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http://hdl.handle.net/2282/413
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| Title: | Computational study of heat transfer in subsea deadlegs for evaluation of possible hydrate formation |
| Authors: | Andersen, Hilde |
| Issue Date: | 2007 |
| Abstract: | The background for this project is the request of achieving more knowledge of the temperature and velocity fields in
different subsea deadleg geometries. This is important to avoid hydrate formation in subsea equipment. The
literature review revealed only a few studies on this topic. Two studies on corrosion, both experimental and
numerical, in subsea deadlegs where performed by Habib. Results show almost stagnant flow 3-4 Di into the
deadleg.
To study the heat transfer in such systems, two deadlegs was modeled in Fluent, a vertical and a horizontal oriented
deadleg. The choice of geometry and some input data is based on the former work done by IFE and Habib and his
crew. The simulations where run with two different velocities and outer heat transfer coefficient. The effect of
buoyancy in the vertical deadleg is also investigated. The results shows that the vertical deadleg has a more abrupt
temperature profile outwards in the deadleg than the horizontal. For tree of the eight cases, the temperature crosses
the HET (hydrate equilibrium temperature) and is therefore in the temperature range where hydrates will start to
form. To be able to suggest a design criterion for subsea deadlegs, this problem should be further investigated. |
| Keywords: | Subsea deadleg geometry
Simulations
Subsea deadleg
Velocity
Temperature |
| Document type: | Master's thesis |
| URI: | http://hdl.handle.net/2282/413 |
| Appears in Collections: | Mastergradsavhandlinger i teknologi
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