Lubis, Daniel Christensen (2026) Analisis Coefficient of Performance Pada Penambahan Kipas Pendingin Kondensor AC Mobil Diesel Kapasitas 2400 Cc. Other thesis, Universitas Islam Riau.

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Abstract

This study aims to analyze the effect of adding an extra cooling fan to the condenser on the Coefficient of Performance (COP) of a diesel vehicle air conditioning (AC) system with a 2400 cc engine capacity. A common problem encountered in diesel vehicle AC systems is a decrease in cooling performance when the vehicle is in an idle condition, which causes an increase in cabin temperature due to suboptimal condenser operation. This research was conducted experimentally using a vehicle AC system with R-134a refrigerant. The tests were carried out under three conditions: normal operation, overload condition, and operation after the installation of an extra fan. The measured data included compressor suction and discharge pressures, refrigerant temperatures at several points in the cycle, electric current, and compressor operating voltage. The results show that the addition of an extra fan enhances heat rejection in the condenser and stabilizes the system’s operating pressure, thereby preventing compressor overload conditions. The average actual COP obtained with the extra fan was 2.84, while the ideal COP was 5.09, resulting in a system efficiency of 55.79%. Therefore, the addition of a cooling fan to the condenser is proven to improve the thermal stability of the cooling system and enhance the performance of the vehicle’s AC system when the engine is operating at idle conditions.

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