HI Yes you are correct, a panel will lose less than they collect. BUT the Frul will tell you the amount of loss you could expect. If no one calculates I will do it early next week. Darryl
--- On Fri, 12/18/09, Carl Emerson <freepo...@freepower.co.nz> wrote: > From: Carl Emerson <freepo...@freepower.co.nz> > Subject: Re: [RE-wrenches] solar hot water nighttime recirc > To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org> > Date: Friday, December 18, 2009, 9:04 PM > > > > > > > > > > > > > > > > Hi there > gang, > > > > Just to say > that IMHO solar thermal panels > will radiate quite a bit less than they collect, someone > must have some data on > this ?? > > > > Have a > great Christmas. > > > > > > Carl > Emerson > > Free > Power Ltd. > > Web > www.freepower.co.nz > > > > > > > > > > > > > > From: > re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Conrad Geyser > > Sent: 18 > December 2009 5:42 p.m. > > To: > npon...@buildingenergyus.com; > 'RE-wrenches' > > Subject: Re: > [RE-wrenches] solar > hot water nighttime recirc > > > > > > Nicholas, > > > > You > can certainly do > that. Most newer controllers have a > “vacation” function that > will provide this. Another method is to put in a > bypass to the check > valve that you can open and the system will naturally > reverse thermo siphon at night. > Not much in the way of calculations other than the > collectors reradiate > as effectively as they collect. > > > > Conrad > > Cotuit > Solar > > > > > > > > > > > > From: > re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nicholas > Ponzio > > Sent: > Wednesday, December 16, 2009 > 10:54 PM > > To: > RE-wrenches > > Subject: > [RE-wrenches] solar hot > water nighttime recirc > > > > > > Apologies if this has > already been discussed here. > > > > One heat diversion method I hear suggested often is > recirculating through the > collectors (flatplate) at night. Are there any data, > calculations or anecdotal > evidence on the effectiveness of this approach? That is, > can I really radiate > as much energy back to a dark sky as I collect during the > day? > > > > Thanks for any feedback. > > > > > > __________ NOD32 4697 (20091217) Information __________ > > > > This message was checked by NOD32 antivirus system. > > http://www.eset.com > > > > > > > > -----Inline Attachment Follows----- > > _______________________________________________ > 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
