Feasibility study on application of steam injectors as feedwater heaters in supercritical Rankine cycle

• Autorzy: Trela M. , Kwidziński R. , Głuch J. , Butrymowicz D.
• Języki publikacji: EN

Abstrakty

EN

In the paper, a mathematical model of steam-water injector is presented. The model was used in heat balance calculations of Rankine cycle to examine the influence of novel injector feedwater heater system on efficiency of supercritical 600 MW coal-burned turbine unit. Also, the geometry of the injector system suitable for the considered Rankine cycle was determined. Analysis of cycle efficiency showed that application of steam-water injectors is most beneficial in the low pressure part of the Rankine cycle. Efficiency rise could be gained due to the absence of thermal degradation during the injector operation and due to its pumping work. Heat transfer coefficients for the injectors reach high values in the range of 190-806 kW/m[^2]K. Therefore, the heat transfer area in the system of injectors appeared to be smaller by a factor of 60 compared to equivalent shell-and-tube feedwater heaters. Size estimations of the new feedwater injectors shows that the overall dimensions and weight of the proposed injector system, consisting of several injectors connected in parallel, is significantly smaller compared to common shell-and-tube heaters. Exact proportions, however, will depend on detailed design of the entire system geometry.

Słowa kluczowe

EN

feedwater heaters; steam-water injector; Supercritical Rankine cycle

PL

nadkrytyczny obieg Rankine'a; podgrzewacz wody kotłowej; strumienica parowo-wodna

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2009
• Tom: Vol. 30, no. 4
• Strony: 133--147
• Opis fizyczny: Bibliogr. 12 poz.,Rys., tab., wykr., w

Twórcy

autor

Trela M.

autor

Kwidziński R.

autor

Głuch J.

autor

Butrymowicz D.

• The Szewalski Institute of Fluid-Flow Machinery of the Polish Academy of Sciences, ul. Fiszera 14, 80-931 Gdańsk, Poland,

Bibliografia

• [1] NARABAYASHI T., OHMORI S., MORI M., ASANUMA Y., IWAKI CH.: Development of multi-stage steam injector for feedwater heaters in simplified nuclear power plant, Japan Soc. of Mech. Engineers Inter. J., Ser. B, 49 (2006), No. 2, 368-376, [http://www.jstage.jst.go.Jp/article/jsmeb/49/2/368/_pdf].
• [2] KWIDZIŃSKI R., TRELA M.: Mathematical model of the flow in steam-water injector. Proc. of The 5th Inter. Conf. on Transport Phenomena in Multiphase Sys. (HEAT 2008), Białystok, Poland, June 30 - July 3, 2008, Vol. 2, 429-434.
• [3] TRELA M., KWIDZIŃSKI R.: Influence of the expansion in a steam nozzle on the performance of two-phase ejector. Inter. Sem. on Ejector/Jet-pump Technology and Appl., Louvain-la-Neuve, Belgium, Sept. 7-9, 2009, Paper No. 10, CD-ROM.
• [4] TRELA M., BUTRYMOWICZ D.: Investigation of heat transfer in supersonic steam-water injector, Proc. 10th Int. Conf. on Heat Transfer and Renewable Sources of Energy 2004, Międzyzdroje-Szczecin, Poland, 645-652.
• [5] TRELA M, KWIDZIŃSKI R., BUŁA M.: Maximum discharge pressure of supercritical two-phase steam injector, Archives of Thermodynamics, 25 (2004), No. 1, 41-52.
• [6] TRELA M, KWIDZIŃSKI R., BUTRYMOWICZ D., JAWOREK A., DUMAZ P.: Studies of physical phenomena of two-phase flow in steam-water injector, 11th INTER. TOPICAL MEETING ON NUCLEAR REACTOR THERMAL-HYDRAULICS (NURETH-11), AVIGNON, FRANCE, OCTOBER 2-6, 2005. CD-ROM, PAPER No. 090.
• [7] IDELCHIK I. E.: Handbook of Hydraulic Resistance, (3rd EDITION), BEGELL HOUSE, NEW YORK 1996.
• [8] TRELA M., KWIDZIŃSKI R., GŁUCH J., BUTRYMOWICZ D.: Study on application of steam-water injectors as feedwater heaters in steam power plants, POLISH MARITIME RESEARCH, ACCEPTED FOR PUBLICATION IN 2009.
• [9] BUTRYMOWICZ D., GŁUCH J., HAJDUK T., TRELA M., GARDZILEWICZ A.: Analysis of fouling thermal resistance in feedwater heaters in steam power plants, EATERS IN STEAM POWER PLANTS, Polish Maritime Research, accepted for publication in 2009.
• [10] GŁUCH J., TRELA M.: Geometry estimation of shell-and-tube feedwater heaters for supercritical 600 MW power plant, The Szewalski Institute of Fluid-Flow Machinery, Report No. 180/09 (2009) (in Polish).
• [11] KWIDZIŃSKI R., GŁUCH J., TRELA M.: Geometry calculations of LP ejector feedwater heaters - Part 2, The Szewalski Institute of Fluid-Flow Machinery, Report No. 318/09 (2009) (in Polish).
• [12] OHMORI S., NARABAYASHI T., MORI M., IWAKI CH., ASANUMA Y., GOTO SH.: Development of technologies on innovative-simplified nuclear power plant using high-efficiency steam injectors - System outline and endurance test of low-pressure steam injectors, J. of Power and Energy Systems, Vol. 1 (2007), No. 1, 99-110, [http://www.jstage.jst.go.jp/article/jpes/l/l/99/_pdf].