熔盐储罐冷却过程的瞬态分析

doi:10.12028/j.issn.2095-4239.2017.0011

储能科学与技术 ›› 2017, Vol. 6 ›› Issue (4): 782-788.doi: 10.12028/j.issn.2095-4239.2017.0011

熔盐储罐冷却过程的瞬态分析

顾清之，张艳梅，关弘扬，张亚伟，段洋，廖文俊

上海电气集团股份有限公司中央研究院，上海 200070

收稿日期:2017-02-08 修回日期:2017-03-31 出版日期:2017-07-01 发布日期:2017-07-01
通讯作者: 顾清之（1988—），男，硕士，工程师，主要研究方向为高温熔盐储热，E-mial：guqzh@shanghai-electric.com。
基金资助:
上海市重大技术装备研制专项（ZB-ZBYZ-02-14-1049），上海市产业转型升级发展专项资金（JJ-YJCX-01-16-0971）

Transient analyses of a molten salt heat storage tanks

GU Qingzhi, ZHANG Yanmei, GUAN Hongyang, ZHANG Yawei, DUAN Yang, LIAO Wenjun

Central Academe, Shanghai Electric Group Company Limited, Shanghai 200070, China

Received:2017-02-08 Revised:2017-03-31 Online:2017-07-01 Published:2017-07-01

摘要/Abstract

摘要： 太阳能热发电易于和储热系统结合，通过储热系统，能够使电站平稳输出电力，因此是一种非常有前景的发电方式。熔盐储罐是储热系统中的重要设备，本工作建立了熔盐储罐冷却过程的模型，通过FLUENT计算，获得了熔盐储罐在不同情况下的散热量及熔盐储罐中熔盐温度下降的规律。计算发现，整个熔盐储罐中熔盐温度比较平均，但接近底部的熔盐发生了温度分层的现象；相同条件下，熔盐液位越高，熔盐发生凝固所需的时间越长，低温罐低液位（290 ℃，0.9 m）时所需凝固时间最短，只要3.8天开始凝固，19.3天后便完全凝固

关键词: 储热系统, 熔盐, 冷却, 数值模拟, 太阳能

Abstract: In this work, a computational fluid dynamics model is developed to analyze the cooling process of a molten salt tank during a standby period. The heat losses and temperature distribution under different conditions are obtained through the calculations. It is shown that the temperature distribution in the tank is mostly homogeneous, except for a temperature stratification closed to the bottom of the tank. Under the same conditions, the higher the level of molten salt, the longer time needed for the solidification of molten salt. For the cold tank at low molten salt level (290 ℃, 0.9 m), the estimated onset of solidification occurs in 3.8 days, and all the molten salt is solidified in 19.3 days.

Key words: thermal energy storage system, molten salt, cooling process, numerical simulation, solar energy

顾清之，张艳梅，关弘扬，张亚伟，段洋，廖文俊. 熔盐储罐冷却过程的瞬态分析[J]. 储能科学与技术, 2017, 6(4): 782-788.

GU Qingzhi, ZHANG Yanmei, GUAN Hongyang, ZHANG Yawei, DUAN Yang, LIAO Wenjun. Transient analyses of a molten salt heat storage tanks[J]. Energy Storage Science and Technology, 2017, 6(4): 782-788.

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熔盐储罐冷却过程的瞬态分析

Transient analyses of a molten salt heat storage tanks

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