抄録
This paper describes a method to calculate an exergy-entropy process associated with the evaporation of water, one of the important phenomena used in building environmental control systems, and a result of simple example calculation is discussed. We classified the exergy of humid air into "warm", "cool", "wet" and "dry" exergies. According to this classification, a certain amount of liquid-water in humid air as its environment contains "wet" exergy and either "warm" or "cool" exergy. The amount of "wet" exergy is generally much greater than that of "warm" or "cool" exergy in typical air-condition processes. It was found that the evaporative cooling is a process that consumes the "wet" exergy of water to produce the "cool" exergy. A numerical example showed that the "cool" exergy produced is about 8% of the "wet" exergy.
