Metamaterial thesis

February 23,Elhuyar Fundazioa Illustration of waves propagating away from a point-like source. Wave propagation on a hyperbolic metasurface.

Metamaterial thesis

Heliostats have a potential of being the truly lowest cost solution to all the power one needs. These systems can provide for domestic heating, electricity, and lighting. The realization that all flat plate solar collectors have lots of expensive collector area and still deliver only low grade temperatures compelled me to look for a better solution.

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Flat plate collectors also need a layer of insulation on the back side. Flat plate collectors usually are not optimally oriented to the sun. Lets see; can I think of a system that uses lots of cheap mirrors and a small expensive collector? Each mirror is initially adjusted so they each reflects light onto the same spot.

When the sun moves in any direction all mirrors are adjusted by exactly the same amount to track the sun and they still reflect light onto the same spot. This is mathematically exact and works anywhere in the world when reflecting on any spot.

This also works with any arbitrary arrangement of mirrors. I have been thinking about these concepts since The germ of the idea occurred during one of the energy crisis.

I was thinking about tracking thermal collectors then the "AHA! The thought that mirrors are much cheaper than flat plate collectors was very powerful.

The secondary thought the actual collector can be stationary and on the ground was a plus. Heliostats are mirrors that track the sun and reflect the sunlight onto a central receiving point.

Most heliostat solar power systems consist of arrays of heliostats. If the mirrors are inexpensive enough then they can collect solar power at a cost that is less expensive and with higher efficiency than flat plate collectors. If used to generate electricity the cost of the precious solar cells are only a fraction of the cost of cells in flat plate systems.

As of I have abandoned the idea of using PV cells in concentrator heliostat applications. Each of these elements is an individual heliostat. When directed to a common collection point there will be a concentration proportional to the number of elements used. With this much concentration factor the relative thermal collection efficiency is about double that of a tracking flat plate collector.

If compared to stationary flat plate collectors the relative collection efficiency may be about 4 times better.

Metamaterial thesis

I have coined a term, I think? This is the temperature a system will attain with no power extracted from the system. The plane of the collector is normal to the sun at noon on January 8th.heliostat How Heliostats Work. Heliostats are mirrors that track the sun and reflect the sunlight onto a central receiving point.

Most heliostat solar power systems consist of arrays of heliostats. acoustic metamaterial and the motivations of this dissertation, the other three chapters organized as following: The second chapter describes the approach to build an acoustic metamaterial based on the transmission line model. The basic concept and derivation of lumped acoustic circuit is introduced.

Terahertz Technology Articles and Papers. TeraView's strong commitment to fundamental and applied THz research and development combined with its drive to understand and interpret terahertz data is represented in continuous publications in international journals.

In futures studies and the history of technology, accelerating change is a perceived increase in the rate of technological change throughout history, which may suggest faster and more profound change in the future and may or may not be accompanied by equally profound social and cultural change.

Beam-powered propulsion, also known as directed energy propulsion, is a class of aircraft or spacecraft propulsion that uses energy beamed to the spacecraft from a remote power plant to provide energy. The beam is typically either a microwave or a laser beam and it is either pulsed or continuous.

A continuous beam lends itself to thermal rockets, . One of the biggest challenges in developing integrated photonic circuits—which use light rather than electrons to transport information—is to control the momentum of light.

Metamaterial thesis
Beam-powered propulsion - Wikipedia