<html>
<head>
</head>
<body>
It is curious though that you almost never see a copper condensing coil on
a domestic refrigerator. They are almost always steel. They don't even
have aluminum or copper fins. Often they just use a matrix of steel wire.
(It is the condensing coil that gives up heat to the ambient air.) This
type of condenser is always a "static" condenser which has no fan.<br>
<br>
An interesting sidelight now is the comparison of a car with an engine that
has an aluminum block to one that has a cast iron block. Aluminum blocks
are lighter, but tend to warp and self distruct when over heated. A cast
iron block is much more forgiving. Many people who have run out of water
going over the Pali have had to have their engines replaced if it has an
aluminum block, whereas a cast iron block might even seize up yet run perfectly
fine again once it has cooled down.<br>
<br>
Aluminum wiring in houses is generally considered dangerous fire hazard today
although it was installed in homes in the past as a cost cutting measure.
Copper is the standard today.<br>
<br>
MonMotha wrote:<br>
<blockquote type="cite" cite="mid:3D24D4DA.9060408@indy.rr.com">Steel is
probably ons of the worst materials for a heatsink precisely for the reason
you gave: it doesn't move heat well. For a heatsink, the objective is to
MOVE heat (this is why people with lots of heat to move LOVE peltiers). <br>
<br>
Remember, fans actually MAKE heat, but the reason they help cooling is because
they move the air around. This means that the hot air resulting from the
transfer of heat away from the sink is evacuated quickly and cool air is
brought in. Again, larger delta T means faster heat transfer.</blockquote>
<b><br>
It seems to me that after all this discussion that Wayne should learn to
live with his fan as that in fact is the best system.</b><br>
<br>
</body>
</html>