华电技术 ›› 2021, Vol. 43 ›› Issue (7): 47-53.doi: 10.3969/j.issn.1674-1951.2021.07.008

• 储热材料与技术 • 上一篇    下一篇

改性八水氢氧化钡相变放热特性试验研究

窦鹏1(), 于强1, 樊占胜1, 智瑞平1, 鹿院卫1,*(), 吴玉庭1, 杨桂春2   

  1. 1.北京工业大学 传热强化与过程节能教育部重点实验室暨传热与能源利用北京市重点实验室,北京 100124
    2.中国寰球工程有限公司北京分公司,北京 102299
  • 收稿日期:2021-06-02 修回日期:2021-06-15 出版日期:2021-07-25
  • 通讯作者: 鹿院卫*(1971—),女,陕西西安人,教授,博士生导师,博士,从事可再生能源利用方面的研究(E-mail: luyuanwei@bjut.edu.cn)。
  • 作者简介:窦鹏(1995—),男,北京人,在读硕士研究生,从事相变储热方面的研究(E-mail: 15810585048@163.com)。
  • 基金资助:
    国家重点研发计划项目(2017YFB0903603);国家自然科学基金项目(52076006)

Experimental study on phase-change discharging characteristics of modified barium hydroxide octahydrate

DOU Peng1(), YU Qiang1, FAN Zhansheng1, ZHI Ruiping1, LU Yuanwei1,*(), WU Yuting1, YANG Guichun2   

  1. 1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation/ Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing 100124, China
    2. China Huanqiu Contracting & Engineering (Beijing) Company Limited, Beijing 102299,China
  • Received:2021-06-02 Revised:2021-06-15 Published:2021-07-25

摘要:

蓄热技术可有效解决可再生能源难以并网的问题。为了获得蓄热密度大的相变材料八水氢氧化钡在套管内的相变传热特性,针对课题组制备的改性八水氢氧化钡展开试验研究,分析改性八水氢氧化钡在套管内的相变放热特性。研究了冷却水进口温度、流量等参数对改性八水氢氧化钡相变过程及传热性能的影响。结果表明:提高冷水进口流量可以缩短改性八水氢氧化钡相变放热时间,但过高的进口流量会降低换热功率;提高冷水进口温度对改性八水氢氧化钡相变放热时间的影响较小,但会降低换热功率。在课题试验范围内,获得最佳进口流量为80 L/h,最大平均换热功率为251 W。

关键词: 可再生能源, 蓄热, 相变材料, 相变传热, 八水氢氧化钡, 套管换热器

Abstract:

Thermal storage technology can effectively solve the difficulty of renewable energy's grid connection. In order to obtain the phase-change heat transfer characteristics of modified barium hydroxide octahydrate in double pipes, our team prepared modified barium hydroxide octahydrate and studied its phase-change discharging characteristics in double pipes through experiments. The effects of cooling water temperature at inlet and flow rate on the phase transformation process and heat transfer performance of modified barium hydroxide octahydrate were studied. The results show that increasing the inlet flow rate of cold fluid can shorten the phase-change heat-discharge time of modified barium hydroxide octahydrate, but excessive inlet flow rate would reduce the heat transfer power; increasing the cooling water temperature at inlet has little effect on the phase-change discharging time, but it would reduce the heat transfer power as well. In the range of the experiment, the optimum inlet flow rate is 80 L/h and the maximum average heat transfer power is 251 W.

Key words: renewable energy, thermal storage, phase change material, phase-change heat transfer, barium hydroxide octahydrate, shell-and-tube heat exchanger

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