LIFE-CYCLE ASSESSMENT (LCA) FOR SPRAY POLYURETHANE FOAMS
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1 LIFE-CYCLE ASSESSMENT (LCA) FOR SPRAY POLYURETHANE FOAMS Rick Duncan Spray Polyurethane Foam Alliance George Pavlovich Bayer MaterialScience LLC Shen Tian Bayer MaterialScience LLC The information provided herein are believed to be accurate and reliable, but are presented without guarantee or warranty of any kind, express or implied. User assumes all risk and liability for use of the information and results obtained. Statements or suggestions concerning possible use of materials and processes are made without representation or warranty that any such use is free of patent infringement, and are not recommendations to infringe any patent. The user should not assume that all safety measures are indicated herein, or that other measures may not be required.
2 AGENDA Definitions Goal and Scope Inventory Analysis Impact Assessment Interpretation and Value Next Steps Acknowledgements
3 What is Life-Cycle Assessment? Life-Cycle Assessment (LCA) is a technique to assess environmental impacts associated with ALL stages of a product's life
4 What is Life-Cycle Assessment? LCAs prevent a narrow outlook on environmental concerns (single-attribute evaluations) by: Utilizing a recognized global methodology that provides a transparent, holistic and balanced approach to product evaluation Compiling an inventory of all energy/material inputs and environmental releases Evaluating the potential impacts associated with all inputs and releases Interpreting the results to help customers make informed and technically sound decisions
5 What is Life-Cycle Assessment? The International Standards Organization (ISO) provides a structured process to assure fair, credible and transparent LCA results Relevant (ISO) LCA Documents 1. ISO 14040: Environmental Management Life Cycle Assessment Principles and Framework, Second Edition; International Organisation for Standardisation, ISO 14044: Environmental Management Life Cycle Assessment Requirements and Guidelines, First Edition; International Organisation for Standardisation, 2006.
6 What is Life-Cycle Assessment? Four basic stages of LCA flow diagram from ISO Standard Goal and Scope Definition Inventory Analysis Interpretation Impact Assessment
7 Goal and Scope Definition Goal Enterprise/Industry: Develop environmental strategy for products and services Manufacturing: Create and improve sustainable manufacturing processes Customers: Use materials and processes based on LCA results and avoid single-attribute product selection. Evaluate environmental impact, and provide LCA/EPD credits for sustainable building programs.
8 Scope Goal and Scope Definition Functional Unit System Boundaries Assumptions and Limitations Allocation Methods Environmental Impact Categories
9 Goal and Scope Definition Scope: Functional Unit Defined by the primary function fulfilled by a product system Enables equal comparison of alternative product systems Determines the reference flow on which amounts of inputs and outputs are calculated For all building insulation products, the functional unit is defined by a new Product Category Rule document[1] (2011): 1m² of insulation material with a thickness that gives a design thermal resistance R SI = 1 m²k/w and with a building service life of 60 years
![For all building insulation products, the functional unit is defined by a new Product Category Rule document[1] (2011): 1m² of](/docs-images/42/23068834/images/page_9.jpg "insulation material with a thickness that gives a design thermal resistance R SI = 1 m²k/w and with a building service life of")
10 Goal and Scope Definition Scope: System Boundaries Defines what precisely what materials and processes are to be included in the LCA Other Building Raw Other Building Raw Manufacturing Building Installation Building Use Heating / Cooling Building End-of-Life Maintenance SPF Raw SPF Raw Manufacturing SPF Installation SPF Use and Maintenance SPF Disposal LCA Study Boundary
11 Goal and Scope Definition Scope: Assumptions and Limitations Defines the time, technology and geographic limits of the data Time: Raw material and process data < 5 years old Technology: Three generically-formulated SPF products Geography: United States Data: Primary data from industry sources, other raw materials from recognized sources (GaBi, NREL LCI databases) Cut-off Rules: Ignore energy, materials or emissions <1% if not environmentally relevant
12 Goal and Scope Definition Scope: Allocation Methods Defines allocation of resource consumption and environmental impacts from joint production of materials used for other processes
13 Goal and Scope Definition Scope: Environmental Impact Categories Defines environmental impacts per functional unit per Tool for the Reduction and Assessment of Chemical and Other Environmental Impacts (TRACI) 2.0 methodology, except USETox and PEI special energy flow Impact Category Characterization Factor Description Unit Global Warming Potential (GWP) Eutrophication Potential (EP) Acidification Potential (AP) Photochemical Ozone Creation Potential (POCP) Ozone Depletion Potential (ODP) A measure of greenhouse gas emissions, such as CO 2 and methane. Eutrophication covers all potential impacts of excessively high levels of macronutrients, the most important of which nitrogen (N) and phosphorus (P).. The acidification potential is a measure of a molecule s capacity to increase the hydrogen ion (H + ) concentration in the presence of water, thus decreasing the ph value. A measure of emissions of precursors that contribute to ground level smog formation (mainly ozone O 3 ), A measure of air emissions that contribute to the depletion of the stratospheric ozone layer. Additional Inventory/Impact Category Description Unit Primary Energy Demand (PED) [1] A measure of the total amount of primary energy extracted from the earth, expressed in energy demand from non-renewable or renewable resources [1] PED is a special inventory flow created by PEI using the concept of primary energy kg CO 2 equivalent kg Nitrogen equivalent mol H + equivalent kg O 3 equivalent kg CFC-11 equivalent MJ
14 Inventory Analysis Other Building Raw Other Building Raw Manufacturing Building Installation Building Use Heating / Cooling Building End-of-Life Maintenance SPF Raw SPF Raw Manufacturing SPF Installation SPF Use and Maintenance SPF Disposal LCA Study Boundary
15 Inventory Analysis Other Building Raw Other Building Raw Manufacturing Building Installation Building Use Heating / Cooling Building End-of-Life Maintenance SPF Raw SPF Raw Manufacturing SPF Installation SPF Use and Maintenance SPF Disposal LCA Study Boundary Work completed by PE International Detailed in separate report to be made available to SPFA members Independently reviewed by 3-person Critical Review Panel
16 Inventory Analysis Other Building Raw Other Building Raw Manufacturing Building Installation Building Use Heating / Cooling Building End-of-Life Maintenance SPF Raw SPF Raw Manufacturing SPF Installation SPF Use and Maintenance SPF Disposal LCA Study Boundary SPF Raw Includes A-side MDI and B-side polyols and additives Obtained from LCI data from GaBi and other reputable sources
17 Inventory Analysis Other Building Raw Other Building Raw Manufacturing Building Installation Building Use Heating / Cooling Building End-of-Life Maintenance SPF Raw SPF Raw Manufacturing SPF Installation SPF Use and Maintenance SPF Disposal LCA Study Boundary SPF Raw Manufacturing Includes transportation, blending and packaging of raw materials by formulator Data from six different formulators was obtained via survey Generic formulations provided by SPFA and CPI
18 Inventory Analysis SPF Formulations Low-Density Open Cell Medium-Density Closed-Cell Roofing Density (lb/ft3) Thermal Performance (R/inch) Polyol Polyester - 45% 35% Mannich - 30% 45% Compatibilizer 10% - - Polyether 35% - - Fire Retardant TCPP 25% 4% 8% Brominated - 6% - Blowing Agent Reactive (H2O) 24% 2% <2% Physical (HFC) - 9% 7% Catalyst Amine 6% 3.00% 2% Metal - <1% <1% Surfactant Silicone <1% 1.00% 1%
19 Inventory Analysis Other Building Raw Other Building Raw Manufacturing Building Installation Building Use Heating / Cooling Building End-of-Life Maintenance SPF Raw SPF Raw Manufacturing SPF Installation SPF Use and Maintenance SPF Disposal LCA Study Boundary SPF Installation Includes materials transportation, high-pressure application, PPE/consumables and factors such as trim waste and product yield Data from several SPF contractors was obtained by PEI
20 Inventory Analysis Other Building Raw Other Building Raw Manufacturing Building Installation Building Use Heating / Cooling Building End-of-Life Maintenance SPF Raw SPF Raw Manufacturing SPF Installation SPF Use and Maintenance SPF Disposal LCA Study Boundary SPF Disposal Conservatively assumes all foam will go to landfill when building is demolished
21 Inventory Analysis Other Building Raw Other Building Raw Manufacturing Building Installation Building Use Heating / Cooling Building End-of-Life Maintenance SPF Raw SPF Raw Manufacturing SPF Installation SPF Use and Maintenance SPF Disposal LCA Study Boundary SPF Use and Maintenance Performed detailed energy modeling of typical new residential home with SPF insulation to 2009 I-code Performed detailed energy modeling of typical existing commercial building with SPF roofing system added (R20) Three representative climate zones considered (MN, VA, TX)
22 Use-Phase Inventory Analysis All results included in detailed report from Sustainable Solutions. Noticeable residential energy savings due to reduced air leakage, especially in colder climates Moderate commercial building energy savings from additional SPF roof insulation
23 SPF Use-Phase Energy Modeling Inventory Analysis Houston (IECC Zone 2A) Richmond (IECC Zone 4A) Minneapolis (IECC Zone 6A) No insulation Spray Foam No insulation No insulation Spray Foam Spray Foam Baseline attic floor UVA Baseline Baseline Attic Floor Insulation Thermal Resistance 0 R Roof Deck Insulation R30 0 R38 0 R49 Wall Construction 2x4 16 oc 2x4 16 oc 2x4 16 oc 2x4 16 oc 2x4 16 oc 2x4 16 oc 2x4 16 oc Wall Insulation (cavity) Thermal Resistivity 0 R13 R13 0 R13 0 R19 Ventilation Exhaust New Residential Home 2434 SF with typical home Two-story Wood-frame construction Insulated to IRC 2009 per climate zone Air-leakage rates from SPF vs fibrous insulation included in model performed using EnergyGauge software ERV (78% 55 cfm) ERV (78% 55 cfm) Exhaust ERV (78% 55 cfm) Exhaust ERV (78% 55 cfm) Air infiltration (ACHn) HERS Score Annual Cooling (kwh) Annual Heating (kwh) Annual Heating (therms)
24 SPF Use-Phase Energy Modeling Inventory Analysis Existing Commercial Building 10,000 SF post-1980 strip-mall building Existing roof assembly R-values of R4 and R12 assumed on underside of roof deck Additional roofing SPF added to create R20 roof assembly per ASHRAE Air-leakage rates from SPF vs fibrous insulation NOT included in model performed using EnergyPlus software Houston (IECC Zone 2A) Richmond (IECC Zone 4A) Minneapolis (IECC Zone 6A) R4 Baseline R12 Baseline R20 with R12 R4 Baseline added SPF Baseline R20 with R12 R4 Baseline added SPF Baseline R20 with added SPF Roof Deck Insulation Thermal Resistance R4 R12 R20 R4 R12 R20 R4 R12 R20 Ventilation Fans (kwh) Space Cooling (kwh) Annual Heating (therms) ,000 20,000 19,100
25 Impact Assessment Cradle-to-Grave, including Use-Phase Primary Energy from non-renewable resources Climate Change Acidification Eutrophication Ozone Depletion Smog Creation
26 Impact Assessment
27 Impact Assessment
28 Impact Assessment
29 Impact Assessment
30 Impact Assessment
31 Impact Assessment
32 Interpretation Environmental impacts avoided in the use-phase overwhelm the impacts of the other life-cycle phases Application SPF Type Ratio & Payback Houston Richmond Minneapolis Energy GHG other [1] Energy GHG other [1] Energy GHG other [1] Residential Insulation Commercial Roofing Open-Cell SPF Closed-Cell SPF Roofing SPF R4 --> R20 Roofing SPF R12 --> R20 Avoided/Embodied Payback (Yr) ~1.9 Avoided/Embodied Payback (Yr) ~3.6 Avoided/Embodied Payback (Yr) ~3.0 Avoided/Embodied Payback (Yr) ~6.9 [1] Other impact Categories include Acidification, Eutrophication, Ozone Depletion and Smog Creation
33 Interpretation Environmental impacts avoided in the use-phase overwhelm the impacts of the other life-cycle phases
34 Interpretation Environmental impacts avoided in the use-phase overwhelm the impacts of the other life-cycle phases
35 Interpretation IMPORTANT NOTES ON RESULTS: Payback times may be shorter; analysis does not include impacts of : Reduced framing depth and structural improvements for MD-SPF Vapor retarder needed for LD-SPF in cold climates Product-specific attributes will affect results Coverage Rate R-value Density Raw
36 Interpretation Comparison with other Insulations Data for other insulations published in LCA Databases Before comparison of environmental impacts, check: Functional Unit Data Quality and Completeness geographic region Study Boundary cradle/end-of-life cradle/gate, etc. Peer-Reviewed Process
37 Project Documents Interpretation Several documents will be publically available summarizing the key results from this project. Detailed Technical Report (SPFA) on website Summary Brochure (SPFA) on website Technical Paper and Presentation (CPI Paper) Environmental Product Declaration (EPD) mid 2013 U.S. LCI Database Entry EPD template for material suppliers done
38 Acknowledgements History LCA project initially started in Nov 2008-June 2009 Resumed Nov 2010 to Present Project Volunteers George Pavlovich and Shen Tian of Bayer MaterialScience for technical leadership Project Sponsor Reviewers Funding Sources $130k sponsorship from 17 SPFA-member suppliers $50k from SPFA General Budget $5k from ACC BCMIT Program towards CRP costs
39 Acknowledgements SPFA Supplier Sponsors Industry Association Sponsors
40 Questions?
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