31-03-2017, 09:46 AM
Cooling can be defined as the process of extracting heat from a substance using a heat exchanger. Spatial cooling is the same phenomenon as cooling, although heat is extracted from a defined space, to ensure that the temperature in the space is kept lower than the surroundings. Refrigeration has been required since early times. Food materials begin to decompose at higher temperatures. Preservation of food caused the commercial use of a refrigerator. Refrigeration has been used commercially since 1900. Traditional refrigeration and space cooling techniques have made use of the refrigerator, air cooler or air conditioning. The main components of a traditional refrigeration system are compressor, condenser, evaporator and butterfly valve. The main drawback of these systems is that they consume large amounts of electricity, are expensive and not feasible for use when electricity is unreliable. This has led to the consideration of alternatives to cooling and space cooling. There is a huge market and demand for thermoelectric cooling, except for some drawbacks that can be easily overcome with serious consideration. A thermoelectric module belongs to the semiconductor family that acts as a heat pump. It works on the Peltier effect to produce the required output. The operation of the Peltier refrigerator is a function of the atmospheric temperature, the hot side of the heat sink performance and the cold side of the heat sink performance, the thermal load and the Peltier electrical parameters. This review also focuses on the use of solar energy to provide the maximum use of unconventional energy sources to allow the use of greener technologies. Thermoelectric cooling has not been considered as a very feasible system due to its high sensitivity to voltage and current fluctuations. The fluctuations in the case of the thermoelectric modules cause them to work in reverse, causing the flow of heat to the space destined for cooling. These drawbacks have been considered and a review of suggested methods that help improve the performance of systems employing thermoelectric cooling has been listed here. The concept of solar energy use came to light after the growing energy crises on our planet. The need for sustainable fuels is higher than ever. Cleaner and greener alternatives are also recommended to offset the damage created by conventional fuels so far. The portability of this system helps in easy transportation. The use of solar energy as a source is a boon to a large number of people from economically backward sectors. The COP and the correct analysis of the TEC application can be carried out using performance charts.
Related video is here :