【摘要】 分别以AlBr₃和TiCl₄作为传热工质，通过实验方法，研究工质、充注量、加热功率和热管倾斜角对熔盐重力热管传热性能的影响，以等效传热系数评价热管的传热性能。随着倾斜角增加，AlBr₃、TiCl₄热管的等效传热系数均呈现先增加后减小的趋势。随着充注量增加，AlBr₃的最大等效传热系数降低，TiCl₄热管的最大等效传热系数先升高后降低。加热功率影响热管的传热性能，在最佳热管倾斜角及最佳充注量下，随着加热功率增大，等效传热系数增大。充注量为100 g、热管倾斜角为60°、加热功率为2 450 W时AlBr₃热管等效传热系数最大，达到16 500 W/（m²·K）。充注量为40 mL、热管倾斜角为60°、加热功率为600 W时TiCl₄热管等效传热系数最大，达到12 500 W/（m²·K）。AlBr₃热管的传热性能优于TiCl₄热管，AlBr₃热管更符合中温热管的技术要求。更多还原

【Abstract】 Using AlBr₃ and TiCl₄ as heat transfer working fluids, the effects of working fluid, filling amount, heating power and heat pipe inclination angle on the heat transfer performance of molten salt gravity heat pipes are studied through experimental methods. The heat transfer performance of heat pipes is evaluated by equivalent heat transfer coefficient. As the inclination angle increases, the equivalent heat transfer coefficients of AlBr₃ and TiCl₄ heat pipes show a trend of first increasing and then decreasing. As the filling amount increases, the maximum equivalent heat transfer coefficient of AlBr₃ heat pipe decreases, while the maximum equivalent heat transfer coefficient of TiCl₄ heat pipe first increases and then decreases. The heating power affects the heat transfer performance of the heat pipe. Under the optimal inclination angle and filling amount of the heat pipe, the equivalent heat transfer coefficient increases with the increase of heating power. When the filling amount is 100 g, the inclination angle of the heat pipe is 60°,and the heating power is 2 450 W,the equivalent heat transfer coefficient of AlBr₃ heat pipe is the highest, reaching 16 500 W/（m²·K）. When the filling amount is 40 mL,the inclination angle of the heat pipe is 60°,and the heating power is 600 W,the equivalent heat transfer coefficient of TiCl₄ heat pipe is the highest, reaching 12 500 W/（m²·K）. The heat transfer performance of AlBr₃ heat pipe is better than that of TiCl₄ heat pipe, and AlBr₃ heat pipe is more in line with the technical requirements of medium temperature heat pipe.更多还原