Supercritical technology

摘要

Continuing efforts to increase efficiencies and reduce emissions from large thermal power plant have seen a corresponding trend to ever-higher steam conditions and advanced turbine technology. The oldest of all power generation technologies, the basic water/steam cycle has been in common use for over a century and is as old as the commercial production of electrical power itself. During the early 20th century power stations with coal-fired boilers were producing steam at sub-critical conditions with temperatures around 200℃ giving overall thermal efficiencies no greater than 12 per cent.