معرفی یک سامانه ابتکاری توموگرافی القای الکترومغناطیسی برای اندازه‌گیری چگالی سیال چندفازی

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی ماشین‌های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، دانشکدگان کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

چکیده

چکیده: سیال‌های چندفازی، بخش اصلی بسیاری از فرایندهای صنعتی هستند و به همین دلیل پایش و کنترل آن‌ها از اهمیت ویژه‌ای برخوردار است. چگالی یکی از مهمترین مشخصه‌های سیال بوده و اندازه‌گیری برخط آن برای پایش و کنترل سیال امری ضروری است. در این پژوهش یک سامانه توموگرافی القای الکترومغناطیسی با جریان اعمالی (AC-MIT) برای اندازه‌گیری چگالی سیال چندفازی درون لوله طراحی و ساخته شد. بخش‌های اصلی این سامانه شامل حسگرهای فرستنده و گیرنده، سامانه تحصیل داده و الگوریتم حل مسئله می‌باشد. در این سامانه از حسگرهای فرستنده ابتکاری استفاده شد که شامل دو الکترود حلقوی بوده و بر روی دیواره محیط نصب می‌شوند. حسگرهای گیرنده شامل تعدادی کویل هستند که دورتادور محیط موردنظر و با فاصله یکسان قرار می‌گیرند. حل مسئله معکوس در سامانه AC-MIT با استفاده از الگوریتم حل تکراری گوس-نیوتن و روش منظم‌سازی تیخونوف انجام شد. در ارزیابی عملکرد سامانه از آب شور به عنوان فاز حامل و مخلوط خاک و ماسه به عنوان فاز جامد استفاده شد. تاثیر تغییرات دما و شوری بر روی چگالی اندازه‌گیری شده توسط سامانه در پنج سطح مختلف با استفاده از روش سطح پاسخ و تجزیه واریانس مورد بررسی قرار گرفت. نتایج ارزیابی‌ها نشان داد که بین غلظت‌های جرمی اندازه‌گیری شده در دو حالت اندازه‌گیری دستی (به عنوان شاهد) و اندازه‌گیری توسط سامانه AC-MIT یک رابطه خطی با ضریب تعیین قابل قبول (بازه 98/0 تا 99/0) وجود دارد. نتایج تحلیل‌های آماری نشان داد که سطوح مختلف دما و شوری فاز حامل و همچنین اثر متقابل آن‌ها، تاثیر معنی‌داری بر عملکرد سامانه ندارد.

کلیدواژه‌ها


عنوان مقاله [English]

Introducing an Innovative Magnetic Induction Tomography System for Measuring Multiphase Flow Density

نویسندگان [English]

  • Jalil Taghizadeh-Tameh
  • Hossein Mousazadeh
  • shahin rafiee
  • Nazilla Tarabi
Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

: Multiphase flows are a major part of many industrial processes, and therefore their monitoring and control is importance. Density is one of the most important characteristics of fluid and its online measurement is essential for the fluid monitoring and control. In this research, an applied current magnetic induction tomography (AC-MIT) system was designed and constructed to measure the density of multiphase flow in pipeline. The main components of the AC-MIT system include the transmitter and receiver sensors, data acquisition system and problem solving algorithm. In AC-MIT system, innovative transmitter sensors were used, which include two annular electrodes and mounted on the wall of the media. Receiver sensors include a number of coils that are installed around the media. Iterative Gauss-Newton algorithm with Tikhonov regularization method was used to solve the inverse problem. To evaluate performance of the AC-MIT system, Saline water and soil-sand mixture were used as the liquid and solid phase, respectively. The effect of temperature and salinity levels (Five different temperature and salinity levels) was investigated using the response surface method and ANOVA. The results showed that there is a linear relationship between the mass concentrations measured in the two modes (manual measurement and measured by AC-MIT system) with an acceptable coefficient of determination (R2 in the range of 0.98 to 0.99). The results of statistical analysis showed that different levels of temperature and salinity of the carrier phase as well as the interaction of temperature and salinity did not have a significant effect on system performance.

کلیدواژه‌ها [English]

  • Annular electrodes
  • Iterative Gauss-Newton algorithm
  • Biot-Sawart law
  • Ill-posed problem
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