Article
Rancang Bangun Thermal Energy Storage menggunakan LDPE Berbasis Asam
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin, Vol. 11 No. 3 (2026), hlm. 155–165
Abstrak
The increasing demand for energy across various sectors has encouraged the development of thermal energy storage technologies to improve the efficiency of heat utilization. One technology that has been widely developed is Thermal Energy Storage (TES) based on Phase Change Materials (PCM). Asam palmitat is an organic PCM with high latent heat and good thermal stability, while Low Density Polyethylene (LDPE) is used as a supporting material to maintain Phase Change Materials(PCM) stability during the phase change process. This study aimed to design and construct a TES device based on asam palmitat and LDPE and to evaluate its performance through charging and discharging processes. The study was conducted experimentally through the stages of system design, manufacturing, charging and discharging tests, temperature measurement using type K thermocouples, and thermal energy analysis. The results showed that the temperature increased from 42.5°C to 122°C at point T1 and from 40.5°C to 116°C at point T2 during the charging process. Thermal energy analysis showed that the system stored a total energy of 33.30 kJ, consisting of 12.87 kJ of solid-phase sensible heat, 16.69 kJ of latent heat, and 3.80 kJ of liquid-phase sensible heat. These results indicate that the combination of asam palmitat and LDPE has potential as a thermal energy storage medium in TES systems.