Experimental investigation of the EGR temperature effects on performance of indirect injection diesel engines from the viewpoint of first and second law

In this study is carried out an experiment to investigate the effect of Exhaust Gas Recirculation (EGR) temperature on performance of an IDI diesel engine cylinder. To study engine performance energy and availability analysis is conducted on the engine cylinder which provides all the availability terms by which the evaluation of in-cylinder irreversibilities is possible. To clarify the effect of using EGR in each case, EGR is introduced to the cylinder at various ratios and temperature during the tests. The results show that using EGR mostly increases bsfc of diesel engine at full load. Also the results show that the increase of EGR temperature lead to the reduce combustion irreversibility. But On the other hand the increase of EGR temperature lead to increase destruction the fuel availability from heat transfer to cylinder wall and exhaust. So depend on the engine operation at different load and speeds, the increase of EGR temperature could be lead to a positive or negative effect on the performance engine. Specifically, for the conditions of this study, combustion irreversibility change due to EGR temperature change ranged between about -5 and 5% of the combustion irreversibility in condition without entering EGR.

کلیدواژه ها:

EGR (exhaust gas recirculation) ، first and second law analysis ، effect temperature ، diesel engine