With large vehicles conversion losses decrease, and the advantages in distributing power through wires or pipes rather than mechanical elements become more prominent, especially when powering multiple drives e . g . driven wheels or propellers.
12.
I guess the implication is that the absorbed optical energy is converted into heat, which is also a usable energy form, though one that will probably be subject to more conversion loss .-- mattb 04 : 58, 21 April 2007 ( UTC)
13.
The second method is to combine the hydrogen with carbon dioxide and convert the two gases to methane ( see natural gas ) using a methanation reaction such as the Sabatier reaction, or biological methanation resulting in an extra energy conversion loss of 8 %.
14.
This is optimistic, because $ 1 / gal equates to $ 10 / MBTU which is comparable to woodchips at $ 7 / MBTU or cord wood at $ 6 $ 12 / MBTU, and this does not account for conversion losses and plant operating and capital costs which are significant.
15.
The report went on to demonstrate the economic inevitability of continued methane use in hydrogen production due to the cost tripping effect of hydrogen fuel cells on renewable mileage due to conversion losses of electricity to and from hydrogen when compared to the direct use of electricity in an ordinary electric vehicle.
