Title: "Experimental Performance Analysis of an Automotive Air Conditioning and Heat Pump System using R134a with and without Internal Heat Exchanger"
         

DOI: 10.15224/978-1-63248-115-3-57
Page(s): 19 - 24
Authors: ERKUTAY TASDEMIRCI , ERTAN ALPTEKIN, MURAT HOSOZ

Abstract

In this study an experimental system was set up from the original components of an automotive air conditioning (AAC) system. After than internal heat exchanger (IHX) and reversing valve were installed to use as heat pump and improve performance of it. For each mode of operations, the system was tested at five different compressor speeds between 800 and 2800 rpm with intervals of 400 rpm. In the heat pump mode operations without IHX, the temperatures of the air streams entering the evaporator and condenser were maintained at Tevap,ai=0C Tcond,ai=0C, Tevap,ai=10C Tcond,ai=10C and Tevap,ai=15C Tcond,ai=15C. IHX was started up the temperatures of the air streams at the inlets of the evaporator and condenser were maintained at Tevap,ai=5C Tcond,ai=5C, Tevap,ai=10C Tcond,ai=10C and Tevap,ai=15C Tcond,ai=15C. Using experimental data, performance parameters such as conditioned air stream temperature, compressor power, compressor mechanical power and compressor discharge temperature were evaluated. In heat pump mode provided enough heating capacity and conditioned air stream temperatures even at low compressor speeds. Furthermore, the heating capacity increased but COPh decreased with rising compressor speed however compressor power decreased and COPc increased with using IHX.