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  • 1
    Electronic Resource
    Electronic Resource
    Structural analysis and solution of systems of algebraic design equations (1984)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 30 (1984), S. 609-622 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A new method for expressing the structure of a system of equations is developed using a type of occurrence matrix entitled the functionality matrix. The functionality matrix indicates not only the occurrence of variables in equations but also the functional form in which they occur. Since the difficulty of solving an equation for a variable is related to its functional form, analysis of the functionality matrix provides explicit information on the difficulty of solution of the solution of the equation.A methodology for the solution of design problems by digital computers is described. This methodology operates on the functionality matrix which describes the set of design equations. Algorithms using this methodology interact and guide the designer in an efficient selection of design variables and redundant equations. Once design variables and redundant equations are selected, a computational method is presented for ordering and solving the equations.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690300412
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison of linear distributed-parameter filters to lumped approximants (1986)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 32 (1986), S. 186-194 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Optimal distributed-parameter filters are commonly implemented using approximating lumped Kalman filtering theory. The effect of such an approximation is investigated. A theoretical development shows that there is a loss in the spatial noise correlation for the lumped approximants. Two numerical examples of engineering significance illustrate that one result of this loss is slower filter convergence for the lumped approximants relative to the full distributed-parameter filters.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690320203
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Use of a distributed computer system for tubular reactor profile and catalyst activity identification (1985)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 31 (1985), S. 339-343 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690310227
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Characterization of parallel-plate Kiil dialysers (1972)
    Springer
    Medical & biological engineering & computing 10 (1972), S. 267-275 
    Details
    ISSN: 1741-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire On discute le fonctionnement local (distribué) d'un dialyseur Kiil, avec le but de montrer l'interdépendance entre les deux courants de liquide et ainsi l'importance du modelage du système comme un système interpénétré à courants multiples. On présente une caractérisation du rendement du dialyseur en termes d'inertie globale et un facteur d'efficacité. L'approche du facteur d'efficacité donne des informations sur les mécanismes internes et par conséquent est un meilleur moyen, et de la caractérisation du dialyseur de Kiil et de sa comparaison avec le rendement de divers appareils.
    Abstract: Zusammenfassung Es wird das örtliche, (verteilte), Verhalten von einem Kiil Dialysator zu dem Zweck besprochen, die Wechselbeziehung zwischen den zwei Flüssigkeitsströmen zu zeigen und somit die Wichtigkeit, das System als ein, in gegenseitiger Beziehung stehendes Mehrstromsystem zu formen. Eine Charakterisierung der Dialysatorleistung wird sowohl in Form eines mittleren log-Gesamtwiderstandes und eines Wirksamkeitfaktors dargestellt. Die Annäherung durch den Wirksamkeitsfaktor ergibt Information über den inneren Mechanismus und ist daher ein besseres Mittel, sowohl Kiil zu charakterisieren und die Leistung verschiedener Dialysatoren zu vergleichen.
    Notes: Abstract The local (distributed) behavior of a Kiil dialyser is discussed with the aim of showing the interrelation between the two fluid streams and thus the importance of modeling the system as an interrelated multistream system. A characterization of the dialyser's performance is presented in terms of both an overall log-mean resistance and an effectiveness factor. The effectiveness factor approach gives information on the internal mechanisms and therefore is a better means of both characterizing of Kiil and comparing the performance of different dialysers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02474117
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Mass transfer studies of a Kiil haemodial yser (1971)
    Springer
    Medical & biological engineering & computing 9 (1971), S. 165-173 
    Details
    ISSN: 1741-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire Cet article détermine—au moyen de comparaisons avec les données expérimentales—la valeur d'un modèle mathématique d'un dialyseur à contre-courant et à plaque plate. Ce modèle suppose une résistance du transfert de masse distribuée sur le plan sanguin, une perméabilité simple de la membrane et une résistance localisée sur le côté dialysé du dialyseur. Le modéle donne des rèsultats conformes avec une marge de 6 pour cent par rapport aux données expérimentales. Les données de transfert de masse et d'ultrafiltrage sont communiquées pour le dialyseur.
    Abstract: Zusammenfassung Dieser Bericht bestimmt den Wert eines mathematischen Modells eines Gegenstrom Dialysators mit einer ebenen Platte durch Vergleich mit experimentellen Daten. Das Modell nimmt einen verteilten Massenübergangswiderstand auf der Blutseite an, eine einfache Permeabilität für die Membran und einen punktförmig verteilten Widerstand auf der Dialysatseite des Dialysators. Das Modell stimmt im Vergleich mit den experimentellen Daten innerhalb von 6 Prozent überein. Massenübergang und Ultrafiltrierungsdaten werden für den Vertilgungsdialysator gegeben.
    Notes: Abstract This paper determines the worth, through comparison with experimental data, of a mathematical model of a flat-plate, countercurrent-flow dialyser. The model assumes a distributed mass transfer resistance on the blood side, a simple permeability for the membrane, and a lumped resistance on the dialysate side of the dialyser. The model agrees within 6 per cent when compared to experimental data. Mass transfer and ultrafiltration data are reported for the Kiil dialyser.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02474812
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    Paper (German National Licenses)
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