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Energies 2017, 10(11), 1902; doi:10.3390/en10111902

LNG–Air Mixture as a Supplementary Energy Injection into a Biogas Distribution Network

1
School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China
2
Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
3
Joint International Laboratory of Green Building and Built Environments, Ministry of Education, Chongqing University, Chongqing 400045, China
4
Department of Chemical and Environmental Engineering, University of Nottingham, Nottingham NG7 2RD, UK
*
Author to whom correspondence should be addressed.
Received: 21 October 2017 / Revised: 16 November 2017 / Accepted: 17 November 2017 / Published: 19 November 2017
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Abstract

Biogas production efficiency fluctuates with climate variations and agricultural arrangements, which pose a limiting factor upon its single supply to end users via a regional exclusive network, especially in peak demand. In this paper, an appropriate methodology to address the contradiction between biogas supply and demand is proposed. Methane conditioned by the addition of air is described, and can be a supplementary energy injected into a biogas distribution network. To accomplish the mixing process and also inject the exhaust mixture into the distribution system, a mixer–ejector was introduced and integrated into the biogas grid. Finally, the fundamental combustion behaviors of mixed gases were estimated through the analysis of flame appearance, contamination emissions, and the flame stability region. The results showed that the methane/air mixture with a mixing ratio ranging from 49/51 to 53/47 could interchange biogas commendably, and good combustion behavior was obtained on a typical biogas-burning appliance. View Full-Text
Keywords: biogas; methane; injection; interchangeability; combustion characteristics biogas; methane; injection; interchangeability; combustion characteristics
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Zhou, Y.; Peng, S.; Huang, X.; Wu, C.; Zhang, J. LNG–Air Mixture as a Supplementary Energy Injection into a Biogas Distribution Network. Energies 2017, 10, 1902.

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