Tag Archives: petrol

1190-1199 M. Pexa, J. Čedík, B. Peterka and M. Holůbek
The operational parameters and emissions of portable generator after long-term operation on n-butanol
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The operational parameters and emissions of portable generator after long-term operation on n-butanol

M. Pexa, J. Čedík*, B. Peterka and M. Holůbek

Czech University of Life Sciences Prague, Faculty of Engineering, Department for Quality and Dependability of Machines, Kamýcká 129, CZ165 21 Prague 6, Czech Republic
*Correspondence: cedikj@tf.czu.cz

Abstract:

The utilization of biofuels in spark ignition and compression ignition engines is the trend of the recent time. The great expectations are inserted into n-butanol as a fuel, especially for spark ignition engines. The short time use of n-butanol in the SI (spark ignition) combustion engine does not make a big problem (start of the cold engine, change of the air-fuel ratio). The purpose of this contribution is the effect of long-term use of n-butanol as a fuel for SI engine. For this purpose the small portable generator was used. The harmful emissions, fuel consumption and power of the generator was measured then the generator was operated for 300 hours on 100% n-butanol with 80% of nominal load and the measurement was repeated. The generator was loaded with adjustable electrical resistance. As a reference fuel the petrol BA 95 with no bio-component was used. During the operation on n-butanol no technical problems occurred with the generator. After 300 hours of operation on n-butanol the performance parameters slightly decreased with little impact on production of harmful emissions components.

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1162–1169 B. Peterka,, M. Pexa, J. Čedík, D. Mader and M. Kotek
Comparison of exhaust emissions and fuel consumption of small combustion engine of portable generator operated on petrol and biobutanol
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Comparison of exhaust emissions and fuel consumption of small combustion engine of portable generator operated on petrol and biobutanol

B. Peterka¹,*, M. Pexa¹, J. Čedík¹, D. Mader¹ and M. Kotek²

¹ Czech University of Life Sciences Prague, Faculty of Engineering, Department for Quality and Dependability of Machines, Kamycka 129, CZ165 21 Prague 6, Czech Republic
² Czech University of Life Sciences Prague, Faculty of Engineering, Department of Vehicles and Ground Transport, Kamycka 129, CZ165 21 Prague 6, Czech Republic
*Correspondence: peterka@oikt.czu.cz

Abstract:

The paper is focused on the comparison of exhaust emissions and fuel consumption of small internal combustion engines operated on petrol and biobutanol. In case of this research, small engines are represented by combustion engine of portable power generator with nominal power of 4.8 kW equipped with carburettor for fuel mixture preparation. Exhaust emissions and fuel consumption were measured while gradual loading of the combustion engine. BrainBee emission analyser, Bruker FTIR spectrometer and EEPS particle analyser was used for the measurement. The mass fuel consumption was monitored using laboratory scale Vibra. The initial hypothesis expected that exhaust emissions and fuel consumption will be higher in case of use of nonstandard fuels. From the viewpoint of particles count can be stated, that their productions are at very low level for both kinds of used fuels. Production of carbon monoxide and hydrocarbons is higher than in case of usual automobile engine due to simple engine control system and absence of additional emission control device (catalytic converter). The fuel consumption increased while using n-butanol as a result of its lower calorific value.

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