Airwatt

Airwatt

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. [cite web |url= 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]

The airwatt is useful measurement of vacuum power, since the power carried by a fluid flow (in the case of a typical house vacuum 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 vacuum system's motor, since the efficiency of motor and vacuum systems varies.

References


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Vacuum cleaner — Cylinder vacuum cleaner for home use. French train vacuum cleaner …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”