Performance of Air Conditioning Heat Exchangers PDF

Keywords

heat exchangers, fin tube coil, wind tunnel

Abstract

This paper presents a new graphical method for designing air conditioning heat exchangers. This method is fast, simple and accurate. It gives a direct solution utilizing only the psychometric chart. It gives also a direct determination of the boundary temperature at which dehumidification begins for that type of that type of problem where a portion of the surface is in a dry condition. In order to verify the developed technique an experimental test rig was installed. The data were collected for a heat exchanger, which consist mainly of a standard four-row integral fin tube coil. The coil was fitted in an experimental wind tunnel allowing facilities of measuring and varying the main operating variables and conditions which bear effects on cooling coil performance. The test results show a good agreement with the predicted ones, and the average deviation for the total heat is about +15% and for sensible heat is +9%, which are of positive nature and on the safe side for practical design purpose. The method is useful for similar practical applications