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Tag Archives: CFC
European Commission launches yet another study of R-1234yf refrigerant by Jacques Gordon So much and yet so little has happened over the past year. To review: 2006: The European Commission rules that as of January 2011, new-design vehicle platforms sold … Continue reading
There never has been and never will be just one In the mid 1750s, Ben Franklin experimented with using vacuum to evaporate liquid ether, and he recorded a significant temperature drop in the remaining liquid. About 100 years later, Australian … Continue reading
In the early 1970s, a curious lab chemist wondered what became of the chemicals used as propellants in aerosol cans when the contents were sprayed. Roughly 20 years later, the same scientist and his associate Mario Malina shared the 1995 Nobel Prize in chemistry, the “hole in the ozone layer” became common parlance, and the general population learned about the dangers of CFC chemicals, refrigerants and solvents. Continue reading
The chemical designation CFC, representing chlorofluorocarbons, should be familiar to anyone in this business. It’s the chemical used as the root of the old R-12 refrigerant that was phased out of mobile A/C use in the early to mid-1990s. Continue reading
1) What is HFO-1234yf?
HFO-1234yf is a chemical refrigerant that will be used in new cars in place of R134a.
The U.S. Environmental Protection Agency (EPA) has issued final approval for a new refrigerant for use in motor vehicle air conditioning systems that does not deplete the ozone layer, which helps protect the environment and people’s health. The new chemical, HFO-1234yf, may now be used in air conditioning for new cars and light trucks. When used appropriately, this chemical can reduce the environmental impact of motor vehicle air conditioners and has a global warming potential that is 99.7 percent less than the current chemical (HFC–134a) used in most car air conditioners.
Back in November, the U.S. Environmental Protection Agency (EPA) issued a significant new use rule, or SNUR, recognizing a new use for the chemical we know (or will know) as HFO-1234yf. The SNUR specifies that the substance must only be used as a refrigerant in new motor vehicles, and that any other use must first be approved by the EPA. Since the agency also stated that it believed the new refrigerant “may be hazardous to human health,” the SNUR also imposed some limitations on purchase and transport of the gas.
There is a rumor making the rounds that service shops are required by regulations to replace their SAE J2210 refrigerant recovery and recycling machines with the newer generation of equipment complying with SAE J2788.
This is not true.
Over the last few years, due to trends in styling, many newer cars do not have conventional grills up front. Very often, a closed panel resides, or the hood extends down to where a grill would have been. But all vehicles still depend on air passing through the radiator to provide engine cooling, and also for A/C system operation. Continue reading