توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱WAVE PROPAGATION IN RUPTURED PIPELINES AND GAS RELEASE RATE FROM RUPTURED AREAS
اطلاعات انتشار: اولین کنفرانس بین المللی نفت، گاز، پتروشیمی و نیروگاهی، سال
تعداد صفحات: ۶
In the present paper, a numerical solution is developed to estimate gas release rate fromaccidentally damaged pipelines and to predict thebehavior of gas in pipe after rupture which can be used for detecting the location of the rupture. The solution is based on one–dimensional MacCormack’s Technique. Results show that after accidental rupture some disturbances in pressure and other variables involving the problem will appear and propagatethrough the fluid. Finally release rate from damaged area is calculated by modeling the flow at leakage as a flow through a converging nozzle.<\div>

۲Predicting Asphaltene Precipitation Using Modified Flory–Huggins Theory; Case Study of an Iranian Oil Reservoir
اطلاعات انتشار: هفتمین کنگره ملی مهندسی شیمی، سال
تعداد صفحات: ۱۱
Asphaltene precipitation is one of the crucial problems in oil industry. any changes in pressure, temperature, composition may causes asphaltene precipitation. The high cost of remediating asphaltene deposition in crude oil production and processing, has necessitated the development of the methods for determining the stability of asphaltenes in crude oils and also predicting the asphaltene precipitation during different conditions.Different models are presented for prediction of asphaltene precipitation. Available thermodynamic models for asphaltene precipitation prediction are essentially divided into three groups. In this study a thermodynamic model based on molecular thermodynamic and solubility model is presented which able to predict asphaltene precipitation in a wide range of pressure (from reservoir pressure to atmospheric pressure) and temperature. This model is a modification on Flory–Huggins solution theory with a correctly tuned equation of state for calculation of solubility parameter of liquid oil.Also, This study concerns with experimental investigations of asphaltene precipitation at reservoir conditions of a crude sample from an Iranian oil reservoir during pressure depletion. High pressure high temperature set up and filtration method was used to quantify amount of precipitated asphaltene at different pressures. The experimental results have been used to develop the new asphaltene precipitation model.Comparing the results of the model with experimental data shows an excellent match spiciaaly at reservoir conditions.<\div>

۳Enhancing light trapping in thin film solar cells employing plasmonic nanowires with triangular cross sections
نویسنده(ها): ،
اطلاعات انتشار: اولین طرح تعاملی صنعت با دانشگاه: همایش سالانه پژوهش های کاربردی در علوم مهندسی و پایه، سال
تعداد صفحات: ۷
to enhance light absorption in thin–film crystalline silicon solar cells, we propose a novel structure containing triangular nanogratings both on top and at the bottom of absorbing layer. This combination leads to broadband absorption enhancement due to the excitation of both plasmonic and photonic modes.<\div>

۴Microwave Resonate Circuit for Detection of Heavy Metal
نویسنده(ها):
اطلاعات انتشار: سومین کنفرانس ملی و اولین کنفرانس بین المللی پژوهش هایی کاربردی در مهندسی برق، مکانیک و مکاترونیک، سال
تعداد صفحات: ۵
This paper presents the development and design of proximity coupled feed disk resonator as a microwave sensor to detect environment pollution. This sensor system consists of a two–layer Flame Retardant (FR–4) circular disk resonator coated with Oil Palm empty Fruit bunch Bio–char (EFB) for absorbing environment pollution. The best design of disk resonator is chosen based on simulation results using Computer Simulation Technology (CST) microwave studio software. EFB are physically coated to the top of first layer of circular disk resonator using conductive epoxy. Disk resonator is connected to the Vector Network Analyzer (VNA) and measured return loss (S11) of disk resonator shows sharp dip in its resonant frequency. Heavy metals as an important environments pollutant are investigated by biochar microwave resonant circuit in this paper. After adding Heavy metals ions on the top of disk resonator and interaction with EFB based on the changes in the effective dielectric constant, the resonant frequency of patch disk resonator is changed. Experimental results have shown 0.8 MHz change in resonant frequency of disk resonator upon exposure to Fe ions. Based on operating frequency (5.5 GHz) this technique can be used in network sensor systems and remote sensing to measure environment pollution in future research.<\div>
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