Solar photovoltaic refrigerators mainly include solar photovoltaic refrigerators and solar semiconductor refrigerators. Solar cooling has good seasonal matching, that is, the hotter the weather, the better the solar radiation, and the greater the cooling capacity of the system. This feature makes solar refrigeration technology receive attention and development. Solar semiconductor refrigeration uses the electric energy generated by the solar cell to drive the semiconductor refrigeration device and realizes the special refrigeration method of thermal energy transfer. Its working principle is mainly the photovoltaic effect and the Peltier effect.
There are actually several aspects of the convenience of solar semiconductor refrigeration technology. One is the solar-driven semiconductor refrigeration system, which is compact in structure and easy to carry and can be made into a miniaturized special refrigeration device according to user needs. Second, it has the characteristics of simple use and maintenance, good safety performance, decentralized power supply, convenient energy storage, and no environmental pollution. In addition, compared with the general mechanical refrigeration, the semiconductor refrigeration system using the Peltier effect does not require moving parts such as pumps and compressors, so there is no wear and noise. It also does not require refrigerant, so there is no environmental pollution and complicated transfer piping is eliminated. It only needs to switch the current direction to make the system change from cooling to heating.
These incomparable advantages make people have a strong interest in solar semiconductor refrigeration technology.