Posted by Neo on March 6, 2010, 4:49 pm
> > Apparently the maintainance on the BloomBoxs is negligible in the short
> > Term,
> Based on what?
> >when compared with ANY mechanical Power Generation Systems, both
> > short and long Term. I would expect that the BloomBox efficiency is
> > likely somewhat better in Total BTU's IN to Total Power Generated OUT,
> > due to that any mechanical Power Generation System System is less than
> > 40%, in total BTU Effecentcy.
> Most fuel cells have high efficiency compared to mechanical devices, but the
> question here is the efficiency of the Bloom fuel cell plus its associated fuel
> reformer.
> > We are still waiting for Official Data on these issues...
> Exactly
> Vaughn
Thanks you for your response.
So theoretically, the Bloom fuel cell should have an energy efficiency
advantage over those residential size NG emergency generators like
the ones I saw in Michigan several years ago - if it is coupled with
an energy efficient fuel system.
Slightly off topic (because this question is for commerical
and not a home application) --- Should a Bloom-cell-based
generator be theoretically signficantly more energy-efficient
than an equivalently powered industrial size mechanical
turbines burning methane gas (e.g. the kind that a
landfill would use to generate electricity commerically)?
Posted by Robert Copcutt on March 15, 2010, 10:47 pm
Neo wrote:
>
> Slightly off topic (because this question is for commerical
> and not a home application) --- Should a Bloom-cell-based
> generator be theoretically signficantly more energy-efficient
> than an equivalently powered industrial size mechanical
> turbines burning methane gas (e.g. the kind that a
> landfill would use to generate electricity commerically)?
>
>
A well engineered SOFC (like the Bloom cell) will get nearly 50%
efficiency at full power which is similar to a combined cycle gas
turbine. However, the SOFC will see much greater efficiencies at low
load. Also, you can add a turbine to run off the waste heat from the
SOFC and get full load efficiencies, for the combination, of about 70%.
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> > Term,
> Based on what?
> >when compared with ANY mechanical Power Generation Systems, both
> > short and long Term. I would expect that the BloomBox efficiency is
> > likely somewhat better in Total BTU's IN to Total Power Generated OUT,
> > due to that any mechanical Power Generation System System is less than
> > 40%, in total BTU Effecentcy.
> Most fuel cells have high efficiency compared to mechanical devices, but the
> question here is the efficiency of the Bloom fuel cell plus its associated fuel
> reformer.
> > We are still waiting for Official Data on these issues...
> Exactly
> Vaughn