Transient response of a plate-fin-and-tube heat exchanger considering different heat transfer coefficients in individual tube rows
Authors:
- Dawid Taler,
- Jan Taler,
- Katarzyna Wrona
Abstract
Experimental studies of multi-row plate-fin heat exchangers show that the highest average heat transfer coefficient on the air side occurs in the first row of tubes. In the next rows of tubes up to about the sixth row the heat transfer coefficient decreases. It is necessary to find the relationships for the air-side Nusselt number on each tube row to design a plate-fin and tube heat exchanger (PFTHE) with the optimum number of tube rows.The air-side Nusselt number correlations can be determined experimentally or by CFD modeling (Computational Fluid Dynamics). The paper presents a new method of modeling the transient operation of PFTHE, considering that the Nusselt numbers on the air side of individual tube rows are calculated from different empirical relationships. CFD modeling of the PFTHE was used to establish the heat transfer coefficients on individual tube rows. A transient model of a double-row, two-pass PFTHE was developed, considering different heat transfer coefficients in the first and second row of tubes. The influence of the adoption of different coefficients on the heat flow rate exchanged between water and air in the first and second row of tubes in two passes of the heat exchanger was shown.
- Record ID
- CUT5c35177b248a410ca0a737b740299797
- Publication categories
- ;
- Author
- Journal series
- Energy, ISSN 0360-5442, e-ISSN 1873-6785
- Issue year
- 2020
- Vol
- 195
- Pages
- [1-13]
- Article number
- 117023
- Other elements of collation
- schem.; tab.; wykr.; Bibliografia (na s.) - 12-13; Bibliografia (liczba pozycji) - 42; Oznaczenie streszczenia - Abst.; Numeracja w czasopiśmie - Vol. 195
- Keywords in English
- air-cooled heat exchanger, different heat transfer coefficients in the first and second tube row, mathematical model, unsteady-state, experimental tests
- DOI
- DOI:10.1016/j.energy.2020.117023 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/abs/pii/S0360544220301304?via%3Dihub#! Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 200
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT5c35177b248a410ca0a737b740299797/
- URN
urn:pkr-prod:CUT5c35177b248a410ca0a737b740299797
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.