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B8016 SGGE 2020

Design of Small Single Cylinder 4 Stroke Spark Ignition Engine for Electric Generator with Flexible Fuel:

Biogas, Liquefied Petroleum Gas (LPG) or Gasoline

2020 2^ND INTERNATIONAL CONFERENCE ON SMART GRID AND GREEN ENERGI, Bali, Indonesia january 13-15 2020

David Lie^a, Tjokorda Gde Tirta Nindhia^b*, I Wayan Surata^b, Nengah Wirawan^b

a Master student at Study program of Master in Mechanical Engineering, Engineering Faculty, Udayana University, Jimbaran, Bali, Indonesia

b 2Study Program of Mechanical Engineering, Engineering Faculty, Udayana University, Jimbaran, Bali, Indonesia

Background

Purpose

This work is dedicated to solve this problem. The Single cylinder 4 stroke spark ignition engine (83 cc) is designed to be able to be fueled by using Biogas or Liquefied Petroleum Gas (LPG), or gasoline if sometime the biogas not available during initiation of the process or during maintenance of anaerobic digester, the engine is still can be run to provide electricity by using conventional fuel such as LPG or gasoline. The fuel consumption as well as emission will be investigated The available if conventional fuels are fluctuating depend on distribution from the source production to consumer. The availability of biogas as renewable energy is increase due to establishments of many organic wastes processing worldwide. The need of electricity to support daily life activity is a must, but the availability of electric source in remote area is limited especially for a farm that far away from commercial line distribution of electricity.

Experimental

The system can be run individually by using biogas, LPG, or gasoline. The engine is single cylinder with volume 83 cc with air cooled. The compression pressure is 10 bar. The biogas was desulfurized to eliminate the H₂S impurity in the biogas and moisture (H₂O) should also

eliminate. The final biogas composition of the biogas in this research was 66% vol. methane (CH₄) with 31% vol. of CO₂.

The emissions of the utilization 3 types of fuel were investigated and the fuel consumptions were measured for future economical analyses. The result was presented in graph and table of easy comparison and analyses.

Result and Discussion

The comparison of emission gases from utilization of biogas, LPG gas and gasoline as a fuel

Result and Discussion

Result and Discussion

Conclusion

Engine with flexible fuel of biogas, LPG gas, or gasoline is established in this work. The engine is single cylinder, 4 stroke, spark ignition, and air cooled, with cylinder volume 83 cc.

The best CO emission was found if biogas that is used as a fuel. The emission of carbon monoxide (CO) was down to almost zero (0.0 ppm), comparing gasoline 0.32 ppm, and LPG 0.4 ppm . The fuel consumption is 9.97 L/mint for Biogas, 0.004 L/mint for gasoline and 2.24 L/mint for LPG

Acknowledgement

This research was funded by Udayana University by grant research of PNBP for the years of 2020.