Installation of a wood heater with solar booster

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Thierry 88
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Installation of a wood heater with solar booster




by Thierry 88 » 04/09/08, 17:55

Hello,
Ce forum is a mine of info, congratulations to all, but I did not find the answer to the question that I ask myself.

I'm trying to change my wood boiler to a good thirty years, which works well but is a little too greedy : Cheesy: . I have 260m² habitable to heat.
I will replace it with a wood boiler of last generation classified green flame, but I will couple solar panels. In summer, the solar panels will heat a swimming pool of 40 m3 and the production of sanitary hot water.
I have quotes by installers and obviously, their facilities diverge on two points.

The first quote gives me a boiler of 30KW and 6 solar panels all connected to a buffer tank.

The second quote gives me a boiler of 20KW and 6 solar panels but with two buffer tanks one on the wood boiler and the other on the solar panels.

And this is where I ask myself questions, is it better one or two buffer balloons?

Thank you for your opinions :D
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Christophe
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by Christophe » 04/09/08, 18:03

Strange on the 2ieme quote: the wooden buffer is a buffer ECS or a buffer tank for heating?

Because if it is for the ECS, you would have 2 ECS balloon to manage (it will be necessary to shun that of wood in summer?)? For me it does not work unless it is robotic with a solenoid valve ...

So either it will be in series or parralele.

a) In parallel: when will the 2 be active where will the hot water come from ??

b) In series: I do not see the interest of going through a balloon that is useless in summer.

Unless the guy puts 2 balloon in place of a fair one to increase the total volume?

Here are the plans and photo of our solar installation wood
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Thierry 88
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by Thierry 88 » 04/09/08, 18:22

I'm talking about two buffer balloons, one from 750L and one from 800L.
So I quote with the two balloons quoted above and one with a single ball of 1000L

The balloon for domestic hot water come in supplement, it is a traditional mixed balloon (circuit of heating and electric) which is already on the circuit of heating.
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Christophe
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by Christophe » 04/09/08, 18:28

So buffer balloons for heating only? So 2 is just to increase the capacity and therefore none of these buffer is connected to the solar is that?

How was the energy of your previous boiler buffered?

Can you scan the 2 quote? It may be faster ... do not forget to remove the name of the company ...
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Thierry 88
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by Thierry 88 » 04/09/08, 18:45

My current installation is:
A wood boiler (without buffer tank) on a radiator heating circuit and on a domestic hot water tank with a three-way valve to distribute the heat on the heating circuit and on the hot water tank.
My future installation will be:
We remove the wood boiler and put in place a solar wood installation that will feed the existing hot water tank and the heating circuit

The first estimate of the first installation:

Image

The two quotes for the second installation, but the heating specialist confirmed to me that the two buffer tanks were needed:
Image
Image
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by Christophe » 04/09/08, 19:00

Ok it starts to be clearer ..

A) The boiler morvan mh22 and the CTC PV125 what are the boilers in BUCHES I presume?

What is their respective capacity? (load volume if you prefer)

I tried a method to estimate the volume of a buffer for wood:

https://www.econologie.com/forums/bois-energ ... t4267.html

I found for a 13kW boiler: 2200L buffer ...

B) If I understand the idea of ​​2 quote:

1) no buffer for heating: the solar hot water tank is powered by wood and solar energy.

In terms of comfort you will have the same thing as currently: no heat buffer on the wood, if the boiler does not turn your radiators do not heat up.

2) 2 distinct buffers: a solar and a wood.
It has the advantage of having more inertia but it goes in the 2 sense: heating and cooling. This solution will also be more expensive I presume.

By cons the 1ere boiler is can be oversized (not good with wood) ...

And at the price level?
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Thierry 88
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Registration: 04/09/08, 17:31
Location: Vosges




by Thierry 88 » 04/09/08, 19:18

Christophe wrote:A) The boiler morvan mh22 and the CTC PV125 what are the boilers in BUCHES I presume?


Yes, for 50cm logs

Christophe wrote:What is their respective capacity? (load volume if you prefer)

The CTC PV125 has a focus volume of 120 dm3
The morvan mh22 has a focus volume of 25kg :?:

Christophe wrote:B) If I understand the idea of ​​2 quote:

1) no buffer for heating: the solar hot water tank is powered by wood and solar energy.

In terms of comfort you will have the same thing as currently: no heat buffer on the wood, if the boiler does not turn your radiators do not heat up.

But as both are connected on the same balloon, the solar heats up, and the boiler will just do the temperature supplement, right? and if the solar heats sufficiently, no need to turn the boiler wood, no?


Christophe wrote:2) 2 distinct buffers: a solar and a wood.
It has the advantage of having more inertia but it goes in the 2 sense: heating and cooling. This solution will also be more expensive I presume.


In this case, it will be necessary that in one way or another the two balls are at temperature to go into the heating circuit? if the solar gives only 20 ° how do I recover this heat on the wood boiler? If there is a solenoid valve between the two I will take advantage of the solar if he manages to heat his balloon to the desired temperature?



Christophe wrote:And at the price level?

Well, oddly, the second solution is cheaper 1000 €
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No DIY
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by No DIY » 04/09/08, 19:35

Good evening !!

This post interests me a lot in the sense that I want to "separate" from my not super economical fuel oil boiler but speaking of "savings", I am certainly a little curious but I was wondering the amount of your quotes? .. .

If it's not possible to know too much ...

Thank you in advance : Mrgreen:
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I am a do-it-yourself, and everything that touches the building but I'm caring ... :)
Thierry 88
I discovered econologic
I discovered econologic
posts: 8
Registration: 04/09/08, 17:31
Location: Vosges




by Thierry 88 » 04/09/08, 19:53

Null in DIY wrote:Good evening !!

This post interests me a lot in the sense that I want to "separate" from my not super economical fuel oil boiler but speaking of "savings", I am certainly a little curious but I was wondering the amount of your quotes? .. .

If it's not possible to know too much ...

Thank you in advance : Mrgreen:


The first quote is at 18700 € and the second at 17800 €

Of course the panels will not be on the roof, but embedded in the roof
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Laurent LFC
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by Laurent LFC » 04/09/08, 21:23

Hi, I read the mail a bit diagonally, but the installation Sonnenkraft (the first) is OK for what you want to do.

I advise you to take the catalog Sonnenkraft (available on the net) and you will understand the facilities.

Look at the solar comfort handset (in addition you will have the price HT).

What you are offered is rather more comfort but not with all the elements.

I hope that your two "sellers" have both indicated that the log boiler and the solar installation made a very bad marriage and that this requires a big adjustment (adjustment) otherwise the solar is of no use.

Plus if I compare 15 m² of sensors to 30 kW boiler that means two things.

1) the house really needs 30 kW and the solar (heating) is for fun.

2) the boiler is overestimated.

Good advice, there is a soup in the soup.

Give me STP the type of house (stone), year of construction, volume to be heated, desired indoor temperature, area, and I would tell you the power Maxi boiler.

To give you an order of magnitude with a properly insulated house it is necessary to cover in heating 30% needs 10% of the surface of the house in solar collectors.

A+

ps: if you take a boiler Morvan is really that your wood boiler is really very very outdated (and again I'm nice). it's not really the last scream!
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