Systems and methods for measuring and verifying energy savings in buildings
First Claim
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1. A computer system for use with a building management system in a building, comprising:
- a processing circuit configured to use historical data received from the building management system to automatically select a set of variables estimated to be significant to energy usage in the building;
wherein the processing circuit is further configured to apply a regression analysis to the selected set of variables to generate a baseline model for predicting energy usage in the building;
wherein the processing circuit is configured to calculate enthalpy and to use the calculated enthalpy to calculate heating and cooling energy days; and
wherein the processing circuit uses the calculated heating and cooling energy days in the regression analysis rather than degree days.
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Abstract
A computer system for use with a building management system in a building includes a processing circuit configured to use historical data received from the building management system to automatically select a set of variables estimated to be significant to energy usage in the building. The processing circuit is further configured to apply a regression analysis to the selected set of variables to generate a baseline model for predicting energy usage in the building.
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12 Claims
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1. A computer system for use with a building management system in a building, comprising:
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a processing circuit configured to use historical data received from the building management system to automatically select a set of variables estimated to be significant to energy usage in the building; wherein the processing circuit is further configured to apply a regression analysis to the selected set of variables to generate a baseline model for predicting energy usage in the building; wherein the processing circuit is configured to calculate enthalpy and to use the calculated enthalpy to calculate heating and cooling energy days; and wherein the processing circuit uses the calculated heating and cooling energy days in the regression analysis rather than degree days. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9)
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8. A computer system for use with a building management system in a building, comprising:
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a processing circuit configured to use historical data received from the building management system to automatically select a set of variables estimated to be significant to energy usage in the building; wherein the processing circuit is further configured to apply a regression analysis to the selected set of variables to generate a baseline model for predicting energy usage in the building; wherein the processing circuit is configured to automatically identify non-representative data from the historical data and to remove or replace the non-representative data to improve integrity of automatically selecting the set of variables and the regression analysis; wherein the processing circuit excludes a variable from the selected set of variables in response to a determination that there is insufficient data for the variable; wherein the processing circuit identifies the non-representative data by conducting at least one of an outlier analysis, a data cluster analysis, stuck data analysis, and a missing data analysis.
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10. A computer system for use with a building management system in a building, comprising:
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a processing circuit configured to use historical data received from the building management system to automatically select a set of variables estimated to be significant to energy usage in the building; wherein the processing circuit is further configured to apply a regression analysis to the selected set of variables to generate a baseline model for predicting energy usage in the building; wherein the processing circuit determines which of energy days and degree days to use in the regression analysis by; calculating an enthalpy balance point estimated to minimize energy usage in the building; and calculating a temperature balance point estimated to minimize energy usage in the building. - View Dependent Claims (11, 12)
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Specification