• Herbert Siahaan
• Armansyah Halomoan Tambunan
• Desrial
• Soni Solistia Wirawan

Biogas has been widely used as a petrol fuel alternative in internal combustion engine. As a carburetor, the helical barrier as an air-fuel mixer system has been designed with thermodynamic and fluid dynamics analysis to improve the quality of the mixture according to combustion requirements. The calculation result of the 4-step Otto cycle at a compression ratio of 8.5 obtained a gas flow rate of 0.135 g/s which is used as the basis for calculating the venturi and helical barrier. Then a simulation has been carried out using biogas digester fuel and according to the dimensional data of the engine being referenced. Simulation results that the helical barrier can be used to improve combustion performance and show the quality of air-biogas mixture in the improvement process compared to non-helical barrier. Thermodynamic simulation results, combustion of air-biogas mixture at a distance of 39 mm helical barrier can increase thermal efficiency by 1.29% and also combustion energy by 5%. This shows that the length of the helical barrier is best for use according to the capacity of the engine specifications.

Biogas, helical barrier, mixture quality, combustion

"Performance Simulation of An Air-Biogas Mixing Device Equipped With Helical Barrier", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 8, page no.16-20, August-2020, Available :http://www.jetir.org/papers/JETIR2008303.pdf

"Performance Simulation of An Air-Biogas Mixing Device Equipped With Helical Barrier", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 8, page no. pp16-20, August-2020, Available at : http://www.jetir.org/papers/JETIR2008303.pdf