Commercial Building Energy Saver No session number 8283 users

Overview

Commercial Building Energy Saver (CBES), intended use for small and medium office and retail buildings in California, provides energy benchmarking and three levels of retrofit analysis considering the project goal, data availability, and user experience. CBES offers prototype building models for seven building types, six vintages, in 16 California climate zones and roughly 100 energy conservation measures (ECMs) for lighting, envelope, equipment, HVAC, and service hot water retrofit upgrades. CBES Preliminary Retrofit Analysis utilizes the DEEP database, a data bank for screening and evaluating retrofit measures for commercial buildings generated from 10 million building energy simulations conducted using EnergyPlus and the U.S. National Energy Research Scientific Computing (NERSC) supercomputer. CBES Detailed Retrofit Analysis employs advanced automated calibration algorithms to attune inputs prior to simulating energy savings of ECMs. For the detailed retrofit analysis, on-demand energy simulations using OpenStudio and EnergyPlus calculates the energy performance of the building with user configurable ECMs. CBES is flexible enough that the user can jump to any level of evaluation, after the common inputs are provided. For those who wish to extend beyond California, a national version can be found at the 2030 whole building retrofit toolkit portal. CBES targets broad audience including building owners, facility managers, energy managers, building operators, energy auditors, designers, engineers and consultants.

Getting Started Tutorial: PDF Video

LBNL seminar Commercial Building Energy Saver: An Energy Retrofit Analysis Toolkit (Recording)


Benchmarking

Benchmark the building using ENERGY STAR Portfolio Manager API and EnergyIQ API

Required inputs: Basic information and Energy Data in Common Inputs tab, and ENERGY STAR Inputs in Benchmark tab

Target audience: For all types of users


No- or Low-Cost Improvement

Level 1 identifies no- or low-cost operational improvements from load shape analysis using electricity and gas data

Required inputs: Basic information and Energy Data in Common Inputs tab, and Weather and Operation information in No- or Low- Cost Improvement tab.

Target audience: For all types of users


Preliminary Retrofit Analysis

Level 2 provides quick retrofit recommendations by looking up a pre-simulated database.

Required inputs: Basic information, Energy price, CO2 emission factors, and Investment criteria in Common Inputs tab, and Upgrades in Preliminary Retrofit Anlaysis tab.

Target audience: For all types of users


Detailed Retrofit Analysis

Level 3 provides user configurable retrofit analysis using real-time EnergyPlus simulations.

Required inputs: Basic information, Energy price, CO2 emission factors, and Investment criteria in Common Inputs tab, and Actual building characteristics, Time of use energy rate, and User defined retrofit measures in Detailed Retrofit Anlaysis tab.

Target audience: Facility managers, engineers, and building owners with experience


Publication

Commercial Building Energy Saver: An Energy Retrofit Analysis Toolkit PDF

Commercial Building Energy Saver: Getting Started Tutorial PDF

DEEP: A Database of Energy Efficiency Performance to Accelerate Energy Retrofitting of Commercial Buildings (2015 ASHRAE Winter Conference) PDF

Review of Existing Energy Retrofit Tools (LBNL Report) PDF

Commercial Building Energy Saver (CBES Flyer) PDF

Database of Energy Efficiency Performance (DEEP Flyer) PDF


Acknowledgements

This work is part of an on-going project funded by the California Energy Commission under the Public Interest Energy Research (PIER) Program Award No. PIR-12-031.This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.


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