Sirius observatory

[KenGee]

Has anyone ever lined their Sirius observatory, to help keep it cool?

[jase]

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.

[ChrisM]

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?

Chris

[pluck]

Hi Ken,

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.

Paul

[allan gould]

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.

[KenGee]

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.