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

Abstract

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.

Experimental Investigation of the Performance and Spray Characteristics of a Supersonic Two-Phase Flow Ejector with Different Structures

“…A large number of studies have shown that a proper ejector can significantly improve the performance of a system. Zhou et al [4] introduced a mixer-ejector, and they put forward a minimum injection pressure of 0.25 MPa to ensure the methane/air mixer-ejector works normally. Chandra and Ahmed [5] as well as Hu et al [6] concluded that a change in the geometric parameters of an ejector has a significant impact on the ejector performance.…”

A PESTLE Analysis of Biofuels Energy Industry in Europe

“…The objective of this report is to (1) summarise the key interdependencies in the biofuel industry based on PESTLE analysis and (2) create a review in which the key biofuel production characteristics are correlated with the sustainability factors that are affected by the biofuel industry. Hereafter, the different aspects influencing the sustainability of bioethanol, biodiesel, and biomethane industry are determined and these are allocated to the economic, environmental, socioecological, and geopolitical facets [45][46][47][48][49][50][51][52][53][54][55]. Finally, both quantitative and qualitative data are assessed to correlate both aspects and determine the strengths and weaknesses of the different biofuel characteristics.…”