Heat pump and air conditioning grading systems and methods

• US 10,344,997 B2
• Filed: 05/06/2015
• Issued: 07/09/2019
• Est. Priority Date: 05/07/2014
• Status: Active Grant

• Current Assignee: Copeland Corporation LLC (Emerson Electric Company)
• Original Assignee: Emerson Climate Technologies Incorporated (Emerson Electric Company)
• Inventors: Alsaleem, Fadi Mohammad
• Primary Examiner(s): Satanovsky, Alexander
• Assistant Examiner(s): Crohn, Mark I
• Application Number:
  US14/705,340
• Publication Number:
  US 20150323423A1
• Time in Patent Office: 1,525 Days
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/32 Responding to malfunctions or emergencies
• CPC Class Codes: F24F 11/38 Failure diagnosis
• CPC Class Codes: F24F 11/52 Indication arrangements, e.g. displays
• CPC Class Codes: F24F 11/64 using pre-stored data
• CPC Class Codes: F24F 2110/00 Control inputs relating to air properties
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 2130/00 Control inputs relating to environmental factors not covered by group F24F2110/00
• CPC Class Codes: F24F 2130/10 Weather information or forecasts
• CPC Class Codes: F24F 2140/50 Load
• CPC Class Codes: F24F 2140/60 Energy consumption
• CPC Class Codes: F24F 3/044 Systems in which all treatment is given in the central station, i.e. all-air systems
• CPC Class Codes: G01K 13/00 Thermometers specially adapted for specific purposes
• CPC Class Codes: G01K 17/08 based upon measurement of temperature difference or of a temperature
• CPC Class Codes: G01M 99/005 Testing of complete machines, e.g. washing-machines or mobile phones testing of machine parts G01M13/00; testing of electric apparatus or components G01R31/50
• CPC Class Codes: G01R 21/00 Arrangements for measuring electric power or power factor G01R7/12 takes precedence

Abstract

An expectation module determines an expected average power consumption of a heat pump for a predetermined period as a function of indoor and outdoor temperatures of the building during the predetermined period. A difference module determines a power difference between an average power consumption of the heat pump during the predetermined period and the expected average power consumption of the heat pump for the predetermined period. A grade determination module determines a grade of the heat pump for the predetermined period based on the power difference of the predetermined period. A reporting module generates a displayable report including the grade of the heat pump for the predetermined period.

Claims

1. A grading system, comprising:

one or more processors;

memory including instructions that, when executed by the one or more processors, cause the one or more processors to;

receive, from sensors of a building over a network, indoor temperatures of the building during a predetermined period, outdoor temperatures at the building during the predetermined period, and power consumptions of a heat pump of the building during the predetermined period,

determine an expected average power consumption of the heat pump of the building for the predetermined period as a function of the indoor and outdoor temperatures of the building during the predetermined period;

determine a power difference between an average power consumption of the heat pump during the predetermined period and the expected average power consumption of the heat pump for the predetermined period;

determine an initial grade of the heat pump for the predetermined period based on the power difference of the predetermined period;

determine a final grade of the heat pump for the predetermined period based on a comparison of a temperature range for the predetermined period with an average of temperature differences between return air temperatures of the predetermined period and supply air temperatures of the predetermined period, respectively, the determination of the final grade including;

when the average of the temperature differences is less than a lower limit of the temperature range, setting the final grade based on;

Initial Grade−

Gain_Low*(Lower Limit−

TS),

where Initial Grade is the initial grade, Gain_Low is a predetermined lower gain value, Lower Limit is the lower limit of the temperature range, and TS is the average of the temperature differences; and

when the average of the temperature differences is greater than an upper temperature limit of the temperature range, setting the final grade based on;

Initial Grade−

Gain_High*(Upper Limit−

TS),

where Initial Grade is the initial grade, Gain_High is a predetermined upper gain value that is greater than the predetermined lower gain value, Upper Limit is the upper limit of the temperature range, and TS is the average of the temperature differences;

generate a displayable report including the final grade of the heat pump for the predetermined period;

transmit the displayable report to a user computing device associated with the building; and

control the heat pump of the building.

2. The grading system of claim 1 wherein the instructions include instructions that, when executed by the one or more processors, cause the one or more processors to determine the expected average power consumption of the heat pump for the predetermined period using a mapping that relates indoor and outdoor temperatures to expected average power consumption of the heat pump.

3. The grading system of claim 1 wherein the instructions include instructions that, when executed by the one or more processors, cause the one or more processors to determine the expected average power consumption of the heat pump for the predetermined period as a function of:

(i) an average of a plurality of indoor air temperatures measured during the predetermined period; and

(ii) an average of a plurality of outdoor air temperatures measured during the predetermined period.

4. The grading system of claim 1 wherein the instructions include instructions that, when executed by the one or more processors, cause the one or more processors to set the initial grade of the heat pump for the predetermined period based on 100 minus an absolute value of the power difference of the predetermined period.

5. The grading system of claim 1 wherein the instructions further include instructions that, when executed by the one or more processors, cause the one or more processors to determine an adjusted power difference for the predetermined period based on the power difference of the predetermined period,

wherein the instructions include instructions that, when executed by the one or more processors, cause the one or more processors to determine the initial grade of the heat pump for the predetermined period based on the adjusted power difference of the predetermined period.

6. The grading system of claim 5 wherein the instructions include instructions that, when executed by the one or more processors, cause the one or more processors to:

when the average power consumption of the heat pump during the predetermined period is greater than the expected average power consumption of the heat pump for the predetermined period, determine the adjusted power difference based on a product of a first predetermined gain and the power difference of the predetermined period; and

,

when the average power consumption of the heat pump during the predetermined period is less than the expected average power consumption of the heat pump for the predetermined period, determine the adjusted power difference based on a product of a second predetermined gain and the power difference of the predetermined period.

7. The grading system of claim 6 wherein the first predetermined gain is one of greater than and less than the second predetermined gain.

8. The grading system of claim 1 wherein the instructions further include instructions that, when executed by the one or more processors, cause the one or more processors to set the temperature range for the predetermined period based on the outdoor temperature of the building during the predetermined period.

9. The grading system of claim 1 wherein the instructions further include instructions that, when executed by the one or more processors, cause the one or more processors to increase the predetermined upper gain value when the average power consumption of the heat pump during the predetermined period is greater than the expected average power consumption of the heat pump for the predetermined period.

10. The grading system of claim 1 wherein the instructions further include instructions that, when executed by the one or more processors, cause the one or more processors to double the predetermined upper gain value when the average power consumption of the heat pump during the predetermined period is greater than the expected average power consumption of the heat pump for the predetermined period.

11. The grading system of claim 1 wherein the instructions further include instructions that, when executed by the one or more processors, cause the one or more processors to increase the predetermined lower gain value when the average power consumption of the heat pump during the predetermined period is less than the expected average power consumption of the heat pump for the predetermined period.

12. The grading system of claim 1 wherein the instructions further include instructions that, when executed by the one or more processors, cause the one or more processors to double the predetermined lower gain value when the average power consumption of the heat pump during the predetermined period is less than the expected average power consumption of the heat pump for the predetermined period.

13. A grading method, comprising:

by one or more processors, receiving, from sensors of a building over a network, indoor temperatures of the building during a predetermined period, outdoor temperatures at the building during the predetermined period, and power consumptions of a heat pump of the building during the predetermined period;

by the one or more processors, determining an expected average power consumption of the heat pump of the building for the predetermined period as a function of the indoor and outdoor temperatures of the building during the predetermined period;

by the one or more processors, determining a power difference between an average power consumption of the heat pump during the predetermined period and the expected average power consumption of the heat pump for the predetermined period;

by the one or more processors, determining an initial grade of the heat pump for the predetermined period based on the power difference of the predetermined period;

by the one or more processors, determining a final grade of the heat pump for the predetermined period based on a comparison of a temperature range for the predetermined period with an average of temperature differences between return air temperatures of the predetermined period and supply air temperatures of the predetermined period, respectively, the determining the final grade including;

when the average of the temperature differences is less than a lower limit of the temperature range, setting the final grade based on;

Initial Grade−

Gain_Low*(Lower Limit−

TS),

where Initial Grade is the initial grade, Gain_Low is a predetermined lower gain value, Lower Limit is the lower limit of the temperature range, and TS is the average of the temperature differences; and

when the average of the temperature differences is greater than an upper temperature limit of the temperature range, setting the final grade based on;

Initial Grade−

Gain_High*(Upper Limit−

TS),

where Initial Grade is the initial grade, Gain_High is a predetermined upper gain value that is greater than the predetermined lower gain value, Upper Limit is the upper limit of the temperature range, and TS is the average of the temperature differences;

by the one or more processors, generating a report including the final grade of the heat pump for the predetermined period;

by the one or more processors, transmitting the report to a user computing device associated with the building; and

by the one or more processors, controlling the heat pump of the building.

14. The grading method of claim 13 wherein determining the expected average power consumption includes determining the expected average power consumption of the heat pump for the predetermined period using a mapping that relates indoor and outdoor temperatures to expected average power consumption of the heat pump.

15. The grading method of claim 13 wherein determining the expected average power consumption includes determining the expected average power consumption of the heat pump for the predetermined period as a function of:

(i) an average of a plurality of indoor air temperatures measured during the predetermined period; and

(ii) an average of a plurality of outdoor air temperatures measured during the predetermined period.

16. The grading method of claim 13 wherein determining the initial grade includes setting the initial grade of the heat pump for the predetermined period based on 100 minus an absolute value of the power difference of the predetermined period.

17. The grading method of claim 13 further comprising:

determining an adjusted power difference for the predetermined period based on the power difference of the predetermined period,

wherein determining the initial grade includes determining the initial grade of the heat pump for the predetermined period based on the adjusted power difference of the predetermined period.

18. The grading method of claim 17 wherein determining the initial grade includes:

when the average power consumption of the heat pump during the predetermined period is greater than the expected average power consumption of the heat pump for the predetermined period, determining the adjusted power difference based on a product of a first predetermined gain and the power difference of the predetermined period; and

,

when the average power consumption of the heat pump during the predetermined period is less than the expected average power consumption of the heat pump for the predetermined period, determining the adjusted power difference based on a product of a second predetermined gain and the power difference of the predetermined period.

19. The grading method of claim 18 wherein the first predetermined gain is one of greater than and less than the second predetermined gain.

20. The grading method of claim 13 further comprising setting the temperature range for the predetermined period based on the outdoor temperature of the building during the predetermined period.

21. The grading method of claim 13 further comprising increasing the predetermined upper gain value when the average power consumption of the heat pump during the predetermined period is greater than the expected average power consumption of the heat pump for the predetermined period.

22. The grading method of claim 13 further comprising doubling the predetermined upper gain value when the average power consumption of the heat pump during the predetermined period is greater than the expected average power consumption of the heat pump for the predetermined period.

23. The grading method of claim 13 further comprising increasing the predetermined lower gain value when the average power consumption of the heat pump during the predetermined period is less than the expected average power consumption of the heat pump for the predetermined period.

24. The grading method of claim 13 further comprising doubling the predetermined lower gain value when the average power consumption of the heat pump during the predetermined period is less than the expected average power consumption of the heat pump for the predetermined period.