Efficiency Increase of Biological Methanation based Power-to-Methane Technology Using Waste Heat Recovery with Organic Rankine Cycle

Authors

  • Axel Groniewsky
    Affiliation
    Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
  • Réka Kustán
    Affiliation
    Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
  • Attila Imre
    Affiliation
    Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
    Department of Thermohydraulics, Centre for Energy Research, P. O. B. 49, H-1525 Budapest, Hungary
https://doi.org/10.3311/PPch.20428

Abstract

Due to the efforts of reducing greenhouse gas emissions, nearly two-thirds of the installed electric capacity worldwide will come from renewables in 2050 (EIA 2021), making frequency control without energy storage impossible. Power-to-Methane (PtM) technology allows electricity to be stored in the form of methane. The storage efficiency of PtM may be increased either by maximizing the recovery of the stored electricity, which is a common method, or by reducing the amount of electricity the PtM has to be charged with for a given amount of stored energy. In this paper, a case study is presented for the latter by directly integrating an Organic Rankine Cycle into the PtM technology by recycling the waste heat from water electrolysis and biological methanation back to electrolysis. With this method, total storage efficiency can be increased by approximately two percentage points.

Keywords:

Power-to-Methane, Organic Rankine Cycle (ORC), energy storage, efficiency improvement

Citation data from Crossref and Scopus

Published Online

2022-10-03

How to Cite

Groniewsky, A., Kustán, R., Imre, A. “Efficiency Increase of Biological Methanation based Power-to-Methane Technology Using Waste Heat Recovery with Organic Rankine Cycle”, Periodica Polytechnica Chemical Engineering, 66(4), pp. 596–608, 2022. https://doi.org/10.3311/PPch.20428

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Articles