Performance analysis of 1 PK split AC with variation of capillary and refrigerant pipe length R410a

Technological developments in the industrial sector are overgrowing from time to time—especially the machining part and the demands of consumers who want workpieces of good quality and efficiency. Product quality is an absolute thing that must be considered in the machining process, especially in the cooling machine. The capillary tube in the Air Conditioner engine expansion device is essential because it connects two different pressure sections, high pressure, and low pressure. Although in this study, the method used is the experimental method, the practical approach serves to determine how effective the variation of the length of the capillary tube is on the performance of the 1 PK split AC cooling machine with capillary pipe lengths of 70 cm, 60 cm, and 50 cm, diameter of 3.4 mm, parameters determine performance. AC by determining its COP value. The results of the research conducted for 60 minutes showed that the variation of the capillary tube length on the version of the LG branded Split 1 PK AC led to the highest COP results in modifying the 70 cm capillary tube length of 6.8557 kJ/kg.