From waste to value: Utilising waste foundry sand in thermal energy storage as a matrix material in composites

Argyrios Anagnostopoulos; M. Elena Navarro; Shivangi Sharma; Abdalqader Ahmad; Yelaman Maksum; Yulong Ding

doi:10.1016/j.solener.2023.112294

From waste to value: Utilising waste foundry sand in thermal energy storage as a matrix material in composites

Argyrios Anagnostopoulos^*, M. Elena Navarro^*, Shivangi Sharma, Abdalqader Ahmad, Yelaman Maksum, Yulong Ding

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Waste foundry sand (WFS) is a by-product of the casting industry, which poses increasing economic and environmental issues due to the costs associated with landfill maintenance and stricter environmental regulations. This study proposes a novel solution for WFS as a material for thermal energy storage. The approach involves blending WFS with NaNO₃ and a proprietary additive, X, to fabricate a composite phase change material (CPCM). The CPCM is found to be structurally stable up to 400 °C, and an optimal composition with a mass ratio of NaNO₃:WFS:X = 0.6:0.3:0.1 is achieved. This composition yields an energy storage density of 628 ± 27 kJ/kg, and an average thermal conductivity of 1.38 W/mK over the temperature range of 25–400 °C. The CPCM also exhibits good mechanical strength and a low coefficient of thermal expansion compared to NaNO₃. Currently, only a small portion of WFS is recycled, most commonly in building applications. The CPCM presented in this study has the potential for medium-to-high temperature heat storage in waste heat recovery applications, offering a sustainable solution for upcycling WFS.

Original language	English
Article number	112294
Number of pages	9
Journal	Solar Energy
Volume	268
Early online date	28 Dec 2023
DOIs	https://doi.org/10.1016/j.solener.2023.112294
Publication status	Published - 15 Jan 2024

Bibliographical note

Funding Information:
The authors would like to acknowledge Transforming Foundation Industries Network + in the context of THERMCAST (EPSRC grant EP/V026402/1) as well as the European Commision under Grant agreement ID: 101068507.

Keywords

Composite
Foundry sand
Latent heat storage
Phase change
Upcycling
Waste heat recovery

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Materials Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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AnagnostopoulosA2023wasteFinal published version, 5.08 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

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title = "From waste to value: Utilising waste foundry sand in thermal energy storage as a matrix material in composites",

abstract = "Waste foundry sand (WFS) is a by-product of the casting industry, which poses increasing economic and environmental issues due to the costs associated with landfill maintenance and stricter environmental regulations. This study proposes a novel solution for WFS as a material for thermal energy storage. The approach involves blending WFS with NaNO3 and a proprietary additive, X, to fabricate a composite phase change material (CPCM). The CPCM is found to be structurally stable up to 400 °C, and an optimal composition with a mass ratio of NaNO3:WFS:X = 0.6:0.3:0.1 is achieved. This composition yields an energy storage density of 628 ± 27 kJ/kg, and an average thermal conductivity of 1.38 W/mK over the temperature range of 25–400 °C. The CPCM also exhibits good mechanical strength and a low coefficient of thermal expansion compared to NaNO3. Currently, only a small portion of WFS is recycled, most commonly in building applications. The CPCM presented in this study has the potential for medium-to-high temperature heat storage in waste heat recovery applications, offering a sustainable solution for upcycling WFS.",

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note = "Funding Information: The authors would like to acknowledge Transforming Foundation Industries Network + in the context of THERMCAST (EPSRC grant EP/V026402/1) as well as the European Commision under Grant agreement ID: 101068507. ",

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AU - Anagnostopoulos, Argyrios

AU - Elena Navarro, M.

AU - Sharma, Shivangi

AU - Ahmad, Abdalqader

AU - Maksum, Yelaman

AU - Ding, Yulong

N1 - Funding Information: The authors would like to acknowledge Transforming Foundation Industries Network + in the context of THERMCAST (EPSRC grant EP/V026402/1) as well as the European Commision under Grant agreement ID: 101068507.

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N2 - Waste foundry sand (WFS) is a by-product of the casting industry, which poses increasing economic and environmental issues due to the costs associated with landfill maintenance and stricter environmental regulations. This study proposes a novel solution for WFS as a material for thermal energy storage. The approach involves blending WFS with NaNO3 and a proprietary additive, X, to fabricate a composite phase change material (CPCM). The CPCM is found to be structurally stable up to 400 °C, and an optimal composition with a mass ratio of NaNO3:WFS:X = 0.6:0.3:0.1 is achieved. This composition yields an energy storage density of 628 ± 27 kJ/kg, and an average thermal conductivity of 1.38 W/mK over the temperature range of 25–400 °C. The CPCM also exhibits good mechanical strength and a low coefficient of thermal expansion compared to NaNO3. Currently, only a small portion of WFS is recycled, most commonly in building applications. The CPCM presented in this study has the potential for medium-to-high temperature heat storage in waste heat recovery applications, offering a sustainable solution for upcycling WFS.

AB - Waste foundry sand (WFS) is a by-product of the casting industry, which poses increasing economic and environmental issues due to the costs associated with landfill maintenance and stricter environmental regulations. This study proposes a novel solution for WFS as a material for thermal energy storage. The approach involves blending WFS with NaNO3 and a proprietary additive, X, to fabricate a composite phase change material (CPCM). The CPCM is found to be structurally stable up to 400 °C, and an optimal composition with a mass ratio of NaNO3:WFS:X = 0.6:0.3:0.1 is achieved. This composition yields an energy storage density of 628 ± 27 kJ/kg, and an average thermal conductivity of 1.38 W/mK over the temperature range of 25–400 °C. The CPCM also exhibits good mechanical strength and a low coefficient of thermal expansion compared to NaNO3. Currently, only a small portion of WFS is recycled, most commonly in building applications. The CPCM presented in this study has the potential for medium-to-high temperature heat storage in waste heat recovery applications, offering a sustainable solution for upcycling WFS.

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From waste to value: Utilising waste foundry sand in thermal energy storage as a matrix material in composites

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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