Hydraulic air pumps for low-head hydropower

The exploitation of low-head hydropower by pressure interchange with air, using siphons

The paper describes and analyses a hydropower system based on siphons in which the pressure of low-head water is converted into air pressure. The analysis suggests that, with careful design of the  ow passages to minimize losses, air-pumping efŽ ciencies of 70 per cent or more should be achievable; the overall efŽ ciency of the hydropower system should be better than 60 per cent. Although such...

Optimal Sizing of Low Head Hydropower Plant- A Case Study of Hydropower Project at Head of UCC (Lower) at Bambanwala

Pakistan is facing serious shortfall of electricity for few decades. Small hydropower projects can alleviate the worsening situation. The sizing of a low head hydropower plant plays a vital role in establishing the feasibility of the project. The plant needs to be optimized for energy produced, efficiencies of the plant components, number of units and its financial/economic parameters. This pap...

Water level control system for a low-head run-of-river variable speed small hydropower plant

This paper presents part of the work carried out within the framework of a research project entitled Application of variable speed and intelligent control technologies to hydropower generation. Specifically, it is focused on the activities performed in order to achieve one of the main objectives of the project: the design of a water level control system for a low-head run-of-river variable spee...

Flow versus pressure control of pumps in mobile hydraulic systems

This work studies an innovate working hydraulic system design for mobile applications, referred to as flow control. The fundamental difference compared to load sensing systems is that the pump is controlled based on the operator’s command signals rather than feedback signals from the loads. This control approach enables higher energy efficiency since the pressure difference between pump and loa...

Hydraulic Aspects in Design and Operation of Axial-flow Pumps