Over 200 power plants are currently being planned or built throughout Europe with a nominal electrical output of 300 to 1100 MW. Numerous coal-fired, supercritical new plants are increasingly toning their attention to a heat exchanger technology that offers convincing technical and economic advantages over conventional U-type feedwater heaters: the header-type feedwater heater, also called SNAKE heater or header-type heater. Three header-type heaters and a separate desuperheater normally form a complete high-pressure heater train. They are usually installed upright, seldom horizontally, and normally have 3 or 4 water passes depending on the piping system. The world's biggest header-type heaters weigh more than 270 tons when empty and are used in both 1100 MW units F and G of the lignite-fired power plant in Neurath (BoA 2 and 3).
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