کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5013005 1462829 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical design and investigation of heat transfer enhancement and performance for an annulus with continuous helical baffles in a double-pipe heat exchanger
ترجمه فارسی عنوان
طراحی و بررسی عناصر افزایش انتقال حرارت و عملکرد آن برای یک حلقه با بافرهای اسپیرال پیوسته در مبدل حرارتی دو لوله
کلمات کلیدی
سوپر اسپلیترهای مداوم، آب به آب مبدل حرارتی، افزایش انتقال حرارت، دو لوله، اصطکاک، عددی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
In this paper, the design and thermo-hydraulic performance of a double pipe heat exchanger with helical baffles in the annulus side, are investigated numerically. Three-dimensional computational fluid dynamics (CFD) model, using the software FLUENT, have been performed to investigate the annulus side fluid flow, heat transfer coefficient and pressure drop for different configurations. A numerical analysis is conducted for different values of Reynolds number and baffle spacing (0.025-0.1 m). The numerical model was first validated for a simple double pipe heat exchanger by comparison with empirical correlations. The model was then used to investigate the helical baffles effects. The results obtained for a helically baffled annulus side provide enhanced heat transfer performance and high-pressure drop compared to the simple double-pipe exchangers. Thermal performance and high-pressure drop is an increasing function of baffle spacing and Re. In addition, empirical correlations expressing the results were developed based on curve fitting.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 133, 1 February 2017, Pages 76-86
نویسندگان
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