Low temperature phase change materials for thermal energy storage: Current status and computational perspectives

2022 ◽  
Vol 50 ◽  
pp. 101808
Author(s):  
Gul Hameed ◽  
Muhammad Ahsan Ghafoor ◽  
Muhammad Yousaf ◽  
Muhammad Imran ◽  
Muhammad Zaman ◽  
...  
Keyword(s):  
Energy Storage ◽  
Low Temperature ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Current Status ◽  
Temperature Phase ◽  
Low Temperature Phase

scholarly journals Investigation on compatibility and thermal reliability of phase change materials for low-temperature thermal energy storage

2020 ◽  
Vol 9 (4) ◽  
Author(s):  
Jaya Krishna Devanuri ◽  
Uma Maheswararao Gaddala ◽  
Vikas Kumar
Keyword(s):  
Energy Storage ◽  
Low Temperature ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Sodium Acetate ◽  
Phase Change Materials ◽  
Freezing Point ◽  
Thermal Cycles ◽  
Thermal Reliability

AbstractTwo of the important aspects for the successful utilization of phase change materials (PCMs) for thermal energy storage systems are compatibility with container materials and stability. Therefore, the present study is focused on testing the corrosion resistance and surface characteristics of metals in contact with PCMs and thermal behavior of PCMs with heating/cooling cycles. The PCM selection is made by targeting low temperature (<100 °C) heat storage applications. The PCMs considered are paraffin wax, sodium acetate tri-hydrate, lauric acid, myristic acid, palmitic acid, and stearic acid. The metal specimens tested are aluminum, copper, and stainless steel because of their wide usage in thermal equipment. The tests are performed by the method of immersion corrosion test, and ASTM G1 standards are followed. The experiments are carried out at 80 °C and room temperature (30 °C) for the duration of 10, 30, and 60 days. Pertaining to thermal stability 1500 melting/freezing cycles are performed. Investigation has been carried out in terms of corrosion rate, SEM analysis of metal specimens, appearance of PCMs, and variation of thermophysical properties at 0th, 1000th, and 1500th thermal cycles. The most affected area of corrosion, including the dimension of pits, is presented, and comparison is made. Based on the corrosion experiments, recommendations are made for the metal–PCM pairs. Pure sodium acetate trihydrate is observed to suffer from phase segregation and supercooling. After 1500 thermal cycles, the variation in melting and freezing point temperatures for rest of the five PCMs are in the range of − 1.63 to 1.57 °C and − 4.01 to 2.66 °C. Whereas, reduction in latent heat of melting and freezing are in the range of 17.6–28.95% and 15.2–26.78%.

scholarly journals The Use of Capsuled Paraffin Wax in Low-Temperature Thermal Energy Storage Applications: An Experimental and Numerical Investigation

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 538
Author(s):  
Agnieszka Ochman ◽  
Wei-Qin Chen ◽  
Przemysław Błasiak ◽  
Michał Pomorski ◽  
Sławomir Pietrowicz
Keyword(s):  
Phase Transitions ◽  
Energy Storage ◽  
Low Temperature ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Operating Conditions ◽  
Paraffin Wax ◽  
Temperature Phase ◽  
Maximum Heat

The article deals with the experimental and numerical thermal-flow behaviours of a low-temperature Phase Change Material (PCM) used in Thermal Energy Storage (TES) industrial applications. The investigated PCM is a composition that consists of a mixture of paraffin wax capsuled in a melamine-formaldehyde membrane and water, for which a phase change process occurs within the temperature range of 4 °C to 6 °C and the maximum heat storage capacity is equal to 72 kJ/kg. To test the TES capabilities of the PCM for operating conditions close to real ones, a series of experimental tests were performed on cylindrical modules with fixed heights of 250 mm and different outer diameters of 15, 22, and 28 mm, respectively. The module was tested in a specially designed wind tunnel where the Reynolds numbers of between 15,250 to 52,750 were achieved. In addition, a mathematical model of the analysed processes, based on the enthalpy porosity method, was proposed and validated. The temperature changes during the phase transitions that were obtained from the numerical analyses in comparison with the experimental results have not exceeded 20% of the relative error for the phase change region and no more than 10% for the rest. Additionally, the PCM was examined while using a Scanning Electron Microscope (SEM), which indicated no changes in the internal structure during phase transitions and a homogeneous structure, regardless of the tested temperature ranges.

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