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FOSSIL FUEL POWER PLANT SOLUTIONS

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 FEEDWATER SYSTEMS

  • Pipeline, valve and pump sizing.
  • Cavitation, flashing and condensing detection.
  • Pump performance and NPSH.
  • Feedwater heater performance and tube leaks.
  • Flash tank behavior.

STEAM TURBINE & SUPPORTING SYSTEMS

  • Start-up, shutdown and load following operation.
  • Turbine trip control.
  • Gland steam systems.
  • Lubrication systems.
  • Generator hydrogen and lubrication systems.
  • Assess cooling system and heat exchanger performance. 

COOLING WATER CIRCUITS

  • Pipeline, valve and pump sizing.
  • Water hammer.
  • Cooling tower response.
  • Heat exchanger sizing.
  • Water reticulation flow balancing & energy efficiency.

ASH SLURRY

  • Pump and pipe sizing.
  • Plant expansion.
  • Slurry settling and blockage.
SteamCycle network

BOILER STEAM SYSTEMS

  • Once-through and reheat boilers.
  • Temperature calculation and change rates.
  • Boiling stability & boiling regime examination.
  • Detection of boiling oscillations (Ledinegg, density wave, pressure drop-type)
  • Recirculation rate and steam production.
  • Natural circulation boiler.
  • Attemperation system.
  • Dry out prediction.
  • Load changes.

BOILER AUXILIARY SYSTEMS

Start-up fuel oil or gas systems.

  • Flow balancing in branching networks.
  • Pipe heat loss estimation.
  • Pump sizing and viscosity adjustment.
  • Control philosophy testing.
  • Pump/pipe/injector matching.

Draught group/Flue gas system: Calculation of ID or PA fan capacity margin as function of loss characteristics: Pulverisers, air heater seal leakage, flue gas ducts, precipitators, flow regulator vanes, flue gas desulphurization units (FGD). 

NATURAL CIRCULATION BOILER

  • Calculation of recirculation rate and steam production.
  • Prediction of dry out.

CONDENSERS

  • Air leak detection.
  • Condenser level following.
  • Wet and dry condenser heat exchange.

COMBINED CYCLE PLANT

  • High level analysis and design of the complete combined thermodynamic cycle.
  • Transient analysis of load change scenarios.
  • Cycle effiency analysis under different ambient conditions.
  • Root cause analysis for fault finding.

Combined cycle

 

Engineering productivity for the design and analysis of complex thermofluid systems such as those found in large coal fired power plants is vastly improved by modeling in Flownex®. In addition, the system knowledge and understanding gained by the modeler is invaluable in subsequent activities.

Gary de Klerk, Pr. Eng. - Chief Engineer, Plant engineer - Turbine Process Group Technology - ESKOM