Conveners
C2PoH - Hydrogen Systems
- John Barclay (Retired)
- Jacob Leachman (Washington State University)
Jesper Ringnér
(ESS),
John Jurns
(European Spallation Source ESS AB)
6/30/15, 2:00 PM
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
A key feature of the target system at ESS will be the cold moderators. With the use of supercritical hydrogen at 17 K and1.5 MPa, the energy of the neutrons is reduced before they reach the instrument lines. The neutrons will deposit significant amounts of energy into the hydrogen that must be removed to maintain the hydrogen at its nominal operating temperature. The cooling for the hydrogen...
Inmyong Park
(KAIST)
6/30/15, 2:00 PM
CEC-06 - Superconducting Magnet Systems
Poster Presentation
An active magnetic regenerative refrigerator (AMRR) is one of the useful technologies to improve the efficiency of hydrogen liquefaction process. The AMRR utilizes magnetocaloric effect to reduce the cold end temperature of the active magnetic regenerator (AMR). Since the magnetocaloric effect is a reversible process, it facilitates high thermodynamic efficiency of AMRR. However, the...
HIDEKI TATSUMOTO
(Japan Atomic Energy Agency)
6/30/15, 2:00 PM
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
At the J-PARC, the high-energy MeV-order neutrons, which are produced via a spallation reaction between 3-GeV protons and the mercury nucleus, are moderated to cold neutrons with MeV-order energy by passing them through a supercritical hydrogen moderator (1.5 MPa and around 20 K). The cryogenic hydrogen system, which provides it to three hydrogen moderators, has been completed in April 2008....
HIDEKI TATSUMOTO
(Japan Atomic Energy Agency)
6/30/15, 2:00 PM
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
The J-PARC cryogenic hydrogen system provides supercritical hydrogen with the para-hydrogen concentration of more than 99 % and the temperature of less than 20 K to three moderators so as to provide cold pulsed neutron beams of a higher neutronic performance. The nuclear heating is estimated to be 3.75 kW at the moderators for a 1-MW proton beam operation. The temperature rise is estimated to...
HIDEKI TATSUMOTO
(Japan Atomic Energy Agency)
6/30/15, 2:00 PM
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
At the J-PARC spallation neutron source, high-energy MeV-order neutrons generated from a mercury target are reduced to the appropriate energy level (meV order) in three types of hydrogen moderators (coupled, decoupled, and poisoned).The J-PARC cryogenic hydrogen system provides supercritical cryogenic hydrogen to the moderators at a pressure of 1.5 MPa and temperature of 18 K and removes 3.8...
Dr
Guoping Wang
(Institute of High Energy Physics(IHEP)), Ms
yaqiong wang
(Institute of High Energy Physics)
6/30/15, 2:00 PM
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
CSNS cryogenic system offers 1.5 MPa hydrogen as a neutron moderator at 18 ~ 22 K, and the para hydrogen concentration is higher than 99%. Two cold boxes were adopted, one is hydrogen circulation cold box and the other is accumulator cold box. The main equipments in the hydrogen circulation cold box are ortho-para convertor, H2-He heat exchanger, hydrogen circulators and hydrogen heater. And...
JONG BAIK
(FLORIDA SOLAR ENERGY CENTER)
6/30/15, 2:00 PM
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
The NASA Kennedy Space Center researchers have been working on enhanced and modernized cryogenic liquid propellant handling techniques to reduce life cycle costs of propellant management system for the unique KSC application. The KSC Ground Operation Demonstration Unit (GODU) for liquid hydrogen plans to demonstrate integrated refrigeration, zero-loss flexible term storage of liquid hydrogen,...
