The influence of a radiated heat exchanger surface on heat transfer

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Abstract

The experiment leads to establish the influence of radiated surface development heat exchangers on the values of heat flux transferred with water flowing through the exchangers and placed in electric furnace chamber. The values of emissivity coefficients are given for the investigated metal and ceramic coatings. Analytical calculations have been made for the effect of the heating medium (flame) – uncoated wall and then heating medium (flame) – coated wall reciprocal emissivity coefficients. Analysis of the values of exchanged heat flux were also realized. Based on the measurement results for the base coating properties, these most suitable for spraying the walls of furnaces and heat exchangers were selected, and determined by the intensification of heat exchange effect. These coatings were used to spray the walls of a laboratory waste-heat boiler, and then measurements of fluxes of heat absorbed by the cooling water flowing through the boiler tubes covered with different type coatings were made. Laboratory tests and calculations were also confirmed by the results of full-scale operation on the metallurgical equipment.

[1] Morel S.: Thermal Spraying Coatings. Wyd. Politechniki Częstochowskiej, Częstochowa 1997.

[2] Hernas A., Dobrzański J.: The Permanence and the Decay of Elements of Pots and Steam Turbines. Wyd. Politechniki Śląskiej, Gliwice 2003, 24–45.

[3] Sala A.: Radiation Heat Transfer. WNT, Warsaw 1982, 18–43.

[4] Burakowski T., Wierzchoń T.: Engineering of the surface of metals. WNT, Warsaw 1995.

[5] Abrgmowicz B.G., Goldsztein W.Ł.: Intensification of the Exchange of the Warm Weather with Coatings. Eniergia, Moscow 1977, 26–39.

[6] Morel S.: Using plasma spraying coatings in the economy of the thermal mill. Przegląd Spawalnictwa 81(2009), 9, 90–93.

[7] Węgrzyn T., Piwnik J.: Low alloy welding with mocro-jet cooling. Arch. Metllurgy and Materials 57(2012), 2.

[8] Morel S.: Application of plasma-sprayed coatings in heat absorption by radiated walls. Arch. Energ. 41(2011), 3–4, 111–126.

[9] Morel S.: Using plasma covers in smelting heating devices. Hutnik-Wiadomości Hutnicze 78(2011), 5, 449–451.

[10] Hejwowski T.: Modern put thermal coatings wear-resistant abrasive and erosional. Wyd. Politechnika Lubelska, Lublin 2013.

[11] Hermas A., Chmiela B.: Untypical bromine corrosion in bolers co-firing biomass. J. AMME 54(2012), 1, 58–66.

[12] Bielikowski W.: Corrosion of the area exchanger of pots at slaniu low-emission. Energetyka 1(2000), 45–51.

[13] Zubielewicz M.: Directions of the research and development of protective coatings. Ochrona przed korozją 4(2006), 97–98.

Archives of Thermodynamics

The Journal of Committee on Thermodynamics and Combustion of Polish Academy of Sciences

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CiteScore 2016: 0.54

SCImago Journal Rank (SJR) 2016: 0.319
Source Normalized Impact per Paper (SNIP) 2016: 0.598

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