高温熔盐热管的启动和等温性能

Startup and isothermal performance of high-temperature molten salt heat pipe

高温热管是高温领域高效传热的关键技术。为进一步研究开发高效热管,提升工业过程传热性能,以熔盐作为热管的传热工质,搭建了高温热管传热实验台,研究了传热工质和倾斜角对热管启动和等温性能的影响。结果表明,在450~700K工作温度范围内,AlBr3和TiCl4熔盐热管在倾斜角为45°和60°的条件下,均达到最优的启动性能;在热管倾斜角为60°时,两种熔盐热管等温性能均达到最佳。无机盐AlBr3和TiCl4作为传热工质,重力热管具有良好的启动和等温性能。

High-temperature heat pipe is the key technology for efficient heat transfer in high-temperature fields.To develop high efficiency heat pipes further and improve the heat transfer performance in industrial process,gravity heat pipes with molten salt as heat transfer medium was developed.A high-temperature heat pipe test bench was set up and effect of working fluids and inclination angles on the startup characteristics and isothermal performance of the gravity heat pipe was studied experimentally.The results showed that as the inclination angle was 45°and 60°,the startup characteristics of heat pipes with AlBr3 and TiCl4 as working fluids was the best respectively,while the isothermal performance of the heat pipes was the best as the inclination angle was 60°.The inorganic salts AlBr3 and TiCl4 are used as the heat transfer working medium,and the gravity heat pipe has good starting and isothermal properties.