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Normally the heat transfer between airstreams provided by the device is termed as 'sensible', which is the exchange of energy. - details see: https://www.machineto.com/desiccant-air-conditioning-10206112

Normally the heat transfer between airstreams provided by the device is termed as 'sensible', which is the exchange of energy, or resulting in a change in temperature of the medium (air in this case), but with no change in moisture content. However, if moisture or relative humidity levels in the return air stream are high enough to allow condensation to take place in the device, then this will cause heat to be released and the heat transfer material will be covered with a film of water. Despite a corresponding absorption of latent heat, as some of the water film is evaporated in the opposite airstream, the water will reduce the thermal resistance of the boundary layer of the heat exchanger material and thus improve the heat transfer coefficient of the device, and hence increase efficiency. The energy exchange of such devices now comprises both sensible and latent heat transfer; in addition to a change in temperature, there is also a change in moisture content of the air streams.