[RE-wrenches] solar hot water nighttime recirc

[Conrad Geyser]

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-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at 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.

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