1. Rapid Energy Modeling (REM) Workflow
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2. Technology Description
Rapid Energy Modeling (REM) technology was demonstrated in order to determine if the workflow is capable of producing useful, rapid and cost-effective estimates of energy consumption for DoD buildings
REM technology, including the Energy Conservation Measures (ECM) capabilities, uses whole-building energy simulation algorithms driven by the Department of Energy (DOE) 2.2 engine for energy analysis
The REM workflow involves three stages: (1) capture of existing conditions, (2) conceptual modeling of building masses using FormIt, Revit and Vasari, and (3) comparative analysis. The energy results of these building analyses are represented as annual energy use for natural gas and electric, monthly and annual cost, monthly energy use and energy use intensity

3. How Does It Work
Existing building geometry is captured using satellite photos. The operational characteristics of the building are appended to the geometric model and the local weather data to generate energy models to extrapolate the energy use of the modeled buildings.
This modeling information can be used to assist managers determine building performance compared to predicted energy use.

4. Benefits of the Technology
Quickly establish building geometry
Scale energy analysis of the existing building portfolio
Visualize end-use breakdowns of energy consumption
Compare tradeoffs and potential energy savings between energy conservation measures automatically
Identify and rank underperforming facilities
Enhance scalability of energy evaluations and retrofits
REM can yield >90% savings in time and cost compared to traditional ASHRAE Level 2 auditing approaches

5. Technology Success Stories
Technology has been successfully Demonstrated by ESTCP at 23 DoD buildings across nine locations and representing seven building types
REM analysis can be completed in less than 1 hour, with up to 2 additional hours that may be required for data collection.
The modeling process requires minimal training or expertise and has been taught to DoD staff in less than 1 day during this demonstration project.
ESTCP Demonstration Sites:
Fort Leonard Wood
Port Hueneme
Joint Base Lewis-McChord
Portsmouth Naval Shipyard
Naval Station Great Lakes
Seymour Johnson Air Force Base
Naval Surface Warfare Center – Panama City
U.S. Army Construction Engineering Research Laboratory (ERDC-CERL)
Naval Weapons Station Earle

6. Potential Challenges and Solutions
Focusing on these building systems and their operation adds large amounts of data to manipulate and manage to a process whose goal is to remain rapid and agile.
Engineers and energy analysts who want to do more detailed analyses can move REM data to eQuest or EnergyPlus for detailed work in those tools, which may require more expertise and detailed inputs. REM can yield substantial time savings versus initial model creation in eQuest or Energy Plus tools
Improperly Identified building and operational attributes of a particular building can impact modeling results. This is a general limitation of simulation

7. Sample Financial Considerations
The operational costs after the up-front expenditures would be $300 per building modeled with this process multiplied by the number of buildings studied at an installation

8. Bottom Line
Pros
Offers a level of detail not obtained through simple benchmarking
Significantly less cost than standard Level 2 energy audits
Develops a starting point in understanding how the studied building is operating using a model derived from a large set of existing buildings that are operating correctly
Cons
REM does not provide the detail of investment grade energy audits and does not cover some aspects of a Level 2 energy audit (such as equipment inventories and estimating costs for ECMs), although it does include computer simulation often part of Level 3 audits.

9. Where to Learn more
Mr. Tim Tetreault, ESTCP Energy and Water Program Manager,
SERDP-ESTCP Website,
Mr. John Sullivan, POC at Autodesk, ,
Installations:
Ms. Annette Stumpf, ERDC-CERL, ,
Mr. Gil Lurdes, Naval Weapons Station Earle, ,
Mr. Allen Simpson, Fort Leonard Wood, ,
Mr. Peter Behrens, Naval Station Great Lakes, ,
Mr. David Krohn, Joint Base Lewis-McChord, ,
Ms. Evelyn Baskin, NSWC Panama City, ,
Mr. Randy Pieper, Peterson AFB, ,
Mr. Brian Ballweg, Port Hueneme, ,
Mr. Lance Mahar, Portsmouth Naval Shipyard, ,
Mr. Elias Schtakleff, Seymour Johnson AFB, ,

10. Backup Slides

11. The REM process involves the following technologies:
Autodesk® FormIt software is an iOS and Android operating system application to create 3D models. FormIt captures existing building conditions using satellite images from Google and allows users to create a 3D geo-referenced building model while in the field.
Autodesk® Revit is a BIM software application with integrated energy and carbon analyses driven by Green Building Studio (GBS) and Department of Energy (DOE) 2.2.
Autodesk® Vasari software is for creating building conceptual models, with integrated energy and carbon analyses driven by GBS and DOE 2.2.
Autodesk® GBS is a web service that performs whole building energy analysis using the DOE 2.2 engine

12. Demonstration Performance Objectives

13. Demonstration Performance Objectives

14. Demonstration Performance Objectives

15. Demonstration Performance Objectives

16. Demonstration Performance Objectives