Examine the Characteristics of R134a Refrigerant Flowing Through a Capillary Tube

Abstract

This paper meticulously delves into the intricate flow characteristics exhibited by R134a refrigerant within an adiabatic capillary tube, employing a comprehensive and controlled experimental study. The fine cylinder, with a width of 0.00107m and a length of 3.5m, works with an unequivocally managed mass stream pace of 6.6 kgh^-1 giving an ideal climate to an intensive report. The pressure within the capillary tube displayed a distinctive pattern throughout the experiment, with measurements indicating 12.95 bar at 0.5m from the inlet, gradually decreasing to 4.68 bar at a distance of 3m from the entrance. Simultaneously, a conspicuous temperature drop from 35.8°C to 14.7°C was observed at the exit point, located 3.5m from the entry of the capillary tube. To enhance the credibility of the results, the experimental data concerning pressure drop within the tube underwent a meticulous comparative analysis which revealed a coherent trend. Furthermore, this paper contributes valuable insights by presenting experimental data on temperature drop, thereby significantly enriching the understanding of the dynamic behaviour of R134a refrigerant in adiabatic capillary tubes. These insightful findings bear implications for optimizing the efficiency of refrigeration systems.