excess air

excess air

[¦ek‚ses ′er]
(engineering)
Amount of air in a combustion process greater than the amount theoretically required for complete oxidation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
However, modern equipment like high-velocity excess air burners, ceramic fiber insulation, solid-state temperature controllers and temperature-sensing equipment make it possible to substantially reduce treatment cycles for carbon and alloy steels in a range of section sizes.
In a huge win for environmental groups, a federal judge has ordered ExxonMobil to pay nearly $20 million for spewing millions of pounds of excess air pollution from its Houston-area industrial facilities.
As the effect of lean burn on the decrease in cooling heat loss is larger than that of EGR, it is expected that higher engine thermal efficiency can be achieved with lean burn compared to excess air ratio of 1 condition with cooled EGR.
To combat the chances of incomplete combustion burners are always commissioned with an element of 'excess air. Combustion is complex and there are many variables such as air temperature, humidity, barometric pressure and fuel quality that affect the whole process.
Seven operating parameters under investigation included bed temperature, particle size, Ca/S ratio, excess air, circulating ratio, bed material height and secondary air ratio.
An entity related to the borrower currently owns the hotel property that abuts the site and had 118,675 s/f of excess air rights.
The remaining excess air is divided into two parts; most is injected through separate openings in the liner to mix with the hot combustion gas, while the remainder cools engine components downstream of the combustor.
This buildup can cause small areas of slurry tank turbulence and introduce excess air into the slurry.
This combustion mode is operated by inducing high excess air into cylinder so that peak combustion temperature is lower compared to stoichiometric condition which also lowers formation of the NOx emission.
It ran with low efficiency under lower boiler load with the flue gas oxygen level as high as 16% which indicated too much excess air. However, each boiler had two burners operating together in parallel which can actually work separately as two individual burners.