Unit of competency details
MEM23142 - Determine psychrometric processes and system performance (Release 1)
Summary
Usage recommendation:
Current
Releases:
| 1 1 (this release) |
19/Dec/2022 |
Companion volumes:
Unit of competency
Assessment requirements
Training packages that include this unit
Qualifications that include this unit
Classifications
Classification history
| ASCED Module/Unit of Competency Field of Education Identifier | 030703 | Industrial Engineering | 19/Dec/2022 | |
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Unit of competency
Modification History
Release 1. Supersedes and is equivalent to MEM23142A Determine psychrometric processes and system performance.
Application
This unit of competency defines the skills and knowledge required to identify psychrometric processes and determine system performance in a commercial building. It applies to those in organisations designing, manufacturing, installing, servicing or maintaining heating, ventilation, air conditioning and refrigeration (HVACR) equipment.
It is suitable for people working as supervisors, technicians and HVACR draftspersons, and for those pursuing manufacturing engineering or related technical qualifications and careers.
No licensing, legislative or certification requirements apply to this unit at the time of publication.
Pre-requisite Unit
MEM23004 Apply technical mathematics
MEM23006 Apply fluid and thermodynamics principles in engineering
Competency Field
Engineering science
Elements and Performance Criteria
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Elements
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Performance Criteria
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Elements describe the essential outcomes.
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Performance criteria describe the performance needed to demonstrate achievement of the element.
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1. Review psychrometric processes
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1.1 Obtain and implement work health and safety (WHS) and environmental requirements for the work area
1.2 Apply knowledge of psychrometric processes to analytical solutions to HVACR systems in accordance with organisational procedures
1.3 Diagnose air temperature and humidity problems using psychrometric charts
1.4 Consult appropriate personnel to ensure that work is coordinated effectively with others
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2. Analyse the psychrometric and system performance of HVACR systems
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2.1 Determine plant or system capacity and airflow requirements for effects of coil bypass factor, apparatus dew point (ADP) and partial load control
2.2 Calculate dehumidified air quantity using both target superheat (TSH) and effective room sensible heat (ERSH) methods
2.3 Establish plant capacity and air flow rates for the system and/or building
2.4 Establish airside systems and determine system performance
2.5 Determine systemic performance parameters
2.6 Consult on any contingencies and unexpected situations and take appropriate action based on specifications, codes and standards, and organisational procedures
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3. Document and report on psychrometric and HVACR system performance
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3.1 Evaluate solutions to psychrometric and system performance to determine their effectiveness
3.2 Report and document analysis in accordance with organisational procedures, incorporating details of all findings, calculations and assumptions
3.3 Prepare and justify recommendations for any required actions in relation to HVACR equipment
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Foundation Skills
This section describes those language, literacy, numeracy and employment skills that are essential to performance.
Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.
Range of Conditions
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This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.
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WHS requirements include:
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- legislation
- protective equipment
- material safety management systems
- hazardous substances and dangerous goods code
- local safe operation procedures
- awards provisions.
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Environmental requirements include:
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- relevant legislation, regulations and codes
- correct handling and disposal of liquid and solid waste
- elimination or minimisation of gas, fume, vapour and smoke emissions, including fugitive emissions
- dust elimination, minimisation and control
- minimisation of energy and water use
- elimination or control of excessive noise
- use and recycling of refrigerants.
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Appropriate personnel include:
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- supervisor, leading hand, foreman or manager
- engineer
- technician
- trainer or mentor
- team member
- customer.
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Systemic performance parameters include:
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- coil characteristics
- spray processes.
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Organisational procedures include:
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- use of tools and equipment
- instructions, including job sheets, plans, drawings and designs
- reporting and communication
- manufacturer specifications
- operational procedures
- industry standards.
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Unit Mapping Information
Release 1. Supersedes and is equivalent to MEM23142A Determine psychrometric processes and system performance.
Links
Companion Volume Implementation Guides are available on VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b7050d37-5fd0-4740-8f7d-3b7a49c10bb2
Assessment requirements
Modification History
Release 1. Supersedes and is equivalent to MEM23142A Determine psychrometric processes and system performance.
Performance Evidence
Evidence required to demonstrate competence in this unit must be relevant to and satisfy the requirements of the elements and performance criteria and include:
- interpreting drawings and specifications
- implementing work health and safety (WHS) procedures and practices including the use of risk control measures
- determining psychrometric processes and system performance
- plotting the psychrometric performance of a heating, ventilation and air conditioning and refrigeration (HVACR) coil on at least two occasions
- determining the plant capacity and airflow rates for a building on at least two occasions
- determining system performance
- calculating the following:
- psychrometric performance of the coil
- psychrometric performance of HVACR spray equipment
- required plant capacity and airflow rates
- communicating technical and procedural requirements to others
- dealing with unexpected situations.
Note: Where a volume and/or frequency is not specified, demonstration must be provided at least once.
Knowledge Evidence
Evidence required to demonstrate the required knowledge for this unit must be relevant to and satisfy the requirements of the elements and performance criteria and include knowledge of:
- WHS considerations
- appropriate personnel
- systemic performance parameters
- adiabatic and evaporative cooling
- isothermal humidification
- cooling and dehumidification with high latent load
- cooling and dehumidification with all outdoor air
- cooling and dehumidification with all outdoor air and with dehumidified air requirements less than supply air
- cooling with evaporative humidification
- spray processes including cooling and dehumidification, cooling and humidification with heated spray water, heating and humidification including:
- partial load processes
- reheat
- bypass of return air and mix of return air and outside air including:
- variable air volume
- variable coil effective surface temperature
- analysis of cooling coil selection and performance
- psychrometric analyses, formulae and charts
- indirect evaporative coolers
- analysis of cooling coil selection and performance
- systemic performance parameters
- cooling tower characteristics
- environmental considerations
Assessment Conditions
- have vocational competency determining psychrometric processes and system performance at least to the level being assessed with relevant industry knowledge and experience
- satisfy the assessor requirements in the Standards for Registered Training Organisations 2015 or its replacement and comply with the National Vocational Education and Training Regulator Act 2011, its replacementor equivalent legislation covering VET regulation in a non-referring state/territory as the case requires.
- Where possible assessment must occur in operational workplace situations. Where this is not possible or where personal safety or environmental damage are limiting factors, assessment must occur in a sufficiently rigorous simulated environment that reflects realistic operational workplace conditions that cover all aspects of workplace performance, including environment, task skills, task management skills, contingency management skills and job role environment skills.
- Conditions for assessment must include access to all tools, equipment, materials and documentation required including relevant workplace procedures, product and manufacturing specifications.
- Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.
Links
Companion Volume Implementation Guides are available on VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b7050d37-5fd0-4740-8f7d-3b7a49c10bb2
