Farahani, Hamed Farmahini

Jomaas, Grunde

Rangwala, Ali S.

van Gelderen, Laurens

In order to improve the validity of small scale crude oil burning experiments, which seem to underestimate the burning efficiency obtained in larger scales, the gasification mechanism of crude oil was studied. Gasification models obtained from literature were used to make a set of predictions for relevant burning related parameters which were then compared to experimental results. These parameters, the surface temperature, mass loss rate, flame height and residue composition, were studied for three hydrocarbon liquids (n-octane, dodecane and hexadecane) and two crude oils (DUC and REBCO). Based on the models-experiments comparison, it was suggested that crude oil burns according to a distillation-like mechanism, with the light components burning off first, followed by increasingly heavier components as the burning progresses. Thus, in order for the crude oil to burn near 100%, the surface temperature must continuously increase to evaporate the heaviest components. Small scale experiments were deemed to lack a sufficient flame volume and resulting heat feedback to the fuel surface to reach such temperatures, thus explaining the lower burning efficiencies. Small scale experiments featuring an external heat source to simulate the larger fire size are currently in process

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Dec 21, 2017Scaling of the burning efficiency for multicomponent fuel pool firesvan Gelderen, Laurens; Farahani, Hamed Farmahini ; Rangwala, Ali S.; Jomaas, GrundePublication date:2015Document VersionPeer reviewed versionLink back to DTU OrbitCitation (APA):van Gelderen, L., Farahani, H. F., Rangwala, A. S., & Jomaas, G. (2015). Scaling of the burning efficiency formulticomponent fuel pool fires. Abstract from Fire Safety Day 2015, Lyngby, Denmark.Scaling of the burning efficiency for multicomponent fuel pool fires Laurens van Gelderen†, Hamed Farmahini Farahani‡, Grunde Jomaas†, Ali S. Rangwala‡ †Department of Civil Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark  ‡Department of Fire Protection Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA  Abstract In order to improve the validity of small scale crude oil burning experiments, which seem to underestimate the burning efficiency obtained in larger scales, the gasification mechanism of crude oil was studied. Gasification models obtained from literature were used to make a set of predictions for relevant burning related parameters which were then compared to experimental results. These parameters, the surface temperature, mass loss rate, flame height and residue composition, were studied for three hydrocarbon liquids (n-octane, dodecane and hexadecane) and two crude oils (DUC and REBCO). Based on the models-experiments comparison, it was suggested that crude oil burns according to a distillation-like mechanism, with the light components burning off first, followed by increasingly heavier components as the burning progresses. Thus, in order for the crude oil to burn near 100%, the surface temperature must continuously increase to evaporate the heaviest components. Small scale experiments were deemed to lack a sufficient flame volume and resulting heat feedback to the fuel surface to reach such temperatures, thus explaining the lower burning efficiencies. Small scale experiments featuring an external heat source to simulate the larger fire size are currently in process.  Key-words: in-situ burning, burning efficiency, scaling. 1 Index 

Scaling of the burning efficiency for multicomponent fuel pool fires

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Scaling of the burning efficiency for multicomponent fuel pool fires

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