high performance buildings congressional caucus coalition april 11, 2012 washington, dc bruce d....
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High Performance BuildingsCongressional Caucus Coalition
April 11, 2012Washington, DC
Bruce D. HunnASHRAE
ENERGY EFFICIENCY GUIDE for EXISTING COMMERCIAL
BUILDINGS
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ENERGY EFFICIENCY GUIDE for EXISTING COMMERCIAL
BUILDINGS
Two-part series in collaboration with BOMA and GSA:
• The Business Case for Building Owners and Managers
• Technical Implementation
Developed by
ASHRAE, AIA, IESNA, USGBC, DOE
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The Business Case for Building Owners and Managers
Authors:
Landsberg
Lord
Carlson
Goldner
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Business Case: Purpose
• To equip decision makers to act to improve Building energy efficiency Operational performance
• Provides rationale for making economic decisions regarding energy efficiency in existing commercial buildings
• For owners, managers, operators, tenants, investors, and lenders
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Business Case: Purpose
Energy efficiency opportunities are underrealized in existing buildings,
especially in investment property sector (86% of U.S. building construction
expenditures in renovation of existing stock)
Bottom line:
“Energy efficient, green buildings aren’t just good for the environment, they are good for business”
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TABLE OF CONTENTS
1) Introduction
2) Measuring Energy Efficiency and Setting Goals
3) Improving Energy Performance
4) Making the Business Case
5) Developing an Effective O&M Program
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MEASURING ENERGY EFFICIENCY AND SETTING GOALS
• Energy Utilization Index (EUI in kBtu/ft2-yr)
• Benchmarks:Self referencingPortfolio referencing Peer buildings
through ENERGY STAR Portfolio Manager and/or CBECS
Copyright ASHRAE. EEG ECB The Business Case
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IMPROVING ENERGY EFFICIENCY
• Energy efficiency plan• Integrated approach: whole-building as
set of integrated systems and drivers (envelope, lighting, HVAC, climate, occupants)Operational adjustmentsUse free energy (OA, daylighting)Recover waste energyIncrease equipment efficiencyChange occupant behavior, purchasing
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IMPROVING ENERGY EFFICIENCY
Analyze energy end use:
Audits and Commissioning
Copyright ASHRAE. EEG ECB The Business Case
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OPPORTUNITIES BY END USELIGHTING
Lamps, ballasts, fixtures, controls
Copyright ASHRAE. EEG ECB The Business Case
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OPPORTUNITIES BY END USEBUILDING ENVELOPE
• Insulation• Shading
ENERGY DISTRIBUTION• Ventilation • Energy recovery
HEATING/COOLING, WATER HEATING• Equipment efficiency• Part-load operation• Controls
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Copyright ASHRAE. EEG ECB The Business Case
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MAKING THE BUSINESS CASE• Barriers to energy efficiency
Capital constraintsCollateral issuesHolding period biasSplit incentives
• SolutionsEnergy performance contractingGreen leasesGovernment/institutional incentives
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MAKING THE BUSINESS CASE
• Evaluating risksMarketRegulatoryEnvironmental
Copyright ASHRAE. EEG ECB The Business Case
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MAKING THE BUSINESS CASE
• Financial AnalysisSimple payback periodNet Present Value (NPV)Internal Rate of Return (IRR)Life-cycle costing (LCC)Calculating cash flows and savings of an
EEM
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DEVELOPING O&M PROGRAM
• Elevate energy management importance
• Require systems manual• Efficient operations in O&M• Invest in training• Performance monitoring and
reporting
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Copyright ASHRAE. EEG ECB The Business Case
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Technical ImplementationAuthors: Landsberg, Carlson, Goldner,
MacDonald, Slosberg
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Technical Implementation: Purpose
• To demonstrate ways to:Measure energy efficiencyTrack energy efficiencyDevelop energy efficiency planImplement the efficiency plan
• Intended for building engineers and managers; assumes working technical knowledge of building systems
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TABLE OF CONTENTS
1) Introduction
2) General Considerations
3) Measuring Energy Performance and Setting Goals
4) Understanding Energy Use and End-Use/System Efficiency
5) Selecting Energy Efficiency Measures
6) Refining Financial Analysis and Setting Priorities
7) Putting the Process Together