Subsea electronics bottle on the seabed
Bolted joint spreading
R
spread
=
0.30 K/W
q
=
60 W
Vapour chamber
R
pipe
=
0.02 K/W
Oil-filled gap
R
conv
=
0.08 K/W
Housing wall and sea film
R
wall
=
0.15 K/W
Converter stage
P
d
=
60 W
Power board
T
b
=
37 °C
Spreader flange
T
f
=
19 °C
Vapour chamber head
Housing bore
T
hb
=
13 °C
Seawater at 1800 m
T
sea
=
4 °C