| Phase change energy storage technology has been widely used in the field of energyengineering, such as construction industry, solar energy storage. At present, how the energystorage technology successfully applied in the field of car,especially the on-board energylimited electric vehicles has received more and more attention. Therefore, the article basedon refer to a large number of phase change energy storage technology, and the research ofthe application in the field of automobile, design of different structure forms of on-boardefficient changes in temperature phase change energy storage device. Connect with thepower battery system, electric control unit, heat pump, PTC heater etc, and storage the heatgenerated by the associated equipment. When the car produced waste heat insufficient,connect the external heating equipment. When the temperature of the power batteries andelectric control system is out of control, the energy stored in device can release in time. Notonly conducive to energy reuse, but also improve the thermal stability and temperaturecomfort of the electric power system. Excess heat can also be used for heating of theautomobile cabin, and reduce automobile electrical energy consumption. It has goodinternal structure, high efficiency of accumulation and release and time high responsiveness.Research work is mainly carried out structure design and its influencing factors of phasechange energy storage device performance analysis. Provide experimental data of phasechange heat storage device for application on electric car.First of all, we put forward flat tube of the heat storage unit with small dimensions oftube bundle packaging structure phase change energy storage device, through thetheoretical calculation of the total heat storage, determine the structure size. System tocarry out the tube bundle arrangement, inlet temperature and flow rate of medium, theinitial temperature on the influence of the regenerative process and exothermic process. Studies have shown that the flat tube bundle heat storage structure has High rate of phasetransition, especially on the cross arrangement of flat tube. It can meet the engineeringdemands for time response of the accumulation of heat and heat release. The fluid flow hasan great influence on exchange heat power and the cumulative heat storage. The best fluidflow is5L/min, if the fluid flow is too large will weaken the heat transfer power instead.Inlet temperature has great influence on heat transfer time. Initial temperature decided toexport temperature of high and low.In order to further increase the amount of PCM encapsulation and maintaining high inthermal efficiency, we design tube fin type of an energy storage device. Not only on itsheat storage experiments carried out, but also cool storage experiment was carried out,include temperature change characteristics and thermal response characteristics.Experimental study on energy storage box sorting change. Studies have shown that thisstructure has high response speed in the process of phase transition. Has a largercumulative heat storage compared with the structure of flat tube bundle. Melting point andthe inlet temperature has great influence in the total energy. Fluid flow mainly affect thetime responsiveness. Reasonable use method of energy storage box sorting can effectivelyoptimize the energy storage effect.In order to further analysis of dispersion type sphere accumulation regeneratorperformance, exploring energy storage performance and features of energy storage, we putforward another sphere unordered accumulation heat storage structure. Systemanalysis encapsulation single phase change materials Outlet temperature changes over timeand PCM temperature changes over time in benchmark conditions. Hierarchicalarrangement of Melting point phase change materials impact on heat storage and release.Studies have shown that the main reason of restricting the heat transfer time of the overallstructure is not the number of sphere, but a single ball phase transition time. Hence, smalldiameter storage ball significantly improve the overall thermal efficiency. Reasonablehierarchical arrangement of phase change materials can store different temperature of heatand regulating the export flow temperature. The solid-liquid interface position in energy storage ball, in turn, phase change over time. High melting point PCM can enhance heattransfer performance. Increase the flow helps to enhance thermal power. |
PDF Full Text Request