Investigation of temperature variation on thermal ice storage by using propylene-glycol and 100% water

Raja Adnan, Raja Muhammad Asyraf (2022) Investigation of temperature variation on thermal ice storage by using propylene-glycol and 100% water. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Thermal energy storage systems (TES) can store heat or cold for later use, under different variables such as temperature, location or power. Sensitive heat, latent heat and thermochemical systems are classified into three different categories of TES systems. For each TES system and identifies the requirements for each technology and application. TES systems may successfully meet energy redistribution requirements for cooling or heating. By using the stored thermal energy from TES units, peak load demand may be moved to off-peak hours. As a result, compare the variation of temperature on compressor, evaporator and water temperature in between 100% water and propylene-glycol mixture water. This research is focus to thermal ice energy storage that using 100% water for system or propylene glycol mixture water in system to determine the cop and range temperature for both medium. System will be running for 16 hours in other to collect the data. In this project, refrigeration R134a will use as main refrigeration in system. The lowest temperature in water achieved is 2.3ºC. For this project, the COP for 100% water and propylene-glycol is different which is system use propylene-glycol mixture water has better result of COP with 3.61, meanwhile COP for 100% water is 3.38 lower than propylene- glycol.

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