From 84aedd9c4482f018bede397be735ad9ffb2310a2 Mon Sep 17 00:00:00 2001
From: mattwc-openeac <matt@wattcarbon.com>
Date: Wed, 17 Jul 2024 13:20:03 -0500
Subject: [PATCH] Create BEM EXISTING BUILDING VERIFICATION METHODOLOGY

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 ...EXISTING BUILDING VERIFICATION METHODOLOGY | 83 +++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 BEM EXISTING BUILDING VERIFICATION METHODOLOGY

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+EXISTING BUILDING VERIFICATION METHODOLOGY FOR WATTCARBON
+
+ENERGY ATTRIBUTE CREDITS (EACS) AND ENERGY ATTRIBUTE TRACKING SYSTEM (WEATS)
+
+INTRODUCTION
+
+AUROS Group developed the following existing building EAC verification methodology to be used in
+
+the WEATS platform for the transaction of operational carbon savings from the decarbonization of
+
+existing buildings. This methodology is intended to be used when buildings do not have metered,
+
+hourly consumption data. Using calibrated, physics-based dynamic whole-building simulation energy
+
+models, authenticated hourly consumption metrics can be simulated and generated.
+
+DEFINED TERMS
+
+Building Energy Model (BEM) is a physics-based software simulation that dynamically (8760) predicts
+
+a building\&#39;s hourly energy use. BEM takes input from a variety of sources, including, but not limited
+
+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
+
+schedules, and local weather. Acceptable BEM software are IES VE, eQuest, and EnergyPlus.
+
+Baseline BEM (BEM baseline ) is a representative BEM of the existing building using a Time Period of
+
+carbon emissions prior to decarbonization mitigation. The BEM is calibrated as defined in Model
+
+Calibration within the limits of ASHRAE Guidelines 14-2023 using meteorological hourly weather data
+
+for the same Time Period.
+
+Betterment BEM (BEM betterment ) is a representative BEM of the existing building using a Time Period of
+
+carbon emissions after decarbonization mitigation. The BEM is calibrated as defined in Model
+
+Calibration within the limits of ASHRAE Guidelines 14-2023 using meteorological hourly weather data
+
+for the same Time Period.
+
+Model Calibration according to ASHRAE guideline 14-2023 Section 4.3.2.4 Whole-Building Calibrated
+
+Simulation Performance Path requires minimum acceptable model calibration of a normalized mean
+
+bias error (NMBE) of 5% and a coefficient of variation of the root-mean-square error of (CV\[RMSE]) of
+
+15% relative to monthly calibration data.
+
+Time Period is any consecutive 12-month period of time where acceptable utility consumption data is
+
+available for all forms of energy used within the building.
+
+Source Data represents meteorological hourly weather data used in the BEM and consumption data
+
+for all forms of energy from monthly utility consumption data, metered, hourly consumption data, or
+
+another data source, approved by WattCarbon, that represents actual building performance for the
+
+representative Time Period.
+
+VERIFICATION METHODOLOGY FOR BUILDING DECARBONIZATION
+
+When metered, hourly consumption data is not available for existing buildings, calibrated physics-
+
+based dynamics whole-building simulation energy BEM models can be used to generate
+
+authenticated hourly consumption data for transactional purposes.
+
+The intent of using BEM models is to simulate and generate authenticated EAC (EAC a ) hourly
+
+consumption data for the WEATS platform for all buildings that do not have metered, hourly
+
+consumption data. This verification methodology reliably converts monthly utility data to transactable,
+
+authenticated hourly consumption data using proven building science technology.
+
+The mathematical methodology for the hourly time series data is as follows:
+
+BEM baseline – BEM betterment = EAC a