Gary,
I thought the same thing as water boils at 212 deg F if I recall. There testing
was a shade over boiling at 220 deg F. I guess what they were saying is that by
decreasing the size of the bubbles forming, that increases the area of the
coolent to the metal. But, they didn't address about changing the temp. of the
boiling point. To me, that would be better as no bubbles would be created as
the coolent wont boil except at some higher temp.. What they did I guess was
make the coolent stay cooler for a longer time than it normally would by
addressing the area of heat transfer. If the motor was run longer or at a
higher yet RPM, that temp could raise back up as it was only about a 10 deg
difference. I think they said they ran a motor at 7000 RPM for 3 hours on the
test. This was said on the video demo they had. Neither on it, or the pdf they
had, said anything about the ingrediants. My guess that by them dealing with
oils/lubricants, theyr'e using something like this which would fo
ol with the surface tention. For our use, if there was an addative which
raised the boiling point, and had a high dialectric strength, that would be the
berries.
Best,
Will
*********** REPLY SEPARATOR ***********
On 3/11/05 at 11:39 AM Gary Schafer wrote:
>Well, it sounds good but they left out a few things.
>It would seem that if the surface tension is less with this product that
> would make turbulent flow become less. With less turbulent flow there
>is less heat transfer.
>
>With laminar flow (low turbulence) there is a layer of water near the
>surface that insulates the rest of the water from the surface. Less heat
>transfer with laminar flow than there is with turbulent flow. You don't
>particularly want a super smooth surface for best cooling as there will
>be less turbulence.
>
>The hot spots that develop on the cylinder walls that cause cavitation
>can only be decreased by a higher boiling point in the coolant.
>
>While the "water wetter" may lower the overall coolant temperature they
> do not address what happens to the hot spots. They suggest raising the
>cooling system pressure. That tells you that the hot spots are still a
>problem. If left unchecked the cavitation will bore a hole in the
>cylinder wall.
>
>73
>Gary K4FMX
>
>Will Matney wrote:
>> Rich,
>>
>> I finally found Water Wetter on the manufacturers website last nite and
>read about it. Keep in mind this company makes lubricants. It said that
>water wetter reduces the surface tension of the water where it meets the
>hot surfaces and reduces the size of any bubbles. This gives more area of
>contact for the water to whatevers being cooled. Their tests showed about
>a 10 deg. F drop from 210 Deg. F using straight water if I recall the test
>correctly. They also explained that running a 50%/50% water glycol mix cut
>the cooling ability by X2. This water wetter dropped that mix 20 deg. F
>from 220 deg. F. My guess is that its some sort of really thin oil or a
>synthetic which acts like a soap. You can mix soap with bug spray when
>spraying plants to reduce surface tension and make the bug spray stick to
>the plant.
>>
>> Best,
>>
>> Will
>>
>> *********** REPLY SEPARATOR ***********
>>
>> On 3/11/05 at 5:57 AM R. Measures wrote:
>>
>>
>>>On Mar 10, 2005, at 8:27 PM, Will Matney wrote:
>>>
>>>
>>>>Joe,
>>>>
>>>>Correct, they make those copper blocks now to water cool aluminum heat
>>>>sinks. I think there's about 2-3 heatsink manufacturers making them
>>>>now, Thermalloy being one. This brings up several electronic items,
>>>>tube and transistor amps plus super cooling voltage regulator
>>>>assemblies. The water wetter sounds like a good idea and I'm curious
>>>>myself what's in it to increase the heat transfer.
>>>
>>>Also, if "Water Wetter" turns out to be electrically conductive, it may
>>>not be wonderful for an anode coolant.
>>>
>>>>Best,
>>>>
>>>>Will
>>>>
>>>>*********** REPLY SEPARATOR ***********
>>>>
>>>>On 3/10/05 at 10:55 PM Joe Subich, K4IK wrote:
>>>>
>>>>
>>>>>Will writes:
>>>>>
>>>>>>Personally, I dont see anything wrong with the posts as they
>>>>>>pertain directly to water cooled tubes. If some addative can
>>>>>>be used to cool a tube better, this is an amp forum, and it
>>>>>>should be discussed. This especially if the addative can
>>>>>>prolong the life of a very expensive tube.
>>>>>
>>>>>Neither do I see a problem. Fact is, by this time next year
>>>>>I expect to see a water cooled solid state amplifier available
>>>>>at Dayton. There should be some 120 - 200 volt transistors
>>>>>available at a reasonable price per watt by then the problem
>>>>>will be keeping them cool with a typical heatsink/fan. A
>>>>>water cooled substrate (copper block) with a small closed loop
>>>>>system would make for a very nice package.
>>>>>
>>>>>I hope we see some 1500 Watt (CW) output 100% duty cycle solid
>>>>>state amps (4 transistors) at reasonable prices (competitive
>>>>>with the Ameritron, TenTec, Commander, etc.) within the next
>>>>>two or three years.
>>>>>
>>>>>73,
>>>>>
>>>>> ... Joe, K4IK
>>>>>
>>>>>
>>>>>
>>>>>__________ NOD32 1.999 (20050215) Information __________
>>>>>
>>>>>This message was checked by NOD32 antivirus system.
>>>>>http://www.nod32.com
>>>>
>>>>
>>>>
>>>>_______________________________________________
>>>>Amps mailing list
>>>>Amps@contesting.com
>>>>http://lists.contesting.com/mailman/listinfo/amps
>>>>
>>>>
>>>
>>>Richard L. Measures, AG6K, 805.386.3734. www.somis.org
>>>
>>>
>>>__________ NOD32 1.999 (20050215) Information __________
>>>
>>>This message was checked by NOD32 antivirus system.
>>>http://www.nod32.com
>>
>>
>>
>>
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>>
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>
>
>
>
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