-------- In message <canx10hcaob-5gysbr7sdxwl7dyh7qubmhxwmi9xdrcf3mdm...@mail.gmail.com> , "Dr. David Kirkby (Kirkby Microwave Ltd)" writes:
>> Geothermal means you drill at least 50m (Iceland) or more likely >> half a kilometer down, in order to harvest water at near boiling >> point from the Earths geological heat-sources (mostly uranium decay). > >Sorry. What he installs is pipes in the ground in residential or >industrial sites. Basically he says they work initially, but performance >drops dramatically over a couple of years. That is not "geothermal" then, and yes, a LOT of those systems are badly underdimensioned. I've been researching this topic intensively because my new house will be heated that way. My conclusion, based on reading a lot of reports, is that there is no credible way to predict the performance. The wetter your soil the better, but that's about it. I'm going to overprovision by a factor two to be on the safe side, afterall it only costs EUR7 for each extra meter of pipe. -- 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.
