Federal and state regulations for fuel economy and emissions of passenger cars, light- and heavy-duty trucks, and buses have been grabbing headlines for decades. Meanwhile, a quieter revolution has been underway in the transport refrigeration sector.
The Montreal Protocol on Substances that Deplete the Ozone Layer was the root cause of the Clean Air Act, which required the U.S. Environmental Protection Agency to undertake actions to reduce the use of chlorinated refrigerants. The recent Kigali Amendment adds the most widely used replacements for chlorinated refrigerants to the list of substances to be phased down under the Montreal Protocol.
As legislation ramps up, the next generation of refrigerants and cooling technologies that do not use conventional compressor lubricants are shaping the future of refrigerated transportation by road vehicles, intermodal containers and ships.