Research Information System
Çukurova Üniversitesi Mühendislik-Mimarlik Fakültesi Dergisi, vol.34, no.2, pp.171-180, 2019 (Other Refereed National Journals)
In this study, a minibus air conditioning (MAC) set using R134a was tested and evaluated in the Adana
High Vocational School, Çukurova University. The condensation pressure was gradually increased from
650 kPa to 770 kPa. The indoor and outdoor temperatures were kept constant at 20 oC and 22 oC,
respectively. The cooling capacity of the MAC is 6000 kcal/h at 35℃ ambient temperature. The MAC
consists of four main elements; a compressor, a condenser, an expansion valve and an evaporator. The
purpose of this study is to demonstrate how the irreversibility analysis is performed. For this aim,
experiments were carried out for different condensation pressures at constant ambient temperature in order
to determine the rates of the exergy transfer and the entropy generation within the all components and the
MAC system. In addition to this, the rational exergy efficiency of the all components and the whole system
were calculated. Increasing condensation pressure caused 8.3% increase in both the rate of entropy
generation and the irreversibility rate for the whole system. Besides, the rational exergy efficiency of the
whole system was approximately 24%