Basic Concepts of Ventilation Design - GHDonline
Basic Concepts of Ventilation Design - GHDonline
Basic Concepts of Ventilation Design - GHDonline
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1<br />
Bench Grinder Exhaust <strong>Ventilation</strong><br />
S Ph<br />
• Now add the hood entry loss:<br />
Duct diameter = 3 inches<br />
Area = 0.0668 ft 2<br />
2 3<br />
SP h = VP 2 + h e = VP 2 + (F h ) (VP 2 )<br />
Assume that the hood energy loss factor for this hood is 0.40<br />
V = 4490 fpm<br />
• SP h = 1.26 + (0.40) (1.26) = 1.76 in w.g.
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