Numerical analysis of flow and temperature characteristics in a high multi-stage pressure reducing valve for hydrogen refueling station

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Abstract

Hydrogen refueling station is one of the most important parts for the hydrogen energy utilization. In this paper, a novel high multi-stage pressure reducing valve (HMSPRV) is proposed, which can be used for hydrogen stable decompression in hydrogen refueling station. In HMSPRV, the inner and outer porous shrouded valve core is used to replace piston valve core to achieve the first-stage throttling, and the porous orifice plate is chosen as the second-stage throttling component. Meanwhile, in order to verify the applicability of HMSPRV, the flow characteristics of two fluids are studied. Firstly, the choked flow, flow and temperature characteristics of superheated steam under different valve openings are carried out. Secondly, the flow characteristic of hydrogen is also conducted to validate the application of HMSPRV in hydrogen refueling station. The results show that, for superheated steam flow, with the increasing of valve openings, the maximum gradient of fluid pressure moves from the fitting surface where inner and outer porous shrouded to the orifice plate. The regulation of its amount is decreasing first and then increasing. With the increasing of valve openings, the maximum velocity, turbulent dissipation rate and pressure loss are all increasing gradually, while the temperature does not change significantly. For hydrogen flow, both the pressure changing process and velocity changing process are similar to superheated steam. It can be concluded that HMSPRV has good flow and temperature characteristics in complex conditions, and it does not prone to choked flow. Throttling effect of the multi-stage pressure reducing way is obvious. This work can benefit the further research work on hydrogen stable decompression in hydrogen refueling station.

Detaljer

Författare
  • Zhi Jiang Jin
  • Fu Qiang Chen
  • Jin Yuan Qian
  • Ming Zhang
  • Li Long Chen
  • Fei Wang
  • Yang Fei
Externa organisationer
  • Zhejiang University
  • Hangzhou Worldwides Valve Co., Ltd.
  • Hangzhou Special Equipment Inspection and Research Institute
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Energiteknik

Nyckelord

Originalspråkengelska
Sidor (från-till)5559-5570
Antal sidor12
TidskriftInternational Journal of Hydrogen Energy
Volym41
Utgivningsnummer12
StatusPublished - 2016 apr 6
PublikationskategoriForskning
Peer review utfördJa
Externt publiceradJa