Engineering of dew-point evaporative coolers

The concept of dew-point evaporative cooling brings about a new theoretical limit to evaporative cooling, attracting many research and engineering efforts to realize it in practice. The successful scientific progress of the dew-point evaporative cooler requires the excellent integration of many multiple disciplines. This chapter judiciously documents the engineering pathway in the development of dew-point evaporative cooling, highlighting the major points to consider to achieve efficient cooling. Different flow regimes, channel shapes, structural materials are tested during the design of the heat and mass exchangers. The geometric and operating conditions of the heat and mass exchangers must be determined according to the designated ambient conditions. In addition, the dew-point evaporative coolers can operate in different modes in order to optimize the fresh air intake or heat recovery from the room return air.