Unit of competency Outline

Date retreived
23/07/2026 12:46 AM AWST

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Apply basic principles of marine engineering thermodynamics

Apply basic principles of marine engineering thermodynamics

Unit of competency
National Code
MARL011
State Code
AUG51
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
1.00
Current Release Date
27/02/2015
View on TGA
State Implementation and Classification
Approved Date
28/08/2015
Field of Education
031701 - Maritime Engineering
Original Release Date
28/08/2015
Nominal Hours
50
Description
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.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).No licensing, legislative or certification requirements apply to this unit at the time of publication.
Notes
Elements and Performance Criteria
1 Explain common thermodynamic principles
  • 1.1 Desired System International (SI) units applicable to thermodynamic calculations are developed
  • 1.2 Basic properties of fluids are outlined
  • 1.3 Gauge pressure is distinguished from absolute pressure
  • 1.4 Temperature is defined and temperature scales are outlined
  • 1.5 Calculations are performed by applying formulae for work, power and efficiency
2 Calculate properties of gas during expansion and compression
  • 2.1 Calculations are performed by applying Boyle’s, Charles’s and combined gas law
  • 2.2 Gas equation is derived and applied to gas process calculations
  • 2.3 Specific heat of gases and the relationship between Cp, Cv, R and Gamma is defined
  • 2.4 Heat transfer is calculated for constant pressure and constant volume processes
  • 2.5 Isothermal, adiabatic and polytropic processes are outlined and properties of gases after expansion and compression including the effects of turbocharging are calculated
  • 2.6 Work required to compress gases is illustrated and calculated
3 Explain methods of heat transfer
  • 3.1 Different forms of heat transfer and their application to marine systems are explained
  • 3.2 Heat transfer through flat layers is calculated
  • 3.3 Purpose of insulation is explained
4 Explain enthalpy and apply to mixture calculations
  • 4.1 Heat energy is defined
  • 4.2 Fundamental formula for heat energy transfer is developed
  • 4.3 Specific heat and its application are identified
  • 4.4 Enthalpy and change of phase are outlined
  • 4.5 Heat mixture problems involving water equivalent, ice, water and steam are solved
  • 4.6 Specific heat of materials are calculated
  • 4.7 Latent heat and dryness fraction are identified
  • 4.8 Steam tables are used to find values of enthalpy for water, saturated and superheated steam and dryness fraction
  • 4.9 Temperature/enthalpy diagram is constructed from steam table data
5 Explain steam plants and calculate thermal efficiency
  • 5.1 Basic steam plant cycles are sketched and function of each component is outlined
  • 5.2 Steam cycles on a temperature/enthalpy diagram are illustrated
  • 5.3 Effects of superheating and under cooling are clarified
  • 5.4 Calculations are performed for heat supplied, rejected, work and thermal efficiency of a steam plant
  • 5.5 Methods of improving cycle efficiency are outlined
6 Explain operation of internal combustion engine cycles
  • 6.1 Operating principles of two stroke and four stroke internal combustion engines are outlined
  • 6.2 Differentiation is made, by use of a pressure/volume diagram, between Otto, Diesel and Dual combustion cycles
  • 6.3 Mean effective pressure is calculated from an indicator diagram
  • 6.4 Indicated power formula is developed and related calculations are solved
  • 6.5 Specific fuel consumption is defined and calculated
  • 6.6 Ideal cycle and air standard efficiency is defined
7 Explain operating cycle of reciprocating air compressors
  • 7.1 Pressure/volume diagram is used to describe operating cycle of single stage reciprocating air compressors
  • 7.2 Mass of air delivered by single stage reciprocating air compressors is calculated
  • 7.3 Clearance volume and its effect on volumetric efficiency is outlined, and volumetric efficiency is calculated
  • 7.4 Work per cycle for isothermal and polytropic processes is calculated
8 Explain operating cycle of refrigeration and air conditioning plant
  • 8.1 Principle of refrigeration is outlined
  • 8.2 Temperature/enthalpy and pressure/enthalpy diagrams are compared
  • 8.3 Refrigerants used in refrigeration and air conditioning machines are identified
  • 8.4 Refrigeration effect and plant capacity are defined
  • 8.5 Refrigeration tables are used to calculate refrigeration effect and condition of vapour after expansion
  • 8.6 Operating cycle of self-contained and centralised air conditioning systems are outlined and compared
  • 8.7 Relative humidity is defined and key features of a psychrometric chart are outlined
9 Apply linear, superficial and volumetric expansion equations to calculate expansion of liquids and metals
  • 9.1 Expansion processes for metals is defined
  • 9.2 Coefficient of linear expansion is outlined
  • 9.3 Linear expansion is applied to calculate machinery clearances and to shrink fit allowances
  • 9.4 Superficial and volumetric expansion of solids is calculated and recorded
  • 9.5 Apparent expansion of liquids in tanks is calculated and recorded
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No information
Replaces
State Code National Code Title Type
WG460 MARL5002A Apply basic principles of marine engineering thermodynamics Unit of competency
Replaced By
State Code National Code Title Type
OCG56 MARL043 Apply basic principles of marine engineering thermodynamics Unit of competency
State Code National Code Title Type
AVQ1 MAR50115 Diploma of Maritime Operations (Engineer Watchkeeper) Qualification