|Home News Benefits Products Services Case Studies Research Testimonials About Us|
Welcome to MannPowerMann Power Consulting Ltd brought the Archimedean Screw turbine into the UK for the first time, and has been at the forefront of supplying this equipment for hydro generation projects since 2004.
+44 (0) 1653 619968
Manor Farm, Kirkham Abbey, York. YO60 7PA
Old technology - new application
The Archimedes Screw has been used for pumping water for over 2000 years. Applying the principle in reverse, the same equipment now offers a new method for generating power from water, providing a fish friendly and highly efficient alternative to a conventional turbine. Each Archimedean Screw hydropower system is manufactured to be site-specific, with a choice of three designs - steel trough, closed compact and open compact - depending on which is the most appropriate and cost-effective for each individual site.
Click here to see a video of how a scheme can be built.
Summary of Advantages
Reduced initial investment in equipment and installation
Annual revenue over varying flows
Low maintenance costs
Short payback period + High profitability
You can watch a video of Fish and Debris tests here.
Fish Studies Summary
Since 2004, Mann Power Consulting Ltd has been supplying the Archimedean Screw as the fish-friendly answer to hydro generation. Although widely in use throughout continental Europe for some time now, the Screw was a newcomer to British rivers, and as such inevitably raised concerns - particularly within the Environment Agency - about the potential environmental and fisheries impact of the proposed installations.
On the basis of previous studies carried out in Europe which supported the claims to fish-friendliness, the Environment Agency permitted the first UK Screw installation (on the River Dart at Ashburton in Devon) to run unscreened for a year whilst monitoring was taking place. During that time, marine biologist Pete Kibel of Fishtek Ltd - in consultation with the Environment Agency and members of the Fish Pass Panel - has undertaken comprehensive live fish trials at the site and the results are extremely positive.
Literally thousands of fish passages have been monitored and recorded using underwater cameras at the intake, inside the chamber of the Screw itself and at the outflow to assess the effect of the Screw on salmonids (including smolts and kelts), brown trout and eels. The trials looked at fish passage across a broad spectrum of sizes and turbine speeds, possibly the most impressive of which was the safe passage of a kelt measuring 98cm in length and weighing 7.6kg.
The studies conclude that the Archimedean Screw turbine is indeed fish-friendly with no adverse physical effect on fully grown fish or kelts; at most 1.4% of smolts sustaining limited and recoverable scale loss (NB 'at most' because these were wild fish and quite likely to have sustained some scale damage prior to entry into the turbine) and just 1 out of 160 eels (0.64%) suffered minor and recoverable pinching to the tail. In addition, behavioural and migrational patterns across the species have been shown to be entirely unaffected by the turbine.
The implication of these findings is extremely positive for the economics of micro-hydro in the UK. Sites previously written off for hydro development owing to fish protection issues can be revisited, and the cost of installation for an Archimedean Screw turbine will be significantly reduced by the requirement for only minimal screening.
|© MannPower Consulting, 2009. Design and Development © Tom Hancocks, 2009|