A new predictive model is developed to analyze hydrate formation with coupled heat and mass transfer in a pipe. The model tracks the particle velocity at each time step, while estimating the growth of the hydrate using the change in Biot number and dimensionless time. The numerical results are validated experimental results for R134a hydrates. The effects of change in heat transfer ratio, phase change number, superheating, and pipe diameter on hydrate formation are reported in this paper. The results indicate that higher heat transfer ratio between the internal and external fluids reduces the possibility of hydrates creating a blockage in the pipeline. The pipes with smaller diameters are also found to reduce the possibility of hydrate formation at a constant pipeline pressure. The results show that at temperatures below −10 °C, changing thermophysical properties have limited impact on the rate of hydrate formation in the pipe.
Heat transfer and multiphase flow with hydrate formation in subsea pipelines
Heat and Mass Transfer ; 51 , 7 ; 901-909
2015
9 Seiten
Article (Journal)
English
Modelling of hydrate growth and initiation in multiphase pipelines
Tema Archive | 2005
|Tema Archive | 1999
|Geotechnics for subsea pipelines
Tema Archive | 2011
|Leakage detection on multiphase flow pipelines
Tema Archive | 2002
|