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The GreenChill Advanced Refrigeration Partnership GreenChill & Natural Refrigerants.

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Presentation on theme: "The GreenChill Advanced Refrigeration Partnership GreenChill & Natural Refrigerants."— Presentation transcript:

1 The GreenChill Advanced Refrigeration Partnership GreenChill & Natural Refrigerants

2 U.S. Food Retail Refrigeration Environmental Impact 35,000,000 lbs. of supermarket refrigerant emissions annually DX (direct expansion) systems R-22 refrigerant (at least 50% of stores) High GWP substitute refrigerants (maybe 50% of stores) Clean Air Act & Regulations to reduce supermarket refrigerant emissions Leak repair trigger for equipment that leaks 35% of its charge annually

3 The GreenChill Advanced Refrigeration Partnership Voluntary partnership program with food retailers to reduce their impact on the ozone layer and climate change Measure emissions set goals measure again Store Certification Program Promoting advanced refrigeration technology, strategies, practices

4 GreenChill Expansion Launched with 10 founding partners in Nov Less than 2 years later: 46 partner companies 6533 food retail stores 47 of 50 states (+DC) about $120 billion in sales

5 GreenChill Food Retail Partners

6 GreenChill Partner Achievements GreenChills supermarket partners emit on average 12.3% of their charge (vs. 25% national average) If every supermarket in the nation reduced refrigerant emissions down to 12.3%... Potential greenhouse gas savings of 22,000,000 metric tons of CO2 equivalent PER YEAR Potential to save 240 ODP tons PER YEAR Over $108,000,000 industry savings PER YEAR

7 Recent Progress for Natural Refrigerants CO2 use as primary refrigerant – EPAs SNAP Program CO2 use as secondary refrigerant Propane use for stand alone commercial refrigeration equipment is going to be found acceptable by SNAP program Natural refrigerant protocol being implemented for GreenChill platinum level certification Signs of increased interest over past few months

8 Price Chopper - Saratoga, NY Store CO2 Cascade Remodel First CO2 Cascade System in the U.S. (low temp. only) Positive results with the system Low carbon footprint Low cost of refrigerant ($.50/lb.) Smaller line sizes Reduced copper piping Increased system efficiency

9 Price Chopper - Saratoga, NY Store CO2 Cascade Remodel

10 Food Lion - Columbia, SC Store CO2 Cascade


12 Food Lion - Atlanta, GA Store CO2 Cascade



15 Other Factors Affecting Acceptance US proposal to phase down HFC use under Montreal Protocol US Greenhouse Gas Legislation is expected Price pressure due to R-22 phaseout? Isobutane use is going to be found acceptable for home refrigerators and freezers by SNAP program

16 General Challenges Need application to start SNAP process Lack of svc. tech experience/training Lack of data Fear of liability, esp. for NH3 & HCs Publicity about dangers, toxicity, flammability Higher costs of natural refrigerant systems No economies of scale yet, low volume High prices for European equipment No manufacturer cross over among US manufacturers

17 General Challenges No drop-in retrofits available for existing systems Multiple layers of complicated regulations-federal, state, local, building codes, permitting No understanding among local officials about advantages and disadvantages of natural refrigerants No good guidelines for safe implementation Philosophical debate: stop leaks or move to low GWP refrigerant?

18 General Challenges Reluctance to change – satisfaction with chemical refrigerants Inexpensive Readily available Lots of training by chemical companies Chemical systems are very forgiving and safe – natural refrigeration systems require more care with system design, installation, servicing

19 Specific Challenges – CO2 No US manufacturer for transcritical systems ASHRAE has very specific language for design pressures – US Guidelines are stringent & conservative; liability Trying to adapt it for cascade systems Transcritical standards are a long way off No Underwriters Laboratory approval yet Energy penalty esp. in warmer climates Hard to explain difference between good CO2 and bad CO2

20 Specific Challenges for Natural Refrigerants - hydrocarbons Not yet SNAP approved for commercial refrigeration Very high charges would be needed – flammability; liability

21 Specific Challenges for Natural Refrigerants - Ammonia SNAP-approved for use as primary refrigerant in secondary loop commercial applications; no demand Use in industrial areas; supermarkets located in residential neighborhoods Must have engineer on-site 24/7/365 & process safety management plan Difficulties servicing equipment Lg. industrial plants can shut down facility for inspections/maintenance No service tech. cross over - different education, pay levels Different end-user needs Industrial systems - durable, expensive, long-term Supermarket systems – remodeled every 10 years, short-term, cheap

22 For More Info Keilly Witman Stratospheric Protection Division U.S. EPA Tel: (202)

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