Re: [ATM] New Mirror Cooling simulation software

["Arjan te Marvelde" <Arjan.te.Marvelde@hetnet.nl>]

Hello Robert,

A very nice piece of software, and the graphs indeed look familiar...
Can you do something similar for the side support evaluation you did on your 
website?

Out of curiosity, how do you calculate radiation loss? When doing mine, I 
was wondering what temperature to enter for the cold side (the mirror is 
radiating to): this should differ considerably between closed and open tube.
- For an open tube, the mirror sees a lot of sky, and the effective temp 
will be down to 200K (i.e. ~13 W/m2).
- For a closed tube, I guess it will be more tending to ambient (i.e. ~0 
W/m2)?

In the first case the radiative loss is of the same order as free 
convection, in the second case ... It seems an important factor in the 
calculation when not using fans for temp stabilization.

   Arjan

> Arjan's page at http://home.hetnet.nl/~artm/atm/articles/cooling.html
> was one of the independent validation benchmarks for my program. If you
> plug in the numbers for the 4 cases that Arjan computes on his page,
> you'll find that MirrorCooling produces exactly the same graphs.

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