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Thermodynamic analysis of a novel hydrogen–electricity–heat polygeneration system based on a very high-temperature gas-cooled reactor

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  • Ni, Hang
  • Peng, Wei
  • Qu, Xinhe
  • Zhao, Gang
  • Zhang, Ping
  • Wang, Jie

Abstract

Nuclear energy can offer clean, efficient, and large-scale hydrogen production, and a polygeneration system can meet multi-level energy demands. In this study, a novel polygeneration system coupled with a very high-temperature gas-cooled reactor is proposed for realizing the cascade utilization of energy. High-grade heat is used for the high-temperature processes of hydrogen production, and low-grade heat is used for the low-temperature processes of hydrogen production, electricity generation, and process heat extraction. The system can output hydrogen, electricity, and high-temperature steam simultaneously. Process simulation of iodine-sulfur cycle is performed to obtain heat duty of each component in hydrogen production process. Energy and exergy analyses are used to analyze thermodynamic performance of the system. The power ratio (PR) of electricity generation to hydrogen production and the share of the main steam extracted for heat supply (αSTSR) are two important parameters for determining energy distribution of the system, and the overall energy and exergy efficiencies of the system reach 51.27% and 66.96%, respectively, when PR = 1 and αSTSR = 0.15. The sulfuric-acid concentration tower has the largest exergy loss coefficient of 8.89%, followed by steam generator of 7.04%. These are crucial components for improving thermodynamic performance of the system.

Suggested Citation

  • Ni, Hang & Peng, Wei & Qu, Xinhe & Zhao, Gang & Zhang, Ping & Wang, Jie, 2022. "Thermodynamic analysis of a novel hydrogen–electricity–heat polygeneration system based on a very high-temperature gas-cooled reactor," Energy, Elsevier, vol. 249(C).
    • Handle: RePEc:eee:energy:v:249:y:2022:i:c:s0360544222005989
    DOI: 10.1016/j.energy.2022.123695
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    References listed on IDEAS

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    1. Wang, Qi & Macián-Juan, Rafael, 2022. "Thermodynamic analysis of two novel very high temperature gas-cooled reactor-based hydrogen-electricity cogeneration systems using sulfur-iodine cycle and gas-steam combined cycle," Energy, Elsevier, vol. 256(C).
    2. Ni, Hang & Qu, Xinhe & Peng, Wei & Zhao, Gang & Zhang, Ping, 2023. "Study of two innovative hydrogen and electricity co-production systems based on very-high-temperature gas-cooled reactors," Energy, Elsevier, vol. 273(C).

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