HEAT LOSS MODEL OF FLUID FLOW THROUGH A DEEP SEA FLOWLINE WITH VARIOUS CROSS-SECTIONAL SHAPES

• Main Author: Zakiah Drajat, Rizka
• Format: Theses
• Language: Indonesia
• Subjects: Matematika
• Online Access: https://digilib.itb.ac.id/gdl/view/33842
• Institution: Institut Teknologi Bandung

Fluid ow through a owline in the sea bottom faces many obstacles. The temperature of the uid inside the owline of about 1-3 km depth is high around 80-85o C, while the surrounding temperature of the sea water is very low , approximately 2-4o C. The dierence between the inside and outside owline temperature causes heat loss to occur. Furthermore, it leads to accelerate the wax or condensate formation which in turn forms a barrier for uid ow. Motivated by this phenomenon, in this thesis we study the eect of cross-sectional geometry of owline on the value of heat loss, and we restrict ourselves to consider regular polygonial cross- sections only. Our results show that a circle has minimum heat loss energy compared to other polygons. However, this shape produces the lowest uid rates compared to other polygons. To nd a polygon with low heat loss as much as circle but gaining high ow rate of uid, an alternative shape of owline can be design by controling the cross-sectional thickness of owline and the material property. These alternative shapes turns out to be hexagons, heptagons, and octagons.