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

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ISIJ Int. 55(2)_ 441-447 (2015).pdf5.55 MBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/77489

Title: Improvement on Heat Release Performance of Direct-contact Heat Exchanger Using Phase Change Material for Recovery of Low Temperature Exhaust Heat
Authors: Nomura, Takahiro Browse this author →KAKEN DB
Tsubota, Masakatsu Browse this author
Okinaka, Noriyuki Browse this author →KAKEN DB
Akiyama, Tomohiro Browse this author →KAKEN DB
Keywords: thermal energy storage
phase change material
latent heat storage
heat recovery
exhaust heat
Issue Date: 15-Feb-2015
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 55
Issue: 2
Start Page: 441
End Page: 447
Publisher DOI: 10.2355/isijinternational.55.441
Abstract: 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.
Rights: 著作権は日本鉄鋼協会にある
Type: article
URI: http://hdl.handle.net/2115/77489
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 能村 貴宏

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