کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7721137 1497514 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced dormancy due to para-to-ortho hydrogen conversion in insulated cryogenic pressure vessels for automotive applications
ترجمه فارسی عنوان
رطوبت بهبود یافته به علت تبدیل هیدروژن به پارا اوروتو در مخازن تحت فشار عایق حرارتی برای برنامه های کاربردی خودرو
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
A dynamic model has been developed to characterize dormancy and hydrogen loss from an insulated cryogenic pressure vessel that is filled with 99.79%-para liquid hydrogen to reach supercritical conditions. The model considers the thermodynamics and kinetics of the endothermic para-to-ortho conversion that occurs when the stored H2 heats after the vessel is exposed to ambient conditions for an extended time. The thermal, thermodynamic, and kinetic aspects of the model were validated against experimental data obtained on a 151-L tank designed for service at nominal pressures up to 350 bar. Depending on the initial pressure, temperature, amount of H2, and the rate of heat gain from the ambient, the endothermic para-to-ortho conversion can extend the loss-free dormancy time by up to 85%. Under conditions in which the endothermic conversion does not materially affect dormancy, it can still significantly reduce the H2 loss rate and it can even introduce a secondary dormancy period.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 31, 17 October 2013, Pages 13664-13672
نویسندگان
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