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But is the Bloom box too good to be true? We may not know for years, of course, although early reports from an impressive lineup of beta testers, including Bank of America, Coca-Cola, eBay, FedEx, Google and Wal-Mart, are showing sizable reductions in both energy costs and CO2 emissions. A power generator that saves money and the environment? This must be Tomorrowland!
It appears that the unsubsidized price of the Bloom Box is about $7-8,000/kW, so their 100 kW units cost $700,000-800,000 without subsidy. As a fuel cell, it also needs fuel to run, in this case natural gas or another source of methane (such as landfill gas or biogas from anaerobic digesters).
The unsubsidized cost would be 13-14 cents/kWh, with about 9 cents/kWh from the capital costs of the Bloom box and 5 cents/kWh from natural gas costs, according to Luz Research. If natural gas prices rise or fall 50% (gas prices are often volatile), overall price would fluctuate from 11.5-12.5 cents/kWh to 20.5-21.5 cents/kWh. That unsubsidized price is still too high to compete in most markets with retail electricity without subsidy. However, this is the first generation, and if Bloom can bring prices down (and/or natural gas prices are stable/low), there could be a significant market for this fuel cell.
As far as climate benefits, supposedly it generates electricity at 50-55% conversion efficiency. CO2 emissions when running on natural gas would be just under 0.8 pounds/kWh, which compares favorably to electricity from central station coal-fired plants (2 lbs/kWh) or natural gas plants (roughly 1.3 lbs/kWh) and the national average for on-grid electricity (around 1.3-1.5 lbs/kWh). Clearly, though, the Bloom Box is still not a zero emissions tech and would only cut emissions by roughly 50% relative to the national average, unless it runs on landfill gas or biogas or hydrogen from electrolysis fueled by zero-carbon electricity (which would be much more expensive as you have to add cost of electrolysis unit, higher cost electricity, and about 30% conversion losses in electrolysis).
blogs.forbes.com...
I also hear that it may require zirconium oxide as a membrane (can anyone confirm that?) and zirconium doesn't grow on trees, nor is it processed quickly, which may hamper production volumes.
So is the Bloom Box the solution to all the world's energy problems? Of course not. But could it finally move fuel cells for stationary power generation a big step forward? It looks like the chances are good. Only time, and the tests of the market, will tell...
It's worth noting though that with the idea initially funded through NASA's Mars program and the initial product launch only enabled by public deployment incentives, the Bloom Energy fuel cell is another good example of how public investments in technology R&D and deployment can catalyze significant private sector investment, innovation and entrepreneurship to drive forward a new technology with potential for widespread application as costs come down.
blogs.forbes.com...