Identifying Potential Scope Options � 125 Scope Options � 50 Energy Conservation Measures (ECMs) Primary Envelope Zone-Level End-of-Life Energy Source Replacements Upgrades HVAC Upgrades • Existing campus • Wall insulation • Window • Retrofit existing replacement • Overcladding hot water system Reroofing • • Radiant ceilings • Geothermal • VRF • High-efficiency • Ventilation air gas boilers 18 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Scope Evaluation Criteria � Operational Carbon Impact � Space Use Impacts � Embodied Carbon Impact � Cost � Thermal Comfort � Regulatory Requirements � Impacts to Historic � User Control Character � Accessibility Improvements � Applicability to Other Campus Buildings � Maintenance Implications 19 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Conditions Assessment Uninsulated opaque wall Window/Louver Insulated opaque wall 20 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Analysis-Driven Decision Making � Thermal modeling � Parametric energy modeling � Life cycle assessment � Summer comfort 21 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Analysis � Thermal Modeling Bay Overclad Option, R-10 Existing Bay Window, R-1.9 22 22 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Analysis � Energy Modeling TOP 10 ENERGY CONSERVATION MEASURES 250 Operational Carbon Savings (mtCO2e/yr) 200 Envelope End-of-Life 150 Replacements Zone-Level HVAC Upgrades 100 Envelope Upgrades 50 Primary Energy Source Potential 0 23 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Analysis - Life Cycle Assessment Envelope End-of-Life 700 Replacements Spray Foam Envelope Upgrades 600 (for reference only) 500 400 GWP (MTco2e) SIPS 300 200 Mineral Wool 100 SIPS Wood Fiber Wood Fiber 0 Window - Window - Roof - R30 Roof - R60 Exterior Full Full Bay 1 1/2" 3 5/8" 1 1/2" 3 5/8" Double Triple Doors Overclad Overclad Overclad Interior Interior Partial Partial -100 Glazed Glazed Insulation Insulation Interior Interior Insulation Insulation 24 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Carbon Return on Investment 10 Envelope End-of-Life Replacements Spray Foam Envelope Upgrades 8 Mineral Wool 6 YEARS SIPS 4 2 Wood Wood SIPS Fiber Fiber 0 CARBON Window - Window - Roof - Roof - Exterior Full Full Bay 1 1/2" 3 5/8" 1 1/2" 3 5/8" POSITIVE Double Triple R30 R60 Doors Overclad Overclad Overclad Interior Interior Partial Partial Glazed Glazed Insulation Insulation Interior Interior -2 Insulation Insulation 25 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Comprehensive Decision- User-selection list of scope items making of scope items sorted by category criteria Total scenario cost 26 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Top 5 Takeaways for Carbon Smart Reuse 1. Improving building airtightness is the first step in reducing energy consumption. 2. Super-insulating walls and roofs does not always result in dramatic improvements to energy performance. 3. Predicting embodied carbon is important to understand carbon return on investment. 4. Carbon reduction potential is limited at the building scale. Retrofits must be designed for compatibility with greening energy sources to maximize carbon savings. 5. One size does not fit all. 27 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Conclusions
Building Reuse = Climate Action � Reusing existing buildings is a critical strategy for carbon neutrality policies and climate action plans � Colleges and Universities have a key role to play: � Leverage existing buildings towards carbon reduction on heritage campuses � Build on legacies of stewardship � Educate communities about environmental benefits of building reuse � Model cutting-edge solutions to global challenges 29 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
Learn More and Get Involved http://climateheritage.org / Boston Society for Architecture 12-part series https://www.architects.org/embodied- carbon-101 https://www.culturexclimate.org/ https://secondnature.org/signatory- handbook/the-commitments/ Carbon Leadership Forum http://carbonleadershipforum.org 30 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
THANK YOU! lori.ferriss@goodyclancy.com 31 Climate Action through Reuse of Historic Facilities SCUP/APT WEBINAR, OCTOBER 20, 2020
HVAC Competing Priorities • Preservation Standards • Comfort Requirements • Building Envelope Limitations • Modern Building Codes • Infrastructure Needs • Campus Design Standards • Facilities Department Requirements
Define the Project Objectives • Improving Comfort? • Improving Energy Efficiency? • Improving Indoor Air Quality? • Preserving the Building? Probably all of the above to some degree
HVAC Project Types • HVAC Maintenance & Repair • Reduce HVAC Heat Loads – Fix the Building Envelope • HVAC System Upgrades • New HVAC Systems
HVAC Project Types • HVAC Maintenance & Repair • Reduce HVAC Heat Loads – Fix the Building Envelope • HVAC System Upgrades • New HVAC Systems
Examples of HVAC Maintenance & Repair Projects • Fix the broken Stuff • Replace Steam Traps • Fix or Improve Controls • Fix Airflow blockages • Seal and insulate ducts • Insulate pipes
Who Is Involved? • Project Facilitator • Facilities Maintenance Staff • Building Occupants • Energy auditor (if in-house expertise not available)
Where To Start? • Understand Existing Conditions • Seek Out Available Documentation
Understand Existing Conditions • Maintenance Records • Monitoring • Energy Audit • Search Out Building Drawings • Look In Every Nook & Cranny
Monitoring • Benchmark – Base Line Conditions & Comparison • Justify Need For Change • Diagnose HVAC Faults • Identify Moisture Problems
Energy Audit Tools
Become intimately familiar with the Building
Identify and Prioritize Potential Improvements • Look for the low hanging fruit • Establish budgets • Estimate return on the investment • See if some other department will pay for it
HVAC Project Types • HVAC Maintenance & Repair • Minimize HVAC Heat Loads � Fix the Building Envelope • HVAC System Upgrades • New HVAC Systems
Minimize HVAC Heat Loads • Solar • Lights • Transmission • Infiltration • Moisture Issues
Possible Projects to Reduce HVAC loads: • Replace Lighting • Introduce Shading • Add Insulation To Building Envelope • Add Storm Windows or Restore/Replace Windows • Reduce Air Leakage With Sealing And Weather Stripping. • Improve Exterior Drainage
Who is Involved? • Project Facilitator • Facilities Maintenance Staff • Campus Architect • Campus Engineering or Outside HVAC Engineer • Preservation Architect • Building Envelope Consultant • State Historic Preservation Office ?
Where to Start? • Generate Good Documentation • Identify Historic Features
Generate Good As-Built Documentation • Photographs • Measurements • Exploration
Identify Historic Building Features • Historic Structures Reports • National Register Nominations • Historic Building Preservation Plan (HBPP)
FAÇADE IS HISTOR IC
Design Guidance • Secretary of the Interior Standards for Rehabilitation • National Park Service Preservation Briefs • GSA Center for Historic Buildings • APT OSCAR
Identify and Prioritize Potential Improvements • Establish Budgets • Life Cycle Cost Analysis • Identify preservation concerns • Adding insulation to masonry walls • Installing new windows in historic façade
Project Types • HVAC Maintenance & Repair • Minimize HVAC Heat Loads – Fix the Building Envelope • HVAC System Upgrades • New HVAC Systems
Examples of Possible HVAC Upgrade Projects • Improve air filtration • Replace cooling coils • Add zones • Upgrade controls • COVID-19 related upgrades
Who is Involved? • Campus Project Facilitator • Facilities Maintenance Staff • Campus Architect • Campus Engineering (if the resource is available) • HVAC Engineer
Establish Environmental Criteria • Comfort Temperature Range • Comfort Humidity Range (COVID 19) • Noise & Vibration Criteria • Indoor Air Quality (COVID 19) • What can the Building Envelope Support CREATE A FORMAL BASIS OF DESIGN
HVAC System Selection Factors • Performance • Energy Efficiency • Life Cycle Cost • Maintenance (Campus Facilities Dept) • Aesthetics
Recommend
More recommend
