View Full Version here: : Sirius observatory
06-08-2011, 09:07 PM
Has anyone ever lined their Sirius observatory, to help keep it cool?
Can't say I've heard of anyone installing lining to keep inside the dome cool, Ken. The Sirius extractor fan kit would certainly assist with air flow during hot days. I haven't had the need to install one. If I'm not mistaken the dome is 'double walled' to assist in both heat and strength.
07-08-2011, 10:32 AM
I think that lining an observatory may be a double-edged sword because at night time, you actually want the inside temperature to mirror the outside temperature, and having insulation in the way could slow that process. I suspect that if insulation were added carefully, there could be an overall benefit.
As Jase indicated, managing the air flow is a smart move, as is having a reflective external surface.
The whole question of heat transfer reminds me of the teaser about cooling a cup of tea: Are you better off letting it cool for a few minutes and then adding milk, or putting the milk in and then letting it cool?
08-08-2011, 10:48 AM
I presume you're talking about the walls only? The problem in my mind would be the dome. That's a large amount of un-insulated surface area in contact with the air which probably would negate the effect of insulating the walls.
Interesting idea though.
08-08-2011, 11:07 AM
The domes keep remarkably cool even during very hot weather. The problem can be moisture and so some sort of ventilation is needed. Never had a problem with the obs being too hot.
08-08-2011, 10:41 PM
Thanks for the reply's guys, yes it's a hard call. I've had the observatory for a few years now. It's has been in my backyard, Whyalla it gets very hot. 40+ is not uncommon, I've had a air conditioner in to take the edge off the really hot days. I'm moving it to a dark site where it will not have an aircon.
I'm just a bit concerned I just I'll get over it.
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