STUDY OF PERFORMANCE OF S.I.E. WORKED WITH SUPPLEMENTARY METHANE TO LPG

Abstract

This paper include study of performance of single cylinder, 4-stroke spark ignition Ricardo E6, with variable compression ratio, spark timing and equivalence ratio, worked by supplemented methane to LPG.The speed of 25 rps and higher useful compression ratio were chosen in studying the effect of wide range of equivalence ratios and spark timing.The results showed that HUCR for mixture of two gases was differ from mixture ratio to other. The brake power when operated with LPG was higher than when it was working with methane, and when mixing two fuels the brake power decreased and became lower than that when working with LPG. The equivalence ratio at which the brake power got its highest value was between (Ø=1-1.2) when mixing the two fuels. The results showed that it can be worked with very lean equivalence ratios with supplementary methane, the indicated thermal efficiency increased also, and the brake specific fuel consumption reduced when methane volumetric ratio increased.