by EnergyUnlimited » Tue 10 Aug 2010, 13:28:59
$this->bbcode_second_pass_quote('diemos', '
')I'm quite familiar with the NIF project and I'm very confident that they will achieve their goals to reach ignition. But I know enough to know that they define ignition as more fusion energy produced than laser energy input. That's nice, but if you want to create a power plant you need to get more electricity out than electricity in to run the plant. Given that the best research lasers have an efficiency of converting electricity to laser light of 10% and a good power plant can convert heat to electricity with an efficiency of 30% you need to get to 30:1 fusion output to laser input just to build a power plant with eroie of 1. Much less one that actually produces a useful excess of energy.
I have never taken part in large NIF like projects, however it is quite obvious for me that achieving parity between input and output of energy is a very far cry from a viable fusion reactor.
Even it they produced enough energy to make such project self powering (and it is substantially more than they are now trying to achieve), it would still be a very far cry from commercial fusion.
After all whats the point to spend $ billions assemble giant laser installations, just to deliver 20-50 MW of electricity output?
Personally I suspect that this is what we might get at the end as long as fusion power is concerned:
Working proof of concept but hopelessly expensive to allow for large scale commercial applications.
In respect of scientists making overoptimistic claims:
At one point I was taking a part in joined research project where my employer from pharma, UK government and prestigious UK academic institution was involved.
There was an explicit pressure on researchers involved (including myself) to make some well sounding, far reaching statements while presenting progress of work, or otherwise some grants might be withhold.
So such a statements were made on number of conferences but we were perfectly aware that these optimistic claims are not entirely impossible to achieve but realistically we knew that delivering of only small fraction of trumpeted total would still become to be quite an achievement.
Eventually that was the course of events, all researchers involved were happy, I got a good bonus myself and funding government body was also satisfied with results produced.
Overoptimistic part was quietly forgotten (as it was known from the beginning that odds of "grand success" are marginally slim).