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Title: Thermal analysis of high-pressure hydrogen during the discharging process

Abstract

The transient temperature and pressure of hydrogen are measured during the hydrogen discharging process through an orifice in a high-pressure vessel. The initial pressures of hydrogen in the vessel are set to approximately 30, 60, and 100 MPa. The mass flow rate and heat flux between hydrogen and the inner wall of the vessel are theoretically estimated using fundamental equations and experimental results with accurate thermophysical properties of hydrogen. The generation of temperature distribution and flow due to heat transfer in the vessel during discharge is verified by numerical analysis. Further, the relationship between reference gas temperature and heat flux in the vessel during the release of high-pressure hydrogen is studied. The average heat flux in the vessel is calculated using experimental and numerical analysis. The appropriate reference temperature is obtained using the comparison of the average heat flux in the vessel. In addition, the dominant heat transfer mode during hydrogen discharge is investigated. Numerical analysis shows that natural convection is formed inside the vessel due to a decrease in temperature. The Nusselt numbers in this process are presented as a function of Rayleigh numbers which are obtained by the experimental results and mass and energy conservations. The relationship betweenmore » the Nusselt and Rayleigh numbers agrees with the heat transfer correlations of natural convections.« less

Authors:
 [1];  [2];  [1];  [3];  [1]
  1. Kyushu Univ. (Japan)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Saga Univ. (Japan)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1567034
Report Number(s):
NREL/JA-5400-74991
Journal ID: ISSN 0360-3199
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Hydrogen Energy
Additional Journal Information:
Journal Volume: 44; Journal Issue: 49; Journal ID: ISSN 0360-3199
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; heat transfer in a vessel; hydrogen discharge; high-pressure; orifice; numerical analysis

Citation Formats

Kawano, Y., Kuroki, Taichi, Sakoda, N., Monde, M., and Takata, Y. Thermal analysis of high-pressure hydrogen during the discharging process. United States: N. p., 2019. Web. doi:10.1016/j.ijhydene.2019.08.167.
Kawano, Y., Kuroki, Taichi, Sakoda, N., Monde, M., & Takata, Y. Thermal analysis of high-pressure hydrogen during the discharging process. United States. doi:10.1016/j.ijhydene.2019.08.167.
Kawano, Y., Kuroki, Taichi, Sakoda, N., Monde, M., and Takata, Y. Sat . "Thermal analysis of high-pressure hydrogen during the discharging process". United States. doi:10.1016/j.ijhydene.2019.08.167.
@article{osti_1567034,
title = {Thermal analysis of high-pressure hydrogen during the discharging process},
author = {Kawano, Y. and Kuroki, Taichi and Sakoda, N. and Monde, M. and Takata, Y.},
abstractNote = {The transient temperature and pressure of hydrogen are measured during the hydrogen discharging process through an orifice in a high-pressure vessel. The initial pressures of hydrogen in the vessel are set to approximately 30, 60, and 100 MPa. The mass flow rate and heat flux between hydrogen and the inner wall of the vessel are theoretically estimated using fundamental equations and experimental results with accurate thermophysical properties of hydrogen. The generation of temperature distribution and flow due to heat transfer in the vessel during discharge is verified by numerical analysis. Further, the relationship between reference gas temperature and heat flux in the vessel during the release of high-pressure hydrogen is studied. The average heat flux in the vessel is calculated using experimental and numerical analysis. The appropriate reference temperature is obtained using the comparison of the average heat flux in the vessel. In addition, the dominant heat transfer mode during hydrogen discharge is investigated. Numerical analysis shows that natural convection is formed inside the vessel due to a decrease in temperature. The Nusselt numbers in this process are presented as a function of Rayleigh numbers which are obtained by the experimental results and mass and energy conservations. The relationship between the Nusselt and Rayleigh numbers agrees with the heat transfer correlations of natural convections.},
doi = {10.1016/j.ijhydene.2019.08.167},
journal = {International Journal of Hydrogen Energy},
number = 49,
volume = 44,
place = {United States},
year = {2019},
month = {9}
}

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This content will become publicly available on September 14, 2020
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