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Evidence Guide: UEENEEJ129A - Establish heat loads for commercial refrigeration and/or air conditioning applications

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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UEENEEJ129A - Establish heat loads for commercial refrigeration and/or air conditioning applications

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

Prepare to determine the heat loads for commercial refrigeration and/or air conditioning applications.

  1. OHS procedures for a given work area are identified, obtained and understood
  2. Established OHS risk control measures and procedures are followed in preparation for the work
  3. The extent of the heat load analysis is determined from project specifications and discussion with appropriate personnel
  4. Activities are planned to meet scheduled timelines in consultation with others involved in the work
  5. Effective strategies are determined to ensure solution development and implementation is carried out efficiently
OHS procedures for a given work area are 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 heat load analysis is determined from project specifications and discussion with appropriate personnel

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 determined to ensure solution development and implementation is carried out efficiently

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine the heat loads for commercial refrigeration and/or air conditioning applications.

  1. OHS risk control measures and procedures for carrying out the work are followed.
  2. Knowledge of commercial refrigeration and/or air conditioning system operating parameters is applied when performing heat loads estimation
  3. Parameters, specifications and performance requirements in relation to commercial refrigeration and/or air conditioning system are set in accordance with established procedures
  4. Approaches to determine the heat loads are carried out to provide most effective solutions
  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 organisational or professional standards
OHS risk control measures and procedures for carrying out the work are followed.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Knowledge of commercial refrigeration and/or air conditioning system operating parameters is applied when performing heat loads estimation

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Parameters, specifications and performance requirements in relation to commercial refrigeration and/or air conditioning system are set in accordance with established procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Approaches to determine the heat loads are carried out to provide most effective solutions

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 organisational or professional standards

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete and report heat loads for commercial refrigeration and /or air conditioning applications.

  1. Heat load estimations is documented including details of all findings, calculations and assumptions
  2. Completed heat loads are submitted to an appropriate person to be checked for accuracy and compliance with project specifications and evaluated to determine whether performance requirements are met
  3. Heat loads estimation is reported to appropriately personnel to establish appropriate action to be taken based on findings
  4. Quality of work is monitored against personal performance agreement and/or established organizational or professional standards
Heat load estimations is documented including details of all findings, calculations and assumptions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Completed heat loads are submitted to an appropriate person to be checked for accuracy and compliance with project specifications and evaluated to determine whether performance requirements are met

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Heat loads estimation is reported to appropriately personnel to establish appropriate action to be taken based on findings

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Determine the heat loads for commercial refrigeration and/or air conditioning applications as described in 8) and including:

A

Establishing system parameters for heat load

B

Select appropriate head load calculation tools

C

Identifying heat loads accurately

D

Using calculation methods accurately

E

Documenting heat loads correctly

F

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 determining the heat loads for commercial refrigeration and air conditioning applications.

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 determining the heat loads for commercial refrigeration and/or air conditioning applications.

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

KS01-EJ129A Commercial refrigeration heat load estimating

Evidence shall show an understanding of heat load estimating for commercial refrigeration applications, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects:

T1. Heat transfer

factors affecting heat transfer

insulation material characteristics

vapour barriers (seals)

ambient conditions

composite walls (heat flows)

types of common insulation

thermal conductivity

film factors

T2. Cabinet construction and design

deep freeze case

meat case

dairy case

fruit and vegetable case

drink cabinets

T3. Air change load

room volumes

room usage (average, medium, heavy)

heat removed from cooling air to refrigerated conditions

air curtains

temperature differences

door opening sizes

Tamm’s equation

T4. Product load

sensible heat

latent heat

heat of respiration

storage temperatures

unit running times

humidity

air flows

stacking of products

freeze, chill, thaw times

T5. Total freezer/cool room loads

wall load

air change load

product load

miscellaneous

total load, safety factor and unit running times

floor loads in cool rooms

door opening loads (ASHRAE & RADS methods)

door opening loads (for trucks)

T6. Process cooling loads

cooling chemical reactions

energy balance methods

sensible & latent cooling of gases

sensible & latent cooling of water vapour in gas streams

T7. Computer programs

KS02-EJ129A Commercial air conditioning heat load estimating

Evidence shall show an understanding of heat load estimating for commercial air conditioning applications, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects:

T1. Heat flow in buildings

conduction

convection

radiation

heat paths

T2. Thermal storage

T3. Different methods of calculations

ASHRAE

Carrier

finite difference

T4. U Values.

T5. Film coefficients.

T6. Solar heat

direct

diffuse

sol air temperature

sun position calculations

T7. Design conditions

outdoor

monthly/daily corrections

comfort/critical

indoor

effective temperature

T8. Thermal comfort.

T9. Space characteristics.

T10. Equipment location.

T11. Zoning

T12. Internal loads

lighting

equipment

people

load profiles

internal partitions

T13. Fresh air/AS 1668

T14. Calculation of fabric loads

walls

roofs

floors

T15. Windows

glass types and factors

shade factors

internal and external shading

shading from adjacent structures

T16. Air quantity calculation

psychrometrics

by-pass factor

coil load

VAV air quantities

T17. Piping and other losses.

T18. Refrigeration plant load.

T19. Computer software

responsible use

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 determining heat loads using quick selection short form paper and/or computer based methods for a refrigeration and/or air conditioning system.

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.