Generalized approach to modes analysis of modern heat supply systems

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Authors:

A.A. Malinovskyi, Doctor of Technical Sciences, Professor, State Higher Educational Institution Lviv Polytechnic National University, Institute of Power Engineering and Control Systems, Head of the Department of Electrical Supply to Industry, Cities and Agriculture, Lviv, Ukraine,e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., orcid.org/0000-0001-9765-3494

V.H. Turkovskyi, Candidate of Technical Sciences, Associate Professor, State Higher Educational Institution Lviv Polytechnic National University, Institute of Power Engineering and Control Systems, Associate Professor of the Department of Electrical Supply to Industry, Cities and Agriculture, Lviv, Ukraine,e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., orcid.org/0000-0003-1869-8139

A.Z. Muzychak, Candidate of Technical Sciences, State Higher Educational Institution Lviv Polytechnic National University, Institute of Power Engineering and Control Systems, Associate Professor of the Department of Electrical Supply to Industry, Cities and Agriculture, Lviv, Ukraine,e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., orcid.org/0000-0002-6330-1076

M.B. Sabat, Candidate of Technical Sciences, State Higher Educational Institution Lviv Polytechnic National University, Institute of Power Engineering and Control Systems, Senior lecturer of the Department of Electrical Supply to Industry, Cities and Agriculture, Lviv, Ukraine,e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., orcid.org/0000-0001-7448-0615

Abstract:

Purpose. Solving analysis problems and improvement of modern physically inhomogeneous heat supply and heating systems. Developing the mathematical models that are suitable for applying all the features of the theory of energy circuits.

Methodology. The study was conducted through applying fundamental laws of physics, fundamental principles of the theory of energy circuits and sectoral theories of hydraulic and electrical circuits, formalized methods for analysis of utility networks, methods of mathematical modeling.

Findings. Contour and nodal mathematical models were improved as an instrument of a generalized approach to the modes analysis of heat supply and heating systems. It has been shown that the mathematical models can adequately reproduce modes of studied systems. The models take into account the nature of the power and features of the two forms of mechanical energy – kinetic and potential. It is important for the analysis of mine heating modes, as there are considerable differences in height and emergency modes, due to leakages of heat-transfer agent to the environment.

Originality. The generalized approach complies with all the requirements by principles of the metrical and energy analogies. It allows applying previously unavailable tools for the modes analysis of heating systems, in particular, power balance. The important advantage of this approach is the observance of unified system variables, which allows describing the phenomenon in circuits of different physical nature.

Practical value. The developed mathematical models provide an effective tool for analysis of the planned and existing modern heat supply systems and their optimization in terms of minimizing energy costs.

References.

1. Boronin, V. F, Dotsenko, S. A. and Zhukov, Ju. P., 2014. Heat saving ways in the mines. Ugol' Ukrainy, 11, pp. 14–16.

2. Samusia, O. V., 2014. The methodology for calcula-ting the costs per unit for thermal energy generation using heat-pine installations in coal mines. Scientific collected articles of national Mining University, 44, pp. 68–76.

3. Starychenko, L. L., 2012. Current issues of state policy concerning coal industry. Ugol' Ukrainy, 10, pp. 3–7.

4. Malinovskyi, A. A., Turkovskyi, V. H. and Muzychak, A. Z., 2014. Methodology of analysis and improvement of modes of district heating systems with direct connection of consumers. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 11, pp. 85–91.

5. Mikhailovsky, E. M. and Novitsky, N. N., 2015. A modified nodal pressure method for calculating flow distribution in hydraulic circuits for the case of unconventional closing relations. St. Petersburg Polytechnical University Journal. Physics and Mathematics, 1(2), pp. 120–128.

6. Pyrkov, V. V., 2014. Energy efficiency of automatic balancing of new and modernized heat and hot water supply systems. Danfoss INFO, 1‒2, pp. 12–17.

7. Sauh, S. E., 2011. Mathematical modeling of the po-wer circuits. Electronic modelling, 33(3), pp. 3–12.

8. Muzychak, A., 2015. System of mode variables of energy circuits. Energy Engineering and Control Systems, 2, pp. 91–100.

9. Kyrylenko, O. V., Seheda, M. S., Butkevych, O. F. and Mazur, T. A., 2013. Mathematical modeling in electric power industry. Lviv: Vydavnytstvo Lvivskoi politekhniky.

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ISSN (print) 2071-2227,
ISSN (online) 2223-2362.
Journal was registered by Ministry of Justice of Ukraine.
Registration number КВ No.17742-6592PR dated April 27, 2011.

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