Study On Characteristics Of Thermoelectric Cooling System For Liquid Cooling Garment

High temperature radiation and high environmental temperature is the main reason which is a big threat to the health of the high temperature operation personnel. Liquid cooling garment system is a kind of personal protective equipment which can maintain the stability of the body’s core temperature. They are worn by worker working under high temperature environments or in closed overalls to absorb body’s heat load. Liquid cooling garment system consists of liquid cooling garment and micro cooling system. Thermoelectric cooling device has a very wide application prospect and future development in the body thermal protection because of its compact structure and no moving parts.The theoretical analysis to the thermoelectric cooling device performance influence was carried on which is in connection with size factor of thermoelectric element, thermoelectricity material figure of merit coefficient, working current and the heat transfer coefficient of hot-side and cold-side. The theoretical analysis shows that the thermoelectric materials of high figure of merit should be chosen and the appropriate value of G should be selected when making the thermoelectric cooling element. In actual operation, the appropriate value of the working current makes cooling performance better and the optimal design of hot-side’s and cold-side’s structures is very important to improve the cooling performance. It provides the theory foundation for development design of thermoelectric cooling product and the optimization design of thermoelectric refrigeration device.In order to get hot-side’s and cold-side’s best structures of thermoelectric refrigeration device and optimum operating conditions, different experiments were conducted according to different hot-side’s and cold-side’s structures and different input power. The experimental results show that, in a certain input power range, no matter what the heat transfer coefficient of hot-side and cold-side is, the cooling capacity increases and the coefficient of performance decreases when input power increases. In a certain range, the cooling capacity and the coefficient of performance increases when the heat transfer coefficient of hot-side and cold-side improves. For the radiating structure of the hot end, water cooling is the best and heat pipe cooling is better and fins are the worst. For the structure of the cold end, the micro channel water tank is the best.According to the theoretical analysis and experimental results, the design of thermoelectric cooling module is completed. The thermoelectric cooling module in which the hot-side is the heat pipe radiator and the cold-side is the micro channel water tank provided cooling capacity of185W and cold water of above16℃. At the same time, this paper shows the framework design of control system which provides theoretical basis for the design of temperature control system and.for experiments of liquid cooling garment.