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View Diary: Alternative Energy Round-Up #4 (20 comments)

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  •  It's tough to beat liquid fuels for transportatio (2+ / 0-)
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    RunawayRose, RosyFinch

    there's little else that matches their energy density, especially that of hydrocarbon fuels. Plus there's well established technology and infrastructure in place.

    And there's the common attitude that "I want a car that can go 500 miles on a fillup, not some wimpy electric toy"  There's a number of times that I've seen some commenter here on DKos or some other progress and/or 'green' orientated site state that they can't buy and electric until it can do X hundred miles without recharging. When pressed for details they need that mileage for a handful of trips a year, in some cases only once a year. The rest of the time their daily travel is well within the distance BEVs can handle right now. But those small number of trips is the deal breaker, even though a BEV would save them so much money during the year that they could afford to rent a luxury car for those long trips.

    Geothermal is good, but every time a geothermal booster points to some study on the potential of geothermal, that report gives numbers that show that geothermal can potentially produce no more than 10% of the electric power demand of the U.S., more often around 5%. In terms of total energy demand of the country it's even less significant, because transportation and heating are demands on the same order of magnitude as electricity generation.

    A potential worrisome aspect of geothermal is that many of the rosy projections of potential depend on hot dry rock sources, and those generally use fracking to open them up - the same process (fracking) used by oil extractors to get more oil from wells and which seems to cause a lot of environmental problems.

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