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Title: Liquid hydrogen pump performance and durability testing through repeated cryogenic vessel filling to 700 bar

Abstract

Here, this paper reports the results of a comprehensive test of liquid hydrogen (LH 2) pump performance and durability conducted while cycle testing a prototype thin-lined cryogenic pressure vessel 456 times to 700 bar. This extensive LH2 pump experimental data set provides a wealth of information vital for a complete evaluation of the future potential of this promising technology for ambient temperature and cryo-compressed vessel refueling. The experiment was conducted at Lawrence Livermore National Laboratory (Livermore, CA)'s hydrogen test facility, specifically built for this experiment and including a containment vessel for safe testing of the prototype vessel and a control room for efficient monitoring. Original pump and storage instrumentation was complemented with an electric power analyzer and a boil-off mass flow meter for more complete pump characterization. The results of the experiment confirm most of the expected virtues of the LH 2 pump: rapid (3 min) refueling of the 65-liter prototype vessel at high flow rate (1.55 kgH 2 per minute on average), unlimited back to back refueling, low electricity consumption (1.1 kWh/kg H 2), no measurable degradation, and low maintenance. High cryogenic vessel fill density is another key performance metric that was demonstrated in an earlier publication. These virtuesmore » derive from the high density of LH 2 enabling pressurization to high density with relatively little energy consumption and high throughput from a small displacement pump. Boil-off losses as high as 27.7% of dispensed hydrogen were measured, at experimental conditions not representative of operation at a hydrogen refueling station. These losses drop to 15.4% for operation that may be representative of a small station (332 kg/day), while we anticipate less than 6% boil-off with the existing pump and Dewar with improved LH 2 delivery truck operations and a more favorable arrangement of the LH 2 pump relative to the Dewar.« less

Authors:
 [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1566793
Report Number(s):
LLNL-JRNL-746861
Journal ID: ISSN 0360-3199; 931675
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Hydrogen Energy
Additional Journal Information:
Journal Volume: 43; Journal Issue: 39; Journal ID: ISSN 0360-3199
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN

Citation Formats

Petitpas, Guillaume, and Aceves, Salvador M. Liquid hydrogen pump performance and durability testing through repeated cryogenic vessel filling to 700 bar. United States: N. p., 2018. Web. doi:10.1016/j.ijhydene.2018.08.097.
Petitpas, Guillaume, & Aceves, Salvador M. Liquid hydrogen pump performance and durability testing through repeated cryogenic vessel filling to 700 bar. United States. doi:10.1016/j.ijhydene.2018.08.097.
Petitpas, Guillaume, and Aceves, Salvador M. Fri . "Liquid hydrogen pump performance and durability testing through repeated cryogenic vessel filling to 700 bar". United States. doi:10.1016/j.ijhydene.2018.08.097. https://www.osti.gov/servlets/purl/1566793.
@article{osti_1566793,
title = {Liquid hydrogen pump performance and durability testing through repeated cryogenic vessel filling to 700 bar},
author = {Petitpas, Guillaume and Aceves, Salvador M.},
abstractNote = {Here, this paper reports the results of a comprehensive test of liquid hydrogen (LH2) pump performance and durability conducted while cycle testing a prototype thin-lined cryogenic pressure vessel 456 times to 700 bar. This extensive LH2 pump experimental data set provides a wealth of information vital for a complete evaluation of the future potential of this promising technology for ambient temperature and cryo-compressed vessel refueling. The experiment was conducted at Lawrence Livermore National Laboratory (Livermore, CA)'s hydrogen test facility, specifically built for this experiment and including a containment vessel for safe testing of the prototype vessel and a control room for efficient monitoring. Original pump and storage instrumentation was complemented with an electric power analyzer and a boil-off mass flow meter for more complete pump characterization. The results of the experiment confirm most of the expected virtues of the LH2 pump: rapid (3 min) refueling of the 65-liter prototype vessel at high flow rate (1.55 kgH2 per minute on average), unlimited back to back refueling, low electricity consumption (1.1 kWh/kg H2), no measurable degradation, and low maintenance. High cryogenic vessel fill density is another key performance metric that was demonstrated in an earlier publication. These virtues derive from the high density of LH2 enabling pressurization to high density with relatively little energy consumption and high throughput from a small displacement pump. Boil-off losses as high as 27.7% of dispensed hydrogen were measured, at experimental conditions not representative of operation at a hydrogen refueling station. These losses drop to 15.4% for operation that may be representative of a small station (332 kg/day), while we anticipate less than 6% boil-off with the existing pump and Dewar with improved LH2 delivery truck operations and a more favorable arrangement of the LH2 pump relative to the Dewar.},
doi = {10.1016/j.ijhydene.2018.08.097},
journal = {International Journal of Hydrogen Energy},
number = 39,
volume = 43,
place = {United States},
year = {2018},
month = {9}
}

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