scholarly journals The Role of Soya Oil Ester in Water-Based PCM for Low Temperature Cool Energy Storage

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
I. M. Rasta ◽  
I. N. G. Wardana ◽  
N. Hamidi ◽  
M. N. Sasongko
Keyword(s):  
Energy Storage ◽  
Low Temperature ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Freezing Point ◽  
Nucleating Agent ◽  
Supercooling Degree ◽  
Water Based ◽  
Energy Storage Properties ◽  
Soya Oil

This study focuses on the preparation of the water-based phase change material (PCM) with very small soya oil solution for low temperature latent heat thermal energy storage (LHTES). Soya oil ester is soluble very well in water and acts as nucleating agent for a novel solid-liquid PCM candidate that is suitable for low temperature cool storage in the range between −9°C and −6°C. Thermal energy storage properties of the water with very small soya oil ester solution were measured by T-history method. The experimental results show that very small amount of soya oil ester in water can lower the freezing point and trigger ice nucleation for elimination of the supercooling degree. The phase transition temperatures of the water-based PCMs with soya oil as nucleate agent were lower than those of individual water. The thermal properties make it potential PCM for LHTES systems used in low temperature cool energy storage applications.

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%.

Energy storage analysis of CO2 in MOF-74 and UIO-66 nanoparticles: A molecular simulation study

2019 ◽  
Vol 33 (18) ◽  
pp. 1950196 ◽  
Author(s):  
Qiang Wang ◽  
Shengli Tang
Keyword(s):  
Energy Storage ◽  
Adsorption Capacity ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Working Fluid ◽  
Thermodynamic Cycles ◽  
Different Temperatures ◽  
Energy Storage Properties ◽  
Metal Organic ◽  
Adsorption Of Co

Adding porous nanoparticles into fluid can modify the energy storage properties of working fluid in the thermodynamic cycles. The adsorption capacity and thermal energy storage of CO2 in MOF-74 and UIO-66 at different temperatures and pressures are investigated in this paper via molecular simulations. The results denote that the adsorption of CO2 in the two studied metal organic frameworks (MOFs) differ from each other due to the different structures. The adsorption capacity of CO2 in MOF-74 is larger than that in UIO-66. However, the desorption heat of CO2 in MOF-74 is lower than that in UIO-66. Also, UIO-66 impacts more than MOF-74 on the thermal energy storage property of CO2.

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