LAPSE:2020.0295
Published Article
LAPSE:2020.0295
CFD Simulation of Forced Recirculating Fired Heated Reboilers
March 12, 2020
An advanced algorithm has been developed in order to analyze the performance of re-boiling process of crude oil flowing inside reboilers tubes. The proposed model is composed from Heptane fire heater and a tube array. The heat flux produced from burner is transferred to the crude oil flowing inside the tube. The computational model is composed of two phases—Simulation of fire by using Fire Dynamics Simulator software (FDS) version 5.0 and then a nucleate boiling computation of the crude oil. FDS code is formulated based on CFD (Computational Fluid Dynamics) of fire heater. The thermo-physical properties (such as: thermal conductivity, heat capacity, surface tension, viscosity) of the crude oil were estimated by using empirical correlations. The thermal heat transfer to evaporating two-phase crude oil mixture occur by bubble generation at the wall (nucleate boiling) has been calculated by using Chen correlation. It has been assumed that the overall convective heat transfer coefficient is composed from the nucleate boiling convective coefficient and the forced turbulent convective coefficient. The former is calculated by Forster Zuber empirical equation. The latter is computed from the Dittus-Boelter relationship. In order to validate the nucleate boiling heat transfer coefficient, a comparison has been performed to nucleate boiling convective coefficient obtained by Mostinski equation. The relative error between the nucleate boiling convective heat-transfer coefficients is 10.5%. The FDS numerical solution has been carried out by using Large Eddy Simulation (LES) method. This work has been further extended to include also the structural integrity aspects of the reboiler metal pipe by using COMSOL Multiphysics software. It was found out, that the calculated stress is less than the ultimate tensile strength of the AISI 310 Steel alloy.
Keywords
Computational Fluid Dynamics, convective heat transfer, crude oil, fire heater, nucleate boiling, process simulation, radiative heat transfer, reboiler, thermo-physical properties, two phase flow
Suggested Citation
Davidy A. CFD Simulation of Forced Recirculating Fired Heated Reboilers. (2020). LAPSE:2020.0295
Author Affiliations
Davidy A: Tomer Ltd., Tel-Aviv 6473424, Israel [ORCID]
Journal Name
Processes
Volume
8
Issue
2
Article Number
E145
Year
2020
Publication Date
2020-01-22
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr8020145, Publication Type: Journal Article
Record Map
Published Article

LAPSE:2020.0295
This Record
External Link

doi:10.3390/pr8020145
Publisher Version
Download
Files
[Download 1v1.pdf] (5.3 MB)
Mar 12, 2020
Main Article
License
CC BY 4.0
Meta
Record Statistics
Record Views
557
Version History
[v1] (Original Submission)
Mar 12, 2020
 
Verified by curator on
Mar 12, 2020
This Version Number
v1
Citations
Most Recent
This Version
URL Here
https://psecommunity.org/LAPSE:2020.0295
 
Original Submitter
Calvin Tsay
Links to Related Works
Directly Related to This Work
Publisher Version