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  2. Diffuser (thermodynamics) - Wikipedia

    en.wikipedia.org/wiki/Diffuser_(thermodynamics)

    Diffusers are used in both all-air and air-water HVAC systems, as part of room air distribution subsystems, and serve several purposes: To deliver both conditioning and ventilating air; Evenly distribute the flow of air, in the desired directions; To enhance mixing of room air into the primary air being discharged

  3. Room air distribution - Wikipedia

    en.wikipedia.org/wiki/Room_air_distribution

    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.

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  6. Joule–Thomson effect - Wikipedia

    en.wikipedia.org/wiki/Joule–Thomson_effect

    The gas-cooling throttling process is commonly exploited in refrigeration processes such as liquefiers in air separation industrial process. [ 7 ] [ 8 ] In hydraulics, the warming effect from Joule–Thomson throttling can be used to find internally leaking valves as these will produce heat which can be detected by thermocouple or thermal ...

  7. Pratt & Whitney JT3D - Wikipedia

    en.wikipedia.org/wiki/Pratt_&_Whitney_JT3D

    With the demise of many airline 707s, the United States Air Force took the opportunity to buy the surplus airframes and use the engines to re-fit the KC-135As used by the Air National Guard and reserve squadrons with the civilian JT3D (designated TF33-PW-102). Over 150 aircraft were modified and the former KC-135A was re-designated the KC-135E.

  8. Pratt & Whitney JT9D - Wikipedia

    en.wikipedia.org/wiki/Pratt_&_Whitney_JT9D

    The JT9D introduced advanced technologies in structures, aerodynamics, and materials, which included titanium alloys and nickel alloys, to improve fuel efficiency and reliability compared to the Pratt & Whitney JT3D earlier turbofan. [2]

  9. Pratt & Whitney J58 - Wikipedia

    en.wikipedia.org/wiki/Pratt_&_Whitney_J58

    The Pratt & Whitney J58 (company designation JT11D-20) is an American jet engine that powered the Lockheed A-12, and subsequently the YF-12 and the SR-71 aircraft. It was an afterburning turbojet engine with a unique compressor bleed to the afterburner that gave increased thrust at high speeds.

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