Airwatt: Difference between revisions
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An '''airwatt''' or '''air watt''' is a unit of [[power (physics)|power]] very close to the [[watt]] which is used for various [[vacuum]] cleaning systems, such as [[vacuum cleaner]]s. The airwatt is derived from [[English unit]]s. [[ASTM International]] defines the airwatt as 0.117354 * F * S, where F is the rate of air flow in ft<sup>3</sup>/s and S is the [[pressure]] in [[inches of water]]. This makes one airwatt equal to 0.9983 watts. <ref>{{cite web |url= |
An '''airwatt''' or '''air watt''' is a unit of [[power (physics)|power]] very close to the [[watt]] which is used for various [[vacuum]] cleaning systems, such as [[vacuum cleaner]]s. The airwatt is derived from [[English unit]]s. [[ASTM International]] defines the airwatt as 0.117354 * F * S, where F is the rate of air flow in ft<sup>3</sup>/s and S is the [[pressure]] in [[inches of water]]. This makes one airwatt equal to 0.9983 watts. <ref>{{cite web |url= |
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http://www.unc.edu/~rowlett/units/dictA.html|title= Units: A|accessdate=2008-03-27 |author= Russ Rowlett|date= 2001-03-21|work= How Many? A Dictionary of Units of Measurement|publisher=University of North Carolina at Chapel Hill}}</ref> |
http://www.unc.edu/~rowlett/units/dictA.html|title= Units: A|accessdate=2008-03-27 |author= Russ Rowlett|date= 2001-03-21|work= How Many? A Dictionary of Units of Measurement|publisher=University of North Carolina at Chapel Hill}}</ref> |
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The airwatt is useful measurement of vaccuum power, since the [[power (physics)|power]] carried by a [[fluid dynamics|fluid flow]] (in the case of a typical house vaccuum the fluid is air) is equal to [[pressure]] times [[volumetric flow rate]]. This could be more a more useful figure than the electrical power drawn by the vaccuum system's motor, since the efficiency of motor and vaccuum systems varies. |
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==References== |
==References== |
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Revision as of 22:27, 18 August 2008
An airwatt or air watt is a unit of power very close to the watt which is used for various vacuum cleaning systems, such as vacuum cleaners. The airwatt is derived from English units. ASTM International defines the airwatt as 0.117354 * F * S, where F is the rate of air flow in ft3/s and S is the pressure in inches of water. This makes one airwatt equal to 0.9983 watts. [1]
The airwatt is useful measurement of vaccuum power, since the power carried by a fluid flow (in the case of a typical house vaccuum the fluid is air) is equal to pressure times volumetric flow rate. This could be more a more useful figure than the electrical power drawn by the vaccuum system's motor, since the efficiency of motor and vaccuum systems varies.
References
- ^ Russ Rowlett (2001-03-21). "Units: A". How Many? A Dictionary of Units of Measurement. University of North Carolina at Chapel Hill. Retrieved 2008-03-27.
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