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Exhaust Waste Heat Recovery Systems

Automotive Heat Recovery

A typical automobile converts only about one-quarter of its fuel’s energy content into useful power to move the vehicle. The remaining energy is consumed by a variety of irreversible losses dominated by waste heat dissipation through the radiator and engine exhaust. This inefficient use of fuel proves costly to the consumer and damaging to the environment. II-VI Marlow has provided prototype thermoelectric waste heat recovery subsystems and continues to develop technology to convert this wasted heat energy into useful electrical power.  

In this process, thermoelectric generators (TEGs) convert heat extracted from hot exhaust gases into electrical power, which can then be used to power the electrical systems in the car or recharge the battery. As thermoelectric efficiency is a function of temperature difference, the high temperatures of automobile engine exhaust allow a thermoelectric device to yield the optimum conversion efficiency.

By utilizing the wasted thermal energy that is normally exhausted to the atmosphere, II-VI Marlow waste heat recovery technology enables automakers to reduce the size of the alternator currently used to generate a vehicle’s electrical power. This makes the engine more efficient, consuming less fuel and decreasing its negative impact on the environment.

For additional information, please visit our Power Generation Center.