit transfer of water vapor into the dry channels and include a barrier layer that includes a roughened layer with a features size less than 1000 nm and a hydrophobic chemical modification disposed on the roughened layer. The plurality of wet channels are configured to allow transfer of water vapor.

Chiller control systems and methods for chiller control use iterative modeling of cooling towers, heat exchangers, and pumps to determine the feasibility of integrated free cooling and the ability to take advantage of free cooling. The control systems and control methods can further include selecting the parameters for operating in the free cooling or integrated free cooling mode to improve efficiency and/or reduce energy consumption when operating in these modes. The models can have inputs and outputs that feed into one another, and converge at a solution over multiple iterations. The feasibility of integrated free cooling can be based on providing cooling to a cooling load process fluid at a heat exchanger. The availability of free cooling can be based on the cooling provided at the heat exchanger achieving a target temperature for the cooling load process fluid.

A water savings system and method for reducing the amount of water needed for adiabatic cooling including the use of a softener and a reverse osmosis device, in which tap water, softened if necessary, is delivered to a reverse osmosis device and softened water alone, reverse osmosis reject water, or softened water combined with reverse osmosis reject water is delivered to spray nozzles for cooling, and reverse osmosis pure water is stored and used periodically to flush the coils to inhibit and/or prevent corrosion from dissolved salts and other solids in the spray water.

An air conditioning device includes a duct module and a heat exchange module. The duct module includes a temperature control unit disposed at a second region of the duct module, a first air flow guide unit disposed between a first region and the second region of the duct module, and a first liquid energy conducting element disposed at the first region of the duct module. The heat exchange module has a delivery duct, an accommodating case, a driver unit, a second air flow guide unit, a heat exchanger and a second liquid energy conducting element. The driver unit drives condensed water to pass through the delivery duct. The second air flow guide unit provides an air flow to the heat exchanger for exhausting waste heat. The second liquid energy conducting element performs heat exchange to cool down.

The technology disclosed is a two stage Indirect/Direct Evaporative Cooling (IDEC) cycle whose novel closed loop topology compels system convergence to a stable operating state, wherein air cooling takes place mostly in the indirect stage. The direct stage then serves principally as a water chiller for that process.

A cylindrical humidifier, including a housing, a water tank, an atomization assembly, and a water feed assembly. The water tank is mounted in the housing, and is detachably connected to the atomization assembly. A lower end of the atomization assembly is arranged in the housing while an upper end thereof is detachably connected to a top end of the housing. The water feed assembly is mounted at the bottom of the atomization assembly and the water tank. The water feed assembly includes a lever bracket, a sealing bar, a pushing block, a spring, a pushing ball, a pushing bar, and a float. Water entering the water tank is controlled through the water feed assembly, so that the humidifier can maintain a constant water depth, and is always kept in the best working state, thereby achieving the maximum atomization efficiency.

An air conditioner controlling method includes: deciding on a supply-air temperature Ts and a return-air temperature Tr as specified design values; deciding that the total heat-exchange efficiency η is zero; selecting two or more stepped levels of the outdoor-air volume percentage α; deriving a linear function which expresses a relation between an outdoor-air temperature To and a mixed-air temperature Tm for each level of the outdoor-air volume percentage α by using the return-air temperature Tr and the total heat-exchange efficiency η; and deciding on the range where the mixed-air temperature Tm is lower than the supply-air temperature Ts for each of the linear functions and the range where the mixed-air temperature Tm in each linear function comes closest to the supply-air temperature Ts as compared with the mixed-air temperatures Tm in the other linear functions.

An air-conditioning device is provided, having a plurality of duct modules and a power module. Each of duct modules has a first end, a second end opposite to the first end, a temperature adjusting unit, and a first airflow guiding unit. The temperature adjusting unit has a first side configured for generating a first temperature range and a second side opposite to the first side configured for generating a second temperature range. The first airflow guiding unit is disposed at the first end or the second end of the duct module configured for guiding an airflow to enter through the first end, pass through the first side or the second side, and exit from the second end. The power module provides power required for operations of the temperature adjusting unit and the first airflow guiding unit.

A humidifier includes a container for containing a fluid; a cartridge for nebulizing the fluid, the cartridge configured to be fixed inside the container, the cartridge including a cartridge housing including a bottom side that is configured to contact a bottom of the container, a top side opposite to the bottom side; a back side; a front side; a left side; and a right side; and a handle on the top side of the cartridge housing, the handle projecting upward and away from the cartridge housing.

A device for realizing a cooling effect in a space comprises: a housing with a heat-conducting wall, which housing bounds a chamber through which air can flow; an air inlet which connects to the chamber and to said place, —an air outlet connecting to the chamber; air transport means for transporting air from the air inlet via the chamber to the air outlet; and moistening means for moistening the inner surface of the wall; this such that air supplied by the air transport means is introduced into the chamber via the air inlet, passes along the moistened inner surface of the wall in the chamber and is discharged from the chamber via the air outlet, whereby the water present on the inner surface of the heat-conducting wall evaporates and is entrained by the air flowing by, and the wall is cooled.