Fourth International Conference on Advances in Mechanical and Robotics Engineering - AMRE 2016
Author(s) : ERKUTAY TASDEMIRCI , ERTAN ALPTEKIN, MURAT HOSOZ
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=0°C – Tcond,ai=0°C, Tevap,ai=10°C –Tcond,ai=10°C and Tevap,ai=15°C – Tcond,ai=15°C. IHX was started up the temperatures of the air streams at the inlets of the evaporator and condenser were maintained at Tevap,ai=5°C – Tcond,ai=5°C, Tevap,ai=10°C –Tcond,ai=10°C and Tevap,ai=15°C – Tcond,ai=15°C. 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.