Effect of changing the thermal Expansion valve orifice diameter on Performance of Vapor Compression Refrigeration Cycle

For A computational model based on the analysis of the effect of increasing and decreasing the orifice capacity of the thermal expansion valve was presented to study the performance coefficient of the refrigerant compression cycle (R134a). Experiments were carried out on a cooling device with a thermal expansion valve with a design diameter of 2 mm, and this diameter was changed to 3 mm and 1 mm, and the results be compared. It found that the quantity of heat absorbed in the evaporator, the amount of heat released in the condenser, and the work of compressors decreased when the diameter of the valve orifice increased and decreased from the ordinary orifice. while the coefficient of performance (COP) of the cycle increased when the diameter of the valve increased and decreased when the valve decreased. The pressure ratio of the cycle was decreased when the diameter increased and increased when the diameter decreased.