GEOTHERMAL PLANTS

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Olkaria I Power Station

Olkaria I Power Station was the first geothermal power plant in Africa. The 45 MW plant was commissioned in three phases and has three units each generating 15MW of electricity. The first unit was commissioned in June 1981, the second and third units in November 1982 and March 1985, respectively. The second phase of Olkaria I was commissioned in 2010 . The plant has had an average availability factor of over 95 per cent from commissioning. The power generated is connected to the national grid via a 132KV-transmission line.<

Olkaria II Power Station

Olkaria II Power Station is one of Africa’s largest Geothermal Power Station. It generates 70MW and is the second geothermal plant owned and operated by KenGen.

The second phase of Olkaria || was commissioned in 2010 injecting an extra 35 MW of power making a total of 150MW of power produced through geothermal means.

The Power Station is located in the North Eastern sector of the greater Olkaria geothermal field. Wells were drilled between 1986 and 1993 but construction of the power plant was delayed until the year 2000 when funds became available. The project was co-financed by the World Bank, the European Investment Bank, KfW of Germany and KenGen. Designed and constructed with an advantage of newer technology, this state-of-the-art plant is highly efficient in steam utilization. It works on single flash plant cycle with a steam consumption of 7.5 t/h/MW. The turbines are single flow six stage condensing with direct contact spray jet condenser.

The power generated is transmitted to the national grid via 220 kv double circuit line

Olkaria IV Power Station

The 280 megawatts plant is the single largest geothermal plant in the world from a single site. The plants comprise two units- the 140-megawatt Olkaria I additional units 4& 5 and 140-megawatt Olkaria IV units 1 and 2. The two plant were commissioned in February 2015 and October 2014 respectively.

The 140MW Olkaria 1 additional Unit 5, the last phase of the single largest geothermal project in Africa was commissioned in December 2014 following successful reliability tests. The plant is now adding 140 MW to the national grid.

Geothermal Well head Units

The KenGen innovation ensures early development pending construction of the huge power plants. The company has so far implemented a total of 10 well head generation units with a total capacity of 56.1MW.

The wells were drilled between 1986 and 1993 . Construction of the power plant was started in 2000 when funds became available.