At 06:06 AM 6/15/2011, David Jonsson wrote
Is there a chance that an electrical heater from
50 Hz AC will leave electromagnetic waves in the
water? Are there any good pages on this subject?
If you mean, are EM waves left in the water after
the heater is turned off : NO !
If you mean, will 50hz AC propagate in the water
: Short answer : probably not.
Long answer :
Pure water is an insulator. Sea water is only slightly conductive.
http://www.qsl.net/vk5br/UwaterComms.htm
The attenuation in db/Meter = 0. 0173 * sqrt (
frequency_in_herz * conductivity_mohs_per_meter)
Conductivity :
Sea water : 4.8
Drinking water: 5×10-4 to 5×10-2
Attenuation for drinking water : db/M = 0.0085
Since we're only talking about a few cm, I guess
the answer is : yes, they COULD propagate.
But there are two heaters : the external one is
outside of the copper tubing, so nothing would propagate.
The internal one is probably made from a coil of
resistive wire, so I suppose it COULD transmit a little.
But it is unlikely to be inside the reactor chamber itself.
So I doubt that it would have any effect on anything.
