Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. |
1 | Analyse methods of improving plant efficiency | 1.1 | Increase in Rankine efficiency of plant by increasing the pressure and temperature is analysed |
1.2 | How regenerative feed heating and steam reheating increases overall plant efficiency is shown on an enthalpy/entropy diagram |
1.3 | Efficiency calculations and performance evaluation for boilers, turbines, feed systems and total plant are performed |
2 | Analyse changes in feed system that occur during fluctuating loads | 2.1 | Changes that occur during fluctuating loads are identified, detailing how make up to system and dump from system are performed |
2.2 | Condenser level control methods, how condenser is supported and how expansion stresses are avoided are explained |
2.3 | Loss of efficiency when heat transfer rate is interrupted is explained |
2.4 | Test procedure to identify leaks in a condenser is created |
2.5 | Types, features, common defects and maintenance requirements of two-stage and super cavitating extraction pumps are compared and contrasted |
2.6 | Effects of air leaks in feed system and ineffective air removal in air ejector are explained |
2.7 | Operation of a vacuum pump for air removal from a condenser is explained |
2.8 | Operation of a turbo feed pump differential pressure governor taking into account constant pressure, increasing pressure and decreasing pressure differential governing is explained |
2.9 | Alarms, shutdowns, automatic cut-in arrangements and testing of over speed trips for a boiler feed pump are outlined |
3 | Analyse design and construction of high-pressure water tube boilers and ancillary equipment | 3.1 | Temperature load relationships and temperature control of superheater are analysed |
3.2 | Operation of superheater with parallel, contra and cross flow of gas/steam flow is predicted |
3.3 | Correct material for high temperature operation of superheater tubes and headers is identified |
3.4 | Tube fixing and support arrangements for superheater elements are explained |
3.5 | Burner tip design and operation for steam atomising oil burners are compared |
3.6 | Features of a three-element water level control system and relationship with burner management system are outlined |
3.7 | Operation of a combustion control system fitted with cross limits on air and fuel is explained |
4 | Analyse operation, maintenance and performance of high-pressure water tube boilers and ancillary equipment | 4.1 | Warm through procedure and checks to be carried out before connecting boiler to range are explained |
4.2 | How boiler is laid up for short and/or long periods is explained |
4.3 | Actions required after oil or salt water contamination are detailed |
4.4 | Chemical cleaning procedure to remove scale and oil deposits from internal surfaces of a boiler is explained |
4.5 | Tube failures are identified and suitable methods of repair are selected |
4.6 | Defects that can occur in economisers and how they can be repaired are listed |
4.7 | Maintenance inspection procedures to prevent superheater and economise fires are produced |
4.8 | Procedure to combat soot and steam/iron fires in generating banks, superheaters and economisers is outlined |
4.9 | Coordinate and congruent feed water treatment is illustrated on a caustic/phosphate graph |
4.10 | Different feedwater tests, procedure for each test and appropriate chemical treatments are explained |
4.11 | Program for an internal and external survey of a water tube boiler is compiled, defects that may be found and repair methods that will enable boiler to be returned to service are listed |
4.12 | Procedure for setting lift, adjusting blow-down of safety valves and carrying out an accumulation test on a boiler is outlined |
4.13 | Operation, desired temperature range and correct cleaning and maintenance requirements for tube and regenerative air heaters are detailed |
4.14 | Preparation and procedure for conducting hydraulic testing of a high pressure water tube boiler is explained |
5 | Analyse turbine operation, maintenance and performance | 5.1 | Relationship between sequential nozzle operation and bar lift in steam turbines is explained |
5.2 | Principle of operation of different trips and cut-outs is explained |
5.3 | Differentiation is made between resonance and critical speed, and their effect on the turbine operation is explained |
5.4 | Types of turbine vibration and where each type is found in a turbine is analysed |
5.5 | System torsional vibration and effect of operating at critical speeds and in-built design elements required to avoid critical speeds are explained |
5.6 | Back pressure and self-condensing turbo alternators are compared |
5.7 | Governor system is explained |
5.8 | Turbine control systems are explained |
5.9 | Procedure for opening up turbine for survey, routine checks of blades, casings, rotors, bearings, glands, drains and the reassembly of turbine is explained |
5.10 | Procedure for straightening a bowed turbine rotor is outlined |
6 | Evaluate turbine-gearing performance | 6.1 | Single and double reduction gearing systems are compared and contrasted |
6.2 | Features and applications of double helical involute gear teeth are outlined |
6.3 | Advantages and disadvantages of single and double locked train gearboxes are analysed |
6.4 | Construction and reason for installing flexible couplings in gearing system is explained |
6.5 | Features, functions and applications of star, planetary and solar epicyclic gearing are compared and contrasted |
6.6 | Space savings resulting from use of epicyclic gearing are analysed |