Kelly, I have installed several of the Metrima BTU/KWH meters for SHW. The kit comes with a flowmeter, temperature sensors and wells (hot and cold), and a calculator, nicely integrated. These are utility grade meters and more economical than the hardware you mentioned(dealer price $425). Check out TCT Solar ( http://www.tctsolar.com/ the US distributor). The only downside is that the units are BSP thread ( adapters to NPT are provided in the kit to drop the temperature wells and the flow meter into a 3/4" NPT line). I guess if we deployed more of these in the US we'd have NPT as a standard option. Another use I've found for these units is they allow me to adjustment for offsets in the tank temperature sensor vs the actual hot water temperature ( 2 - 10 degrees typical), and adjust the high limit set point accordingly. I like the fact that customers can look at the kWh of energy delivered by the SHW system and easily convert to $$savings. Larger units are available for higher flow rates/pipe sizes.
Cheers Carl On Fri, Nov 14, 2008 at 9:50 AM, Kelly Keilwitz, Whidbey Sun & Wind < [EMAIL PROTECTED]> wrote: > Thermal wrenches, > We have a customer who wants to log the energy gain of his SHW system. > The only viable option we've found is by Resol (also rebranded by Caleffi) > which includes their top-line controller (~$280) in conjunction with their > data logger, DL-2 ($500). With markup and installation this system will > cost > our customer over $1K. > > Are there any other AFFORDABLE options out there, that include data logging > to a computer or web interface? > > Thanks, > -Kelly > > Kelly Keilwitz, P.E. > Whidbey Sun & Wind, LLC > Renewable Energy Systems > NABCEP Certified PV Installer > 987 Wanamaker Rd, > Coupeville, WA 98239 > PH & FAX 360-678-7131 > [EMAIL PROTECTED] > > > > > _______________________________________________ > 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 > >
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