摘要
储热系统的储热能力直接关系到太阳能热发电的效率和成本。作者对以混凝土作为储热介质,熔融盐作为传热介质的储热模块的充放热特性进行了数值研究,考虑了不同参数对储热模块的影响,得到了储热模块的瞬时温度分布等参数,并对模拟结果进行了对比分析。研究结果表明:提高熔融盐入口流量可有效增强熔融盐与混凝土之间对流换热,从而提高混凝土充放热速率,但是需增加泵功消耗和储热模块长度;随着管径的增加和管间距的减小,熔融盐与混凝土之间换热面积增加,混凝土充放热速率增大,同时所需钢材量增加,从而增大储热成本。
The thermal storage capacity of thermal storage system is directly related to efficiency and cost of solar pow- er generation Numerical simulation on charge and discharge performance of thermal storage module with concrete as ther-mal storage medium and molten salt as heat transfer medium was carried out. The influence of different parameters on the thermal storage module was performed to obtain transient temperature distribution parameters. It was compared and ana- lyzed for the simulation results. The research results show that improving molten salt inlet flow can effectively enhance convective heat transfer between molten salt and concrete, thereby increasing charge and discharge rate of concrete with the need to increase consumption of pump power and length of heat storage module. With the tube diameter increasing and the spacing decreasing, the heat transfer area between molten salt and Concrete increases and charge and discharge rate of concrete also increases. But the thermal storage cost increases with the steel amount increasing.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2013年第12期1-5,共5页
Journal of Wuhan University of Technology
基金
国家科技支撑计划(2012BAA05B05
2012BAA05B06)
武汉市科技攻关(201210321094)
关键词
太阳能
混凝土
熔融盐
储热
solar energy
concrete
molten salt
thermal storage
