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Corresponding Author

Alaa Abdulmunem Lateef

Subject Area

Mechanical Power Engineering

Article Type

Original Study

Abstract

This work presents an experimental study of the effect of some parameters affecting the rate of air flow through a chimney. A test rig consists of an electrically heated base plate to replace solar energy and a chimney was placed on top of it through a hood. Two chimney configurations are used, namely straight vertical chimney and convergent chimney. The heated base plate has different heat intensities. Both the height of the chimney - the diameter of the chimney - cone angles and gap height have been changed. From the results of a straight chimney, it was found that: increasing the heat flux density by 204% increases the air mass flow rate by 159% to 87% at chimney height changes from 1 m to 3 m, respectively. Also, increasing the chimney height by 200% increases the air mass flow rate by 145% to 37.4%. Increasing the chimney diameter by 220% at chimney height of 2 m increases the air mass flow rate by 122% to 46%. For a chimney height of 2 m and diameter of 0.1 m when gap thickness increases by 400%, the air mass flow rate decreases by 29% and 39% W/m2. From the experimental results of the convergent chimney, it was concluded that: when half the chimney angle increases from 0º to 3.43º, the air mass flow rate decreases by 60% to 33.5%.

Keywords

Effect of chimney configuration, Solar chimney, Heat flux density, Air gap height, Tube of different lengths and diameters.

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