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Displacement ventilation systems supply air directly to the occupied zone.The air is supplied at low velocities to cause minimal induction and mixing. This system is used for ventilation and cooling of large high spaces, such as auditorium and atria, where energy may be saved if only the occupied zone is treated rather than trying to control the conditions in the entire space.
The airtightness of a building is often expressed in terms of the leakage airflow rate through the building's envelope at a given reference pressure (usually 50 pascal) [10] divided by the: Heated building volume V. At 50·Pa, it is called the air change rate at 50 Pa and usually noted n 50 (units: h −1). [13] [14] Envelope area A E.
In phonetics, the airstream mechanism is the method by which airflow is created in the vocal tract. Along with phonation and articulation , it is one of three main components of speech production. The airstream mechanism is mandatory for most sound production and constitutes the first part of this process, which is called initiation .
Flow-through ventilation is the main ventilation circuit for the mine. Air enters the mine from the surface via a shaft , ventilation raise or adit . The air is distributed through the mine via internal ventilation raises and ramps, and flows are controlled by regulators and permanently mounted ventilation fans.
Airflow, or air flow, is the movement of air. Air behaves in a fluid manner, meaning particles naturally flow from areas of higher pressure to those where the pressure is lower. Atmospheric air pressure is directly related to altitude , temperature , and composition.
The combination throttle valve connected to the check valve is called a one way flow control valve. While air passes from one direction to the other, the check valve will not allow air flow as the check valve allows flow only in one direction. While passing through the restricted way of throttle, compressed air flow takes place.
English: A diagram showing the airflow through the nacelle of the SR71 Blackbird as the speed increases from zero to Mach 3.2. This image is based on Figure 1.21 from the SR-71 Flight Manual. Русский: Схема движения воздушных потоков в мотогондоле самолёта Lockheed SR-71 при ...
An air flow meter is a device similar to an anemometer that measures air flow, i.e. how much air is flowing through a tube. It does not measure the volume of the air passing through the tube, it measures the mass of air flowing through the device per unit time, though Thus air flow meters are simply an application of mass flow meters for the ...