Unit of competency Outline

Date retreived
22/07/2026 5:57 AM AWST

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Apply intermediate principles of marine engineering thermodynamics

Apply intermediate principles of marine engineering thermodynamics

Unit of competency
National Code
MARL6002A
State Code
WG472
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
1.00
Current Release Date
06/06/2013
State Implementation and Classification
Approved Date
05/02/2014
Field of Education
031701 - Maritime Engineering
Original Release Date
05/02/2014
Nominal Hours
35
Description
This unit involves the skills and knowledge required to apply intermediate principles of marine engineering thermodynamics to perform calculations and explain the operation of marine machinery, including engines, compressors, steam plants, refrigeration and air-conditioning units.
Notes
Elements and Performance Criteria
1 Calculate heat mixtures involving water equivalent, change of phase, and feed heating
  • 1.1 Key terms associated with heat transmission are explained
  • 1.2 Heat transfer is calculated between liquids and solids using water equivalent
  • 1.3 Flow is differentiated from non-flow heating and cooling processes
  • 1.4 Effects of superheating and sub-cooling on steam plant efficiency are outlined
  • 1.5 Mass balance throughout a steam plant cycle is constructed and effects of pressure and temperature on cycle efficiency are analysed
2 Determine fluid properties of steam
  • 2.1 Relationship between saturated and superheated steam, including dryness fraction, is explained
  • 2.2 Regions on a temperature/enthalpy diagram are constructed and identified
  • 2.3 Steam tables are used to determine fluid properties
  • 2.4 Changes of enthalpy throughout a system are identified
  • 2.5 Operating principles and application in steam plants of throttling, separating and combined throttling, and separating calorimeters are explained
  • 2.6 Calorimeters are applied to determine dryness fraction of steam
3 Calculate boiler efficiency and boiler water density
  • 3.1 Efficiency of saturated and superheated steam boilers is calculated
  • 3.2 Where loss of efficiency occurs is shown
  • 3.3 Concept of parts per million for density of boiler water is explained
  • 3.4 Changes in boiler water density due to contaminated feed are calculated
  • 3.5 How acceptable dissolved solids and water levels may be maintained in a boiler is shown
4 Determine steam turbine velocity
  • 4.1 Principles and differences between pressure and velocity changes in reaction and impulse steam turbines are explained
  • 4.2 Velocity diagrams to calculate steam velocity at exit of nozzles and blades are applied
  • 4.3 Graphical and mathematical methods to determine blade angle, steam velocity, thrust, power, and efficiency of single stage impulse and reaction steam turbines are applied
5 Calculate calorific value and the air fuel ratio for solid and liquid fuels
  • 5.1 Elements and compounds present in fuel and the products of combustion are evaluated
  • 5.2 Air/fuel ratio, gravimetric and volumetric analysis are explained
  • 5.3 Chemical equations for combustion elements and compounds are developed and elements of combustion are analysed
  • 5.4 Bomb calorimeter is used to find calorific value of a fuel
  • 5.5 Formula to calculate calorific value of a fuel from mass analysis of fuel is applied
  • 5.6 Air required for combustion is calculated
6 Calculate thermal expansion
  • 6.1 Coefficient of linear expansion and its significance to different materials is explained
  • 6.2 Clearances and shrunk fit allowances are calculated
  • 6.3 Stresses generated with restricted expansion are calculated
  • 6.4 Volumetric expansion of solid and liquids, and allowance required for fluid expansion in tanks and systems is calculated
7 Apply gas law equations
  • 7.1 Compression and pressure ratio is explained and related to combined gas law equation
  • 7.2 Combined gas law equation is applied to constant volume and constant pressure processes
  • 7.3 Specific gas constant of a gas or mixture of gases is calculated
  • 7.4 Differentiation is made between specific heat of gases, ratio of specific heats, work and change in internal energy
  • 7.5 Changes in internal energy associated with specific heat of gases, ratio of specific heats and work are calculated
8 Calculate gas conditions, work and thermal efficiency of internal combustion engines
  • 8.1 Processes associated with expansion and compression of gases are explained
  • 8.2 Gas conditions and index of compression at end of each process are determined
  • 8.3 Work formula is derived for each process and derived formula is applied to calculate work and power per cycle
  • 8.4 Air standard cycle is applied to determine amount of fuel consumed and work produced by an internal combustion engine
  • 8.5 Differentiation is made between air standard efficiency and thermal efficiency
  • 8.6 Thermal efficiency of engine cycles is calculated
9 Perform calculations related to refrigeration and air conditioning cycles
  • 9.1 Pressure/enthalpy diagram is applied to describe the refrigeration cycle
  • 9.2 Importance of superheating and under-cooling in determining stability and well-functioning of refrigeration systems is explained
  • 9.3 Properties and hazards of refrigerants used in refrigeration and air conditioning systems are identified
  • 9.4 Refrigeration tables are applied to calculate refrigeration effect, cooling load and coefficient of performance
  • 9.5 Basic air conditioning cycles are explained
  • 9.6 Wet and dry bulb temperatures are explained
  • 9.7 Humidity conditions are determined using psychrometric charts
10 Solve heat transfer problems involving flat plates and thin cylinders
  • 10.1 Different forms of heat transfer are identified
  • 10.2 Heat flow through composite flat plates using thermal conductivity is calculated
  • 10.3 Interface temperatures of composite flat layers are calculated
  • 10.4 Radial conduction of heat through a thin cylinder is calculated
11 Solve problems related to single and multi stage air compression
  • 11.1 Pressure–volume diagram is applied to describe operating cycle of reciprocating compressors
  • 11.2 Work done by constant pressure, isothermal processes and polytropic processes in reciprocating compressors is calculated
  • 11.3 Effect of clearance volume on efficiency of reciprocating compressors is explained
  • 11.4 Volumetric efficiency and free air discharge in reciprocating compressors is calculated
  • 11.5 Volume, mass flow and temperature are calculated at completion of each process in reciprocating compressors
  • 11.6 How inter-cooling and after-cooling affects overall efficiency of reciprocating compressors is explained
  • 11.7 Quantity of cooling water required by reciprocating compressors is calculated
12 Perform calculations related to engine power and heat balances
  • 12.1 Indicator and timing diagrams for internal combustion engines are plotted
  • 12.2 Formula is applied to solve problems related to indicated power of internal combustion engines
  • 12.3 Formula is applied to solve problems related to brake power of internal combustion engines
  • 12.4 Morse test is applied to determine the indicated power of internal combustion engines
  • 12.5 Tabular and graphical heat balance diagrams are applied to calculate mechanical, thermal and overall efficiencies of internal combustion engines
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below.
Key terms may include:
Enthalpy of fusion
Evaporation
Sensible heat
Transfer of heat energy
Processes may include:
Adiabatic
Isothermal
Polytropic
Fluid properties include:
Density
Dryness faction
Enthalpy of water
Pressure
Saturated steam
Specific volume
Superheated steam
Temperature
Forms of heat transfer may include:
Conduction
Convection
Radiation
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:
making 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 intermediate principles of marine engineering thermodynamics can be applied
diagrams, specifications and other information required for performing intermediate calculations related to marine engineering thermodynamics
technical reference library with current publications on intermediate 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.
Method of assessment
Practical assessment must occur in an:
appropriately simulated workplace environment and/or
appropriate range of situations in the workplace.
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 intermediate 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.
Replaced By
State Code National Code Title Type
AUG45 MARL015 Apply intermediate principles of marine engineering thermodynamics Unit of competency
State Code National Code Title Type
J567 MAR60113 Advanced Diploma of Maritime Operations (Marine Engineering Class 2) Qualification