biomass chunker

[Marko]

that looks just the ticket do you get any mould growth in the bottom?i was thinking using the ibc cage with a 1 cube vented bag inside but getting the stuff back out would be a pita me thinks

 

They are fully dried before going into the IBC. They definitely mould if put in unseasoned (tried it earlier this year). I doubt a 1 cube bag would work either unless you were forcing air through it.

[Alycidon]

[

I would love to know how well this stuff would burn on a log burner? Regular feeding wouldn't be too much of an issue as I both me and the mrs still fight over who gets to play with it next...

 

 

 

I bought 40 tons of Oak joinery waste this summer, I looked at chunking it but it the end put it through my Japa 700, that was a dreadfully slow operation.

 

Test burnt some one wet day in May, temperatures generated were up to 650F, normally I get about 425F on hard and up to 500f on soft.

 

Lots of space round it meant it burnt to the point were stove damage may be an issue. Am now recommending the use of a stove thermostat when burning it. Chunked stuff with the bark on will take a good while to dry properly as its not split, around 4 years I would estimate for an 8 inch long chunk as the moisture can only escape from the ends of the chunks. Therefore I would expect temp outputs to be much lower until dry, then stand well back.

 

A

[forestgough]

MARKO

When you say rhi of £3-4 a bag do you mean the bags in the picture?

To answer the question about using the chunks in a log burner,we use them and find them good and hot.I am determined to heat my room without using any conventional firewood.

Productivity is about 1 cube every 15 minutes when two men are chunking into vented mesh bulk bags.

I feel bulk handling is the way if you have the set up.

[Marko]

Yes - in as much as the bag sizes in the picture; the ones burnt to date were predominantly a mix of cherry and willow rather than the hawthorne in the picture. The bag weights when seasoned vary quite a bit so I am sure that a far bigger sample is needed to get more certainty on the average RHI value per bag. It is early days with the meter and we may well have not got it right - I suppose the proof of the pudding will be when the first cheque lands.

[Breezeblock]

Yes - in as much as the bag sizes in the picture; the ones burnt to date were predominantly a mix of cherry and willow rather than the hawthorne in the picture. The bag weights when seasoned vary quite a bit so I am sure that a far bigger sample is needed to get more certainty on the average RHI value per bag. It is early days with the meter and we may well have not got it right - I suppose the proof of the pudding will be when the first cheque lands.

 

are you getting rhi for burning them or are you reselling the bags

[ballibeg]

Thought rhi need certified sustainably sourced wood now.....our at least soon.

[Breezeblock]

Thought rhi need certified sustainably sourced wood now.....our at least soon.

 

not for domestic for commercial it is i believe

[Aicchalmers]

for generator fuel ?

 

I was thinking a small tractor with a nice perkins etc diesel on it with a ****** fuel system but otherwise all good, requires conversion to run on spark ignition with high compression ratio and the most fiddly bit is the controls for your 'carburetor'. But all together not too implausible and plenty of open source designs out there. see GEK -

About Us - GEK Gasifier

GEK Wiki / Summary of Genset Options for Wood Gas

 

Have a bulletproof PTO generator and biomass chunker and a few acres of medium rotation coppice and you're pretty set up for when the oil runs out ..

[Marko]

Thought rhi need certified sustainably sourced wood now.....our at least soon.

It does and it is. Not a difficult process at all to get certification - it is very straightforward if you meet the criteria.

 

To me it seems preferable to burn chunks and sell the logs that would have otherwise have been used.

[difflock]

I was thinking a small tractor with a nice perkins etc diesel on it with a ****** fuel system but otherwise all good, requires conversion to run on spark ignition with high compression ratio and the most fiddly bit is the controls for your 'carburetor'. But all together not too implausible and plenty of open source designs out there. see GEK -

About Us - GEK Gasifier

GEK Wiki / Summary of Genset Options for Wood Gas

 

Have a bulletproof PTO generator and biomass chunker and a few acres of medium rotation coppice and you're pretty set up for when the oil runs out ..

 

Surely better to make biodiesel?, for a diesel engine.

Or for a stationary application simply rig a insulated fuel tank with a heater and run on Straight vegetable oil.