Thermal Management Air conditioning

R-744 Standard Heat Pump

Last update: 28 Aug. 2023

What is an R-744 Standard Heat Pump?

Valeo is strongly committed to sustainable development and environmental protection: it was the first equipment supplier to promote R-744 Standard Heat Pump (natural refrigerant), winning a PACE Award in 2017 for this innovative technology. (PACE: Premier Automotive Suppliers’ Contribution to Excellence).

R-744 (CO₂) Refrigerant has a significantly lower climate impact than fluorinated refrigerants (R-134a or R-1234yf). It also offers more power and efficiency at extreme cold temperatures (-18°C) thanks to its thermodynamic properties. It is the most efficient way of heating an electric vehicle in cold conditions.

Since 2019, Valeo supplies one of the largest global electrical OEM platforms with specific R-744 heat exchangers for Heat Pump :
Ensuring comfort in cabin thanks to an R-744 Evaporator and an R-744 Inner-Gas Cooler, while cooling the battery thanks to an R-744 Chiller connected to XL battery plate cooler.

Finally, anticipating on the potential P-FAS refrigerant ban in Europe, Valeo has launched the next generation of R-744 components for the heat pump system, developed and produced in-house (Heat Exchangers, Electrical Driven Compressor, Electronic Refrigerant Valves, etc…).

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R-744 Standard Heat Pump benefits

Efficient Heating (COP 3.6 at -7°C for 6kW)
Gain 70km (+30%) at -7°C for 70kWh battery (WLTP)

R-744 Standard Heat Pump specifications

Natural Refrigerant
Up to 7.8 kW heating capacity at -20°C
Same cooling capacity as R1234yf at+35°C (Valeo technology)
Possible to cool up to 11.5 kW at+35°C for Ultra Fast Charge (Valeo Patent)
R744 Heat Exchangers: Evaporator, Inner-GasCooler, Outer-GasCooler, Water-GasCooler, IHX, Chiller
R744 Electronic Expansion Valves (CEO: Close Expansion Open)