Raising Efficiency of Decrepit Power Stations Will Decrease Feedstock Use

Replacing old simple-cycle power stations with combined-cycle facilities will double the units’ efficiency by at least 25%, director for technical support at the Thermal Power Plants Holding Company said.
"Dilapidated power stations use 3 billion cubic meters of natural gas and 500 million liters of diesel annually and raising their efficiency will reduce their feedstock considerably," Gholamreza Mehrdad was also quoted as saying by Barq News website. 
In view of the current global gas and diesel prices ($4 per cubic meters and $1.5 per liter respectively), the renovation of old plants can help generate at least $500 million in revenues per year.
“About 15% of Iran’s electricity are generated by decrepit power plants built more than 30 years ago,” he added.