at the edge
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Are there any merits in a new build at the minute or do they need subsidy to be viable ?
You would have to feed waste, utilise a big proportion of the CHP heat to good effect and utilise the electricity on site for best value. Even then it would probably be marginal.Are there any merits in a new build at the minute or do they need subsidy to be viable ?
I almost thought as much before I clicked post, but you don’t know if you don’t ask!You would have to feed waste, utilise a big proportion of the CHP heat to good effect and utilise the electricity on site for best value. Even then it would probably be marginal.
If I was in the position I was 15 years ago, before we put our digester in, I would probably go for a home-brew system based on a second hand milk silo, feed it slurry and top of silage clamp waste, and run a biogas boiler for our heat. With more cows I would run a small CHP if one could be found for a sensible price.I almost thought as much before I clicked post, but you don’t know if you don’t ask!
We looked at biogas to biomethane upgrading for tractor use, about 6 years ago. It was cost effective against white diesel, but not against red.Very much depends on what you want the end goal to be..
a 0.5MW based on the business model of renting ground for forage crops funded by an investment company at a ridiculous APR%.. you would seriously be better to do a 9-5 shift standing at your local bookies. If you picked this model there will currently be a queue of investment companies looking to sign you up as there is only one winner in this situation.
Thinking outside the box with waste feedstocks, fully utilizing the gas/heat/electricity is the only way for any sort of long term viability. There is a future in cleaning gas for vehicle usage or by use in other standalone engine's, I do think in the near future that many more large factories/schools/hospitals etc will have their own CHP's on-site that will need to be fueled by importing cleaned gas but whether the return will ever match the substantial set up costs is still somewhat uncertain.
I think more will look at this as white will have to be the fuel of choice for any AD activities.We looked at biogas to biomethane upgrading for tractor use, about 6 years ago. It was cost effective against white diesel, but not against red.
If I was in the position I was 15 years ago, before we put our digester in, I would probably go for a home-brew system based on a second hand milk silo, feed it slurry and top of silage clamp waste, and run a biogas boiler for our heat. With more cows I would run a small CHP if one could be found for a sensible price.
I wonder when it will be viable to put in a hydroelectric generator, of course the rules of the environment agency (or the Welsh equivalent) will probably put a stop to this.Very interesting. At what size (amount of feedstock) would you see this viable for domestic house to have its heating run? How clean does the gas have to be to run such a boiler?
Cattle slurry from around 50 cows should run a boiler without issues for a house, and keep itself warm. That is a bit of a guess, Michael Chesshire has more experience with small digesters - see the Food Waste section in his website https://lutra.eu/#consultancy, the other person with experience I know is Angie Bywater https://www.southampton.ac.uk/engineering/about/staff/amb1a13.pageVery interesting. At what size (amount of feedstock) would you see this viable for domestic house to have its heating run? How clean does the gas have to be to run such a boiler?
Surprising what a 700w 24/7 with battery bank will power and small enough to run in stealth mode.I wonder when it will be viable to put in a hydroelectric generator, of course the rules of the environment agency (or the Welsh equivalent) will probably put a stop to this.
I would like to see every small stream having its own micro generation scheme, I think that would be so good for alleviating fossil fuel use.
Cattle slurry from around 50 cows should run a boiler without issues for a house, and keep itself warm. That is a bit of a guess, Michael Chesshire has more experience with small digesters - see the Food Waste section in his website https://lutra.eu/#consultancy, the other person with experience I know is Angie Bywater https://www.southampton.ac.uk/engineering/about/staff/amb1a13.page
The boiler we have is a very simple natural draft cast iron heat exchanger type, which is pretty indifferent to gas quality. I would suspect something like a modern combi or condensing boiler would have a more delicate heat exchanger.
Do check out. By the time I was ready to seriously enquire about the system in the video the Co had seemed to have gone bust according to Co House.Thanks for that. I see Michael Chessire is the same chap in the video which RenewableJohn posted.
I will check the links out, thank you.
We are in a similar situation in that we have waste from feed troughs, top of silo + several hundred housed sheep and 60 cattle. Just exploring possibilities for a small digester; perhaps a heated greenhouse or domestic heating.