IMPROVING THE EFFICIENCY OF A SERIAL HYBRID POWERTRAIN FOR CITY BUSSES USING AN ICE WASTED HEAT ENERGY THROUGH COMPRESSED AIR SYSTEM

Željko Hederić; Miralem Hadžiselimović; Nenad Cvetković; Dejan Barešić

Scientific paper ID 1539 : 2017/2

IMPROVING THE EFFICIENCY OF A SERIAL HYBRID POWERTRAIN FOR CITY BUSSES USING AN ICE WASTED HEAT ENERGY THROUGH COMPRESSED AIR SYSTEM

Željko Hederić, Miralem Hadžiselimović, Nenad Cvetković, Dejan Barešić

Improve model of the standard serial hybrid powertrain for city busses is presented. In classic topology recovered braking energy returns through the motor in the battery system. A combination of solutions with the compressed air as a dynamic reservoir for the recuperation of braking energy and the use of ICE waste heat energy as an energy booster is improved of design. The waste heat energy of ICE, that represents 65% of the consumed fossil fuels potential energy, is transferred to compressed air high-pressure vessel and by adiabatic process total energy is raised. Simulation results show that recuperated WHE can be transformed into mechanical energy up to 20% of fossil fuels potential energy. Improve design provides a rise of system efficiency to up 40%. Thus ultimately provides a total reduction of fuel consumption by over 37,5% compared to the standard topology of SHEV. The advantage of the presented system is that it reused WHE produced by ICE, so the overall efficiency of the SHEV power drive is increased and CO2 emissions are reduced.

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serial hybrid powertrain ICE-internal combustion engine WHE-waste heat energy CAES-compressed air energy storage adiabatic processсерийна хибридна задвижваща система двигатели с вътрешно горене енергия от отпадъчна топлина капацитет за съхранение Željko Hederić Miralem Hadžiselimović Nenad Cvetković Dejan Barešić

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