Abstract
Cold Thermal Energy Storage (CTES) is a technology with a high potential for different cooling applications. Many previous works have investigated energy efficiency of different cold units by applying CTES systems using phase change materials (PCMs). Phase change materials (PCMs) are generally regarded as a promising material for storing thermal energy. This work presents an experimental study on phase change materials for cold storage application. The experimental process of phase-change materials is based on the following chemicals: water, propylene glycol (C<sub>3</sub>H<sub>8</sub>O<sub>2</sub>), glycerin (C<sub>3</sub>H<sub>8</sub>O<sub>3</sub>), parrafin oil (white oil LP-70), and sodium polyacrylate (C<sub>3</sub>H<sub>3</sub>NaO<sub>2</sub>)<sub>n</sub>. The temperature changes over time as ice charging and discharging the phase-change materials are investigated. At the same time, the work try to analyze the physical and chemical properties of the aforementioned phase-change materials. The results indicate that the discharging process of paraffin and glycol is rapid. As for water and sodium polyacrylate, the discharging time is slower than that of paraffin and glycol. And finally, for glycerin, the loading time is slowest compared to other chemicals, the discharging time is also slowest compared to the other four chemicals. This indicates that the latent heat of glycerin has high value, long melting time and deep ice storage temperature. This is a suitable material for use in cold storage systems as a phase change material.
Highlights
Phase change materials (PCMs) are generally regarded as a promising material for storing thermal energy
After performing the ice creation process in the above experiment, bottles containing phase-change materials: water, glycol, glycerin, paraffin, and Journal of Energy and Natural Resources 2020; 9(2): 51-55 sodium polyacrylate are stored to low temperatures, these bottles are dipped in water box covered with insulation
The initial temperature of the phase-change materials was 30°C, after the first 50 minutes of loading, the temperatures of paraffin, glycol and glycerin were reduced to approximately 1.1°C, 2.4°C and 4.9°C respectively, while the water temperature was 9.9°C and temperatures of sodium polyacrylate about 16.9°C
Summary
Phase change materials (PCMs) are generally regarded as a promising material for storing thermal energy. They have many advantages of high-energy storage density and the isothermal nature of the storage process. Phase change materials (PCMs) have been widely used in latent heat thermal-storage systems for heat pumps, solar energy storage, and cooling storage. The latent heat during phase change of NaCl–H2O binary mixture was determined in various concentrations observing two different endothermic peaks, one due to a eutectic melting near -22°C, and the other for ice [6]. The thermal properties of tetradecane (melting point of 5.8°C), hexadecane (melting point of 18.1°C), and pentadecane (melting point of 9.9°C) were discussed, and the results showed that these materials are promising PCM candidates for some cold storage applications [8]. The results showed the apparent heat of solution of ethylene glycol with initial concentrations ranging between 9% and
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
