Thermological analysis of chilled water by evaporative cooling processes

By using the conversion principle of moisture entransy and sensible heat entransy in air-water heat and mass transfer processes, presents the thermological analysis of different kinds of evaporative cooling processes. Compares chilled water preparing by the direct evaporative cooling (DEC) process and the indirect evaporative cooling (IEC) process. Points out the essential cause for the difference in cooling capacity limits of the IEC and DEC processes from the aspect of entransy loss. Analyses two kinds of indirect evaporative chiller with different process structure under infinite and finite heat transfer area conditions by using the moisture entransy to sensible heat entransy conversion principle analysis. Under the finite heat transfer area condition, obtains the sensible heat entransy loss balance principle under constant conversion parameters of heat and moisture entransy, gives the optimization principle of inside heat transfer area distribution to each heat transfer or heat and mass transfer units, compares the structure of two kinds of indirect evaporative chiller, and attempts to acquire new understanding of the process structure from the aspects of system total transfer heat divided by the objective heat and the total entransy loss of heat or heat and mass transfer processes.