The Research On Structure And Performance Of BASE Component

The Alkali Metal Thermal to Electricity Converter, AMTEC for short, is a novel energy convertion technology. This technology uses liquid or gaseous alkali metal (such as lithium?potassium and sodium)as the working fluid. It can be suitable for many kinds of heat resources,such as solar energy?chemical energy?nuclear?burning garbage and more other kinds of energy. AMTEC is a kind of converter which has many advantages such as simple structure?high conversion efficiency?high power density?high reliability?low maintenance requirements?non-noise and non-pollution. Therefore, it's very significant to study this technology.In this paper, the structure and performance of the BASE components in the AMTEC have been analyzed .including:1. With the thermal-structure coupling function of ANSYS software, we analyzed the structure and processing technology of the original BASE component, calculated the original BASE's welding temperature field?welding stress and deformation in order to analyzed the original BASE's rationalization. And we analyzed the maximum operating temperature that the original BASE can withstand.2. Improved the structure of the original BASE component and Adoptd the new technology to make BASE component. We analyzed the new design. And according to the existing material parameter, we calculated the maximum pressure that the improved BASE component can withstand and analyzed the maximum operating temperature that the improved BASE component.3. MATLAB/SIMULINK numerical simulation software is applied to simulate the original BASE component and improved BASE component, including: BASE model,Electrode G - B model, Electrode V - I characteristic model, Electrode efficiency model. We calculated the output characteristic of the original BASE components and improved BASE component, and compared the output voltage, the output power and efficiency of these two structures.The results show that: the largest residual stress of the original BASE component appeared in the welding scam of structural ceramics and kovar alloy. And the largest residual stress is less than the material yield limit on the same temperature. The welding deformation is tiny. Therefore the welding process is reasonable. The highest temperature that it can withstand is 660K; the largest residual stress of the improved BASE component is less than the yield limit. The welding deformation is tiny. Therefore the welding parts can satisfy the use requirement. The improved BASE component can withstand the external pressure of 0.354MPa. And meet the sealing requirementsunder the temperature of 1073K. The improved BASE component is superior to the original BASE component in terms of the work temperature, load voltage, output power density and efficiency.