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Invisiblerepobob
enthusiast
Registered: 12/19/01
Posts: 261
Loc: Illinois
Humidity - Help
    #589439 - 03/25/02 11:34 PM (14 years, 8 months ago)

I have 7 5"x8"x4" Aluminium Meat Loaf Pans in a Rubbermaid container with a air stone and heater in about a gallon of water, 1 1/2 inches of perlite in the bottom sitting on 1/2inch of H2O and H2O2. The perlite on top is damp. The container is rather large, 32" long, 15" wide and 18" high.
Now for the problem. Before I turned on the heater and bubbler my humidy held at 87% for 24 hours. I turned on the heater and bubbler and within 12 hours the humidty dropped to 78%. I had to put the casings in because they were more than ready. What do I do? Why did Rh drop after I put more water in the air with the bubbler. My temp is 72 and seems to be steady. Should I raise it to 74, would that help the humidity.

Please help I'm confused.


Peace,
Bob


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Offlinejosh057
member
Registered: 03/25/02
Posts: 100
Loc: az
Last seen: 14 years, 1 month
Re: Humidity - Help [Re: repobob]
    #589498 - 03/26/02 12:46 AM (14 years, 8 months ago)

this may not exactly apply to you. But when I wanted to drop the temp in my chamber. I have a big chamber with only three rice cakes so far, anyways I put a bag of ice on the far side of it. as the temp dropped the humidity droped much more. I had it at 82 degrees and the humidity at 90%. When I put the ice in the temp dropped to 76-77 degrees, and the humidity dropped to 50%! this happened in abotu six hours. I think cold air takes out humidity. But then again I'm no expert, I am just basing this off my old physics class and logic.


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Invisiblerepobob
enthusiast
Registered: 12/19/01
Posts: 261
Loc: Illinois
Re: Humidity - Help [Re: josh057]
    #589725 - 03/26/02 07:30 AM (14 years, 8 months ago)

Thanks Josh.
My problem is getting my humidity up without raising the temp.
I either have all the experts here stumped or I'm not one of the boys.

Thanks again
Peace,
Bob


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OfflineAnnoA
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Re: Humidity - Help [Re: repobob]
    #589737 - 03/26/02 07:55 AM (14 years, 8 months ago)

Read this
http://www.ems.psu.edu/~fraser/Bad/BadClouds.html
and this
http://fermi.jhuapl.edu/people/babin/vapor/index.html

to see how relative humidity is affected by temperature.


Edited by Anno (03/26/02 07:57 AM)


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Invisiblerepobob
enthusiast
Registered: 12/19/01
Posts: 261
Loc: Illinois
Re: Humidity - Help [Re: Anno]
    #589881 - 03/26/02 01:02 PM (14 years, 8 months ago)

Thanks Anno.


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OfflineNomez
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Registered: 12/17/01
Posts: 71
Last seen: 14 years, 7 months
Re: Humidity - Help [Re: repobob]
    #590051 - 03/26/02 03:50 PM (14 years, 8 months ago)

those links dont really seem aplicable.... it measures what is happening on a molecular level... we know what happens in the real world and we can measure it. i think that's all that we need to really know in this application...

the idea that cool air can hold less water... like the first link says... is the right answer for the wrong reason... but it doesnt really matter. all that matters is that we know that there is more water in warm air and less in cool air... for whatever reason... i dont think it matters if the reasoning is wrong but the answer is the same. cool air will hold less water... be it because of condesation at cooler temps or whatever. we dont really need to know why... just the fact that it does.

we arent the scientists trying to prove a new therom.. just trying to use what we know to our advantage. all in all what we know is basically true, its just based on incorrect info.

thats just my opinion... if i misinterpreted anything let me know


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