Heat transfer and heat storage characteristics of calcium hydroxide/oxide based on shell-tube thermochemical energy storage device
Wei Wang,
Yong Shuai,
Jiangyu Yang,
Bachirou Guene Lougou and
Yudong Huang
Renewable Energy, 2023, vol. 218, issue C
Abstract:
Understanding the mechanisms and characteristics of heat and mass transfer is crucial for optimizing the design and operating parameters of Ca(OH)2/CaO fixed bed reactors, thereby improving energy conversion efficiency and storage performance. In this study, a comprehensive physicochemical model of shell-tube thermochemical energy storage (TCES) indirect reactor is developed, considering chemical reaction, heat and mass transfer, and turbulent fluid flow. The influences of different parameters such as inlet temperature and flow rate of the heat transfer fluid (HTF) and the porosity of the reaction bed are studied to assess their impact on reaction time, heat transfer power, heat transfer efficiency, and TES efficiency in the reactor. The result indicates that the inlet temperature of the HTF and the porosity of the reaction bed significantly impact the TCES efficiency and heat transfer efficiency of the reactor. Increasing the temperature of the HTF can enhance the reaction kinetics, a higher inlet temperature corresponds to a larger peak molar flow rate of the steam outlet. When the reactor porosity decreases from 0.80 to 0.70 and 0.70 to 0.60, the reaction time increases to 69.70% and 98.66%, respectively. However, increasing the flow velocity of the HTF does not have a significant effect on shortening the reaction time. It is observed that the TES efficiency of the shell-tube indirect reactor is relatively low, as a significant portion of the input heat is lost through the HTF and steam flowing out. Compared with the heat exchange energy, the heat taken away by steam is about 60%. These research findings are essential for improving the design and achieving more efficient, stable, and sustainable TCES systems.
Keywords: Thermochemical energy storage; Calcium hydroxide/oxide; Dehydration; Heat and mass transfer; Numerical simulation (search for similar items in EconPapers)
Date: 2023
References: Add references at CitEc
Citations: View citations in EconPapers (1)
Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S096014812301279X
Full text for ScienceDirect subscribers only
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
HTML/Text
Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:218:y:2023:i:c:s096014812301279x
DOI: 10.1016/j.renene.2023.119364
Access Statistics for this article
Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides
More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu (repec@elsevier.com).