Technical Paper
A Novel Option for Direct Waste Heat Recovery from Exhaust Gases of Internal Combustion Engines
2020-06-30
2020-37-0004
Among the different opportunities to save fuel and reduce CO2 emissions from internal combustion engines, great attention has been done on the waste heat recovery: the energy wasted is, in fact, almost two thirds of the energy input and even a partial recovery into mechanical energy is promising. Usually, thermal energy recovery has been referred to a direct heat recovery (furtherly expanding the gases expelled by the engine thanks to their high pressure and temperature) or an indirect one (using the thermal energy of the exhaust gases - or of any other thermal streams - as upper source of a conversion power unit, which favors a thermodynamic cycle of a suitable working organic fluid).