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.
us installed wind turbine capacity was 11575 mw at end 2006 and 16907 mw at end 2007 for an increase of 5332 mw at a capital cost of about $ 9598 million i e the transmission cost adder is about 1902 9598 19 8 %arious big wind promoters maintain the cost of wind energy is competitive with other sources of energy as shown below this is hardly the case they often point to power purchase agreements ppas between wind turbine owners and utilities to sell at 5 to 6 c kwh as proof of market price parity