Bima Putra, A. and Faiz Husnayain 2026. Performance Evaluation and Energy-Saving Prioritization of Thermal Oil Heater in Plastic Manufacturing Plant. International Journal of Electrical, Energy and Power System Engineering. 9, 2 (Jun. 2026), 79-93. DOI:https://doi.org/10.31258/ijeepse.9.2.79-93.