I'm not sure I follow the insulation is bad argument, thermal time constant = RC, better insulation, longer time constant.
On Thu, Oct 27, 2016 at 12:37 PM, Mike Naruta AA8K <[email protected]> wrote: > On 10/27/2016 03:41 AM, Poul-Henning Kamp wrote: > >> Over insulating is a 100% sure-fire way to get unstable temperature >> inside, >> because it amplifies the consequences of any change in power dissipation. >> >> It is a classic mistake to build a 100mm insulated enclosure inside an >> office-like environment and end up having less stable temperature on >> the inside than the outside. >> >> Cinder blocks is a much better material for that scenario, because they >> have both thermal mass and inertia (= heat capacity and heat impedance) >> > > > True Poul-Henning Kamp. > > > My application was to ecologically stabilize a room exposed to outside > weather. I am pleased to see the heater rarely come on, even on cold > Winter days. I attribute that to the insulation and equipment mass > (half-century old computer, avionics, and amateur radio equipment). Even > in the Summer heat, the room stays cooler than air temperature (barn roof > and day/night averaging?). > > John's Georgia basement may also enjoy natural cooling and thermal > inertia. Cinder blocks may be optimal. We really need to know John's goal > and existing conditions. > > > > Mike - AA8K > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
