4 ms·
Eventually it'll be hot enough outside that the "cooler" inside is not cool enough without air conditioning.
by kevingadd 5y ago
Eventually it'll be hot enough outside that the "cooler" inside is not cool enough without air conditioning.
- ajuc 5y agoThis is temperature of air (big amplitude) vs temperature of ground X meters undergrounds. If you go deep enough it doesn't matter how hot it is outside - the temperature is basically constant the whole year. http://www.rynekinstalacyjny.pl/images/photos/24/3877/__b_Analiza_CFD_rys_2.jpg http://www.rynekinstalacyjny.pl/images/photos/24/3877/__b_An...
- tullianus 5y agoI'd bet that data is from sensors with low heat dissipation. Unfortuantely, humans produce ~100W of heat each. If you're using a small underground basement as a place to escape lethal heat aboveground, or even a large underground basement with high people/m³, this added heat will steadily increase the basement's wall temperature. The rate of temperature increase depends on physical properties of the basement walls: using the first equation here[0] as an approximation, set x to 0, set q"_o to 100W*(# people)/(basement surface area). α is the thermal diffusivity of the wall material [1]. [0] https://slideplayer.com/slide/1676039/7/images/9/Semi-Infinite+Solid+%28cont.%29.jpg https://slideplayer.com/slide/1676039/7/images/9/Semi-Infini... [1] https://en.wikipedia.org/wiki/Thermal_diffusivity https://en.wikipedia.org/wiki/Thermal_diffusivity