Remundo wrote:
Well we can see that the shredded wood is exactly like the log: idea:
For the pellet, I find the figure a bit optimistic ...
It is not because we post a nice powerpoint that the data is reliable.
In this case, that the log and the plate, it is kif kif worries me. Except to take a log which comes from Lithuania ... Whether with 60 CV going slowly or with 120 CV going fast, it will be hard to make me believe that grinding is neutral in the CO² balance! And, as a first approximation, the rest is actually kif kif. Afterwards, you can quibble: count the chainsaw for the logs and not for the pads (assuming that these are usually lost falls ...), etc ...
And that the pellets, that is 2,7%, leaves me even more perplexed. Part of the answer is in the asterisk: "from dry sawdust" Knowing that dry wood has about 20% humidity (so sawdust too, and you do not often saw dry wood) and that the pellets are at 8% ....
For the rest, I still correct my a priori and therefore false statements:
1) For the same boiler (high-end, Hargassner), tested by an independent body, the emissions with platelets at 20% humidity and with pellets are not significantly different. I can give you the numbers. But it's probably the Rolls of burning platelets (and pellets) ... And I don't know what that gives with 30 or 40% platelets (at 20%, these are naturally dried platelets) .
2) On the following site, a powerpoint for a study - dating from 2005 - therefore today distorted with regard to costs and the economic part), including emissions, between the different possible heating modes. From left to right: natural gas, wood chips, fuel, cocke, pellets and liquid gas. The legends should help you find your way around. Detached house, in Austria (Linz - the plain), 150 m², renovated in 80 ...
http://www.brennstoffvergleich.at/beisp ... Altbau.pdf