Dynamics Of Thermoeletric Refrigerator

Research on dynamic characteristics and control strategy on the thermoelectric refrigeration is very significant for the optimization design of refrigeration system and device and realize the advantage of thermoelectric refrigerators.In the present paper, According to the characteristics of the dynamic running of the thermoelectric refrigerating devices and its components for the refrigerator is analyzed and the independent components' models are established. The entire model describing the working procedure of the refrigerating system is set up with the method of parameters coupling to combine the models of the refrigerating system, load, cabinet and air in the cabinet. The running characteristics of thermoelectric refrigerators on the effects of received current, load and ambient temperature are investigated using small-signal linearization method.The three-dimension mathematics model for the simulation of thermoelectric refrigerator is established. With the equalization of mass conservation, momentum and energy, the main sectors of a system model can be connected and solved. In steady and transient state,air temperature field and flow field inside the thermoelectric refrigerator, loaded and no loaded, are calculated by using a CFD software PHEONICS. The specified performance experiments are conducted for OR-6SX refrigerator, and the reliability and rationality of the model is verified through the comparison of the experimental results and the simulating results. The influence of ambient temperature on the performance of refrigeration system are investigated, which can provide basis for further research, meanwhile, the corresponding changing curves are provided.