Experimental investigation of the Exhaust Gas Recirculation effects on irreversibility and Brake Specific Fuel Consumption of indirect injection diesel engines

An experimental study was carried out to investigate the effect of using Exhaust Gas Recirculation (EGR) on various exergy terms of an IDI diesel engine cylinder. In this paper also the effectiveness of total in-cylinder irreversibility on Brake Specific Fuel Consumption (BSFC) in a diesel engine is...

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Bibliographic Details
Published in:Applied thermal engineering 2010-09, Vol.30 (13), p.1711-1718
Main Authors: Ghazikhani, M., Feyz, M.E., Joharchi, A.
Format: Article
Language:English
Subjects:
Applied sciences
Availability
Brakes
BSFC
Cylinders
Diesel engine
Diesel engines
EGR
Energy
Energy. Thermal use of fuels
Engines
Engines and turbines
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Exergy
Exhaust
Fuel consumption
Heat transfer
Irreversibility
Theoretical studies. Data and constants. Metering
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Summary:An experimental study was carried out to investigate the effect of using Exhaust Gas Recirculation (EGR) on various exergy terms of an IDI diesel engine cylinder. In this paper also the effectiveness of total in-cylinder irreversibility on Brake Specific Fuel Consumption (BSFC) in a diesel engine is investigated. To serve this aim an exergy analysis is conducted on the engine cylinder which provides all the availability terms by which the evaluation of in-cylinder irreversibilities is possible. The availability terms including heat transfer, inlet and exhaust gases and work output are presented during the engine operation at different load and speeds. To clarify the effect of using EGR in each case, EGR is introduced to the cylinder at various ratios during the tests. Finally, the dependence of total in-cylinder irreversibility and engine BSFC at particular engine operating conditions is introduced and the variations are compared. The results show that using EGR mostly increases the total in-cylinder irreversibility mainly due to extension of the flame region which reduces maximum combustion temperature. Also, the results revealed that the variations of the total in-cylinder irreversibility and engine BSFC follow the same trend especially at high load conditions.
ISSN:1359-4311
DOI:10.1016/j.applthermaleng.2010.03.030