Through the change of semiconductor refrigeration composition and the control of the current, it can form a variety of controllable specific applications, such as thermal energy (temperature difference) power generation, can be used in military, aerospace, civil energy, and other fields; Thermoelectric, thermoelectric refrigeration: in contrast to the thermoelectric power generation, converts electrical energy into heat energy, produce thermoelectric refrigerator, because this type of only devices without compressor, also need not freon refrigerant, and has simple structure, small volume, light weight, high speed, high reliability, long service life, no noise, etc.