We discuss and comment on the role agriculture will play in the containment of the CO2 problem and address protocols for terraforming the planet Earth.
A model farm template is imagined as the central methodology. A broad range of timely science news and other topics of interest are commented on.
Wednesday, February 9, 2011
Solar Cutting Torch
You may wonder why I would care
about a solar dish that has been about for thousands of years.The reason is that I am reminded of a
peculiar fact related to this technology.
A smooth parabolic mirror creates
too narrow a power peak and this sharply reduces the thermodynamic efficiency
of the system itself.
By simply pasting 5800 mosaic
like tiles on the surface he has developed a tile sized focus that collects
energy from all 5800 mirrors over that cross section without any special peaks
that destroy uniformity.
Thirty years ago I met with a
developer who had an efficient horizontal parabolic mirror set to capture light
over a two inch wide collector for the exact same reason.
One can see here that if the sun’s
energy is able to provide one degree of gain through each mirror, then 5800 such
mirrors will handily provide 5800 degrees of temperature gain.Most important it is spread uniformly over a
tile sized focus or a bit larger if need be.
The key to this device’s
practical importance is the spreading of the incoming energy onto a tile sized
focus.It really could be used for
The take home lesson is that this
can be fabricated in your garage from a molded parabolic shape using fiber glass
or even plaster. (just use a satellite dish as your initial mold) and a lot of
mirrored tiles that are small and a lot of cheap glue.One would just work in from the outer edge
and not worry too much about the center where you may want a hole to send the
working beam back.
There is plenty of need in the
developing world in particular for a metal cutting tool that is cheap.This certainly does the job.
Look what I made, mum! Teenager builds 'death-ray' which can burn
through almost anything