Oil and gas fluid flow condensation on copper tubes with hybrid wettability properties
Abdullah K. Okab†*, Karim Egab‡, Khalid Abdulhussain Mohammed†
† Petroleum and gas engineering department, University of Thi-Qar, Thiqar, Iraq
‡ Electromechanical engineering department, Southern Technical University, Basrah, Iraq
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Investigation of condensation heat transfer on hybrid wettability horizontal copper tubes with oil and gas flow is analyzed. The hybrid wettability performed by applying two regions which are hydrophobic and hydrophilic regions. The width of hydrophobic region ranges from 0.5 mm to 1.5 mm while it remains constant of 1.5 mm in hydrophilic region. The hydrophobic region weetability characterized by contact angle of 90 and the wettability of hydropilic regions characterized by contact angles ranging from 60-80. The numerical study was conducted to obtain the optimum width enhancing the condensation performance in oil and gas pipleines. The total thermal resistances in single droplet obtaoned first due to droplet nucleation were considered. The area ratio of hydrophobic to hydrophilic regions is counted in the enhancment of condensation. results show that, the width of hydrophobic regions and the area ratios have a significant effect on condensations performance. The best area ratio is 80% hydrophobic and 20% hydrophilic for improving condensation performance. in addition, the optimum width that enhance the condensation perfomance is 0.5 mm in case of contact angle 90 and 80 for hydrophobic and hydrophilic regions respectively. The condensation performance in case of 0.5 mm width increased by 40% compared to 1.5 mm width of hydrophobic region.