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Evidence Guide: MEM23139A - Design a basic single zone duct distribution system

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

 

MEM23139A - Design a basic single zone duct distribution system

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

Determine design specification for basic single zone duct distribution system

  1. Obtain and implement work health and safety (WHS) and environmental requirements for a given work area
  2. Determine design requirements for the single zone duct distribution system from customer requirements, job specifications, and briefings or discussions with appropriate personnel
  3. Identify and interpret relevant codes and standards
  4. Prepare final specifications for the design and obtain relevant approvals
  5. Identify sources of professional and technical assistance
  6. Establish coordination and contingency management requirements of design work with other HVAC/R and building systems team members
  7. Obtain resources required for the design task in accordance with enterprise procedures
Obtain and implement work health and safety (WHS) and environmental requirements for a given work area

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine design requirements for the single zone duct distribution system from customer requirements, job specifications, and briefings or discussions with appropriate personnel

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify and interpret relevant codes and standards

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare final specifications for the design and obtain relevant approvals

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify sources of professional and technical assistance

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Establish coordination and contingency management requirements of design work with other HVAC/R and building systems team members

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Obtain resources required for the design task in accordance with enterprise procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

A person who demonstrates competency in this unit must be able to design basic single zone duct distribution systems to meet customer requirements, including cost specifications, and WHS and other regulatory requirements.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors must be satisfied that the candidate can competently and consistently:

implement WHS workplace procedures and practices, including risk control measures

design basic single zone duct distribution systems to customer performance and cost requirements

select and size appropriate components, including fans and duct work

communicate technical requirements to others, including preparation of required drawings, CAD files and reports.

Context of and specific resources for assessment

This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations.

The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.

Method of assessment

Assessment must satisfy the endorsed Assessment Guidelines of the MEM05 Metal and Engineering Training Package.

Assessment methods must confirm consistency and accuracy of performance (over time and in a range of workplace relevant contexts) together with application of underpinning knowledge.

Assessment methods must be by direct observation of tasks and include questioning on underpinning knowledge to ensure correct interpretation and application.

Assessment may be applied under project-related conditions (real or simulated) and require evidence of process.

Assessment must confirm a reasonable inference that competency is not only able to be satisfied under the particular circumstance, but is able to be transferred to other circumstances.

Assessment may be in conjunction with assessment of other units of competency where required.

Guidance information for assessment

Assessment processes and techniques must be culturally appropriate and appropriate to the language and literacy capacity of the candidate and the work being performed.

Required Skills and Knowledge

Required skills

Required skills include:

selecting air-diffusion

sizing the system

selecting fans

designing duct work

applying cost controlling strategies

using 3-D CAD systems effectively

interpreting drawings and specifications

communicating effectively with others

working in teams with others

communicating technical and procedural requirements to others

dealing effectively with unexpected situations

Required knowledge

Required knowledge includes:

differentiation between static, velocity and total pressure in air distribution ducts

laminar and turbulent flow

use of Moody diagram for flow rate and pressure drop

friction and dynamic pressure loss

Colebook-White formula

sources of heat and pressure leakage and loss calculation

noise minimisation

fan laws

control cost parameters

duct design parameters, including:

standard duct sizes and gauges

available access and space

system performance requirements

system sizing and balancing methods

dual and single duct constant volume air systems

variable volume air system

multi-zone systems

Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

WHS requirements

WHS requirements include:

relevant legislation

protective equipment

material safety management systems, including use of material safety data sheets (MSDS)

hazardous substances and dangerous goods code

local safe operation procedures

WHS provisions in relevant awards and agreements

Environmental requirements

Environmental requirements include:

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

Single zone duct distribution system

A single zone duct distribution system is a basic central system which can supply a constant air volume or a variable air volume at low, medium or high pressure through a single duct

Appropriate personnel

Appropriate personnel may include:

supervisor

leading hand

foreman

manager

engineer

technician

trainer

mentor

team member

customer

client

Enterprise procedures

Enterprise procedures may include:

use of tools and equipment

operating instructions, including job sheets, plans, drawings and designs

reporting and communication

manufacturer specifications

site operational procedures

references to industry standards

Resources

Resources may include:

reference manuals

scientific calculator

3-D CAD software

computer workstation and software, either stand alone or networked

test apparatus

appropriate tools of trade, equipment and materials

standard duct sizes and gauges

Contingencies and unexpected situations

Contingencies and unexpected situations that arise during the course of the design process may include:

cost or time overruns

unavailability of required components

changes in customer requirements after design process has started

regulatory change

site or building features not on plans or drawings

other situations not included in customer brief or normal enterprise procedures