Abstrakt
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.
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