Latent Thermal Storage Using Sodium Hydroxide-Based Molten Salts: —Demonstration of 30kWh-scale storage units—

Yoshiyuki Abe; Yoshio Takahashi; Kotaro Tanaka; Katsuhiko Kanari; Ryuji Sakamoto; Masayuki Kamimoto; Takeo Ozawa

doi:10.1252/kakoronbunshu.18.37

Latent Thermal Storage Using Sodium Hydroxide-Based Molten Salts: —Demonstration of 30kWh-scale storage units—

Yoshiyuki Abe, Yoshio Takahashi, Kotaro Tanaka, Katsuhiko Kanari, Ryuji Sakamoto, Masayuki Kamimoto, Takeo Ozawa

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

Abstract

The present paper describes experimental results of the operation of 30kWh-scale molten salt latent thermal storage units using a eutectic of sodium hydroxide and sodium nitrate which is suitable for thermal storage around 250°C. The main problems of molten salt as a latent thermal storage material are its large volume change on phase change and its feasibility for use with structural materials. Using mild steel, two different U-tube storage units were built for testing heat transfer performance, structural feasibility and compatibility with the molten salt. From thorough and comprehensive material analyses after 1,000 melting-freezing (charge-discharge) cycle tests, it was concluded that the present storage unit structure (horizontal U-tube and multiple-path type) and material selection were fairly feasible for a latent thermal storage unit with this particular molten salt.

Original language	English
Pages (from-to)	37-43
Number of pages	7
Journal	KAGAKU KOGAKU RONBUNSHU
Volume	18
Issue number	1
DOIs	https://doi.org/10.1252/kakoronbunshu.18.37
Publication status	Published - 1992
Externally published	Yes

Keywords

Corrosion
Energy
High Temperature
Latent Heat
Molten Salt
Sodium Hydroxide
Thermal Storage

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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title = "Latent Thermal Storage Using Sodium Hydroxide-Based Molten Salts: —Demonstration of 30kWh-scale storage units—",

abstract = "The present paper describes experimental results of the operation of 30kWh-scale molten salt latent thermal storage units using a eutectic of sodium hydroxide and sodium nitrate which is suitable for thermal storage around 250°C. The main problems of molten salt as a latent thermal storage material are its large volume change on phase change and its feasibility for use with structural materials. Using mild steel, two different U-tube storage units were built for testing heat transfer performance, structural feasibility and compatibility with the molten salt. From thorough and comprehensive material analyses after 1,000 melting-freezing (charge-discharge) cycle tests, it was concluded that the present storage unit structure (horizontal U-tube and multiple-path type) and material selection were fairly feasible for a latent thermal storage unit with this particular molten salt.",

keywords = "Corrosion, Energy, High Temperature, Latent Heat, Molten Salt, Sodium Hydroxide, Thermal Storage",

author = "Yoshiyuki Abe and Yoshio Takahashi and Kotaro Tanaka and Katsuhiko Kanari and Ryuji Sakamoto and Masayuki Kamimoto and Takeo Ozawa",

year = "1992",

doi = "10.1252/kakoronbunshu.18.37",

language = "English",

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AU - Abe, Yoshiyuki

AU - Takahashi, Yoshio

AU - Tanaka, Kotaro

AU - Kanari, Katsuhiko

AU - Sakamoto, Ryuji

AU - Kamimoto, Masayuki

AU - Ozawa, Takeo

PY - 1992

Y1 - 1992

N2 - The present paper describes experimental results of the operation of 30kWh-scale molten salt latent thermal storage units using a eutectic of sodium hydroxide and sodium nitrate which is suitable for thermal storage around 250°C. The main problems of molten salt as a latent thermal storage material are its large volume change on phase change and its feasibility for use with structural materials. Using mild steel, two different U-tube storage units were built for testing heat transfer performance, structural feasibility and compatibility with the molten salt. From thorough and comprehensive material analyses after 1,000 melting-freezing (charge-discharge) cycle tests, it was concluded that the present storage unit structure (horizontal U-tube and multiple-path type) and material selection were fairly feasible for a latent thermal storage unit with this particular molten salt.

AB - The present paper describes experimental results of the operation of 30kWh-scale molten salt latent thermal storage units using a eutectic of sodium hydroxide and sodium nitrate which is suitable for thermal storage around 250°C. The main problems of molten salt as a latent thermal storage material are its large volume change on phase change and its feasibility for use with structural materials. Using mild steel, two different U-tube storage units were built for testing heat transfer performance, structural feasibility and compatibility with the molten salt. From thorough and comprehensive material analyses after 1,000 melting-freezing (charge-discharge) cycle tests, it was concluded that the present storage unit structure (horizontal U-tube and multiple-path type) and material selection were fairly feasible for a latent thermal storage unit with this particular molten salt.

KW - Corrosion

KW - Energy

KW - High Temperature

KW - Latent Heat

KW - Molten Salt

KW - Sodium Hydroxide

KW - Thermal Storage

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Latent Thermal Storage Using Sodium Hydroxide-Based Molten Salts: —Demonstration of 30kWh-scale storage units—

Abstract

Keywords

ASJC Scopus subject areas

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