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Performance Analysis of Composite Sorbents in Thermal Energy Storage System

[+] Author Affiliations
Dongsheng Zhu, Xuebo Li, Huijun Wu, Nan Wang

South China University of Technology, Guangzhou, China

Paper No. MNC2007-21588, pp. 941-947; 7 pages
doi:10.1115/MNC2007-21588
From:
  • 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems
  • First International Conference on Integration and Commercialization of Micro and Nanosystems, Parts A and B
  • Sanya, Hainan, China, January 10–13, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4265-7 | eISBN: 0-7918-3794-7
  • Copyright © 2007 by ASME

abstract

Composite adsorbents, prepared by impregnating hygroscopic salt into silica gel pores are considered as promising storage materials in space heating for their high specific storage density and low regenerating temperature. In this paper, a numerical model of the adsorber heat exchanger was developed. Four kinds of composite adsorbents were tested under different conditions. The experiments were conducted to investigate the effect of their nature, the regenerating temperature, the air flow rate and number of transfer unit on the thermal storage performances. The results reveal that thermal storage performances increases significantly with CaCl2 concentration ranged from 10% to 40%. COP declines with the regenerating temperature and air flow rate, ranged from 80°C to 90°C and 4 m3 /min to 6 m3 /min respectively, while NTU is another case. The optimization of thermal performance of TES can be achieved by compromising between the above factors.

Copyright © 2007 by ASME

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