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Oil-gas heat transfer through diaphragms of a diaphragm compressor for hydrogen refueling stations

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  • Ren, Shengdong
  • Jia, Xiaohan
  • Li, Kai
  • Zhang, Ronghe
  • He, Peng
  • Peng, Xueyuan

Abstract

The high gas temperature is a major issue for diaphragm compressors in hydrogen refueling stations. The heat transfer between the gas and the hydraulic oil through the diaphragm is a significant and complex heat transfer path of the compressor. A mathematical model was established to analyse the oil-gas heat transfer characteristics. To further investigate the variables influencing the heat transfer, test benches for the thermal contact resistance between diaphragms and the heat transfer efficiency of diaphragm compressors were constructed. The results proved that the influence of the properties of diaphragms on heat transfer can be ignored because the thermal conduction resistance and thermal contact resistance are significantly lower than the convective heat transfer resistance on both sides of the diaphragms. Besides, the oil temperature has a significant effect. The hydraulic oil acts as a heat source during the compressor operation. The high-temperature hydraulic oil will heat the gas, raising the compressor discharge temperature over the adiabatic compression temperature. Effective oil temperature control measures can reduce the discharge temperature of the 90 MPa diaphragm compressor in this study by 45 °C.

Suggested Citation

  • Ren, Shengdong & Jia, Xiaohan & Li, Kai & Zhang, Ronghe & He, Peng & Peng, Xueyuan, 2026. "Oil-gas heat transfer through diaphragms of a diaphragm compressor for hydrogen refueling stations," Renewable Energy, Elsevier, vol. 256(PI).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pi:s0960148125023109
    DOI: 10.1016/j.renene.2025.124646
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    References listed on IDEAS

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    1. Sdanghi, G. & Maranzana, G. & Celzard, A. & Fierro, V., 2019. "Review of the current technologies and performances of hydrogen compression for stationary and automotive applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 102(C), pages 150-170.
    2. Zheng, ShiYong & Liu, Kang & Li, Yuming & Li, Biqing & Usman, Ahmed, 2024. "How does hydrogen energy technology help to achieve carbon neutrality targets?," Renewable Energy, Elsevier, vol. 227(C).
    3. Long, Yaomei & Li, Songyuan & Liu, Guannan & Shen, Lin & Liao, Zhenyang & Lv, Yuan & Zhong, Yong & Li, Yun, 2025. "Effects of hydraulic oil viscosity on the operational performance of ultra-high-pressure hydrogen diaphragm compressors," Energy, Elsevier, vol. 330(C).
    4. Kourougianni, Fanourios & Arsalis, Alexandros & Olympios, Andreas V. & Yiasoumas, Georgios & Konstantinou, Charalampos & Papanastasiou, Panos & Georghiou, George E., 2024. "A comprehensive review of green hydrogen energy systems," Renewable Energy, Elsevier, vol. 231(C).
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