Engineering, Energy, Transport AIC

Tkachenko Stanislav Y. – Doctor of Technical Sciences, Full Professor, Head of the Department of

Thermal Power Engineering of Vinnytsia National Technical University (Khmelnitsky highway, 95,

Vinnytsia, Ukraine, e-mail: stahit6937@gmail.com), ORCID 0000-0002-4654-2062.

StepanovaNataliya D. – PhD, Associate Professor of the Department of Thermal Power Engineering of

Vinnytsia National Technical University (Khmelnitsky highway, 95, Vinnytsia, Ukraine, e-mail:

Stepanovand@i.ua), ORCID 0000-0002-4654-2062.

Known methods for preparing saturated steam for use in a heat engineering system are analyzed.

It was established that the flow rate of cooling water was overestimated in them, since part of this water is

drained into the drainage system of the power plant and contributes part of the heat of the primary

superheated steam there. In the proposed method for removing steam overheating before it is fed to a

specific heat exchanger, it is proposed to use condensate from the same heat exchanger, moreover, due to

evaporation of a part of the condensate (estimated 10 ... 20%), the metal consumption of the condensate

drainage system decreases. The heat and mass transfer processes in the closed loop “heat exchanger –

condensate line – desuperheater and separation device –– steam of saturated saturated steam – heat

exchanger” are analyzed, the balance equations are compiled, the degree of uncertainty of the heat

transfer and hydrodynamic processes in two-phase media is analyzed. A steam preparation system has

been developed for a heat-technological consumer, in which by using all the condensate obtained in the

steam heat exchanger as a cooler and observing a certain distance between the lower tube sheet of the

heat exchanger and the central axis of the desuperheater, the problems of condensate drainage, its

efficient use and removal of steam overheating are achieved.

[1] Tkachenko, S., Stepanova, N. (2008) Samozakypaiuchi potoky v drenazhnykh kanalakh

teplotekhnolohichnykh system .Monohrafiia [Self-accumulating flows in drainage channels of heatengineering

systems/ Monograph]. – Vinnytsia: UNIVERSUM-Vinnytsia [in Ukrainian].

[2] Kolesnikov, V., Nechaev, Y. (1980) Teplosilovoe hozyaystvo saharnyih zavodov [Thermal economy

of sugar factories] Moscow: Pischevaya prom-st [in Russian].

[3] Galin, N., Kirillov, L. Teplomassoobmen (v yadernoy energetike) [Heat exchange (

in nuclear power)] Moscow: Energoatomizdat [in Russian].

[4] Rifert, V., Gorin, V., Barabash, P., Sereda, V. (2011) Condensation inside horizontal tubes: state of

the problem and analysis of research results, 4, 57 - 68, Transactions of Academenergo.

[5] Lee, H., Mudawar, I., Hasan, M. (2013) Flow condensation in horizontal tubes, 66, 31 - 45,

International Journal of Heat and Mass Transfer.

[6] Xiaoyong, W., Xiande, F. , Rongrong, S. (2012) A comparative study of heat transfer coefficients for

film condensation., 3, 1 – 9, Energy Science and Technology.

[7] Garcia-Valladares, O. (2003) Review of in-tube condensation heat transfer correlations for smooth

and microfin tubes, 24, 6 - 24, Heat Transfer Engineering.

[8] Tkachenko, S., Stepanova, N., Stepanov, D. (2003) Dekl. Pat. 61581 UA, MKY F22G5/12. Sposib

zniattia perehrivu pary [Way to remove overheating of the steam], No 2003032028; Zaiavleno

07.03.2003; Opubl. 17.11.2003, Biul.№11 [in Ukrainian].

[9] Shiu, B., Yamamoto, S., Yuan, X. (2004) Application of Preconditioning Method to Gas Liquid

Two-phase Flow Computations, 126, 10, 606–612, Transaction of the ASME Journal of Fluids

Engineering.

[10] Mor, M., Gany, A. (2004) Analysis of Two-phase Homogeneous Bubbly Flows Including Friction

and Mass Addition, 126, 1, 102–109, Transaction of the ASME. Journal of Fluids Engineering [in

English].

[11] Baldina, O., Lokshin, V., Peterson, D. (1978) Gidravlicheskiy raschet kotelnyih agregatov :

(Normativnyiy metod) [Hydraulic calculation of boiler units (Regulatory method)] Moscow:

Energiya [in Russian].

[12] Tkachenko, S., Stepanova, N., Stepanov, D. (2000) Vtraty tysku v mistsevykh oporakh pry techii

dvofaznykh potokiv [Loss of pressure in local supports during two-phase flows], 1, 43–46, Visnyk

VPI [in Ukrainian].