Performance evaluation of a commercial positive displacement pump for wind-water pumping

This paper presents the experimental performance test evaluation of a commercial wind-driven positive displacement pump type JOBER of 3 in diameter. Results of the behaviour of pump lift rod peak force, in relation with the lift rod elasticity and the piston valve closure delay are presented. The pump performance is analysed in terms of its volumetric and overall efficiencies. Evidence about a possible effect of the piston valve closure delay over the pump overall efficiency is also discussed.