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Of course if you really are talking actual efficiency than co-generation engines https://en.wikipedia.org/wiki/... are the way to go. The most logical version in the low density domestic situation, a sewerage digester https://en.wikipedia.org/wiki/..., basically a large tank where you kitchen and toilet waste initially go, to start breaking down prior to going to sewer, specifically to produce methane, which you then burn in a gas turbine engine generator http://newenergyandfuel.com/ht.... Not quite the best design because you want to use the exhaust gases to heat water or your house and the radiate heat from the unit in say a clothes drying room and of course the electricity to go to your house battery (better balancing of energy needs between needing heat and electricity, of course if you have a heated pool, you can see real advantage in a domestic methane co-generation plant). You could use the energy to power bullshit crypto generation but in reality it would probably be smarter to sell the electricity you generate from mud monkey poo (earth primate faeces) back to the grid. How much electricity, how big is your family (a subtle dig at Americans there) and how big is your methane generation tank, and if you cogeneration plant is sized accordingly, will drive how much money you save or make, depending upon electricity and hot water usage.

In fact those kind of installations should already be mass produced for default installation but mud monkeys are such a backward short sighted species often not able to see much beyond their own genitals (methane is ten times worse than carbon dioxide but who cares, I don't own any underwaterfront property, I wonder if they will develop house snorkels first, surf zone, probably not).

Time to move on towards what works, and is not so expensive: Sandia's Z-machine: https://share.sandia.gov/news/resources/news_releases/nuclear_fusion/ http://www.wired.com/wiredscience/2012/09/fusion-energy-breaking-even/ http://newenergyandfuel.com/http:/newenergyandfuel/com/2012/09/18/sandia-lab-releases-info-on-a-new-type-of-fusion-device/

...Like a diesel generator? 50% thermal efficiency instead of petrol/gasoline's 30%. And longer engine lifespan as a bonus.

It's not as simple as that.

"In total efficiency turbos win. For thermal efficiency a diesel would win, but add in the mechanical efficiency and the turbo wins. Internal combustion with pistons, rods, cranks, and the valve gear generate lots of friction and resistance. And turbines weigh much less allowing for more battery or capacitor capacity."

http://newenergyandfuel.com/http:/newenergyandfuel/com/2010/08/05/micro-turbines-headed-for-hybrid-trucks/

Plus of course those nasty oxides of nitrogen (since the combustion is happening in air) that turn into nitric acid when you breath them in to moist lungs. You don't get much of them but a wild absolute claim like that (emissions are only water) shows that you have either been very badly conned by PR or are deliberately attempting to fool others that you assume are either very poorly informed or of low intelligence.

Talk about low intelligence! Your claim took about fifteen seconds to dismiss from that evil PR tainted source, the U.S. Department of Energy on Hydrogen Vehicles...

You see, with a lot more than a high-school education and some practical experience with real life mechanical things, you will learn that even hydrogen cars can use emission scrubbers to get rid of trace nitrogen oxides... emissions are what comes OUT OF THE CAR. Which you will learn when you get one and have to have them tested.

That's not likely. Storage is still a problem and the WWII gas powered vehicle solution of a great big balloon on top of the vehicle to get extra storage capacity doesn't work very well with hydrogen

Well it's nice that your history class went well. But in the meantime lots of research has been going into alternative ways to store hydrogen.

You know, the thing about stupidity is that it's really a choice. It starts with ignorance, the thing that makes someone stupid is when they refuse to learn from new data. So are you an idiot or just ignorant? It is time for you to decide, a choice only you can make.

I will let you have the last reply, if you so wish - an ignorant man would learn from error and leave things lie, while the idiot always digs the hole deeper.

I know the shovel at your feet now tempts you mightily - but I urge you to put it down.

Hey! North Korea has achieved cold fusion! Slashdot reported it here. A couple of italians also achieved cold fusion a few days ago. Why are you so skeptic?

Btw, in accordance to Poe's law, here's your smiley: :P

There are recent studies showing it may be possible that some of our methane on Earth is being created by the high pressure/temp conditions in the earth's mantle, rather than exclusively by the decay of organic matter. A written article on this, or an NPR segment (about 1/3 of the way into the audio file).

Your children will bask in a society powered by cheap solar electricity that you are funding right now, just as you benefit from the electrical power infrastructure built by your parents.

We'll see. Orbital solar can get 20x the power of land based. Needlessly cluttering up our landscape with hundreds of thousands of square miles of ugly solar panels is ridiculous.

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There are just a slew of "buts" coming. First off is as Holmlid notes, just making the deuterium so dense in any volume is an issue and must be worked quite cold. Next, the matter of stability comes to mind, as in the paper’s graphs the time to live is short, shorter than even nanoseconds. That makes the foreseeable production essentially within a laser fusion reactor. Making the ultra dense deuterium and moving it seems out of the question for now. The time of life seems impractical for any laser ignition anytime soon. Finally, the fusion reaction would have to be rather, well, counter intuitive, yielding harmless helium and hydrogen. One would expect a wider range of new materials from the fusion including tritium, which can be nasty radioactive stuff. Lots of supposition, but experimentation is in order.

All that said, it is by every objective view - a great success. Metallic hydrogen has been worked on for several years with less than useful results. The heavier ultra dense deuterium with the atoms already very close might just spark some engineering to see if the new fuel candidate has potential. But it’s a long climb up a tall mountain.