[time-nuts] Temp/Humidity control systems?
jimlux at earthlink.net
Thu Oct 27 09:06:57 EDT 2016
On 10/27/16 2:17 AM, David J Taylor wrote:
> From: jimlux
> You can buy the smallest "window" airconditioner and "plumb" it to your
> chamber (I used dryer vent hose, cardboard, and lots of duct tape)
> Attached is a plot temperature and RH of an insulated box about 1.2
> meter wide, 2 meters tall and 60 cm deep, filled with 100 or so 750 ml
> bottles of liquid.
> The temperature is fairly stable, but the RH varies wildly - basically,
> when the AC unit kicks on, it sucks all the water out of the air in the
> box, and then, when it turns off, the (damp) walls of the box rapidly
> rehumidify the air.
> Thanks for that, Jim, and for the graph.
> Your graph suggests to me that using /any/ form of artificial control
> may give worse short-term results than simply leaving an underground,
> uninhabited room with outside walls just "as-is". The slow daily
> variations may be far more tolerable than excursions due to heaters etc.
> being switched on and off.
Indeed.. a large mass varies slowly.
(hence the suggestions in previous years for finding caves, digging a
mine shaft, etc)
More information about the time-nuts