Problems of condensation heat transfer in power plant heat exchangers

• Autorzy: Butrymowicz D. , Trela M.
• Języki publikacji: EN

Abstrakty

EN

The paper deals with the problems of the influence of inert gases, vapour superheating, and fouling on condensation heat transfer in power plant heat exchangers. The performance estimation of a recuperative heat exchanger under conditions of fouling and presence of inert gases and vapour superheating is extremely important for the diagnostic codes of the turbine units. Basing on the one dimensional model the influence of fouling and air-concentration on the distribution of both the pertinent heater temperatures and heat flux was investigated. It appeared that inert gases play a dominant role in the case when its concentration is sufficiently high. It may be concluded that the proposed 1D model provides a very efficient method for heat transfer evaluation of heat exchangers. The effect of a strong vapour superheating on performance of heat exchanger has been discussed. It may be concluded that non-condensation zone in these heaters depends not only on vapour superheating but also on the heat transfer surface area.

Słowa kluczowe

EN

power plant heat exchangers; condensation heat transfer; inert gases; fouling

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN
• Czasopismo: Transactions of the Institute of Fluid-Flow Machinery
• Rocznik: 2003
• Tom: nr 113
• Strony: 107--118
• Opis fizyczny: Bibliogr. 6 poz., wykr.

Twórcy

autor

Butrymowicz D.

• Institute of Fluid Flow Machinery of the Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland

autor

Trela M.

• Institute of Fluid Flow Machinery of the Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland

Bibliografia

• 1 Nowak W.:Theory of Recuperative Heat Exchangers,Publishers of theTechnical University of Szczecin, Szczecin, 1993, (in Polish).
• 2 Zaleski T.: Mathematical Models of Heat Erchangers, Publ. of the Inst. of Chem, Eng. of Polish Academy of Sci., Gliwice, 1995, (in Polish).
• 3 Butrymowicz D, Trela M.: Effects of fouling and, inert gases on performance of recuperative feedwater heaters, Archives of Thermodynamics, Vol. 23, No. 1-2.127-140, 2001.
• 4 Berman L.D., Flrks S.N.: Calculation of recuperative feed-water heaters for steam condensation from air-steam mixture, Teploenergetika, No. 7, 1959, l 7-83, (in Russian).
• 5. Butrymowicz D. Trela M.: Modelling of Heat Thansfer in Recuperative Heat Exchangers During Steam Condensation Report of the IFFM of Polish Academy of Sci. No. 458/96, Gdańsk 1996 (in Polish)
• 6. Marto P.J : Heat transfer and two-phase flow during shell-side condensation, Heat Transfer Eng. Vol. 5, No 1-2, 1984, 31-60