Course code Ener3018

Credit points 3

Heat Sources

Total Hours in Course120

Number of hours for lectures32

Number of hours for seminars and practical classes16

Independent study hours72

Date of course confirmation16.03.2011

Responsible UnitInstitute of Energetics

Course developer

author Enerģētikas institūts

Raimunds Šeļegovskis

Dr. sc. ing.

Prior knowledge

Ener3027, Fundamentals of Heat Studies I

Ener3028, Fundamentals of Heat Studies II

Course abstract

In the course students acquire heat sources, its design and operation, water and steam boilers, those component parts: steam overheaters, water economizers, air preheaters. Boiler water parameters and water processing , the steam quality assurance the composition of flue gasses and measures of emission reduction are analysed. Principles and operation of heat pumps are obtained. The construction of heat supply networks and basics of their calculations, pipes and insulation, heat exchangers calculation methods are included.

Learning outcomes and their assessment

Knowledges: the types, structure and foperation of water and steam boilers and their separate components, as well as the construction and operation of the equipment providing them, the type of heat pumps and heat exangers, the construction, operation, construction and characteristics of heat nets - laboratory work, tests 1, 2, 3;
Abilities: to perform the assessment of the parameters of the boiler equipment, perform basic heat grid calculations, perform the basic heat exchanger calculation - home work, examination.
Competences: the assessment of the energy flow for the heat sources and transmission networks; the analysis, assessment of heat flow formation factors and the selection of heat generation and supply improvement solutions - examination.

Course Content(Calendar)

1. Classification of boiler equipment, major systems – 2 h.
2. Boiler operating principles, main parameters 2 h.
Test 1. Energy losses.
3. Water boilers - 3 h.
4. Steam boilers – 3 h.
5. Furnace air heaters.
6. Feeding water economizers.
7. Steam superheaters. Steam temperature control devices.
8. Boiler water parameters, preparation - 4 h
Test 2. Water preparation for boiler plants.
9. Maintaining of steam parameters
10. Measurement of heat flow and produced heat — 4 h.
11. Measurement of vapour humidity – 2 h.
12. Content of flue-gases. Reduction of emissions. 4 h
Test 3. Reduction of harmful emissions from boiler equipment.
13. Heat pumps. 2 h
Laboratory works. Determination of the air-water COP of the heat pump (SS). SS water-water COP detection – 4 h.
14. Construction of heat networks.
15. Heat network elements – 2 h
16. Basic calculations for thermal grid elements — 3 h
17. Heat exchange apparatus - 3 h
18. Calculation and selection of heat exchange apparatus - 4 h
19. Heat balance of boiler plant.
Home work. Calculation of the regenerative heat exchanger (LMTD).

Requirements for awarding credit points

A written exam.
The exam consists of three topics:
1. Boiler plants, their characteristics;
2. Boiler water preparation, emissions;
3. Heat nets, heat pumps and heat exchangers.
A student shall be admitted to the examination only if all 3 tests have been credited, the work of the laboratory has been worked and defended, and the home work has been credited.

Description of the organization and tasks of students’ independent work

Home work: Calculation of the heat exchanger must be performed.

Criteria for Evaluating Learning Outcomes

The assessment of the study course examination shall consist of the sum of the number of points obtained:
- the correct comprehensive, broad answer: 3 points,
- a correct answer with small incompleteness or small errors: 2 points,
- a reply containing only correct basic concepts but without explanation or containing essential errors: 1 point,
- there is no answer, the answer is wrong, there are very serious errors in the answer: 0 points.
By getting 9 points, there is the possibility of conducting interviews that result in a 10 – excellent mark being obtained by the student showing the appropriate knowledge and understanding.

Compulsory reading

1. Šeļegovskis R. Siltuma ieguves tehnoloģijas. 1. daļa. Metodiskais līdzeklis. Jelgava: LLU TF, 2008. 97 lpp. Pieejams:ācību materiāli. 2. Gengel Y.A. Heat transfer. A practical approach. NewYork: Mc Graw Hill, 2004. 908 p. 3. Shah R.K., Dusan P. S. Fundamentals of Heat Exchanger Design. John Wiley & Sons Inc. 2003. 941 p. 4. Malek M. Power boiler design. NewYork: Mac Graw Hill, 2005. 628 p.

Further reading

1. Соколов Е.Я. Теплофикация и тепловые сети. Москва: МЭИ, 1999. 471 с.

Periodicals and other sources

1. Enerģētika & Automatizācija. Ikmēneša žurnāls. Izdevējs SIA Biznesa Portāls. ISSN 1407-8589