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Koura submits CO2 alternative for ASHRAE approval

UK: The unusual component blend of a new non-flammable refrigerant from Koura, which it claims has a lower environmental impact and better performance than CO2, has now been revealed.

First announced last year and dubbed LFR3, Koura claims the new refrigerant will be suitable for a range of cooling applications including mobile air conditioning, heat pump systems, cold chain and transport refrigeration and commercial refrigeration.

The refrigerant, which is said to be up to 20% more energy efficient than CO2 with 15-20% lower operating pressure, has now been submitted to ASHRAE for designation and safety classification.

The new gas is, itself, 69% CO2 with the addition of 21% R32 and 10% R1132a. According to Koura, the combination makes LFR3 non-flammable – the CO2 suppressing the flammability of the other two components. These blend proportions also give LFR3 a GWP of 143 under AR4, tucking it neatly under the 150 GWP refrigerant limit now in place in Europe for certain applications.

A GWP of less than 150 is required under the MAC regulations for vehicle air conditioning systems and, since January 1, the European F-gas regulations have placed the same limit on new hermetically-sealed commercial refrigerators and freezers and multipack centralised commercial refrigeration systems with a rated capacity of 40kW or more. The US Environmental Protection Agency is also said to be considering a similar national regulation that may take effect in 2024.

The R1132a molecule features in a number of other new Koura developments including R473A, its recently released low GWP alternative to R23 in ultra low temperature applications.

Koura targets CO2 with new refrigerant22 February 2021
UK: Koura claims that a new alternative to CO2 could provide greater efficiencies and lower operating pressures in mobile air conditioning systems and domestic heat pumps. Read more…

New refrigerant options await ASHRAE approval 20 June 2021
USA: With seemingly no let up in refrigerant developments, eight new gases have been submitted for ASHRAE 34 classification, in addition to two refrigerants from Honeywell and Chemours receiving R-numbers. Read more…

Koura’s R473A brings lower GWP for ultra-low temps29 January 2021
USA: Refrigerant manufacturer Koura has launched a refrigerant with a significantly lower GWP than existing HFCs currently being used in ultra-low temperature cooling applications. Read more…

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