A Promising High Efficiency RM-HCCI Combustion Proposed by Detail Kinetics Analysis of Exergy Losses Tianjin Univ

Format:

Conference/Event

Author/Creator:

Yan, Yan, author.

Contributor:

Su, Wanhua

Conference Name:

SAE 2015 World Congress & Exhibition (2015-04-21 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2015

Summary:

AbstractTo explore the exergy loss of engine combustion process, entropy generations were numerically analyzed through detailed chemical kinetics. It revealed that the reformed fuel with simpler molecular tended to produce lower combustion irreversibility. Furthermore, a promising high efficiency RM- HCCI (Reformed molecule HCCI) combustion principle was proposed. In a RM-HCCI engine, hydrocarbon fuels were reformed into small molecule fuels under high temperature and low/no oxygen atmosphere before injection into the cylinder when the exhaust gas enthalpy to a certain extent was recovered, further improving the engine efficiency. The second law efficiency (η2nd) of a RM-HCCI combustion with a CR of 10 can be increased from 36.78% to 45.47% by coordination of multiple control parameters, and to 67.79% by raising CR from 10 to 100. The RM-HCCI has many advantages: (1) less exergy losses during combustion processes, (2) longer ignition delays and shorter but controlled combustion durations, (3) improved ratio of specific heats, all these advantages can improve engine efficiency

Notes:

Vendor supplied data

Publisher Number:

2015-01-1751

Access Restriction:

Restricted for use by site license