Exergetic cost evaluation of hydrogen production powered by combined flash-binary geothermal power plant

Ceyhun Yilmaz, Mehmet Kanoglu*, Aysegul Abusoglu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)

Abstract

A combined flash-binary geothermal plant and a water electrolysis unit for hydrogen production are considered and thermodynamic and exergoeconomic analyses of the system are performed. A liquid geothermal water resource at 200 °C with a flow rate of 100 kg/s is considered. The power produced in the plant is used for the electrolysis process. The electrolysis water can be preheated to 70 °C by the geothermal water leaving the power plant and hydrogen can be produced at a rate of 0.0498 kg/s. The exergy efficiency of the power plant and the overall system are calculated to be 46.6% and 45.8%, respectively. The unit exergetic cost of electricity from the power plant is 11.1 $/GJ (or 0.0400 $/kWh) and that of the produced hydrogen is 26.1 $/GJ (or 3.14 $/kg H2).

Original languageEnglish
Pages (from-to)14021-14030
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number40
DOIs
Publication statusPublished - 26 Oct 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 Hydrogen Energy Publications, LLC.

Funding

This study is sponsored by the Scientific and Technological Research Council of Turkey (TUBITAK) with project number 113M207 . This support is greatly appreciated.

FundersFunder number
Scientific and Technological Research Council of Turkey
TUBITAK113M207

    Keywords

    • Electrolysis
    • Exergoeconomics
    • Exergy
    • Flash-binary cycle
    • Geothermal energy
    • Hydrogen production

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