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Combustion occurring without a pressure change.



Related Terms

BOILER

A closed vessel in which water is heated, steam is generated, steam is superheated, or any combination thereof, under pressure or vacuum by the application of heat from combustible fuels, electricity, or nuclear energy. The term dose not include such facilities of an integral part of a continuous processing unit but does include fired units of heating or vaporizing liquids other than water where these units are separate from processing systems and are complete within themselves.

MANIFOLD PRESSURE

The pressure in the intake manifold of an internal combustion engine.

COMPRESSION RATIO

The ratio of the absolute pressure at the discharge from a compressor divided by the absolute pressure at the suction. For internal combustion engines compression ration is absolute pressure at the end of compression stroke divided by absolute pressure at beginning of this stroke

UNFIRED PRESSURE VESSEL

A vessel designed to withstand internal pressure, neither subjected to heat from products of combustion nor an integral part of a fired pressure vessel system.

COMPRESSION PRESSURE

That pressure developed in a reciprocating piston engine at the end of the compression stroke without combustion of fuel.

WINDBOX

A chamber below the grate or surrounding a burner, thru which air under pressure is supplied for combustion of the fuel.

FORCED DRAFT

Air under positive pressure produced by fans at the point where air or gases enter a unit, such as a combustion furnace.

FLUE GAS EXPANDER

In a petroleum processing system, a turbine for recovering energy at the point where combustion gases are discharged under pressure to the atmosphere; the reduction in pressure drives the turbine impeller.

CLOSED FIREROOM SYSTEM

A fireroom system in which combustion air is supplied via forced draft resulting from positive air pressure in the fireroom.

DIESEL KNOCK

A combustion knock caused when the delayed period of ignition is long so that a large quantity of atomized fuel accumulates in the combustion chamber; when combustion occurs, the sudden high pressure resulting from the accumulated fuel causes diesel knock.

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