Ventilation Systems: Operation and Testing - GHDonline
Ventilation Systems: Operation and Testing - GHDonline
Ventilation Systems: Operation and Testing - GHDonline
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Types of Pressure Measurements<br />
• Static Pressure (S P )<br />
potential energy<br />
can be + or –<br />
bursting or collapsing<br />
measured perpendicular to flow<br />
• Velocity Pressure (V P )<br />
kinetic energy<br />
accelerates from 0 to some velocity<br />
Exerted in direction of flow always +<br />
• Total Pressure (T P )<br />
combined static & velocity components<br />
can be + or -<br />
measure of energy content of air stream<br />
Always decreasing as flow travels<br />
downstream thru a system only rising when<br />
going across a fan<br />
TP = SP + VP<br />
TP<br />
_<br />
+<br />
SP<br />
_<br />
+<br />
VP<br />
+<br />
8
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