Potential of Exhaust Energy Use for Charge Air Cooling in Supercharged Diesel Engines Technische Universitaet Berlin

Format:

Conference/Event

Author/Creator:

Kadunic, Kadunic, author.

Contributor:

Kipke, Peter

Wiedemann, B. (Bernd)

Conference Name:

SAE Brasil 2010 Congress and Exhibit (2010-10-05 : Sao Paulo, Brazil)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

A rough estimate of the energy components in internal combustionengines for motor vehicles indicates that the total fuel energy isconverted to one-third each into mechanical energy, engine coolantheat and exhaust energy. This large share of waste heat in theexhaust motivates various attempts to recover the remaining exergyin the exhaust. Intensifying charge air cooling by anexhaust-heat-driven cooling system provides a promising approach toengine waste heat recovery. The exhaust energy is most suitable forthis recovery effort due to its higher temperature level incomparison to engine coolant.A further decreasing of charge air temperature provides anadditional degree of freedom, which expands the boundariesconcerning engine application. In diesel engines, this intensifiedcharge air cooling decreases cylinder temperature level, which canbe used to reduce nitrogen oxide emissions in the raw exhaust atconstant brake efficiency or vice versa to improve brake efficiencyat constant nitrogen oxide emissions. Simulation results from thediesel engine described in this paper show a decrease of nitrogenoxide emission up to 37% at constant brake efficiency. Leaving thelevel of nitrogen oxide emissions unchanged led to an increase ofthe brake efficiency up to 4.7%

Notes:

Vendor supplied data

Publisher Number:

2010-36-0478

Access Restriction:

Restricted for use by site license