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A combined experimental and simulation study on charging process of Erythritol-HTO direct-blending based energy storage system
School of Engineering, Sun Yat-sen University, Guangzhou, China.
Academy of Building Energy Efficiency of Guangzhou University, Guangzhou, China.
Inner Mongolia University of Science and Technology, Baotou, China.
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0003-0300-0762
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2014 (English)In: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 83, 306-313 p.Article in journal (Refereed) Published
Abstract [en]

Thermal energy storage (TES) system is essential to recover and use intermittent heat, such as industrial waste/excess heat or solar energy. In this paper, a direct-contact erythritol/heat transfer oil (HTO) energy storage system has been studied experimentally, consisting of a thermal energy storage unit, electrical heaters, heat exchanger and water cycle. In the system, erythritol has been used as an energy storage media (melting point = 118 °C, heat enthalpy = 330 kJ/kg), and HTO is used as a heat transfer material. Moreover, simulation has been conducted to understand heat transfer enhancement mechanisms of direct-contact heat storage. It is noticed that, at the beginning of heat storage, heat transfer oil has a small flow rate due to the block of solid part. PCM in the middle area of the storage unit melts faster than other parts due to the greater heat transfer on the liquid-solid interface of the both sides, and erythritol attached on the storage unit wall melts slowly since small heat conductivity plays a key role for heat transfer. It is also found that increasing the flow rate of HTO can significantly decrease the melting time by increasing fluid turbulent degree. 

Place, publisher, year, edition, pages
2014. Vol. 83, 306-313 p.
Keyword [en]
Direct-contact, Heat recovery, Phase change, Thermal energy storage system
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:mdh:diva-24976DOI: 10.1016/j.enconman.2014.03.054ISI: 000336698600032Scopus ID: 2-s2.0-84899093839OAI: oai:DiVA.org:mdh-24976DiVA: diva2:716444
Available from: 2014-05-09 Created: 2014-05-09 Last updated: 2015-03-25Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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Language
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