Thermal Analysis of Crude Oil in Floating Roof Tank Equipped with Horizontal Heating Finned Tube Bundles

Abstract

Keeping crude oil within the working temperature range in floating roof tank is the key to ensure safe operation of oil depot. Tubular heating is one of the conventional and extensive methods to heat crude oil. To improve flow and heat transfer performance of crude oil during heating process, a comprehensive numerical research is presented to investigate heat transfer and flow characteristics of crude oil in which heating tube is arranged with and without fins, and the impact of fin length and fin number on temperature field, flow field and heat flux of crude oil was investigated. The results show that by increasing fin length, the average temperature of crude oil increases and inhomogeneity in temperature decreases. The most homogeneous temperature distribution is attained by the tube with 200 mm length fin where the maximum amplitude is 1.9 ºC. The improvement of heating performance with 4 fins is significant from the aspect of temperature distribution and temperature rise of crude oil. Moreover, the amount of heat flux at the tank wall decreases with increasing fin length and fin number, and maximum decrease is 4.39 % for the tube equipped with 150 mm length fin, while other tank boundaries do not have an apparent changing rule.

Preferential formation of the stereocomplex crystals of poly(L‐lactide) and poly(D‐lactide) blend by epoxidized soybean oil under nonisothermal crystallization

“…The infrared spectra of SO and ESO at room temperature are shown Figure 2. The peaks at 2920 cm −1 and 2850 cm −1 were assigned to C–H stretching; the peak at 1740 cm −1 was assigned to C=O stretch 31 . A signal at 1150 cm −1 31 was assigned to C–O–C stretching caused by the oxirane vibration.…”

“…The peaks at 2920 cm −1 and 2850 cm −1 were assigned to C–H stretching; the peak at 1740 cm −1 was assigned to C=O stretch 31 . A signal at 1150 cm −1 31 was assigned to C–O–C stretching caused by the oxirane vibration. The biggest difference in FTIR patterns between SO and ESO was the observation of the epoxy group at 827 cm −1 in the ESO spectrum 47 .…”

“…ESO is attractive as it is considered a nontoxic plasticizer, but alternative bio‐oils including epoxidized sunflower oil and epoxidized palm oil were investigated as potential additives to PLLA materials 24,29 . Other oils were also investigated, for instance, Mu et al 30 prepared bio‐oils from lignin for advanced lubrication; Li et al 31 performed a thermal analysis of crude oil in a floating tank; Li et al 32 implemented boron oxide/alumina nanocomposites as lubricant oil additives to reduce friction; Mondal et al 33 extracted an innovative peptide from a slurry from a mustard oil refinery to exploit its antimicrobial and anticancer properties and Adilbekova et al 34 investigated the application of fly ash in treatment of water in crude oil emulsions.…”