Experimental and numerical characterization of sub-zero phase change materials for cold thermal energy storage

Research output: Contribution to journalArticlepeer-review

Standard

Experimental and numerical characterization of sub-zero phase change materials for cold thermal energy storage. / Borri, Emiliano; Sze, Jia Yin; Tafone, Alessio; Romagnoli, Alessandro; Li, Yongliang; Comodi, Gabriele.

In: Applied Energy, Vol. 275, 115131, 01.10.2020.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Vancouver

Author

Borri, Emiliano ; Sze, Jia Yin ; Tafone, Alessio ; Romagnoli, Alessandro ; Li, Yongliang ; Comodi, Gabriele. / Experimental and numerical characterization of sub-zero phase change materials for cold thermal energy storage. In: Applied Energy. 2020 ; Vol. 275.

Bibtex

@article{62dcd1c16ac742468cff89c5515714dc,
title = "Experimental and numerical characterization of sub-zero phase change materials for cold thermal energy storage",
abstract = "Latent heat thermal energy storage systems are gaining increasing attention due to their high energy density and ability to discharge at near isothermal temperatures. A good understanding of the thermal behaviour of phase change materials (PCMs) used in these systems and therefore, a methodology for the characterisation of the phase change behaviour of storage media during charge and discharge phases is important for an optimised storage design. In this work, an experimental rig in a cylindrical shape container was designed to obtain the thermal profiles of different category of sub-zero PCMs. The experimental measurement of deionised water (ice) was first used to calibrate and validate a numerical 1-D model. Three types of sub-zero PCMs were further tested including aqueous sodium chloride, aqueous ethylene glycol and decane. The numerical results showed that aqueous alcohol had the best agreement with the experiments. In the case of paraffin and aqueous sodium chloride, a discrepancy between numerical and experimental results was found. In particular, during the melting phase, the discrepancy was due to the effect of natural convection while, during the solidification phase, it was due to the effect of supercooling. This highlights the importance of correct estimation of those effects for an accurate prediction. However, due to its simplicity, the 1-D model can be considered a valid method to approximate behavior of the different PCM and to compare the thermal profiles of different materials.",
keywords = "Cold storage, Experimental study, Latent heat, Numerical methods, Phase change material, Subzero",
author = "Emiliano Borri and Sze, {Jia Yin} and Alessio Tafone and Alessandro Romagnoli and Yongliang Li and Gabriele Comodi",
year = "2020",
month = oct,
day = "1",
doi = "10.1016/j.apenergy.2020.115131",
language = "English",
volume = "275",
journal = "Applied Energy",
issn = "0306-2619",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Experimental and numerical characterization of sub-zero phase change materials for cold thermal energy storage

AU - Borri, Emiliano

AU - Sze, Jia Yin

AU - Tafone, Alessio

AU - Romagnoli, Alessandro

AU - Li, Yongliang

AU - Comodi, Gabriele

PY - 2020/10/1

Y1 - 2020/10/1

N2 - Latent heat thermal energy storage systems are gaining increasing attention due to their high energy density and ability to discharge at near isothermal temperatures. A good understanding of the thermal behaviour of phase change materials (PCMs) used in these systems and therefore, a methodology for the characterisation of the phase change behaviour of storage media during charge and discharge phases is important for an optimised storage design. In this work, an experimental rig in a cylindrical shape container was designed to obtain the thermal profiles of different category of sub-zero PCMs. The experimental measurement of deionised water (ice) was first used to calibrate and validate a numerical 1-D model. Three types of sub-zero PCMs were further tested including aqueous sodium chloride, aqueous ethylene glycol and decane. The numerical results showed that aqueous alcohol had the best agreement with the experiments. In the case of paraffin and aqueous sodium chloride, a discrepancy between numerical and experimental results was found. In particular, during the melting phase, the discrepancy was due to the effect of natural convection while, during the solidification phase, it was due to the effect of supercooling. This highlights the importance of correct estimation of those effects for an accurate prediction. However, due to its simplicity, the 1-D model can be considered a valid method to approximate behavior of the different PCM and to compare the thermal profiles of different materials.

AB - Latent heat thermal energy storage systems are gaining increasing attention due to their high energy density and ability to discharge at near isothermal temperatures. A good understanding of the thermal behaviour of phase change materials (PCMs) used in these systems and therefore, a methodology for the characterisation of the phase change behaviour of storage media during charge and discharge phases is important for an optimised storage design. In this work, an experimental rig in a cylindrical shape container was designed to obtain the thermal profiles of different category of sub-zero PCMs. The experimental measurement of deionised water (ice) was first used to calibrate and validate a numerical 1-D model. Three types of sub-zero PCMs were further tested including aqueous sodium chloride, aqueous ethylene glycol and decane. The numerical results showed that aqueous alcohol had the best agreement with the experiments. In the case of paraffin and aqueous sodium chloride, a discrepancy between numerical and experimental results was found. In particular, during the melting phase, the discrepancy was due to the effect of natural convection while, during the solidification phase, it was due to the effect of supercooling. This highlights the importance of correct estimation of those effects for an accurate prediction. However, due to its simplicity, the 1-D model can be considered a valid method to approximate behavior of the different PCM and to compare the thermal profiles of different materials.

KW - Cold storage

KW - Experimental study

KW - Latent heat

KW - Numerical methods

KW - Phase change material

KW - Subzero

UR - http://www.scopus.com/inward/record.url?scp=85087214019&partnerID=8YFLogxK

U2 - 10.1016/j.apenergy.2020.115131

DO - 10.1016/j.apenergy.2020.115131

M3 - Article

AN - SCOPUS:85087214019

VL - 275

JO - Applied Energy

JF - Applied Energy

SN - 0306-2619

M1 - 115131

ER -