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- Path: sparky!uunet!gatech!purdue!mentor.cc.purdue.edu!noose.ecn.purdue.edu!en.ecn.purdue.edu!ghg
- From: ghg@en.ecn.purdue.edu (George Goble)
- Newsgroups: rec.autos.tech
- Subject: Re: Charging A/C with Freon
- Keywords: freon
- Message-ID: <1992Jul28.115032.671@en.ecn.purdue.edu>
- Date: 28 Jul 92 11:50:32 GMT
- References: <1992Jul20.153331.24083@bnr.ca> <1992Jul25.142149.25223@en.ecn.purdue.edu> <1992Jul28.001743.25184@eos.arc.nasa.gov>
- Followup-To: rec.autos.tech
- Distribution: na
- Organization: Purdue University Engineering Computer Network
- Lines: 39
-
- In article <1992Jul28.001743.25184@eos.arc.nasa.gov> jbm@eos.arc.nasa.gov (Jeffrey Mulligan) writes:
- >ghg@en.ecn.purdue.edu (George Goble) writes:
- >
- >>The largest single source of leaking CFCs are automobile A/C units.
- >>The world's 225 million A/C cars each leak around 1/2 lb of CFC-12
- >>each year on the average. The industrial solvent and foam blowing
- >>sectors have pretty much cleaned up their act by now.
- >>--ghg
- >
- >What about large air-conditioned buildings?
- >Are service personnel now required to recover all freon when servicing
- >these large units as they are with auto units?
- >
- >
- >--
- >
- > Jeff Mulligan (jbm@eos.arc.nasa.gov)
- > NASA/Ames Research Ctr., Mail Stop 262-2, Moffett Field CA, 94035
- > (415) 604-3745
-
- The refrigerant (if it an HCFC or CFC) has to be recovered (in the US)
- after July 1,1992. $25,000 fine for failure to do so, $10,000 "reward"
- for those who "turn you in" is possible.
-
- Many building systems use R-22, which is 0.05 the ozone depletion of R-12.
- Home central air and window units use R-22 also. Most building A/C systems
- don't leak like the cars. They do not use rubber hoses, and O-rings, and
- are built much better, and use brazed joints. Some chillers use R-11
- (same ozone depletion as R-12). Some of those are converting to R-123 now.
- R-11 is over $400 now for 100lb cans (last night's price). R-123 causes
- testicle tumors in rats at 300ppm. Human exposure limit is now 10ppm!
-
- Supermarkets are bad leakers in general. I read that the large supermarket
- has something 5 miles of refrigeration lines, and 16,000 brazed joints!
- They have a refrigerant charge of around 8,000lbs, mostly R-502, R-12, and
- maybe some R-22. (R-502 is a bad ozone depletor as well). They leak out
- about 1/3 to 1/2 of that charge every year! Refrigerant (Freon) is now the
- largest single operating expense for many supermarkets.
- --ghg
-