The Stirling cycle consists of a closed refrigeration cycle. In all cooling systems, including the reverse Stirling cycle, net work input must be compatible with the second law of thermodynamics. This is achieved by moving the gas in the system back and forth between the hot and cold ends to make the temperature during compression higher than the temperature during expansion. As a result, the work of the gas during compression is greater than the work done during expansion. Hot and cold tips are also defined as compression and expansion spaces, respectively. As a result, the heat is removed from the hot end of the heat exchanger during the process (condenser), and the heat is drawn from the cold end through the heat exchanger and cooled . The heat exchanger functions as a warm condenser and the cooler as an evaporator.
Stirling refrigeration cycle
The free piston machines (FPSC) used in this system are provided with a new free piston technology, which is not mechanically connected to the crankshaft but supported by a planar spring or gas spring, and a moving magnet applied to the pistol. This system started as a solar energy system. FPSCs are compact, helium-filled (up to 20-30 atm), hermetically sealed Stirling cooling machines. Heat exchangers must be connected to the hot and cold ends of the FPSC to provide heat sinking and drawing. The cooling capacity of FPSC units is in the range of 40-100 watts. The use of FPSC in household and portable refrigerant applications, freezers and beverage vending machines is evaluated experimentally. The EER value of the FPSC ranges from 2 to 3 at colder temperatures up to 0 ° C. At -40 ° C applications, the EER value decreases to about 1.