One other thought, on some vacuum tube collectors, if I remember correctly, you can simply remove some of the tubes.
Brad Bassett On Sun, Jun 15, 2025 at 7:35 PM Bradley Bassett <[email protected]> wrote: > When I found that my system was somewhat oversized, I plumbed in a mixing > valve and a heat dump radiator (a few Cu pipes) in the crawl space to dump > the heat. It's on the solar supply line and it works like a charm. It > actually adds a very modest amount of heat to the crawl space, not enough > to notice. It's going on 20 years without any issues, probably because it's > an anti-freeze system so no mineral buildup in the mixing valve. I've also > heard of using a fin radiator under the eve for this instead of the crawl > space. The crawl space was easier for me. > > Brad Bassett > > On Sun, Jun 15, 2025 at 5:02 PM david quattro via RE-wrenches < > [email protected]> wrote: > >> There must be a variable mixing valve that is informed and controlled by >> a thermocouple >> >> >> >> On Sun, Jun 15, 2025 at 4:46 PM Jay via RE-wrenches < >> [email protected]> wrote: >> >>> Hi all >>> >>> I’ve inherited an incorrectly sized solar thermal evacuated tube system. >>> It’s too many tubes for the use most of the year. >>> >>> Does anyone know of a design or product that can remotely cover them? >>> I can find shade cloth of course that I can cover them but something >>> remote control would be better >>> >>> Thx >>> Jay >>> >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> Pay optional member dues here: http://re-wrenches.org >>> >>> List Address: [email protected] >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> There are two list archives for searching. When one doesn't work, try >>> the other: >>> https://www.mail-archive.com/[email protected]/ >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> >>> List rules & etiquette: >>> http://www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> http://www.members.re-wrenches.org >>> >>> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >>
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