Abstract
Biogas from renewable sources and natural gas (NG) are both high-efficient and good-quality gaseous fuels on account of their enrichment in methane.Due to the dissimilar physical properties of biogas and NG,biogas cannot substitute NG directly without treatment and is usually used on site due to the high cost of the transportation and distribution via exclusive pipeline system.Consequently,the injection of biogas into existing NG infrastructure was proposed to address the deficiency.In this paper,the Wobbe index (WI) as well as the combustion potential (CP) were introduced for analyzing the interchangeability of an NG-biogas mixture,and a mathematical framework was put forward for modeling and simulating NG grid with a decentralized biogas injection.Results show that the maximum admissible amount of biogas in mixture was 10.5％ by volume.A medium pressure network was used to interrogate the comprehensive effect of distributed biogas injection,which showed an impact on both gas quality and hydraulic regime across the grid.
基金项目
Funded by China 12th Five-year Plan Key R&D Program(2013BAJ11B05)
NETL
NSTL
维普
万方数据