Experimental Investigation of Evaporative Condensed Refrigerating System by Variation of Heat Transfer Tube Types

This paper presents an experimental investigation of heat transfer enhancement in an evaporative condenser, where the tubes are remodeled with round, elliptical and twist types. The result shows that the heat transfer coefficients of the elliptical and the twisted tubes are higher than that of the round one of 10.2%-18.0% and 14.6%-28.9%, respectively. And then the evaporative-cooled chiller is introduced to a demonstration project to replace the initial water-cooled one. The tests for cold source system with the evaporative-cooled chiller show that the energy-conservation rate is 16.3% and the water-conservation rate is 39.7%, better than that of cold source system with the water-cooled chiller.