华电技术 ›› 2021, Vol. 43 ›› Issue (7): 75-81.doi: 10.3969/j.issn.1674-1951.2021.07.012

• 储热材料与技术 • 上一篇    

基于CFD方法的熔盐储罐预热分析

王鼎1(), 肖虎1, 陈宇轩1, 岳松2, 张燕平1,*()   

  1. 1.华中科技大学 能源与动力工程学院,武汉 430074
    2.湖北省电力勘探设计院有限公司,武汉 430040
  • 收稿日期:2021-05-05 修回日期:2021-06-15 出版日期:2021-07-25 发布日期:2021-07-27
  • 通讯作者: 张燕平
  • 作者简介:王鼎(1997—),男,安徽滁州人,在读硕士研究生,从事太阳能光热发电中传热与储热装置模拟方面的研究工作(E-mail: 741099174@qq.com)。
  • 基金资助:
    国家重点研发计划项目(2018YFE0127500)

Preheating analysis on molten salt storage tank based on CFD method

WANG Ding1(), XIAO Hu1, CHEN Yuxuan1, YUE Song2, ZHANG Yanping1,*()   

  1. 1. School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China
    2. Hubei Electric Engineering Corporation Limited,Wuhan 430040,China
  • Received:2021-05-05 Revised:2021-06-15 Online:2021-07-25 Published:2021-07-27
  • Contact: ZHANG Yanping

摘要:

在碳中和背景下,构建新型电力系统需要储能技术的支撑。熔盐储罐预热是保证光热电站储热系统安全运行的重要环节之一。以某实际光热电站中的熔盐储罐为研究对象,采用等阶梯式升温预热方案,基于计算流体动力学(CFD)方法,对预热过程中储罐的温度分布进行数值模拟,探究了预热气体喷射角和储罐尺寸对预热过程的影响。结果表明:预热过程中,罐体底板与侧壁交界的边缘处温度最低。减小预热气体喷射竖直角或增大喷射周向角均可有效缩短储罐预热时间。相同预热气体进出口条件下,储罐内径的增大会导致预热时间的大幅增加。

关键词: 光热电站, 储热系统, 熔盐储罐, 预热, 数值模拟, 热损失, 碳中和, 储能

Abstract:

Construction a modern power system to pursue carbon neutrality need the support of energy storage technology. The preheating for molten salt storage tanks is an important link to ensure the safe operation of thermal storage system in CSP plants. Taking the molten salt storage tank of a CSP plant as the research object, the temperature distribution in the tank during the equal-step preheating process is numerically simulated based on the computational fluid dynamics (CFD) method. The influences of the preheating gas injection angle and tank size on the preheating process are explored. The results show that the temperature at the junction of the bottom plate and the side wall is the lowest during preheating. Decreasing the vertical injection angle of preheating gas or increasing its circumferential angle can effectively shorten the preheating time of the storage tank. Under the same preheating gas inlet and outlet conditions, the increase in the inner diameter of the storage tank can result in a substantial increase in the preheating time.

Key words: CSP plants, heat storage system, molten salt storage tank, preheating, numerical simulation, heat loss, carbon neutrality, energy storage

中图分类号: