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TECHNICAL PAPERS

Thermodynamics of Insulated Pressure Vessels for Vehicular Hydrogen Storage

[+] Author and Article Information
S. M. Aceves, G. D. Berry

Lawrence Livermore National Laboratory, 7000 East Avenue, L-641, P.O. Box 808, Livermore, CA 94551

J. Energy Resour. Technol 120(2), 137-142 (Jun 01, 1998) (6 pages) doi:10.1115/1.2795024 History: Received December 04, 1997; Revised February 06, 1998; Online November 06, 2007

Abstract

This paper studies the application of insulated pressure vessels for hydrogen-fueled light-duty vehicles. Insulated pressure vessels are cryogenic-capable pressure vessels that can be fueled with liquid hydrogen (LH2 ); low-temperature (46 K) compressed hydrogen (CH2 ); or ambient-temperature CH2 . In this analysis, hydrogen temperatures, pressures, and venting losses are calculated for insulated pressure vessels fueled with LH2 or with low-temperature CH2 , and the results are compared to those obtained in low-pressure LH2 tanks. Hydrogen losses are calculated as a function of daily driving distance during normal operation; as a function of time during long periods of vehicle inactivity; and as a function of initial vessel temperature during fueling. The results show that insulated pressure vessels have packaging characteristics comparable or better than those of conventional, low-pressure LH2 tanks, with greatly improved dormancy and much lower boil-off, and therefore appear to be a good alternative for vehicular hydrogen storage.

Copyright © 1998 by The American Society of Mechanical Engineers
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