Improvement on Heat Release Performance of Direct-contact Heat Exchanger Using Phase Change Material for Recovery of Low Temperature Exhaust Heat

Nomura, Takahiro; Tsubota, Masakatsu; Okinaka, Noriyuki; Akiyama, Tomohiro

Improvement on Heat Release Performance of Direct-contact Heat Exchanger Using Phase Change Material for Recovery of Low Temperature Exhaust Heat

Nomura, Takahiro; Tsubota, Masakatsu; Okinaka, Noriyuki et al.

ISIJ International, 2015, 55(2), 441-447

Permalink : https://hdl.handle.net/2115/77489

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/77489
タイトル	Improvement on Heat Release Performance of Direct-contact Heat Exchanger Using Phase Change Material for Recovery of Low Temperature Exhaust Heat
著者	Nomura, Takahiro ; Tsubota, Masakatsu ; Okinaka, Noriyuki ; Akiyama, Tomohiro
e-Rad_Researcher 50714523 著者名 Nomura, Takahiro
著者名 Tsubota, Masakatsu
e-Rad_Researcher 20250483 著者名 Okinaka, Noriyuki
e-Rad_Researcher 50175808 著者名 Akiyama, Tomohiro
言語	英語
キーワード	thermal energy storage
	phase change material
	latent heat storage
	heat recovery
	exhaust heat
発行日	2015-02-15
出版者	Iron and Steel Institute of Japan
出版者	日本鉄鋼協会
収録物名	ISIJ International
巻(号)	55(2)
ページ	441-447
抄録	Latent heat storage using a phase change material (PCM) is a promising method for utilizing the exhaust heat from steelworks. The purpose of this study was to improve the heat release performance of a direct-contact heat exchanger using a PCM and heat transfer oil (HTO). Erythritol (with a melting point of 391 K), which is a kind of sugar alcohol, was selected as a PCM. A vertical stainless steel cylinder with an inner diameter of 200 mm and height of 1400 mm was used as the heat storage unit (HSU). A ring-shaped injector with 18 holes positioned vertically downward was placed at the bottom of the HSU. Each hole in this injector had a diameter of 2.5 mm. We investigated the effects of the height of the PCM in the HSU, the HTO flow rate, and an increase in the number of injection-nozzle holes on the temperature effectiveness and heat exchange rate as indices of the heat release performances. As results, we found that an increase in the number of nozzle holes accelerated the uniform distribution of the HTO in the liquid PCM, prevented the HTO drift flow and adverse solidification of the PCM, and improved the heat release performance under the condition of a high HTO flow rate.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	著作権は日本鉄鋼協会にある
PISSN	0915-1559
EISSN	1347-5460
NCID	AA10680712
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.2355/isijinternational.55.441