Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

MARL059 Mapping and Delivery Guide
Demonstrate basic knowledge of marine steam turbines and main boilers

Version 1.0
Issue Date: May 2024


Qualification -
Unit of Competency MARL059 - Demonstrate basic knowledge of marine steam turbines and main boilers
Description
Employability Skills
Learning Outcomes and Application This unit involves the skills and knowledge required to operate and maintain main steam propulsion plant and associated control systems on a commercial vessel.This unit applies to people working in the maritime industry in the capacity of:Electro-Technical Officer (STCW Electro-Technical Officer Unlimited)Engineer Watchkeeper (STCW Engineer Watchkeeper Unlimited). Licensing/Regulatory InformationLegislative and regulatory requirements are applicable to this unit. This unit is one of the requirements to obtain Australian Maritime Safety Authority (AMSA) certification as an Electro-Technical Officer (STCW Electro-Technical Officer Unlimited) or Engineer Watchkeeper (STCW Engineer Watchkeeper Unlimited) and to meet regulatory requirements this unit must be delivered consistent with Marine Orders and with the relevant sections of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW).Those regulatory requirements include STCW International Maritime Organization (IMO) model course competencies and areas of knowledge, understanding and proficiency, together with the estimated total hours required for lectures and practical exercises. Teaching staff should note that timings are suggestions only and should be adapted to suit individual groups of trainees depending on their experience, ability, equipment and staff available for training.
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.

Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Practical assessment must occur in a workplace, or realistic industry approved marine operations site or simulated workplace, under the normal range of workplace conditions.

Simulations and scenarios may be used where situations cannot be provided in the workplace or may occur only rarely, in particular for situations relating to emergency procedures and adverse weather conditions where assessment would be unsafe, impractical or may lead to environmental damage.

Resources for assessment must include access to:

applicable documentation, such as legislation, regulations, codes of practice, workplace procedures and operational manuals

diagrams, specifications and other information required for performing basic calculations related to marine steam turbines

tools, equipment, machinery, materials and relevant personal protective equipment (PPE) currently used in industry.
Prerequisites/co-requisites
Competency Field L – Engineering
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Interpret an energy balance diagram for a shipboard steam plant
  • Ideal theoretical thermodynamic cycle for the operation of a steam plant is outlined
       
Element: Why actual expansion of steam through a turbine differs from ideal cycle is explained
       
Element: Typical heat losses around a steam plant are identified
       
Element: Effect of air pre-heating, feed heating and economisation upon energy balance of steam plant’s thermodynamic cycle are explained
       
Element: Typical heat (and/or mass) balance diagram for a ship’s steam plant is interpreted
       
Element: Explain construction and operation of marine high-pressure water boilers
  • Advantages of water tube boiler over fire tube boiler for shipboard applications are outlined
       
Element: Construction and operation of a ‘D’ type membrane furnace boiler with superheater, economiser and air pre-heater is explained
       
Element: External fittings required by classification society rules on any large boiler are identified
       
Element: Internal fittings of a boiler’s main steam drum are identified
       
Element: How automation is applied to boiler control is clarified
       
Element: Start-up, operation and shutdown of a main propulsion steam boiler are outlined
       
Element: Explain construction and operation of a main propulsion steam plant
  • How common forms of blading and rotor construction are manufactured is clarified
       
Element: How casings of common marine steam turbines are fitted out is clarified
       
Element: Principles of thermodynamics are applied to explain expansion of steam in a typical marine turbine
       
Element: Importance of start-up and warming-through procedures for a steam turbine set is conveyed
       
Element: Checks required during routine turbine operation are explained
       
Element: Safety devices for a steam turbine set are identified and normal emergency shutdown (ESD) procedures are identified
       
Element: Operation of turbines under normal and emergency conditions is outlined
       
Element: Explain auxiliary machinery required to support operation of main propulsion steam turbines and boilers
  • Construction and operation of different types of auxiliary machinery needed to support main propulsion steam turbines and boilers is outlined
       
Element: Construction and operation of steam and electric motor prime movers required for driving auxiliary machinery are outlined
       
Element: Explain configuration and operating principles of different steam distribution systems used in steam-powered vessels
  • Configuration and operating principles of different steam distribution systems is outlined
       
Element: Typical pressure reducing and pressure control valves suitable for steam service are outlined and illustrated
       
Element: Explain operation principles of close feed systems used by boiler/turbine sets
  • Difference between an open and a closed feed system is clarified
       
Element: Closed feed system is outlined
       
Element: Pressure feed heaters are outlined
       
Element: Chemical injection equipment suitable for use on any ship’s main feed system is explained
       
Element: Explain feed and boiler water treatment
  • Recommended limits of characteristics for boiler water and recommended intervals at which tests are undertaken are clarified
       
Element: Reasons for treating boiler water are outlined
       
Element: Different types of hardness in water, consequences if left untreated, and ways of minimising their effect are explained
       
Element: How corrosion within a boiler is minimised by treating boiler water is explained
       
Element: Causes and ways of avoiding carry-over and caustic embrittlement are explained
       
Element: Safety requirements for handling feed water and boiler water treatment chemicals are explained
       
Element: Explain transmission of power from the steam turbine main engine to the propeller
  • Why reduction gearing is required between steam turbines and propeller is clarified
       
Element: Generation of tooth form is outlined
       
Element: Double helical gearing and difference between single and double reduction gearing are explained
       
Element: Applications of epicyclic gearing are explained
       
Element: Function of flexible couplings in a turbine/gearing set is clarified
       
Element: Components of a driveline from main wheel connection, aft, to propeller are listed
       
Element: Methods and mechanisms for lubricating a driveline are detailed
       
Element: Explain procedures for preventing and responding to fires and explosions specific to steam propulsion plant
  • Causes, symptoms and means of preventing and extinguishing fires associated with steam propulsion plant are detailed
       
Element: Protective devices associated with boilers to minimise risk of fires, explosions and water shortages are identified
       
Element: Routine inspection and maintenance requirements to prevent fires, explosions and water shortages are outlined
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

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

accessing diagnostic information related to marine steam turbines

applying relevant work health and safety (WHS)/occupational health and safety (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 when operating steam propulsion plant and associated systems on a steam vessel

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

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

providing accurate and reliable information

providing appropriate level of detail in responses

reading and interpreting manuals, technical specifications, safety data sheets (SDS)/material safety data sheets (MSDS) 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 and performance criteria and include knowledge of:

auxiliary machinery, including:

lube oil supply pump and system

main boiler forced draught fan

main condensate extraction pump and air ejector

main condenser

main cooling water circulating pump

main feed pump

main fuel oil supply pump and system

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

construction and operation of main and auxiliary steam turbines

methods of turbine control, including safety devices

procedures for emergency operation of a steam turbine

Rankine cycle

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

effective verbal, written and visual communication strategies

established engineering practice and procedures for operating shipboard steam propulsion plant and associated systems in warm-through, manoeuvring, start-up, normal running, and emergency shutdown (ESD) situations

fires, including:

blow back

economiser

explosions

low water level

uptake

fundamental principles of steam propulsion systems and boilers

hazards and problems that can occur when operating steam propulsion plant and associated systems, and appropriate preventative and remedial action

marine steam turbines, including:

impulse

reaction

methods of lubricating the 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, interpretation of readings and indications of the performance of steam propulsion plant and associated systems

safety devices, including:

axial movement

gland temperature

lube oil pressure

lube oil temperature

remote stops

safety valves

vacuum condenser pressure

vibration

steam distribution systems, including:

auxiliary exhaust steam range

auxiliary superheated steam range

bled steam systems

superheated main steam range

types, properties, tests, applications and treatment of fuels, lubricants, and solvents/chemicals used onboard a steam vessel, including a basic understanding of the 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 is in compliance with bridge orders, technical specifications, survey requirements and established safety and anti-pollution rules and regulations

units of measurement

warming-through procedures, including:

ensuring air vent is open

minimising thermal shock

shutting down

warming up according to manufacturer instructions

WHS/OHS legislation and policies.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

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

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Ideal theoretical thermodynamic cycle for the operation of a steam plant is outlined 
 
 
 
 
Advantages of water tube boiler over fire tube boiler for shipboard applications are outlined 
 
 
 
 
 
How common forms of blading and rotor construction are manufactured is clarified 
 
 
 
 
 
 
Construction and operation of different types of auxiliary machinery needed to support main propulsion steam turbines and boilers is outlined 
 
Configuration and operating principles of different steam distribution systems is outlined 
 
Difference between an open and a closed feed system is clarified 
 
 
 
Recommended limits of characteristics for boiler water and recommended intervals at which tests are undertaken are clarified 
 
 
 
 
 
Why reduction gearing is required between steam turbines and propeller is clarified 
 
 
 
 
 
 
Causes, symptoms and means of preventing and extinguishing fires associated with steam propulsion plant are detailed 
 
 

Forms

Assessment Cover Sheet

MARL059 - Demonstrate basic knowledge of marine steam turbines and main boilers
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Assessment Record Sheet

MARL059 - Demonstrate basic knowledge of marine steam turbines and main boilers

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