Abstract
This article presents a power to SNG (synthetic natural gas) system that converts hydrogen into SNG via a methanation process. In our analysis, detailed models for all the elements of the system are built. We assume a direct connection between a wind farm and a hydrogen generator. For the purposes of our calculations, we also assume that the hydrogen generator is powered by the renewable source over a nine-hour period per day (between 21:00 and 06:00), and this corresponds to the off-peak period in energy demand. In addition, a hydrogen tank was introduced to maximize the operating time of the methanation reactor. The cooperation between the main components of the system were simulated using Matlab software. The primary aim of this paper is to assess the influence of various parameters on the operation of the proposed system, and to optimize its yearly operation via a consideration of the most important constraints. The analyses also examine different nominal power values of renewables from 8 to 12 MW and hydrogen generators from 3 to 6 MW. Implementing the proposed configuration, taking into account the direct connection of the hydrogen generator and the methanation reactor, showed that it had a positive effect on the dynamics and the operating times of the individual subsystems within the tested configuration.
Highlights
Introduction to Synthetic NaturalGas’ System.Nowadays, alternative opportunities are sought to enable efficient and environmentallyfriendly electricity generation due to the need to improve the quality of the natural environment by limiting the emission of harmful substances into the atmosphere, water and soil [1]
This article proposed a power to SNG system that converts electricity from a renewable energy source into chemical energy that is stored in synthetic natural gas
To the standard configuration of the H2 generator-gas buffer-methanation reactor, an additional connection was included that acts between the water electrolysis installation and the methanation reactor in the form of a bypass, which operates when the H2 tank is at full capacity
Summary
Introduction to Synthetic NaturalGas’ System.Nowadays, alternative opportunities are sought to enable efficient and environmentallyfriendly electricity generation due to the need to improve the quality of the natural environment by limiting the emission of harmful substances into the atmosphere, water and soil [1]. Any new developments in the energy sector usually strongly support the gradual reduction of electricity generation that relies on fossil fuels in favor of installations that use renewable energy sources (RES) In recent years, this requirement has led to the continuous increase in energy systems with the capacity of RES installed [2,3,4]. This requirement has led to the continuous increase in energy systems with the capacity of RES installed [2,3,4] Renewable systems, such as wind farms or solar panels, are typically characterized by a variation in the amount of electricity produced due to their dependence on the current weather conditions [5]. Their main task is to store surplus electricity during its excess production and feed it back into the grid when current demand exceeds the viable production capacity in the electricity network
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