Japanese authorities have decided that HFOs 1234yf, 1234zeE and 1233zdE should not be subject to the fluorocarbons emissions control legislation, which strictly regulates their use, recovery and destruction.
A new line of HFC based air-water heat pumps has been introduced, providing high level performance ratings, a SCOP value of up to 3.38 and a ESEER (European Seasonal Energy Efficiency Ratio) in cooling up to 4.28.
An Italian supermarket has replaced the medium-temperature refrigerant R-404A (GWP = 3,922) of a R-404A/CO2 cascade refrigeration system by the lower GWP refrigerant blend R-449A (GWP = 1,397) – composition HFC-32 /HFC-125 /HFO-1234yf /HFC-134a, 24.3/24.7/25.3/25.7 % by weight.
Comparing lower GWP alternatives for a 10 kW R-410A Heat pump, a study carried on by the IIR Working Group on LCCP Evaluation concluded that blends of HFC-32 with HFOs had a lower LCCP than HFC-32 or propane R-290.
A new concept for polyurethane foams discontinuous panels, which are used for cold storage insulation, has been validated with the use of HFO-1233zd as blowing agent, and implemented for industrial production.
In its recent report “Survey of selected fluorinated greenhouse gases”, the Danish Environment Protection Agency 2015 takes into account the qualities of HFCs, mentioning that “Generally F-gases are gases or volatile liquids at room temperature, thermal and chemical stable, with very low toxicity and with favourable environmental profile apart from their global warming potential”.
Following trials to replace high GWP blends R-404A and R-507 (GWP of respectively 3,922 and 3,985) which showed that R-449A (GWP of 1,397, or 65% lower) was an energy efficient alternative, a Dutch retail group has converted 200 of its supermarkets to R-449A.
The U.S. Air Conditioning, Heating and Refrigeration Institute (AHRI) has set up a subcommittee to conduct a review of the safety issues around mildly flammable refrigerants, to complete the necessary research, and share the results with regulators and standard developers.
The worldwide producers of fluorocarbons, known as the Global Fluorocarbon Producers Forum (GFPF), has launched an informational website to better communicate its objectives to key stakeholders around the world.
In anticipation of the F-Gas Regulation 517 (2014) which will ban HFCs with a GWP higher than 2,500 by 2020 in stationary refrigeration equipment, new blends having a lower GWP alternative to R-404A (GWP of 3,922) continue to be introduced for specific applications.