The impact of the tubular indirect evaporative cooler length on the cooling effect

The tube length which influences the cooling effect of the indirect evaporative cooler has been analyzed by theoretical analysis and experiment test.The indirect evaporative cooler which tube length is 1m and 1.5m has been tested.According to the test results,the wet bulb efficiency of this evaporative cooler is calculated.It is shown that the better wet bulb efficiency is 55.6%.But compared to the heat exchange tube length of 1.5m tubular indirect evaporative cooler,there are about 10.4% lower in the efficiency.Therefore,the application of the 1.5m tube length indirect evaporative cooler should be take into account first.