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Evidence Guide: MARL029 - Demonstrate intermediate knowledge of marine steam turbines and main boilers

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MARL029 - Demonstrate intermediate knowledge of marine steam turbines and main boilers

What evidence can you provide to prove your understanding of each of the following citeria?

Evaluate energy balance of steam turbine plant

  1. Heat losses in a turbine and turbine system are analysed
  2. An enthalpy/entropy diagram is used to show how steam properties change through a turbine
  3. The affect air heaters and economisers have on turbine plant efficiency is explained
  4. Practical methods of verifying energy losses are detailed
Heat losses in a turbine and turbine system are analysed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

An enthalpy/entropy diagram is used to show how steam properties change through a turbine

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

The affect air heaters and economisers have on turbine plant efficiency is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Practical methods of verifying energy losses are detailed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Explain construction and operation of feed system

  1. Operation and components of the complete feed system are outlined
  2. Construction, operating principles and maintenance requirements of a regenerative condenser are explained
  3. Causes of loss of vacuum are identified
  4. Construction and operation of air ejectors, vacuums and extraction pumps are explained
  5. Construction and operation of gland condensers, low-pressure heaters, drain coolers and high-pressure heaters are explained
  6. General arrangement and construction of turbo-feed pumps is outlined
  7. Governor control is explained
  8. Operating principles and construction details of de-aerators are explained
Operation and components of the complete feed system are outlined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Construction, operating principles and maintenance requirements of a regenerative condenser are explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Causes of loss of vacuum are identified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Construction and operation of air ejectors, vacuums and extraction pumps are explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Construction and operation of gland condensers, low-pressure heaters, drain coolers and high-pressure heaters are explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

General arrangement and construction of turbo-feed pumps is outlined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Governor control is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Operating principles and construction details of de-aerators are explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Explain construction, operation and repair of high-pressure water tube boilers

  1. Operating principles of high-pressure boilers, including water and gas flow circulation are explained
  2. Drum, internal fittings and support and expansion arrangements are outlined
  3. Procedures for repairing a membrane wall furnace are clarified
  4. Operating principles and construction methods of integral and external superheaters are explained
  5. Construction and operation of economisers and air heaters is explained
  6. Chemistry of combustion is explained
  7. Typical burner register arrangements are outlined
  8. Construction, operation and maintenance of boiler gauge glasses and safety valves is explained
  9. Operation of boiler control and soot blowing system is detailed
  10. Blow-down procedure for a high pressure boiler is prepared
Operating principles of high-pressure boilers, including water and gas flow circulation are explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Drum, internal fittings and support and expansion arrangements are outlined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Procedures for repairing a membrane wall furnace are clarified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Operating principles and construction methods of integral and external superheaters are explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Construction and operation of economisers and air heaters is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Chemistry of combustion is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Typical burner register arrangements are outlined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Construction, operation and maintenance of boiler gauge glasses and safety valves is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Operation of boiler control and soot blowing system is detailed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Blow-down procedure for a high pressure boiler is prepared

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Explain requirements for feed water treatment for high-pressure water tube boilers

  1. How salts are precipitated and how metal is corroded in the boiler and feed system is explained and method of prevention is outlined
  2. How oxygen is eliminated in high-pressure boilers is shown
  3. How pH is measured and controlled is explained
  4. Normal and maximum operating limits for boiler feed water treatment are identified and procedure to follow if these limits are exceeded is clarified
  5. Purpose and procedure for different types of tests of boiler water chemistry are explained
How salts are precipitated and how metal is corroded in the boiler and feed system is explained and method of prevention is outlined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

How oxygen is eliminated in high-pressure boilers is shown

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

How pH is measured and controlled is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Normal and maximum operating limits for boiler feed water treatment are identified and procedure to follow if these limits are exceeded is clarified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Purpose and procedure for different types of tests of boiler water chemistry are explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Explain construction and operation of high-pressure turbines

  1. Flow of steam through nozzles is analysed, and pressure and velocity compounding are illustrated
  2. Construction of blades, bearings, glands, rotors and casings is explained
  3. Warming-through procedure prior to start up is explained
  4. Routine checks during operation are detailed
  5. Emergency operation of plant with one turbine inoperative is outlined
  6. Turbine shutdown procedure is clarified
  7. Routine checks carried out at a turbine plant survey are detailed
  8. Precautions necessary when turbine and gearing casings are open are explained and any repairs or adjustments that may be required are identified
  9. Performance of steam plant by routine observations of pressure temperature speed and vibration of turbine, gearing and associated systems is analysed
Flow of steam through nozzles is analysed, and pressure and velocity compounding are illustrated

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Construction of blades, bearings, glands, rotors and casings is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Warming-through procedure prior to start up is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Routine checks during operation are detailed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Emergency operation of plant with one turbine inoperative is outlined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Turbine shutdown procedure is clarified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Routine checks carried out at a turbine plant survey are detailed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Precautions necessary when turbine and gearing casings are open are explained and any repairs or adjustments that may be required are identified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Performance of steam plant by routine observations of pressure temperature speed and vibration of turbine, gearing and associated systems is analysed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Explain turbine gearing arrangements

  1. Single and double reduction gearing systems are outlined
  2. Use of double helical involute gear teeth is explained
  3. Advantages and disadvantages of single and double locked tandem gearboxes are detailed
  4. Purpose of fitting a nodal drive in gearing system is clarified
  5. Construction and reason for installing flexible couplings in gearing system is explained
  6. Layout of a turbo-electric drive is detailed
Single and double reduction gearing systems are outlined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Use of double helical involute gear teeth is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Advantages and disadvantages of single and double locked tandem gearboxes are detailed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Purpose of fitting a nodal drive in gearing system is clarified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Construction and reason for installing flexible couplings in gearing system is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Layout of a turbo-electric drive is detailed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Analyse flow of air and gas through a simple cycle marine gas turbine

  1. Construction of compressor, combustion system and single and two shaft turbines is explained
  2. Necessary controls required for control and protection of plant are confirmed
  3. Accessories necessary for safe operation of simple cycle marine gas turbines are listed
Construction of compressor, combustion system and single and two shaft turbines is explained

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Necessary controls required for control and protection of plant are confirmed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Accessories necessary for safe operation of simple cycle marine gas turbines are listed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Evaluate energy balance of steam turbine plant

1.1

Heat losses in a turbine and turbine system are analysed

1.2

An enthalpy/entropy diagram is used to show how steam properties change through a turbine

1.3

The affect air heaters and economisers have on turbine plant efficiency is explained

1.4

Practical methods of verifying energy losses are detailed

2

Explain construction and operation of feed system

2.1

Operation and components of the complete feed system are outlined

2.2

Construction, operating principles and maintenance requirements of a regenerative condenser are explained

2.3

Causes of loss of vacuum are identified

2.4

Construction and operation of air ejectors, vacuums and extraction pumps are explained

2.5

Construction and operation of gland condensers, low-pressure heaters, drain coolers and high-pressure heaters are explained

2.6

General arrangement and construction of turbo-feed pumps is outlined

2.7

Governor control is explained

2.8

Operating principles and construction details of de-aerators are explained

3

Explain construction, operation and repair of high-pressure water tube boilers

3.1

Operating principles of high-pressure boilers, including water and gas flow circulation are explained

3.2

Drum, internal fittings and support and expansion arrangements are outlined

3.3

Procedures for repairing a membrane wall furnace are clarified

3.4

Operating principles and construction methods of integral and external superheaters are explained

3.5

Construction and operation of economisers and air heaters is explained

3.6

Chemistry of combustion is explained

3.7

Typical burner register arrangements are outlined

3.8

Construction, operation and maintenance of boiler gauge glasses and safety valves is explained

3.9

Operation of boiler control and soot blowing system is detailed

3.10

Blow-down procedure for a high pressure boiler is prepared

4

Explain requirements for feed water treatment for high-pressure water tube boilers

4.1

How salts are precipitated and how metal is corroded in the boiler and feed system is explained and method of prevention is outlined

4.2

How oxygen is eliminated in high-pressure boilers is shown

4.3

How pH is measured and controlled is explained

4.4

Normal and maximum operating limits for boiler feed water treatment are identified and procedure to follow if these limits are exceeded is clarified

4.5

Purpose and procedure for different types of tests of boiler water chemistry are explained

5

Explain construction and operation of high-pressure turbines

5.1

Flow of steam through nozzles is analysed, and pressure and velocity compounding are illustrated

5.2

Construction of blades, bearings, glands, rotors and casings is explained

5.3

Warming-through procedure prior to start up is explained

5.4

Routine checks during operation are detailed

5.5

Emergency operation of plant with one turbine inoperative is outlined

5.6

Turbine shutdown procedure is clarified

5.7

Routine checks carried out at a turbine plant survey are detailed

5.8

Precautions necessary when turbine and gearing casings are open are explained and any repairs or adjustments that may be required are identified

5.9

Performance of steam plant by routine observations of pressure temperature speed and vibration of turbine, gearing and associated systems is analysed

6

Explain turbine gearing arrangements

6.1

Single and double reduction gearing systems are outlined

6.2

Use of double helical involute gear teeth is explained

6.3

Advantages and disadvantages of single and double locked tandem gearboxes are detailed

6.4

Purpose of fitting a nodal drive in gearing system is clarified

6.5

Construction and reason for installing flexible couplings in gearing system is explained

6.6

Layout of a turbo-electric drive is detailed

7

Analyse flow of air and gas through a simple cycle marine gas turbine

7.1

Construction of compressor, combustion system and single and two shaft turbines is explained

7.2

Necessary controls required for control and protection of plant are confirmed

7.3

Accessories necessary for safe operation of simple cycle marine gas turbines are listed

Required Skills and Knowledge

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Evaluate energy balance of steam turbine plant

1.1

Heat losses in a turbine and turbine system are analysed

1.2

An enthalpy/entropy diagram is used to show how steam properties change through a turbine

1.3

The affect air heaters and economisers have on turbine plant efficiency is explained

1.4

Practical methods of verifying energy losses are detailed

2

Explain construction and operation of feed system

2.1

Operation and components of the complete feed system are outlined

2.2

Construction, operating principles and maintenance requirements of a regenerative condenser are explained

2.3

Causes of loss of vacuum are identified

2.4

Construction and operation of air ejectors, vacuums and extraction pumps are explained

2.5

Construction and operation of gland condensers, low-pressure heaters, drain coolers and high-pressure heaters are explained

2.6

General arrangement and construction of turbo-feed pumps is outlined

2.7

Governor control is explained

2.8

Operating principles and construction details of de-aerators are explained

3

Explain construction, operation and repair of high-pressure water tube boilers

3.1

Operating principles of high-pressure boilers, including water and gas flow circulation are explained

3.2

Drum, internal fittings and support and expansion arrangements are outlined

3.3

Procedures for repairing a membrane wall furnace are clarified

3.4

Operating principles and construction methods of integral and external superheaters are explained

3.5

Construction and operation of economisers and air heaters is explained

3.6

Chemistry of combustion is explained

3.7

Typical burner register arrangements are outlined

3.8

Construction, operation and maintenance of boiler gauge glasses and safety valves is explained

3.9

Operation of boiler control and soot blowing system is detailed

3.10

Blow-down procedure for a high pressure boiler is prepared

4

Explain requirements for feed water treatment for high-pressure water tube boilers

4.1

How salts are precipitated and how metal is corroded in the boiler and feed system is explained and method of prevention is outlined

4.2

How oxygen is eliminated in high-pressure boilers is shown

4.3

How pH is measured and controlled is explained

4.4

Normal and maximum operating limits for boiler feed water treatment are identified and procedure to follow if these limits are exceeded is clarified

4.5

Purpose and procedure for different types of tests of boiler water chemistry are explained

5

Explain construction and operation of high-pressure turbines

5.1

Flow of steam through nozzles is analysed, and pressure and velocity compounding are illustrated

5.2

Construction of blades, bearings, glands, rotors and casings is explained

5.3

Warming-through procedure prior to start up is explained

5.4

Routine checks during operation are detailed

5.5

Emergency operation of plant with one turbine inoperative is outlined

5.6

Turbine shutdown procedure is clarified

5.7

Routine checks carried out at a turbine plant survey are detailed

5.8

Precautions necessary when turbine and gearing casings are open are explained and any repairs or adjustments that may be required are identified

5.9

Performance of steam plant by routine observations of pressure temperature speed and vibration of turbine, gearing and associated systems is analysed

6

Explain turbine gearing arrangements

6.1

Single and double reduction gearing systems are outlined

6.2

Use of double helical involute gear teeth is explained

6.3

Advantages and disadvantages of single and double locked tandem gearboxes are detailed

6.4

Purpose of fitting a nodal drive in gearing system is clarified

6.5

Construction and reason for installing flexible couplings in gearing system is explained

6.6

Layout of a turbo-electric drive is detailed

7

Analyse flow of air and gas through a simple cycle marine gas turbine

7.1

Construction of compressor, combustion system and single and two shaft turbines is explained

7.2

Necessary controls required for control and protection of plant are confirmed

7.3

Accessories necessary for safe operation of simple cycle marine gas turbines are listed

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include:

accessing diagnostic information related to marine steam turbines

applying relevant work health and safety/occupational health and safety (WHS/OHS) requirements and work practices

assessing own work outcomes and maintaining knowledge of current codes, standards, regulations and industry practices

identifying and applying relevant solutions to problems that can occur during operation of steam propulsion plant and associated systems on a steam vessel

identifying and interpreting diagnostic information, and perform mathematical calculations related to operating, maintaining and repairing marine steam turbines

identifying methods, procedures and materials needed for operating, maintaining and repairing marine steam turbines

imparting knowledge and ideas through verbal, written and visual means

reading and interpreting manuals, technical specifications, safety data sheets/material safety data sheets and manufacturer guides related to operating, maintaining and repairing marine steam turbines.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

basic principles of operation of main steam propulsion and auxiliary systems on a steam vessel, including:

methods of turbine control, including safety devices

symptoms, causes and effects of defects of auxiliary steam turbines and actions to be taken

construction and operation of main and auxiliary steam turbines

procedures for emergency operation of a steam turbine

construction and operation of feed system

construction and operation of high-pressure turbines

construction, operation and repair of high-pressure water tube boilers

energy balance for a steam turbine plant

established engineering practice and procedures for operation of shipboard steam propulsion plant and associated systems in warm-through, manoeuvring, start up, normal running, emergency and shut down situations

fundamental principles of steam propulsion systems and boilers

hazards and problems that can occur during operation of steam propulsion plant and associated systems, and appropriate preventative and remedial action

methods of lubricating principal components of a marine steam propulsion turbine and its associated gearing, and evaluating common faults, including common lubrication faults, symptoms, causes, and actions to be taken with such faults

operational characteristics and performance specifications for different types of steam propulsion plant and associated systems on a steam vessel of unlimited propulsion power

procedures for reading and interpreting readings and indications of performance of steam propulsion plant and associated systems

requirements for feed water treatment for high-pressure water tube boilers

simple cycle marine gas turbine

turbine gearing arrangements

types, properties, tests, applications and treatment of fuels, lubricants and solvents/chemicals used on board a steam vessel, including working principles, construction, maintenance and safe operation of centrifuges, filters, and other treatment devices

typical operating precautions for steam propulsion plant and associated systems to ensure operational performance complies with bridge orders, technical specifications, survey requirements, and established safety and anti-pollution rules and regulations

units of measurement

WHS/OHS legislation and policies.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Accessories must include:

accessory gear

lube oil:

coolers

filters

pumps

starting devices