This article is taken up the issue of the exploitation of water as a source of energy and, today we face the issue of the exploitation of wave energy as a source of energy.

THE SWELL

The waves are formed due to the action of the wind, dragging along its direction the surface layer with which it is in contact, and due to the viscosity of the fluid which leads to the transmission of this "drag" of the wind toward the inner layers of the water in examination carrying a "landslide" of the surface.

Another cause of the wave motion is attributed to ocean currents which lead to the mixing of the mass of water due to the gradients of temperature and salinity present in it.

We face a particularly interesting, anticipating this post with the presentation of the technology and fuel cells, in fact it is called a particular solution based on them called BloomEnergy.

It all started in February 2010 when between the media began to spread the news of a "revolution" on energy technologies capable of representing a viable, efficient and clean for the production of energy.

Abandoning ads sensationalist, and in the spirit of this column, let's now see what it really is, even without going into technical exhibitions too complicated.

A solar panel that works at night and 'a contradiction in terms. In a word: impossible. But Steven Novack, Idaho National Laboratory of the U.S. Department of Energy, has developed a new concept of solar panels intended to create a revolution in the industry. And most of all overcome the major limitation of solar panels: no sun, and at night, they do not produce energy, with the obvious limitations that this' implies.

INFRARED - Novack began with an observation of fact: about half 'of the available energy of the solar spectrum at the Earth in the infrared band (Ir). And part of this is re-emitted as heat from the ground during the night. If the night and 'cover, in part, the infrared are reflected back to the ground. That's why 'in the deserts, where the cloud cover and' absent, at night the temperature drops considerably and it's cold: the heat is dispersed through the atmosphere and into space as radiation Ir.

With the term Cogeneration it refers to the practice of producing a combined manner in electrical and thermal energy, with the aim of obtaining a primary energy consumption lower than consumption that would occur with the separate production of the two energies.

Clearly the combined production of energy has meaning where there is a need for both energy supply, and in such contexts, the CHP solution can be a viable solution for energy and cost savings.

The cogeneration plant is obtained by using a heat engine capable of converting the energy released by combustion into mechanical energy (and from this into electrical energy), and to generate heat energy recovery as "waste" in the previous process.

The research laboratories worldwide are studying the first solutions to an emerging problem: some metals used in the renewable energy, are going to become even more rare. Among others, indium, gallium, platinum, tantalum. To raise the issue is a report of the European Union.

By 2030 the demand for items almost impossible to increase by three times. With an impact on some technologies for the use of renewable energy, identified in the study of the EU.

But it is precisely the need to develop alternatives to fuel the research and development of innovative solutions. As the recycling industry and university laboratories in Europe. Otherwise, according to the report, you will need to explore in depth the coast terrestrial to marine drilling now not generally exceed 200 meters below the seabed, and the mine record comes four kilometers from the surface.

Growing use of design tools multiphysics: advanced mathematical and numerical computing technologies now enable a more accurate description of the interaction between the different physical to get more sophisticated products.

The use of tools for the numerical simulation of a physical phenomenon of special interest to the academic and industrial. There are many, in fact, situations where both these worlds have benefited from mathematical and numerical models capable of representing and analyzing the behavior of a physical system through computer processing and the subsequent post-processing of the data obtained. The traditional approach adopted by software companies that have dealt with these issues has always been based on a modeling limited to specific types of physical phenomena. From the thermal analysis structural mechanics, electromagnetism to chemistry, fluid dynamics to acoustics, the various software on the market were, at least until a few years ago, characterized by specialization to a single physical. In recent years this trend has given way to a new vision of simulation that favors a more general analysis of the scientific problem or project, taking into account not only the individual physical phenomena but also the mutual interaction effects.

The use of phase change materials in the building industry is expanding, not only on an experimental basis, but also conventional in construction, for sale. Unlikely are used "loose", but most often are encapsulated in containers or with different technologies, depending on the type of use that the phase change materials are intended to have.

The functions performed by the PCM in the building industry are many and there are many types of products on the market, many times unknown or rarely used.

It's called ETFE and is the plastic polymer that will change the face of modern architecture. From the Olympic Stadium in Beijing at the new headquarters of the Lombardy region.

It is transparent, self-cleaning, recyclable, has a high resistance to very high temperatures. It weighs 99% less than glass. It's called ETFE, ethylene tetrafluoroethylene, and is the material that is going to revolutionize the face of modern architecture. From Beijing to Cornwall, via Milan. It is now for about fifteen years that architects and engineers have begun to replace glass and other traditional materials with thermoplastic polymer in this futuristic and ambitious works in various parts of the world.

INTRODUCTION TO SOLAR THERMODYNAMIC

The guiding principle of this solution is rather simple, and is based on the idea of replacing in a normal thermal power plant steam the steam generator with a solar system capable of producing steam to be sent to the turbine.

The steam turbine for power work needs to steam at appropriate pressure and temperature, and the efficiency of the thermodynamic cycle is a function of these parameters.

A thermal heating consists essentially of four elements:

• Fuel Tank

• One or more heat generators

• Safety devices, control and measurement

• Circuits of use, sorting, and channeling heat radiation