System and method for using climate controlled spaces as energy storage units for “receiving” surplus energy and for “supplying” energy when needed

• US 8,583,288 B1
• Filed: 05/28/2011
• Issued: 11/12/2013
• Est. Priority Date: 05/28/2010
• Status: Active Grant

• Current Assignee: Itron, Inc.
• Original Assignee: Comverge Incorporated (Itron, Inc.)
• Inventors: Rossi, John, Miyaji, Wendell
• Primary Examiner(s): Ali, Mohammad
• Assistant Examiner(s): Karim, Ziaul
• Application Number:
  US13/118,414
• Time in Patent Office: 899 Days
• Field of Search: 700/277, 700/276
• US Class Current: 700/277
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05D 23/1917 using digital means
• CPC Class Codes: G05F 1/66 Regulating electric power

Abstract

A method and system for managing an energy supply of a utility provider include calibrating one or more climate controlled spaces for a controller. The calibrating may include calculating a heating/cooling ratio for the one or more climate controlled spaces. After this calibration occurs, the system may determine if an energy supply surplus exists. If an energy supply surplus exists, then the system may start using the one or more climate controlled spaces as energy sinks for expending energy according to the heating/cooling ratio. The system may also determine if an energy supply deficit exists and if an energy supply deficit exists, then the system may start using the one or more climate controlled spaces as energy “sources,” in which a direct load control algorithm is used to reduce energy consumption by the one or more climate controlled spaces.

Claims

1. A method for managing an energy supply of a utility provider, comprising:

calibrating one or more climate controlled spaces for a controller by calculating a heating or cooling ratio for the one or more climate controlled spaces;

determining if an energy supply surplus exists within a utility system;

if an energy supply surplus exists, then start using the one or more climate controlled spaces as energy sinks for expending energy according to the heating/cooling ratio;

determining if an energy supply deficit exists; and

if an energy supply deficit exists, then start using the one or more climate controlled spaces as energy sources in which a direct load control algorithm is used to reduce consumption of energy, wherein the heating or cooling (H or C) ratio is governed by the following equation;

H or C ratio=(t0+t1)/t2

wherein t0 is a time period between when a set point temperature is reached and when a thermostat issues a request to a space conditioning load, t1 is a time period between when the thermostat issues a request to the space conditioning load and when the space conditioning load is allowed to be activated, and t2 is a time period between when the space conditioning load is allowed to be activated and when the space conditioning load is stopped once it reaches a set point temperature of the thermostat.

2. The method of claim 1, wherein the one or more climate controlled spaces comprises at least one of a room, a plurality of rooms, a single building, and a plurality of buildings.

3. The method of claim 1, further comprising holding a space conditioning load in an off-state for a predetermined period of time in order to calculate the heating or cooling ratio of the one or more climate controlled spaces.

4. The method of claim 3, wherein the space conditioning load comprises at least one of an air conditioner, a compressor, a heat pump, a fan, and a furnace.

5. The method of claim 1, further comprising sampling a population of climate controlled spaces to determine an average heating or cooling ratio and using that average heating or cooling ratio for the population.

6. The method of claim 1, further comprising determining the heating or cooling ratio using at least one of a thermostat and a switch.

7. The method of claim 1, further comprising storing the heating or cooling ratio locally at customer premise equipment.

8. The method of claim 1, further comprising receiving the heating or cooling ratio from across a communications network and modifying the heating or cooling ratio with a central controller.

9. The method of claim 1, further comprising storing the heating or cooling ratio locally in memory.

10. A system for managing energy of a utility provider, comprising:

means for calibrating one or more climate controlled spaces for a controller by calculating a heating or cooling ratio for the one or more climate controlled spaces;

means for determining if an energy surplus exists within a utility system;

means for using the one or more climate controlled spaces as energy sinks for expending energy according to the heating or cooling ratio if an energy surplus exists;

means for determining if an energy deficit exists; and

means for using the one or more climate controlled spaces as energy sources in which a direct load control algorithm is used to reduce consumption of energy if an energy deficit exists, wherein the heating or cooling (H or C) ratio is governed by the following equation;

H or C ratio=(t0+t1)/t2

wherein t0 is a time period between when a set point temperature is reached and when a thermostat issues a request to a space conditioning load, t1 is a time period between when the thermostat issues a request to the space conditioning load and when the space conditioning load is allowed to be activated, and t2 is a time period between when the space conditioning load is allowed to be activated and when the space conditioning load is stopped once it reaches a set point temperature of the thermostat.

11. The system of claim 10, wherein the one or more climate controlled spaces comprises at least one of a room, a plurality of rooms, a single building, and a plurality of buildings.

12. The system of claim 10, further comprising means for holding a space conditioning load in a off-state for a predetermined period of time in order to calculate the heating or cooling ratio of the one or more climate controlled spaces.

13. The system of claim 12, wherein the space conditioning load comprises at least one of an air conditioner, a compressor, a heat pump, a fan, and a furnace.

14. The system of claim 10, further comprising allowing an energy deficit to build up in the one or more climate controlled spaces in accordance with the heating or cooling ratio.

15. A system for managing an energy supply for a utility provider comprising:

a central controller comprising a central load control module, the central load control module operable for;

calibrating one or more climate controlled spaces by calculating a heating or cooling ratio for the one or more climate controlled spaces;

determining if an energy supply surplus exists within the system;

if an energy supply surplus exists, then start using the one or more climate controlled spaces as energy sinks for expending energy according to the heating or cooling ratio;

a communications network coupled to the central controller;

customer premise equipment coupled to the communications network; and

a space conditioning load coupled to the customer premise equipment and to the one or more climate controlled spaces, wherein the heating or cooling (H or C) ratio is governed by the following equation;

H or C ratio=(t0+t1)/t2

wherein t0 is a time period between when a set point temperature is reached and when a thermostat issues a request to a space conditioning load, t1 is a time period between when the thermostat issues a request to the space conditioning load and when the space conditioning load is allowed to be activated, and t2 is a time period between when the space conditioning load is allowed to be activated and when the space conditioning load is stopped once it reaches a set point temperature of the thermostat.

16. The system of claim 15, wherein the space conditioning load comprises at least one of an air conditioner, a compressor, a heat pump, a fan, and a furnace.

17. The system of claim 15, wherein the energy supply comprises electrical energy.

18. The system of claim 15, further comprising memory within the customer premise equipment for storing the heating or cooling ratio locally.

19. The system of claim 15, wherein the central load control module receives the heating or cooling ratio from across the communications network, the central load control module modifying the heating or cooling ratio.

20. The system of claim 19, further comprising memory within the customer premise equipment for storing the heating or cooling ratio locally.