Evaporational cooling results

[MarkO1]

I performed a small study determining the evaporational cooling effects that a single 4.7" 115 volt AC fan has on my 90 gallon tank. The fan was placed suspended in my wood canopy http://petsforum.com/allglass/products/ ... _body.html
(middle brace shown in 4th photo from top/left) with the left hand side glass left open.
Over two nights I monitored my tank temperature with the fan on one night and off the next. During both nights, I did not opperate the lights. The ambient room temperature and humidity were similar over both nights (relative humidity between 27-31% and room temp went from 74º at 9pm and 68º at 8 am both nights).

Both nights the tank temp was at 84º at 9 pm at lights out.

At 8 am, morning 1 (with fan on) tank temp was 77.1º

At 8 am, morning 2 (with fan off) tank temp was 81.4º

Hope this helps anyone with summertime temperature issues.
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CSI: NY Forum

 

[vester_72]

I have to say that is simlar to results I have seen, only I have a 75 gallon using only one 2.5" x 2.5" computer fan.

I cam home the other day and my tank was at 83 degrees, from a normal 77-78.

I added the fan, left in the am with it at 81, returned home and it was at 77.5. Temperature in the house remained the same, the only variable changing was adding the fan, left all lights on, etc.

I was pleasantly surprised to say the least. Does increase evaporation, but much easier to deal with that a hot tank.

 

[vester_72]

I have to say that is simlar to results I have seen, only I have a 75 gallon using only one 2.5" x 2.5" computer fan.

I cam home the other day and my tank was at 83 degrees, from a normal 77-78.

I added the fan, left in the am with it at 81, returned home and it was at 77.5. Temperature in the house remained the same, the only variable changing was adding the fan, left all lights on, etc.

I was pleasantly surprised to say the least. Does increase evaporation, but much easier to deal with that a hot tank.

 

[baseman]

MarkO - Thanks for the info. My tank hasn't seen it's first summer yet, but my house has no AC and it can get pretty warm in the summer. I can come up with computer fans easily.

 

[MarkO1]

Vester, my evaporation probably increased by about 100% (from an average of about 0.5 gal to about 1 gallon per day). But I agree too, it's easy to add more R/O. Especially after I added a 7.5 gal jug that keeps the water level constant by automatically syphoning water into the sump.

Baseman, my wife brought the fans home from work. They work ideally... if anything, maybe a bit noisy, but not any louder than my ballast.
They're similar to the ones here:
http://www.action-electronics.com/fans.htm#Ac[/img]

Anyway you look at it, it's cheaper than a chiller or cranking the ac.
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Honda Super Cub

 

[vester_72]

Sorry for the double-post - not sure how I managed that

Jason