The refrigeration cycle is made up of 5 main components which will be explained in this essay. Many different factors make refrigeration work. We'll also review the basics of refrigeration, how the refrigeration cycle works, and types of heat transfer. First, I will discuss exactly what is happening on the low pressure and low temperature side of the refrigeration system. The refrigerant passes through the expansion valve which regulates the flow of the refrigerant between the high and low sides. The cold liquid at low pressure then goes to the evaporator where heat from the interior air is absorbed and turns the liquid into a gas. The low pressure hot gas then moves to the compressor where it is then compressed into a high pressure hot gas. Then the refrigerant moves to the next side of the refrigeration cycle, which is the high pressure side. The refrigerant leaves the compressor as a gas at high temperature and high pressure, then moves to the condenser. At the condenser, the hot gas is condensed into a liquid and its heat is transferred to the outside air. The refrigerant then moves from the condenser to the expansion valve where flow is restricted and lowers the pressure as the refrigerant leaves the expansion valve. There are three different types of heat transfer: conduction, convection and radiation. Radiation is heat transfer that involves heat absorption, like the sun produces heat and the Earth absorbs heat. The second is conduction, which is the process of transferring heat through the metal. an example of this would be heating one end of a metal pipe and the other end of the pipe would start to get hotter. Finally, there is convection, which is the transfer of heat...... middle of paper ...... heat. The tube within a tube is constructed by placing one tube within a second tube. The shell and tube condenser uses cold water in the tubes, feeds the hot refrigerant, and condenses the refrigerant when it comes into contact with the tubes. The evaporative condenser uses an open jet or spilled water to cool a condenser. The metering device of a refrigeration unit regulates the flow of refrigerant to the evaporator and divides the high pressure side from the low pressure side of the system. The capillary tube generally consists of a predetermined length of tube having a small internal diameter. A thermostatic expansion valve measures the refrigerant based on different temperatures and pressures. The type that operates in response to evaporator pressure is called an automatic expansion valve. Refrigerant lines carry refrigerant liquid and vapor between system components..