joukeder skrev:The best result I have now is presented here:
http://www.beara.org/stg4.jpg
Main changes are:
I keep the burner grate much cleaner by brushing it twice a week (Do other people need to do that?)
I have set the I factor in PID to 10 in stead of 100
I have set Oxygen regulation to 25 from 100.
What do you think?
I am still perturbed by the fact that my 24Kw boiler does not come to over 17 KW. It takes more then one hour to get the temp up to 50 degr C.
How do I see that the Biocomfort boiler is 24KW?
My other boiler that is 16KW looks exactly the same.....
Regards
Jouke
hi Joukeder
Yes, I think it loooks quite good now.
I have tryed to notice my own oxygen level for a while with automatig oxygen control switched on.
I can see that when i have much crushed pellets in my auger pipe, it deviates a lot more than when I have a clean Auger pipe.
And I think that is your main problem too, because the deviation in auger feed is very variable, when you have a lot of crushed pellets in the pipe, and it's a bigger problem with high angle on the pipe.
It's quite easy to here when the pellets is falling down into the burner, that the amount deviates, and if the oxygen control try'es to compensate for this, it actually does the oxygen changes problem bigger. By limiting the regulation to 25, you obtaine to adjust slower, and thereby only adjust for more staing changes and not for the iregular changes from the auger, so thats good.
What I do to limit the problem is to add some food-oil to the bottom of the pipe from time to time.
very little can do the trick to bind the crushed pellets, so they are feeded instead of staying in the pipe. Only 1 liter per 1-2 month can do it. feeded with very small amount per time.
her are a link to an example of such a device
http://www.woodville.dk/index.php?entry ... 011-190819
About the effekt of your burner, The burner itself is the same for 16 and 24 KW, only the settings deviate. And then the Auger is bigger.
The High blower settings is an indication of the KW. It's almost the same value as the maximum effekt. Ie is 'it about 24 your burner/auger is for 24 KW. And about 16 it's a 16 KW burner.
And I think that an Auger for 24 KW is more unstable than a 16 KW because it's bigger so that extends your oxygen problem too.