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Evidence Guide: MARL019 - Apply advanced principles of marine engineering thermodynamics

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

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MARL019 - Apply advanced principles of marine engineering thermodynamics

What evidence can you provide to prove your understanding of each of the following citeria?

Calculate heat energy with and without phase change

  1. Enthalpy is applied to heat mixture calculations with or without phase change
  2. Enthalpy is applied to calculate resultant conditions of hot wells involving multiple returns
  3. Steam conditions in a system when using throttling devices and separators are calculated
  4. Entropy is distinguished from enthalpy
  5. Entropy values are determined from standard tables
Enthalpy is applied to heat mixture calculations with or without phase change

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Enthalpy is applied to calculate resultant conditions of hot wells involving multiple returns

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Steam conditions in a system when using throttling devices and separators are calculated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Entropy is distinguished from enthalpy

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Entropy values are determined from standard tables

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Analyse change of phase and state diagrams

  1. Tables and/or diagrams are used to find enthalpy and entropy values for liquid, part liquid-part vapour and vapour states
  2. Carnot cycle is outlined
  3. Rankine cycle is outlined
  4. Isentropic efficiency is explained
  5. Problems are solved involving the efficiency of steam turbines operating in the Rankine cycle
Tables and/or diagrams are used to find enthalpy and entropy values for liquid, part liquid-part vapour and vapour states

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Carnot cycle is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Rankine cycle is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Isentropic efficiency is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Problems are solved involving the efficiency of steam turbines operating in the Rankine cycle

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply Dalton’s law of partial pressures to steam condensers

  1. Dalton’s Law is applied to calculate air and condensate extraction from condensers
  2. Problems are solved involving cooling water mass flow and cooling water pump work
Dalton’s Law is applied to calculate air and condensate extraction from condensers

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Problems are solved involving cooling water mass flow and cooling water pump work

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply chemical equations for complete and incomplete combustion

  1. Atomic and molecular weights and kilogram-mol are explained
  2. Calorific value of a fuel is calculated by chemical formula
  3. Mass of air required for stoichiometric combustion is calculated by gravimetric and volumetric analysis
  4. Air fuel ratio is determined when supplied with composition of fuel and exhaust gas analysis
Atomic and molecular weights and kilogram-mol are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calorific value of a fuel is calculated by chemical formula

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Mass of air required for stoichiometric combustion is calculated by gravimetric and volumetric analysis

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Air fuel ratio is determined when supplied with composition of fuel and exhaust gas analysis

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply gas laws to analyse internal combustion engine efficiencies

  1. Universal gas constant form AVOGADRO S hypothesis is determined
  2. Heat transfer is calculated for constant volume and constant pressure processes
  3. First law of thermodynamics is applied to thermodynamic processes in a closed system
  4. Second law of thermodynamics is applied to find thermal efficiency of Carnot cycle
  5. Mathematical formula is applied to solve problems related to ideal constant volume air standard cycle
  6. Mathematical formula is applied to solve problems related to diesel and dual cycles
Universal gas constant form AVOGADRO S hypothesis is determined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Heat transfer is calculated for constant volume and constant pressure processes

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

First law of thermodynamics is applied to thermodynamic processes in a closed system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Second law of thermodynamics is applied to find thermal efficiency of Carnot cycle

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Mathematical formula is applied to solve problems related to ideal constant volume air standard cycle

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Mathematical formula is applied to solve problems related to diesel and dual cycles

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculate performance of internal combustion and gas turbine engines

  1. P/V and out of phase engine indicator diagrams are analysed
  2. Work, power, mean effective pressure and thermal efficiency of internal combustion engine cycles is calculated
  3. Heat transfer to jacket cooling systems is calculated
  4. Open and closed systems for gas turbines are outlined
  5. Temperature/entropy diagrams are applied to illustrate gas turbine cycles
  6. Power, isentropic efficiencies, thermal efficiency, work and fuel consumption for gas turbine cycles is calculated
  7. Methods to increase efficiency of gas turbines are specified
  8. Reheaters and intercoolers and how they improve efficiency is explained
P/V and out of phase engine indicator diagrams are analysed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Work, power, mean effective pressure and thermal efficiency of internal combustion engine cycles is calculated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Heat transfer to jacket cooling systems is calculated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Open and closed systems for gas turbines are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Temperature/entropy diagrams are applied to illustrate gas turbine cycles

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Power, isentropic efficiencies, thermal efficiency, work and fuel consumption for gas turbine cycles is calculated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Methods to increase efficiency of gas turbines are specified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Reheaters and intercoolers and how they improve efficiency is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Analyse air compressor performance

  1. Compressor types are classified
  2. Volumetric efficiency at free air conditions is explained
  3. Work is calculated for isothermal and adiabatic compression, and effect of clearance for reciprocating compressor
  4. Pressure ratio for compressor types is analysed
  5. Problems are solved relating to multi-staging and intercooling
  6. Heat transfer to air or cooling water from an air compressor is calculated
  7. Formula to calculate work and efficiency of centrifugal compressors is derived
Compressor types are classified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Volumetric efficiency at free air conditions is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Work is calculated for isothermal and adiabatic compression, and effect of clearance for reciprocating compressor

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Pressure ratio for compressor types is analysed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Problems are solved relating to multi-staging and intercooling

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Heat transfer to air or cooling water from an air compressor is calculated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Formula to calculate work and efficiency of centrifugal compressors is derived

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Analyse vapour compression refrigeration cycles

  1. Design parameters for a vapour compression cycle are explained
  2. Pressure/enthalpy diagram is prepared for a refrigeration cycle
  3. Heat rejected, work done and coefficient of performance (COP) for a basic cycle is calculated
  4. Effect of sub cooling and superheating is shown on a temperature/entropy diagram
  5. COP is calculated with evaporators operating at two different pressures
Design parameters for a vapour compression cycle are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Pressure/enthalpy diagram is prepared for a refrigeration cycle

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Heat rejected, work done and coefficient of performance (COP) for a basic cycle is calculated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Effect of sub cooling and superheating is shown on a temperature/entropy diagram

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

COP is calculated with evaporators operating at two different pressures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply psychrometric principles to solve air conditioning problems

  1. Comfort conditions for air conditioning systems are defined
  2. Key parameters used in defining air condition are illustrated on a psychrometric chart
  3. Cooling loads are calculated
  4. Problems associated with air delivering and distribution methods are analysed
  5. Methods of controlling noise and vibration in air conditioning systems are analysed
Comfort conditions for air conditioning systems are defined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Key parameters used in defining air condition are illustrated on a psychrometric chart

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Cooling loads are calculated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Problems associated with air delivering and distribution methods are analysed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Methods of controlling noise and vibration in air conditioning systems are analysed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Analyse different methods of heat transfer

  1. Heat flow through composite divisions is calculated
  2. Insulation dimensions and interface temperatures are determined
  3. Problems relating to radiated energy are solved by applying Stefan-Boltzmann Law
  4. Problems in heat exchangers are solved by applying log mean temperature difference
  5. Relative efficiency of contra-flow heat exchange is determined
Heat flow through composite divisions is calculated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Insulation dimensions and interface temperatures are determined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Problems relating to radiated energy are solved by applying Stefan-Boltzmann Law

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Problems in heat exchangers are solved by applying log mean temperature difference

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Relative efficiency of contra-flow heat exchange is determined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply Dalton’s law of partial pressures to steam condensers

  1. Dalton’s Law is applied to calculate air and condensate extraction from condensers
  2. Problems are solved involving cooling water mass flow and cooling water pump work
Dalton’s Law is applied to calculate air and condensate extraction from condensers

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Problems are solved involving cooling water mass flow and cooling water pump work

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Calculate heat energy with and without phase change

1.1

Enthalpy is applied to heat mixture calculations with or without phase change

1.2

Enthalpy is applied to calculate resultant conditions of hot wells involving multiple returns

1.3

Steam conditions in a system when using throttling devices and separators are calculated

1.4

Entropy is distinguished from enthalpy

1.5

Entropy values are determined from standard tables

2

Analyse change of phase and state diagrams

2.1

Tables and/or diagrams are used to find enthalpy and entropy values for liquid, part liquid-part vapour and vapour states

2.2

Carnot cycle is outlined

2.3

Rankine cycle is outlined

2.4

Isentropic efficiency is explained

2.5

Problems are solved involving the efficiency of steam turbines operating in the Rankine cycle

3

Apply Dalton’s law of partial pressures to steam condensers

3.1

Dalton’s Law is applied to calculate air and condensate extraction from condensers

3.2

Problems are solved involving cooling water mass flow and cooling water pump work

4

Apply chemical equations for complete and incomplete combustion

4.1

Atomic and molecular weights and kilogram-mol are explained

4.2

Calorific value of a fuel is calculated by chemical formula

4.3

Mass of air required for stoichiometric combustion is calculated by gravimetric and volumetric analysis

4.4

Air fuel ratio is determined when supplied with composition of fuel and exhaust gas analysis

5

Apply gas laws to analyse internal combustion engine efficiencies

5.1

Universal gas constant form AVOGADRO S hypothesis is determined

5.2

Heat transfer is calculated for constant volume and constant pressure processes

5.3

First law of thermodynamics is applied to thermodynamic processes in a closed system

5.4

Second law of thermodynamics is applied to find thermal efficiency of Carnot cycle

5.5

Mathematical formula is applied to solve problems related to ideal constant volume air standard cycle

5.6

Mathematical formula is applied to solve problems related to diesel and dual cycles

6

Calculate performance of internal combustion and gas turbine engines

6.1

P/V and out of phase engine indicator diagrams are analysed

6.2

Work, power, mean effective pressure and thermal efficiency of internal combustion engine cycles is calculated

6.3

Heat transfer to jacket cooling systems is calculated

6.4

Open and closed systems for gas turbines are outlined

6.5

Temperature/entropy diagrams are applied to illustrate gas turbine cycles

6.6

Power, isentropic efficiencies, thermal efficiency, work and fuel consumption for gas turbine cycles is calculated

6.7

Methods to increase efficiency of gas turbines are specified

6.8

Reheaters and intercoolers and how they improve efficiency is explained

7

Analyse air compressor performance

7.1

Compressor types are classified

7.2

Volumetric efficiency at free air conditions is explained

7.3

Work is calculated for isothermal and adiabatic compression, and effect of clearance for reciprocating compressor

7.4

Pressure ratio for compressor types is analysed

7.5

Problems are solved relating to multi-staging and intercooling

7.6

Heat transfer to air or cooling water from an air compressor is calculated

7.7

Formula to calculate work and efficiency of centrifugal compressors is derived

8

Analyse vapour compression refrigeration cycles

8.1

Design parameters for a vapour compression cycle are explained

8.2

Pressure/enthalpy diagram is prepared for a refrigeration cycle

8.3

Heat rejected, work done and coefficient of performance (COP) for a basic cycle is calculated

8.4

Effect of sub cooling and superheating is shown on a temperature/entropy diagram

8.5

COP is calculated with evaporators operating at two different pressures

9

Apply psychrometric principles to solve air conditioning problems

9.1

Comfort conditions for air conditioning systems are defined

9.2

Key parameters used in defining air condition are illustrated on a psychrometric chart

9.3

Cooling loads are calculated

9.4

Problems associated with air delivering and distribution methods are analysed

9.5

Methods of controlling noise and vibration in air conditioning systems are analysed

10

Analyse different methods of heat transfer

10.1

Heat flow through composite divisions is calculated

10.2

Insulation dimensions and interface temperatures are determined

10.3

Problems relating to radiated energy are solved by applying Stefan-Boltzmann Law

10.4

Problems in heat exchangers are solved by applying log mean temperature difference

10.5

Relative efficiency of contra-flow heat exchange is determined

Required Skills and Knowledge

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Calculate heat energy with and without phase change

1.1

Enthalpy is applied to heat mixture calculations with or without phase change

1.2

Enthalpy is applied to calculate resultant conditions of hot wells involving multiple returns

1.3

Steam conditions in a system when using throttling devices and separators are calculated

1.4

Entropy is distinguished from enthalpy

1.5

Entropy values are determined from standard tables

2

Analyse change of phase and state diagrams

2.1

Tables and/or diagrams are used to find enthalpy and entropy values for liquid, part liquid-part vapour and vapour states

2.2

Carnot cycle is outlined

2.3

Rankine cycle is outlined

2.4

Isentropic efficiency is explained

2.5

Problems are solved involving the efficiency of steam turbines operating in the Rankine cycle

3

Apply Dalton’s law of partial pressures to steam condensers

3.1

Dalton’s Law is applied to calculate air and condensate extraction from condensers

3.2

Problems are solved involving cooling water mass flow and cooling water pump work

4

Apply chemical equations for complete and incomplete combustion

4.1

Atomic and molecular weights and kilogram-mol are explained

4.2

Calorific value of a fuel is calculated by chemical formula

4.3

Mass of air required for stoichiometric combustion is calculated by gravimetric and volumetric analysis

4.4

Air fuel ratio is determined when supplied with composition of fuel and exhaust gas analysis

5

Apply gas laws to analyse internal combustion engine efficiencies

5.1

Universal gas constant form AVOGADRO S hypothesis is determined

5.2

Heat transfer is calculated for constant volume and constant pressure processes

5.3

First law of thermodynamics is applied to thermodynamic processes in a closed system

5.4

Second law of thermodynamics is applied to find thermal efficiency of Carnot cycle

5.5

Mathematical formula is applied to solve problems related to ideal constant volume air standard cycle

5.6

Mathematical formula is applied to solve problems related to diesel and dual cycles

6

Calculate performance of internal combustion and gas turbine engines

6.1

P/V and out of phase engine indicator diagrams are analysed

6.2

Work, power, mean effective pressure and thermal efficiency of internal combustion engine cycles is calculated

6.3

Heat transfer to jacket cooling systems is calculated

6.4

Open and closed systems for gas turbines are outlined

6.5

Temperature/entropy diagrams are applied to illustrate gas turbine cycles

6.6

Power, isentropic efficiencies, thermal efficiency, work and fuel consumption for gas turbine cycles is calculated

6.7

Methods to increase efficiency of gas turbines are specified

6.8

Reheaters and intercoolers and how they improve efficiency is explained

7

Analyse air compressor performance

7.1

Compressor types are classified

7.2

Volumetric efficiency at free air conditions is explained

7.3

Work is calculated for isothermal and adiabatic compression, and effect of clearance for reciprocating compressor

7.4

Pressure ratio for compressor types is analysed

7.5

Problems are solved relating to multi-staging and intercooling

7.6

Heat transfer to air or cooling water from an air compressor is calculated

7.7

Formula to calculate work and efficiency of centrifugal compressors is derived

8

Analyse vapour compression refrigeration cycles

8.1

Design parameters for a vapour compression cycle are explained

8.2

Pressure/enthalpy diagram is prepared for a refrigeration cycle

8.3

Heat rejected, work done and coefficient of performance (COP) for a basic cycle is calculated

8.4

Effect of sub cooling and superheating is shown on a temperature/entropy diagram

8.5

COP is calculated with evaporators operating at two different pressures

9

Apply psychrometric principles to solve air conditioning problems

9.1

Comfort conditions for air conditioning systems are defined

9.2

Key parameters used in defining air condition are illustrated on a psychrometric chart

9.3

Cooling loads are calculated

9.4

Problems associated with air delivering and distribution methods are analysed

9.5

Methods of controlling noise and vibration in air conditioning systems are analysed

10

Analyse different methods of heat transfer

10.1

Heat flow through composite divisions is calculated

10.2

Insulation dimensions and interface temperatures are determined

10.3

Problems relating to radiated energy are solved by applying Stefan-Boltzmann Law

10.4

Problems in heat exchangers are solved by applying log mean temperature difference

10.5

Relative efficiency of contra-flow heat exchange is determined

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

applying relevant work health and safety/occupational health and safety (WHS/OHS) requirements and work practices

assessing own work outcomes and maintaining knowledge of current codes, standards, regulations and industry practices

explaining advanced principles of marine engineering thermodynamics

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

identifying and interpreting numerical and graphical information, and performing advanced mathematical calculations related to marine engineering thermodynamics, such as calculation of power, isentropic efficiencies, thermal efficiency, work and fuel consumption for gas turbine cycles

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

imparting knowledge and ideas through verbal, written and visual means

using calculators to perform accurate, reliable and complex mathematical calculations

reading and interpreting written information needed to perform complex calculations related to marine 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, performance criteria and range of conditions and include knowledge of:

atomic and molecular weights and the kilogram-mol

Daltons Law of partial pressures

enthalpy

gas laws

gas turbines

heat transfer:

methods

principles

internal combustion engine cycles

Laws of Thermodynamics

noise and vibration control:

fundamentals of sound

noise and vibration problems

methods of control

operating cycle of reciprocating air compressors

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

principles of refrigeration

Rankine cycle

System International (SI) units

thermal efficiency calculations

WHS/OHS requirements and work practices.

Range Statement

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

Tables and/or diagrams include one or more of the following:

pressure–enthalpy

pressure–specific volume

specific enthalpy–specific entropy

temperature–pressure

temperature–specific enthalpy

temperature–specific entropy

Thermodynamic processes include one or more of the following:

adiabatic

isobaric

isochoric

isothermal

polytropic

Parameters include one or more of the following:

adiabatic saturation or constant enthalpy

humidifying or dehumidifying

latent heat

sensible heat

Methods include one or more of the following:

duct attenuators

duct lining

lined duct splitters

lined plenums

natural attenuation

sound absorbing materials/placement

vibration isolators

white noise