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Evidence Guide: UEENEEJ193A - Analyse the thermodynamic performance of HVAC/R systems

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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UEENEEJ193A - Analyse the thermodynamic performance of HVAC/R systems

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

Prepare to analyse the thermodynamic performance of HVAC/R systems

  1. OHS processes and procedures for a given work area are identified, identified, obtained and understood
  2. Established OHS risk control measures and procedures are followed in preparation for the work.
  3. The extent of the thermodynamic issues are determined from performance specifications and situation reports and in consultations with relevant persons
  4. Activities are planned to meet scheduled timelines in consultation with others involved in the work.
  5. Effective strategies are formed to ensure solution development and implementation is carried out efficiently.
OHS processes and procedures for a given work area are identified, identified, obtained and understood

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Established OHS risk control measures and procedures are followed in preparation for the work.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The extent of the thermodynamic issues are determined from performance specifications and situation reports and in consultations with relevant persons

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Activities are planned to meet scheduled timelines in consultation with others involved in the work.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Effective strategies are formed to ensure solution development and implementation is carried out efficiently.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Analyse the thermodynamic performance of HVAC/R systems

  1. OHS risk control measures and procedures for carrying out the work are followed.
  2. Knowledge of thermodynamic principles are applied to analytical solutions to refrigeration and air conditioning systems.
  3. Parameters, specifications and performance requirements in relation to refrigeration and air conditioning systems are obtained in accordance with established procedures.
  4. Approaches to analysing thermodynamic parameters are carried out to provide the most effective solution.
  5. Unplanned events are dealt with safely and effectively consistent with regulatory requirements and enterprise policy.
  6. Quality of work is monitored against personal performance agreement and/or established organizational or professional standards
OHS risk control measures and procedures for carrying out the work are followed.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Knowledge of thermodynamic principles are applied to analytical solutions to refrigeration and air conditioning systems.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Parameters, specifications and performance requirements in relation to refrigeration and air conditioning systems are obtained in accordance with established procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Approaches to analysing thermodynamic parameters are carried out to provide the most effective solution.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Unplanned events are dealt with safely and effectively consistent with regulatory requirements and enterprise policy.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Quality of work is monitored against personal performance agreement and/or established organizational or professional standards

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Document and report on the results of the thermodynamic performance analysis and actions taken.

  1. Solutions to thermodynamic issues are evaluated to determine their effectiveness and modified where necessary.
  2. Analysis is documented including details of all findings, calculations and assumptions.
  3. Analysis is reported to appropriately personnel to establish appropriate action to be taken based on findings.
  4. Justification for findings and any actions to be undertaken in relation to the equipment is documented for inclusion in work/project or development records in accordance with professional standards.
Solutions to thermodynamic issues are evaluated to determine their effectiveness and modified where necessary.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Analysis is documented including details of all findings, calculations and assumptions.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Analysis is reported to appropriately personnel to establish appropriate action to be taken based on findings.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Justification for findings and any actions to be undertaken in relation to the equipment is documented for inclusion in work/project or development records in accordance with professional standards.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

9) The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for this Training Package. .

The Evidence Guide forms an integral part of this Unit. It must be used in conjunction with all parts of this unit and performed in accordance with the Assessment Guidelines of this Training Package.

Overview of Assessment

9.1)

Longitudinal competency development approaches to assessment, such as Profiling, require data to be reliably gathered in a form that can be consistently interpreted over time. This approach is best utilised in Apprenticeship programs and reduces assessment intervention. It is the industry-preferred model for apprenticeships. However, where summative (or final) assessment is used it is to include the application of the competency in the normal work environment or, at a minimum, the application of the competency in a realistically simulated work environment. In some circumstances, assessment in part or full can occur outside the workplace. However, it must be in accordance with industry and regulatory policy.

Methods chosen for a particular assessment will be influenced by various factors. These include the extent of the assessment, the most effective locations for the assessment activities to take place, access to physical resources, additional safety measures that may be required and the critical nature of the competencies being assessed.

The critical safety nature of working with electricity, electrical equipment, gas or any other hazardous substance/material carries risk in deeming a person competent. Sources of evidence need to be 'rich' in nature to minimise error in judgment.

Activities associated with normal everyday work influence decisions about how/how much the data gathered will contribute to its 'richness'. Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised. These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments. Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package.

Critical aspects of evidence required to demonstrate competency in this unit

9.2)

Before the critical aspects of evidence are considered all prerequisites must be met.

Evidence for competence in this unit shall be considered holistically. Each Element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the 'Assessment Guidelines - UEE07 '. Evidence shall also comprise:

A representative body of work performance demonstrated within the timeframes typically expected of the discipline, work function and industrial environment. In particular this shall incorporate evidence that shows a candidate is able to:

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit. It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements.

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation, regulations, polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below:

Analyse the thermodynamic performance of HVAC/R systems as described in 8) and including:

A

Understanding the thermodynamic performance issues

B

Forming effective strategies for analysing refrigeration and air conditioning systems performance

C

Obtaining thermodynamic performance parameters, specifications and performance requirements appropriate to each situation.

D

Evaluating the results of the analysis

E

Documenting analysis details of all findings, calculations and assumptions.

F

Documenting justification of actions to be implemented in accordance with professional standards.

G

Dealing with unplanned events by drawing on essential knowledge and skills to provide appropriate solutions incorporated in the holistic assessment with the above listed items

Note:
Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed. In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified

Context of and specific resources for assessment

9.3)

This unit should be assessed as it relates to normal work practice using procedures, information and resources typical of a workplace. This should include:

OHS policy and work procedures and instructions.

Suitable work environment, facilities, equipment and materials to undertake actual work as prescribed by this unit.

These should be part of the formal learning/assessment environment.

Note:

Where simulation is considered a suitable strategy for assessment, conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy.

Evidence should show demonstrated competency in analysing the psychrometric and thermodynamic performance of HVAC/R systems.

Method of assessment

9.4)

This unit shall be assessed by methods given in Volume 1, Part 3 'Assessment Guidelines'.

Note:
Competent performance with inherent safe working practices is expected in the Industry to which this unit applies. This requires assessment in a structured environment which is intended primarily for learning/assessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit.

Concurrent assessment and relationship with other units

9.5)

There are no concurrent assessment recommendations for this unit.

Required Skills and Knowledge

7) This describes the essential skills and knowledge and their level, required for this unit.

Evidence shall show that knowledge has been acquired of safe working practices and analysing the thermodynamic performance of HVAC/R systems.

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies.

KS01-EJ193A Refrigeration systems

Evidence shall show an understanding of introduction to refrigeration systems, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects:

T1. Major components, type and functions:

evaporators

compressors

expansion devices

ancillary components

refrigerants

T2. System operation and performance:

thermodynamic properties of refrigerants

pressure enthalpy charts

refrigerant cycle

refrigerant cycle represented on pH charts

introduction to refrigerating effect, heat of compression, heat rejected on high side, co-efficient of performance, liquid sub-cooling suction superheating

effects on performance of changing operating pressures, liquid sub-cooling, suction superheating

T3. Application of refrigeration:

introduction to industrial refrigeration, specific system component types and refrigerants applied.

scope of commercial refrigeration, specific system component types and refrigerants applied

T4. Refrigerated enclosures and cabinets:

merchandising and display cabinets:

deep freeze meat

dairy

fruit and vegetable

multi-deck display

single deck

well type

island cases

glass door

reach door

reach in merchandisers

defrosting methods

cold rooms and freezer rooms

types and construction

insulation

vapour barrier

frost heave

interior fittings

location of equipment

defrosting methods

cold tracking

trace heating

storage conditions

temperature

relative humidity

air velocity

air patterns

load limits

KS02-EJ193A Air conditioning systems

Evidence shall show an understanding of introduction to air conditioning systems, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects:

T1. Occupational health requirements:

WH&S requirements

BCA requirements

AS1668 parts 1 & 2

AS3666

noise and vibration

air quality

sick building syndrome

T2. Operating requirements:

ventilation

air distribution

terminal velocity

temperature

relative humidity

air quality

noise

basic psychrometrics

T3. Operating modes

ventilation

evaporative cooling

ventilation and cooling

ventilation and heating

dehumidification

dehumidification

dehumidification and reheat

humidification

T4. Operating terminology/characteristics:

throw, drop

primary and secondary air

coanda effect

T5. HVAC system components and functions:

fans

ducting

registers

dampers

filters

cooling coils

heating coils

induction units

fan coil units

terminal units

humidifiers, pumps and sprayers

hydronic systems and components

T6. Applications and construction of air conditioning systems:

applications

residential, commercial, low and high rise, industrial ventilation and air conditioning

packaged plant

RACs, split systems (wall and floor console, ceiling fan coil), wall facia, roof top, reverse cycle option central station plant

all air systems, constant volume variable temperature, constant temperature variable volume, air/water systems

all water system, multi-zoning, thermal storage systems

basic air conditioning system diagrams

duct layout

hydronic layout

unit/conditioner drawings

T7. HVAC control systems:

basic principles

terminology

symbols and diagrams

basic applications

Range Statement

8) This relates to the unit as a whole providing the range of contexts and conditions to which the performance criteria apply. It allows for different work environments and situations that will affect performance.

This unit must be demonstrated in relation to analysing thermodynamic parameters in at least two different refrigeration and air conditioning systems.

Generic terms used throughout this Vocational Standard shall be regarded as part of the Range Statement in which competency is demonstrated. The definition of these and other terms that apply are given in Volume 2, Part 2.1.