IP Library › Granted Patent US 12,216,452
Granted Patent B2
US 12,216,452 · App. 18/468,118 · Granted Feb 4, 2025

High level central plant optimization

Inventors: Michael J. Wenzel (Oak Creek, WI); Robert D. Turney (Watertown, WI); Kirk H. Drees (Cedarburg, WI); Matthew J. Asmus (Watertown, WI)
Assignee: Johnson Controls Technology Company
G05B19/418G05B13/048G05B15/02G06N20/00G06Q10/04G06Q10/06G06Q50/06G05B2219/2639G05B2219/2642G05B2219/31414G05B2219/32021Y02P70/10Y02P80/10
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Quick Facts
Patent No.
US 12,216,452
App. No.
18/468,118
Filed
Sep 15, 2023
Granted
Feb 4, 2025
Kind
B2
Art Unit
2119
USPC
700/291
Abstract

A controller for equipment that operate to provide heating or cooling to a building or campus includes a processing circuit configured to obtain utility rate data indicating a price of resources consumed by the equipment to serve energy loads of the building or campus, obtain an objective function that expresses a total monetary cost of operating the equipment over an optimization period as a function of the utility rate data and an amount of the resources consumed by the equipment, determine a relationship between resource consumption and load production of the equipment, optimize the objective function over the optimization subject to a constraint based on the relationship between the resource consumption and the load production of the equipment to determine a distribution of the load production across the equipment, and operate the equipment to achieve the distribution.

Claims (39)

1. A controller for equipment that operate to provide heating or cooling to a building or campus, the controller comprising:

a processing circuit configured to:

obtain an objective function that expresses a control objective as a function of an amount of one or more input resources consumed by the equipment at each of a plurality of time steps of an optimization period;

determine a relationship between (i) the amount of the one or more input resources consumed by the equipment and (ii) an amount of one or more output resources produced by the equipment as a result of consuming the one or more input resources;

optimize the objective function over the optimization period, and subject to a constraint based on the relationship, to determine a distribution of production of the one or more output resources across the equipment at each of the plurality of time steps; and

operate the equipment to achieve the distribution at each of the plurality of time steps.

2. The controller of claim 1 , wherein the processing circuit is configured to predict a demand for the one or more output resources using at least one of input from sensors within the building or campus or weather data for a location of the building or campus.

3. The controller of claim 1 , wherein the equipment comprise a plurality of subplants of a central plant and operate to provide the heating or cooling to the building or campus by heating or cooling a working fluid that is circulated to air handlers of the building or campus, wherein the one or more output resources comprise at least one of a cooled working fluid or a heated working fluid.

4. The controller of claim 1 , wherein the equipment comprise at least one of air handlers, dampers, or fans of the building or campus and operate to provide the heating or cooling to the building or campus by delivering heated or cooled air to one or more zones of the building or campus, wherein the one or more output resources comprise at least one of the heated air or the cooled air.

5. The controller of claim 1 , wherein:

the relationship defines the amount of the one or more output resources produced by the equipment as a function of the amount of the one or more input resources consumed by the equipment; and

the processing circuit is configured to use the relationship to predict the amount of the one or more resources consumed by the equipment to produce a corresponding amount of the one or more output resources.

6. The controller of claim 1 , wherein the processing circuit is configured to determine or update the relationship using experimental data obtained by operating the equipment.

7. The controller of claim 1 , wherein the objective function comprises cost variables representing a monetary cost associated with each of the one or more input resources consumed by the equipment at each of the plurality of time steps.

8. A controller for equipment that operate to provide heating or cooling to a building or campus, the controller comprising:

a processing circuit configured to:

obtain an objective function that expresses a control objective as a function of an amount of one or more input resources consumed by the equipment at each of a plurality of time steps of an optimization period;

determine a relationship between (i) the amount of the one or more input resources consumed by the equipment and (ii) production variables representing amounts of one or more output resources produced by the equipment as a result of consuming the one or more input resources, wherein the production variables are based on the amount of the one or more input resources consumed by the equipment at each of the plurality of time steps;

optimize the objective function over the optimization period to determine a distribution of production of the one or more output resources across the equipment at each of the plurality of time steps, wherein determining the distribution comprises determining values for the production variables; and

operate the equipment to achieve the distribution at each of the plurality of time steps.

9. The controller of claim 8 , wherein the processing circuit is configured to predict a demand for the one or more output resources using at least one of input from sensors within the building or campus or weather data for a location of the building or campus.

10. The controller of claim 8 , wherein the equipment comprise a plurality of subplants of a central plant and operate to provide the heating or cooling to the building or campus by heating or cooling a working fluid that is circulated to air handlers of the building or campus.

11. The controller of claim 8 , wherein the equipment comprise at least one of air handlers, dampers, or fans of the building or campus and operate to provide the heating or cooling to the building or campus by delivering heated or cooled air to one or more zones of the building or campus.

12. The controller of claim 8 , wherein the processing circuit is configured to optimize the objective function over the optimization period subject to a constraint based on the relationship.

13. A method for operating equipment to provide heating or cooling to a building or campus, the method comprising:

obtaining an objective function that expresses a control objective as a function of an amount of one or more input resources consumed by the equipment at each of a plurality of time steps of an optimization period;

determining a relationship between (i) the amount of the one or more input resources consumed by the equipment and (ii) an amount of one or more output resources produced by the equipment as a result of consuming the one or more input resources;

optimizing the objective function over the optimization period, and subject to a constraint based on the relationship, to determine a distribution of production of the one or more output resources across the equipment at each of the plurality of time steps; and

operating the equipment to achieve the distribution at each of the plurality of time steps.

14. The method of claim 13 , comprising predicting a demand for the one or more output resources using at least one of input from sensors within the building or campus or weather data for a location of the building or campus.

15. The method of claim 13 , wherein the equipment comprise a plurality of subplants of a central plant and operate to provide the heating or cooling to the building or campus by heating or cooling a working fluid that is circulated to air handlers of the building or campus.

16. The method of claim 13 , wherein the equipment comprise at least one of air handlers, dampers, or fans of the building or campus and operate to provide the heating or cooling to the building or campus by delivering heated or cooled air to one or more zones of the building or campus.

17. The method of claim 13 , wherein the relationship defines the amount of the one or more output resources produced by the equipment as a function of the amount of the one or more input resources consumed by the equipment; and

the method comprises using the relationship to predict the amount of the one or more resources consumed by the equipment to produce a corresponding amount of the one or more output resources.

18. The method of claim 13 , comprising determining or updating the relationship using experimental data obtained by operating the equipment.

19. The method of claim 13 , wherein the objective function comprises:

cost variables representing a monetary cost associated with each of the one or more input resources consumed by the equipment at each of the plurality of time steps; and

consumption variables representing the amount of the one or more input resources consumed by the equipment at each of the plurality of time steps.

20. The method of claim 13 , comprising performing the optimization subject to a constraint that requires the amount of the one or more output resources produced by the equipment to satisfy a demand of the building or campus for the one or more output resources.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 15, 2023
From: WENZEL, MICHAEL J.; TURNEY, ROBERT D.; DREES, KIRK H.; ASMUS, MATTHEW J.
To: JOHNSON CONTROLS TECHNOLOGY COMPANY
Reel/Frame 064921/0612 →
Continuity (5)
Continuation 17148123 · Jan 13, 2021
Continuation 16214984 · Dec 10, 2018
Continuation 14634609 · Feb 27, 2015
Provisional Application 61987361 · May 1, 2014
Related Publication 20240061404A1 · Feb 22, 2024
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