Understanding Combustion Thermodynamics — Lesson 1

This lesson covers the application of thermodynamics to combustion, particularly in combustors. It delves into how concepts such as steady flow energy equation and entropy balance of a control volume can be applied to combustion. The lesson also discusses the impact of chemical reactions on combustion, the role of reservoirs in maintaining high temperatures, and the process of burning fuel to release heat. It further explains the concept of combustion stoichiometry, the process of combustion of fuels, and the application of energy balance and entropy balance to such devices. The lesson also touches on the practical aspects of combustion, such as the need for excess air to stabilize combustion and the impact of supplying excess air.

Video Highlights

01:27 - Combustion stoichiometry
07:05 - Stoichiometric air fuel ratio
13:30 - Definition of equivalence ratio
17:58 - Dew point temperature of combustion products
30:58 - Dew point temperature of products due to humidity in supplied air

Key Takeaways

- Combustion involves the application of thermodynamics concepts such as steady flow energy equation and entropy balance.
- Chemical reactions play a crucial role in combustion, particularly in the burning of fuel.
- Supplying excess air in combustion can stabilize the combustion but can also lead to the formation of pollutants.
- The combustion of different fuels, such as methane and Indian rice husk biomass fuel, involves different processes and considerations.
- The dew point temperature of the products is an important factor in combustion as it determines whether the water vapor in the product stream will condense.