To some of the more learned members of this forum.

[Rupe]

The original post says 8kg at 32% moisture therefore just under 1/3 is water. If this is the case and you dried it completely then you would have 5.44kg of wood left at 0% moisture. The add your 11% of 5.44kg and you get 6.03kg.

 

 

Still not quit but nearly. the answer is 6.11 kgs.

 

You are correct except you dont add 11% of 5.44, instead you work it so that 5.44 is 89%, its that difference that was confusing us, you got the first bit right.

 

68% of 8kgs is 5.44 and if 5.44 is 89% of the finish then it weighs 6.11kgs

[Kev Stephenson]

You can have wood with 200 % moisture content

 

Depends on definition - you could have wood with 200% added moisture vs dry weight but it doesn't make sense as you are not adding anything you are removing the moisture by drying. 100% is the starting point not the end point therefore when you cut the wood it is 100%, this reduces as you dry it.

 

Also selling wood calculated the second way gives a lower %moisture figure which looks better.

[Rupe]

its 8kgs x 68 divided by 89 = 6.11kgs. thank you.

[Rupe]

8kgs started off being 68% wood and ended up being 89% wood.

[Dean Lofthouse]

Depends on definition - you could have wood with 200% added moisture vs dry weight but it doesn't make sense as you are not adding anything you are removing the moisture by drying. .

 

Thats how the moisture content of wood is calculated

 

150% moisture content is 150% weight of the dried wood.

 

So Balsa wood can have a huge moisture percentage

[Kev Stephenson]

Thats how the moisture content of wood is calculated

 

150% moisture content is 150% weight of the dried wood.

 

So Balsa wood can have a huge moisture percentage

 

If thats the case then Rupes calculation wouldn't work.

 

If your wood is originally 200% moisture how does Rupes calculation (100% - %moisture@ start = initial multiplier) work?

[Dean Lofthouse]

8kgs started off being 68% wood and ended up being 89% wood.

 

If thats the case then Rupes calculation wouldn't work.

 

If your wood is originally 200% moisture how does Rupes calculation (100% - %moisture@ start = initial multiplier) work?

 

As above

[Stephen Blair]

i am totally lost now, i will back out now. good luck:001_smile:

[Dean Lofthouse]

200% moisture content wood is:

 

200% moisture + 100% wood + 300% total

 

or

 

2kg moisture + 1kg wood = 3kg altogether

[Kev Stephenson]

I see where you are coming from but if the original said 8kg @ 200% what does the calc look like?

 

200% states there is 2x as much water as wood therefore it is 8kg x 0.33 or 100/(100+200).

 

Does this mean that in the original example it should be 8kg x 100/(100+32) = 6.06kg dry

 

6.06 x (100+11) / 100 = 6.72kg @ 11%