Fwiw, I don't know what temps are being looked at here, but if the need to
raise the boiling point is necessary, for each pound of pressure placed upon a
closed system, the boiling point of the water is raised by 3 degrees.
Water as I recall is the best conductor of heat, when ethylene glycol
(anti-freeze) is added the temperature absorption of the liquid is reduced.
All of the chemist out there, correct me if I am wrong.
73,
Gary... wa6fgi
----- Original Message -----
From: Will Matney
To: amps@contesting.com
Sent: Thursday, March 10, 2005 2:04 PM
Subject: Re: [Amps] FW: RE: Liquid Cooling Systems
Tom,
That's why I mentioned using salts to raise the boiling point. If I
recall, they did something like this on nuclear reactor cooling. However,
I dont know if that would increase the heat carrying capacity, only raise>the
boiling point.
Best,
Will
>*********** REPLY SEPARATOR ***********
>
>On 3/10/05 at 8:11 PM Tomm Aldridge wrote:
>
>>My XYL, a research biologist, concurs but adds that DI may be more risky
>>as the ION exchange process could end up leaving behind chemicals if it
>>is not properly balanced. Water is water. I am a physicist and have to
>>comment on all the anecdotal evidence that somehow adding a fluid of a
>>lower heat capacity (antifreeze) to one of a higher heat capacity
>>(water) raises the fluid's ability to absorb heat. This just is not
>>true. If you can use water, it is the easiest to obtain and use as well
>>as one of the best thermal transport fluids around.
>>Paul Marbourg wrote:
>>> This massage was bounced originally due to an outlaw email masseuse
>>> accountant submission.
>>>
>>> -----Original Message-----
>>> From: Paul Marbourg [mailto:zborg@earthlink.net]
>>> Sent: Saturday, March 05, 2005 10:20 AM
>>> To: 'amps@contesting.com'
>>> Subject: RE: Liquid Cooling Systems
>>>
>>> Hi group. I am sorry, but I can't stand it any longer!
>>>
>>> There is virtually NO difference between "D.I." and distilled water if
>>the
>>> purification system(s) is (are) in good working order. Either process
>>> exposes the working fluid (water) to potential environmental
>>contamination
>>> if the process stream is not properly engineered from a materials
>>> standpoint. Typically, an in-line conductivity meter monitors the fluid
>>> conductivity of the process stream. When the conductivity of a DI
>stream
>>> rises above the set point, the flow is routed through a fresh column or
>>> production is terminated until the column can be replaced. DI systems
>>> consist of passing the water through a bed of cascade-cycled
>ion-exchange
>>> resin beads, one bed for positive and one bed for negative ions. There
>>may
>>> be an additional activated carbon filter for stripping non-polar trace
>>> organics out of the process stream as well, in high purity systems.
>>> Distillation stills, although very effective at removing ionic
>>impurities,
>>> run the risk of still being contaminated with trace organic impurities
>>> (which have sufficient vapor pressure to be entrained through the still
>>or
>>> transfer via azeotropic interaction with water). Thus either source of
>>> deionized water benefits by running it through an activated carbon
>>filter.
>>> Once high purity water has been produced, it's origin does not mean a
>>damn
>>> thing. Perhaps you were confusing DI water with softened water?
>>>
>>> In addition, ethylene glycol (1,2-Dihydroxyethane) and poly-ethylene
>>glycol
>>> (PEG) are not the same substances! PEG is a long-chain polymer of very
>>high
>>> molecular weight compared to a little ethylene glycol molecule. Their
>>> associated toxicities are radically different!
>>>
>>> Trust me, I am a chemist.
>>>
>>> 73, Paul WN7T
>>>
>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>>
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