Desempenho do conjunto motogerador a biogÃs / Acting of the group adapted motorcycle generator biogas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The present work was conducted in the Unity of Production and Use of Biogas, at the Universidade Federal de Lavras. Its objective was to develop and to evaluate the biogas powering system of a 4 -timing stationary motor with 4077W nominal potency to a 4200 rpm rotation,, coupled to a generator of 2400W with operational rotation of 3600rpm. The experiments were accomplished with a gasoline operating motor on its original version and adapted for biogas. The used biogas was produced in a biodigestor Indian model starting from bovine manure, containing, an average of 63% of methane. For all the experiments, it was measured the rotations and the consumption of the motor, besides the tension and generated current to feed the three resistive potencies equal to 1000, 1200 and 1500W. For the motor-generator group using gasoline in its original version, it was observed a medium potency of 840,2W with medium tension of 109 volts and medium efficiency of the group of 12,14%. For the motor-generator operating with biogas, it was experienced two carburetion options: one with the venturi-type carburetor especially calculated, in which the generated medium potency was of 859,7W with medium tension of 103volts and medium efficiency of 6,71%; and the other with the original carburetor of the adapted motor to operate with biogas. They were experienced with the adapted original carburetor, operating with the spark-plug on the normal position and with the spark-plug on the advanced position, being observed respectively, a generated medium potency of 795,40W, medium tension of 99,10 volts and medium efficiency of 6,56% against a medium potency of 934,59W, medium tension of 100,90 volts and medium efficiency of 8,22%. This last one had the best performance for the biogas operating machine, which was obtained by moving the spark-plug to + 4,82o in relation to the original position.

ASSUNTO(S)

combustÃvel alternativo; motor a combustÃo; carburador; energia gerada; avanÃo de centelha alternative fuel; combustion engine; carburetor; generated energy; moving the spark-plug motores alternativos

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