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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Calculate the energy cost to run air-conditioning, refrigeration and ventilation plants 
SAQA US ID UNIT STANDARD TITLE
9446  Calculate the energy cost to run air-conditioning, refrigeration and ventilation plants 
ORIGINATOR
SGB Air-conditioning Refrigeration and Ventilation 
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 5  Level TBA: Pre-2009 was L5  5 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Registered" 		 2001-06-13  2004-06-13  SAQA 0836/01 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2005-06-13   2008-06-13  

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 
Calculate actual and projected energy costs for air-conditioning, refrigeration and ventilation systems. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • A thorough understanding of the operation and control of air-conditioning, refrigeration and ventilation plants, especially under full load and part load conditions.
  • Appraise control sequence diagrams for control system for air-conditioning, refrigeration and ventilation plants.
  • Interpretation of electrical diagrams. 
    		•

    UNIT STANDARD RANGE 
    Plants typically used in commercial/ industrial applications. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Determine what portion of actual electricity bill can be apportioned to the air-conditioning. 
    OUTCOME NOTES 
    Determine what portion of an actual electricity bill can be apportioned to the air-conditioning, refrigeration or ventilation installation. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. All electrical loads are determined correctly. 

    ASSESSMENT CRITERION 2 
    2. The figure calculated is congruent with the power of the drive motor(s) and other power consuming items, their power factors, the load factor, the running time of the plant, the tariff structure and the kWh and maximum demand costs. 

    SPECIFIC OUTCOME 2 
    Forecast likely cost of electricity to run air-conditioning without load shifting. 
    OUTCOME NOTES 
    Forecast the likely cost of electricity to run an air-conditioning, refrigeration or ventilation installation for a specified period of time (days/weeks/months/years) without load shifting. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The figure calculated without load shifting is based on the power of the drive motor(s) and other power consuming items, their power factors, the estimated load factor, the running time of the plant and the correct tariff structure. 

    ASSESSMENT CRITERION 2 
    2. The principles of load shifting are listed and explained. 

    ASSESSMENT CRITERION 3 
    3. The consequences of wrong control settings on the energy costs to run a plant are listed and explained. 

    SPECIFIC OUTCOME 3 
    Forecast likely cost of electricity to run air-conditioning with load shifting. 
    OUTCOME NOTES 
    Forecast the likely cost of electricity to run an air-conditioning, a refrigeration or ventilation installation for a specified period of time (days/weeks/months/years) with load shifting. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The figure calculated with load shifting is based on the power of the drive motor(s) and other power consuming items, their power factors, the estimated load factor, the running time of the plant and the tariff structure. 

    SPECIFIC OUTCOME 4 
    Show the difference in costs between applying and not applying load shifting. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The cost differences are explained in a report assisted by information presented in graphs and in table format. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    Any person wishing to be assessed against this unit standard may apply to an assessment agency, assessor or provider institution accredited by the relevant ETQA, who may appoint a moderator to be present at the assessment.

    The assessor must have knowledge and experience of air-conditioning or refrigeration. 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    The electricity tariff structure and rates; equipment operating time; billing period; where load shifting can be applied; how load shifting can reduce running cost. 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems
  • Determination of electrical works and equipment details
  • Determination of electrical tariffs 
    		•

    UNIT STANDARD CCFO ORGANISING 
    Organize and manage myself and my activities
  • Using the correct procedures 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information
  • Determining and using equipment details and tariffs correctly 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively
  • Writing a report 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically
  • Application of design parameters 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems
  • Understanding the cost of electricity 
    		•

    UNIT STANDARD NOTES 
  • The information supplied and calculations made must be in line with ruling energy tariff structures.
  • Load shifting is the switching off of plant and equipment during peak load periods in order to limit/reduce maximum demand. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  20722   National Diploma: Air Conditioning, Refrigeration and Ventilation  Level 5  Level TBA: Pre-2009 was L5  Passed the End Date -
    Status was "Registered"     		 2004-06-13  MERSETA 


    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.