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Evidence Guide: MARL6006A - 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!

From the Wiki University

 

MARL6006A - 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
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Steam conditions in a system when using throttling devices and separators are calculated

Completed
Date:

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Entropy is distinguished from enthalpy

Completed
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Entropy values are determined from standard tables

Completed
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Analyse change of phase and state diagrams

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Carnot cycle is outlined

Completed
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Rankine cycle is outlined

Completed
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Isentropic efficiency is explained

Completed
Date:

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

Completed
Date:

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

Completed
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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:

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

Completed
Date:

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

Completed
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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:

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

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

Completed
Date:

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

Completed
Date:

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

Completed
Date:

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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:

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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:

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

Completed
Date:

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Pressure ratio for compressor types is analysed

Completed
Date:

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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:

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Formula to calculate work and efficiency of centrifugal compressors is derived

Completed
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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:

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Pressure/enthalpy diagram is prepared for a refrigeration cycle

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

Completed
Date:

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

Completed
Date:

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COP is calculated with evaporators operating at two different pressures

Completed
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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:

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

Completed
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Cooling loads are calculated

Completed
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Problems associated with air delivering and distribution methods are analysed

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

Completed
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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:

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

Completed
Date:

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

Completed
Date:

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Relative efficiency of contra-flow heat exchange is determined

Completed
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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

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 advanced principles of marine engineering thermodynamics can be applied

diagrams, specifications and other information required for performing advanced calculations related to marine engineering thermodynamics

technical reference library with current publications on 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 advanced 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.

Required Skills and Knowledge

Required Skills:

Assess own work outcomes and maintain knowledge of current codes, standards, regulations and industry practices

Explain advanced principles of marine engineering thermodynamics

Identify and apply relevant mathematical formulas and techniques to solve advanced problems related to marine engineering thermodynamics

Identify and interpret numerical and graphical information, and perform 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

Identify, collate and process information required to perform advanced calculations related to marine engineering thermodynamics

Impart knowledge and ideas through verbal, written and visual means

Read and interpret written information needed to perform complex calculations related to marine engineering thermodynamics

Use calculators to perform complex mathematical calculations

Required Knowledge:

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

Thermodynamic principles

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

Range Statement

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.

Tables and/or diagrams may include:

Pressure–enthalpy

Pressure–specific volume

Specific enthalpy–specific entropy

Temperature–pressure

Temperature–specific enthalpy

Temperature–specific entropy

Thermodynamic processes may include:

Adiabatic

Isobaric

Isochoric

Isothermal

Polytropic

Parameters may include:

Adiabatic saturation or constant enthalpy

Humidifying or dehumidifying and

Latent heat

Sensible heat

Methods may include:

Duct attenuators

Duct lining

Lined duct splitters

Lined plenums

Natural attenuation

Sound absorbing materials/placement

Vibration isolators

White noise