Course detail
Combustion and Fuels
FSI-LPS Acad. year: 2022/2023 Winter semester
The subject deals with the properties of fuels and the influence of these properties on the construction and operation of boilers of power equipment. Another area is the fuel management of solid and gaseous fuels, including mills and other mechanical treatment technologies, ie crushing, grinding and drying coal, construction of coal mills, operation and safety regulations of grinding stations, coal handling (landfilling and transport), biomass chipping and pelleting.
The chemistry of combustion reactions and reaction kinetics are another area that will be introduced to the students. this knowledge will be followed by the topics of burners and combustion chambers.
Language of instruction
Czech
Number of ECTS credits
5
Supervisor
Department
Learning outcomes of the course unit
Prerequisites and co-requisites Knowledge of physical chemistry with focus on combustion of fossil and alternative fuels, as well as in the field of fuel preparation and fuel economy in industrial applications.
Prerequisites
Knowledge of thermodynamics, basic laws of thermodynamics, heat transfer and gas and vapor flow. Knowledge of practical application of fuel combustion, boiler, furnace or small fuel consumers is recommended.
Planned learning activities and teaching methods
The course is taught in the form of lectures that have the character of explanation of basic principles and theory of the given discipline. The exercise is focused on practical mastery of the subject matter covered in the lectures.
Assesment methods and criteria linked to learning outcomes
For granting the credit is required attendance in exercises, submission of performed calculations, as well as submitting the project according to the assignment. The exam is written and oral.
Aims
To acquaint students with solid and gaseous fuels (especially coal, biomass and natural gas) and their properties. To provide theoretical and computational data for the design of fuel management, grinding equipment and stations. The second part of the course acquaints students with the principles of combustion, combustion kinetics, burners and combustion chambers.
Specification of controlled education, way of implementation and compensation for absences
Controlled participation in lessons: Exercises are compulsory. The student will be compensated for absence by agreement with the tutor. Lectures are optional.
The study programmes with the given course
Programme N-ETI-P: Power and Thermo-fluid Engineering, Master's
specialization ENI: Power Engineering, compulsory
Type of course unit
Lecture
26 hours, optionally
Teacher / Lecturer
Syllabus
1. Classification and characteristic properties of solid fuels – coal, biomass, waste.
2. Influence of fuel properties on boiler construction.
3. Coaling, coal transport, crushing, grinding circuits, use according to the type of coal.
4. Drying, drying medium, vapors,
5. Energy laws of mechanical decoupling of coal. Grindability, specific grinding work, properties of coal powder. Pipe mill: construction, operation, use
6. Medium mills, fan and hammer mills: construction, operation, use.
7. Auxiliary equipment of mills, powder containers, feeders. Inertization of the environment. Solid fuel burners.
8. Liquid fuels, properties chap. of fuels, fuel management of liquid fuels
9. Fuel gases, properties, gas interchangeability, Wobbe index.
10. Fuel management of gaseous fuels, gas burners.
11. Basic combustion process, chemical equilibrium of combustion reactions, stoichiometry, combustion kinetics.
12. Influence of fuel properties on combustion, temperature of uncooled flame
13. Combustion chambers of gas turbines
Computer-assisted exercise
26 hours, compulsory
Teacher / Lecturer
Syllabus
. Fuel composition calculations, combustion air stoichiometric calculations,
2. Design of air fan power.
3. Stoichiometric calculations with flue gas, conversion of flue gas concentrations,
4. Uncooled flame temperature, flue gas dissociation.
5. Mill circuit at the boiler burning black coal. Heat balance, power calculation, operating states.
6. Heat balance of ring mill.
7. Heat balance of the fan mill.
8. Weight and heat balance of the dryer.
9. Gas turbine combustion chamber design.
10. Gas turbine combustion chamber design.