Annual consumption of pellet boiler OKOFEN

[Did67]

No no !!!

This magnet / sensor system just picks up the number of turns. So the lengths of the stems do not matter. It just has to "fit" under the hood.

Afterwards, the counter (my God he is stupid!) Believes that it is a bicycle. And you have to set the fictitious diameter of the wheel (of the bike that does not exist).

The odometer will display km.

As you know the perimeter of the fictitious wheel, you will be able to convert into number of turns.

But even more simple is to directly convert "so many and so many km = so many and so many kg of pellets".

And there, setting the diameter can help find a round figure, easier to remember!

[Chaboum]

Thank you !! So the setting of the fictitious diameter of the wheel is the same for all of us !! since we have the same "wheel" on our Okofen ??? And to have 1km = 1 kilo of pellet, what did you put as a diameter? (because there, my silo is full !!! so I cannot measure in bags of pellets !!)

thank you !!!

[Jacko]

I put 2.752 m in diameter and that gives me 10kg per km on a 25KW.
A+

[Did67]

@ chaboum:

We have the same boiler, but the "bicycle wheel" is virtual !!! So depending on the settings made after starting up (or replacing the batteries), each recorded lap corresponds to a different displayed distance (therefore "virtual").

To swallow 5 kg of pellets, our boilers will make eg (I say anything) 230 turns of the screw (supply of pellets). This is what the sensor diverted from its function records ...

If you put 2 m as the "virtual" turn of the wheel when configuring, this will correspond to 460 virtual meters of the route. And you will have as "coefficients" 1 km displayed = 5 kg / 0,46

Whoever puts 3 will be 690 m. Your coefficient will then be 5 km / 0,69

It all depends on the "wrong" wheel diameter you have entered. Remember, the computer always thinks it is counting bicycle wheel revolutions!

@jacko

The 25 kW is another "series". I guess the burner is not the same, so the lead screw. I'm not sure though ...

[fbedon]

Hello,
I'm talking about the configuration that I know, a textile silo located near the boiler, I can't say anything about those equipped with a suction system.

I think that the bike odometer should not be put on the burner supply screw, but on the one that we know always works full, that is to say the one that comes from the silo.
Indeed, the burner supply screw is behind the fire stop valve, and so that this valve operates without constraint, the screw advances faster than the previous one, without there being a constant ratio since it is not the same engine.
Fred

[Jacko]

Hello everyone,
little up ...
I did some comparative tests of pellets in order to determine which pellets are the most "energetic". I thought to make the correlation between the number of turns of the screw and the t ° of the flame.
It was then that I noticed that it did not hold up too well because the flow rate per turn of the screw is strongly influenced by the length of the pellets ... What is strange is that the xylets were the longest that they give the highest gr / turn ...

Km Dia wheel Kgs Gr / turn
Badger 875 3 8000 27.4
Henetton 21.6 2.752 135 17.2
Xylets 9.1 2.752 120 36.3
Eifuel 16 2.752 60 10.3

I intend to repeat this test with a little more precision in order to create a graph with the burner temperature / gr instead of the burner temperature / turn of the screw as below.
We can see on this graph that there are already nice differences between the brands.

@+

[dirk pitt]

I am amazed at what you say.
the volume contained in one turn of the auger should depend very little on the length of the pellets.
the bulk density of a pellet volume should be approximately always the same as they fill the space in a uniform and random manner.
of course if we pushed the dimensions very far, the volume would be better filled with an extra short pellet than with an extra long pellet but I'm still surprised that there is so much difference

[Jacko]

I too am surprised to see such differences: 10gr / turn or 36 gr / turn ... it's not possible ...
This is why I will repeat the test with more precision:

* compare the same quantity of pellets
* During a similar heating period (weather)
* By allowing the hopper to empty completely between each type of pellets
* By measuring the apparent density (and perhaps the real one)

Incidentally, I will also try to measure the relative humidity because the packaging and the storage conditions often surprise me ...

[doodlidoo]

Hello,

I'm going through this forum and I see that you have installed a bike computer on your Okofen boiler!

I also have this model of boiler?

Did you put it on the wheel at the bottom right directly connected to the engine?

What are the settings of your counter?

Can you remind me of the consumption / turn of the wheel?

Otherwise do you have enough perspective to be on your consumption compared to the figure on the meter?

oliv '

I am amazed at what you say.
the volume contained in one turn of the auger should depend very little on the length of the pellets.
the bulk density of a pellet volume should be approximately always the same as they fill the space in a uniform and random manner.
of course if we pushed the dimensions very far, the volume would be better filled with an extra short pellet than with an extra long pellet but I'm still surprised that there is so much difference