Air Cycle Air Conditioning Components Flashcards
Located in the aircrafts slipstream as a means of providing ambient ram air to help with system cooling.
Always closed during normal operations. Energized to open position when the cockpit switch is placed in the ram position or when normal air conditioning systems fail.
Ram air valve
Removes heat from the bleed air.
Bleed air is directed through an air to air heat exchanger where air is initially cooled by outside air at ambient temperature.
Can only cool bleed air to the temperature of the air temp.
Heat exchanger
Allows for the total or partial bypass of bleed air to the turbine to provide hot or warm air for cabin heating
Temperature control valve
Mixing valve
Other name of a temperature control valve
Mixing valve
Cools air by rapidly expanding the compressed bleed air and extracting energy as the air turns the turbine impeller
Expansion turbine
Augments the cooling airflow through the heat exchanger
Cooling fan
Controls speed of the expansion turbine and limits the mass amount of air that the turbine will be expending for cabin cooling
Refrigeration bypass valve
Removed approximately 80% of excess moisture from conditioned air
Water separator and drain
Installed in the ductwork to prevent the cabin from depressurizing in case of engine shutdown
Check valve
Tones down excessive re-circulation fan noise during operation
Intake muffler
Port that allows portable air conditioning to be connected to the aircraft for cooling during ground maintenance
External air connection
Directs bleed air from the source (engine or APU)
Bleed air manifold
Mixes warm air and water drained from the water separator to prevent freezing.
Atomizer
Allows for thermal expansion between the hot ductwork and cold airframe structure.
Allows any tube or duct to increase or decrease in length dependent on temperature.
Expansion bellows
Dumps air outside to prevent the cabin from over pressurizing
Dump valve
