Performance Analysis of a Water Cooled Chiller After Overhaul at the Dioctyl Phthalate Plant of PT XYZ
Analisa Unjuk Kerja Mesin Chiller Water Cooled Pasca Overhaul Pada Plant Dioctyl Phthalate PT XYZ
DOI:
https://doi.org/10.21070/ups.11943Keywords:
Water Cooled Chiller, Overhaul, Mechanical Cleaning, Chemical Cleaning, Coefficient of PerformanceAbstract
A water-cooled chiller is an essential component in the Dioctyl Phthalate (DOP) production process at PT XYZ, providing cooling water for the system. Over time, condenser fouling can reduce chiller performance and efficiency. This study evaluated chiller performance after overhaul through mechanical and chemical cleaning using the Coefficient of Performance (COP) as the main indicator. Data were collected at cooling loads of 45%, 55%, and 60% by measuring temperature, pressure, and compressor motor current. Refrigerant enthalpy was determined using the R-134a pressure-enthalpy (P-h) diagram to calculate COP. The results showed that both cleaning methods reduced condenser pressure, condensing temperature, and compressor motor current. COP increased from 4.3–3.9 before mechanical cleaning to 6.0–5.6 after mechanical cleaning and 6.1–5.8 after chemical cleaning. These results indicate that the overhaul effectively improved chiller efficiency and performance.
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