Method for calculating a two-stage thermoelectric system for local hypothermia

Abstract

Abstract. Objective. The aim of the study is to develop a methodology for calculating a two-cascade thermoelectric system (TPS) for local hypothermia, as well as a theoretical analysis of its operation.Method. The model is built on the basis of solving three problems, consisting in determining the parameters of a two-stage thermoelectric module (TEM), thermophysical characteristics of the interface system with a biological object, and heat removal for cooling the hot junctions of the thermomodule.Results. According to the calculation model, the TES was calculated for local hypothermia of soft tissues in the treatment of their inflammation and infectious formations, developed in the laboratory of semiconductor thermoelectric devices and devices of the Daghestan State Technical University. Graphs of the dependence of the change in the cooling capacity of the TEM, the coefficient of performance, the supply voltage on the temperature difference between the junctions for various values of the supply current, as well as the dependence of the voltage on the TEM on the magnitude of the supply current at various values of the temperature difference between the junctions, the change in temperature by cold junction and TEM power from the supply current. The graphs are calculated at a hot junction temperature of 300 K.Conclusion. As a result of the calculations, it was found that the TV-2-(127-127)-1.15 TEM selected as a result of the calculation will have the following characteristics: an operating power range of 8-10 W with an average temperature difference between the junctions of 65 K, the supply current is 4 .4-5.8 A with a power consumption of 45-85 W, the coefficient of performance is 0.2-0.5.

Keywords

• thermoelectric system
• two-stage thermoelectric module
• thermal effect
• hypothermia
• calculation method
• numerical experiment
• temperature