ANALISIS FENOMENA PEMBEKUAN EVAPORATOR DAN KOMPRESOR PADA SISTEM AC SENTRAL KAPAL DENGAN KOMPRESOR SEMIHERMETIK CARLYLE 06EA599 DAN REFRIGERAN R-407

Abstract

Abstract

 Centralized air-conditioning systems on ships often experience severe frosting on the evaporator and suction line, which reduces cooling performance and poses risks to the compressor. This study aims to analyze the root causes of frosting in a marine AC system using a Carlyle 06EA599 semi-hermetic compressor and R-407C refrigerant, and to provide technical recommendations to improve system reliability. The applied case-study method was used through direct inspection, pressure–temperature measurements, superheat/subcooling evaluation, and component assessment based on the Carlyle Service Guide. The results show that low evaporating pressure (3.2 bar), near-zero superheat, liquid floodback, and TXV hunting were the dominant causes of frosting. Refrigerant overcharge and high engine-room temperature further aggravated system imbalance. In conclusion, adjusting TXV superheat, reducing refrigerant charge, and verifying airflow were effective in eliminating flooding and stabilizing system performance.