Gas flow rate determination method and apparatus and granular material dryer and method for control thereof
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United States of America Patent
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Mar 27, 2012
Grant Date -
Feb 17, 2011
app pub date -
Aug 13, 2009
filing date -
Aug 13, 2009
priority date (Note) -
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Abstract
Methods and apparatus for determining flow rate of air or other gas through a conduit independently of conduit cross sectional area include providing apparatus for and measuring temperature of the air or other gas at a first position along the conduit; providing apparatus for and heating the air or other gas in the conduit of the location downstream from the first position by application of a known power level to the air or other gas in the conduit; providing apparatus for and measuring air or other gas temperature at a second position downstream of the heating position along the conduit; providing apparatus for and subtracting air or other gas temperature at the second position from air or other gas temperature at the first position to obtain a temperature difference and thereafter providing apparatus for and dividing power applied to heat the air or other gas by the product of the temperature difference and the specific heat of the air or other gas.
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