This unit involves the skills and knowledge required to develop heat exchanger design specifications.

It includes working safely, applying refrigeration parameters, gathering and analysing data, and developing and documenting results and solutions for work/project and/or development records.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare to develop specifications for exchanger designs

1.1

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

1.2

WHS/OHS risk control measures and procedures are followed in preparation for the work

1.3

Scope of analysis to develop specifications is determined from design brief, relevant reports and/or consultations with relevant person/s

1.4

Activities are planned in accordance with workplace procedures for timelines in consultation with others involved in the work

1.5

Strategies are formed to ensure analysis is carried out in accordance with workplace procedures and relevant industry standards

2

Develop specifications for exchanger designs

2.1

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

2.2

Relevant refrigeration parameters are applied to developing heat exchanger specifications in accordance with workplace procedures and relevant industry standards

2.3

Parameters and performance requirements in relation to refrigeration systems are obtained in accordance with workplace procedures and relevant industry standards

2.4

Refrigeration parameters are analysed to provide effective solutions in accordance with workplace procedures

2.5

Unplanned events are dealt with in accordance with problem-solving techniques and workplace procedures

2.6

Quality of work is monitored in accordance with workplace procedures and relevant industry standards

3

Document specifications for exchanger design

3.1

Analysis, findings, calculations and assumptions are documented in accordance with workplace procedures

3.2

Specifications for heat exchanger are developed from analysis findings and in accordance with workplace procedures

3.3

Developed specification and analysis is reported to relevant person/s for endorsement in accordance with workplace procedures

3.4

Justification for findings and actions undertaken in relation to the design is documented in accordance with workplace procedures and relevant industry standards for work/project and/or development records

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:

interpreting compliance documents

setting up and conducting appropriate examinations and tests

identifying non-compliance defects

reporting examination and test results and non-compliance issues clearly and accurately

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

developing specifications for exchanger designs

documenting specifications for exchanger designs

identifying analysis, findings, calculations and assumptions

preparing to develop specifications for exchanger designs

reporting findings and actions.

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:

heat exchanger design, safe working practices and relevant standards, codes and regulations, including:

advanced thermodynamics:

heat transfer:

modes of heat transfer

conduction through a flat plate, series flat plates, thick and thin wall pipe, and composite pipes (e.g. lagged pipes and drums)

convection at a flat surface or tube

radiation from a flat surface or tube for black or grey bodies

combined conduction and convection through single or multiple flat plates or thin wall tubes

combined convection and radiation

combined conduction, convection and radiation such as fluid in a tank (convection to wall), through wall and/or insulation

(conduction) to outside air (convection and radiation)

heat exchangers - parallel, counter flow and cross flow

refrigeration/heat pump:

basic principles and terminology

vapour compression cycle

performance criteria

types of refrigerant - designation, properties advantages and disadvantages

refrigerant properties using the pH diagram

ideal vapour compression cycle on the pH diagram

energy balance and heat transfers in compressor, evaporator and condenser

actual vapour compression cycle and variations from the ideal

pressure loss in lines and non-ideal compression

superheating and subcooling with or without suction/liquid heat exchanger

Carnot principle applied to refrigerator and heat pump

principles of evaporative refrigeration, absorption refrigeration, air cycle refrigeration and thermo-electric refrigeration

heater exchanger design:

concepts

design parameters and limitations

construction material and components

testing requirements

problem-solving techniques

relevant job safety assessments or risk mitigation processes

relevant manufacturer specifications

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace quality, policies and procedures.

Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must occur in suitable workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated suitable workplace operational situations that replicate workplace conditions.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Resources for assessment must include access to:

a range of relevant exercises, case studies and/or simulations

relevant and appropriate materials, tools, facilities and equipment currently used in industry

applicable documentation, including workplace procedures, equipment specifications, regulations, codes of practice and operation manuals.

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

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.

Developing specifications for heat exchangers must include at least the following:

two different designs

Electrotechnology

Refrigeration and air-conditioning