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Kriel Power Station

Location:  Between the towns of Kriel and Ogies in Mpumalanga

Employees: Approximately 960

Technical details: 

  • Six 500MW units 

  • Installed capacity: 3 000MW 

  • 2001 capacity: 2 850MW 

  • Design efficiency at rated turbine MCR (%): 36.90% 

  • Ramp rate: 45.45% per hour 

  • Average availability over last 3 years: 93.37% 

  • Average production over last 3 years: 17 452GWh

History: When Kriel was completed in 1979 it was the largest coal-fired power station in the Southern Hemisphere. It was also one of the first stations to be supplied with coal from a fully mechanised coal mine. The station is 26 years old this year.

General: Kriel is unique in that each turbine generator set is separate, whereas in Eskom's other stations, all the turbines are housed in a single turbine hall, all placed along the same axis.

The station's operating regime comprises five shifts of three in 24 hours.

Contact details:

  • Switchboard Tel: (017) 615-2000

  • Power Station Manager:  Jabulane Mavimbela

Technical Data:

Fuel 

Mining Company
AMCOAL

Calorific value (underground coal)

23,4 MJ\kg (dry basis)

(opencast coal) 

18,2 - 20,4 MJ\kg (dry basis)

Ash content (underground coal)

23,4% (dry basis)

(opencast coal) 

: 32% (dry basis) 

Sulphur content (underground coal)

: 1% (dry basis)

(opencast coal)

: 1% (dry basis) 

Coal consumed at full load 

: 1400 tons\h

Total annual consumption 

: 8 - 9 million tons 

Coal staithe capacity

120 620 tons

Staithe 1

72 000 tons

Staithe 2

48 620 tons

Stockpile capacity

1,7 million tons 

Boiler bunker capacity

19 900 tons per unit

Fuel oil

LO 5

Storage capacity

2000 tons

Annual consumption (total)

: 4000 kl

Annual consumption per unit

: 750 kl

Mills 

  • Manufacturer: BABCOCK & WILCOX (SA) 

  • Type: Medium speed, vertical spindle 

  • Number: 6 per unit

Turbines 

  • Manufacturer: Brown Boveri \ CEM 

  • Type: Multi cylinder impulse reaction 

  • Rating (generator output) 550 MVA 

  • Speed 3000 r\min 

  • Total work rate of turbine train 513,1 MW 

  • Total efficiency 98,15%

Boilers 

  • Manufacturer Steinmuller (Africa) Pty Ltd. 

  • Type Benson 

  • Number 6 

  • Maximum continuous rating 440 kg\s

Generators 

  • Manufacturer CEM\BBC 

  • Rated capacity 555 MVA 

  • Total efficiency of generators 98,15%