Publication detail

Numerical Analysis of Heat Transfer in Radiant Section of Fired Heater with Realistic Imperfect Geometry of Tube Coil

JEGLA, Z. HÁJEK, J. VONDÁL, J.

Original Title

Numerical Analysis of Heat Transfer in Radiant Section of Fired Heater with Realistic Imperfect Geometry of Tube Coil

Type

conference paper

Language

English

Original Abstract

Complex numerical computations are performed for vertical cylindrical fired heater operated in crude oil atmospheric distillation unit to analyse the distribution of heat flux on the tubes of radiant section. The numerical model describes flow, gas combustion and radiative heat transfer inside the radiation section of the fired heater. Analysis of variations of heat flux on circumferential and longitudinal distribution on individual tube walls is executed comparing case of ideal (originally designed) tube coil geometry and tube coil containing typical real geometry imperfections (developed during years of operation). Results of heat transfer analysis confirm and quantify the significant effects of non-uniform heat flux distribution on individual radiant tubes negatively sharpened by geometry imperfections of tube coil. It is recognized, that fired heater design standards recommendations invoked in 1D design calculations of fired heaters are significantly underestimating real heat flux variability.

Keywords

fired heater, numerical analysis, heat transfer, radiant section

Authors

JEGLA, Z.; HÁJEK, J.; VONDÁL, J.

RIV year

2014

Released

23. 8. 2014

Publisher

Aidic Servizi S.r.l.

Location

Milan, Italy

ISBN

978-88-95608-30-3

Book

Proceedings of the 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction PRES 2014

ISBN

2283-9216

Periodical

Chemical Engineering Transactions

Year of study

39

State

Republic of Italy

Pages from

889

Pages to

894

Pages count

6

BibTex

@inproceedings{BUT109158,
  author="Zdeněk {Jegla} and Jiří {Hájek} and Jiří {Vondál}",
  title="Numerical Analysis of Heat Transfer in Radiant Section of Fired Heater with Realistic Imperfect Geometry of Tube Coil",
  booktitle="Proceedings of the 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction PRES 2014",
  year="2014",
  journal="Chemical Engineering Transactions",
  volume="39",
  pages="889--894",
  publisher="Aidic Servizi S.r.l.",
  address="Milan, Italy",
  doi="10.3303/CET1439149",
  isbn="978-88-95608-30-3",
  issn="2283-9216"
}