Calcium chloride hexahydrate (CaCl2·6H2O) is an attractive candidate as a phase change material for supplemental cooling in air-cooled thermal power-plant since it has a low-phase transition temperature of 29.3 °C and a relatively large volumetric energy storage density of 289 MJ/m3. The volumetric energy storage density is approximately double the energy densities of comparable paraffins with similar melting points. However, calcium chloride hexahydrate often requires high degree of supercooling to initiate solidification and long-term thermal stability has impeded the adoption of calcium chloride hexahydrate in the latent heat thermal energy storage system. There are only a few literatures which report on long-term stability of pure calcium chloride hexahydrate accurately. In this paper, the effects of sodium chloride and strontium chloride in mitigating supercooling in calcium chloride hexahydrate over 1000 melt–freeze cycles and thermal stability at elevated temperatures were studied in large sample size. Since there is not much data available on calcium chloride hexahydrate with nucleating additives, the current data available do not provide an insight into the effects of thermal cycling on supercooling. Therefore, this study also aims to measure the reliability of calcium chloride hexahydrate and report it, in terms of variations in melting temperature, supercooling, energy storage density, and change in mass over 1000 melt–freeze cycles. The results have shown that strontium chloride as heterogenous nucleators reduces supercooling by 2.5 °C and survived up to 1000 melt–freeze cycles (i.e., 2.7 years).
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October 2019
Research-Article
Thermal Cycling of Calcium Chloride Hexahydrate With Strontium Chloride as a Phase Change Material for Latent Heat Thermal Energy Storage Applications in a Nondifferential Scanning Calorimeter Set-Up
Navin Kumar,
Navin Kumar
1
Mechanical Engineering Department,
3123 TAMU,
College Station, TX 77843
e-mail: navin.subram@gmail.com
Texas A&M University
,3123 TAMU,
College Station, TX 77843
e-mail: navin.subram@gmail.com
1Corresponding author.
Search for other works by this author on:
Debjyoti Banerjee
Debjyoti Banerjee
Mechanical Engineering Department,
3123 TAMU,
College Station, TX 77843
e-mail: dbanerjee@tamu.edu
Texas A&M University
,3123 TAMU,
College Station, TX 77843
e-mail: dbanerjee@tamu.edu
Search for other works by this author on:
Navin Kumar
Mechanical Engineering Department,
3123 TAMU,
College Station, TX 77843
e-mail: navin.subram@gmail.com
Texas A&M University
,3123 TAMU,
College Station, TX 77843
e-mail: navin.subram@gmail.com
Debjyoti Banerjee
Mechanical Engineering Department,
3123 TAMU,
College Station, TX 77843
e-mail: dbanerjee@tamu.edu
Texas A&M University
,3123 TAMU,
College Station, TX 77843
e-mail: dbanerjee@tamu.edu
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the Journal of Thermal Science and Engineering Applications. Manuscript received October 20, 2018; final manuscript received February 2, 2019; published online April 22, 2019. Assoc. Editor: Steve Q. Cai.
J. Thermal Sci. Eng. Appl. Oct 2019, 11(5): 051014 (7 pages)
Published Online: April 22, 2019
Article history
Received:
October 20, 2018
Revision Received:
February 2, 2019
Accepted:
February 4, 2019
Citation
Kumar, N., and Banerjee, D. (April 22, 2019). "Thermal Cycling of Calcium Chloride Hexahydrate With Strontium Chloride as a Phase Change Material for Latent Heat Thermal Energy Storage Applications in a Nondifferential Scanning Calorimeter Set-Up." ASME. J. Thermal Sci. Eng. Appl. October 2019; 11(5): 051014. https://doi.org/10.1115/1.4042859
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