Szczegóły publikacji
Opis bibliograficzny
Determination of heat transfer correlations for plate-fin-and-tube heat exchangers / Dawid TALER // Heat and Mass Transfer ; ISSN 0947-7411. — 2004 — vol. 40 iss. 10, s. 809–822. — Bibliogr. s. 821–822, Abstr. — Publikacja dostępna online od: 2003-12-08
Autor
Dane bibliometryczne
ID BaDAP | 44133 |
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Data dodania do BaDAP | 2009-03-05 |
Tekst źródłowy | URL |
DOI | 10.1007/s00231-003-0466-4 |
Rok publikacji | 2004 |
Typ publikacji | artykuł w czasopiśmie |
Otwarty dostęp | |
Czasopismo/seria | Heat and Mass Transfer |
Abstract
This paper presents a numerical method for determining heat transfer coefficients in cross-flow heat exchangers with extended heat exchange surfaces. Coefficients in the correlations defining heat transfer on the liquid- and air-side were determined using a non-linear regression method. Correlation coefficients were determined from the condition that the sum of squared fluid temperature differences at the heat exchanger outlet, obtained by measurements and those calculated, achieved minimum. Minimum of the sum of the squares was found using the Levenberg-Marquardt method. The outlet temperature of the fluid leaving the heat exchanger was calculated using the mathematical model describing the heat transfer in the heat exchanger. Since the conditions at the liquid-side and those at the air-side are identified simultaneously, the derived correlations are valid in a wide range of flow rate changes of the air and liquid. This is especially important for partial loads of the exchanger, when the heat transfer rate is lower than the nominal load. The correlation for the average heat transfer coefficient on the air-side based on the experimental data was compared with the correlation obtained from numerical simulation of 3D fluid and heat flow, performed by means of the commercially available CFD code. The numerical predictions are in good agreement with the experimental data.