Cogeneration - Combined Cycles

Performances & Operation

E-learning This course can be adapted to virtual classroom mode

Who should attend?

  • This course deals with cogeneration units in existing plants or new projects.
Public :
  • Graduate engineers and technicians whose activities are related to the design and/or operation of these installations: engineers and technicians from engineering companies, technical and HSE support, operation team, personnel from insurance companies.

Level : Proficiency

Course Content


      • Operating principle and operating conditions of cogeneration and combined cycles - Typical schemes.
      • Main parts of the different cycles:
      • Boiler, steam turbine (back-pressure or condensation).
      • Gas turbine, waste heat recovery boiler.
      • Energy balance and energy performances of each elementary operation: compression, combustion and expansion.
      • Efficiency enhancement, heat recovery from exhaust gases (air preheater, waste heat recovery boiler).
      • Different operating modes (simple waste heat recovery, post-combustion, separate boiler) and performances.
      • Application: comparison of performance, mechanical and thermal energy split.

      • Boiler Feed Water (BFW) quality, description of the physical and chemical required treatments.
      • Description of conventional boilers and waste heat boilers: water circuit, steam circuit, fuel circuits.
      • Operating conditions - Fuel consumption per ton of steam, depending on boiler type and operating conditions.
      • Main process control loops: boiler feed water, pressure and steam temperature, combustion, flue gas circulation draft.
      • Combustion monitoring, analyzers, aim and meaning of each measured parameter. Safety equipment and sequences.

      • Steam as a heating medium and mechanical driving fluid.
      • Steam pressure level requirements, depending on the end-use. Steam network balancing.
      • Steam as a heating medium: conditions for its distribution and efficient utilization.
      • Steam turbines: operating principle, expansion work and efficiency, and produced energy.
      • Static expansion: expanded steam characteristics, steam de-superheating.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • describe the process conditions related to the combined production of thermal and mechanical energy,
  • assess and follow up on the performance of the different equipment of a cogeneration unit,
  • analyze the operating conditions of a cogeneration cycle.

Ways & Means

  • Several practical applications related to actual industrial cases.