I wonder if the foil faced foam would work without having to paint and stucco.
Cameron On Mon, Jul 16, 2018 at 10:07 AM, Chuck McCown <[email protected]> wrote: > Doesn’t look like I emailed the test results to anyone. > We started adding foam insulation with stucco and then white paint on the > exterior of lots of stuff. > An amazing combination. > > *From:* Chuck McCown > *Sent:* Monday, July 16, 2018 9:00 AM > *To:* AnimalFarm Microwave Users Group > *Subject:* Re: [AFMUG] How to reliably cool a small enclosure in direct > sunlight? > > Here is one snippit about exterior insulation: > > > Infrared camera proved what I proved years ago. The exterior insulation > does the trick. A wall in shade is the same temperature (inside) as a > wall > in sun. Therefore, false roof does not decrease heat flux. I spent one > whole summer testing all these assertions. Multiple boxes with telemetry. > Paint, sun shades, vents, etc etc. White paint and exterior insulation > does > the job. Nothing measurable came from adding a shade to that combination. > > But to prove it once again, I had Jeremy use the infrared camera to > measure > all the walls and ceiling in Ticaboo. Sunny walls were no warmer than > those > on the shade side. > > > *From:* Lewis Bergman > *Sent:* Monday, July 16, 2018 8:54 AM > *To:* AnimalFarm Microwave Users Group > *Subject:* Re: [AFMUG] How to reliably cool a small enclosure in direct > sunlight? > > On peltier you also have to locate the power supply outside of the box. Or > at least that is what I found. The heat load from the PS was always more > than the peltier it powered could keep up with. Everything has a bit of > inefficiency built in that shows up as heat. > > On Mon, Jul 16, 2018 at 9:52 AM Lewis Bergman <[email protected]> > wrote: > >> Are you saying white paint outperformed heat shields? That's awesome >> info. I always thought heart shields were the best. >> >> >> On Fri, Jul 13, 2018, 7:43 PM <[email protected]> wrote: >> >>> I did a bunch of trials one summer testing a variety of methods >>> including heat shields, exterior insulation, interior insulation, >>> convection ventilation, forced ventilation, peltier effect active cooling. >>> >>> #1 by a long shot is painting the enclosure bright white. >>> >>> >>> *From:* Bill Prince >>> *Sent:* Friday, July 13, 2018 6:37 PM >>> *To:* [email protected] >>> *Subject:* Re: [AFMUG] How to reliably cool a small enclosure in direct >>> sunlight? >>> >>> >>> 1. Add a thermostatically controlled ventilation fan >>> >>> 2. Put a heat shield up on the south side of the enclosure. This can be >>> just a plate of aluminum, painted white on the sun side, and mounted to the >>> enclosure with 1" standoffs >>> >>> We have a site like yours, and just the fan keeps the temperature below >>> 120° F (49° C). I think if we added the heat shield we could drop it >>> another 10° F. >>> >>> >>> >>> bp >>> <part15sbs{at}gmail{dot}com> >>> >>> >>> On 7/13/2018 4:51 PM, Sterling Jacobson wrote: >>> >>> I’ve got a few side of the house enclosures exposed to direct sunlight >>> part of the day. >>> >>> >>> >>> Inside the electronics are about ready to melt. Like 90C+ CPU temps. >>> >>> >>> >>> These are about 3’ x 3’ x 12 deep or something like that, so not a lot >>> of room. >>> >>> >>> >>> What are you guys using to keep these things decently cool? >>> >>> >>> >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> ------------------------------ > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > >
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