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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Prepare for energy balance
   • Identify purpose of energy balance
   • Determine possible boundary for analysis
   • Identify plant and energy sources and sinks within boundary
2. Calculate heat transferred from/to items
   • Calculate conductive heat transfer to/from an object
   • Calculate convective heat transfer to/from an object
   • Calculate radiative heat transfer to/from an object
   • Calculate combined heat transfer to/from an object, including resistances in series and parallel
3. Calculate temperature change
   • Calculate temperature change caused by heating/cooling of process materials in typical examples of processing equipment
   • Calculate change in heat content caused by chemical reaction
   • Calculate temperature rise caused by chemical reaction
4. Select appropriate heating and/or cooling mechanism for an application
   • Compare rates of heat transfer/overall heat transfer coefficients for major methods/media of heating and cooling
   • Determine appropriate methods of varying/controlling rates of heat transfer
   • Calculate heat transfer rates under a range of conditions
   • Recommend most appropriate heat transfer mechanism/medium for this application
5. Conduct energy balance over process components
   • Determine desired boundaries for energy balance calculation
   • Determine possible sources of data required from the plant
   • Match and adjust sources of data to desired boundary for energy balance
   • Determine overall heating load
   • Determine overall cooling load
   • Interpret results to meet purpose of the energy balance

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.
Regulatory framework	The latest version of all legislation, regulations, industry codes of practice and Australian/international standards, or the version specified by the local regulatory authority, must be used, and include one or more of the following: legislative requirements, including work health and safety (WHS) industry codes of practice and guidelines environmental regulations and guidelines Australian and other standards licence and certification requirements All operations to which this unit applies are subject to stringent health, safety and environment (HSE) requirements, which may be imposed through state/territory or federal legislation, and these must not be compromised at any time. Where there is an apparent conflict between performance criteria and HSE requirements, the HSE requirements take precedence.
Procedures	All operations must be performed in accordance with relevant procedures. Procedures are written, verbal, visual, computer-based or in some other form, include one or more of the following: emergency procedures work instructions standard operating procedures (SOPs) safe work method statements (SWMS) formulas/recipes batch sheets temporary instructions any similar instructions provided for the smooth running of the plant

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Performance Evidence

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

determine the boundaries of the system to be studied

collect the required plant data from measurements, readings or calculated quantities

calculate the energy transfer loads

calculate change in heat content from exothermic/endothermic reactions relevant to the plant

conduct energy balances

report the results as required by the purpose of the energy balance.

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Knowledge Evidence

Evidence must be provided that demonstrates knowledge of:

conduction, convection and radiation

thermal properties of materials, particularly process materials

methods of heating process materials

cooling systems

energy balances

relevant process specific science.

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