Elements and Performance Criteria
- Evaluate energy balance of steam turbine plant
- Explain construction and operation of feed system
- Operation and components of the complete feed system are outlined
- Construction, operating principles and maintenance requirements of a regenerative condenser are explained
- Causes of loss of vacuum are identified
- Construction and operation of air ejectors, vacuums and extraction pumps are explained
- Construction and operation of gland condensers, low-pressure heaters, drain coolers and high-pressure heaters are explained
- General arrangement and construction of turbo-feed pumps is outlined
- Governor control is explained
- Operating principles and construction details of de-aerators are explained
- Explain construction, operation and repair of high-pressure water tube boilers
- Operating principles of high-pressure boilers, including water and gas flow circulation are explained
- Drum, internal fittings and support and expansion arrangements are outlined
- Procedures for repairing a membrane wall furnace are clarified
- Operating principles and construction methods of integral and external superheaters are explained
- Construction and operation of economisers and air heaters is explained
- Chemistry of combustion is explained
- Typical burner register arrangements are outlined
- Construction, operation and maintenance of boiler gauge glasses and safety valves is explained
- Operation of boiler control and soot blowing system is detailed
- Blow-down procedure for a high pressure boiler is prepared
- Explain requirements for feed water treatment for high-pressure water tube boilers
- How salts are precipitated and how metal is corroded in the boiler and feed system is explained and method of prevention is outlined
- How oxygen is eliminated in high-pressure boilers is shown
- How pH is measured and controlled is explained
- Normal and maximum operating limits for boiler feed water treatment are identified and procedure to follow if these limits are exceeded is clarified
- Purpose and procedure for different types of tests of boiler water chemistry are explained
- Explain construction and operation of high-pressure turbines
- Flow of steam through nozzles is analysed, and pressure and velocity compounding are illustrated
- Construction of blades, bearings, glands, rotors and casings is explained
- Warming-through procedure prior to start up is explained
- Routine checks during operation are detailed
- Emergency operation of plant with one turbine inoperative is outlined
- Turbine shutdown procedure is clarified
- Routine checks carried out at a turbine plant survey are detailed
- Precautions necessary when turbine and gearing casings are open are explained and any repairs or adjustments that may be required are identified
- Performance of steam plant by routine observations of pressure temperature speed and vibration of turbine, gearing and associated systems is analysed
- Explain turbine gearing arrangements
- Single and double reduction gearing systems are outlined
- Use of double helical involute gear teeth is explained
- Advantages and disadvantages of single and double locked tandem gearboxes are detailed
- Purpose of fitting a nodal drive in gearing system is clarified
- Construction and reason for installing flexible couplings in gearing system is explained
- Layout of a turbo-electric drive is detailed
- Analyse flow of air and gas through a simple cycle marine gas turbine