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Thermodynamic and performance analysis of TEG integrated compressed hydrogen energy storage system (TEG-CHES)

Author

Listed:
  • Zhang, Ruonan
  • Cai, Jingyong
  • Shi, Zhengrong
  • Zhang, Tao
  • Chen, Haifei

Abstract

Hydrogen is regarded as a viable alternative to traditional fossil fuels and a crucial element in future energy systems. The mainstream method of high-pressure gaseous hydrogen storage in industrial production consumes significant energy and results in considerable energy losses during storage. This study investigates the integration of a thermoelectric generator (TEG) with a compressed hydrogen energy storage system (CHES), proposing the novel TEG-CHES system to recover and efficiently utilize energy. The primary objective is to enhance the overall energy efficiency of hydrogen energy storage. A comprehensive mathematical model based on Aspen Plus is developed to evaluate the system's performance. The methodology focuses on analyzing key operational parameters, including hydrogen mass flow rate, compressor compression ratio, and thermal energy storage temperatures. Under optimal conditions, the system can generate 1344.5 kW of electrical energy, achieving a round-trip efficiency of 54.43 %. Compared to traditional systems such as compressed air and CO2 storage, the TEG-CHES system improves round-trip efficiency by 4.29 % and 7.02 %, respectively. The results demonstrate the potential of the TEG-CHES system to significantly enhance energy efficiency in hydrogen storage applications, offering a competitive solution for energy storage.

Suggested Citation

  • Zhang, Ruonan & Cai, Jingyong & Shi, Zhengrong & Zhang, Tao & Chen, Haifei, 2025. "Thermodynamic and performance analysis of TEG integrated compressed hydrogen energy storage system (TEG-CHES)," Renewable Energy, Elsevier, vol. 242(C).
    • Handle: RePEc:eee:renene:v:242:y:2025:i:c:s0960148125001648
    DOI: 10.1016/j.renene.2025.122502
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