[Amps] FW: RE: Liquid Cooling Systems

[Will Matney]

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


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>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 at earthlink.net] 
>>> Sent: Saturday, March 05, 2005 10:20 AM
>>> To: 'amps at 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      
>>> 
>>> 
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