bio cooker

[neil]

Hi i have a cooker that runs on bottle gas (propane)

would there be a problem running it on bio gas.

thanks Neil

[martin]

probably.........I'd guess that you'd have to make the 'oles bigger as biogas is not as "powerful" as the bottled variety
(rather like when there was a nationwide conversion to North Sea Gas - every single appliance had to be altered)

[Ivan]

Yes, Martin's right. Also, biogas has a very slow flame propagation speed, so the flame is easily blown out. Personally, I'd probably add something that will glow redhot in the flame (eg some wire mesh) so that it can relight if it is blown out.

[neil]

thanks for help.

what is best way to use biogas,heard people use it for argas,boilers ect.

would they have the same problem.

thanks neil

[Alan]

The way Bio gas, or any other by product type gas is used for heat generation is to have a base flame Oil or Gas of a fixed percentage.
With auxiliary injection nozzles for the other types of gas.
The other types of gas are only introduced after the base flame has been ignited in the correct sequence.
Feedback from exhaust oxygen / carbon monoxide levels are then used to control the air inlet damper to maintain the correct air fuel ratio for what ever type of gas is injected.
On smaller efflueent plants the gas is burnt with high excess air levels if the exhaust oxygen levels are not monitored.
Because the calorific value / water content on Bio gas is so changeable it is not as straight forward to use it on a small scale. It could be introduced into the air flow of an oil / gas boiler after the normal burner has been ignited in the normal way.

Regards

Alan