The experimental investigation of a double pipe heat exchanger installed inside a split-type air-conditioning system

Abstract

This research aimed to study effects of a double-pipe heat exchanger which installed inside a 24000-BTUh split-type air-conditioning (A/C) system. The heat exchanger was used to exchange heat between low temperature refrigerant inside the suction line (the refrigerant tube between the evaporator and the compressor) and high temperature refrigerant inside the liquid line (the refrigerant tube between the receiver tank and the refrigerant flow control valve). The A/C power consumptions with and without the heat exchanger installed were measured. This study also investigated the A/C power consumptions when the A/C system was applied with the heat exchanger coupled with fabric drying application which induced the evaporative heat transfer effect at the condensing unit in 4 different weather conditions; the normal and rainy daytime and nighttime. From the experimental results, the A/C system with the heat exchanger consumed power less than the system without the heat exchanger in all weather conditions. Remarkably, during the nighttime, the A/C system with the heat exchanger consumed power notably less than that of the system without the heat exchanger. The A/C system with the heat exchanger coupled with the drying application consumed power less than that of the system without the heat exchanger but with the drying application in all weather conditions. © 2018 International Heat Transfer Conference. All rights reserved.