Air flow control system and method for a dual duct system

Details Air flow control system and method for a dual duct system Air flow control system and method for a dual duct system

1993-07-23

1994-09-27

Tapoical, William E.

Automatic temperature and humidity regulation

Mixing fluid of dissimilar temperature

Plenum type

236 493, F24F 1304

Patent

active

053501136

ABSTRACT:
A dual-duct HVAC system for providing a desired comfort level in a room, includes a controller that carries out a simple operation that determines the total open damper positions for dual dampers in a dual duct system to effect a desired air flow. Using the total open damper position information as damper control information, the controller also determines a relative damper position difference required between the two dampers to effect a desired temperature level while also meeting the air flow requirement as determined from the total open damper position information. The combination of the total open damper position information and the relative damper position difference is used as control information to control both dampers. Preferably, the controller gives priority of air flow control over temperature control by determining a valid damper position difference range for use in conjunction with the total open damper position information.

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1991 Ashrae Handbook, "Heating, Ventilating, and Air-Conditioning Applications," American Society of Heating and Air-Conditioning Engineers, Inc., Atlanta, Georgia, pp. 41.25-41.27.

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