Implementation Rates of Energy Conservation Measures for Health Care Buildings the weidt group collaboration analysis research WWW.TWGI.COM HIGH PERFORMANCE BUILDINGS PAGE 1 THE WEIDT GROUP 2007 15 TH NATIONAL CONFERENCE ON BUILDING COMMISSIONING 2 MAY 2007
Energy Consulting Process Schematic Design Design Development Construction Documents Construction Occupancy Energy Measure Development DOE-2 Energy Modeling Cost Analysis Selection of Measures Draft CD Review Final CD Review Draft Verification Final Verification Energy Design Assistance Design Review and Verification PAGE 2 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Data Resources at The Weidt Group 554 Completed EDA Projects 100,000,000 Square Feet 428 Field Verified Projects One third of these done by The Weidt Group PAGE 3 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Design Review Process Construction Documents Windows Wall and roof insulation Daylighting control and other lighting control Lighting design Mechanical equipment Mechanical controls Look for specification of glass type Verify key parameters (U, SHGC, VT) Calculate overall U-value and compare with expected values Locate sensors and wiring on plans Review control sequences Count fixtures Check lamp and ballast types Check for fixture Watts Calculate W/sq ft Check for equipment types and efficiencies Check plans and schedules for key components Review control sequences PAGE 4 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Verification Process Submittals and Site Visits Windows Wall and roof insulation Daylighting control and other lighting control Lighting design Mechanical equipment Mechanical controls Look for specification of glass type in Submittals Verify key parameters (U, SHGC, VT) Check construction in Submittals Recalculate overall U-value, if needed Locate sensors in site visit Do functional test Do logging of lighting power to show trends Count fixtures on-site; check lamps and ballasts Determine Watts of representative fixtures Calculate W/sq ft Locate equipment in submittals and on-site Record nameplate efficiencies Check Submittals for key components Review control sequences in Submittals Conduct functional test where possible Do logging where possible to verify operation PAGE 5 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Implementation Rate Defined Implementation = Energy Savings at Stage Energy Savings at Selection Four Stages: Draft CD Review (DCD) Final CD Review (CD) Draft Verification (DV) Final Verification (V) PAGE 6 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Implementation Rates Reasons to Study How much falls out between modeling effort and release of CDs? How much can be restored by each stage of the Design Review and Verification process? PAGE 7 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Implementation Rates Reasons to Study What is the relative importance of CD review and post construction verification? How does this vary by measure type? PAGE 8 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Previous Implementation Rate Study by The Weidt Group Number of buildings 105 New construction; total Project scope building or addition Floor area per building 20,000 to 900,000 sq ft Location Iowa Office K-12 School College/ University Building types Lab Health Care Mixed Use Source: Measuring the Success Rate of ECMs in New Construction; Greden, et al; ACEEE 2006 Summer Study PAGE 9 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Implementation Rates By Stage From Previous Study 120% 110% 38 Buildings 5 Building Types Implementation Rate 100% 90% 80% 70% 15 % Drop 2% Rise 4% Rise 1% Drop 60% Selection DCD CD DV V PAGE 10 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Final Implementation Rates By Building Type from Previous Study Schools must follow state mandate for energy measures Schools have high repeat participation by owners and design team 57 Projects % kwh Savings Implementation Rate at Verification 110% 100% 90% 80% 70% College School Hospital Office (8 projects) (34) (5) (10) Building Type (No. of Projects) PAGE 11 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Final Implementation Rate By Participation Rate from Previous Study Implementation Rate at Verification 110% % kwh Savings 100% 90% 80% 70% Firm A Firm B Firm C Others (3 projects) (3) (2) (1 proj. each, 16 firms) Architect (no. of projects) PAGE 12 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Health Care Buildings Current Study Number of buildings 16 Project scope New construction; total building or addition Floor area per building 50,000 to 500,000 sq ft Location Iowa, Minnesota, Colorado Building Type Health Care PAGE 13 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Modeled Energy Savings for Selected Measures Average of 16 Health Care Buildings Annual Dollars Electric Energy kwh Peak Electric kw Gas Energy Savings 23% 30% 28% 6% PAGE 14 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Implementation Rate By Stage for 16 Health Care Buildings 140% 120% Implementation Rate 100% 80% 60% 40% 20% 0% Selection DCD CD DV V PAGE 15 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Average Implementation Rate By Stage for Health Care Buildings 120% 110% Implementation Rate 100% 90% 80% 70% 19 % Drop 6% Rise 5% Rise 1% Rise 60% Selection DCD CD DV V PAGE 16 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Average Implementation Rate By Stage for Health Care Buildings $0.50 Annual Energy Savings, $/sq ft $0.45 $0.40 $0.35 $0.30 $0.25 $0.12/sf Drop $0.023/sf Rise $0.023/sf Rise $0.003/sf Rise $0.20 Selection DCD CD DV V PAGE 17 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Comparison with Previous Study 120% 110% Previous Study (38 buildings) Health Care Study (16 buildings) Implementation Rate 100% 90% 80% 70% 60% Selection DCD CD DV V PAGE 18 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Implementation Rates By Strategy Type for Envelope and Lighting Lighting Power Density Lighting Control Envelope Switched Daylighting Dimming Daylighting 140% 120% Implementation Rate 100% 80% 60% 40% 20% 0% Model CD Review Verified PAGE 19 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Implementation Rates By Strategy Type Mechanical Heating and Cooling Equipment Motor Efficiency and VFDs 120% Outside Air Control 100% Implementation Rate 80% 60% 40% 20% 0% Model CD Review Verified PAGE 20 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Conclusions Trends for Health Care buildings are similar to other building types Highest loss of savings occurs between Selection of Measures and release of CDs CD review stages show highest savings potential Verification savings show significant savings for some projects PAGE 21 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Conclusions Controls oriented measures are much more likely to have lost savings than equipment measures Avg 70% loss for dimming daylighting Avg 62% loss for outside air control PAGE 22 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007
Thank you the weidt group collaboration analysis research DOUG MADDOX DOUGM@TWGI.COM PAGE 23 THE WEIDT GROUP 2007 IMPLEMENTATION RATES OF ENERGY CONSERVATION MEASURES 2 MAY 2007