Thermal calculations of plate-fin-and-tube heat exchangers with different heat transfer coefficients on each tube row
Authors:
- Dawid Taler,
- Jan Taler,
- Marcin Trojan
Abstract
In finned tube heat exchangers, the first rows of tubes are most effective when air velocity in front of the exchanger is less than about 3.5 m/s. The heat transfer coefficient (HTC) decreases with each subsequent row and stabilizes only from the fifth row onwards. The paper examines a two-pass double row plate-fin and tube heat exchanger (PFTHE) made of circular or oval pipes. A method for determining the air side Nusselt number on individual pipe row was developed, using the results of CFD (Computational Fluid Dynamics) modelling of the heat exchanger. Also, a heat transfer correlation was found for the mean HTC for the whole PFTHE using CFD modelling. The correlations based on the results of CFD modelling match very well the empirical correlations based on experimental tests of two car radiators. The analysis shows that the first rows of pipes, it is possible to reduce investment expenditures at the same thermal output significantly. Heating systems with PFTHE air heaters with fewer rows of pipes are characterized by lower fuel consumption due to their higher efficiency. The investment costs for automotive radiators can also be reduced. The introduction of PFTHE heat exchangers with fewer pipe rows has a positive impact on the environment. Both material expenditures on the construction of PFTHE, energy consumption by the air fan, and fuel consumption for heating purposes are reduced.
- Record ID
- CUT8999177d75254f41a7a83690cf97cc57
- Publication categories
- ;
- Author
- Journal series
- Energy, ISSN 0360-5442, e-ISSN 1873-6785
- Issue year
- 2020
- Vol
- 203
- Pages
- [1-14]
- Article number
- 117806
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 13-14; Bibliografia (liczba pozycji) - 27; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 203
- Keywords in English
- tubular heat exchanger with plate-fins, CFD modelling, air-side Nusselt number, different heat transfer correlation on specific pipe row, empirical heat transfer correlation
- DOI
- DOI:10.1016/j.energy.2020.117806 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/abs/pii/S0360544220309130 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/CUT8999177d75254f41a7a83690cf97cc57/
- URN
urn:pkr-prod:CUT8999177d75254f41a7a83690cf97cc57
* 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.