Heat Analysis of Liquid piston Compressor for Hydrogen Applications

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A new hydrogen compression technology using liquid as the compression piston is investigated from heat transfer point of view. A thermodynamic model, simulating a single compression stroke, is developed to investigate the heat transfer phenomena inside the compression chamber. The model is developed based on the mass and energy balance of the hydrogen, liquid and the wall of the compression chamber at each time step and positional node with various compression ratios to calculate the temperature distribution of the system. The amount of heat extracted from hydrogen, directly at the interface and through the walls, is investigated and compared with the adiabatic case. The amount of heat transfer towards the wall is assessed according to widely used heat transfer models available in the literature.The results show very low sensitivity of the model to different heat transfer correlations. Deviation of hydrogen temperature from adiabatic case is very small, due to large wall resistance and small contact area at the interface. Moreover, the results illustrates that the increasing of the total heat transfer coefficient at the interface and the wall will play a key role in reducing the hydrogen temperature
Original languageEnglish
Title of host publicationProceedings of the 20th World Hydrogen Energy Conference (WHEC 2014)
Number of pages8
Publication date2014
Publication statusPublished - 2014
Event20th World Hydrogen Energy Conference 2014 - Gwangju Metropolitan City, Korea, Republic of
Duration: 15 Jun 201420 Jun 2014


Conference20th World Hydrogen Energy Conference 2014
Country/TerritoryKorea, Republic of
CityGwangju Metropolitan City
Internet address


  • Liquid piston
  • Hydrogen compression
  • Thermodynamic model
  • Energy balance
  • Heat analysis


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