SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Evaluate refrigeration and heat pump performance efficiency 
SAQA US ID UNIT STANDARD TITLE
263914  Evaluate refrigeration and heat pump performance efficiency 
ORIGINATOR
SGB Engineering 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Engineering and Related Design 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 6  Level TBA: Pre-2009 was L6 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This unit standard is for persons in the Engineering, Construction and Energy Sectors.

This unit standard will contribute to the full development of the learner within the engineering, construction and energy environment by providing recognition, further mobility and transportability within the field of Physical Planning and Construction. The skills, knowledge and understanding demonstrated within this unit standard are essential for social and economic transformation and upliftment within the engineering, construction and energy environment.

A person credited with this unit standard will be able to:
  • Interpret the fundamentals of refrigeration.
  • Describe the operation of refrigeration system components.
  • Describe ways in which the refrigeration system is applied.
  • Identify and apply energy management opportunities. 

  • LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The following knowledge, skills attitude and/or equivalent:
  • A working knowledge of energy use in buildings.
  • A knowledge of energy audit principles.
  • A working knowledge of electricity. 

  • UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Interpret the fundamentals of refrigeration. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The vapour compression refrigeration cycle is explained in terms of its steps. 
    ASSESSMENT CRITERION RANGE 
    Refrigeration steps include; Evaporator, compressor, condenser and throttling.
     

    ASSESSMENT CRITERION 2 
    The heat pump cycle is explained in terms of the purpose of each stage. 

    ASSESSMENT CRITERION 3 
    The practical considerations for vapour compression systems are explained in terms of their limitations. 
    ASSESSMENT CRITERION RANGE 
    Limitations include; Heat transfer and hot gas by-pass.
     

    ASSESSMENT CRITERION 4 
    The absorption cycle is explained in terms of the process of each of the steps. 
    ASSESSMENT CRITERION RANGE 
    Absorption cycle steps include; Absorber, generator and expansion.
     

    ASSESSMENT CRITERION 5 
    The absorption refrigeration cycle components are identified and described in terms of a line diagram. 

    ASSESSMENT CRITERION 6 
    Refrigerants are identified and described in terms of their characteristics, applications and type. 

    SPECIFIC OUTCOME 2 
    Describe the operation of refrigeration system components. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Refrigerant compressors are identified and their operation explained in terms of type or classification. 
    ASSESSMENT CRITERION RANGE 
    Refrigerant compressors include:
  • Type; Displacement and dynamic.
  • Classification; Hermetic, semi-hermetic and open.
     

  • ASSESSMENT CRITERION 2 
    Evaporators are identified and categorised in terms of their operation. 
    ASSESSMENT CRITERION RANGE 
    Category include; Direct expansion coils and liquid coolers.
     

    ASSESSMENT CRITERION 3 
    Throttling devices are identified and their operation and function explained in terms of their application. 
    ASSESSMENT CRITERION RANGE 
    Throttling devices include; Constant pressure expansion valve, thermostatic valve and float valve.
     

    ASSESSMENT CRITERION 4 
    Condensers are identified and their operation and function explained in terms of their application and characteristics. 
    ASSESSMENT CRITERION RANGE 
    Condensers include; Water-cooled condensers and air cooled condensers.
     

    ASSESSMENT CRITERION 5 
    Heat rejection equipment is identified and their operation and function explained in terms of their application and methods. 
    ASSESSMENT CRITERION RANGE 
    Heat rejection equipment methods include; Air-cooling, water-cooling and evaporative cooling.
     

    SPECIFIC OUTCOME 3 
    Describe ways in which the refrigeration system is applied. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Heat pump systems are described and their operation explained in terms of their application. 

    ASSESSMENT CRITERION 2 
    The food freezing step is described in terms of the type of food and food quality. 

    ASSESSMENT CRITERION 3 
    Refrigeration is described and its operation explained in terms of freezing processes in the food industry. 
    ASSESSMENT CRITERION RANGE 
    Freezing processes includes but is not limited to:
  • Air blast freezing, plate freezing, scrape surface freezing and cryogenic freezing.
     

  • ASSESSMENT CRITERION 4 
    The demand profile is assessed in terms of possible opportunities for savings. 

    SPECIFIC OUTCOME 4 
    Identify and apply energy management opportunities. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Energy management potential is identified and implemented in terms of housekeeping opportunities. 
    ASSESSMENT CRITERION RANGE 
    House keeping opportunities include but are not limited to:
  • Keeping heat transfer surfaces clean, repair line insulation, control calibration, specified refrigerant charge, unrestricted air movement and minimisation of simultaneous use of heating and cooling equipment.
     

  • ASSESSMENT CRITERION 2 
    Energy management potential is identified and implemented in terms of low cost opportunities. 
    ASSESSMENT CRITERION RANGE 
    Low cost opportunities include but are not limited to:
  • Increased evaporator temperature, reduced condensing temperature, automatic water treatment system provision, automatic controls upgrade, insulation upgrade, multispeed fan motors, heat pump alternative and lockable covers.
     

  • ASSESSMENT CRITERION 3 
    Energy management potential is identified and implemented in terms of retrofit opportunities. 
    ASSESSMENT CRITERION RANGE 
    Retrofit opportunities include but are not limited to:
  • Absorption equipment, heat pump use and the use of naturally available water.
     

  • ASSESSMENT CRITERION 4 
    Energy management opportunities are quantified in terms of energy and cost savings and payback. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA.
  • Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines in the relevant qualification and the agreed ETQA procedures. 

  • UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Knowledge that will help me understand and that I will be able to explain:
  • Efficient use of energy.
  • Energy efficient lights, appliances and equipment.
  • Implementation of technology for energy savings. 

  • UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems (Identify potential barriers and practical problems and solve them to enable the energy audit to be carried out). 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage oneself (Understand and manage the energy audit process). 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate (Describe how energy management opportunities can be carried out). 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology (Identify, design and implement technology solutions for energy efficiency). 

    UNIT STANDARD CCFO DEMONSTRATING 
    Understand the world as a set of related systems (Understand the global impact of the efficient use of energy in terms emission mitigation). 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Supplementary Information:

    Specified requirements include legal and legislative specific requirements and are contained in one or more of the following documents
  • OSH Act.
  • SANS standards and codes.
  • The South African Building Regulations.
  • IES Lighting Standards.
  • ASHRAE Standards.
  • User manuals supplied by manufacturers.
  • Specifications, agreements, policies and procedures of the relevant organisation.
  • Good Practise in South Africa. 

  • QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  63209   National Certificate: Energy Regulation  Level 5  NQF Level 05  Reregistered  2023-06-30  As per Learning Programmes recorded against this Qual 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.