Conveners
Tue-Af-Orals Session 4: Large Scale Refrigeration and Liquefaction
- Christoph Haberstroh
Emmanuel Monneret
(I)
08/07/2014, 16:00
C-01: Large scale refrigeration, liquefaction
Oral presentation (15min)
The ITER Cryoplant is composed of helium and nitrogen refrigerators and generator combined with 80K helium loop plants and external purification systems. Storage and recovery of the helium inventory is provided in warm and cold (4.5K and 80K) helium tanks.
The conceptual design of the ITER Cryoplant has been completed, the technical requirements defined for industrial procurement and...
Eric FAUVE
(ITER)
08/07/2014, 16:15
C-01: Large scale refrigeration, liquefaction
Oral presentation (15min)
The cooling power required to maintain the nominal operation condition of the ITER superconducting magnets and cryopumps is produced by three identical liquid helium (LHe) Plants, each capable to deliver an average cooling capacity equivalent to 25 kW at 4.5 K. The cold ends of these three LHe Plants are connected to the so called Cryoplant Termination Cold Box (CTCB). In the CTCB, the cold...
Mr
Biswanath Sarkar
(ITER-India, Institute for Plasma Research), Mr
Nitin Shah
(ITER-India, Institute for Plasma Research),
SATISH BADGUJAR
(ITER Organization)
08/07/2014, 16:30
C-01: Large scale refrigeration, liquefaction
Oral presentation (15min)
The cryoline (CL) system of ITER consists of a complex network of vacuum insulated multi and single process lines distributed over three different areas with a total length of about 5 km. With the imminent award of the manufacturing contract for a prototype, the CL project will soon enter into the construction phase. Acceptance tests after on-site installation are critical for the validation...
Christine Hoa
(CEA SBT)
08/07/2014, 16:45
C-01: Large scale refrigeration, liquefaction
Oral presentation (15min)
Strategies for smoothing pulsed heat loads are of great interest for future operation of large refrigeration systems for tokamaks, such as JT-60SA or ITER as their superconducting magnets are cooled by independent supercritical helium loops. Numerical and experimental process studies have been conducted at CEA Grenoble to validate and optimize the control of such large scale refrigeration...
Mr
Laurent Jean Tavian
(CERN)
08/07/2014, 17:00
C-01: Large scale refrigeration, liquefaction
Oral presentation (15min)
The discovery in 2012 of a Higgs boson at CERN is the start of a major program of work to measure this particle’s properties with the highest possible precision for testing the validity of the Standard Model and to search for further new physics at the energy frontier. The LHC is in a unique position to pursue this program. Europe’s top priority is the exploitation of the full potential of the...
Mr
Serge Claudet
(CERN)
08/07/2014, 17:15
C-01: Large scale refrigeration, liquefaction
Oral presentation (15min)
The Large Hadron Collider (LHC) cryogenic system requires an unprecedented helium inventory of 136 tons. If the operational availability for physics was clearly set first priority for run 1 (from first cool-down to long shut-down 1), specific measures were taken from the beginning towards the best rational use of helium during this period. Additional storage capacity was installed to match...
Mr
Serge Claudet
(CERN)
08/07/2014, 17:30
C-01: Large scale refrigeration, liquefaction
Oral presentation (15min)
The Large Hadron Collider (LHC) is cooled by eight independent helium cryogenic plants. Each cryogenic plant combines an 18kW at 4.5K refrigerator and a 2.4kW at 1.8K refrigeration unit totaling 64 oil lubricated screw compressors, 74 expansion turbines and 28 cold hydrodynamic compressors. Since the first cool-down of LHC in 2007, the large number of running hours and start-stop sequences...
Toshiyuki Mito
(National Institute for Fusion Science (NIFS))
08/07/2014, 17:45
C-01: Large scale refrigeration, liquefaction
Oral presentation (15min)
The Large Helical Device (LHD) is a heliotron-type fusion plasma experimental machine which consists of a fully superconducting magnet system cooled by a helium refrigerator having the total equivalent cooling capacity of 9.2 kW@4.4 K. 17 times of plasma experimental campaigns have been performed successfully from 1997 with high reliability. However, 17 years have passed from the beginning of...
Chandra Prakash Dhard
(M)
08/07/2014, 18:00
C-01: Large scale refrigeration, liquefaction
Oral presentation (15min)
The cryogenic systems of the stellarator fusion experiment Wendelstein 7-X (W7-X) consisting of superconducting coils, coil-casings and supports will be operated at 3.4K in peak power and 3.9K in standard mode. Radiation shield (80K) protects these components against ambient loads. The refrigerator supplied by Linde Kryotechnik AG has an equivalent refrigeration power of 7kW at 4.5K. It...
