1. Thermodynamics of Actual Combustion
P M V Subbarao
Professor
Mechanical Engineering Department
Selection of Conditions for Efficient and Eco-friendly Combustion….

2. Mathematical Model for Completion of Reaction
For every fuel, a designer should know all possible reactants !!!
Some products will influence the efficiency of reaction.
Few other may not influence the efficiency of reaction but severely affect the environment.
The optimal parameters for efficient reaction may not be optimal for safe reaction !!

3. Generalized Theory of Extent of Reaction Possible
P1,T1
P3,T3
P2,T2
Entropy of Universe
Extent of Reaction

4. Model Testing for Determination of important species
Water Flow Rate
Air Flow Rate
Flue gas Analysis
Fuel Flow Rate

5. Results of Model Testing.
For a given fuel and required steam conditions.
Optimum air flow rate.
Optimum fuel flow rate.
Optimum steam flow rate.
Optimum combustion configuration!!!
Realization of MATtr Theory
Mixing: Fuel preparation systems.
Air: Draught systems.
T : Preheating of fuel.
t : Dimensions of combustion chamber.
r: Turbulence generation systems.

6. Air composition
Air is a mixture of nitrogen, oxygen CO2 and some inert gases.
It also consists of water vapours of varying quantity.
The mean percentage of main atmospheric constituents in clean air and their mean residence times are presented below.

7. Humid Air

8. Combustion with Ambient Air

9. Actual Combustion with Moist Air & Fuel