(EnergyAsia, November 3 2011, Thursday) — Huaneng Power International Inc (HPI) said its application to build two 600MW domestic supercritical coal-fired air-cooling generation units at its 80%-owned Zuoquan power plant in Shanxi province has been approved by the National Development and Reform Commission (NDRC).As part of its RMB5.09 billion investment, the company will install electrostatic…