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Agnieszka Kijo-Kleczkowska

References Gajewski W., Kijo-Kleczkowska A., Leszczyński J.: Analysis of cyclic combustion of solid fuels. Fuel 88 (2009), 221-234. Atesok G., Boylu F., Sikeci A. A., Dincer H.: The effect of coal properties on the viscosity of coal-water slurries. Fuel 81 (2002), 1855-1858. Boylu F., Dincer H., Atesok G.: Effect of coal particle size distribution, volume fraction and rank on the rheology of coal-water. Fuel Processing Technology (2004), 241

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Monika Kosowska-Golachowska, Agnieszka Kijo-Kleczkowska, Adam Luckos, Krzysztof Wolski and Tomasz Musiał

References [1] N atunen M., J äntti T., G oral D., N uortimo K.: First Operating Experiences of 55 MWe Konin and 205 MW e Połaniec CF Boilers Firing 100% Biomass. PowerGen Europe 2013. [2] K osowska -G olachowska M., L uckos A., K los K., M usial T.: Oxy-combustion of different coals in a circulating fluidized bed. In: Proc. 10th Int. Conf. Circulating Fluidized Beds and Fluidization Technology – CFB-10 (T.M. Knowlton, Ed.), 481–488, Sun River, May 1–5, 2011. [3] C hen Y., M ori S., P an W.: Studying the mechanisms of ignition

Open access

Adrian Balicki and Łukasz Bartela

References `[1] Toftegaard M.B., Brix J., Jensen P.A.: Oxy-fuel combustion of solid fuels. Prog. Energ. Combust. Sci. 36(2010), 581-625. [2] Wall T., Liu Y., Spero C.: An overview on oxyfuel coal combustion - State of the art research and technology development. Chem. Eng. Res. Design 87(2009), 1003-1016. [3] Suraniti S.L., Nsakala ya Nsakala, Darling S.L.: Alstom Oxyfuel CFB boilers: a promising option for CO2 capture. Energy Procedia 1(2009), 543-548. [4] Muskała W., KrzywańskiJ., Czakiert T

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Łukasz Dunajski, Wojciech Kruk and Wojciech Nowak

Abstract

According to a fuel flexibility, fluidized bed boilers are considered as appropriate for biomass combustion as cofiring. But the burning of fuels such as forest and agricultural biomass raises a number of operational problems. Most important of these problems are bed agglomeration and deposition. Deposition appears when biomass contains significant amounts of alkali elements, such as sodium and potassium. The purpose of the work is to select a fuel additive to overcome these operational problems. Investigations were conducted in two stages at a pilot scale 0.1 MWth laboratory circulating fluidized bed reactor. As the fuel, the mixture of biomass contained forest residues, sunflower husks, straw and wood pellets from mixed woods was selected. In the first stage biomass was burnt without any additives, while in the second one the fuel was enriched with some additive. The additive (liquid mixture of chemicals) was added to the fuel in amounts of 1 dm3 per 5-10 Mg of fuel. The following operational parameters were examined: temperature profiles along the height of the circulating fluidised bed column, pressure profiles, emissions. After the tests, the laboratory reactor was inspected inside. Its results enables expression of the following conclusions: there was no agglomeration during fuel additive testing, and the deposition was reduced as well. Moreover, the parts (heating surfaces, separator) of the laboratory reactor were coated with a protective layer. The layer covered microcracks and protected the parts from deposition for a long period after the operation.

Open access

Janusz Kotowicz and Marcin Job

.S.: Characteristics of oxy-fuel combustion in gas turbines. Applied Energy, 89(2012), 38-394. [5] Zhanga N., Lior N.: Two novel oxy-fuel power cycles integrated with natural gas reforming and CO2 capture. Energy 33(2008), 340-351. [6] Kotowicz J., Job M.: Optimization of the steam part parameters in the CCGT unit with oxy-combustion and the carbon capture installation. Rynek Energii 107(2013), 4, 48-55 (in Polish). [7] Kotowicz J.: Combined Cycle Power Plants. Wydawnictwo KAPRINT, Lublin 2008 (in Polish). [8] Kotowicz

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Andrzej Ziębik and Paweł Gładysz

References [1] Ziębik A., Gładysz P.: System approach to the energy analysis of an integrated oxy-fuel combustion power plant . Rynek Energii 101(2012), 4, 137-146. [2] Ziębik A., Gładysz P.: Systems analysis of exergy losses in an integrated oxy-fuel combustion power plant . In: Proc. ECOS Int. Conf., Perugia, 26-29 June, 2012. [3] Szargut J., Ziębik A.: Fundamentals of Thermal Engineering . PWN, Warsaw 2000 (in Polish). [4] Szargut J.: Exergy. Handbook of Calculation and Application

Open access

Andrzej Ziębik and Paweł Gładysz

References [1] Bibrowski Z.: Cumulative Energy Consumption. PWN, Warsaw 1983 (in Polish). [2] Boustead I., Hancock G.F.: Handbook of Industrial Energy Analysis. Ellis Horwood Limited Publ., Chichester 1979. [3] Czarnowska L., Stanek W., Pikoń K., Nadziakiewicz J.: Environmental quality evaluation of hard coal using LCA and Exergo-Ecological Cost methodology. Chem. Eng. Tran. (2014) (in press). [4] Gładysz P., Ziębik A.: Life cycle assessment of an integrated oxy-fuel combustion power plant with

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Jan Taler, Dawid Taler, Tomasz Sobota and Piotr Dzierwa

.: The measurement of radiant heat flux in large boiler furnaces-I. Problems of ash deposition relating to heat flux. Int J Heat Mass Transfer 23 (1980), 1015-1022. Arai N., Matsunami A., Churchill S. W.: A review of measurements of heat flux density applicable to the field of combustion. Exp Therm Fluid Sci. 12 (1996), 452-460. Taler J.: Measurement of heat flux to steam boiler membrane water walls. VGB Kraftwerkstechnik 70 (1990), 540-546. Taler J.: A method of determining local

Open access

Paweł Ziółkowski, Witold Zakrzewski, Oktawia Kaczmarczyk and Janusz Badur

References [1] Anderson R., MacAdam S., Viteri F., Davies D., Downs J., Paliszewski A.: Adapting gas turbines to zero emission oxy-fuel power plants . ASME Paper GT2008-51377 (2008) 1-11. [2] Badur J.: Development of Energy Concept . Wyd. IMP PAN, Gdańsk 2009 (in Polish). [3] Badur J.: Five lecture of contemporary fluid termomechanics . Gdańsk 2005 (in Polish). www.imp.gda.pl/fileadmin/doc/o2/z3/.../2005 − piecwykladow.pdf. [4] Badur J.: Numerical modeling of sustanable combustion at

Open access

Tomasz Bury

Thermodynamic consequences of hydrogen combustion within a containment of pressurized water reactor

Gaseous hydrogen may be generated in a nuclear reactor system as an effect of the core overheating. This creates a risk of its uncontrolled combustion which may have a destructive consequences, as it could be observed during the Fukushima nuclear power plant accident. Favorable conditions for hydrogen production occur during heavy loss-of-coolant accidents. The author used an own computer code, called HEPCAL, of the lumped parameter type to realize a set of simulations of a large scale loss-of-coolant accidents scenarios within containment of second generation pressurized water reactor. Some simulations resulted in high pressure peaks, seemed to be irrational. A more detailed analysis and comparison with Three Mile Island and Fukushima accidents consequences allowed for withdrawing interesting conclusions.