Monitoring strategy of supervisory system of a steam distribution network by establishing qualification techniques of two-phase flow
Keywords:
two-phase flow, identification, process controlAbstract
Devices traditionally operated in regional steam networks are neither able to determine the liquid content of the flowing medium nor the velocity distribution and volume fraction of the phases having incidentally different velocities at the consumers’ end of the network. The established supervisory system providing intelligent monitoring enables to address these problems. Besides the traditional measurement units required for the operation of the supervisory system, it is crucial to build special measuring devices (in order to obtain information about velocity distribution and the volume occupation of the phases in two phase flow, and to measure the condensate flow toward the environment) with unique design as well, and the mobile communication based transfer of measurement data to the central computers of the supervisory system is also needed. The developed monitoring strategy enables the on-line determination of the correct mass- and energy balance during the process.
References
Árva, P., Nagy, D., Szeifert, F. (1979). Vegyipari rendszerek. El. füzet, VVE jegyzet, Veszprém, 1–16.
Coleman, J. W., Garimella, S. (2003). Two-phase flow regimes in round, square and rectangular tubes during condensation of refrigerant R134a. In: International Journal of Refrigeration, 26. 1. 117–128. https://doi.org/10.1016/S0140-7007(02)00013-0
El Hajal, J., Thome, J. R., Caballini, A. (2003). Condensation in horizontal tubes, part1: two-phase flow pattern map. In: International Journal of Heat and Mass Transfer 46. 18. 3349–3363. https://doi.org/10.1016/S0017-9310(03)00139-X
Gerber, A. G., Kermani, M. J. (2004). A pressure based Eulerian-Eulerian multi-phase model or non-equilibrium condensation in transonic steam flow. In: International Journal of Heat and Mass Transfer, 47. 10–11. 2217–2231. https://doi.org/10.1016/j.ijheatmasstransfer.2003.11.017
Huhn, J., Wolf, J. (1978). Kétfázisú áramlás (Gáz-folyadékrendszerek). Műszaki Könyvkiadó : Budapest, 1–183.
Jancskar, A. I., Sari, Z., Szakonyi, L., Ivanyi, A. (2008). Diffuse Interface Modeling of Liquid-Vapor Phase Transition with Hysteresis. In: Physica B, 403. 2–3. 505–508. https://doi.org/10.1016/j.physb.2007.08.085
Schaffarth, A. (2001). Modeling of condensation in horizontal tubes. In: Nuclear Engineering and Design, 204. 1–3. 251–265. https://doi.org/10.1016/S0029-5493(00)00329-0
Sun, Y., Beckermann, C. (2004). Diffuse interface modeling of two-phase flows based on averaging: mass and momentum equatios. In: Phisica D, 198. 3–4. 281–308. https://doi.org/10.1016/j.physd.2004.09.003
Szakonyi, L. (1983). Cementgyári nyerslisztgyártás rendszertechnikai vizsgálata. Doktori értekezés, Veszprémi Vegyipari Egyetem, 1–84.
Szakonyi, L., Jancskar, A. I., Sari, Z. (2006). Energetic Model for an Elementary Unit of a Steam Network. In: Pollack Periodica, An International Journal for Engineering and Information Sciences, 1. 3. 91–102. https://doi.org/10.1556/Pollack.1.2006.3.7
Szakonyi, L. (2007). Energetic model of an elementary pipe-segment of a steam-water network. In: Pollack Periodica, An International Journal for Engineering and Information Sciences, 2. 1. 63–78. https://doi.org/10.1556/Pollack.2.2007.1.6
Szakonyi, L. (2008). Új infokommunikációs technológia kidolgozásának, regionális hasznosításának képzéskorszerűsítésre gyakorolt hatása a mérnök informatikus szakon. Informatika a felsőoktatásban Konferencia, Debrecen, 27–29, paper 149, 1-10.
Szakonyi, L., Iványi, P., Sari, Z. (2008a). Developing of an Info-communication Technology for the Operating and Controlling of a Saturated Steam Network. ICEE 2008 International Conference on Engineering Education, Pécs-Budapest, Hungary, 222.
Szakonyi, L., Iványi, P., Sari, Z. (2008b). Measurement Based Flow Regime and Velocity Profile Calculation of High Pressure Steam Network in Saturated State. CST2008: The Sixth International Conference on Engineering Computational Technology, Athens, Greece, 16.
Szakonyi, L. (2009a). Investigation and Control of a Regional Steam-Distribution Network under Two-Phase Flow Conditions. In: Studies in Informatics and Control, National Institute for Research & Development in Informatics, 18. 2. 119–126.
Szakonyi, L. (2009b). Városi vízgőzhálózat modellezése és identifikációja, Doktori (PhD) értekezés, Pannon Egyetem, Veszprém, 1–155.
Downloads
Published
Issue
Section
License
Copyright (c) 2010 Szakonyi Lajos, Sári Zoltán, Jancskárné Anweiler Ildikó
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
