Doctor Drivel wrote:
wrote in message

The solar section is at the bottom
with the DHW top, CH middle and solar
bottom.


DHW is usually not as hot as CH, 65 versus anything upto 82, so an
unusual choice. Why choose to heat dhw to above its use temp, to extend heat
capacity?


It is clear you don't understand the principle of heat banks.thermal stores.
the DHW stored water is between 70-85C to instantly heat the incoming water.

What is clear is you didnt fully describe your proposed system. Now we
know which body of water is in the tank. And we also know that this
approach makes solar collection less efficient, which is why I had
initially guessed you had the DHW in the tank, being drawn off at the
top for the taps. This would be more efficient.


No CH return to the solar section,
only the middle CH section.
Using a plate heat exchanger the
return from the DHW can be directly into
the bottom of the cylidner in the solar section.

return from DHW? whats that?
where does the plate exchanger
connect in your scheme (it has 4
connections)


It is clear you need to understand how they work. See
http://www.heatweb.com That gives good explanations. No se sens ein
continuing until you understand, you think about it and then form questions.

Either describe your setup or dont.


NT