greenhouse heating heat buffer

[cortejuan]

Hello,

I tested my stove again by doing an outbreak in order to measure the energy that I can store.

The experiment started at 10:06 am with the ignition of the fire. The bins were at 14,9 degrees. At 10:30 am the fire had reached cruising speed and the temperature started to rise. At 15 p.m., the temperature had reached 32 degrees which makes a storage of:

4,18 x 2 x 17 / 3,6 = 39,4 KWh over a period of 4,5 hours

(I deleted half an hour to take into account the drops in the stove speed among others during the meal). So this gives an hourly storage of 8,8 KWh.

It's not bad because it is sold for a power of 15kW (so 15kWh of energy in one hour). As I only had a fairly moderate fire, 9 kWh seems to me to be quite good given the losses.

cordially

[Did67]

For the insulation you are right, especially since the hearth is strongly cooled by the tubes of the boiler. This stove works well with good wood and well loaded to compensate for the effect of the water-cooled walls.

Me, these cold heat exchangers in the home would worry me. Because it must condense and therefore risk of corrosion?

Or is it a stainless steel tube that coils the fireplace?

For log boilers, a backup system is recommended, with valve calibrated at 60 °, and everything and everything ...

To have less smoke, in fact, it is necessary to have very dry wood. Very quickly after ignition, the combustion will be "clean enough" ...

And for the best performance, it would be necessary to be able to control the draft by closing the door ... The more you set the door open, the more you "dilute" the fumes, but the more calories you also balance for the birds through the duct .. .

[cortejuan]

Hi,

yes, the coil is made of stainless steel to avoid corrosion due to the effects of condensation. In fact, by adding a meter of tube (3 meters in all), the draft is much better with very little smoke.

I have to test again but for the moment it is rather positive, the insulation (low because only 2cm of high density glass wool) is effective, the stove remains at room temperature after 4 hours of operation.

I think you should use very good wood, (oak, hornbeam, beech), very dry and not, like me, various scraps and cutting residues. but one of the goals is also to clean my many attics in which accumulated over generations, planks, doors, rafters, all more damaged one than the other and more filled with nails.

cordially

[bidouille23]

Hello ,

I also find that taking calories in the home is counterproductive:

the temperature for good combustion is therefore hard to reach and above all to be kept

, you could make us a photo of your serpent corté stp corté.

Otherwise for the casing rises to 4 m, here it is nomre in addition to being really more efficient.

Why efficient, because you will have a larger amount of combustion air to enter because of the higher draft, so a possibility to adjust the combustion as well as possible.

Personally in addition to not having smoke I no longer have a smell on leaving the chimney;) .... when I have a smell of wood fire I know immediately that the combustion is not optimum Once .

The solution is to have enough embers to:

1 / maintain the hearth in temperature (mini 570 ° c in the upper part of the hearth) and ideally around 650 ° c, which means that the bottom being the place where the embers are is necessarily hotter, therefore the average must be roughly around 800 ° c)

2 / compensate for the losses due to the consumption of the stove itself (by the conductivity of the stove itself ... (you can therefore re-insulate the outside of the stove this is not bad ....)

By cons you talk to me about glass wool ???

Is that white wool ?? ceramic felt rather than glass wool, right?

glass wool burns, but not rock wool or ceramic.

Rock wool is made from rock that has been cooked like vermiculite or pozzolan, hence their characteristic of fire resistance.

In hydroponics the breads are put in the oven to be cleaned and re-used.

[cortejuan]

Hello,

for the photo I will try but it is not simple because only the upper part is visible, there are several rows of tubes on the rest of the stove I see nothing, but I will do an inspection again and if it is doable (without disassembly) I will post.

Yes, you are right, it is rock wool, not glass, density 100 kg per m3.

3 meters of tube is good, I can not go beyond, I am in the vicinity of the wall of the neighbors and I do not want to pollute their sight even if the stainless steel it is not horrible.

For insulation, I think about it but not in operation, only when it will be very cold. At night, the stove will be turned off and I will maintain a low flow of water (by means of the valves) to prevent the water from freezing in the coil. In order not to lose too many calories, the pipe will be removed, a plug will be placed on the orifice and the stove will be covered with a thermal protection that is easy to install and remove.

cordially

[cortejuan]

Hi,

some news of my installation.

First, I was concerned that I would not have the opportunity to test my wood stove this year. The never-ending winter reassured me ...

First of all, everything works as desired, with 3 meters of outlet pipe. In a day at 5 degrees, the temperature in the tanks rises from 15 degrees to 40 with two wooden baskets.

More quantitatively, an old very worm-eaten fir panel with a surface area of ​​1 m² and 2,5 cm thick, ie a volume of 25 liters, cut into 30 cm sections, raised the temperature of the 2000 liters of water, in 2 hours from 12,9 degrees to 25,3 degrees.

Overall, with night temperatures close to 0 degrees and days at 5 degrees, the stove was lit every 3 days, increasing each time, the temperature at 30 degrees in the tanks. The daily temperature drop (in the tanks) fluctuated between 4 degrees and 6 degrees.

So nothing to say except that the electric heater did not work at all during the last three weeks of March and the wood that I burn is waste not even usable as mulch.

cordially

[Obamot]

Well, that's great good news, and a "great winter" that allowed you to really test your adjustment variables!

So everything is swimming! Total success, congratulations!

[the middle]

Well done cortejean!

[cortejuan]

Re,

thank you for your encouragement, but there is still work to be done because if it works, it still requires, let's say, uh, a certain knowledge of all the parameters, that is to say of all this mess that I installed .. .

My wife asked me several times for me to explain to her, she fled after a few minutes of explanation.

So there must be a simplification shock, it is urgent.

cordially

[chatelot16]

So there must be a simplification shock, it is urgent.

I thought it was still politics ... not for heating or other technique it is easy to simplify ... for politics each simplification is even more complicated