A1 Journal article (refereed), original research

Cost benefits of optimizing hydrogen storage and methanation capacities for Power-to-Gas plants in dynamic operation


Open Access publication

Publication Details
Authors: Gorre Jachin, Ruoss Fabian, Karjunen Hannu, Tynjälä Tero, Schaffert Johannes
Publisher: Elsevier
Publication year: 2020
Language: English
Related Journal or Series Information: Applied Energy
Volume number: 257
ISSN: 0306-2619
JUFO-Level of this publication: 3
Open Access: Open Access publication

Abstract

Power-to-Gas technologies offer a promising approach for converting
renewable electricity into a molecular form (fuel) to serve the energy
demands of non-electric energy applications in all end-use sectors. The
technologies have been broadly developed and are at the edge of a mass
roll-out. The barriers that Power-to-Gas faces are no longer technical,
but are, foremost, regulatory, and economic. This study focuses on a
Power-to-Gas pathway, where electricity is first converted in a water
electrolyzer into hydrogen, which is then synthetized with carbon
dioxide to produce synthetic natural gas. A key aspect of this pathway
is that an intermittent electricity supply could be used, which could
reduce the amount of electricity curtailment from renewable energy
generation. Interim storages would then be necessary to decouple the
synthesized part from hydrogen production, to enable (I) longer
continuous operation cycles for the methanation reactor, and (II)
increased annual full-load hours, leading to an overall reduction in gas
production costs. This work optimizes a Power-to-Gas plant
configuration with respect to the cost benefits using a Monte
Carlo-based simulation tool. The results indicate potential cost
reductions of up to 17% in synthetic natural gas production by
implementing well-balanced components and interim storages. This study
also evaluates three different power sources which differ greatly in
their optimal system configuration. Results from time-resolved
simulations and sensitivity analyses for different plant designs and
electricity sources are discussed with respect to technical and economic
implications, so as to facilitate a plant design process for decision
makers.


Last updated on 2019-22-10 at 13:10