Kijito 2008 Windpump

Target SDGs

Market Suggested Retail Price

$2,790.00

Target Users (Target Impact Group)

Community

Distributors / Implementing Organizations

This product has been implemented by Bob Harries Engineering Ltd (BHEL).

Competitive Landscape

Direct competitors include IZ Southern Cross Windmill.

Countries

Kenya, Tanzania

Manufacturing/Building Method

This product is produced in Thika, Kenya by BHEL.

BHEL have staff of 20 skilled personnel, who manufacture the entire range of windpumps and pump cylinders. Apart from the imported ball bearings, the entire Kijito Windpump range is manufactured using local components at the BHEL workshop.

Intellectural Property Type

Trademark

User Provision Model

The product can be ordered directly by contacting BHEL.

Distributions to Date Status

By 2002, approximately 300 windpumps were constructed. An exact number of distributions to date is unknown, however, Kijito design and currently produce about 25 windpumps a year with a capacity to produce up to 50 machines as of 2008.

Design Specifications

The Kijito 2008 windpump transmits power from the eccentrically placed rotor to the pump through a rocker to the pumprods. All rotating components run on ball and roller bearings, which require lubrication twice a year using a vehicle grease gun. The Kijito 2008 model specifications follow:
Rotor Diameter: 8 ft (2.4 m) with 12 blades. The models range between 8 – 26 ft (2.44 - 7.93 m) of rotor diameters.
Tower: Steel tubular mast with steel rod guides hinged at the tower base. Kijitos are normally supplied on 30 ft (9 m) tripod towers. However extension sections are available as options to increase the rotor height and get better performance. All towers are hinged at their bases to allow easy erection and servicing. This also greatly facilitates access to the borehole when the wind pump is lowered, and reduces borehole and pump maintenance time and costs.
Tail: Hinged side vane attached to the transmission via a steel boom providing automatic over speed control by means of yawing activated by the eccentrically placed rotor and hinged vane.
Furling: Done by hand with a stop rod on the transmission.
Weight: Rotor 50 lbs (22.7 kgs), Transmission 104 lbs (47 kgs), Tower 198 lbs (90 kgs).

Product Schematics

Technical Support

The system can be installed by the customer, using instructions provided, and is transportable in most 1 tonne pick-ups. Alternatively, a foreman can be provided by BHEL to oversee the installation assuming housing is provided.

Replacement Components

The rotor blades can be individually replaced, if damaged for any reason.

Lifecycle

The product can function for ~20 years, with proper operations and maintenance, which can be challenging.

Manufacturer Specified Performance Parameters

The pumping yield depend on wind conditions. The manufacturer specifies a 20 ft (6 m) rotor can provide 78.47 L/min at 20 m fat 4-6 m/s wind speed.

Vetted Performance Status

Performance testing has been conducted by the Intermediate Technology Development Group –ITDG (now Practical Action) determining wind pump performance.

Safety

No hazards listed by designer.

Complementary Technical Systems

The product can include a 10 ft (3 m) tower extension.

Academic Research and References

Compliance with regulations

Unknown

Evaluation methods

Field tests and implementation studies have been conducted by BHEL and are documented as case studies. Feasibility studies (primarily economic) have been conducted by UNIDO.

Feasibility studies (primarily economic) have been conducted by UNIDO.

Other Information

None