Mike Jay wrote:
My thought would be to use a wood fired electrical generation method during those two months whenever the batteries get low. Is there such a thing for residential scale applications?
Mike Jay wrote: Wood Gas: Heat Engine: TEG (Thermal Electric Generator): Steam Engine:
Eric Hanson wrote:Is this a theoretical number or an actual recorded rate?
Mark Cunningham wrote: I've read of conversion rates exceeding 60 -> 70%.
Mike Jay wrote:Mark - Thanks for the list of YouTube videos!!! That will keep me busy for quite a while! I'm starting to think wood gas isn't as impossible as I did three hours ago
Eric Hanson wrote:
Regarding the propane generator.
I have a gas generator and I have found that the gas actually lasts longer than some fear it would. Nonetheless, I think that propane is tops for longevity. Given that there are dual fuel generators, do you think/know if you could start you generator on propane and then switch to oldish gas once the generator worms up a bit. I have found that when I use ether to start the generator, even very old gas will run in the generator. I am not suggesting that a person should just let the gas set around for years, but occasionally one does get gasoline and then not use it for some time and it would be a terrible waste to not be able to use it (and really, if it goes bad, what are you going to do with it anyways?).
I would love to know your thoughts on this issue,
pine and poplar have both been used successfully in raw wood gasifiers. Chunks tend to be the norm; chips tend to be a problem on more homemade units. Consistency of fuel can also be a problem with chips. for electricity you want clean consistent gas and that starts with clean consistent dry fuel. The smaller the gasifier the less tolerant of fuel variations it becomes. In your case an imbert design or wayne keiths design would probably be in order. The dobson looks interesting but I have not heard of a successful homebuilt. Lots of complexity there. For charcoal designs you gain ease of construction at the cost of preparing the fuel. I make my charcoal in a wood stove so there is no wasted heat or gasses.
Mike Jay wrote:There's a whole world to come up to speed on. Luckily I have time and about 4 other projects to do first...
On one hand I'd love to build one. On the other hand, I'd be willing to buy a tested design that I know will work. In the brief looking I've done so far, the Dobson Gasifier sounds pretty nifty. I'm not sure if one's been built though...
My fuel source would likely be pine or poplar. An awesome source (if it would work) is wood chips from the city. They wouldn't be dry which I assume would be a problem?
Hey S. Drone, I am using wood chips for the compost heater. Here's my thread on issues with getting it to heat up Getting wood chip compost to heat up
Mike Jay wrote:David B - If 20 lbs of wood = 6-8 kWH, that means I could get 300 kWH from 1000 lbs of wood. That seems pretty reasonable.
From GEK Gasifier:
Relating Gasoline/Diesel to Woodgas to HP to KWe in your vehicle or genset
1 gal of gasoline or diesel will make about 15HP of shaft power for one hour. If driving a genset, this will produce about 10 kWh of electricity.
1 gal of gasoline or diesel is equivalent to about 20lbs of biomass through a gasifier.
1 ton of biomass to power through a gasifier-engine system is equal to about 100 gal of liquid fuel in a genset, or 1 MWh of electricity.
Thus, the main rule of thumb (equivalencies) to remember:
1 kg of biomass ≅ 2 lbs biomass ≅ 2 m3 woodgas ≅ 1 HP-hour ≅ 0.75 kWh electrical