ENGINEERING JOURNAL CHIANG MAI UNIVERSITY

Volume 26, No. 02, Month AUGUST, Year 2019, Pages 47 - 65

Analysis loss in combustion system suction duct of a coal-fired power plant by cfd

Pakawhat Khumkhreung and Yottana Khunatorn

Abstract Download PDF

The numerical model simulation was applied in this research for 300 MW coal-fired power plant combustion air system suction side. The purpose was power saving of station service in form of pressure drop reduction. The numerical result of original system showed significant pressure drop regions which were flow measurement instrument, 90o mitered elbow and inlet elbow respectively. After modification each section, it was found that the maximum pressure drop decreased by replacing the flow instrument measurement from orifice airfoil type to be average pitot tube 60 mm diameter because the original installed obstacle at section area flow path up to 65%. The average pitot tube could reduce system pressure drop 72% and save fans power about 42-54.5 kW. The results of modification both elbow by fillet and installation guide vane did not have any significant effect with the overall pressure drop after modify in CFD modeling.

Keywords

Airfoil, CFD, Combustion Air, Pitot Tube

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