-------- In message <cabbxvhuzlkkwkyyp_v68a+gk0rnksw9ro-trv77-c7ndt3w...@mail.gmail.com>, Chris Albert son writes:
>[...] the water comping out of the pipe is always about 58F. Unless you live close to a volcano or an artesian spring, the temperature will be exactly the yearly average air-temperature of your climate. Precisely how deep you need to dig for stability that varies with your geology and precipitation, it may be as little as one meter, it may be as deep as 10 meters. >My point here is that if you really want to keep something at constant >temperature what you want is huge amounts of dirt, rock or concrete, not so >much a heater/cooler This is certainly true for any passive object, but as soon as we talk about heat-emitting objects, this no longer holds, and you have to take thermal conductivity, -capacity and -impendance into account. If you happen to dig a deep trench anyway, by all means plonk a PE40 tube down there to run liquid through, but unless you are *really* dedicated, don't start digging just for constant temperature. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ 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.
