Maximizing Volumetric Efficiency of a Diesel Engine Using an Air Pump to Compress Air-Biogas Mixture into the Engine via Venturi

Abstract:

This paper presents the effect of using a modified air pump to compress the mixture of air and biogas into a single cylinder diesel engine. The crankshafts of both were modified such that two equal size sprockets could be fastened to them. A toothed belt was used to synchronize the crank positions of the pump and diesel engine. By adjusting the angular positions of the crankshaft of the pump at 205 degrees in advance compared to the angular positions of the crankshaft of the diesel engine, the maximum volumetric efficiency of 99.95% could be achieved at 1200 rpm. And when supplementing diesel fuel with biogas via the large venturi, the consumption of 50 cc. of diesel extended to 194.18% at 1200 rpm as compared to running the engine with 50 cc. of diesel alone.

• Periodical: Applied Mechanics and Materials (Volumes 148-149)
• Pages: 1051-1057
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.148-149.1051
• Online since: December 2011
• Authors: Kitti Wichettapong, Sujin Bureerat
• Keywords: Maximizing Volumetric Efficiency, Modified Air Pump, Multi-Hole Venturi, Multi-Inlet Mixer, Venturi-Induced Biogas Flow

References

[1] T. Wongwuttanasatien, K. Wichettapong, Reduction in emission of biogas released from a small pig farm in Thailand, IASTED, Canada, 6-8 July (2009) 150-152.

[2] A. Bonnick, Automotive Science and Mathematics, Published by ELSEVIER, (2008)184.

[3] M. Poschl, S. Ward, P. Owende, Evaluation of energy efficiency of various biogas production and utilization pathways, Applied Energy 87(2010) 3305-3321.

DOI: 10.1016/j.apenergy.2010.05.011

[4] P. Kaparaju., M. Serrano., I. Angelidaki, Optimization of biogas production from wheat straw silage in UASB reactor, Applied Energy 87 (2010) 3305-3321.

DOI: 10.1016/j.apenergy.2010.06.005

[5] K. Wichettapong, T. Wongwuttanasatien, Increasing Venturi-assisted inlet flow of biogas into dual-fuel engine, ITC-CSCC, 5-8 July (2009) 12-14.

[6] Dual-Fual (Biogas+Diesel) Development Project, Energy Research and Development Institute, Chaing Mai University, Chiang Mai, Thailand, (2007).

[7] S. Malison, Development of knock control system for a multipurpose diesel engine in agriculture using biogas as dual-fuel, Graduate school, Department of Mechanical Engineering, Faculty of Engineering, Chaing Mai University, (2009).

[8] P. Niyogi, S.K. Chakrabartty and M.K. Laha, Introduction to Computational Fluid Dynamics, Dorling Kindersley (India) Pvt. Ltd. (2006).

[9] M.L. Mason, L.E. Putnam, R.L. Re, The effect of Throat Contouring on Two Dimensional Converging Diverging Nozzle at Static Condition, NASA TP 1704, (1980).