Evans Water Engineers

EVANS ENGINEERING

TRECARRELL MILL · TREBULLETT · LAUNCESTON · CORNWALL · UK · PL15 9QE
+44 1566 782285 · www.evans-engineering.co.uk · email sales@evans-engineering.co.uk

ALLSTREAM RANGE'

of

BESPOKE WATER TURBINES

(for power outputs up to 1500 kW)

The ‘Allstream’ range of bespoke turbines encompasses all those projects that do not fit within our ‘Mainstream’ modular range or within our ‘Powerstream’ water-motor range. These projects are either large enough to warrant a special design or require original innovations.

For projects with outputs over 50 kW and up to 1500 kW we would offer a ‘bespoke design’ because even small improvements in performance gained by matching the site exactly, will pay for themselves is a very short time.

Evans Engineering is one of the few companies that can design and manufacture one-off turbines for unusual or research projects. Listed below are some of the many different projects that we have handled over the last 35 years.

MINI-HYDRO TURBINES

For power outputs between 50 and 1500 kW

Above is a win runnert Pelton turbine rated at 1MW and operating on 78 metres of head.

(Top of page: a horizontal shaft Pelton turbine rated at 1MW with as cast stainless steel runner.)

Above is a vertical shaft two jet Pelton turbine rated at 200 kWe and operating on 60 metres of head.

horizontal shaft three jet Pelton turbine

Above is a horizontal shaft three jet Pelton turbine with a 400 kVA induction generator.

vertical shaft eight jet Pelton turbine

Above is a vertical shaft eight jet Pelton turbine for a low head variable flow application.

horizontal shaft single spear-jet Pelton turbine

Above is a horizontal shaft single spear-jet Pelton turbine for a water treatment works.

cross-flow turbine

Above is a cross-flow turbine rated at 150 kW on an operating head of 42 metres.

 

SPECIAL-HYDRO TURBINES
For special liquids and applications

By its nature this is an area that is undefined and often associated with an R & D or restoration project.

THE OPERATING HEAD has ranged from the first 'Tidal Stream Turbine' in the UK where the kinetic head is less than half a metre, to a record 1000 metres of head for a batch of small turbines for offshore applications in the Middle East.

tidal stream turbine

Above is a 3.5 metre diameter tidal stream turbine with cast aluminium blades and submersible generator.

THE TEMPERATURE of the operating fluid has ranged from a low of –1000C (liquid CO2) in a prototype refrigeration system, to a high of 500C and ph 9 from a hot soda spring in Africa

THE SIZE OF TURBINE has ranged from a minute 12 mm diameter to the 3.5 metre turbine above that is a model of the real thing at 15 metres.

A SELECTION OF TURBINES manufactured to customers specific requirements are shown below.

stainless steel open cross-flow turbine

Above is a stainless steel open cross-flow turbine for a wave energy system operating on seawater.

demonstration model of a ‘Darrius’ turbine

Above is a working demonstration model of a 'Darrius' turbine built for a developer.

 

Rupert Armstrong Evans

Managing Director