Professional help needed
Posted 22 September 2010 - 05:16 AM
There are few straight answers here.
I can tend machines, doing something hourly is no bother. I can get the chips, mill the chips to dust, dry the dust, make 1" briquettes and load the machine and shake the grill. Thats not hard. The discussion here makes me intimidated. Why does the 20 Kwh gen set cost $25,000?
What problems does it have that it takes so much money? I should be able to buy a base set and a then a gen set from eBay for $3,000 and with other messing around be in business for about $7000 making 20 - 30 kwh.
I have gathered wood gas provides a 50% power drop compared to natural gas, I think. That fine, you just get another furnace.
Gasification is one of one of a few options I have. I think I'd like to have a rendering plant. You get about 25 gallons of oil from a dead cow and the MBM can be burned to heat the boiler. Dead cows give meal, oil and water and skin which doesn't burn or digest well so you take that out. That will give me 8 hours of large engine run. Which is 250 Kwh. 1 gal = 10 kwh.
Your machine looks feeble and that makes gasification look like a hobby and not an answer to energy demands. You have a competitor called STAK and he's got some bigger machines. I'm ready to order his small unit to see if I really get the output.
Do you want to add anything to my rant? Please do.
Posted 23 September 2010 - 05:00 AM
I spent a month or two working on what we called a "Chinese straw gasifier" that appears to be the smaller one Stak is selling. I heard that manufacturer over in China was working on some larger ones but the guy who sold us the one I was playing with back in spring of '08 has since gotten out of the business.
These are probably very good basic units but I'd want to get quite a few hour on them and lots of teting to make sure they are producing clean gas.
You mentioned the reduction in power when running on woodgas. What this means is you'll have to over-size the drive engine for the generator head. Cat and other big engine manufacturers are working on big engines to run on biogas but remember, landfill gas is about 50% methane. Woodgas has roughly a tenth the btu as natural gas.
I'd like to play with way to recover some of that lost horsepower through methods such as increased compression ratios, playing with the timing and supercharging the engine.
If you are going to the trouble of making briquettes, what about using a renewable fuel such as paper?
Posted 28 January 2011 - 02:40 AM
First of all, All Power's entire mission is to provide small-scale gasification below the 1 MW level. If you've got a few million to invest, you can get yourself an industrial scale gasifier that'll make some beefy power. Our kit is called the Gasifier Experimenter's Kit because, well, when it came out it was intended as a hobby project. We wanted to put the means to produce syngas in the hands of tinkerers, who would then find a way to use it.
Lots of people didn't want to take the time to couple it to a generator, though, and so we came out with the Power Pallet. We decided nobody was going to invest this kind of money on a good gasifier with a lousy engine. So we selected a top-of-the-line, industrial-quality, long-lasting motor. When you pay $25k for the 20kW, you're buying a GEK with all upgrades ($7k) plus a high-end engine plus a high-end genset plus the mechanic's time to assemble and tune the whole unit. A guy like you SHOULD buy the kit and your own generator and put the thing together yourself. You'll save thousands.
The heat recycling components of the TOTTI are what make the GEK the breakout product in this field, and the best available. Clean gas equals more consistent power and longer engine life. But you're not going to get a megawatt an hour out of the GEK or any other off-the-shelf gasifier. If you'll make 700k a year making 1MW for 12 hours a day, buy five 20kW pallets, make your money back in 520 days. But what's the challenge in that? Perhaps you should take our design and scale it up. Here's a page on the subject:
Posted 28 January 2011 - 04:28 PM
The exciting and glamorous business of rendering dead cows is so exciting and glamorous that New York State extension has published instructions for composting your dead cows on the farm when you can't find anyone to take them after the local knackerman retires and nobody wants his job, so the field is wide open for you, in at least one state. Go for it.
I'm not associated with allpower, I haven't even started building a gasifier yet.
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