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Evidence Guide: UEERA0004 - Analyse vibration and noise in refrigeration and air conditioning 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!

From the Wiki University

 

UEERA0004 - Analyse vibration and noise in refrigeration and air conditioning systems

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

Prepare refrigeration and air conditioning system to analyse noise and vibration in

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

Completed
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WHS/OHS risk control measures and workplace procedures are followed

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Extent of the noise and vibration issue is determined from performance specifications, situation reports and consultations with relevant person/s

Completed
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Work activities are planned to meet scheduled timelines in consultation with others involved in the work

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

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Analyse refrigeration and air conditioning system noise and vibration

  1. WHS/OHS risk control measures and workplace procedures for carrying out the work are followed
WHS/OHS risk control measures and workplace procedures for carrying out the work are followed

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Noise, vibration and thermodynamic analytical solutions are applied to refrigeration and air conditioning system

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Parameters, specifications and performance requirements in relation to refrigeration and air conditioning system are obtained in accordance with workplace procedures

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Approaches to analysing noise and vibration parameters are carried out to provide the most effective solution

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

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Refrigeration and air conditioning system work quality is monitored against performance agreement and/or workplace or industry standards

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Document actions taken and report on noise and vibration analysis

  1. Solutions to noise and vibration issues are evaluated to determine their effectiveness and modified, as required, in accordance with workplace procedures
Solutions to noise and vibration issues are evaluated to determine their effectiveness and modified, as required, in accordance with workplace procedures

Completed
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Refrigeration and air conditioning system analysis is documented and includes details of findings calculations and assumptions

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Refrigeration and air conditioning system analysis is reported to appropriate person/s to determine appropriate action to be taken based on findings

Completed
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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 industry standards and workplace procedures

Completed
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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

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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:

understanding the noise and vibration issues

forming effective strategies for analysing refrigeration and air conditioning systems performance

obtaining noise and vibration parameters, specifications and performance requirements appropriate to each situation

evaluating the results of the analysis

documenting analysis details of all findings, calculations and assumptions

documenting justification of actions to be implemented in accordance with professional standards

dealing with unplanned events

applying problem-solving procedures, including using appropriate theorems

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

applying sustainable energy principles and practices.

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:

noise and vibration in refrigeration and air conditioning systems, safe working practices and relevant standards, codes and regulations, including:

fundamentals of sound:

frequency

decibels

octave bands

direct sound

velocity

sound pressure level

sound power level

sound meters

noise and people:

physical measurement of sound

weighting networks

NR curves

noise damage to hearing

evaluate daily noise exposures

peak noise levels

attenuation for hearing protectors

excess noise levels permissible

noise abatement Acts

advanced noise and vibration control

sound in confined and unconfined spaces:

inverse square laws

direct and reflective sound

reverberation time

Sabine's formula

absorption coefficients of surfaces

types of absorbers and their operation

insulation performances of partitions

identification and analysis of problems:

one-dimensional sound waves

standing waves

energy in a sound wave

sources

effects of air turbulence

transmitters

amplifiers

absorptivity

reflectivity

room characteristics

acoustic design in buildings

fan and air noise transmission in ducts

methods of control:

natural attenuation

sound absorbing materials and placement

duct lining

lined plenums

lined duct splitters

duct attenuators

white noise

vibration isolators

acoustic specifications:

attenuator ratings

sound insulation:

plant room breakout

controlling plant room noise

duct borne noise:

sound power spectra for fans

noise attenuation in ducts and fittings

reducing fan noise transmission

regeneration noise

sources of regenerated noise

use tables to estimate regenerative noises

breakout situations

fan noise breakout

list methods of controlling breakout

controlling the cost:

economical use of attenuation

vibration:

simple harmonic motion (SHM)

period

frequency

amplitude

estimate frequencies for fans, pumps and refrigeration plant

estimate transmission of vibration

vibration control for building structures

use transmissibility graphs to select springs, vibration eliminators and pads

types of isolation materials and mounting devices

select isolation and mounting devices

inertia blocks

noise and vibration analysis computer software packages

relevant job safety assessments or risk mitigation processes

relevant technique, process or measurement methods to obtain sound, noise and vibration data, including problem-solving procedures and appropriate theorems

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.

Analysing noise, sounds and vibration must include at least the following:

two different refrigeration and air conditioning systems