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I need help with my digester project ?
hello i have attached a drawing of a project i am thinking about , but like ususla have some questions i need help with.
1. you see on the drawing i have included a storage tank. Do you think it will work laid out like this?
2. How can i compress the methane enough to runa smal generator?
3.What would be the size of teh safety gas valve i should purchase. I have no idea of how much pressure a smll 8 to 12 hp generator takes to run .
Any help anyone can give woudl be greatly appreciated.
thanks,
andy
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Best Answer 10 years ago
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10 years ago
. Methane vapor has a fairly low energy density (not as many Btu/volume as gasoline, diesel, or LPG) so you may not be able to effectively convert a gasoline/diesel engine to use low-pressure methane. All the conversion kits I've seen use LPG. You might be be better off finding an engine designed to run on methane/natural gas. But I'm no expert.
10 years ago
Your engine should draw as much methane as it needs so no pressurising is required.
a bigger problem may be converting the engine to run from a gas rather than a liquid fuel.
This in mind the blow off valve only needs to be a low pressure HOWEVER all the simple DIY digester plans I have seen don't have one at all.
have you fully researched this project?
I am not an expert in this field - you take my comments at your own risk.
Answer 10 years ago
I have only did a little research on this at this point. I have never seen a pressure regulator either on a digester, but i am traditionally overkill on safety with everything i do.
my thoughts on the generator was that i woudl start with a propane fueled and reseacrh to find what adjustmenst have to made.
This is all in the baby stages. I have only filled up balloons in the past with methane andhad a little torch burning . Never attempted a engine. I figured they has to bea formula somewhere on size of digester for size of engine.
thanks for the response.