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

MARL043 Mapping and Delivery Guide
Apply basic principles of marine engineering thermodynamics

Version 1.0
Issue Date: May 2024


Qualification -
Unit of Competency MARL043 - Apply basic principles of marine engineering thermodynamics
Description
Employability Skills
Learning Outcomes and Application This unit involves the skills and knowledge required to apply basic principles of engineering thermodynamics to perform calculations and to explain the operation of marine machinery, including engines, compressors, steam plants, and refrigeration and air conditioning (RAC) units.This unit applies to people working in the maritime industry in the capacity of: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 Engineer Watchkeeper (STCW Engineer Watchkeeper Unlimited) 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 satisfy applicable regulatory requirements, which include requirements in 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 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 engineering thermodynamics

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: Explain common thermodynamic principles
  • Desired International System of Units (SI) applicable to thermodynamic calculations are developed
       
Element: Basic properties of fluids are outlined
       
Element: Gauge pressure is distinguished from absolute pressure
       
Element: Temperature is defined and temperature scales are outlined
       
Element: Calculations are performed by applying formulae for work, power and efficiency
       
Element: Calculate properties of gas during expansion and compression
  • Calculations are performed by applying Boyle’s, Charles’s and combined gas laws
       
Element: Gas equation is derived and applied to gas process calculations
       
Element: Specific heat of gases and the relationship between constant pressure (Cp), constant volume (Cv), gas constant (R) and Gamma (G) are defined
       
Element: Heat transfer is calculated for Cp and Cv processes
       
Element: Isothermal, adiabatic and polytropic processes are outlined and properties of gases after expansion and compression, including the effects of turbocharging, are calculated
       
Element: Work required to compress gases is illustrated and calculated
       
Element: Explain methods of heat transfer
  • Different forms of heat transfer and their application to marine systems are explained
       
Element: Heat transfer through flat layers is calculated
       
Element: Purpose of insulation is explained
       
Element: Explain enthalpy and apply to mixture calculations
  • Heat energy is defined
       
Element: Fundamental formula for heat energy transfer is developed
       
Element: Specific heat and its application are identified
       
Element: Enthalpy and change of phase are outlined
       
Element: Heat mixture problems involving water equivalent, ice, water and steam are solved
       
Element: Specific heat of materials are calculated
       
Element: Latent heat and dryness fraction are identified
       
Element: Steam tables are used to find values of enthalpy for water, saturated and superheated steam and dryness fraction
       
Element: Temperature/enthalpy diagram is constructed from steam table data
       
Element: Explain steam plants and calculate thermal efficiency
  • Basic steam plant cycles are sketched and function of each component is outlined
       
Element: Steam cycles on a temperature/enthalpy diagram are illustrated
       
Element: Effects of superheating and under-cooling are clarified
       
Element: Calculations are performed for heat supplied, rejected, work and thermal efficiency of a steam plant
       
Element: Methods of improving cycle efficiency are outlined
       
Element: Explain operation of internal combustion engine cycles
  • Operating principles of two-stroke and four-stroke internal combustion engines are outlined
       
Element: Differentiation is made, by use of a pressure/volume diagram, between Otto, diesel and dual combustion cycles
       
Element: Mean effective pressure is calculated from an indicator diagram
       
Element: Indicated power formula is developed and related calculations are solved
       
Element: Specific fuel consumption is defined and calculated
       
Element: Ideal cycle and air standard efficiency is defined
       
Element: Explain operating cycle of reciprocating air compressors
  • Pressure/volume diagram is used to describe operating cycle of single stage reciprocating air compressors
       
Element: Mass of air delivered by single stage reciprocating air compressors is calculated
       
Element: Clearance volume and its effect on volumetric efficiency is outlined, and volumetric efficiency is calculated
       
Element: Work per cycle for isothermal and polytropic processes is calculated
       
Element: Explain operating cycle of RAC plant
  • Principle of refrigeration is outlined
       
Element: Temperature/enthalpy and pressure/enthalpy diagrams are compared
       
Element: Refrigerants used in RAC machines are identified
       
Element: Refrigeration effect and plant capacity are defined
       
Element: Refrigeration tables are used to calculate refrigeration effect and condition of vapour after expansion
       
Element: Operating cycle of self-contained and centralised air conditioning systems are outlined and compared
       
Element: Relative humidity is defined and key features of a psychrometric chart are outlined
       
Element: Apply linear, superficial and volumetric expansion equations to calculate expansion of liquids and metals
  • Expansion processes for metals is defined
       
Element: Coefficient of linear expansion is outlined
       
Element: Linear expansion is applied to calculate machinery clearances and to shrink fit allowances
       
Element: Superficial and volumetric expansion of solids is calculated and recorded
       
Element: Apparent expansion of liquids in tanks is calculated and recorded
       


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:

identifying and applying relevant mathematical formulas and techniques to solve basic problems related to engineering thermodynamics

identifying and interpreting numerical and graphical information, and performing basic mathematical calculations related to engineering thermodynamics, such as gas expansion and contraction, heat transfer, thermal efficiency, and the expansion of liquids and solids

identifying, collating and processing information required to perform basic calculations related to engineering thermodynamics

maintaining knowledge of current codes, standards, regulations and industry practices

performing accurate and reliable mathematical calculations using a calculator

reading and interpreting written information needed to perform basic calculations related to engineering thermodynamics

solving problems using appropriate laws and principles.

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:

basic principles of engineering thermodynamics

enthalpy

expansion processes for metals (conduction, convection and radiation)

forms of heat transfer (conduction, convection and radiation)

gas laws

heat, including relationship between temperature, heat energy and heat transfer

internal combustion engine cycles

methods of heat transfer

operating cycle of reciprocating air compressors

operating principles of two-stroke and four-stroke internal combustion engines

principles of refrigeration

properties of fluids (density, mass, pressure, specific volume, temperature)

relationships between forms of energy, work and power

International System of Units (SI)

steam plants

thermodynamics, including:

energy change

heat transfer

ideal gases

thermodynamic energy

thermodynamic principles

thermodynamic processes

thermodynamic properties

thermodynamic systems

vapours

work transfer

thermal efficiency calculations.

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
Desired International System of Units (SI) applicable to thermodynamic calculations are developed 
 
 
 
 
Calculations are performed by applying Boyle’s, Charles’s and combined gas laws 
 
 
 
 
 
Different forms of heat transfer and their application to marine systems are explained 
 
 
Heat energy is defined 
 
 
 
 
 
 
 
 
Basic steam plant cycles are sketched and function of each component is outlined 
 
 
 
 
Operating principles of two-stroke and four-stroke internal combustion engines are outlined 
 
 
 
 
 
Pressure/volume diagram is used to describe operating cycle of single stage reciprocating air compressors 
 
 
 
Principle of refrigeration is outlined 
 
 
 
 
 
 
Expansion processes for metals is defined 
 
 
 
 

Forms

Assessment Cover Sheet

MARL043 - Apply basic principles of marine engineering thermodynamics
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Assessment Record Sheet

MARL043 - Apply basic principles of marine engineering thermodynamics

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