Comparison of Two kinds of Indirect Evaporative Cooling System: to Pro-duce Cold Water and to Produce Cooling Air

摘要

Indirect evaporative cooling system to produce cold water and indirect evaporative cooling system to produce cooling air are compared in this paper. From the process transformation, to remove the same quantity of indoor heat, the indirect evaporative air cooler system produces much more cooling energy in which more than a half is wasted to cool fresh air and also more heat transfer area are used. Also the transportation electricity consumption is much higher when using cooling air than using cold water. Two real applications are given, from the field testing data, the system COP of the indirect evaporative cooling system to produce cold water was 4.6～5.9, which is 1～2 higher than the system COP of the system to produce cooling air. Thus, using the indirect evaporative chillers to produce cold water to remove indoor sensible heat is better than using the indirect evaporative air coolers to produce cooling air.