I've seen Tarm Boilers set up to thermosyphon to 30-40 feet of fin tube in the event of a power outage. there's a normally open zone valve (caleffi makes a wide variety of actuators for their zone valves, including 3 way zone valves, but no DC actuators) that will allow thermosyphoning when the power goes out. important with a super pricey wood gasification boiler in the country.
I'd probably do something like that with my woodstove loop. hoping to do that with my stove here someday. Karl -- Karl Schwingel NABCEP Certified Solar Thermal Installer NorthWind Renewable Energy LLC PO Box 723 Stevens Point, WI 54481 [EMAIL PROTECTED] Cell: 715 209 0446 Fax : 715 952 4501 Roy Butler wrote: > Hi guys, > > I have been using the SS water loop in my Amish wood cookstove > for my domestic hot water for 9 years now. My tank is a 40 gallon > electric water heater (space saver unit) and is configured for thermo > siphon operation. > > The P/T valve is all I have for protection and I have to be honest, > I kind of knew this was probably not a great idea right from the start! > > But it works....the valve opens up and discharges into a piping system > located under a raised bed planting area in our attached green house. > So we get the benefit of the 'waste' heat. The valve opens, on average, > about 1 or 2 times a week during the coldest part of the winter. > > I replace the P/T valve every other heating season because it does > begin to weep a bit. So that may be what's saved my ignorant butt > from being blown to bits.....maybe. > > My question....is there a more robust version of that P/T valve > that I should be using? Something that you would use in a boiler perhaps? > > I'm hoping to not have to change the system too much....I love the > long, guilt free showers....more so because the electricity for the > pump comes from my off-grid hybrid system. > > I'm so much better at PV and wind systems....hot water scares me! > > Roy Butler > NABCEP Certified Solar PV Installer? > NYSERDA eligible PV & wind installer > Four Winds Renewable Energy, LLC > 8902 Route 46 > Arkport, NY 14807 > 607-324-9747 > > www.four-winds-energy.com > www.nationalsolarsupply.com > > Although no trees were killed in the sending of this message, > a large number of electrons were terribly inconvenienced. > > > > > Todd Cory wrote: >> Sure, but the discussion was about preventing hot water storage tanks >> from exploding. Putting BTUs into a tank, whether that be from a wood >> stove loop or 5 kW electric heating element is not the issue. Relying >> on a P/T valve to regulate overheating is of course not a good idea, >> but it will prevent the tank from exploding. >> >> Todd >> >> >> >> Conrad Geyser wrote: >>> >>> Todd, >>> >>> I’m afraid that any PT valves that I’ve ever known have continued to >>> weep indefinitely after one or two overheat triggers. >>> >>> I would not recommend relying on them for heat control devices. >>> >>> Conrad >>> >>> Cotuit Solar >>> >>> NABCEP thermal cert. >>> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> > ------------------------------------------------------------------------ > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > -- Karl Schwingel NABCEP Certified Solar Thermal Installer NorthWind Renewable Energy LLC PO Box 723 Stevens Point, WI 54481 [EMAIL PROTECTED] Cell: 715 209 0446 Fax : 715 952 4501 This e-mail message is confidential, is intended only for the named recipient(s) above, and may contain information that is privileged or exempt from disclosure under applicable law. If you have received this message in error, or are not a named recipient(s), you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this message in error, please immediately notify the sender by return e-mail and delete this e-mail message from your computer. Thank you. _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
