D The Following Figure Q4 D Shows A Typical Duct Layout Using The Equal Friction Design Method And Friction Chart I 1 (52.55 KiB) Viewed 29 times
D The Following Figure Q4 D Shows A Typical Duct Layout Using The Equal Friction Design Method And Friction Chart I 2 (91.5 KiB) Viewed 29 times
D The Following Figure Q4 D Shows A Typical Duct Layout Using The Equal Friction Design Method And Friction Chart I 3 (91.5 KiB) Viewed 29 times
D The Following Figure Q4 D Shows A Typical Duct Layout Using The Equal Friction Design Method And Friction Chart I 4 (39.9 KiB) Viewed 29 times
(d) The following Figure Q4 (d) shows a typical duct layout. Using the equal friction design method and friction chart in Figure Q4 (a-i) on page 15, determine the size of each ducting section if using rectangular ducts with the maximum velocity of air allowed in the system as 1400 ft/min and the duct depth can be 20 in. maximum with aspect ratio, not more than 3. You also need to fill the Table Q4 (d) on page 17: Fan 60' A 80' B 70' 500 500 400 400 CFM ↑ 300 50' 65' 50' 40' 400 Figure Q4 (d) 65' 500 CFM (12 marks)
100,000 80,000 80,000 40.000 30,000 20,000 10,000 8000 6000 4000 3000 2000 400 300 200 100 80 60 30 20 -70- 1000 800 201 600 18 £10% 14 10 60- Pos £200 24° 12 Fpm velocity 01 181880 02 03 04 06 08.1 2 3 81.0 Friction Loss, is w. per 100 It Figure Q4 (a-i): Friction loss for air flow in galvanized steel round ducts. 500 2 34 610
Section AB 2825252 BC CD DE EF BG GH HJ CFM V, ft/min Table Q4 (d) Friction Loss, in. w. per 100 ft Eq. D, In. Rect. Duct Size, In. Aspect Ratio
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