کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
648997 884639 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of the natural convection phenomena inside a wall solar chimney with one wall adiabatic and one wall under a heat flux
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Study of the natural convection phenomena inside a wall solar chimney with one wall adiabatic and one wall under a heat flux
چکیده انگلیسی

Four wall solar chimneys have been constructed and put at each wall and orientation of a small-scale test room so as to be used for the evaluation and measurement of their thermal behavior and the certification of their efficiency. At this stage, research focuses on the study of the buoyancy-driven flow field and heat transfer inside them. A numerical investigation of the thermo-fluid phenomena that take place inside the wall solar chimneys is performed and the governing elliptic equations are solved in a two-dimensional domain using a control volume method. The flow is turbulent and six different turbulence models have been tested to this study. As the realizable k–ε model is likely to provide superior performance for flows boundary layers under strong adverse pressure gradients, it has been selected to be used in the simulations. This is also confirmed by comparing with the experimental results. Predicted velocity and temperature profiles are presented for different locations, near the inlet, at different heights and near the outlet of the channel and they are as expected by theory. Important parameters such as average Nusselt number are also compared and calculated at several grid resolutions. The developed model is general and it can be easily customised to describe various solar chimney’s conditions, aspect ratios, etc. The results from the application of the model will support the effective set-up of the next configurations of the system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 27, Issue 13, September 2007, Pages 2266–2275
نویسندگان
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