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.
As a renewable resource, wind energy has no fuel cost, allowing electricity consumers and utilities to lock-in known electricity rates for 20 to 30 years through contracts called Power Purchase Agreements (PPAs). The Department of Energy finds that â Among a large sample of wind projects installed in 2012, the capacity-weighted average installed cost stood at nearly $1,940/kW, down almost $200/kW from the reported average cost in 2011 and down almost $300/kW from the reported average cost in both 2009 and 2010 .â [3].