Required knowledge includes: WHS and regulatory requirements, codes of practice, standards, risk management and registration requirements sources of professional and technical assistance current options and trends in performance analysis software, including underpinning program techniques thermal load measuring equipment and test apparatus sustainability implications of HVAC systems, including consideration of energy sources and energy efficiency thermodynamic principles required by thermal loading analysis and HVAC/R management systems thermodynamic concepts related to HVAC/R: properties, process and state mass, conservation of mass, specific volume and density, specific volume, relative density, force, weight, pressure, temperature, Zeroth law, absolute scales and International System of Units (SI) units systems, cycles and steady state energy forms effects of heating of solids and liquids heat transfer, conduction, convection and radiation: property tables for conductivity, convection and radiation coefficients Fourier law of conduction and conductivity of materials convection: mechanism of convection convection heat transfer coefficient and factors affecting the coefficient fluid flow characteristics (geometry of convection surfaces, natural and forced convection and flow regime) units, kinematic viscosity and dynamic viscosity convective heat transfer coefficients for conduit and annular flow, hydraulic diameter heat exchangers (types, efficiency and measurements) radiators: emission, absorption and reflection (properties and measurements) Wien’s displacement law Kirchhoff’s law solar energy, heating and power generation radiant energy on surfaces variations, such as Azimuth and zenith angles, path length, cloud cover and water vapour, and shade factors for windows combined heat transfer conduction plus convection, heat exchangers using air and water as transfer mediums conduction, convection and radiation (qualitative) cooling fins heat flow, electrical analogy, graphical solution techniques and qualitative understanding of numerical methods vapour compression refrigeration: vapour-compression cycle for refrigeration system components, including throttling valves and capillary tubes as throttling devices performance criteria for refrigeration system evaluation types of refrigerant refrigerant properties and p-h diagrams: ideal vapour compression cycle on the p-h diagram energy balance and heat transfers in compressor, evaporator and condenser variation of actual cycles from the ideal vapour-compression cycle with suction superheating, liquid sub-cooling and pressure drop in system components mechanical components of vapour compression (refrigeration and HVAC systems) refrigeration enclosures, cabinets, cold rooms and freezer rooms factors affecting refrigeration heat transfer building thermal performance survey procedures standard thermal values in relation to a commercial/industrial building equipment size for constant and variable volume systems and central refrigeration and boiler capacities thermal properties of buildings and building materials people loads cost implications of air conditioning and heating designs heat loads thermal lag occupant comfort and safety factors |