摘要
利用1MW(th)中试光热电站的储热系统研究了熔盐储罐预热过程的热特性。通过在罐体内部、罐壁和地基等处布置热电偶进行实验,得到了预热过程的温度变化及所需预热时间,同时利用ANSYS FLUENT进行瞬态计算模拟了熔盐储罐的预热过程。结果表明,热空气能够有效预热熔盐储罐,流量为480m^3/h、温度为350℃的热空气流通1470min后,直径为1600mm、高度为2500mm的罐体壁面和罐内空气温度由室温升至240℃左右。预热过程中,罐体侧壁面和顶面温度升高较快,罐底壁面和罐体底部空气温度升高较慢,罐内壁面不同高度的温差达38℃;地基温度升高缓慢,在罐体壁面温度达到热平衡时,地基还远未达到热平衡状态。
The thermal characteristics of the preheating process of molten salt storage tank were studied using the thermal storage system of the 1 M(th) pilot solar thermal power plant. By arranging thermocouples inside the tank, on the tank wall and foundation, the temperature change and the required preheating time of the preheating process were obtained. And the transient simulation of the preheating process was performed using ANSYS FLUENT. The results show that the hot air can effectively preheat the molten salt tank. After 1470 minutes of hot air flow at a flow rate of 480 Nm^3/h and at the temperature of 350℃, the temperatures of the tank wall surface and the air in the tank with a diameter of 1600 mm and a height of 2500 mm rise from room temperature to about 240℃. During the preheating process, the temperature of the side walls and the top surface of the tank rises rapidly, while the temperature of the tank bottom and atmosphere at the bottom of the tank rises slowly. The temperature difference of tank walls at different heights is up to 38℃. The temperature of the tank foundation also increases slowly. When the temperature of the tank wall reaches equilibrium, the foundation temperature is far from reaching a thermal equilibrium state.
作者
时华
方文峰
朱义凡
周明熙
周昊
SHI Hua;FANG Wenfeng;ZHU Yifan;ZHOU Mingxi;ZHOU Hao(State Key Laboratory of Clean Energy Utilization(Zhejiang University),Hangzhou 310027,Zhejiang Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第18期5972-5978,共7页
Proceedings of the CSEE
基金
国家杰出青年科学基金(51825605)。
关键词
太阳能光热发电
熔盐
储热罐
预热
数值模拟
solar thermal power generation
molten salt
thermal energy storage tank
preheat
numerical simulation
