Arrangement and method for automatically determined time constant for a control device
AssigneeGeneral Cybernation Group Inc.
InventorsGeorge Cheng, Osman Ahmed, William Pienta
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Abstract
An arrangement for use in connection with an air handling unit includes a controller and a processing circuit. The controller is configured to control a device within an air handler unit, which includes at least a first coil. The processing circuit is configured to receive first information representative of a maximum liquid flow rate through the first coil and second information representative of a maximum air flow rate of the first coil. The processing circuit is further configured to generate a time constant estimate, based on the first information and second information, for use in the controller in performing control of the device.
Claims28
An arrangement comprising:
- a) a controller configured to control a device within air handler unit, the air handler unit including at least a first coil;
- b) a processing circuit configured to receive first information representative of a maximum liquid flow rate through the first coil and second information representative of a maximum air flow rate of the first coil, the processing circuit further configured to generate a time constant estimate, based on the first information and second information, for use in the controller in performing control of the device.
A method comprising:
- a) determining a sequence of elements between a first device and a supply air temperature sensor of an air handling unit;
- b) obtaining an estimate for time constants associated with each element of the sequence;
- c) adding the time constants to obtain a process time constant estimate;
- and
- d) controlling a device based at least in part on the process time constant estimate.
A method comprising:
- a) obtaining an estimate for a supply air process time constant based at least in part on physical specifications of devices disposed in a supply air path;
- and
- b) controlling at least one element of an air handling unit based at least in part on the process time constant estimate.
Dependencies are inferred from the claim text.