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Elements and Performance Criteria

1. Prepare to design complex industrial refrigeration system
   • WHS/OHS requirements and workplace procedures for a given work area are identified, obtained and applied
2. WHS/OHS risk control measures and workplace procedures are followed in preparation for the work
3. Scope of the refrigeration system is determined from the design brief and/or consultations with relevant person/s
4. Design development work is planned in accordance with workplace procedures for timelines in consultation with others involved
5. Design complex industrial refrigeration system
   • Relevant industrial refrigeration system processes and methods are applied to the design
6. Alternative concepts for design are evaluated in accordance with the design brief
7. Safety, functionality and budgetary considerations are incorporated in the design specifications
8. System design draft is checked for compliance in accordance with the design brief and relevant industry standards
9. System design is documented and submitted to relevant person/s for approval in accordance with workplace procedures
10. Unplanned events are dealt with in accordance with problem-solving techniques and workplace procedures
11. Obtain approval for complex industrial refrigeration system design
    • System design is presented to customer and/or relevant person/s in accordance with workplace procedures
12. Requests for alterations to the design are negotiated with relevant person/s in accordance with workplace procedures
13. Final design is documented and approval obtained from relevant person/s in accordance with workplace procedures
14. Quality of work is monitored in accordance with workplace procedures and relevant industry standards

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.
Designing a complex industrial refrigeration system must include at least the following:	one multiple major component, including: compressors condenser evaporators circuits and/or systems associated components and controls

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Performance Evidence

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:

developing outlines of alternative designs developing the design within the safety, regulatory, functional requirements and budget limitations documenting and presenting design effectively negotiating design alteration requests successfully obtaining approval for final design dealing with unplanned events applying relevant industrial refrigeration system processes and methods applying relevant work health and safety (WHS)/occupational health and safety (WHS/OHS) requirements, including using rick control measures designing complex commercial refrigeration system preparing to design complex industrial refrigeration system.

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Knowledge Evidence

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

complex industrial refrigeration system design, safe working practices and relevant standards, codes and regulations including: AS/NZS 1677 Refrigerating systems SAA refrigeration code ANSI/IIAR standards ANSI/ASHRAE standards IIAR bulletins moderate and low temperature industrial refrigeration systems: direct, flooded and pumped liquid recirculation systems evaporators multi-staged compression direct staging cascade staging compound compressors de-superheaters and liquid injection direct expansion intercoolers open and closed intercoolers basic designs of accumulators/intercooler vessels oil cooling methods oil stabilisation, return and oil recovery in flooded systems multiple evaporators and multiple compressors: parallel evaporators multiple temperature systems evaporator pressure regulators temperature control methods parallel compressors pipe work layout methods of establishing pressure drop in dry and wet suction lines indirect refrigeration systems: classification according to AS/NZS 1677 Refrigerating systems SAA refrigeration code applications evaporators heat exchangers, types, construction and selection secondary refrigerants brines antifreeze solutions flooded systems: applications equipment accumulators level controls liquid recirculation pumps liquid pressure relief valve cryogenic systems: applications and equipment system components refrigerants design safety economics cascade systems basic control sequences: maintaining evaporator conditions staging and suction pressure control maintaining condenser conditions control of intermediate pressure, methods of industrial refrigeration compressor capacity control system design: required cooling capacity per day running time and required system cooling capacity system capacity control for peak and low load refrigeration system diagrams refrigerant, equipment, major component, controls, piping and accessory selection problem-solving techniques relevant job safety assessments or risk mitigation processes relevant manufacturer specifications relevant WHS/OHS legislated requirements relevant workplace budget, quality, policies and procedures relevant workplace documentation.

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