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October 1st, 2010 12:53 PM #11
Viable but far from being "free".
Anyway, having a target power output of the powerplant is already enough to compute for the BTUs needed to generate the said amount of power.
Knowing the BTUs needed, you can compute how much fuel (mass of fuel per hour) required to generate the required amount of steam at required the pressure.
Knowing the amount of fuel needed to run the power plant per day, you can compute the required amount of bio-mass to generate the required amount of methane gas since bio-gas is already pretty much a science.
Have you done your math yet? That methane storage tank (assuming storage will be uncompressed) will be very big just to fuel the boilers for a day. And I know you will need a tank big enough to buffer enough fuel to last at least a few days. Is there enough land at the proposed site to build such a methane storage tank without violating safety rules and land use laws?
I don't know about your mechanical engineer (or I am just rusty) but is it not running a powerplant at 25% of max rated capacity might be inefficient even if assuming load increases over time.
A boiler, steam turbine and electric generator good for 0.5 Megawatts. Methane storage facilities, biogas generators and all the skilled and unskilled labor required to run such a facility. And transport for all the bio-mass needed to feed the biogas generators/digesters.
Sounds expensive to setup and run. Far from the "free" you were saying earlier.
And who ends up paying for this? The government again using tax payer's money?
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