[Stoves] Stoves Digest, Vol 11, Issue 38 & My move.

[Carefreeland at aol.com]

In a message dated 7/31/2011 7:34:13 A.M. Eastern Daylight Time,  
tombreed2010 at gmail.com writes:
 
DD: Dan Dimiduk comments

Crispin  and All

Let's explore the plus and minus of preheating secondary  air.  

Certainly, preheating increases efficiency by adding  Joules/gram-degree 
(heat capacity), about 0.7 J/g-C, back into the combustion  process.  If you 
could preheat the air to 300C, that would be 210  J/g.

Consider that the heat of combustion of 10% moisture wood is about  20,000 
J/g.  So, this is about 1% of the energy being released.   That's the plus.



DD I see the biggest advantage of heated primary air to be the low burn  
setting on some stoves. By pre- heating the primary air, the stove thinks it 
is  in full burn mode and should burn hotter and cleaner. Low burn is the 
biggest  problem for producing emissions because of the low temperatures 
associated with  low settings. On the high burn mode pre-heated air helps the most 
with high  moisture biomass. It keeps the steam from quenching the flames. 
All those  energized ions. 
    
DD    My landscaping business is being forced to move  from the farm I have 
been leasing for 30 years. This is due to sale of the  farm to housing 
developers. I am in intense negotiation this week for a lease -  purchase on a 
new 5 acre property. This can go very well, or very bad for me if  
negotiations fall through. Other sites available but more difficult to move  and 
settle into.  Prayers appreciated.
    Hopefully in a few weeks I'll have a great  location to rebuild the 
greenhouse, build a nursery, play with stoves and  other sustainable concepts. 
There will be considerable development needed  on this wooded land. It is 
one mile off the highway, so easy to find for  stovers passing through Dayton, 
Ohio area to enjoy a rest stop. 
    This long term stressful situation is a lot of the  reason I have not 
been as active on the list lately. Maybe if we all think  positive it will 
make things work out hu?  
    Dan Dimiduk 
        Owner, Carefree Landscape  Maintenance since 1980 
        Founder, Shangri- La  Research and Development. since 1990
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