Design And Research Of The Testing Device For Pressure Resistant Property Of Thermosensitive Material

The ocean is not only an important regulator of the global climate system,but also its significant component,towards which people have limited knowledge.The sustainable development of China's coastal and island economy requires a vigorous development of the marine energy resources.The underwater robot research group in School of Mechanical Engineering,Tianjin University,has made sustainable and long-term explorations of the deep ocean,in which process,the source of energy turns to be a main limitation of the operational duration and voyage of the exploration platform.The phase transition of the phase change material(PCM)can be utilized to turn the oceanic thermal energy into mechanical energy and finally into electric energy used by the exploration platform.This method can effectively solve the limitation of energy,thus greatly improving the scope of marine observation.To realize this energy conversion process,a complete set of testing device is needed for the in-depth study of the PCM physical properties under high pressure.Through adjusting temperature and external load(pressure),this device can test the rate of PCM volume change under different external loads in the solidliquid transition process,thus providing the material's property data and the heat exchanger's structure parameters for design optimization of the future study of thermoelectric generating device.On the research of the testing device for PCM physical properties,this study is divided into three subsystems with specific solution selection and analysis.The three subsystems are firstly the stepwise design and optimization of the heat exchanger's overall structure,then the overall design and research of the PCM's external loading pressure adjustment and extending volume detecting system,and finally the overall design and research of temperature control system for the water area where the heat exchanger locates.In the whole process,by using SolidWorks,this study establishes an integral virtual prototype of the testing device for PCM physical properties,determines the structure,size and layout of each component,and also checks and optimizes the key structures and components.Finally,the PCM phase change and energy storage components and the mathematical model of the driving system consists of three parts.By adopting the bacteria foraging optimization algorithm based on penalty function,the structure of plane vortex coil spring as the energy storage component optimization design.Got both energy storage component size and the size of the energy storage density,improve the efficiency of the energy storage.