ME 475/675 Introduction to Combustion Lecture 8. Announcements.

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Presentation transcript:

ME 475/675 Introduction to Combustion Lecture 8

Announcements

Dissociation

Equilibrium Products of Combustion

Fuel Rich Get CO, H 2 Fuel Lean O 2 T ad [K] “Old” “New”

Minor-Specie Mole Fractions

Simple Product Calculation method

CO 2 H2OH2O O2O2 N 2 /10

Atomic Balances

Solution

CO 2 H2OH2O H2H2 N 2 /10 CO

Air Preheaters Preheating the air using exhaust or flue gas increases the flame temperature Recuperators uses heat transfer across a wall Regenerators use a moving ceramic or metal matrix

Exhaust or Flue Gas Recirculation Inserting exhaust gas into the reactants reduces flame temperature, which can reduce pollution (oxides of nitrogen, NO, NO 2 )