Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (8): 72-76,108.doi: 10.3969/j.issn.1000-565X.2011.08.013

• Chemistry,Chemical & Energy Engineering • Previous Articles     Next Articles

Investigation into Model and Thermal Performance of Single Thermal Storage Tank with High-Temperature Molten Salt

Yang Xiao-ping1,2  Yang Xiao-xi2  Ding Jing3  Yang Min-lin2  Jiang Run-hua2   

  1. 1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education,South China University of Technology,Guangzhou 510640,Guangdong,China;2. Guangdong Provincial Key Laboratory of Distributed Energy Systems,Dongguan University of Technology,Dongguan 523808,Guangdong,China;3. School of Engineering,Sun Yat-Sen University,Guangzhou 510062,Guangdong,China
  • Received:2010-12-17 Revised:2011-04-15 Online:2011-08-25 Published:2011-07-06
  • Contact: 杨小平(1979-) ，男，博士生，主要从事太阳能热发电和蓄热研究． E-mail:bgyangxp@ dgut.edu.cn
  • About author:杨小平(1979-) ，男，博士生，主要从事太阳能热发电和蓄热研究．
  • Supported by:

    国家"973”计划项目( 2010CB227306) ; 国家自然科学基金重点资助项目( 50930007) ; 东莞理工学院自然科学基金资助项目( 2010ZQ08)

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Abstract:

In this paper,the performance of a single thermocline packed bed storage tank is analyzed,with hightemperature molten salt as the heat transfer fluid. Then,a theoretical model of the thermal storage system is established to reveal the law of thermal storage by means of numerical simulation. Moreover,the method to evaluate the performance of the thermal storage tank is put forward based on the capacity,the ability,the entropy generation,and the effectiveness,etc,and the effects of physical properties of different filler materials on the performance of the thermal storage system are analyzed. The results show that,under certain conditions of thermal storage,higher thermal conductivity are unfavourable to enhance the performance of the thermal storage tank,and that higher heat capacity per unit volume may result in better comprehensive thermal storage performance as well as high entropy generation.

Key words: molten salt, thermocline, thermal energy storage, performance