بررسی تأثیر نوع پکینگ بر عملکرد حرارتی برج خنک‌کننده مرطوب با جریان نانوسیال

نوع مقاله : مقاله علمی

نویسندگان
محمد نخعی شریف 1
حمیدرضا گشایشی 2
رضا صالح 3
1 کارشناسی‌ارشد، مهندسی مکانیک، دانشگاه آزاد اسلامی، مشهد، ایران
2 استاد، مهندسی مکانیک، دانشگاه آزاد اسلامی، مشهد، ایران
3 دانشیار، مهندسی مکانیک، دانشگاه آزاد اسلامی، مشهد، ایران
10.22034/stme.2025.523322.1130
چکیده
برج‌های خنک‌کننده مرطوب از اجزای مهم در بسیاری از سامانه‌های صنعتی و نیروگاهی محسوب می‌شوند. پکینگ‌ها به‌عنوان بخش اصلی انتقال حرارت و جرم در این تجهیزات هستند و بهینه‌سازی عملکرد آن‌ها همواره موردتوجه محققان بوده است. در این پژوهش، تأثیر نرخ جریان نانوسیال بر عملکرد حرارتی دو نوع پکینگ مختلف، شامل پکینگ فیلمی و اسپلش، در یک برج خنک‌کننده مرطوب موردبررسی تجربی قرار گرفته است. برای این منظور، یک مدل آزمایشگاهی از برج خنک‌کننده باقابلیت تعویض پکینگ و واپایش دقیق شرایط عملیاتی طراحی و ساخته شد. سیال عامل در این مطالعه، نانوسیال پایه آبی حاوی نانوذرات اکسید آهن بود که به دلیل خواص حرارتی مطلوب، در نرخ‌های مختلف جریان به کار گرفته شد. نتایج به‌دست‌آمده نشان داد که با کاهش نرخ جریان نانوسیال، عملکرد حرارتی برج در هر دو نوع پکینگ افزایش یافت، اما عملکرد پکینگ اسپلش بهتر از پکینگ فیلمی بود. دامنه خنک‌سازی، راندمان و مشخصه عملکرد در پکینگ اسپلش به ترتیب ۱۴/۷%، ۹/۹% و ۳۲% بهینه‌تر از نوع فیلمی به دست آمد. بهبود عملکرد پکینگ اسپلش عمدتاً به افزایش سطح تماس سیال و هوا، و ایجاد آشفتگی بیشتر در جریان نسبت داده می‌شود. این تحقیق نشان می‌دهد که انتخاب مناسب نوع پکینگ می‌تواند به افزایش بازده حرارتی برج‌های خنک‌کننده مرطوب منجر شود و در طراحی بهینه آن‌ها نقش مؤثری ایفا کند.
کلیدواژه‌ها
برج خنک‌کننده
پکینگ اسپلش
پکینگ فیلمی
دبی
راندمان
موضوعات

عنوان مقاله English

Investigation of the Effect of Packing Type on Thermal Performance of a Wet Cooling Tower Using Nanofluid Flow

نویسندگان English

Mohammad Nakhaee Sharif 1
Hamid Reza Goshayeshi 2
Reza Saleh 3
1 M.Sc., Department of Mechanical Engineering, Islamic Azad University, Mashhad, Iran
2 Professor, Department of Mechanical Engineering, Islamic Azad University, Mashhad, Iran
3 Associate professor, Department of Mechanical Engineering, Islamic Azad University, Mashhad, Iran
چکیده English

Wet cooling towers are important components in many industrial and power plant systems. Packings are the main part of heat and mass transfer in these equipment’s, and optimizing their performance has always been of interest to researchers. In this study, the effect of nanofluid flow rate on the thermal performance of two different types of packing, including film and splash packing, in a wet cooling tower was experimentally investigated. For this purpose, a laboratory model of a cooling tower with the ability to replace the packing and accurately control the operating conditions was designed and built. The working fluid in this study was a water-based nanofluid containing iron oxide nanoparticles, which was used at different flow rates due to its favorable thermal properties. The results obtained showed that by reducing the nanofluid flow rate, the thermal performance of the tower increased in both types of packing, but the performance of splash packing was better than that of film packing. The cooling range, efficiency and performance characteristics of splash packing were 14.7%, 9.9% and 32% more optimal than the film type, respectively. The improvement in splash packing performance is mainly attributed to the increase in the fluid-air contact area and the creation of more turbulence in the flow. This research shows that the appropriate choice of packing type can lead to an increase in the thermal efficiency of wet cooling towers and play an effective role in their optimal design.

کلیدواژه‌ها English

Cooling Tower
Splash Packing
Film Packing
Flow Rate
Efficiency

اصل مقاله

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