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Evaluation method of single blow experiment for the determination of heat transfer coefficient and dispersive Peclet number *

Evaluation method of single blow experiment for the determination of heat transfer coefficient... Abstract An evaluation method is developed for single blow experiments with liquids on heat exchangers. The method is based on the unity Mach number dispersion model. The evaluation of one experiment yields merely one equation for the two unknowns, the number of transfer units and the dispersive Peclet number. Calculations on an example confirm that one single blow test alone cannot provide reliable values of the unknowns. A second test with a liquid of differing heat capacity is required, or a tracer experiment for the measurement of the Peclet number. A modified method is developed for gases. One experiment yields the effective number of transfer units and approximate values of the two unknowns. The numerical evaluation of calculated experiments demonstrates the applicability of the evaluation methods. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Thermodynamics de Gruyter

Evaluation method of single blow experiment for the determination of heat transfer coefficient and dispersive Peclet number *

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Publisher
de Gruyter
Copyright
Copyright © 2015 by the
ISSN
2083-6023
eISSN
2083-6023
DOI
10.1515/aoter-2015-0029
Publisher site
See Article on Publisher Site

Abstract

Abstract An evaluation method is developed for single blow experiments with liquids on heat exchangers. The method is based on the unity Mach number dispersion model. The evaluation of one experiment yields merely one equation for the two unknowns, the number of transfer units and the dispersive Peclet number. Calculations on an example confirm that one single blow test alone cannot provide reliable values of the unknowns. A second test with a liquid of differing heat capacity is required, or a tracer experiment for the measurement of the Peclet number. A modified method is developed for gases. One experiment yields the effective number of transfer units and approximate values of the two unknowns. The numerical evaluation of calculated experiments demonstrates the applicability of the evaluation methods.

Journal

Archives of Thermodynamicsde Gruyter

Published: Dec 1, 2015

References