Course detail

Fuel Economy

FSI-LPHAcad. year: 2020/2021

The course deals with the main characteristics of fossil fuels and their influence on the design and operation of boilers. The main part of lectures gives information about the preparation of coal for pulverized combustion, pulverizers and their construction, operation and safety. The final part deals with coal burners.

Learning outcomes of the course unit

This course enables students to design milling stations or control operation of more complicated milling circuits. Fuel manipulation in big power plants will be also introduced to students.


Sources and transformation of energy, boilers basics.


Not applicable.

Recommended optional programme components

Not applicable.

Recommended or required reading

Černý V., Janeba B., Teysler J.,: Parní kotle, Technický průvodce č. 32, SNTL, Praha, 1983
Skála Z.,: Palivové hospodářství, Brno VUT 1987
Atkins P.W.,: Physical Chemistry, Oxford Oxford University Press 1994
Singer J.G.,: Combustion, Fossil Power Systems: A Reference Book on Fuel Burning, Combustion Engineering Power Systems Group; 4th edition (October 1993)
J. Teyssler:Spalování popelnatých hnědých uhlí,SNTL Praha
P.Basu,C.Kefa,L.Jestin: Boilers and Burners,Design and Theory, Springer-verlag,New York

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.

Assesment methods and criteria linked to learning outcomes

Course-unit credit requirements: - Attendance at seminars - handing in notes from seminar calculations – working out a project.
The exam is written and oral.

Language of instruction


Work placements

Not applicable.


The course objective is to make students familiar with fossil fuels and their attributes. The emphasis is put on basic energy resource of the Czech Republic, which is coal. The course also provides with basic theoretical and calculation particulars for the design of milling stations.

Specification of controlled education, way of implementation and compensation for absences

Attendance at seminars is required, compensation of missed lessons to be negotiated with a teacher.

Classification of course in study plans

  • Programme M2I-P Master's

    branch M-ENI , 2. year of study, winter semester, 5 credits, compulsory

Type of course unit



26 hours, optionally

Teacher / Lecturer


1. Fossil fuels, classification and characteristic attributes of solid fuels.
2. Impact of fuel properties on boiler construction. Liquid fuels, attributes, manipulation, storage.
3. Gaseous fuels, properties, interchangeability of gases, Wobbe index.
4. Combustion quality control, combustion kinetics.
5. Inner and outer coaling, dump sites, transfer of coal, graining.
6. Milling circles, types, usage according to coal type.
7. Drying of coal, drying medium, milling station innertisation, waste vapour re-circulation.
8. Energetic rules for mechanical disconnecting of coal. Grindability, specific grind work, attributes of coal powder.
9. Tube mill, construction, operation and usage.
10. Middle-running mills, construction, operation and usage.
11. Hammer and impact mills, construction, operation and usage.
12. Supplementary devices of mill stations, powder bins, feeders.
13. Collective combustion of coal and biomass.

Computer-assisted exercise

13 hours, compulsory

Teacher / Lecturer


1. – 2. Fuel composition calculations, stoichiometric calculations with combustion air, power design of air fan.
3. – 4. Stoichiometric flue gas calculations, flue gas concentration calculations, uncooled flame temperature, flue gas dissociation.
5. – 6. The mill circle in a coal-fired boiler. Thermal balance, power calculation, operating conditions.
7. – 8. The mill circle in a lignite-fired boiler. Thermal balance.
9. – 10. The mill circle in a lignite-fired boiler. Power calculation, operating conditions.
11. – 12. Design of crude fuel tank; transport of fuel to the boiler.
13. Credit