natural draft

natural draft

[′nach·rəl ′draft]
(fluid mechanics)
Unforced gas flow through a chimney or vertical duct, directly related to chimney height and the temperature difference between the ascending gases and the atmosphere, and not dependent upon the use of fans or other mechanical devices.

natural draft

The flow of gases in a chimney due to the difference in temperature and density between the gases within the chimney and the outside air.
References in periodicals archive ?
These Legionella can be discharged by the air movement of the fans or by the natural draft of the cooling tower.
The agreement covers both forced air flare and vapor combustor systems as well as natural draft flares.
Tenders are invited for Work contract for under water sealing work by skilled diver of Natural Draft Cooling Tower Basin stop log gate other BOP area as and when required basis of ABVTPS, CSPGCL, Janjgir-Champa.
The seaport with a natural draft of 13 meters, is aimed at boosting the business activities of the state.'
"I wanted the cleanest burning, most efficient natural draft pizza and bread oven," he said.
SPIG's product offering includes air-cooled (dry cooling) systems, mechanical draft wet cooling towers and natural draft wet cooling hyperbolic towers.
In furtherance of their support of 99.1FM, Flat Rate Home Services has donated a 40 gallon, gas residential natural draft Bradford White water heater that will be available on the radio station's 'Get My Perks' page.
The air flow due to natural draft was calculated by omitting losses due to duct wall friction and the resulting estimated velocity was 588 in/s (15 m/s) from equation 1 [8].
WingFan is a helpful option for applications where adequate natural draft is not available.
The Russian delegation, according to Lavrov, has offered a "complete and natural draft," including the cessation of violence by armed groups.
In a natural draft chimney, like the one at Manzanares, the draft at the bottom is proportional to the difference in temperature between the rising warm air and the surrounding cooler ambient air, as well as to the height of the chimney.
Engineering/site services of charge heater Tender no: ST11101300 Description: The scope of work includes: (A) Design and engineering of new convection section process coils; (B) Design and engineering of new flue gas duct from the convection section to the existing stack; (C) Design and engineering of new natural draft Low-NOx burners including any heater floor modifications and the burners' predicted performance; (D) Computational Fluid Dynamics analysis for the new burners and the radiant section at design case; (E) Design and engineering of new recommended instrumentation associated with the revamp work; (F) Design of new internal insulation (castables) with stainless steel anchors; (G) Design of any structural changes including painting and others.