توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Novel Cold Flow Hydrate Technology and Comparison of Cooling Processes: Review
اطلاعات انتشار: اولین همایش ملی هیدرات گازی ایران، سال
تعداد صفحات: ۱۰
Hydrate technology is considered as one of the transportation systems with high gas capacity. Whereas, the amount of methane in hydrates is about 170 times more than the conditions for transfer of natural gas in a certain volume. Cold flow technology is known as a novel developing method that concern cost–effective flow of oil, gas and water mixtures in deepwater production pipelines without the constant use of additives, pipeline insulation, and pipeline and mixture heating to prevent freezing hydrate formation and deposition. In improved cold flow technology, some particular additives may be used to increase the volume of the produced hydrate. Enhancement of natural gas transport capacity due to low volume of gas hydrate declines in energy consumption for natural gas transportation and reduce the need to inhibitors which can reduce dramatically transport expenses. The aim of this manuscript is to introduce one of the newest contrivances methods of the flow hydrate technology. In addition, other aim of the manuscript is to compare two famous development concepts in the flow hydrate technology by review of presented works in literature about general and simple heat and mass balance calculations. Two different presented methods in literature for hydrate production will be compared to each other. The calculation on the cooling process shows that several parameters play an important role in the cold flow technology such as overall heat transfer coefficient (OHTC), gas–oil–ratio (GOR) and water–cut (WC).<\div>

۲Modeling of dissolving of nano–core–shell particles in two phase viscosity prediction during polymer flooding
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۴
Core–shell particle has been found many applications in different industries. Hydrophilic nano and micro particles covered with a nano–layer of hydrophobic polymeric materials can be used in many industries including enhanced oil recovery methods. The main purpose of this paper is modelling and simulation of dissolution of core and shell layer in two phase flow of immiscible fluids. In particular, the governing equations of the process are obtained and numerically solved using finite difference scheme. The coating dissolution is considered as diffusion in a spherical coordinate followed by polymer chain disentanglement through a diffusion boundary layer. Moreover, a swellable–chain disentanglement model is considered for inside polymer dissolution into the water phase in which the glassy polymer starts swelling due to water penetration and simultaneously changes from the glassy to the rubbery state. Defining proper dimensionless parameters and fixing the moving boundary conditions, the governing equations are discretized using fully implicit scheme and solved with Broyden method. The numerical results show that how the polymer is dissolving during the polymer flooding. By measuring the viscosity of the polymer solution with respect to the polymer concentration in the laboratory, we compute the viscosity increasing of the water phase during the polymer flooding versus time<\div>
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