Am 22.09.2011 05:51, schrieb Alan Fletcher:
That presumes that the heat exchange takes place on the surface of the
core. But the heat is (supposedly) produced by thermalization of gamma
rays, which could be anywhere nearby. Rossi has said that it is partly
in the copper tubing and partly in the lead shielding. The total
available area is easily 10 times that of the core, so the delta T
could be 780C, not 7800C.
Its early in the morning, not much time.
Quick thought: If the heat is released inside the lead shield, then it
must travel through the lead.
I dont know the thermal conductivity of lead, but lead melts at 325
centigrade (if I remember correctly) and this also should limit the
thermal flow.
Peter
