Air Conditioning Systems Flashcards
What are the 4 classifications (based on size and applications) of air conditioning systems ?
Domestic
Commercial
Industrial
Transport
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What are the 5 main types of air conditioning in Australia ?
Self-contained units (RAC’s)
Split systems
Ducted systems
Package units
Central plant systems
What are Self-Contained Units (RACs)
What system is this ?
Split system
What system is this ?
Ducted system
What system is this ?
Package Unit
What system is this ?
Central plant systems
What are the 4 main steps of risk management process ?
- Identifying hazards
- Assessing risks
- Controlling risks
- Monitoring and review
Fill in the temperature readings.
What instrument is this ?
Stem Thermometers
What instrument is this ?
Infrared thermometer
What instrument is this ?
Dial thermometer
What is Relative humidity ?
Relative humidity is a measure of how much water vapour is in the air, expressed as a percentage
100% = completely saturated. (Can’t hold any more water)
What instrument is this ?
Wet/Dry Bulb Hygrometer
What do these readings indicate ?
What instrument is this ?
Sling Psychrometer
What instrument is this ?
Digital Hygrometer
What is Air Flow Rate ?
The amount of air passing through a particular area (e.g. a duct) each second. (m3/s),
What instrument is this ?
Vane Anemometer
What instrument is this ?
Hot Wire Anemometer
Used for measuring very low flow rates
What instrument is this ?
Hood Anemometer
What are the composition of air ?
What is dry bulb temperature ? (DBT)
What is Dew Point (DP) ?
What is Relative Humidity (RH%) ?
What is specific Humidity (SH) ?
What is Enthalpy (H) ? in relation to air conditioning.
What is specific volume (SV) ?
The specific volume is a measure of how dense the air is, measured in cubic metres per kilogram (m3/kg), i.e. how much space is occupied by each kilogram of air (remember that air expands as it heats up).
What is specific heat ? (in context of air conditioning)
What is latent Heat ? (in context of air conditioning)
What is sensible Heat ? (in context of air conditioning)
What is Total Heat (Enthalpy) ? (in context of air conditioning)
List 4 forms of latent heating/cooling.
· Fusion – changing from a liquid to a solid.
· Melting – changing from a solid to a liquid.
· Vapourisation (evaporation or boiling) – changing from a liquid to a gas.
· Condensation – changing from a gas to a liquid.
What is the difference between boiling and evaporation ?
Boiling – occurs throughout a complete volume of liquid
Evaporation – only occurs at the surface of the liquid.
What is Sensible Heat Ratio (SHR) ?
What are the air conditioning cycle ?
Explain the various points in this chart.
List 3 cooling methods of the human body.
List the ranges of conditions for human comfort.
What are the Noise level requirements when installing air conditioning.
Must not exceed 5 dBA above background levels.
Must not be audible within a neighbour’s house at night (e.g. 10 pm – 7 am).
Note: manufacturer’s specifications should indicate the sound power level of their units
List 4 Factors that affect sizing and selecting air conditioning units.
