EXPERIMENTAL STUDY OF THE EFFECT OF VARIATIONS IN IMPELLER BLADE LENGTH AND INPUT ELECTRICAL VOLTAGE ON THE PERFORMANCE OF A SINGLE-COMPANIED PERIPHERAL PUMP

Pump companies, especially peripheral pumps, compete in designing pumps to get high heads following consumer desires in using pumps, such as companies, hotels or multi-storey apartments that require pumps with high heads to supply water at the required height. The purpose of this study was to analyze the effect of variations in the length of the impeller blade and input electrical voltageonthe head and efficiency ofperipheralpumps. The variations tested included impeller blade lengths of 8 mm (standard), 9 mm, 10 mm, and 11.5 mm, and input electrical voltages of 200 Volts, 210 Volts, 220 Volts, 230 Volts, and 240 Volts. The test was carried out using a single pump with a pipe diameter of ¾ inch, where the data obtained included pressure, discharge, electrical voltage, electric current, and calculations of head values, water power, motor power, and pump efficiency. The results showed that the greater the input electrical voltage, the greater the discharge and head, but decreased the pump efficiency. At 240 Volts of electric voltage, the impeller blade length of 8 mm produces a discharge of 30.10 lpm, a head of 6.13 m, and an efficiency of 12.27%. For a blade length of 9 mm, the discharge value is 29.91 lpm, a head of 6.19 m, and an efficiency of 12.06%. A blade length of 10 mm produces a discharge of 29.80 lpm, a head of 6.23 m, and an efficiency of 12.17%. While at a blade length of 11.5 mm, the discharge value is recorded at 29.95 lpm, a head of 5.82 m, and an efficiency of 11.42%.