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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received September 2, 2024
Accepted November 23, 2024
Available online February 25, 2025
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System Design and Economic Evaluation of a Liquid Hydrogen Superstation

School of Chemical Engineering , Pusan National University , 2 Busandaehak-Ro, 63Beon-Gil, Geumjeong-Gu , Busan 46241 , Republic of Korea 1Department of Chemical and Biochemical Engineering , Dongguk University , 30 Pildong-Ro, Jung-Gu , Seoul 04620 , Republic of Korea 2Institute for Environment and Energy , 2 Busandaehak-Ro, 63Beon-Gil, Geumjeong-Gu , Busan 46241 , Republic of Korea
Korean Journal of Chemical Engineering, February 2025, 42(2), 233-255(23)
https://doi.org/10.1007/s11814-024-00351-7

Abstract

Liquid hydrogen (LH 2 )-based hydrogen refueling stations (HRSs) are promising for high-capacity refueling, given the high

density of LH 2 , which facilitates large-scale transportation and storage. However, in LH 2 HRSs, the cryogenic cold energy

of LH 2 is wasted during the vaporization process required to refuel hydrogen for fuel cell vehicles. To overcome this issue,

this study proposes a novel LH 2 -based hydrogen superstation (HSS) that recovers the otherwise wasted cold energy to generate

electricity for the station, with any excess electricity used to charge electric vehicles. To explore the most cost-eff ective

confi guration for cold energy recovery in the HSS, two power generation cycles were designed: one incorporating a Brayton

cycle followed by a Rankine cycle (BC-RC), and another using two Rankine cycles in series (RC-RC). Combining the BC-RC

and RC-RC confi gurations, this two-stage design is adopted to effi ciently recover cold energy across a broad temperature

range during the vaporization process. The HSS using the BC-RC confi guration achieves 53% more cold energy recovery,

generates 19% more power, and experiences 8% less exergy waste compared to the HSS with the RC-RC setup. However,

in smaller-scale cold energy recovery systems applied to HSS, the cost savings from using pumps instead of compressors

outweigh the additional power generation benefi ts of the Brayton cycle. Consequently, the HSS with the RC-RC confi guration

demonstrates the highest economic feasibility, with a 2% higher net present value.

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