Heat pump and air conditioning grading systems and methods
View Patent ↗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.
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.