Jean-Noel Cheynel

CEA Grenoble

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F. Michel

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

B. Lagier

CEA Grenoble

Pascal Roussel

Université d'Artois

P. Bonnay

CEA Grenoble

P. Charvin

CEA Grenoble

Jean‐Marc Poncet

Université de Caen Normandie

Michel Bon-Mardion

Université Grenoble Alpes

Roser Vallcorba-Carbonell

CEA Paris-Saclay

Lionel Monteiro

CEA Grenoble

B. Rousset

CEA Grenoble

Cooperative Institutions

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

CEA Grenoble

Université Grenoble Alpes

Institut Nanosciences et Cryogénie

Université Joseph Fourier

Département des Systèmes Basses Températures

Institut de Recherche Interdisciplinaire de Grenoble

CEA Paris-Saclay

ITER

CEA Cadarache

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Investigations of pulsed heat loads on a forced flow supercritical helium loop – Part A: Experimental set up

Cryogenics (2012)

C. Hoa Michel Bon-Mardion P. Bonnay P. Charvin Jean-Noel Cheynel

Cryogenics

Instrumentation

Solenoid

10.1016/j.cryogenics.2012.02.004

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Citations (36)

Forced flow supercritical helium in a closed heat transfer loop subjected to pulsed heat loads

AIP conference proceedings (2012)

Christine Hoa P. Bonnay Michel Bon-Mardion P. Charvin Jean-Noel Cheynel

The superconducting magnets of the tokamak JT-60SA are cooled by means of forced flows of supercritical helium at 4.4 K and 0.5 MPa. The closed loops transfer heat from the magnets to the refrigerator through heat exchangers immersed into a saturated liquid helium bath. An experimental loop was designed to represent a 1/20 scaled down mock-up of JT-60SA central solenoid cooling circuits. This design for keeping the same transit times in the helium circuits, aims at observing the thermally induced transients in the closed loop. Indeed, heated section simulates the variable loads coming from the magnet circuits. A series of experiments was performed with pulsed loads in an isochoric configuration of the loop. The cold circulator has been characterized under pulsed operation and its performances are addressed. Mass flow regulations at the interface of the refrigerator were tested to smooth the pulsed loads with the saturated liquid bath acting as a thermal buffer. Knowledge of the pulsed loads effects on the cryogenic components is important in view of a safe operation of the cryogenic system.

Cryogenics

Solenoid

Solenoid valve

10.1063/1.4707133

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Citations (8)