Petroleum Engineering
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Item Experimental investigation of the potential of liquified petroleum gas in vapour compression refrigeration system(Faculty of Engineering and Technology, LAUTECH, 2023) Adeaga, O. A.; Alabi, O. O.; Akintola, S. A.The essence of refrigeration systems cannot be overemphasized especially in this part of the globe. Perishable items are to be preserved for some periods before usage while human comfort should also be also be paramount since we are in the northern hemisphere of the globe. The device hat doe this uses refrigerants as working fluids which are traditional harmful to human beings through depletion of the ozone layer. Majorly Ozone layer protects the earth from warming which could lead to flooding. Common economical refrigerants like CFCs (Chlorofluorocarbons) have been discovered to be harmful to the earth. This article therefore, experimented the quantity replacement of CFCs with Liquefied Petroleum Gas in various mixes. The LPG (Liquefied Petroleum Gas) used consists a mixture of propane and butane in the ratio 6:4 by mass. The blend of the two refrigerants were shaped essentially by blending at least two single-part refrigerants, the GWP (Global Warming Potentials) of a refrigerant mix is the mass-weighted normal of GWPs of individual parts in the mix. That is, to compute the GWP of a mix, one essentially adds the GWP of the singular parts with respect to their (GWP (LPG) x M (LPG)) + (GWP(R-134a) x M(R-134a)) = GWP (blend). From the evaluated GWP of the 6 different % mass composition, the % mass of (100%/0%) was the only refrigerant to adhere to the preferred GWP. The mass composition of blend (100%/0%) LPG/R-134a was first performed. In order to achieve this, 8kg of each of the refrigerant was used. The blend was formed in an empty cylinder which was measured as 2482g with the aid of a digital beam balance, by gradually injecting LPG into the empty cylinder till the mass percentage of the 2000g entered, making the mass read as 4,482g (i.e., 2482g of the empty cylinder + 2000g of LPG). Based on the above observations, it could be inferred that the COP (Coefficient of Performance) of mixed refrigerants blends was higher than that of R-134a indicating that each of the blend exhibit higher performance. The experiment discovered that LPG could be used in the place of R134a without affecting the operation efficiency of a vapor compression refrigeration system. The study concludes that LPG offers the best alternative when the COP and flammability are combined as performance metrics.Item Numerical modeling and investigation of flow of incompressible non-Newtonian fluids through uniform slightly deformable channel(IEEE Xplore, 2023) Alabi, O. O.; Adeaga, O. A.; Akintola, S. A.Numerical investigations of peristaltic flow of three non-Newtonian viscous fluids arising within modelled gut were performed to show their thermal and hydrodynamic behaviour in the gut. A 3-D numerical model of the human intestine was derived using Autodesk Inventor 2017 and simulated using ANSYS FLUENT 16.0. Thyme and produced Ogi, Soymilk and Sobo are considered working fluids. The density and viscosity of the produced fluid were determined experimentally, while the density and viscosity of the digester were obtained from previous work. The results of the experiments carried out showed that the densities of the produced fluid supplements were; 1024 kg/𝑚3 , 920 kg/𝑚3and 800 kg/𝑚3 for Ogi, soybean milk and sobo respectively; their equivalent viscosities were; 1.095 Pa.s, 0.95 Pa.s, and 0.316 Pa.s. From the results, it can be seen that the velocity behaviour of the four fluids is similar, as is the thermal behaviour. The results also showed that at inlet velocity of 0.005 m/s, Ogi had the largest pressure change of 25 Pa and a heat transfer of Nu=9, while sobo had the smallest heat transfer of Nu=9 among the three fluid supplements produced. Nu=5.Item Development of modified fractional fluid flow equation for non–darcy flow in computer simulation of oil reservoirs(Innovative Societies & Technology Academic Multidisciplinary Society, 2021) Akintola, S. A.; Adeaga, O. A.; Muritala, O. K.Upon the depletion of oil reservoir, huge amount of oil is usually left behind. This oil, in some cases double the initial oil recovered, in order to recover the unrecovered oil, different types of secondary oil recovery techniques can be explored. A more common technique is water flooding which involve the injection of water into reservoir to displace oil into the wellbore. To determine the relative flow rates of oil and water at any point in a porous flow system while also examining factors such as fluid properties, rock properties, reservoir structural properties, pressure gradient, and flow rate which affect the displacement efficiency of a water flooding project, the fractional flow equation is employed. But the convectional fractional flow equation is applicable just to Darcy flow. The use of Darcy flow equation is not applicable in low permeability sandstone reservoir, hence non Darcy flow have been used one of such equation is the Forcheimer equation, as a result this study is aimed at modifying the Forcheimer equation and validating the new fractional flow equation using literature . The result obtained showed that the proposed equation predicts better than Forcheimer equationItem Development of modified fractional flow equation for non-darcy flow in computer simulation of oil reservoirs(2021-06) Akintola, S. A.; Adeaga, O. A.; Muritala, O. K.Upon the depletion of oil reservoir, huge amount of oil is usually left behind. This oil, in some cases double the initial oil recovered, in order to recover the unrecovered oil, different types of secondary oil recovery techniques can be explored. A more common techniques is water flooding which involve the injection of water into reservoir to displace oil into the wellbore. To determine the relative flow rates of oil and water at any point in a porous flow system while also examining factors such as fluid properties, rock properties, reservoir structural properties, pressure gradient, and flow rate which affect the displacement efficiency of a water flooding project, the fractional flow equation is employed. But the convectional fractional flow equation is applicable just to Darcy flow. The use of Darcy flow equation is not applicable in low permeability sandstone reservoir, hence non Darcy flow have been used one of such equation is the Forcheimer equation, as a result this study is aimed at modifying the Forcheimer equation and validating the new fractional flow equation using literature. The result obtained showed that the proposed equation predicts better than Forcheimer equation.