[Stoves] Traditonal Charcola Making Process / retort

[Kevin Chisholm]

Dear Jeff

Goodness Gracious, you are sharp tonight!!

((What do you mean... sharp tonight??? Jeff is sharp ALL the time!! :-)

I did indeed overlook the fact that Crispin wanted to run his gasifier 
in char producing mode.

The char production would probably be in the range of 20% of the initial 
bone dry biomass. this would result in about 30% of the original biomass 
energy leaving the system as char.

In other words, only 70% of the wood energy is gasified, and 30% leaves 
as char. Accordingly, he would need 4.78/.7 = 6.83 kG per hour of 15% 
moisture wood, to yield sufficient gas energy to run his engine 
producing 3.5 kW electricity and about 1.37 kG/hr char.

Sorry for the oversight, and thanks for cvatching it.

Best wishes,

Kevin

Jeff Davis wrote:
> Dear Kevin,
> 
> 
> I was wondering if, in your calculation, you made allowance for the 
> charcoal or was that in regards to a ash producing gasifier?
> 
> 
> Best regards,
> 
> 
> Jeff
> 
> 
> 
> Kevin wrote:
>> I would say that you would need a 1,500 RPM engine of about 750 CC 
>> displacement, Spark Ignition, to produce 4.0 kW of Shaft Power, 
>> delivering about 3.5 kW of electrical power. (I assume you need 50
>> Hz power.)
>> 
>> You would probably need about 4.78 kG/Hr of wood at 15% MC,
>> yielding about 10.5 M^3/hr gas.
>> 
>> Such an engine run at 1800 RPM could produce up to about 4.2 kW 
>> electric, but would require about 5.74kG/hr of wood.
> 
> 
> 
> 
>