Turbine Efficiency Part 2

Superheat and Reheat Attemperation Describe how turbine efficiency and heat rate are affected by the use of superheat attemperators. Describe how turbine efficiency and heat rate are affected by the use of reheat attemperators. Turbine Control Valves Describe how the positions of the turbine control valves affect turbine efficiency and heat rate. Describe how frictional losses in turbine control valves can be minimized by shifting load between different operating units. Describe how frictional losses in turbine control valves can be minimized by varying main steam pressure. Extraction Steam Flows Describe how heat rate is affected by changes in the flow of extraction steam to the feedwater heaters. Describe how heat rate is affected by changes in the flow of extraction steam to auxiliary systems.