طراحی و بررسی عددی جریان‌سنج جرمی حرارتی لوله‬مویین به‌عنوان کنتور گاز خانگی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 صنعتی شاهرود

2 گرگان

چکیده

اندازه گیری دقیق گاز طبیعی همواره مساله مهمی به ویژه در سطح مصارف خانگی بوده است. یکی از انواع جریانسنجهای جرمی، جریانسنج جرمی حرارتی لوله مویین میباشد که برای اندازهگیری جریانهای با دبی پایین استفاده میشود. در این مطالعه شناخت پارامترهای مهم و تاثیر هر یک از این پارامترها در طراحی جریانسنج حرارتی لوله مویین بررسی شده است. برای این کار مدل سه بعدی یک جریانسنج جرمی حرارتی لوله مویین شبیه سازی و انتقال حرارت در لوله حسگر آن به صورت عددی برای گاز متان به عنوان گاز طبیعی تحلیل شده است. با در نظر گرفتن پارامترهای تاثیرگذار عدم قطعیت جریانسنج محاسبه شده است. برای اعتبارسنجی روش حل عددی، به دلیل عدم وجود دادههای آزمایشگاهی برای متان، از نیتروژن برای اعتبارسنجی استفاده شده که تطابق قابل قبولی نشان میدهد. نتایج عددی نشان میدهد که عدم قطعیت این جریانسنجها حداکثر 24/1 درصد بوده که برای کنتورهای خانگی قابل قبول میباشد.

کلیدواژه‌ها

عنوان مقاله [English]

Designing and Numerical Analysis of Capillary Tube Thermal Mass Flowmeter as a Residential Natural Gas Meter

نویسندگان [English]

  • saman parvizi 1
  • mahmood farzaneh gord 1
  • ali jabari moghadam 1
  • majid hashemian 1
  • mehrab aghili bahrami 2
1 shahrood university of technology
2 gorgan
چکیده [English]

Accurate natural gas measurement is an important issue especially in domestic usage levelCapillary tube thermal mass flow meter is one of the most common types of mass flow meters which are mostly used for low mass flow rates. In this work, a capillary tube flow meter was simulated numerically. A three-dimensional steady state heat transfer in its sensor tube was numerically analyzed and the sensitivity of this type of flow meter was investigated. In order to validate the simulation approach and conditions taken in this study, the simulation was also accomplished for Nitrogen, for which experimental data was available in the literature, leading to satisfactory results. Considering all the possible effective parameters, the uncertainty of the flow meter was also calculated. Numerical results show that the maximum amount of uncertainty in measurement for this type of flow meter is less than 1.24% that is acceptable for residential customers.

کلیدواژه‌ها [English]

  • Flow metering
  • Thermal massflowmeter
  • Three-Dimensional heat transfer
  • Capillary tube mass flow meter
  • Residential Natural Gas Meter

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