Method and controller for determining carbon dioxide emissions from a recirculating air heater
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United States of America Patent
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Sep 12, 2006
Grant Date -
Jun 8, 2006
app pub date -
Jul 30, 2004
filing date -
Jul 31, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of determining the amount of air flowing through an outside air damper of a recirculating air heater includes the steps of sensing an amount of airflow flowing through the damper, recording the amount of airflow and a damper position value at a plurality of damper positions, and interpolating a curve relating the amount of airflow to the damper position for all damper positions between a minimum damper position and a maximum damper position. Once the amount of air flowing through the outside air damper is determined from a position on the curve, the concentration of carbon dioxide (CO.sub.2) within a building space can be calculated and/or determined to be within acceptable limits.
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