RE: Thermodynamics of Evaporative Cooling

Steve:

good input. would you kindly contact me off list? <a href="/group/PipingDesign/post?postID=TQ4MLp0PKXfuhzc3x8HPphlvtv_jgvvA4AsZGnKc8Bp9CiLNQxfteteb_rHfHigU7yjVU7s">tlaupa@frii.com</a>

At 02:27 PM 3/14/2003 +1300, you wrote:
>Hi Thomas
>It does work; I used it temporarily on an oil cooler radiator. May even have
>some data for performance estimating. Let me know if it would help and I'll
>have a rummage. However many fin tube coolers have the fins designed so the
>air (over fins) side coefficient is similar to the liquid (in tube)
>coefficient so cooling effect can only be doubled unless the water is cold.
>The deionised water could easily lead to corrosion problems, so you will
>probably need to dose with a (food grade) inhibitor if there if one
>available. When estimating water demand you will need to allow for drift
>loss which could easily run to 3% of the circulating volume. Possibly some
>blowdown may also be required.
>Algal/bacterial (e.g. legionella) growth can be a problem depending on
>temperatures, and the biocide dosing aspect can open a can of worms with
>high drift rates.
>I assume you intend recirculating unless you have water to burn.
>
>An extended trial would be advisable.
>
>Cheers
>
>Steve McKenzie
>
>-----Original Message-----
>From: Thomas Laupa [mailto:tlaupa@frii.com]
>Sent: Friday, March 14, 2003 1:57 PM
>To: <a href="/group/PipingDesign/post?postID=pCbnkQKF3-BVoCV-ygogBIgI3s9H0OAMKa6FHKDsXArV6i2bhwgSQ3ihlySs4s9g57u5hOnCCUSlGDef1ekoyUQZd8AT">PipingDesign@yahoogroups.com</a>
>Subject: [PipingDesign] Thermodynamics of Evaporative Cooling
>
>
>
> >Gentlemen:
>
>please share your thoughts on the following:
>
> >a customer has an "fin fan" cooler (basically a car radiator) that is
>overloaded. he can increase gas recovery if he can improve the heat
>rejection of this device. rather than increasing surface area, he has
>asked us to explore spraying water on this radiator to increase heat
>transfer.
>
> >we are in a very dry environment, we have deionized water available, and
>the materials of construction are carbon steel tubes and aluminum fins.
>
>what do you guys think?
>
>
>
>
>Thomas G Laupa PE
>FBN Services
>1003 Remington, Fort Collins, CO, 80524
>970-227-5127
>800-493-5009 fax
>
>
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Thomas G Laupa PE
Senior Engineer - Ondeo Nalco Applied Services Office Address: 1001 Frontenac Rd, Naperville, IL, 60566 Courier Address: 1003 Remington, Fort Collins, CO, 80524 970-227-5127
800-493-5009 fax Received on Thu Mar 13 22:51:00 2003