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Process duct work conveys large volumes of hot, dusty air from processing equipment to mills, baghouses to other process equipment. Process duct work may be round or rectangular. Although round duct work costs more to fabricate than rectangular duct work, it requires fewer stiffeners and is favored in many applications over rectangular ductwork.
The air in process duct work may be at ambient conditions or may operate at up to 900 °F (482 °C). Process ductwork varies in size from 2 ft diameter to 20 ft diameter or to perhaps 20 ft by 40 ft rectangular.
Large process ductwork may fill with dust, depending on slope, to up to 30% of cross section, which can weigh 2 to 4 tons per linear foot.
Round ductwork is subject to duct suction collapse, and requires stiffeners to minimize this, but is more efficient in material than rectangular duct work.
There are no comprehensive, design references for process duct work design. The ASCE reference for the design of power plant duct design gives some general guidance on duct design, but does not specifically give designers sufficient information to design process duct work.
known at that time as SPC 135P, "EMCS Message Protocol". The committee worked at reaching consensus using working groups to divide up the task of creating...
kitchen hood has a duct that is used to process and expel any smoke that is generated on top of the kitchen hob. Large sized duct hoods are widely used...
machine is likely to work. Engineers may seek license by a state, provincial, or national government. The purpose of this process is to ensure that engineers...
absorbed, by a body or a thermodynamic system, during a constant-temperature process—usually a first-order phase transition, like melting or condensation. Latent...
renal pelvis. The collecting duct participates in electrolyte and fluid balance through reabsorption and excretion, processes regulated by the hormones aldosterone...
property of the thermodynamic state, while heat and work are modes of energy transfer by which a process may change this state. A change of internal energy...
These systems generate heat in the space they are to heat, without extensive duct systems. Examples include electric space heaters, fireplaces, and solar heating...
valve. The scroll compression process is nearly 100% volumetrically efficient in pumping the trapped fluid. The suction process creates its own volume, separate...
the impeller, increasing the velocity of the gas. A diffuser (divergent duct) section converts the velocity energy to pressure energy. They are primarily...
here in approximate order, from the return duct (input to the AHU), through the unit, to the supply duct (AHU output). Air filtration is almost always...
simple form of a VAV box is the single duct terminal configuration, which is connected to a single supply air duct that delivers treated air from an air-handling...
Temperature ranges are defined as room temperature for certain products and processes in industry, science, standards, and consumer goods. For instance, for...
Building information modeling (BIM) is a process involving the generation and management of digital representations of the physical and functional characteristics...
used for watercooling internal computer components, most commonly the processor. While any suitable liquid can be used, water is the easiest liquid to...
the spaces to be cooled which then duct or deliver cold air into the spaces to be conditioned, rather than ducting cold air directly to these spaces from...
A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors...
Expansion Valves" (PDF). sporlanonline.com. Parker Hannifin Corporation, Sporlan Division. Retrieved 16 June 2014. How does a TEV work? Portal: Energy...
may allow for reduced energy consumption. Also, air handlers and large ducts are not used which can reduce the height above a dropped ceiling as well...
alternate pairs of which are enclosed on two sides to form twin sets of ducts at right angles to each other, and which contain the supply and extract...
latent and sensible are correlative. The sensible heat of a thermodynamic process may be calculated as the product of the body's mass (m) with its specific...
protection products used in heating, ventilation, and air conditioning (HVAC) ducts to prevent and isolate the spread of fire inside the ductwork through fire-resistance...
A heat pump is a device that uses work to transfer heat from a cool space to a warm space by transferring thermal energy using a refrigeration cycle, cooling...
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