Analysis of Recoverable Exhaust Energy from a Light-Duty Gasoline Engine
نویسندگان
چکیده
While EER (Exhaust Energy Recovery) has been widely pursued for improving the total efficiency and reducing CO2 emissions of internal combustion engines, the maximum regenerated power from the exhaust energy has been proposed and calculated in terms of endoreversible cycle. In this paper, based on the experimental data of an EER system installed on a light duty gasoline engine, the exhaust energy and maximum recoverable energy were analysed, by defining a new parameter of the recoverable exhaust energy efficiency (the fraction of maximum recoverable exhaust energy in the total fuel energy) for reflecting the available energy of exhaust energy in all mentioned engine operating conditions. Combining those experimental and modelling data, results show the engine exhaust gases temperature increases with both of the speed and load in the overall operating conditions of vehicle, ranging among 400oC and 850oC. With water as the working fluid for the EER system, the recoverable exhaust energy efficiency ranges among 5% and 21% under different engine operating condition and it could be up to 19% in a rather wide load range under general engine operating speed.
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