The solar installation wood Tigger with thermal buffer

[tigrou_838]

exactly christophe, it will be necessary to cover it well, especially for the losses of the night, the best would be a covered swimming pool, inside in a well insulated building, and in addition a good thermal cover above to avoid losses.


tigrou

[Christophe]

tigrou

Uh, should we call you Jesus now?

[tigrou_838]

uh no, tigger that will be enough, and xxxx for relatives.

tigger, well, just this one then

[mroutin]

Good evening everyone,
I tinkered with an installation with 9m² of panels and a storage tank of 1500l of water. I have a coil which is immersed inside this tank and which heats or preheats my DHW before the classic electric cumulus. The regulation is ensured by an industrial automaton that I programmed.
I have a temperature problem in my electric water heater. Often, it does not start heating and suddenly my DHW is not hot enough.
I wonder if the fact of bringing it warm or hot water (between 30 and 50 ° C) does not make it bug its thermal regulation.
Have you had this problem in your cumulus solar hot water supply?

Thank you in advance.

Manuel

[toto65]

I don't have DHW. But I would love to see your installation. could you send us some pictures?
thank you, talk to you later

[tigrou_838]

Hello

to answer mroutin, i do not have this kind of problem, my 200litres solar balloon and in series with the electric cumulus 200l and biweekly.

at this moment it is water preheated to 65degrees which enters the electric cumulus, so it does not trigger, when the solar preheating is at 30 to 50degrees (in winter); the electric cumulus heats up just enough to go up to 60 ° during off-peak hours.

make us a diagram or plan and photos for a little better try to understand where is the problem.

I do not understand this kind of problem, maybe technical problem on the regulation incorporated in the cum elect.

how old is the cum elect; the model etc ...

the connection of your regulation etc .....


tigrou

[mroutin]

Thank you for your answers

I send you some photos this WE.

Routin manual

[mroutin]

Hi,

Here is a small summary of my installation which has been working since March 2008.

I have an electric cumulus of Castorama brand, vertical 300l. And I have the impression that when I send water in its lower part at 40 ° C, for example, its control system does not think of triggering the heating. I wonder if for him if the bottom of the water heater is at 40 ° C, it is because the top is at 70 ° C for example.

Tigger, how much do you regulate the DHW temperature of your electric cumulus? Mine is relatively low (<60 ° C) anyway. Could this be the beginning of an explanation?

Here is the attached file in PDF.
Good reading.
https://www.econologie.info/share/partag ... OMpcSV.pdf
Manuel

[ulyssesourd]

mbroutin,
As you heat dead water, it takes time to heat the 1500L (several days in a row ...) so to increase the efficiency, I think the coil 300m of 16mm, in which 'SANITARY COLD WATER is preheated, is too short compared to the volume of water in your cumulus (300L). Because the volume of water preheated in the coil has a volume of 0.016 * 300 * 3.14 = 15L. It is better to have at least 1/4 of the 300 liters or 75L so you would have to put ... 1500m of 16mm pipes or 1000m of 22mm or take a smaller cumulus ... at the rate of 30L / person / day if you are 4 and very economical 120L are enough ... Or another alternative, plunge into the dead water tank, an old DHW tank stripped of insulation ...
A+

[tigrou_838]

hello mroutin

I saw your diagram, and I do not understand why the thermostat in your accumulations does not trigger, is it properly connected, if you try to put it fully in one direction as in the other, may be the resistance to check.

if it is set at 60 degrees, the thermotast being at the bottom, should trigger this to raise the water temp from 40 to 60 with the resistance.

So to check, the connection of the resistance, the adjustment, the thermostat, I rather think of an electrical problem.

I also have a 200l of casto and in series (preheating) the solar 200l, and everything works perfectly.

tigrou