First opened in 1952, this airport has been renamed twice in the last couple of years; you may find that people and publications still refer to it by its previous names of Johannesburg International Airport or Jan Smuts. It is also known by the abbreviation ORTIA.
1 For example, the equipment cost for a 10 kW wind turbine costs roughly $40,000, while a 100-kW turbine can cost more than $350,000.2  According to Bergey.com, the average wind turbine can cost $48,000 to $65,000 to install. 3  The equipment costs alone will be around $40,000. For example, the equipment cost for a 10 kW wind turbine costs roughly $40,000, while a 100-kW turbine can cost more than $350,000.
Gas turbines are a mature and economically efficient technology with broad acceptance in the electricity market place. The installed capital cost of a gas turbine cogeneration system varies between $800-$1,800/kWh.This is due to large variations in turbine size from a few kW to many hundred of MW. The O&M costs range from $0.3c-$1.0 c/kWh.as turbines are currently the favoured prime mover in larger-scale cogeneration wherever natural gas is available at costs less than 3 to 4 times the equivalent energy cost of solid fuels.