Sensor-free optimal control of air-side economizer
First Claim
Patent Images
1. A method for operating a system which regulates an amount of outdoor air that is introduced into a building and operates a mechanical temperature control device that varies temperature in the building, the method comprising:
- initiating a heating with minimum outdoor air state;
monitoring a heating control signal, a cooling control signal and a damper control signal;
performing a state comparison of the heating control signal, the cooling control signal and the damper control signal to a predetermined range of values; and
transitioning into a second state based on the comparison.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods to regulate the amount of outdoor air that is introduced into a building. These systems and methods use the cooling coil control signal which is a function of the load on the cooling coil. These systems and methods utilize extremum seeking control logic to vary the flow of outdoor air into the building in response to these load determinations.
-
Citations
24 Claims
-
1. A method for operating a system which regulates an amount of outdoor air that is introduced into a building and operates a mechanical temperature control device that varies temperature in the building, the method comprising:
-
initiating a heating with minimum outdoor air state; monitoring a heating control signal, a cooling control signal and a damper control signal; performing a state comparison of the heating control signal, the cooling control signal and the damper control signal to a predetermined range of values; and transitioning into a second state based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for operating a system which regulates an amount of outdoor air that is introduced into a building and operates a mechanical temperature control device that varies temperature in the building, the method comprising:
-
initiating a heating with minimum outdoor air state; monitoring a heating control signal, a cooling control signal and a damper control signal; performing a state comparison of the heating control signal, the cooling control signal and the damper control signal to a predetermined range of values; transitioning into a second state based on the comparison; and wherein the predetermined range of values includes;
(i) the heating control signal is at a heating minimum value for five minutes or the cooling control signal is at a cooling minimum value for five minutes to transition to a free cooling state;
(ii) the damper control signal at a damper minimum value for five minutes to transition to the heating with minimum outdoor air state; and
(iii) the damper control signal at a damper maximum value for five minutes to transition to a mechanical cooling with self-optimizing control state. - View Dependent Claims (12, 13, 14, 15, 16, 18, 19, 20)
-
-
17. A method for operating a system which regulates an amount of outdoor air that is introduced into a building and operates a mechanical temperature control device that varies temperature in the building, the method comprising:
-
initiating a heating with minimum outdoor air state; monitoring a heating control signal, a cooling control signal and a damper control signal; performing a state comparison of the heating control signal, the cooling control signal and the damper control signal to a predetermined range of values; transitioning into a second state based on the comparison; and wherein the predetermined range of values includes;
(i) the heating control signal is at a heating minimum value for a first predetermined interval or the cooling control signal is at a cooling minimum value for second predetermined interval to transition to a free cooling state;
(ii) the damper control signal at a damper minimum value for a third predetermined interval to transition to the heating with minimum outdoor air state; and
(iii) the damper control signal at a damper maximum value for a fourth predetermined interval to transition to a mechanical cooling with self-optimizing control state.
-
-
21. A space conditioning device comprising:
-
an air-handling unit; a means for cooling an air coupled to the air-handling unit; a means for heating the air coupled to the air-handling unit; a means for controlling the space conditioning device; at least one means for controlling a flow of the air coupled to the means for controlling the space conditioning device and the air-handling unit; wherein the means for controlling the space conditioning device in a start up stage initiates a heating with minimum outdoor air state; and wherein the means for controlling the space conditioning device is configured to control the at least one means for controlling the flow of the air utilizing extremum logic. - View Dependent Claims (22, 23, 24)
-
Specification