2.Experimental Full

ABSTRACT This paper represents an experimental investigation of effect of pitch and length on the flow of eco-friendly gas in an adiabatic serpentine capillary tube. In this experimental investigation azeotropic blend (30% propane,55% nbutane, 15% iso-butane) is used as refrigerant. During the experiment it has been seen that the mass flow rate of refrigerant through the serpentine capillary tube has been greatly influenced by the pitch as well as the length of capillary tube. Various capillary tubes with different length, inner diameter and pitches are prepared as test sections. The inlet pressure of capillary tube is kept constant and the mass flow rate for different capillary tubes is measured for different pitches and lengths. To obtain the mass flow rate through the straight capillary tubes experiments for straight capillary tubes has also been conducted. Mass flow rates of serpentine capillary tubes are compared with mass flow rates of straight capillary tubes and it has been found that the mass flow rates of serpentine capillary tubes are less than that of the straight capillary tubes.