12 April 2011

A Closer Look at Rossi's Numbers for his LENR / "Cold Fusion" Device


Both Brian Wang and Brian Westenhaus have been following the progress of the Rossi / Focardi low energy nuclear reaction device.

Rossi claims that the reactor is able to obtain large amounts of heat energy from the low energy nuclear transmutation reactions that transform Nickel into Copper. Here is a more detailed look at the energy numbers involved in such a transmutation:
MeV for each Ni transformation

Starting from Ni58 we can obtain Copper formation and its successive decay in Nickel, producing Ni59, Ni60, and Ni62. The chain stops at Cu63 stable.

For simplicity I assume all the Nickel in the reactor in the form Ni58.

For simplicity I suppose for each Ni58 the whole sequence of events from Ni58 to Cu63 and as a rough estimate I calculate the mass defect between (Ni58 plus 5 nucleons) and the final state Cu63.

Ni58 mass is calculated to be 57.95380± 15 amu

The actual mass of a copper-Cu63 nucleus is 62.91367 amu

Mass of Ni58 plus 5 nucleons is 57.95380+5=62.95380 amu

Mass defect is 62.95380-62.91367=0.04013 amu

1 amu = 931 MeV is used as a standard conversion

0.04013×931 MeV=37.36 MeV

So each transformation of Ni58 into Cu63 releases 37.36MeV of nuclear energy.

Nickel consumption
One hundred grams of nickel powder can power a 10 kW unit for a minimum of six months.

How much of Ni58 should be transformed, in six months of continuous operation, in order to generate 10 kW?

10 kW is thermal or electrical power. The nuclear power must be larger. Assume a nuclear power twice:
20 kW = 20,000 J/s = 1.25 x 10**17 MeV/s.

Each transformation of Ni58 into Cu63 releases 37.36MeV of nuclear energy.

The number of Ni58 transformations should thus be equal to (1.25 x 10**17)/37.36 = 3.346 x 10**15 per second.

Multiplying by the number of seconds in six months (1.55 x 10**7) the total number of transformed Ni58 nuclei is 5.186 x 10**22.

This means 5 grams.

The order of magnitude is not exactly the same but seems to be plausible. This means also 5 grams of Nickel in Rossi’s reactor transmuted into (stable) Copper after six months of continuous operation at the rate of 10 kW. _NextBigFuture

This may seem incredible to most persons who know how many tons of coal are required to provide the same amount of power as 5 grams of nickel. But nuclear energy is on a far different level of scale than chemical energies, such as combustion energy.

But if you consult this table of energy densities provided at Transtronics Wiki, you can clearly see the difference in scale between the energy of nuclear reactions and the energy from chemical reactions -- roughly 7 or 8 orders of magnitude, depending on the method of comparison.

Imagine the savings in fuel transportation costs alone!

Will this sparkling new form of energy prove to be true gold, or just a fool's flash in the pan? Time will tell.

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Blogger Loren said...

How readily available is nickel powder? There were some doubts about this on talk-polywell, mostly due to the documentation of the demo reactor, but it shouldn't be hard to reproduce, even in a garage.

Tuesday, 12 April, 2011  
Blogger kurt9 said...

I reserve judgment on this device until Rossi's factory comes on line and these devices are out in the marketplace. I agree this is game changing if it is real. Basically, all other sources of energy go away.

Wednesday, 13 April, 2011  
Blogger kurt9 said...

From what I know about this reaction, the Ni powder must be nano-structured in order to increase the surface to volume ratio to the maximum extent. The reaction is dependent upon high loading of the hydrogen into the Nickel grains. The smaller the powder-size, the greater the loading and the more reaction you get.

Wednesday, 13 April, 2011  
Blogger Reinstenanoventures said...

I am totally agreed with you Mr. kurt9. reaction is absolutely dependant upon high loading of the hydrogen into the Nickel grains. Reinste provide nickel nanowires. Nanowires

Average diameter: 200-300 nm
Length: up to 200 μm

Available in : 10mg , 100mg , 1g Pack Sizes


Friday, 15 April, 2011  

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