In designing propane quenching systems, a number of concerns arise with the specific fluids properties, thermal, and structural behavior of the system. In this work, the fluid-based loading on a quenched piping system is examined using computational fluid dynamics (CFD). Fluids loading is assessed during an event when a propane line is liquid quenched prior to a recycle valve opening event. During the event, hot vaporous propane is quickly exhausted into the quenched pipe. The CFD studies suggest that the loading in such an event is much larger than a similar event where the line is not quenched. Several aspects of the quench are shown to increase the loads with respect to the non-quench line, and appear to be associated with two mechanisms. The first load amplifying mechanism is the reduction of sound speed in a liquid/vapor mixture. This effect impacts the axial load in the pipe, and increases it multiple orders of magnitude as compared to a pure vapor flow. The second load increasing mechanism observed was due to slug formation. It was found that when considering quench stream droplets, stratification layers are likely to develop eventually within long pipes as the velocity from the nozzles is dissipated in the large line. In the pipe investigated, the hot, high-speed vapor blows the stratified liquid into a slug. When the slug makes turns through elbows, the pipe axial load increased even more. Simultaneously, a similar scale, perpendicular load was also observed. The overall results suggest that these loading events are not small and should be considered in the structural design and layout of a quenching system. The series of results also indicates that CFD provides a valuable tool for assessing complex two phase fluid issues, in particular for the loading on a pipe.
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ASME 2013 International Mechanical Engineering Congress and Exposition
November 15–21, 2013
San Diego, California, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5631-4
PROCEEDINGS PAPER
CFD Loading Assessments on a Liquid Quenched Propane System
Michael P. Kinzel,
Michael P. Kinzel
Bechtel, BSII, Reston, VA
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David Messersmith,
David Messersmith
Bechtel OG&C, Houston, TX
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Christopher Kennedy,
Christopher Kennedy
Bechtel, BSII, San Francisco, CA
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Ajay Prakash,
Ajay Prakash
Bechtel, BSII, San Francisco, CA
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Jonathan Berkoe,
Jonathan Berkoe
Bechtel, San Francisco, CA
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Leonard Joel Pelter,
Leonard Joel Pelter
Bechtel, BSII, Reston, VA
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Kelly J. Knight
Kelly J. Knight
Bechtel, BSII, Reston, VA
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Michael P. Kinzel
Bechtel, BSII, Reston, VA
Sanjeeb Pal
Bechtel, BSII, Reston, VA
Philip Diwakar
Bechtel, BSII, Houston, TX
David Messersmith
Bechtel OG&C, Houston, TX
Sanjay Ganjam
Bechtel OG&C, Houston, TX
Prakash Desai
Bechtel OG&C, Houston, TX
Christopher Kennedy
Bechtel, BSII, San Francisco, CA
Ajay Prakash
Bechtel, BSII, San Francisco, CA
Jonathan Berkoe
Bechtel, San Francisco, CA
Leonard Joel Pelter
Bechtel, BSII, Reston, VA
Kelly J. Knight
Bechtel, BSII, Reston, VA
Paper No:
IMECE2013-65209, V07AT08A046; 14 pages
Published Online:
April 2, 2014
Citation
Kinzel, MP, Pal, S, Diwakar, P, Messersmith, D, Ganjam, S, Desai, P, Kennedy, C, Prakash, A, Berkoe, J, Pelter, LJ, & Knight, KJ. "CFD Loading Assessments on a Liquid Quenched Propane System." Proceedings of the ASME 2013 International Mechanical Engineering Congress and Exposition. Volume 7A: Fluids Engineering Systems and Technologies. San Diego, California, USA. November 15–21, 2013. V07AT08A046. ASME. https://doi.org/10.1115/IMECE2013-65209
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