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Surely this must be the end of stove related legislation for now?


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13 minutes ago, Chalgravesteve said:

. If you just keep reheating the moisture laden air, it wont absorb any more water 

 

so it becomes a balance between how much does it cost to get the water out of the air against the cost of heating fresh air drawn from outside to a level that enables the wood to dry in the timescale that is acceptable. 

Yes and yes.

 

I look on it as similarly to the way gas turbines are used to generate most of our electricity, at first they were only used for peak lopping as they sent their exhaust away at over 800C, then someone realised that steam plants operate at no more than 700C steam so they used the exhaust to raise steam and the overall thermal efficiency went up above 50%, in theory the 50C water from the condenser could supply some heating but it is too low a temperature to distribute.

 

Same with the kiln, it cannot be worth condensing the vapour from the kiln exhaust and then feeding it back because the mass flow of the air change is not big enough to transfer the low grade heat from the condensate but if the condensate can run above, say, 30C it could run underfloor heating close by.

 

As you rightly point out it is the extra capital cost of the equipment all the while heat is cheap that militates against it.

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