Dynamic Model of a Wind-Driven Lift Pump

This paper examines the dynamics of one of the oldest pieces of equipment known to mankind, the simple lift pump. These continue to be used in remote areas of the world for lifting water by hand or using wind power. In the case of the smaller modern wind-powered water pumps the speed of operation is such that dynamic factors need to be taken into account when designing the pump. The paper explores the value of introducing softness and elasticity into either the lift rod or the riser support. Output from models describing the pump dynamics are compared with experimental data.