Projecting cost development for future large-scale power-to-gas implementations by scaling effects

Abstract

Power-togas (PtG) is widely expected to play a valuable role in future renewable energy systems. In addition to partly allowing a further utilization of the existing gas infrastructure for energy transport and storage, hydrogen or synthetic natural gas (SNG) from electric power represents a high-density energy carrier and important feedstock material for further processing. This premise leads to a significant demand for large-scale PtG plants, which was evaluated with an amount of up to 14.2 TWel at a global scale. Together with the upscaling of single-MW plants available today, this will enable to achieve appropriate cost reduction effects through technological learning. These effects were evaluated in the present paper via a holistic techno-economic assessment of different PtG plant configurations, resulting in the reduction of SNG production costs down to 100 €/MWhSNG by 2030 and below 60 €/MWhSNG by 2050, according to the supplying electricity source.

Durability of a recombination catalyst-based membrane-electrode assembly for electrolysis operation at high current density

“…The transition from fossil fuels to renewable energy sources (RES) requires developing efficient and high energy density energy storage systems [1][2][3][4][5][6][7][8]. Water electrolysers represent nowadays a suitable technology to better integrate renewables and to comply with their discontinuity by providing grid-balancing service [9][10][11][12][13][14].…”

Seasonal Energy Storage Potential Assessment of WWTPs with Power-to-Methane Technology

“…According to Section 2.4.1, total seasonal energy storage potential can be calculated on the basis of the higher heating value of the injected gas. Based on the stoichiometry, the values of E and E' are calculated as follows: An important statement of the financial analyses of the STORE&GO project is that a high range of possible investment costs of electrolyzers and methanation systems can be seen in the literature [44]. The economies of scale are a determining factor of CAPEX [44].…”

“…Based on the stoichiometry, the values of E and E' are calculated as follows: An important statement of the financial analyses of the STORE&GO project is that a high range of possible investment costs of electrolyzers and methanation systems can be seen in the literature [44]. The economies of scale are a determining factor of CAPEX [44]. The investment costs in this study are based on the calculations of van Leeuwen and Zauner [45] with minor modifications according to the technical infrastructure of the analyzed WWTPs and additional costs of a public-funded technology development projects.…”

“…(2) In the case of the methanation system, a slightly higher CAPEX than the base case, 0.5 EUR/kW el is taken into account because of some high specific investment costs for biomethanation presented by Böhm et al [44].…”

“…Previous P2G research has shown that there is a significant cost reduction potential regarding investment costs because of experience curves and learning rates. Böhm et al [44] calculated that PEMEC CAPEX will decrease from 1200 EUR/kW el (2017) to 530 EUR/kW el (2030), and biological methanation CAPEX will decrease from 600 EUR/kW SNG (2017) to 360 EUR/kW SNG . This means that CAPEX of these components will decrease by 55% and 45% in 13 years.…”