| 'csv' data |
|
"Screen" data (in 'csv' format) • |
Computes, for a given cooling tower:
(a) kG,
the 'global mass-transfer coefficient',
kG ≅ L cL ⁄
(ρ Z a) × (Integral of Merkel equation);
and (b) the ratio ΔP⁄Z
([Ludwig, 1997]).
The coefficient and the ratio, for a given cooling tower,
are both usually adopted as empirical relations of the form
k L'α
G'β . So,
k, α and β are calculated here
for either case.
The "screen" data are given from 'csv' data inserted
in the textarea.
The default data (above) lead, respectively, to
(k, α, β) = (0.99, 0.33, 0.84),
(70., 0.34, 1.135).
Draws two plots: an upper plot with the values of
L' and G' sorted by ascending L' (first) and
G' (second); and a lower plot of the corresponding
experimental and calculated values of
(according to "which adjustment")
either the coefficient kGa
or ΔP⁄Z
from experimental data. |
• Ludwig, Ernest E., 1997,
"Applied process design for chemical and petrochemical plants",
vol. 2 (Ch. 8, Distillation; Ch. 9, Packed towers), 3.rd ed.,
Butterworth-Heinemann, Woburn, MA (USA), xx+485 pp. ISBN 0-88415-025-9 (p. 387 ff).
• Merkel, F., 1925,
"Verdunstungskühlung", VDI-Zeitschrift, 70, 123–8
(VDI Forschungsarbeiten, nr. 275, Berlin),
in [Picardo & Variyar, 2012].
('Verdunstung', evaporation; 'Kühlung', cooling)
• Picardo, J. R.,
J. E. Variyar, 2012, "The Merkel equation revisited: a novel method to
compute the packed height of a cooling tower", Energy Conversion and
Management, 57, 167–172 (doi 10.1016/j.enconman.2011.12.016).
• Informatics
co-authorship by Afonso Paredes
(MSc student, IST, 2021).
• 1862-01-23: Hilbert, David
(† 1943-02-14, 81 yrs.). |
