CurtPalme.com Home Theater Forum

[mc86]

My lab has a fancy pants thermal imaging camera which I brought home today for, uhm, important work-related activities such as estimating the Grashof number on a bank vertical heat fins. Fortunately, the CRT has such a heat exchanger. I gotta say of all the toy-like tools I have at "work" this one never grows tiresome. Coupled with multiphysics package (COMSOL), it kicks serious butt. Mostly, I am surprised at how often my intuition is wrong.

I didn't know the deflection yokes would get warm like they do - maybe ~40C after 30mins. I was also surprised by the outlet temp of HVPS area fan...I'm going to do further study on this (pulling the hvps cover).

I'm also tempted to take shots of the boards with the extender card installed to see if there are any big surprises, tho' not sure what if anything I'd do. I also want to pull a lens to watch the tube face. Maybe next summer!

Matt

[Tinman]

I remember when I posted my first FLIR shots of my projector. I thought I was setting a new standard.

Though you won't actually see an image on the CRT faces....

Don't recall where those shots are, though.

EDIT: Never mind, see this thread. http://www.curtpalme.com/forum/viewtopic.php?p=93271&highlight=#93271

Good times!

Marc

[mc86]

Marc -

Nah, I know it only sees the surface temp of the glass (and that a bit poorly). Presuming steady-state is reached, Fourier gets us to the avg interior glass wall temp (and a lower limit fluid temp) easily enough. Of course, I oughta' just stick a 0.050" TC down into the fluid and be done with it.

Did you learn anything from your thermographic imaging?

Of course, if I point the tubes toward the sky, make a silicone dam around the circumference of a tube, and carefully fill the dam with optical fluid it could be done (though the nat'l convection would be different).

BTW, how much is you sig line renting for nowadays? I was thinking "digital...not that there is anything wrong with that" OR "black: gone, but not forgotten"

Matt

[stridsvognen]

I don't know how much you study, and how experienced you are with your thermographic camera, i played with one once, and was a lot of work just adjusting the camera to all kinds of different surfaces.. depending on material, color and how shiny, the surface is.

So if you just take a pic, of a surface with mixed materials, you need a lot of experience to put the right value on the material/ component and calculate the temperature right.

[Ile]

Here's few old thermo pictures of my BG808s.
https://www.curtpalme.com/forum_archived/viewtopic.php@t=13103.html