Title: Energy, exergy, and economic analyses of an innovative hydrogen liquefaction process utilising liquefied natural gas regasification system

Authors: Saman Faramarzi; Seyed Mojtaba Mousavi Nainiyan; Mostafa Mafi; Ramin Ghasemiasl

Addresses: Department of Mechanical Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran ' Department of Mechanical Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran ' Department of Mechanical Engineering, Imam Khomeini International University, Qazvin, Iran ' Department of Mechanical Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran

Abstract: A novel hydrogen liquefaction cycle integrated with liquefied natural gas regasification and steam methane reforming (SMR) is proposed. The novelty of this study is based on the process integration of three systems. The specific energy consumption (SEC) and the capacity of the optimised case are 6.59 kWh/kgLH2 and 371 tones' per day, respectively. Energy, exergy, and economic analyses are implemented. Additionally, the genetic algorithm (GA) codes are developed to optimise the base case to result in 30% better performance in terms of SEC than the base case.

Keywords: exergy analysis; hydrogen liquefaction; economic analysis; genetic algorithm; LNG regasification; mixed refrigerant.

DOI: 10.1504/IJEX.2022.124614

International Journal of Exergy, 2022 Vol.38 No.4, pp.442 - 456

Received: 28 Apr 2021
Accepted: 28 Oct 2021

Published online: 29 Jul 2022 *

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