Turbine revision returned the guaranteed efficiency values – Case Jyväskylän Voima, Finland
The operating hour-based annual maintenance took a surprising turn at Keljonlahti power plant when major damage requiring major repairs was discovered in the turbine rotors. The ten-week project extended to nearly seven months, but in the end, the machine was started precisely on the agreed date, and the total expansion efficiency of the turbine increased by more than 4%.