Numerical Simulation And Analysis Of Thermoelectric Cooling Module In Aircraft Compartment

With the development of the electronic components of the aircraft,the temperature control in the cabin of the aircraft is more and more important.more effective cooling methods are needed to control the temperature in the cabin.Thermoelectric refrigeration is an advanced refrigeration technology.It can work against temperature gradient without refrigerant and mechanical movement,and has lower requirements for installation environment that very suitable for temperature control in aircraft cabin.In this paper,the thermoelectric cooling module is used to control the temperature in the cabin.The boundary conditions of the thermoelectric cooling module are selected according to the relevant regulations.The effects of temperature difference and the size of thermoelectric materials on the performance of the thermoelectric refrigeration module were analyzed by means of thermodynamic theory and thermoelectric coupled numerical simulation.The difference of thermal conductivity will lead to the effect of temperature difference and the difference of resistance will lead to the effect of own heat on refrigeration performance.The maximum refrigerating capacity current value,the maximum refrigerating Coefficient current value and the same power operating current value were calculated.The current value of the maximum refrigeration Coefficient is the smallest,the second is the same power operating,and the current value of the maximum refrigeration capacity operating condition is the largest.Based on the theory of thermoelectric refrigeration and the method of thermoelectric coupled numerical simulation,the temperature distribution of thermoelectric materials used for heat dissipation in the cabin of aircraft is obtained The influence of current on the temperature distribution is great under the condition of high current.The refrigeration performance of thermoelectric refrigeration module with variable cross-section area is analyzed.The shape of thermoelectric material whose cross-section area is larger than that of thermal side should be avoided.The shape of thermoelectric materials with cross-sectional area smaller than that of thermal end can not improve the refrigeration performance,but can improve the temperature distribution on the thermoelectric materials.The method of thermo-mechanical coupling based on thermo-electric coupling is adopted.Although the difference of the performance of the thermoelectric refrigeration module with different cross sections is not big,but the stress distribution and numerical value are different to some extent,stress and temperature difference and current is different.The maximum stress should be in the two materials or the connection with the outside world.