Otero de la Gandara, J.L.
Universidad de Alcala de Henares, Madrid (Spain). Facultad de Ciencias Quimicas1993
Universidad de Alcala de Henares, Madrid (Spain). Facultad de Ciencias Quimicas1993
AbstractAbstract
[en] In this report a graphical method to analyze the direct suspension-cyclon heat exchangers, in multi-stage configuration is presented. Each tube-cyclon stage is regarded as an equilibrium unit. The modification of the graphical method is considered in the case of solid entrained by the current of gas leaving the cyclon, and of gas by-passed in solid feed. The graphical method of analysis is useful to evaluate the operating conditions of the heat exchanger. (Author) 6 ref
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Analisis grafico de operacion de cambiadores de calor por contacto directo
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Elbel, H.; Kummerer, K.; Bojarsky, K.; Lopez Jimenez, J.; Otero de la Gandara, J.L.
Kernforschungszentrum Karlsruhe G.m.b.H. (Germany, F.R.). Inst. fuer Material- und Festkoerperforschung; Junta de Energia Nuclear, Madrid (Spain)1979
Kernforschungszentrum Karlsruhe G.m.b.H. (Germany, F.R.). Inst. fuer Material- und Festkoerperforschung; Junta de Energia Nuclear, Madrid (Spain)1979
AbstractAbstract
[en] Report on the Seminar celebrated in Madrid between KfK (Karlsruhe) and JEN (Madrid) concerning a Joint Irradiation Program of Fast Reactor Fuel Rods. The design of fuel rods in general is defined, and, in particular of those with a density 94% DT and diameter 7.6 mm up to a burn-up of 7% FIMA, to be irradiated in the FR2 Reactor (Karlsruhe). Together with the design of NaK and single-wall capsules used in this irradiation, other possibilities of irradiation in the reactor will also be described. (auth.)
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1979; 77 p; 11 figs.
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Report
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EPITHERMAL REACTORS, FUEL ELEMENTS, HEAVY WATER COOLED REACTORS, HEAVY WATER MODERATED REACTORS, IRRADIATION REACTORS, ISOTOPE PRODUCTION REACTORS, NATURAL URANIUM REACTORS, REACTOR COMPONENTS, REACTORS, RESEARCH AND TEST REACTORS, RESEARCH REACTORS, TANK TYPE REACTORS, TEST REACTORS, THERMAL REACTORS
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AbstractAbstract
[en] The experimental work carried out in pilot plant scale for uranium extraction from clarified ore leach liquors, has allowed to obtain fluidized bed break through curves relationship, including the main variables involved in the equilibrium and kinetic of the process. Two calculations methods have been developed in order to predict the behaviour or the ion exchange column, working in periodic from and with countercurrent flows. These methods, called the efficiencies method and the constant feeds method, have been tried by batch-wise and continuous tests, reaching results very close to experimental values. (author)
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Cambio de ion continuo: curvas de ruptura de carga y metodos de calculo
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[en] The heat transfer between one liquid phase dispersed in drops in other insoluble liquid phase is studied. In order to analyze the direct contact heat transfer for different systems has been used. The relative importance of properties affecting the fluid-dynamics and the energy exchange between phases has been checked. (author)
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Transporte de calor por contacto directo liquido-liquido. I. Analisis de los datos de la etapa de contacto
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Anales de Quimica. Serie A, Quimica Fisica y Quimica Tecnica; ISSN 0211-1330;
; v. 81(2); p. 287-293

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[en] The contribution of the elemental stages of formation, movement and coalescence of drops, in direct contact heat exchange are studied. The heat transfer efficiencies are evaluated through correlations corresponding to several models, together with a new experimental technique and model of data analysis. This technique being a alternative design allows the obtention of high heat transfer efficiencies (more than 95%). (author)
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Transporte de calor por contacto directo liquido-liquido. II. Formacion movimiento y coalescencia de las gotas en forma repetida y sucesiva
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Anales de Quimica. Serie A, Quimica Fisica y Quimica Tecnica; ISSN 0211-1330;
; v. 81(2); p. 294-300

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[en] A continuous ion exchange pilot plant, with a column operated like a series of fluidized beds of resin, is reviewed. Experimental work was carried out on a uranium extraction from ore leach liquors. Equilibrium and kinetics studies have allowed to obtain the fluidized bed breakthrough curves relationship. Two methods have been developed in order to predict the column efficiency, when it is working in periodic form and with countercurrent flows. These methods have been tried by batch-wise and continuous tests, reaching results very close to experimental values. (author)
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Sistema continuo de cambio de ion en columna de lecho fluidizado
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[en] The rate of mass transfer between water and naftenic acid and threebutilphosphate in kerosen are studied in the two possibilities to or from water. The two insoluble phases are brought in to intimate contact with dispersed phase droplets, in a single-stage process. The evolution of the equilibrium distribution of solute is taken in consideration. (author)
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Transporte de materia en extraccion y reextraccion. Operacion por cargas y superficie de transferencia definida
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Anales de Quimica. Serie A, Quimica Fisica y Quimica Tecnica; ISSN 0211-1330;
; CODEN AQSTD; v. 83(3,suppl.1); p. 538-549

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[en] The annular liquid-gas flow in vertical ducts is studied in order to know the possibilities of these devices as direct heat exchangers. The liquid-gas flow rate in liquid lifting and the friction losses are correlated with the Froude number of the mixture. (author) 17 refs
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Cambiadores de calor por contacto directo liquido gas. Parte 1: Aspectos fluidodinamicos
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[en] The mass-transfer between phases is studied in case of dispersed-phase droplets. These droplets are or are not re-formed two or three times. The experimental determination of the rate of mass transfer is studied in order to know rate control. (author)
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La etapa de extraccion liquido-liquido por dispersion unica o repetida de gotas
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Anales de Quimica. Serie A, Quimica Fisica y Quimica Tecnica; ISSN 0211-1330;
; CODEN AQSTD; v. 83(3,suppl.1); p. 550-557

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