Direct current compressor for vehicle air conditioning system in non-electric vehicles

Vehicle air-conditioning (AC) system is the highest auxiliary load in the non-electric vehicle. Belt-driven compressor adds a small speed-dependent parasitic load even when not in use. This study investigates the possibility of direct current compressor to retrofit into an existing vehicle AC system in the non-electric vehicle. Electric-powered present offer potential of low energy consumption than their mechanical counterparts: electrically operated compressor can reduce engine idle time and offering near zero parasitic loads when not in use. The experiment is done using a compact hatchback car on a roller dynamometer to emulate the level road condition. An experimental period of one hour is made at temperature setting of 25°C at 30 km/h vehicle speed. The results indicate that the direct current compressor offers fuel saving of 8.26% at 30 km/h vehicle speed with improves cabin temperature inside the vehicle for better thermal comfort.