Sistem pendingin coolerbox merupakan sistem pendingin yang memanfaatkan efek peltier dari modul termoelektrik sebagai alternatif dari sistem pendingin konvensional berbasis kompresor dan refrigeran penelitian ini bertujuan untuk menganalisis performa alat uji mesin pendingin berbasis termoelektrik yang menggunakan box berbahan plastik. metode penelitian yang digunakan adalah pengujian eksperimentas dimana variabelnya adalah variasi beban air mineral dan durasi pendinginan selama 60 menit. parameter yang diukur meliputi temperatur udara dalam box, temperatur beban, arus, dan tegangan, kemudian digunakan untuk menghitung nilai coefficient of performance. hasil penelitian menunjukkan bahwa coefficient of performance terendah diperoleh pada beban 500 ml dengan nilai 0,036 dan nilai tertinggi diperoleh pada beban 1000 ml dengan nilai 0,067. coefficient of performance cenderung menurun seiring lamanya durasi pendinginan dan peningkatan beban di atas kapasitas optimal. kapasitas optimal sistem pendingin tercapai pada beban 1000 ml, sementara efisiensi sistem masih tergolong rendah jika dibandingkan dengan sistem pendingin konvensional. kata kunci: coolerbox, box plastik, performa,termoelektrik

The cooler box cooling system is a cooling system that utilizes the peltier effect of thermoelectric modules as an alternative to conventional compressor and refrigerant-based cooling systems. this study aims to analyze the performance of thermoelectric-based cooling machine test equipment using a plastic box. the research employed an experimental method, with variables including variations in mineral water load and a cooling duration of 60 minutes. the measured parameters included air temperature inside the box, load temperature, current, and voltage, which were then used to calculate the coefficient of performance (cop). the results showed that the lowest cop was obtained at 500 ml load, with a value of 0.036, while the highest one was obtained at 1000 ml load, with a value of 0.067. the cop tended to decrease as the duration of cooling and load increased beyond the optimal capacity. the optimal capacity of the cooling system was reached at 1000 ml load, while the efficiency of the system remained relatively low compared to conventional cooling systems. keywords: cooler box, plastic box, performance, thermoelectricity