Efficiency Improvement of a Rotary Gas Separator by Parametric Study and Gas/Liquid-Flow Analysis
- Shahram Derakhshan (Iran University of Science and Technology) | Fazel Riahi (Iran University of Science and Technology) | Mohamad Bashiri (Amirkabir University of Technology (currently with Iran University of Science and Technology))
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- May 2018
- Document Type
- Journal Paper
- 320 - 335
- 2018.Society of Petroleum Engineers
- Inducer, ESP-RGS, Centrifugal pump, Gas-Liquid, Separation
- 10 in the last 30 days
- 173 since 2007
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In this study, a gas/liquid flow has been numerically investigated in a rotary gas separator (RGS) to improve the performance of the RGS. One-phase flow and then two-phase flow were analyzed in an inducer, which is the main component of the RGS. A parametric study showed that reduced blade thickness and a higher number of blades increased the inducer’s head. However, an inducer with two blades generated greater head. Higher inlet-flow temperature (by inlet preheating) improved operation conditions, especially in lower flows. In addition, smaller bubble sizes led to a lower head. Alternately, the changes are not significant, and results are close and similar in smaller sizes. In the next step, the performance of the designed RGS was analyzed by computational fluid dynamics (CFD) and validated with available experimental data. Then, the effect of the quantity of the gas-output ports on the RGS’s efficiency was studied. As a result, the system with four ports was suggested as optimal. Moreover, results showed that increasing the length of the separator zone leads to increasing the efficiency until reaching an optimal length equal to the length of the inducer zone. Finally, the effect of the blade number was studied for various rated points.
|File Size||1 MB||Number of Pages||16|
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