Effect Of Pressure Divider Valve On Hydram Pump Efficiency

Abstract

Hydram pump is a pump that does not require external energy as the main source of propulsion, to raise water from a low place to a high place. The working mechanism of the hydram pump is to multiply the force of the water blow in the air tube, where there is a change in the kinetic energy of the water into dynamic pressure which causes a water hammer. Dynamic pressure will be forwarded into the air tube which functions as an amplifier. However, the work of this pump cannot pump all the incoming water, so some of the water is pumped and some is discharged through the waste valve. This study aims to determine the effect of using a pressure divider valve on the input power, output power and efficiency of the hydram pump. The hydram pump used in this study was an air tube with a height of 60 cm and a diameter of 3 inches. The height of the waterfall is 2 m from the pump body and the output height is 4 m. The pressure divider valve is installed at a height of 2 m from the pump body. Pressure divider valve tube lengths: 20, 25, 30, 35, 40, 45 and 50 cm. The method used in this research is the experimental method. The results showed that the highest input power was obtained at 5.53 watts when using a tube length of 20 cm and the lowest input power was obtained at 5.32 watts when using a tube length of 50 cm. the highest output power that can be pumped at 1.75 watts occurs when using a tube length of 20 cm. While the lowest output power pumped at 1.56 watts occurred when using a tube length of 50 cm. The highest D'Aubuisson efficiency was obtained at 31.6% when using a tube length of 20 cm. The lowest efficiency was obtained at 29.3% when using a tube length of 50 cm.