PartagerCertains HFO ont un GWP inférieur à celui du CO2 (en anglais)
L'agence américaine de protection de l’environnement (EPA) a évalué de nouveaux HFO comme ayant un potentiel de réchauffement planétaire (PRP-GWP) similaire ou inférieur à celui du CO2 .
US EPA has evaluated new HFO refrigerants as having similar or lower global warming potential than CO2.
R1234yf, R1234ze and R1233zd are amongst a number of fluorinated greenhouse gases and fluorinated heat-transfer fluids being added to the Environmental Protection Agency’s Greenhouse Gas Reporting Rule. The changes are designed to increase the completeness and accuracy of the carbon dioxide equivalent emissions calculated and required to be reported by suppliers and emitters.
Against the baseline GWP of 1 for CO2, R1234yf has been assigned a GWP of just 0.31.
R1234ze(E), an alternative for R134a in chillers and other stationary equipment, has been assigned a GWP of 0.97. R1234ze(Z), for high-temperature heat pumps, has a GWP of 0.29.
R1233zd(E), a possible replacement for R123 in centrifugal chillers and previously carrying a GWP of 6, has received a reduced GWP rating of 1.34.
Earlier this year, the Intergovernmental Panel on Climate Change (IPCC), was the first to confirm that both R1234yf and R1234ze(E) had GWPs less than 1, putting their environmental impact below that of carbon dioxide. R1234yf had previously been calculated to have a GWP of 4 and 1234ze and 1233zd as having GWPs of 6.
The final rule was effective on 1 January 2015.
R1234yf, R1234ze and R1233zd are amongst a number of fluorinated greenhouse gases and fluorinated heat-transfer fluids being added to the Environmental Protection Agency’s Greenhouse Gas Reporting Rule. The changes are designed to increase the completeness and accuracy of the carbon dioxide equivalent emissions calculated and required to be reported by suppliers and emitters.
Against the baseline GWP of 1 for CO2, R1234yf has been assigned a GWP of just 0.31.
R1234ze(E), an alternative for R134a in chillers and other stationary equipment, has been assigned a GWP of 0.97. R1234ze(Z), for high-temperature heat pumps, has a GWP of 0.29.
R1233zd(E), a possible replacement for R123 in centrifugal chillers and previously carrying a GWP of 6, has received a reduced GWP rating of 1.34.
Earlier this year, the Intergovernmental Panel on Climate Change (IPCC), was the first to confirm that both R1234yf and R1234ze(E) had GWPs less than 1, putting their environmental impact below that of carbon dioxide. R1234yf had previously been calculated to have a GWP of 4 and 1234ze and 1233zd as having GWPs of 6.
The final rule was effective on 1 January 2015.