Performance Study of Designed Single Suction Centrifugal Pump by Increasing Face Width at the Speed of Impeller

Abstract

This paper presents the performance of single-suction centrifugal pump use in irrigation and agriculture. The mentioned parameters are the designed of centrifugal pump with face width 12 mm. This paper focus mainly on the performance of centrifugal pump for 18 mm face width variation only as the existing designed with 12 mm face width.  This paper is not doing the design and calculation for 18 mm face width. Type of pump is single stage centrifugal pump with closed impeller and 12 mm face width impeller can develop a head of 20 m and deliver 0.015 m³/s of water at 1800 rpm. This impeller has 99 mm inlet diameter, 226 mm outlet diameter, 20^° inlet vane angle and 23^° outlet vane angle. The number of vanes is 6 and input shaft power is 6 hp. The inlet width and outlet width are 26 mm and 18 mm respectively. The discharge diameter is 80 mm to operate the designed head and capacity. The performance study of 12 mm face width impeller and 18 mm face width impeller are also presented at constant speed. According to observations, theoretical head is about 15 m and experimental head is 11.24 m, by mean of flow rate in theoretically about 57% and actually 50% maximum at 25.17 L/sec capacity. In this study, the performance of 18 mm face width pump is more efficient than 12 mm face width pump at speed 1450 rpm.