熔盐阀在熔盐储能系统中的伴热应用现状及优化

Application Status and Optimization of Heat Tracing of Molten Salt Valve in Molten Salt Energy Storage System

熔盐储能技术是当前主流的高温蓄热技术之一。熔盐凭借成本低、热容高、安全性好等优点,在熔盐储能系统中成为首选储能介质。但熔盐熔点较高,熔盐储能系统中易出现凝固冻堵现象,因此防凝伴热在系统运行中有足轻重的作用。相比系统中结构简单的熔盐管道,熔盐阀内相对复杂的结构使防凝问题成为关键。为探究熔盐阀上的防凝电伴热的节能优化问题,以一新型储能系统供蒸汽项目为研究对象,针对系统中各熔盐阀使用环境及所用熔盐物性,采用软件进行熔盐阀的模型组建,并对熔盐阀电伴热温度进行优化分析。

Molten salt energy storage technology is one of the mainstream high-temperature heat storage technologies.Molten salt has become the preferred energy storage medium in molten salt energy storage system because of its low cost,high heat capacity and good safety.However,due to the high melting point temperature of molten salt,it is easy to freeze and block,so that anticondensation heat tracing plays an important role in the operation of the system.Compared with the molten salt pipeline with simple structure in the system,the relatively complex structure in the molten salt valve makes its anti-condensation problem become the key.In order to explore the energy-saving optimization of anti-condensation electric heat tracing on molten salt valves,taking the steam supply project of the new energy storage system as the research object,the software was used to establish the model of molten salt valves according to the service environment and physical properties of molten salt used in the system,and the electric heat tracing temperature of molten salt valves was optimized.