The Study of The Number and Position of Installed Air Chamber Affecting on The Pressure in The Water Transmission System

Abstract

“Air Wares” is an accessory that Thai farmers have widely applied in the water pumping system to increase the flow rate and deliver water over longer distances. To manage the appropriate installation of Air Ware, this study, therefore, aims to examine the effect of the number of Air Wares and the installation space between air wares on the pressure in the water supply system. Apart from the master Air Wares from Royal Irrigation Department, this experiment connected additional Air Wares, changing from two to three air wares. The findings indicated the ideal minimum and maximum flow rate of 160 and 380 liters per minute obtained by
varying five flow rates. Furthermore, the pressure of delivery pipes showed no significant differences from the plain tube when installing one two three air wares. However, three air wares contribute to better air trapping in a pipe and lesser flow rate fluctuation than one to two Air Wares and the plain tube. The maximum distance that affects the water supply system for the Air Wares installation is 1.5 meters from the pump. Additionally, the most appropriate time to control the valve and maintain the pressure in pipes is to close the gate for 7 seconds and open the gate within 5 seconds.