TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

EXCES AIR [2 records]

Record 1 2000-05-25

English

Subject field(s)
  • Combustion and Fuels (Fireplaces)
  • Burners and Steamfitting
DEF

Air which passes through a combustion zone in excess of the quantity theoretically required for complete combustion.

Key term(s)
  • excess of air

French

Domaine(s)
  • Combustion et combustibles (Foyers)
  • Fumisterie et brûleurs
DEF

[...] la différence entre la quantité d'air réellement délivrée à l'unité de masse du combustible et le pouvoir combustivore (ou air théorique) de ce même combustible.

CONT

Le volume d'air théorique nécessaire pour assurer la combustion complète d'un combustible est Lmin ou pouvoir comburivore. Cependant une combustion complète n'a lieu dans les foyers domestiques qu'avec excès d'air, c'est-à-dire par apport d'un volume d'air supérieur à celui qui serait théoriquement nécessaire.

Spanish

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Record 2 2000-02-28

English

Subject field(s)
  • Combustion and Fuels (Fireplaces)
DEF

the air-fuel ratio supplied to a furnace that provides more air than the optimum ratio.

CONT

The operating principal of the RMB [Rapid Mix Burner] staged firing configuration is to bum as much of the fuel as possible under the high excess air, ultralow NOx conditions. As a result of the fundamental principle mentioned above, this is done by operating the burners air rich (under conditions similar to normal firing, but with higher excess air and with a moderate amount of FGR), where the maximum theoretical NOx, formation is very predictable. Heat is extracted from these air-rich combustion products and cool furnace recirculation products are entrained. The staged fuel is then mixed with the air-rich burner products and combustion is completed. The excess air at the boiler outlet is thus similar to that with normal firing.

French

Domaine(s)
  • Combustion et combustibles (Foyers)
CONT

Les brûleurs XNM sont conçus pour fonctionner dans des gammes importantes de rapport air/gaz et notamment en large excès d'air. Leur conception ainsi que leur construction assurent une excellente stabilité de flamme à tous débits et dans une large gamme de rapport air/gaz.

Spanish

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