MAHLE Unveils Heat Recovery System to Boost EV Winter Range

MAHLE has introduced an innovative heat recovery system designed to address one of electric vehicles' most significant winter challenges: reduced range due to cabin heating demands.

The German automotive supplier's HeatX Range+ system reduces energy consumption for air conditioning in electric vehicles by approximately 20 percent compared to conventional exhaust air systems. Testing conducted with a typical mid-size electric vehicle at -7°C outside temperature demonstrated a range extension of nearly 10 kilometers while maintaining a comfortable 20°C interior temperature.

The technology works by extracting heat energy from cabin exhaust air using the air conditioning evaporator. As air exits the vehicle, it heats the refrigerant, which then transfers stored energy to incoming fresh air, efficiently preheating it before entering the cabin. This process reduces heating power demand while maintaining consistent oxygen-rich air flow to prevent window fogging and ensure high interior air quality.

"Our HeatX Range+ heat recovery concept maximizes the everyday practicality of electric vehicles in winter and makes a decisive contribution to further increasing the attractiveness of electric mobility," said Martin Wellhoeffer, Member of the MAHLE Group Management Board responsible for the Thermal and Fluid Systems business unit.

The system's modular design allows manufacturers to integrate it into existing vehicle architectures with relative simplicity and cost-effectiveness. According to MAHLE, the heat recovery system does not negatively impact air flow performance or acoustic behavior of vehicle climate control systems.

MAHLE has previous experience in this area, having introduced the "Economizer" cabin heat recovery system concept for passenger and commercial vehicles in the 1990s. The current system is designed for R1234yf refrigerant and can be adapted to alternative refrigerants with minor modifications.

Dr. Uli Christian Blessing, Vice President of R&D Thermal and Fluid Systems at MAHLE, emphasized the company's long-standing commitment to efficient cabin climate control, noting that the new technology builds on decades of development and manufacturing experience in vehicle climate control systems.