CONSTRUCTION OF A PARA-ORTHO HYDROGEN TEST CRYOSTAT

被引：4

作者：

Essler, J. ^{[1
]}

Haberstroh, Ch. ^{[1
]}

机构：

[1] Tech Univ Dresden, Lehrstuhl Kalte & Kryotech, D-01062 Dresden, Germany

来源：

ADVANCES IN CRYOGENIC ENGINEERING, VOLS 55A AND 55B | 2010年 / 1218卷

关键词：

hydrogen; ortho-para conversion; para ratio measurement;

D O I：

10.1063/1.3422368

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In a prospective hydrogen economy it is necessary to verify the para concentration of the employed hydrogen. In case of a short storage time of about a few days only it has been shown that a partial conversion into para-hydrogen gives an optimized overall efficiency. Hence, an easy and reliable method of measuring the para-hydrogen concentration is needed. In this paper, the concept and construction of a small test cryostat are described and first results are presented. The measuring principle is based on a catalytic induced adiabatic ortho-para conversion of a hydrogen gas flow starting from a known temperature. The operation of the system only requires a certain amount of liquid nitrogen as coolant. To determine the concentration of para-hydrogen it is only necessary to measure the temperature of the gas before and after the adiabatic catalyst cell. The measuring cryostat is used for further investigation of the spontaneous para-ortho conversion in the supercritical state. In addition, the design of the cryostat allows the investigation of different catalyst materials regarding the catalytic activity and possible degradation by using a known para concentration for the measurement.

引用

页码：305 / 310

页数：6

共 50 条

[31] Study on Hydrogen Ortho-Para Conversion Coupled with Flow and Heat Transfer of the Plate Fin Heat Exchanger [J].

Xu P. ;

Wen J. ;

Li Y. ;

Wang S. ;

Tu J. .

Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University, 2021, 55 (12) :16-24

[32] High-Temperature Limit for the O2-Catalyzed Ortho-Para Conversion Rate in Solid Hydrogen [J].

Valeri Shevtsov ;

Pekka Malmi ;

Eero Ylinen ;

Matti Punkkinen .

Journal of Low Temperature Physics, 1999, 114 :431-444

[33] High-temperature limit for the O2-catalyzed ortho-para conversion rate in solid hydrogen [J].

Shevtsov, V ;

Malmi, P ;

Ylinen, E ;

Punkkinen, M .

JOURNAL OF LOW TEMPERATURE PHYSICS, 1999, 114 (5-6) :431-444

[34] Ortho and para interstitial H2 in silicon [J].

Lavrov, EV ;

Weber, J .

PHYSICA B-CONDENSED MATTER, 2003, 340 :646-649

[35] DESIGN OF A SOLID HYDROGEN TARGET CRYOSTAT FOR POSITRON MODERATION STUDIES [J].

Nixon, C. A. ;

Leachman, J. W. .

ADVANCES IN CRYOGENIC ENGINEERING, VOLS 57A AND 57B, 2012, 1434 :384-390

[36] Measurements of the change of neutronic performance of a hydrogen moderator at Manuel Lujan Neutron Scattering Center due to conversion from ortho- to para-hydrogen state [J].

Ooi, M. ;

Ino, T. ;

Muhrer, G. ;

Pitcher, E. J. ;

Russell, G. J. ;

Ferguson, P. D. ;

Iverson, E. B. ;

Freeman, D. ;

Kiyanagi, Y. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2006, 566 (02) :699-705

[37] Millimetre-wave spectroscopy of deuterated vinyl radicals, observation of the ortho-para mixing interaction and prediction of fast ortho-para conversion rates [J].

Tanaka, Keiichi ;

Hayashi, Masato ;

Ohtsuki, Mitsuhiko ;

Harada, Kensuke ;

Tanaka, Takehiko .

MOLECULAR PHYSICS, 2010, 108 (18) :2289-2301

[38] Quantum rotation of ortho and para-water encapsulated in a fullerene cage [J].

Beduz, Carlo ;

Carravetta, Marina ;

Chen, Judy Y-C ;

Concistre, Maria ;

Denning, Mark ;

Frunzi, Michael ;

Horsewill, Anthony J. ;

Johannessen, Ole G. ;

Lawler, Ronald ;

Lei, Xuegong ;

Levitt, Malcolm H. ;

Li, Yongjun ;

Mamone, Salvatore ;

Murata, Yasujiro ;

Nagel, Urmas ;

Nishida, Tomoko ;

Ollivier, Jacques ;

Rols, Stephane ;

Room, Toomas ;

Sarkar, Riddhiman ;

Turro, Nicholas J. ;

Yang, Yifeng .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2012, 109 (32) :12894-12898

[39] Para-hydrogen enrichment and hyperpolarization [J].

Canet, Daniel ;

Aroulanda, Christie ;

Mutzenhardt, Pierre ;

Aime, Silvio ;

Gobetto, Roberto ;

Reineri, Francesca .

CONCEPTS IN MAGNETIC RESONANCE PART A, 2006, 28A (05) :321-330

[40] ON THE ORTHO:PARA RATIO OF H3+ IN DIFFUSE MOLECULAR CLOUDS [J].

Crabtree, Kyle N. ;

Indriolo, Nick ;

Kreckel, Holger ;

Tom, Brian A. ;

McCall, Benjamin J. .

ASTROPHYSICAL JOURNAL, 2011, 729 (01)

← 1 2 3 4 5 →