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Method of controlling the volume of combustion products at different boiler loads

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Category: Content №1 2024

Last Updated on 29 February 2024

Published on 30 November -0001

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Authors:

V.Kryvda*, orcid.org/0000-0002-0930-1163, Odesa Polytechnic National University, Odesa, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.Brunetkin, orcid.org/0000-0002-6701-8737, Odesa Polytechnic National University, Odesa, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

K.Beglov, orcid.org/0000-0002-5277-2577, Odesa Polytechnic National University, Odesa, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

T.Markolenko, orcid.org/0000-0002-3639-2232, Odesa Polytechnic National University, Odesa, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

I.Lutsenko, orcid.org/0000-0001-6406-2364, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2024, (1): 100 - 104

https://doi.org/10.33271/nvngu/2024-1/100

Abstract:

Purpose. Development of a method for controlling the volume of combustion products at different load of boiler equipment. Achieving the objective may allow controlling the flue gas temperature and, consequently, the efficiency to increase it.

Methodology. Control of the flue gas volume value on the basis of determining the appropriate composition of the fuel gas mixture.

Findings. The effect of flue gas temperature increase at use of fuel gases of lower calorific value and increase in ballast gases quantity is revealed. The latter can be the air used as an oxidising agent at its considerable excess. The mechanism of such an effect due to the increase in the quantity and velocity of flue gases is suggested. A parameter determining the volume of flue gases produced per unit calorific value of various fuel gases is proposed. On the basis of this parameter the method for calculating the composition of the mixture of different gases to ensure the constancy of the flue gas volume at variable load is proposed

Originality. On the example of the results of verification thermal calculation the change in flue gas temperature and efficiency value is considered. The non-standard character of their change is revealed. In contrast to the case of using fuel gas of constant composition with increasing load, the temperature of flue gases remained close to constant, and the value of efficiency increased.

Practical value. The obtained results indicate the possibility of controlling the flue gas temperature and boiler efficiency at a given load. This allows one, unlike the case of using fuel gas of constant composition, to increase the efficiency exactly at maximum load avoiding getting into the condensate mode at minimum load. There is a possibility to save fossil gas and, consequently, to reduce the greenhouse share in CO₂ emissions.

Keywords: gas mixture, boiler efficiency, flue gas temperature, flue gas volume

References.

1. UN website. Solutions/ClimateAction. The Paris Agreement (n.d.). Retrieved from https://www.un.org/ru/climatechange/paris-agreement#.

2. Deutschland importiert immer mehr Strom (06.09.2023). Retrieved from https://www.dw.com/de/deutschland-importiert-immer-mehr-strom/a-66735523.

3. European Parliament website (n.d.). Press room/Taxonomy: MEPs do not object to inclusion of gas and nuclear activities. Retrieved from https://www.europarl.europa.eu/news/en/press-room/20220701IPR34365/taxonomy-meps-do-not-object-to-inclusion-of-gas-and-nuclear-activities.

4. Qatar supplies gas to Europe, vying with US to replace Russia supply (2023). Retrieved from https://www.reuters.com/markets/commodities/qatarenergy-shell-agree-27-year-lng-supply-2023-10-18/.

5. Soroka, B. S., Vorobyev, N. V., & Bershadsky, A. I. (2016). Natural Gas Saving by Replacement the Last for Process Gases while Heating Middle and High Temperature Furnaces. Part 1. Influence of Low-Calorie Gases Characteristics on Fuel Flow Rate in Furnaces. Energy technologies and resource saving, 1, 11-22.

6. Soroka, B. S., Vorobyev, N. V., & Karabchievskaya, R. S. (2016). Natural Gas Saving by Replacement the Last for Process Gases While Heating Middle and High Temperature Furaces. Part 2. Numerical Determination of Fuel Flow Rate, of Fuel Use Energy and Environmental Characterstics by Assignment of Fuel Type and Composition. Energy Technologies and Resource Saving, 2, 3-13.

7. Pylypenko, R., Smiyan, B., Tsvetkov, S., Pikashov, V., Melni­kov, R., & Logvinenko, D. (2022). Substitution Of Natural Gas And Mixtures Of Process Gases. Energy Technologies & Resource Saving, 1, 24-32. https://doi.org/10.33070/etars.1.2022.03.

8. Vries, H., & Levinsky, H. (2019). Flashback, burning velocities and hydrogen admixture: Domestic appliance approval, gas regulation and appliance development. Applied Energy, 259, 114116. https://doi.org/10.1016/j.apenergy.2019.114116.

9. Demchenko, V.G. (2011). Ways to increase the efficiency of boiler design. Hirnycha Elektromechanika ta Avtomatika, 87, 155-159.

10. Bălănescu, D., & Homutescu, V. (2018). Experimental investigation on performance of a condensing boiler and economic evaluation in real operating conditions. Applied Thermal Engineering, 143, 48-58. https://doi.org/10.1016/j.applthermaleng.2018.07.082.

11. Taler, J., Trojan, M., Dzierwa, P., Kaczmarski, K., Węglowski, B., Taler, D., …, & Jaremkiewicz, M. (2023). The flexible boiler operation in a wide range of load changes with considering the strength and environmental restrictions. Energy, 263, B, 125745. https://doi.org/10.1016/j.energy.2022.125745.

12. Sigal, I. Ya., Smikhula, A. V., Marasin, O. V., & Lavrentsov, E. M. (2015). The increasing duration of operation of boiler houses and heat electro power stations above 12 MW in Ukraine. Energy Technologies and Resource Saving, 3, 46-53.

13. Bezhan, V., & Zhitarenko, V. (2020). Modeling and Analysis of Energy Efficiency Parameters of Medium Pressure Boilers Using a Mixture of Natural and Blast Furnace Gases Taking into Account Air Intakes. NTU “KhPI” Bulletin: Power and Heat Engineering Processes and Equipment, (2), 32-39. https://doi.org/10.20998/2078-774X.2020.02.05.

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