کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1550935 998111 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Correlations for solar air heater duct with dimpled shape roughness elements on absorber plate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Correlations for solar air heater duct with dimpled shape roughness elements on absorber plate
چکیده انگلیسی

An experimental investigation has been carried out for a range of system and operating parameters in order to analyse the effect of artificial roughness on heat transfer and friction characteristics in solar air heater duct which is having dimple shaped elements arranged in angular fashion (arc) as roughness elements on absorber plate. Duct has an aspect ratio (W/H) of 11, relative roughness pitch (p/e) range of 10–20, relative roughness height (e/Dh) range of 0.021–0.036, arc angle (α) range of 45–75° and Reynolds number (Re) ranges from 3600 to 18,000. A considerable increase in heat transfer and friction loss has been observed. The experimental data have been used to develop Nusselt number and friction factor correlations as a function of roughness parameters and operating parameters.


► An experimental study has been carried out on roughened solar air heater.
► Nusselt number and friction characteristics for dimple shaped roughness element.
► Correlations for Nusselt number and friction factor have also been developed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy - Volume 86, Issue 9, September 2012, Pages 2852–2861
نویسندگان
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