forced air definition
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forced air Definition of forced air Forced air heating refers to room-level or floor-level heating which is distributed by fans next to electric coils that radiate heat. It does not apply to fuel-generated heat which is forced through ducts into various rooms.
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- In an air-handling system that provides cooled air to occupants of a building, most of the air is returned from the space back to the air handler to be reused. This is called … Return Air, or RA. However, some fresh air (called Outside Air, or OA) must be mixed in.
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(n). Forces Acting to Create Wind Forces Acting to Create Wind. Wind can be defined simply as air in motion. This motion can be in any direction, but in most cases the horizontal component of wind flow greatly exceeds the flow that occurs vertically. The speed of wind varies from absolute calm to speeds as high as 380 kilometers per hour (Mt.
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COPD  In-Depth Report The forced expiratory volume in one second (FEV1) is the volume of air exhaled in the first second of the FVC maneuver. The FEV1/FVC ratio is expressed as a percentage (e.g., FEV1 of 0.5 L divided by FVC of 2.0 L gives an FEV1/FVC ratio of 25 percent).
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Internal combustion engine Forced induction is the process of delivering compressed air to the intake of an internal combustion engine. A forced induction engine uses a gas compressor to increase the pressure, temperature and density of the air. An engine without forced induction is considered a naturally aspirated engine.
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Cabin pressurization Cabin pressurization is a process in which conditioned air is pumped into the cabin of an aircraft or spacecraft, in order to create a safe and comfortable environment for passengers and crew flying at high altitudes.
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free-stream flow The air in a region where pressure, temperature, and relative velocity are unaffected by the passage of aircraft through it. Also known as relative airflow (RAF). Continuous lines are free air stream airflow.
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wind 1. air in natural motion, as that moving horizontally at any velocity along the earth's surface, caused by temperature differentials in air. 2. a gale; storm; hurricane. 3. any stream of air, as that produced by a bellows or fan. 4. wind instrument.
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- wind noun (CURRENT OF AIR) A1 [ C or U ] a current of air moving approximately horizontally, especially one strong enough to be felt: There isn't enough wind to fly a kite. The forecast warned of winds of up to 60 miles an hour today.
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ventilation Definition of ventilation. 1 : the act or process of ventilating. 2a : circulation of air a room with good ventilationb : the circulation and exchange of gases in the lungs or gills that is basic to respiration.
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Definition of ram air in English: Definition of ram air - air which is forced to enter a moving aperture, such as the air intake of an aircraft. Definition of ram air - air which is forced to enter a moving aperture, such as the air intake of an aircraft.
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breatheverb breathe verb (AIR) B1 [ I or T ] to move air into and out of the lungs: It's so airless in here - I can hardly breathe. The instructor told us to breathe in deeply and then breathe out slowly. I'm sorry if I'm breathing (= blowing out air containing) garlic fumes all over you!
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Under Pressure Forced induction (known as supercharging) on the other hand, uses a mechanical means to increase the pressure of the intake air charge, commonly referred to as boost. Boosting the intake charge thrusts a larger quantity of air into the cylinder.
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Clean Air Act Law and Legal Definition The Clean Air Act of 1970 is a U.S. federal law intended to reduce air pollution and protect air quality. The act—which underwent major revisions in 1990 and 2003—deals with ambient air pollution (that which is present in the open air) as well as source-specific air pollution (that which can be traced to identifiable sources, such as factories and automobiles).
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Big Home, Small Bills. Here's How When a forced air system works to cool or heat your home, you have little control over where that air goes. This means that vacant rooms are getting the same amount of energy and service as your favorite spots in the house. It’s wasteful, inefficient and expensive to cool or heat the basement storeroom the same way you cool or heat the kitchen or bedroom. But a ducted system doesn’t allow for that kind of precise control.
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CONVECTION Convection is of two types: natural and forced. Heated air rising is an example of natural convection. Hot air has a lower density than that of the cooler air in the atmosphere above it and therefore is buoyant; as it rises, however, it loses energy and cools. This cooled air, now denser than the air around it, sinks again, creating a repeating cycle that generates wind.
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- Thrust is the force which moves an aircraft through the air. Thrust is used to overcome the drag of an airplane, and to overcome the weight of a rocket.Thrust is generated by the engines of the aircraft through some kind of propulsion system.Thrust is a mechanical force, so the propulsion system must be in physical contact with a working fluid to produce thrust. Thrust is generated most often through the reaction of accelerating a mass of gas.Since thrust is a force, it is a vector quantity having both a magnitude and a direction.The engine does work on the gas and accelerates the gas to the rear of the engine; the thrust is generated in the opposite direction from the accelerated gas.ince thrust is a force, it is a vector quantity having both a magnitude and a direction. The engine does work on the gas and accelerates the gas to the rear of the engine; the thrust is generated in the opposite direction from the accelerated gas.
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forced vital capacity forced vital capacity. See forced expired vital capacity. FVC Pulmonary medicine The volume of air exhaled with maximum effort and speed after a full inspiration; FVC is usually ↓ and thus is a major parameter measured in obstructive airways disease, a term that encompasses both asthma and COPD.
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Peak Expiratory Flow Rate Measurement Forced expiratory volume over 1 second (FEV1) is a dynamic measure of flow used in formal spirometry. It represents a truer indication of airway obstruction than does peak flow rate. Although peak flow rate usually correlates well with FEV1, this correlation decreases in patients with asthma as airflow diminishes.
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What is free air delivery in an air compressor? FAD (Free Air Delivery) (f.a.d) is the actual quantity of compressed air converted back to the inlet conditions of the compressor. In other words, it is a standardized measure of the capacity of an air compressor.The units for FAD are CFM in the imperial system and l/min in the SI system 1.8k Views · Answer requested by Ram Krishnan
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- A measure of the rate at which the air in an interior space is replace by outside (or conditioned) air by ventilation and infiltration; usually measured in cubic feet per time interval (hour), divided by the volume of air in the room.
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Damper (flow) Damper (flow) A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate it for room-by-room temperature and climate control. Its operation can be manual or automatic. Manual dampers are turned by a handle on the outside of a duct.
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Bleed air Bleed air produced by gas turbine engines is compressed air that is taken from the compressor stage of those engines, which is upstream of the fuel burning sections.
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What is ventilation? Definitions covering ventilation and the flow of air into and out of a space include: Purpose provided (intentional) ventilation: Ventilation is the process by which ‘clean’ air (normally outdoor air) is intentionally provided to a space and stale air is removed.urpose provided (intentional) ventilation: Ventilation is the process by which ‘clean’ air (normally outdoor air) is intentionally provided to a space and stale air is removed.
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What is ventilation? Air infiltration and exfiltration: In addition to intentional ventilation, air inevitably enters a building by the process of ‘air infiltration’. This is the uncontrolled flow of air into a space through adventitious or unintentional gaps and cracks in the building envelope.urpose provided (intentional) ventilation: Ventilation is the process by which ‘clean’ air (normally outdoor air) is intentionally provided to a space and stale air is removed.
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How Safe Is Your Ground Beef? Tuck it inside burritos. Stir it into chili. Even as U.S. red meat consumption has dropped overall in recent years, we still bought 4.6 billion pounds of beef in grocery and big-box stores over the past year. And more of the beef we buy today is in the ground form—about 50 percent vs. 42 percent a decade ago. We like its convenience, and often its price.