مهندسی شیمی ایران

مهندسی شیمی ایران

تحلیل تجربی و شبیه‌سازی ناپایداری سرج در توربوکمپرسورهای واحد تبرید پالایشگاه گاز سرخون و قشم: توسعۀ ابزار پایش و تعیین محدودۀ ایمن عملکرد

نوع مقاله : مقاله پژوهشی

نویسندگان
1 شرکت ملی گاز ایران، پالایشگاه سرخون و قشم
2 دانشیار مهندسی مکانیک، دانشگاه هرمزگان
3 مربی مهندسی مکانیک، دانشگاه هرمزگان
4 استادیار مهندسی مکانیک، مجتمع آموزش عالی لارستان
چکیده
کاهش خوراک ورودی به پالایشگاه‌ گاز سرخون و قشم منجربه کاهش ظرفیت کمپرسورهای واحد تبرید نسبت‌به شرایط طراحی شده و احتمال بروز ناپایداری‌هایی ازجمله سرج افزایش‌یافته‌است. در این پژوهش، فرایند تبرید پالایشگاه بااستفاده‌از نرم‌افزار Aspen HYSYS و مدل ترمودینامیکی پنگ-رابینسون براساس شرایط عملیاتی شبیه‌سازی‌شد. دقت شبیه‌سازی بااستفاده‌از مجموع مربعات خطا برای دبی، فشار و دما به‌ترتیب برابربا 516/1کیلومول بر ساعت، 0/176 کیلوپاسکال و 2/861درجۀ سلسیوس ارزیابی‌شد. به‌منظور غلبه‌بر محدودیت‌های ناشی از عدم دسترسی به نمودار مشخصۀ کمپرسور، برای نخستین‌بار آزمون‌های عملیاتی در سه سرعت مختلف کمپرسور انجام‌گرفت و شرایط سرج به‌صورت واقعی بررسی‌شد. همچنین، برای پایش پدیدۀ سرج، از سنسورهای ارتعاشی استفاده‌شد تا رفتار دینامیکی کمپرسورها با دقت بیشتری ارزیابی‌شود. سرانجام، داده‌های تجربی و نتایج شبیه‌سازی در قالب یک نرم‌افزار کاربردی مبتنی‌بر اکسل ارائه‌شد که امکان پایش وضعیت عملیاتی کمپرسورها، تصمیم‌گیری سریع و افزایش ایمنی بهره‌برداری را فراهم‌کرد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Experimental Investigation and Simulation of Surge Instability in Turbo-Compressors of the Refrigeration Units at Sarkhun and Qeshm Gas Refinery: Development of a Monitoring Tool and Identification of Safe Operating Limits

نویسندگان English

Y. Hasanzade 1
F, Hamzavi 1
A. Ghobadi 1
A. R. Rahimi 1
O. Mostaghisi 1
A. Saadat 1
S. A. Razavizadeh 1
S. Niazi 2
A. Ansarinasab Minabi 3
S. Ghafari 4
1 National Iranian Gas Company(NIGC), Sarkhun and Qeshm gas company(SQGC)
2 Associate Professor of Mechanical Engineering, Hormozgan University
3 Instructor of Mechanical Engineering, Hormozgan University
4 Associate Professor of Mechanical Engineering, Larestan University
چکیده English

The reduction in feed gas supplied to the Sarkhun and Qeshm Gas Refinery caused the refrigeration unit compressors to operate considerably below their design capacity, thereby increasing the risk of process instabilities, particularly compressor surge. In this study, the refrigeration cycle of the refinery was simulated using Aspen HYSYS software in conjunction with the Peng–Robinson thermodynamic equation of state, based on real operating data. Model accuracy was assessed through the sum of squared errors, yielding deviations of 1.516 kmol/h in flow rate, 0.176 kPa in pressure, and 2.861°C in temperature.
To overcome the limitations associated with the unavailability of compressor characteristic curves, operational performance tests were conducted for the first time at three distinct compressor rotational speeds, enabling a realistic evaluation of surge onset conditions. Furthermore, vibration sensors were implemented to continuously monitor dynamic compressor behavior and accurately detect surge events.
The experimental findings and simulation outcomes were subsequently integrated into an Excel-based decision-support tool, enabling real-time operational monitoring, enhancing decision-making efficiency, and improving overall process safety.

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