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Matériaux pour le vide et les rayonnements - IN2P3

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Le transfert de cha<strong>le</strong>ur doit être optimisé au point du process<br />

Process de refroidissement sous <strong>vide</strong><br />

2<br />

1<br />

Technologies:<br />

1. Techno de brasage grande conductivité<br />

2. Techno de traversée soudée<br />

inox/inox – Alu/Alu-inox/Cu<br />

3. Techno de raccord inox/Cu –<br />

Inox/inox<br />

3<br />

T fluid_in<br />

Q<br />

in<br />

=<br />

h ⋅ A ⋅ ( Twall<br />

− Tfluid<br />

)<br />

T fluid<br />

T wall<br />

T fluid_out<br />

Transfert par Convexion forcée<br />

Transport de cha<strong>le</strong>ur<br />

Q<br />

out<br />

= φ ⋅ ρ ⋅ C p ⋅ ( Tfluid<br />

_ out − Tfluid<br />

_ in )<br />

Regime permanent: Q in<br />

=Q out<br />

29Sept-2 Oct 2008<br />

Roscoff – Matériaux <strong>pour</strong> <strong>le</strong> <strong>vide</strong> <strong>et</strong> <strong>le</strong>s <strong>rayonnements</strong> – Chap. 7- Y.Dabin - ESRF Grenob<strong>le</strong><br />

7-2

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