[time-nuts] Temp/Humidity control systems?

jimlux jimlux at earthlink.net
Wed Oct 26 15:48:16 EDT 2016


On 10/26/16 8:59 AM, John Ackermann N8UR wrote:
> I may have the opportunity to build a small "clock room" and am
> considering whether I could make it an environmentally controlled space.
>  I'd like to learn about the options for doing this.
>
> The space would probably be 6x8 feet or so, in a basement with one
> outside wall.
>
> Can anyone point me to purveyors of the hardware to do something like
> this?  Because I'll have a limited time to build this, I'm looking for
> something that uses more-or-less off the shelf gear, and not a whole lot
> of custom engineering.

How tightly regulated?

I've been looking into this to make a chamber of that general size that 
is around 10-15C and 50% RH  (for incubating sausage duplicating an 
Italian cave<grin>)...

Most kitchen stuff (refrigerators, etc.) tend to have fairly big 
fluctuations of temperature as the compressor cycles, although if you 
put a lot of mass in the controlled space that certainly slows it down.

There are also a variety of things like cold storage (for florists, for 
example) - they tend to be assembled out of simple building blocks: 
insulated wall panels, a cooler unit, a door.

Lab incubators or commercial baking is another source (imagine raising 
bread consistently)

However, all these kinds of applications can easily tolerate a 5C swing 
in temperature since the thing being controlled is fairly massive and 
its internal temperature will vary less.

The challenge with a "small" space is that when the cooling unit comes 
on, you're blasting in cold air, and it's not "well mixed".








>
> Thanks!
> John
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