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Evidence Guide: UEERA0034 - 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!

From the Wiki University

 

UEERA0034 - 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 heat loads for commercial refrigeration and/or air conditioning applications

  1. Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are identified and applied
Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are identified and applied

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

WHS/OHS risk control measures and workplace procedures are followed in preparation for commercial refrigeration/air conditioning work

Completed
Date:

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Extent of heat load analysis is determined from project specifications and discussions with appropriate person/s

Completed
Date:

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Activities are planned to meet scheduled timelines in consultation with other person/s involved in commercial refrigeration/air conditioning work

Completed
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Effective strategies are determined to ensure solution development and implementation is carried out efficiently in accordance with workplace procedures

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

  1. WHS/OHS risk control measures and workplace procedures for carrying out commercial refrigeration/air conditioning work is followed
WHS/OHS risk control measures and workplace procedures for carrying out commercial refrigeration/air conditioning work is followed

Completed
Date:

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Specifications of commercial refrigeration and/or air conditioning system operating parameters are applied when performing heat load estimations

Completed
Date:

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

Completed
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Appropriate approaches to determine the heat loads are carried out to provide most effective solutions

Completed
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Unplanned events are dealt with safely and effectively consistent with regulatory requirements and workplace procedures in a manner that minimises risk to personnel and equipment

Completed
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Work quality is monitored in accordance with performance agreement and/or workplace or industry standards

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

  1. Heat load estimations are documented, including details of findings, calculations and assumptions, in accordance with workplace procedures
Heat load estimations are documented, including details of findings, calculations and assumptions, in accordance with workplace procedures

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

Completed
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Heat load estimations are reported to relevant person/s to determine appropriate action to be taken based on findings

Completed
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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include:

establishing system parameters for heat load

selecting appropriate head load calculation tools

identifying heat loads accurately

using calculation methods accurately

documenting heat loads correctly

dealing with unplanned events

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures and practices requirements, including using risk control measures

applying sustainable energy principles and practices

determining heat loads for commercial refrigeration and air conditioning applications

planning to determine heat loads for commercial refrigeration/air conditioning applications.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

commercial refrigeration heat load estimating commercial refrigeration applications, safe working practices and relevant standards, codes and regulations, including:

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

cabinet construction and design:

deep freeze case

meat case

dairy case

fruit and vegetable case

drink cabinets

air change load:

room volumes

room usage (average, medium and heavy)

heat removed from cooling air to refrigerated conditions

air curtains

temperature differences

door opening sizes

Tamm’s equation

product load:

sensible heat

latent heat

heat of respiration

storage temperatures

unit running times

humidity

air flows

stacking of products

freeze, chill and thaw times

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 and RADS methods)

door opening loads (for trucks)

process cooling loads

cooling chemical reactions

energy balance methods

sensible and latent cooling of gases

sensible and latent cooling of water vapour in gas streams

computer programs

commercial air conditioning heat load estimating

heat load estimating for commercial air conditioning applications, safe working practices and relevant standards, codes and regulations, including:

heat flow in buildings:

conduction

convection

radiation

heat paths

thermal storage

different methods of calculations:

ASHRAE

carrier

finite difference

U values

film coefficients

solar heat:

direct

diffuse

sol air temperature

sun position calculations

design conditions:

outdoor

monthly/daily corrections

comfort/critical

indoor

effective temperature

thermal comfort

space characteristics

equipment location

zoning

internal loads:

lighting

equipment

people

load profiles

internal partitions

fresh air/AS 1668 The use of ventilation and air conditioning in buildings

calculation of fabric loads:

walls

roofs

floors

windows:

glass types and factors

shade factors

internal and external shading

shading from adjacent structures

air quantity calculation:

psychrometrics

by-pass factor

coil load

variable air volume (VAV) air quantities

piping and other losses

refrigeration plant load

computer software:

responsible use

relevant commercial refrigeration and air conditioning manufacturer specifications

relevant job safety assessments or risk mitigation processes

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace policies and procedures.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

Determining heat loads for commercial refrigeration and/or air conditioning applications must include at least the following:

one quick selection short-form paper and/or one computer-based method for a refrigeration and/or air conditioning system