Abstract
The exhaust heat exchange coefficient in a pipe of Internal Combustion Engine has been measured with a specific exhaust-air heat exchanger. Its installed on the exhaust line of IC Engine. The Nusselt-Reynolds correlation has been developed and compared to the steady state conditions known Colburns correlation. The Convective Augmentation Factor (CAF) is approximately 2 at low Reynolds number and 1 at high Reynolds number. The technology of EGR cooler and the exhaust-coolant heat exchanger for improving the thermal comfort have been shown. A vehicle equipped with a Direct Injection Turbo Diesel Engine has been tested in the climatic wind tunnel. The heat performance in the passenger compartment will be presented.