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Pack. as an abbreviation of package, applied to both pneumatic and non-pneumatic systems (Boeing, Airbus, Embraer, Bombardier and Lockheed) PAC as an acronym meaning either Passenger Air Conditioning or pneumatic air conditioning (the latter being found on systems control panels of at least one business jet supplier)
These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.
An ignition coil is used in the ignition system of a spark-ignition engine to transform the battery voltage to the much higher voltages required to operate the spark plug(s). The spark plugs then use this burst of high-voltage electricity to ignite the air-fuel mixture. The ignition coil is constructed of two sets of coils wound around an iron ...
Thermoelectric cooling uses the Peltier effect to create a heat flux at the junction of two different types of materials. A Peltier cooler, heater, or thermoelectric heat pump is a solid-state active heat pump which transfers heat from one side of the device to the other, with consumption of electrical energy, depending on the direction of the current.
Active cooling on CPUs started to appear on the Intel 80486, and by 1997 was standard on all desktop processors. [2] Chassis or case fans, usually one exhaust fan to expel heated air from the rear and optionally an intake fan to draw cooler air in through the front, became common with the arrival of the Pentium 4 in late 2000. [2]
A coil condenser is essentially a Graham condenser with an inverted coolant–vapor configuration. It has a spiral coil running the length of the condenser through which coolant flows, and this coolant coil is jacketed by the vapor–condensate path.
[1] [2] [3] Contour integration is closely related to the calculus of residues, [4] a method of complex analysis. One use for contour integrals is the evaluation of integrals along the real line that are not readily found by using only real variable methods. [5] Contour integration methods include:
Following the introduction of the overhead-cam Triton-series V8s for the 1997 Ford F-Series and E-Series, the 2001 Explorer would be the final Ford Motor Company vehicle in North America sold with an overhead-valve gasoline-powered V8 engine for nearly two decades (until the 2020 introduction of the 7.3 L Godzilla V8 for Super Duty trucks).