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Air Conditioning. EPA Core. Effects of Ozone Depletion. Skin Cancer Cataracts Crop loss Immune system deficiencies. Stratospheric Ozone Depletion. Located 10 – 30 miles above the earth Ozone consists of 3 oxygen atoms Ozone depletion ---- Global Problem
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Air Conditioning EPA Core
Effects of Ozone Depletion • Skin Cancer • Cataracts • Crop loss • Immune system deficiencies.
Stratospheric Ozone Depletion • Located 10 – 30 miles above the earth • Ozone consists of 3 oxygen atoms • Ozone depletion ---- Global Problem • Ozone Layer located in stratosphere.
Chlorine • Depletes the Ozone • Forms chlorine monoxide when chlorine atom meets ozone molecule • 1 Chlorine atom can destroy 100,000 ozone molecules • Atmospheric life can be 100 years.
Refrigerants • CFC--- Chlorine, Fluorine, Carbon (R-11, R12) • HCFC--- Hydrogen, Chlorine, Fluorine, Carbon (R22) • HFC--- Hydrogen, Fluorine, Carbon (R134a).
Refrigerant uses • Heating • Cooling • Foam blowing agents • Cleaning solvents.
July 01, 1992 No Venting of CFC’s & HCFC’s
The Three R’s • Recovery • To Remove refrigerant in any condition and store it in an external container without testing or processing it • Recycle • To Clean refrigerant by oil separation with a single or multiple passes through replaceable core filter dryers.
Reclaim • To reprocess refrigerant to new product specs by means which may include distillation and chemical analysis.
Recovery Cylinders • Grey bodies with yellow tops • Hydrostatically tested and stamped every 5 years • Filled to 80% capacity • Evacuate the cylinder prior to its first use.
Montreal Protocol A document calling for controls on CFC and HFC refrigerants
ODP • Ozone depletion potential • R134a 0 ODP • Global Warming Potential.
Venting • Releasing refrigerant • 3 Types of permitted releases • De Minimus • Normal operation • R22+Nitrogen / Leak testing.
Recovery Equipment • Tested under ARI 740 • $27,500 per fine per day • $10,000 Reward.
Blended Refrigerants • Blend fractionation • When the blend refrigerant leaks in uneven amounts due to different vapor pressures • Azeo tropic blends---500 refrigerants • Zeotropic refrigeratns---400 refrigerants.
Leak Testing • EPA—125psig • General area ---- electric or ultrasonic • Pinpoint---- Bubbles.
Safety Classifications A1 Most Safe ----almost all refrigerants A3 Least Safe B1 Toxic------R123 B3 Most Toxic.