Research Of Semiconductor Refrigeration Performance And Temperature Control

Military, medical, scientific research, often in a small space to achievehigh-precision low-temperature environment to meet specific application, butthe traditional mechanical compression refrigeration mode because of itsunpopular shortcomingssuch as large size, energy consumption, pollution, loudnoise, being not easy to control and so on, has been unable to meet the coolingrequirements, based on the Peltier effect semiconductor refrigerationtechnology with the advantages of smallvolume, fast cooling, no pollution,high precision accuracy, the best solution is applied to this area. However, thetechnology about how to improve the refrigeration rate and control precisionby using a semiconductoris not mature enough at present.This paper takes asmall semiconductor refrigeration test box as anexample, having studiedtheperformance of semiconductor refrigeration and temperature control algorithmfrom the following four aspects: the improvement of semiconductorrefrigeration speed, uniformity, stability and eliminating the error. Mainworkwhich have been done are as follows:Based on the semiconductor refrigeration and heat transfer theory, bycalculating the semiconductor refrigeration condition, make out the optimaldesign of the working conditions. By exerting the ANSYS numerical analysisand calculation of cooling load on the semiconductor refrigeration spacetemperature field theory, get the optimal structure design of semiconductorrefrigeration testbox.Establishthe Matlab/Simulink model of constant coolingcapacity system.The simulation results have proved the ultimate capacity ofsemiconductor refrigeration piece. For the constant temperature control of highstability, high precision semiconductor refrigeration system, use the PIDcontrol mode, establish the simulation model of the control system, useSimulink simulation module, analyze the simulation results, to verify the PIDcontrol mode can meet the design requirements perfectly.This paper have mainly researched the effect of different cooling power,refrigeration installation position, the ambient temperature and the electric current size and other factors on the performance of semiconductorrefrigeration by experiments,providing a theoretical reference for theimprovement of semiconductor refrigeration speed.Through to thesemiconductor refrigeration box design and temperature control system ofresearch, the semiconductor cooling performance optimization anddevelopment lab environment was obtained, on this basis, the optimal controlscheme and parameters are obtained on the experimental analysis of therefrigeration performance and constant temperature control, provide atheoretical basis for the improvement of semiconductor refrigeration rate andcontrol precision.