MARL5002A - Apply basic principles of marine engineering thermodynamics
Assessor Resource
MARL5002A Apply basic principles of marine engineering thermodynamics
Assessment tool
Version 1.0 Issue Date: May 2024
This unit applies to the work of Marine Engineering Watchkeepers on commercial vessels greater than 750 kW and forms part of the requirements for the Certificate of Competency Marine Engineer Watchkeeper issued by the Australian Maritime Safety Authority (AMSA).
This unit involves the skills and knowledge required to apply basic principles of marine engineering thermodynamics to perform calculations and to explain the operation of marine machinery, including engines, compressors, steam plants, refrigeration and air-conditioning units.
You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)
Prerequisites
Not applicable.
Employability Skills
This unit contains employability skills.
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.
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, the required skills and knowledge, the range statement and the Assessment Guidelines for the Training Package.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
The evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the Elements, Performance Criteria, Required Skills, Required Knowledge and include:
performing accurate and reliable calculations
solving problems using appropriate laws and principles.
Context of and specific resources for assessment
Performance is demonstrated consistently over time and in a suitable range of contexts.
Resources for assessment include access to:
industry-approved marine operations site where basic principles of marine engineering thermodynamics can be applied
diagrams, specifications and other information required for performing basic calculations related to marine engineering thermodynamics
technical reference library with current publications on basic marine thermodynamics
tools, equipment and personal protective equipment currently used in industry
relevant regulatory and equipment documentation that impacts on work activities
range of relevant exercises, case studies and/or other simulated practical and knowledge assessments
appropriate range of relevant operational situations in the workplace.
In both real and simulated environments, access is required to:
relevant and appropriate materials and equipment
applicable documentation including workplace procedures, regulations, codes of practice and operation manuals.
A range of assessment methods should be used to assess practical skills and knowledge. The following examples are appropriate to this unit:
direct observation of the candidate applying basic principles of marine engineering thermodynamics
direct observation of the candidate applying relevant WHS/OHS requirements and work practices.
Guidance information for assessment
Holistic assessment with other units relevant to the industry sector, workplace and job role is recommended.
In all cases where practical assessment is used it should be combined with targeted questioning to assess Required Knowledge.
Assessment processes and techniques must be appropriate to the language and literacy requirements of the work being performed and the capacity of the candidate.
Submission Requirements
List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, 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.
Required Skills:
Assess own work outcomes and maintain knowledge of current codes, standards, regulations and industry practices
Explain basic principles of marine engineering thermodynamics
Identify and apply relevant mathematical formulas and techniques to solve basic problems related to marine engineering thermodynamics
Identify and interpret numerical and graphical information, and perform basic mathematical calculations related to marine engineering thermodynamics, such as gas expansion and contraction, heat transfer, thermal efficiency, and the expansion of liquids and solids
Identify, collate and process information required to perform basic calculations related to marine engineering thermodynamics
Impart knowledge and ideas through verbal, written and visual means
Read and interpret written information needed to perform basic calculations related to marine engineering thermodynamics
Use calculators to perform mathematical calculations
Required Knowledge:
Enthalpy
Expansion processes for metals (conduction, convection, radiation)
Forms of heat transfer (conduction, convection, radiation)
Gas laws
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)
SI units
Steam plants
Thermodynamic principles
Thermal efficiency calculations
Work health and safety (WHS)/occupational health and safety OHS requirements and work practices
Not applicable.
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 System International (SI) units applicable to thermodynamic calculations are developed
Basic properties of fluids are outlined
Gauge pressure is distinguished from absolute pressure
Temperature is defined and temperature scales are outlined
Calculations are performed by applying formulae for work, power and efficiency
Calculations are performed by applying Boyle’s, Charles’s and combined gas law
Gas equation is derived and applied to gas process calculations
Specific heat of gases and the relationship between Cp, Cv, R and Gamma is defined
Heat transfer is calculated for constant pressure and constant volume processes
Isothermal, adiabatic and polytropic processes are outlined and properties of gases after expansion and compression including the effects of turbocharging are calculated
Work required to compress gases is illustrated and calculated
Different forms of heat transfer and their application to marine systems are explained
Heat transfer through flat layers is calculated
Purpose of insulation is explained
Heat energy is defined
Fundamental formula for heat energy transfer is developed
Specific heat and its application are identified
Enthalpy and change of phase are outlined
Heat mixture problems involving water equivalent, ice, water and steam are solved
Specific heat of materials are calculated
Latent heat and dryness fraction are identified
Steam tables are used to find values of enthalpy for water, saturated and superheated steam and dryness fraction
Temperature/enthalpy diagram is constructed from steam table data
Basic steam plant cycles are sketched and function of each component is outlined
Steam cycles on a temperature/enthalpy diagram are illustrated
Effects of superheating and under cooling are clarified
Calculations are performed for heat supplied, rejected, work and thermal efficiency of a steam plant
Methods of improving cycle efficiency are outlined
Operating principles of two stroke and four stroke internal combustion engines are outlined
Differentiation is made, by use of a pressure/volume diagram, between Otto, Diesel and Dual combustion cycles
Mean effective pressure is calculated from an indicator diagram
Indicated power formula is developed and related calculations are solved
Specific fuel consumption is defined and calculated
Ideal cycle and air standard efficiency is defined
Pressure/volume diagram is used to describe operating cycle of single stage reciprocating air compressors
Mass of air delivered by single stage reciprocating air compressors is calculated
Clearance volume and its effect on volumetric efficiency is outlined, and volumetric efficiency is calculated
Work per cycle for isothermal and polytropic processes is calculated
Principle of refrigeration is outlined
Temperature/enthalpy and pressure/enthalpy diagrams are compared
Refrigerants used in refrigeration and air conditioning machines are identified
Refrigeration effect and plant capacity are defined
Refrigeration tables are used to calculate refrigeration effect and condition of vapour after expansion
Operating cycle of self-contained and centralised air conditioning systems are outlined and compared
Relative humidity is defined and key features of a psychrometric chart are outlined
Expansion processes for metals is defined
Coefficient of linear expansion is outlined
Linear expansion is applied to calculate machinery clearances and to shrink fit allowances
Superficial and volumetric expansion of solids is calculated
Apparent expansion of liquids in tanks is calculated
Forms
Assessment Cover Sheet
MARL5002A - Apply basic principles of marine engineering thermodynamics
Assessment task 1: [title]
Student name:
Student ID:
I declare that the assessment tasks submitted for this unit are my own work.
Student signature:
Result: Competent Not yet competent
Feedback to student
Assessor name:
Signature:
Date:
Assessment Record Sheet
MARL5002A - Apply basic principles of marine engineering thermodynamics
Student name:
Student ID:
Assessment task 1: [title] Result: Competent Not yet competent
(add lines for each task)
Feedback to student:
Overall assessment result: Competent Not yet competent