Integrated Structural Design Of Regenerative Thermoelectric Direct Conversion Battery

The traditional energy supply system of the Autonomous Underwater Vehicle (AUV) can not meet the request of wider range, longer voyage and deep submergence. For this reason, a new type of underwater regenerative thermoelectric direct conversion battery is designed in this Paper. The battery including the high temperature thermal energy storage container, the thermal to electricity converter and a cooling system as a battery thermal control device. The battery size is small, light weight, high energy density, no emissions, no moving components, safety. It will have broad prospects of application.The performance of several high-temperature thermal storages are compared comprehensively in this paper, and eventually the Li/SF6 as storage medium-high temperature chemical thermal storage is carried out. The design concepts including the anti-blocking SF6 nozzle structure, the Li/SF6 reactor structure based on the surface of injection, the parameter calculation of insulating layer, the spatial layout inside the thermal storage container, which are considered by a favorable reactions of Li/SF6 and heat transfer. Based on the theoretical calculations, the stress concentration area on the component of container is checked and the temperature field interior container is simulated through finite element analysis software. Through analysis, the structure of container will be optimized more reasonable.In this thesis, it is demonstrated that we can control the power output by regulating the flow of SF6 and the cooling capacity of cooling system. The structure of cooling system is designed under the thermal control technology which depend on evaporation to absorb heat load and Capillary force developed on menisci to drive a working fluid to flow. The numerical simulation on capillary evaporator of cooling system on different heat load is used to solve the problem about the variable operating conditions of battery. Specifically, a two-dimensional numerical Model is developed to simulate the steady heat transfer with evaporation in the porous wick of evaporator. The results present that a fixed vapor-liquid interface,which can be formed the face of porous wick. In addition, the characteristics of the flow and heat transfer in the porous wick under different thermal flux have been numerically studied in this thesis.Finally, the structure of regenerative thermoelectric direct conversion battery is presented integrally.In this thesis, a comprehensive analysis about thermal, stress and flow field is presented. The conjugating on heat wall and insulation materials are solved. The numerical simulation, the calculation for performace and the analysis of energy are realized simultaneously.