# Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science

DEVELOPMENT OF CONDENSER MATHEMATICAL MODEL FOR RESEARCH AND DEVELOPMENT OF WAYS TO IMPROVE ITS EFFICIENCY

DOI: 10.5937/jaes0-27517
This is an open access article distributed under the CC BY 4.0

Almaty University of Energy and Communications named after Gumarbek Daukeev, Institute of Heat Power Engineering and Heat Engineering, Department of Thermal Power Plants, Almaty, Republic of Kazakhstan

Konstantin Aronson
Ural Federal University named after the First President of Russia B.N. Yeltsin, Department of Turbines and Engines, Yekaterinburg, Russian Federation

Nina Borissova
Almaty University of Energy and Communications named after Gumarbek Daukeev, Institute of Thermal Power Engineering and Heat Engineering, Department of Thermal Power Plants, Almaty, Republic of Kazakhstan

The condensing unit is one of the most important elements of the steam turbine of a combined heat and power plant. Defects in elements of the condensing unit lead to disturbances in the steam turbine operation, its failures and breakdowns, as well as efficiency losses of the plant. Therefore, the operating personnel need to know the cause of the malfunction and to correct it immediately. There are no diagnostic models of condensers in the Republic of Kazakhstan at the moment. In this regard, a mathematical model of a condenser based on the methodology of Kaluga Turbine Plant (KTP) has been developed. The mathematical model makes it possible to change the input parameters, plot dependency diagrams, and calculate the plant efficiency indicators. The mathematical model of the condenser can be used to research ways for the improvement of the condensing unit efficiency, for diagnostic purposes of the equipment condition, for the energy audit conduction of the plant, and in the training when performing virtual laboratory research. Using static data processing by linear regression method we obtain that the KTP methodology of condenser calculation is fair at cooling water temperature from 20 °C to 24 °C, but at cooling water temperature from 20 °C to 28 °C, the methodology of JSC "All-Russia Thermal Engineering Institute" (JSC "VTI") is used. One of the ways to increase the condenser efficiency has been proposed. It is the heat transfer augmentation with riffling annular grooves on tubes. This method increases the heat transfer coefficient by 2%, reduces the water subcooling of the heating steam by 0.9 °C, and decreases the cooling area by 2%.

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1. Iglin, P. V. (2016). Improvement of the operational control system for the steam turbine condenser based on the correction of the calculation methodology for the oxygen content in the condensate. PhD thesis. Kirov.

2. USSR Ministry of Energy and Electrification. (1985). Methodological instructive regulations on the operation of steam turbines condensing units of power generation plants. RD 34.30.501 (MIR 34-70-122-85). https://fi les.stroyinf.ru/ Data2/1/4294817/4294817716.htm

3. Aronson, K. E. (2008). Development and implementation of the monitoring system of the heat-exchange apparatuses condition of the steam turbine plants as a component of the CHP information packages. Doctoral thesis. Ural State Technical University, Ekaterinburg.

4. Khaet, S. I. (2004). Development and implementation of the diagnostic module elements for monitoring the steam turbine condensation plant condition. PhD thesis. Ekaterinburg.

5. Murmansky, B. E., Aronson, K. E., Brodov, Yu. M. (2017). An expert system for diagnostics and estimation of steam turbine components condition. Journal of Physics: Conference Series, 891, 012279. https:// doi.org/10.1088/1742-6596/891/1/012279

6. Merkulov, V. A. (2004). Research and development of the ways to increase the efficiency and reliability of the condensing equipment of cogeneration turbines. PhD thesis. Ivanovo.

7. Brodov, Yu. M., Aronson, K. E., Ryabchikov, A. Yu., Nirenstein, M. A. (2014). Heat transfer augmentation during water steam condensation on twisted profile tubes. WIT Transactions on Ecology and the Environment, 190, 479–490. doi: 10.2495/EQ140461

8. Vasilevsky, N. S., Kuvaldin, A. E. (2018). Heat transfer augmentation during steam condensation with the help of knurled tubes. Proceedings of the 3rd Scientific and Technical Conference of Young Scientists of Ural Power Engineering Institute. Ural Federal University named after the first President of Russia Boris Yeltsin, Ekaterinburg.

9. Murmansky, I. B. (2018). Perfection of the multistage steam jet ejectors of the steam turbine condensing units. PhD thesis. Ekaterinburg.

10. Heat Exchange Institute. (2012). Standards for steam surface condensers. 11th ed. Heat Exchange Institute, Cleveland.

11. World Science: Problems and Innovations. A collection of articles of XLIII International Scientific Conference. Part 1. (2020). The International Center of Scientific Cooperation "Science and Enlightenment", Penza.

12. Junusova, M. D. (2014). Modeling of the convective heat transfer processes in calculations of the energy heat-exchange apparatuses. Master thesis. Almaty.

13. Kalinin, E. K., Dreitzer, G. A., Kopp, I. Z., Myakochin, A. S. (1998). Efficient heat-transfer surface. Energotomizdat, Moscow.