Importance of NIK Alternatives to Phase Down of High GWP HFCs Steve Seidel and Jason Ye (C2ES), Stephen O. Andersen (IGSD), and Alex Hillbrand (NRDC) 28 th Meeting of the Parties Kigali, Rwanda October 10, 2016

Role of “Not-in-Kind (NIKs) — Overview Alternatives to replace high GWP hydrofluorocarbons (HFCs) already exist and more are being developed Focus has been on next generation hydrofluoroolefins (HFOs) and HFO/HFC blends HFOs have zero ODP and ultra low GWP (less than 1) HFO/HFC blends have zero ODP and low GWP depending on portion of ingredients NIK alternatives have played a major role in past ODS phase-outs NIK alternatives are widely available to replace HFCs for many sectors HFC regulations in EU, US, Japan and Canada are driving shift away from HFCs Near-term options exist that avoid patent protected HFOs Opportunities exist for up to 50 percent replacement of HFCs with NIKs

What are NIKs? Generally refers to alternatives that are not fluorinated Wide range of NIKs available including: Blowing agents: hydrocarbon, water and carbon dioxide Refrigerants: ammonia, carbon dioxide and hydrocarbon Extinguishing agents: water, water mist, dry powder, and foam Metered dose inhalers: dry-powder inhalers (DPIs), oral and injectable drugs Emission (leak) reductions and recycling/recovery also contribute to reductions Estimated that transition out of ODS replaced 85 percent of use with NIKs or through emission reductions/recovery

Projected Growth in HFCs Without an HFC amendment, consumption grows significantly Past growth in developed countries quickly outpaced by growth in developing countries By 2050, 80 percent of HFC use in developing countries

HFC Use by Sector Current use of HFCs concentrated in air conditioning (56%) and refrigeration (30%) sectors; foam a distant third (7%); aerosol products/fire protection a distant fourth/fifth (4%/3%); and solvents just 1% Analysis focuses on these three sectors

Refrigeration Sector Includes domestic, commercial, industrial and transport subsectors Projected to grow at 6 percent annually Commercial refrigeration largest subsector

Refrigeration Sector Fluorocarbon Alternatives NIKsComments DomesticHFO-1234yf HFO 1234ze Hydrocarbons Hydrocarbon blends HFOs are being considered. HC systems widely used. CommercialHFO-1234yf HFO-1234ze HFO/HFC blends Hydrocarbons Ammonia Carbon dioxide HFO/HFC blends are growing in use; HCs widely used in systems with smaller charges; carbon dioxide growing in use in commercial systems. IndustrialHFO-1233zd HFO-1336mzz HFO-1234ze HFO/HFC blends Hydrocarbons Ammonia Carbon dioxide HFOs and blends increasing in use. Ammonia widely used for large systems; Ammonia used for cold stores. TransportHFO/HFC blendsHydrocarbons Carbon dioxide HFO/HFC blends in limited use; HC and carbon dioxide systems being developed.

Air Conditioning Sector Includes stationary, chillers and mobile Projected growth of 4.5 percent annually Stationary is largest subsector

Air Conditioning Sector Fluorocarbon Alternatives NIK AlternativesComments Stationary ACHFO-1234yf HFO-1234ze HFO-12336mzz HFC-32 HFO/HFC blends Hydrocarbons Ammonia Water Carbon dioxide Systems with smaller charges are widely available using HFC-32 and hydrocarbons; HFC-HFO blends developed for larger systems. ChillersHFO-1233zd HFO- 1336mzz HFO-1234ze HFO/HFC blends Hydrocarbons Ammonia Water Hydrocarbons used for medium and large chillers; HFOs and blends being developed for small and medium-size systems. Mobile ACHFO-1234yf HFC-152a HFO/HFC blends Carbon dioxideHFP1234yf widely used; Carbon dioxide being commercialized by two companies for some models; HFC-152a being tested in secondary loop.

Foam Sector Includes polyurethane (PU) and extruded polystyrene (XPS) foams Projected decline of 2.2growth percent annually XPS is largest subsector Hydrocarbons widely used, making up more than half of consumption in this sector

Foam Sector Fluorocarbon Alternatives NIKsComments PUHFO-1336mzz HFO-1234ze HFO-1233zd CO 2 CO 2 with co- blowing agent Supercritical CO 2 Most HFOs are commercially available; HFO-1336mzz expected in CO 2 is available and widely used; Supercritical CO 2 used only in Japan. XPSHFO-1234zeCO 2 Commercially available; used in Europe.

NIK Substitution Opportunities Sectors contribute the following potentials for NIK solutions: High (70 percent): domestic refrigeration, industrial refrigeration, commercial refrigeration, and fire protection Medium (50 percent): aerosols and foams Low (20 percent): heating heat pumps, chillers, MAC, stationary AC, and transportation refrigeration

Emerging Technology Can Expand NIK Use Appropriate charge limits/safety standards for flammable refrigerants Smaller flammable charge and better containment System design to slow worst-case refrigerant discharge Isolate flammable and toxic refrigerants with secondary loop of non- flammable coolant to occupied spaces Active safety systems Non-fluorinated low-GWP refrigerant ingredients to reduce flammability of natural refrigerants

Key Takeaways (1) In the absence of an HFC phase-down amendment, HFC growth in A5 Parties would continue with more than 80 percent of use of HFCs in Article 5 Parties in 2050 In response to domestic regulations by non-A5 Parties, alternatives to high-global GWP HFCs have been developed and are being used in all major use sectors In most sectors a range of options exists including next-generation (hydrofluoroolefins — HFOs and HFO/HFC blends), lower-GWP HFCs, HCs and other non-fluorocarbon refrigerants and foam blowing agents

Key Takeaways (2) In past transitions, NIK alternatives including substitutes other than fluorocarbons (e.g., HCs, CO 2 ), recycling/recovery, and emission reductions have reduced reliance on ODSs by as much 85 percent Based on the current availability of non-fluorinated alternatives and likely emission reductions, NIK alternatives have the potential to be substitutes for 50% of HFCs NIKs and lower-GWP HFCs provide market and price competition to next-generation HFO substitutes which are restricted by patents for a specified period of time Efforts are underway but will require several more years to fully address changes in codes and standards to ensure a wider range of more flammable alternatives can be used safely