Applied Research Of Thermoelectric Technology On Dehumidification And Heat Storage

It is under the circumstance of energy shortages and serious environmental pollution that this paper proposed to recycle and use exhaust energy by utilizing thermoelectric technology, and explored the application way of thermoelectric technology combined with the technology of dehumidification and phase-change heat storage.First of all an interior mechanical exhaust air waste energy recovery device was designed. Considered that most of buildings generate unorganized air supply when mechanical ventilation are used, and that the unorganized air supply without any treatment would bring in additional cooling and heating load in summer and winter, the device was tried to dispose the fresh air with the thermoelectric heat pump system installed on it. The experiment on model machine shows that, the device has the dual function of increasing the indoor fresh air and reducing air conditioner energy consumption at the same time in summer and winter. The input voltage and air flow have effects on the heating efficiency of winter, the cooling efficiency of summer and the dehumidification efficiency, and the function graphs of the corresponding input voltage are quadratic curves. It should be noted that the corresponding quadratic curves of summer’s cooling efficiency and dehumidification efficiency have not coincidence. COP and optimization of dehumidification efficiency are the problem of rationalization of selecting input voltage and air flow. The unique feature of the device is that it can improve the indoor air quality while recycling and using the indoor exhaust energy, and reduce the air conditioner load.In addition, this paper discussed the heat-storing and exothermal feasibility of hase- change materials by utilizing thermoelectric heat pump, and tested the performance of model machine. The experiment results show that, the device achieved active thermal storage and release. When the working voltage and the temperature of heat source are different, the time and efficiency of accumulating and releasing heat have many differences. With high working voltage and heat source temperature, the needed time of the device to accumulate heat is much shorter. The increased working voltage can enlarge the temperature difference between the hot and cold side of semiconductor chip, and then reduce the heat coefficient. Compared with the passive phase change heat storage device, the biggest advantage is the adjustability of working voltage. Therefore, the adjustment of working voltage in a reasonable range can guarantee much higher heat-storing and releasing performance. At the same time, the device over come the disadvantages of passive phase change heat storage device which can not improve the contradictions of time, places and intensity between supply and demand.