MEM23129 — Evaluate thermal loads for heating, ventilation, air conditioning and refrigeration

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What an assessment for MEM23129 must cover

82 assessable components: 4 elements (24 performance criteria), 9 performance evidence and 49 knowledge evidence requirements. An audit-defensible tool maps every question and task back to these — that mapping is the coverage matrix Auditori generates alongside the assessment.

Elements & performance criteria

1 Determine scope of evaluation of thermal loads and HVACR systems

1.1Establish type, location and scope of HVACR systems, building and refrigerated enclosures from plans, data sheets, specifications and site inspections
1.2Identify stakeholders to be consulted during evaluation
1.3Establish software and software techniques required for evaluation analysis
1.4Determine WHS, regulatory and environmental requirements relevant to evaluation
1.5Investigate sustainability implications of HVACR and building management systems

2 Prepare for thermal loads and HVACR systems evaluation

2.1Review thermal load analysis techniques for multiple zone commercial or industrial buildings, including use of tabulations and computer software
2.2Identify sources of heat gains for building
2.3Review room sensible and latent heat, including peak values
2.4Review thermal load analysis techniques for commercial refrigeration systems, including use of tabulations and computer software
2.5Identify heat load sources for refrigerated enclosures or zones
2.6Determine tools, equipment, testing devices and materials required for evaluation
2.7Determine required measurements and measurement techniques
2.8Calibrate, set up, and test measurement equipment and procedures
2.9Identify appropriate analysis techniques, analysis and simulation software and software validation techniques

3 Evaluate thermal loads and HVACR systems

3.1Evaluate thermal load for a commercial refrigeration system
3.2Evaluate thermal load for a multiple zone commercial or industrial building
3.3Evaluate the effects of internal and external parameter changes on refrigeration system performance
3.4Evaluate thermal performance of a building and options for design improvements
3.5Evaluate building to identify and mitigate high thermal loads
3.6Evaluate performance of refrigeration and air conditioning system against specifications and determine optimum operational settings
3.7Evaluate equipment size, including coil and air handling unit capacities for constant and variable volume systems, and central refrigeration and boiler capacities
3.8Evaluate and validate software for refrigeration and building thermal performance analysis and system simulation

4 Report results

4.1Record results of evaluation, including recommendations for design and system setting optimisation
4.2Provide documentation that includes written and visual details of processes and results

Performance evidence

determining heating, ventilation, air conditioning and refrigeration (HVACR) system parameters from plans, specifications and site inspections
investigating sustainability implications of HVACR systems
identifying relevant thermodynamic principles and techniques for HVACR system thermal load evaluations
reviewing features and functions of HVACR systems and components
testing and measuring HVACR systems and component performance parameters on at least two occasions
evaluating system and component performance with tabulated and software generated data on at least two occasions
applying and validating software for analysis and simulation
reporting and documenting processes, results and recommendations
Note: Where a volume and/or frequency is not specified, demonstration must be provided at least once.

Knowledge evidence

work health and safety (WHS) and regulatory requirements, codes of practice, standards, risk management and registration requirements
sources of professional and technical assistance
current options and trends in performance analysis software, including underpinning program techniques
thermal load measuring equipment and test apparatus
sustainability implications of HVACR systems, including consideration of energy sources and energy efficiency
thermodynamic principles required by thermal loading analysis and HVACR management systems
thermodynamic concepts related to HVACR including: properties, process and state
thermodynamic concepts related to HVACR including: mass, conservation of mass, specific volume and density, specific volume, relative density, force, weight, pressure, temperature, Zeroth law, absolute scales and International System of Units (SI) units
thermodynamic concepts related to HVACR including: systems, cycles and steady state
thermodynamic concepts related to HVACR including: energy forms
thermodynamic concepts related to HVACR including: effects of heating of solids and liquids
heat transfer, conduction, convection and radiation including: property tables for conductivity, convection and radiation coefficients
heat transfer, conduction, convection and radiation including: Fourier law of conduction and conductivity of materials
convection including: mechanism of convection
convection including: convection heat transfer coefficient and factors affecting the coefficient
convection including: fluid flow characteristics including geometry of convection surfaces, natural and forced convection and flow regime
convection including: units, kinematic viscosity and dynamic viscosity
convection including: convective heat transfer coefficients for conduit and annular flow and hydraulic diameter
heat exchangers including types, efficiency and measurements
radiators including: emission, absorption and reflection (properties and measurements)
radiators including: Wien’s displacement law
radiators including: Kirchhoff’s law
radiators including: solar energy, heating and power generation
radiators including: radiant energy on surfaces
radiators including: variations including Azimuth and zenith angles, path length, cloud cover and water vapour, and shade factors for windows
combined heat transfer
conduction plus convection, including heat exchangers using air and water as transfer mediums
conduction, convection and radiation (qualitative)
cooling fins
heat flow, electrical analogy, graphical solution techniques and qualitative understanding of numerical methods
vapour-compression refrigeration including: vapour-compression cycle for refrigeration
vapour-compression refrigeration including: system components, including throttling valves and capillary tubes as throttling devices
vapour-compression refrigeration including: performance criteria for refrigeration system evaluation
vapour-compression refrigeration including: types of refrigerants
refrigerant properties and pH diagrams including: ideal vapour compression cycle on the pH diagram
refrigerant properties and pH diagrams including: energy balance and heat transfers in compressor, evaporator and condenser
refrigerant properties and pH diagrams including: variation of actual cycles from the ideal
refrigerant properties and pH diagrams including: vapour-compression cycle with suction superheating, liquid sub-cooling and pressure drop in system components
mechanical components of vapour compression including refrigeration and HVAC systems
refrigeration enclosures, cabinets, cold rooms and freezer rooms
factors affecting refrigeration heat transfer
building thermal performance survey procedures
factors affecting building heat gains
standard thermal values in relation to a commercial or industrial building
equipment size for constant and variable volume systems and central refrigeration and boiler capacities
thermal properties of buildings and building materials
people loads, occupant comfort and safety factors
cost implications of air conditioning and heating designs
heat loads and thermal lag.

Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.

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Questions about assessing MEM23129

What does an assessment tool for MEM23129 need to cover?

To satisfy the Principles of Assessment and Rules of Evidence, an assessment for MEM23129 needs to address all 82 unit components: 4 elements with 24 performance criteria, 9 performance evidence requirements, 49 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.

How does Auditori generate an assessment tool for MEM23129?

Auditori pulls the current release of MEM23129 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.

Is the first assessment tool really free?

Yes. Every new account includes one free credit — enough to generate the complete assessment tool for MEM23129 — with no card and no subscription required. After that it's pay-as-you-go per unit.

Can I check my existing MEM23129 assessment instead of generating a new one?

Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of MEM23129, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.

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