华南理工大学学报(自然科学版) ›› 2011, Vol. 39 ›› Issue (8): 72-76,108.doi: 10.3969/j.issn.1000-565X.2011.08.013

• 化学化工、能源 • 上一篇    下一篇

高温熔融盐单罐蓄热模型与热性能研究

杨小平1,2 杨晓西2 丁静3 杨敏林2 蒋润花2   

  1. 1.华南理工大学 传热强化与过程节能教育部重点实验室,广东 广州 510640;2.东莞理工学院 广东省分布式能源系统重点实验室,广东 东莞 523808; 3.中山大学 工学院,广东 广州 510062
  • 收稿日期:2010-12-17 修回日期:2011-04-15 出版日期:2011-08-25 发布日期:2011-07-06
  • 通信作者: 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
  • 作者简介:杨小平(1979-) ,男,博士生,主要从事太阳能热发电和蓄热研究.
  • 基金资助:

    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)

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

Yang Xiao-ping1,2  Yang Xiao-xiDing JingYang Min-linJiang 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)

摘要: 分析了高温熔融盐作为传热流体的单罐斜温层填充床式蓄热器的性能.建立了斜温层单罐蓄热系统的理论模型,并通过数值模拟计算揭示了其蓄热规律.根据系统蓄热量、蓄热能力、熵产和蓄热有效性等确定了评价蓄热器性能的方法,并分析了不同填充材料的物性对斜温层单罐蓄热系统性能的影响.结果显示,在一定的蓄热条件下,较大的导热系数不利于提高蓄热器的蓄热性能,单位体积热容较大时综合蓄热性能较好,但其系统熵增也较大.

关键词: 熔融盐, 斜温层, 蓄热, 性能

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