Steady state performance of spark ignition engines endowed of exhaust energy recovery University of Palermo

Format:

Book

Conference/Event

Author/Creator:

Pipitone, Emiliano, author.

Contributor:

Caltabellotta, Salvatore

Conference Name:

Conference on Sustainable Mobility (2020-10-04 : Catania, Italy)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2020

Summary:

As is known, internal combustion engines based on Otto or Diesel cycles cannot complete the expansion process of the gas inside the cylinder, thus losing a relevant energy content, in the order of 30% of total. The residual energy of the unexpanded gas has been partially exploited through the use of an exhaust gas turbine for turbocharging the internal combustion engine (with overall efficiencies of 20-30%), even in the "turbo-compound" configuration used for naval application, where a second turbine is employed downstream the first to further increase the energy recovery. If efficiently recovered by the use of a properly designed expander, the energy content of unexpanded in-cylinder gas could substantially contribute to increase the overall efficiency of a hybrid vehicle. In the present paper the authors propose a new hybrid propulsion system based on a spark ignition engine endowed of an exhaust gas energy recovery expander connected to a proper generator, and its steady state energetic performance are evaluated.As result, the efficient recovery of the unexpanded gas energy has the potential to increase the overall efficiency of the propulsion system by 10-15%, depending on the characteristics of the thermal engine and of the exhaust energy expander

Notes:

Vendor supplied data

Publisher Number:

2020-24-0012

Access Restriction:

Restricted for use by site license