COMPACT HYDRO TURBINE RANGE

Gilbert Gilkes & Gordon Ltd (Gilkes) is an internationally established manufacturing company, based in Kendal, UK on the edge of the English Lake District.

In 1856, Gilkes installed their first hydroelectric scheme. Over 150 years later, we are still a world leader in small hydropower systems supplying over 6500 turbines to over 80 countries during its history. With thousands of installations around the world, Gilkes continue to demonstrate the ability to be sensitive to regional differences and requirements and continually design, manufacture and install bespoke engineered solutions for their customers.

The company’s head office is in Kendal, however other operations include a dedicated hydro service unit in Fort William & Inverness, Scotland and offices in Vancouver and Tokyo for the North American and Far East markets.

COMPACT TURBINE RANGEMade up of both Pelton and Turgo turbines the Gilkes compact range has been specifically designed and engi-neered for the sub 100kW market. Our simple case design coupled with precision engineered runners and spear valves have produced a range of cost effective, highly reliable turbines suitable for a wide hydraulic duty.

As a keystone component in any hydro scheme, it is essential that the turbine is well maintained and protected from damage. All of our compact turbines are fitted with a failsafe to close deflector that will engage the jet in the event of load rejection preventing the turbine going into a condition known as overspeed.

Gilkes Pelton TurbinePelton turbines are medium to high head free jet impulse turbines. As an impulse turbine, the Pelton Turbine maintains high efficiency over a wide flow range. The jet strikes the splitter edge of the double bucket and is turned through an angle of nearly 180° before falling under gravity into the discharge channel or tailrace.

Gilkes Turgo Impulse TurbineOriginally designed and invented by Gilkes in 1919 the Turgo provides a simple and robust impulse turbine to operate on medium heads. The design allows a large jet of water to be directed towards the Turgo Runner at a high velocity.

The Turgo Runner extracts the energy from the water flow and im-parts this energy to the turbine shaft. This mechanical power is then transferred into electric energy using a generator. This electric energy is then suitable to export to the national grid or to consume locally.

With its ability to maintain a high efficiency over a wide flow range make the Turgo turbine an ideal solution for a run-of-river scheme.

0 50 100 150 200 250Discharge [l/s]

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50

100

150

200

250

Net

head

[m]

30 kW40 kW

60 kW

80 kW100 kW

ABC Compact Range Chart

400 mm1500 rpm

400 mm1000 rpm

450 mm1000 rpm

500 mm1000rpm

350 mm1500 rpm

13½ inch 1000rpm

12 inch1000 rpm

12 inch1500 rpm

10½ inch1000 rpm

10½ inch1500 rpm

9 inch1500 rpm

7½ inchBelt drive

Gilkes Compact Turbine Control SystemUtilising our in house developed turbine controller, the Gilkes Compact Turbine control system provides a fully automatic control system. Capable of controlling both grid connected and islanded installations with either induction or synchronous generators. As standard, the compact control system includes:• Head level control• 6” Touch screen HMI• Bearing temperature monitoring (Turbine and

Generator)• G59/G83 protection relay• Power factor correctionAdditional options available are: • 10” Touch screen HMI• Remote monitoring• Text message alerts

The water turbine is the key to any hydro project and requires correct interfacing with the electrical, mechanical, hydraulic and civil aspects of the project.

Gilkes has built on its experience over literally thousands of projects, this allows us to offer a truly integrated package of equipment. The optimum turbine selection for a given hydraulic duty and site application is dependent on many parameters, however the chart below provides a quick guide to the operating range of the main turbine types.

Gilbert Gilkes & Gordon LtdCanal Head North, Kendal Cumbria LA9 7BZ.Registration number 173768 London. Telephone: +44 1539 720028Fax: +44 1539 732110Email: hydro@gilkes.comwww.gilkes.com

COMPACT HYDRO TURBINE RANGE

What is a Mini Grid?

A mini grid is a localised power generation and distribution network, independent to a national grid. Typically, mini grids are developed to provide power for remote and rural communities that do not have access to a national grid. They can also be used to provide reliable power in locations where the national grid is unstable.

Mini grid systems provide communities with the opportunity to take ownership of the natural resources they have available to them, reducing their dependency on burning fossil fuels for electricity.

Run-of-river Hydro in a Mini Grid

The inclusion of small hydro within a mini grid has many advantages:

• Free fuel source

• Low environmental impact

• Mature and proven technology

• Long equipment life span (50 years+)

• Reliable source of ‘mains’ quality electricity

• Low maintenance

• Robust control systems requiring minimal operator interaction

Gilkes Mini Grid Systems

Gilkes design, manufacture, install and commission turnkey hydropower systems from 50kW up to 20MW. Our systems are designed to individual customer requirements, which enable us to provide the best solution possible.

Gilkes have considerable, worldwide experience of supplying turbines for mini grid networks, which has led to the development of systems that can:

• Integrate into new or existing networks

• Operate both islanded and grid connected

• Provide provision for future connection to national grids

• Have black start capability

• Respond rapidly to change in load demand

• Generate in parallel with other generators in the same network

MINI GRIDS FOR RURAL ELECTRIFICATION

Gilbert Gilkes & Gordon Ltd, Canal Head North, Kendal, Cumbria LA9 7BZ Registration No.173768 England and Wales Tel: +44 (0)1539 720028 Email: hydro@gilkes.com

www.gilkes.com

CASE STUDYLONG BANGA, MALAYSIA

CASE STUDYIMENTI TEA FACTORY, KENYA

CASE STUDYGRYTVIKEN, SOUTH GEORGIA

The small village of Long Banga is located in Sarawak, Malaysia close to the border with Kalimantan.

Such is its remoteness that mains electricity supply is not practical. Residents generated electricity

using small diesel generators run when required but the supply was not constant or reliable and relied

on fuel that was transported over long distances. Long Banga was identified as an ideal location to

install a Mini Hydro scheme to provide 24 hour electricity for residents. A second phase development

is currently under construction to meet growing demand.

The Imenti Tea estate is a cooperative enterprise managed by KTDA. The Imenti Tea factory was connected to the Kenya national grid, but the supply was unstable and very prone to “brown outs” due to being on the end of a long transmission line. At these times, when the grid voltage was low, the factory had to disconnect from the grid and run on its diesel generators to avoid damage to machinery. A Gilkes Hydro scheme was installed in 2008 and the estate now has a healthy, reliable source of power.

KEY STATISTICS

Turbine Type: 2 x 12” Twin Jet TurgosPower: 320 kWNet Head: 148mFlow: 145 l/s

South Georgia is located in the middle of the South Atlantic some 1400 kilometres from the Falkland

Islands. The island is the home of the Applied Fisheries Research Station, staffed by scientists from

the British Antarctic Survey and the Museum of South Georgia. The station was powered by hydro-

power up until the time it fell into disuse in the 1960s. In 2006 it ws decided that a new hydroelectric

generation system would be installed to provide renewable electricity for the whole island.

KEY STATISTICS

Turbine Type: 475mm Francis Power: 920kWNet Head: 65mFlow: 1600 l/s

KEY STATISTICS

Turbine Type: 13.5” Twin Jet Turgo Power: 250 kWNet Head: 65mFlow: 472 l/s