Intelligent Heat Management
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BMW Innovation Days : Intelligent Heat Management—By BMW Group
For a long time every effort was made to avoid the build-up of heat in the car and, therefore, to prevent overheating of the car‘s components. But in recent years there has been a significant change in mind in the process of reducing CO2 emissions.
“Heat is a very valuable form of energy in the car largely still unused and not easy to properly exploit.” (Dr Johannes Liebl, Head of BMW EfficientDynamics)
A lot of residual heat is generated particularly in the engine, since even in a very efficient combustion engine only about one-third of the energy in the fuel consumed is actually converted into drive power. The other two-thirds are lost as waste heat going out into the environment through the exhaust gas and the radiator.
Use of this energy through intelligent heat management offers a great potential for reducing fuel consumption and, accordingly, CO2 emissions. While a small share of the thermal energy available is already used today (for example when warming up the engine or through exhaust gas turbocharging), further improvements for using such thermal energy would be able to reduce the car’s consumption once again by several percentage points.
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