Cooled exhaust hood plates for reduced exhaust loss

摘要

Cooled exhaust hood plates 200 are provided in areas of high velocity steam flow within an exhaust steam flow 35 of an exhaust hood 105 a steam turbine 10. Coolant is directed within internal channels 215 within double walled exhaust hood plates 205 to cool plate surfaces 260 adjacent to the high velocity exhaust steam flow 150. The cooled exhaust hood plates 200 cool and condense the exhaust steam flow 35 in proximity. Condensation will occur in low velocity area near the cooled exhaust hood plate 200 to reduce the boundary layer and improve the flow through the hood, improving overall turbine performance.