Increasing the Capacity of Existing Piped and open Channel Assets. Development of the Jet Boost Pump Concept
Annual Conference
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The jet boost pump concept was developed as a practical method of boost pumping piped and open channel assets to increase flow capacity, to eliminate or offset the need for new infrastructure and enable deferment or reduction in capital expense.
The jet boost pump concept is a modification of the conventional jet pump and works by diverting a portion of the flow, pressurising it and then returning it as a high energy jet. The jet energy is transferred to the flow via turbulent mixing and entrainment. Energy transfer efficiency in the order of 10% to 25% and the addition of 0.5m to 2.0m energy head is achievable in a single pumping application.
Research undertaken with the University of Canterbury tested and validated the jet boost pump concept and established preliminary design methods using experimental data and non-dimensional analysis.
Jet boost pumps have potential use particularly where hydraulic grade lines are ‘flat’, velocities are slow and the cost of conventional engineering solutions is high. Potential applications include storm water and sewer trunk mains, open channel drains and ocean outfalls.
This presentation will outline the concept, establish hydraulic principles, outline the development and testing undertaken to date and present worked examples of its potential application.