2013 1(12)

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   Short abstract

 

Pages:

359 - 362

Language:

RU

Ref.:

5


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2013_1(12)_64.pdf

 

 

SWELLING OF WATER LEVELS IN HEAT EXCHANGERS

Sintsova T.G., Trifonov N.N., Sukhorukov Yu.G., Nikolaenkova E.K.

Central Boiler and Turbine Institution (CKTI), St.Peterburg, Russia


Citation:

Sintsova, T.G., Trifonov, N.N., Sukhorukov, Yu.G. and Nikolaenkova, E.K., (2013) Swelling of water levels in heat exchangers, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(12), PP. 359 - 362.


Keywords:

protection system response; level swelling; condensation; metastable fluid; steam bubble growth


Abstracts:

At present, no calculation methods are available to substantiate response rates of the steam turbine protection system preventing the steam backflow and water ingress of moisture carried by the steam flow from the regeneration system heaters to the turbine wheel space in dynamic operating modes. Known calculation methods applied to determine the water level swelling in heat exchangers are based on the analysis of steam bubble floating up rates in water when the pressure drops. It enables the determination of level swelling values but do not does not enable the calculation of the level swelling rate and time, formation of steam and its separation from water and consequently the substantiation of needed response rate of the protection system. Several methods have been suggested to calculate pressure drop methods in heat exchangers of the regeneration system and related formation of nucleus of consistently growing bubbles, as well as a formula to calculate the bubble growth rates provided that no gases are available in water. The proposed speculations enable the determination of the time for basic stages of bubble formation and growth in deaerated water in heat exchangers of the steam turbine regeneration system and substantiate the turbine protection system response to the steam backflow and ingress of moisture carried by the steam flow into the turbine.


References:

  1. Sukhorukov, Yu.G., Yermolov, V.F. and Trifonov, N.N. (2008), "Method of calculating the level of the water swelling and protective equipment excluding her from entering the flow part of the turbine with a reverse flow of steam from the mixing heaters", Teploenergetika, no.2, рp. 72 - 76.

  2. Fragin, M.S. (2011), "The effect of the volume of steam and water in regenerative heaters and network to work with the steam turbine load shedding", Elektricheskie stantsii, no.2, pp. 24 - 31.

  3. Fragin, M.S. (2005), Regulirovanie I maslosnabzhenie parovych turbin. Seriya "Problemy energetiki", vypusk 6 [Regulation and oil supply steam turbines: the present and the near future. Series "Problems of power", issue 6], Energotekh, St. Petersburg, Russia.

  4. Khlestkin, D.A. (2007), Teoriya i raschet metastabylnykh potokov [Theory and Design of metastable flows], IIKTS "Elf3", Moscow, Russia.

  5. Rassadkin, Yu.P. (2008), Voda obyknovennaya i neobyknovennaya [Water ordinary and extraordinary], Galereya STO, Moscow, Russia.

 

 
     

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