Methods and apparatus for indoor air contaminant monitoring
First Claim
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1. A method for controlling indoor air quality levels, comprising:
- using an air contaminant sensor to obtain air contaminant levels, wherein the air contaminant sensor is part of a multipoint air monitoring system;
using an infinite geometric series approximation having terms that include an air contaminant level generated by at least one source in a room, a return air fraction at an air handler unit, and filtration porousness, to compute a true indoor air contaminant level in the room; and
adjusting dampers in an air handling unit to control a mixture of outside air in supply air using the true indoor contaminant level and/or adjusting an amount of supply air volume into the room using the true indoor contaminant level.
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Abstract
Methods and apparatus for determining indoor air contaminant levels independent of outdoor contaminant levels. In one embodiment, an infinite geometric series is used to compute a true indoor air contaminant level in a room.
39 Citations
18 Claims
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1. A method for controlling indoor air quality levels, comprising:
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using an air contaminant sensor to obtain air contaminant levels, wherein the air contaminant sensor is part of a multipoint air monitoring system; using an infinite geometric series approximation having terms that include an air contaminant level generated by at least one source in a room, a return air fraction at an air handler unit, and filtration porousness, to compute a true indoor air contaminant level in the room; and adjusting dampers in an air handling unit to control a mixture of outside air in supply air using the true indoor contaminant level and/or adjusting an amount of supply air volume into the room using the true indoor contaminant level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for determining indoor air contaminant levels independent of outdoor contaminant levels, comprising:
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an air contaminant monitoring system comprising; a first air contaminant sensor for collecting air contaminant levels from at least one partially enclosed area that is served by at least one return air handling unit that mixes at least a portion of building air returned to the air handler air into supply air; memory and at least one processor configured to; determine an indoor air contaminant level independent of outdoor contaminant levels by; using an infinite geometric series approximation having terms that include an air contaminant level generated by at least one source in a room, a return air fraction at the air handler, and filtration porousness, to compute a true indoor air contaminant level in the room, and adjust dampers in an air handling unit to control a mixture of outside air in supply air using the true indoor contaminant level and/or adjusting an amount of supply air volume into the room using the true indoor contaminant level. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A system, comprising:
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an air handler unit; and a means for determining indoor air contaminant levels independent of outdoor contaminant levels coupled to the air handler, wherein the means for determining indoor air contaminant levels independent of outdoor contaminant levels includes using an infinite geometric series approximation having terms that include an air contaminant level generated by at least one source in a room, a return air fraction at the air handler unit, and filtration porousness if a filter is present, to compute a true indoor air contaminant level in the room.
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Specification