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 >> >
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