[Gasification] Biomass gas ref. Vol2, Issue15

[Kevin Chisholm]

Dear Jeff

There may be a significant amount of energy required to grind switchgrass 
for fireballing.

If you put in a known weight of switch grass and allow the grinder to 
operate until you judge that the switchgrass is adequately ground, you can 
then calculate an energy requirement, in terms of "watt-minutes of energy 
per pound of switchgrass." (Knowing the amps and volts, you can calculate 
watts of power draw to run the mill.) You can then extrapolate this to 
"kw-hr/ton."

The rocks you use as grinding media should be the hardest, toughest, and 
roundest rocks you can find. That way, you will only use a minimum amount of 
energy wearing away the rocks.

Best wishes with your most interesting work.

Kevin

----- Original Message ----- 
From: "Jeff Davis" <jeff0124 at velocity.net>
To: <gasification at listserv.repp.org>
Sent: Friday, August 18, 2006 8:17 PM
Subject: Re: [Gasification] Biomass gas ref. Vol2, Issue15


> Art wrote:
>> I am pleased to read that you are using multiple rocks to aid in breaking
>> down the switchgrass.  Rock to rock impacts and grinding are much more
>> effective at particle size reduction.
>
>
> And the price is right -- for bugs and rocks!
>
>
> Jeff
>
>
> -- 
> Jeff Davis
>
> Some where 20 miles south of Lake Erie, USA
>
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