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Geometry dependence of heating in a U-tube heat exchanger for pasteurization CIGR Journal
de la Torre, Jerry James Murillo; Culaba, Alvin B; Martinez, Romualdo C.
A serpentine tube heat exchanger is physically constrained by its bend radius. The U-tube bend section of a tubular heat exchanger is thus interesting broadly in terms of fluid flow and heat transfer. This paper presents the tube size dependence of heating profile of this U-tube as is commonly encountered in the design of pasteurizers. Analytical and computational modeling were employed in investigating the heat capacity, heat flux, heating rate and energy use of a U-tube at increasing diameters 9.52, 12.70, 19.05 and 25.40 mm, each at constant 1 mm thickness. SolidWorks 2016 was used in geometric modeling while Ansys v16 was used for transient thermal computational fluid dynamics simulation of the conduit (SS316L) and the product (coconut water). The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tubular heat exchanger; Heat transfer; Modeling and simulation; Pasteurizer; Coconut water.
Ano: 2021 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6635
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Effect of water losses by evaporation and chemical reaction in an industrial slaker reactor BABT
Andreola,Ricardo; Vieira,Osvaldo; Santos,Onélia Aparecida Andreo dos; Jorge,Luiz Mario de Matos.
A dynamic model of the slaker reactor was developed and validated for Klabin Paraná Papéis causticizing system, responsable for white liquor generation used by the plant. The model considered water losses by evaporation and chemical reaction. The model showed a good agreement with the industrial plant measures of active alkali, total titratable alkali and temperature, without the need of adjustment of any parameter. The simulated results showed that the water consumption by the slaking reaction and evaporation exerted significant influence on the volumetric flow rate of limed liquor, which imposed a decrease of 4.6% in the amount of water in reactor outlet.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Slaker reactor; Modeling and simulation; White liquor.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200019
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