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Today, natural gas, with certain advantages over other fossil fuels, is one of the main energy resources for various industries and housing and communal services. As a rule, when choosing a gas transportation method for different categories of consumers, several options are considered depending on the mutual removal of the source and the consumer – construction of a gas pipeline or the creation of a liquefied gas infrastructure. Analysis of energy supply problems in some constituent entities of the Russian Federation showed that a reasonable choice of technological parameters of a gas distribution system based on liquefied natural gas (LNG) is an urgent task that requires preliminary modeling. The paper proposes a solution to a particular problem of supplying consumers with liquefied natural gas, a logistic model for the optimal functioning of the system for the complex: LNG plant – a consumer. Based on the results of calculations for the conditions of the Republic of Karelia, recommendations are proposed for the optimal location of the source (LNG plant) and optimization of the transport component.

The article presents the prospects of using biogas fuel. Mathematical model of processes proceeding at the gas purification in amine installation unit has been developed. A software package has been proposed that allows to determine the quantitative yield of methane, design and thermal insulation characteristics of a biogas reactor by anthropogenic load. We determine the main parameters and energy efficiency of the biogas plant for the conditions of the Saratov, efficiency of energy-saving measures at the biogas fuel usage is shown. The practical significance of the work lies in the use of the developed model in the design of anaerobic reactors on polygon of residential solid waste (RSW), small settlements and microdistricts distant from other sources of energy supply.