Create BEM NEW BUILDING VERIFICATION METHODOLOGY

BEM NEW BUILDING VERIFICATION METHODOLOGY

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+NEW BUILDING VERIFICATION METHODOLOGY FOR WATTCARBON
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+ENERGY ATTRIBUTE CREDITS (EACS) AND ENERGY ATTRIBUTE TRACKING SYSTEM (WEATS)
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+INTRODUCTION
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+AUROS Group developed the following new building EAC verification methodology to be used in the
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+WEATS platform for the transaction of operational carbon savings from the decarbonization of new
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+buildings. This methodology is intended to be used when buildings do not have metered, hourly
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+consumption data. Using calibrated, physics-based dynamic whole-building simulation energy
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+models, authenticated hourly consumption metrics can be simulated and generated.
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+**DEFINED TERMS**
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+Building Energy Model (BEM) is a physics-based software simulation that dynamically (8760) predicts
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+a building\'s hourly energy use. BEM takes input from a variety of sources, including, but not limited
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+to, building geometry, construction materials, lighting, HVAC, refrigeration, water heating, and
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+renewable generation systems, component efficiencies, control strategies, building use and operation
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+schedules, and local weather. Acceptable BEM software are IES VE, eQuest, and EnergyPlus.
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+Baseline BEM (BEM baseline ) represents buildings that would have otherwise been designed and
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+constructed to meet the minimum requirements of local building codes using a Time Period of carbon
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+emissions prior to building operations. In that instance, the BEM must comply with ASHRAE
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+Standard 90.1-2010 compliance, which provides the minimum requirements for energy-efficient
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+design of most buildings. The model uses 30-year meteorological hourly weather data.
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+Betterment BEM (BEM betterment ) is a representative BEM of the existing building using a Time Period of
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+carbon emissions after decarbonization mitigation. The BEM is calibrated as defined in Model
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+Calibration within the limits of ASHRAE Guidelines 14-2023 using meteorological hourly weather data
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+for the same Time Period.
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+Model Calibration according to ASHRAE guideline 14-2023 Section 4.3.2.4 Whole-Building Calibrated
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+Simulation Performance Path requires minimum acceptable model calibration of a normalized mean
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+bias error (NMBE) of 5% and a coefficient of variation of the root-mean-square error of (CV\[RMSE]) of
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+15% relative to monthly calibration data.
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+Time Period for new buildings is the consecutive 12-month period of time ending at the completion of
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+construction for the new building. For existing buildings, the Time Period is any consecutive 12-month
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+period of time where acceptable utility consumption data is available for all forms of energy used
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+within the building.
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+Source Data represents meteorological hourly weather data used in the BEM and consumption data
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+for all forms of energy from monthly utility consumption data, metered, hourly consumption data, or
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+another data source, approved by WattCarbon, that represents actual building performance for the
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+representative Time Period.
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+**VERIFICATION METHODOLOGY FOR BUILDING DECARBONIZATION**
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+When metered, hourly consumption data is not available for new buildings, calibrated physics-based
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+dynamics whole-building simulation energy BEM models can be used to generate authenticated
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+hourly consumption data for transactional purposes.
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+The intent of using BEM models is to simulate and generate authenticated EAC (EAC a ) hourly
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+consumption data for the WEATS platform for all buildings that do not have metered, hourly
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+consumption data. This verification methodology reliably converts monthly utility data to transactable,
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+authenticated hourly consumption data using proven building science technology.
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+The mathematical methodology for the hourly time series data is as follows:
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+BEM baseline – BEM betterment = EAC a