Category Archives: Solar Energy

26Nov/15
Transform the sun's energy

Transform the sun’s energy

Transform the sun's energy

The solar energy can be used in two different ways. As once did Romans Greeks and all the classic peoples who worshiped you can use the heat energy that gives us, so, with solar collectors of different types, heaters and concentrators can heat water, but not at very high temperatures, they can not overcome the 4000 ° k so that solar energy will not be useful when melting metals in blast furnaces etc. .

But some things can be achieved, depending on the ingenuity of the designer and the technological possibilities: To collect the heat energy from the sun several devices are used for flat plate collectors: flat plate collectors intercept solar radiation on an absorber plate by passing the so-called carrier fluid.

(This, in liquid or gaseous state, is heated passing through the channels by heat transfer from the absorber plate).

The energy transferred by the carrier fluid, divided by the solar energy incident on the collector and expressed as a percentage, is called instantaneous collector efficiency. The flat plate collectors generally have one or more transparent plates to help minimize heat loss from the absorber plate in an effort to maximize efficiency coverts. They are capable of heating carrier fluids up to 82 ° C and get between 40 and 80% efficiency.

The flat plate collectors have been used effectively to heat water and for heating. Typical systems used for home-room fixed collectors mounted on the roof. In the northern hemisphere they are oriented towards the south and south to the northern hemisphere.

The optimum angle of inclination to mount the collectors depends on the latitude. In general, for systems used throughout the year, such as producing hot water, collectors are tilted (the horizontal plane) equal to 15 ° latitude angle latitude and 20º S and 20º latitude orient N, using so more solar energy.

In addition to the flat plate collectors, typical hot water systems and heating consist of circulation pumps, temperature sensors, automatic controllers to activate the pump and a storage device.

The fluid may be both air and liquid (water or water mixed with antifreeze), while bedrock or an insulated tank serve as storage of energy.

Concentrating solar collector energy:

For applications such as air conditioning and central generation of energy and heat to cover large industrial needs, flat plate collectors do not provide fluids with temperatures high enough to be effective. They can be used in a first stage, and then the fluid is treated with conventional heating means. Alternatively, collectors can use more complex and costly concentration.

They are devices that reflect and concentrate solar energy incident on a small receiving area. As a result of this concentration, the intensity of the solar energy increases and temperatures receptor (called “target”) can approach several hundred or even thousands of degrees Celsius.

Concentrators must move to follow the sun if they are to act effectively; the devices used for this are called heliostats, mirrors that are mechanically moving or computerized control to reflect the maximum amount of solar radiation at the target.

Solar ovens:

Ovens solar energy are an important application of high temperature concentrators. The biggest, located in Odeillo, on the French side of the Pyrenees, has 9,600 reflectors with a total area of about 1,900 m2 to produce temperatures up to 4,000 ° C.

These furnaces are ideal for research that requires high temperatures in pollutant-free environments, for example in materials-research.

Central receivers of solar energy:

Centralized electricity generation from solar energy is developing. The concept of central receiver power tower or a matrix of reflectors mounted on computer-controlled heliostats reflect and concentrate the sun’s rays on a water boiler situated on the tower. The steam generated may be used in conventional cycle power plants to generate electricity.

The houses of the future:

Often speaks of smart homes, houses built and specially designed to reduce household energy consumption by focusing especially on energy saving and heat loss. These smart homes, for example have large windows facing south to heat inside in winter and some blinds designed to generate inside a refrigerated space in summer, without spending all electric or fossil energy for heating or cooling.

Also the walls are constructed from ceramic materials that keep heat in winter and in summer expel addition to using concrete tanks or water tanks to keep the heat for the winter night.

These small changes in our lifestyle as smart homes or use double glazing, insulate the house to avoid losses etc. to avoid the risk of passing as in photography; will make in the future global energy consumption is reduced considerably and so, like a domino effect, can save nature and our quality of life much better.

Black bodies:

As described in the introduction, and in relation to the previous point, there is theoretically what are called black bodies (bodies would be able to absorb all the radiation incidiesen upon him), that if someday encontrasen would be a invaluable as devices such as flat plate collectors and solar cells would yield very close to 100% and the scientists only have to worry about how to avoid heat loss and electric resistance and the like; the energy crisis would be solved, with solar energy solution.

19Nov/15
Installation Technician Solar Energy

Installation Technician Solar Energy

Installation Technician Solar Energy

Companies in the sector are not qualified personnel by increased demand has led to the reform of the Technical Building Code. The standard requires that new residential buildings have a percentage of renewable energy, which will double in the medium term the current templates of solar technicians, according to various experts consulted.

Step Belen Jimenez, partner and manager Novasol, acknowledges that installation technicians needed two more solar power, by increasing the workload, but so far have had to make do with one. “No skilled labor. Soon we’ll have to get another, but struggling to find staff.”

Salaries for technical installers of solar installers are around 1,200 euros, although the shortage of specialists may raise this amount when the need is pressing. Something that, according to Jimenez, will occur later this year, as many construction projects currently under construction are still subject to the old rules.

Technical solar energy Novasol responsible shows that there has been a sharp increase in requests from individuals, therefore the increased awareness of Malaga as the increase of information. “This year demand has grown much.

The Technical Code brings major projects for the future, when the houses are already built, but people who are not required is increasingly aware and ask individual installations. ”

In Malaga they operate a hundred medium-sized companies, with an average of six installation technicians in solar energy, and an estimated fifty other make compatible these works and plumbing work as freelancers. In all, some 1,000 professionals, according to industry sources, which can expect double that number to meet the demand of new housing blocks.

In the province, close to the first level of solar radiation, the standard requires that 70% of the hot water will have to come from renewable sources.

Avalanche of requests

Ramon Alvarez is an engineer in Malaga Immosolar delegation of a German company specializing in large installations, responsible for projects such as the provision of hot water at the Kempinski Hotel in Estepona. This expert agrees good medium-term prospects.

“The buildings are older now make projects to 28 September 2006. I believe that the new projects submitted to Industry thereafter will run to the middle of this year and early next. In 2006 there was a spate of projects to avoid the rule. ”

In his view, companies require a lot of manpower, so has generated a great demand for staff, and makes other professionals from fields such as plumbing, entering this sector. At the same time, it ensures that they are creating many specialized entities. “The solar energy works with simple, accessible to small business teams.”

This expert highlights another possibility of development, such as the self-employed. “The entities increasingly opt to have a base template and workers who have recourse to large point projects, peak demand.”

The boom in renewable energy has led many professionals back to school, looking for a field with great potential for business. Alvarez is also a professor at the Institute Autesel in the PTA, where almost a hundred technical future are formed. “There are many training requirements. A year ago only I had a six people. Now, there are six classes of 15 students. ”

The Junta de Andalucía and the Municipality of the capital, through the IMFE, and sponsor specific training courses free. Between 150 and 360 hours according to whether it is general or specific-theoretical teachings and practices enable to design and assemble hot water by solar energy. “Some courses have waiting lists Board of more than 50 people. There is a tremendous demand for training.

The idea is to train students of business first and then create your own business. “But if you opt for a private program, prices reached 2,000 euros. In return, many offer practical and even a commitment to hire. “Companies are already looking to their workers among the students.”

The head of human resources Autesel, Laura Girl, confirms the growing interest of business to integrate students into the workforce. “They ask students to do internships, but usually after the first month of the contract.”

Girl says that given the lack of work experience of new operators, the courses have become a guarantee of their professional training. “At first they are asking experienced workers, but have seen that it was impossible.”

In his view, one of the most popular outlets is part of the Malaga multinational manufacturing of solar panels, Isofoton, based in the PTA. With the growth of the sector, confident girl from May a massive demand for labor occurs, the full implementation of the regulation, and hopes that the Board extend the quotas of subsidized courses spaces.

The environment is no longer a matter of fighting for a few, and has already become a booming economic sector. In the heat of the sun many citizens are finding a new opportunity to make a living.

15Nov/15
What is Solar Energy

What is Solar Energy?

In our solar system, the largest producer of energy that exists is the sun. The amount of solar energy reaching as radiation our planet, equivalent to about 35 million times! energy producing all the power plants in Chile.

Solar radiation, of course, provides us with light and heat energy.

It can also be transformed into electrical energy. In addition, radiation is essential for the plants (through photosynthesis) to gain energy and live. Plants are the basis of the food chain on Earth (also in the oceans, of course), providing energy to the whole animal kingdom.
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11Nov/15
4 questions and answers about Solar Energy

4 questions and answers about Solar Energy

Solar energy is the main source of life on Earth : directs the biophysical and geophysical cycles and chemicals that sustain life on the planet, the cycles of oxygen, water, carbon and climate.

The Sun provides us food through photosynthesis, and as the sun’s energy that induces the movement of wind and water and plant growth.

The energy sun is the source of most renewable energy sources, both wind energy, hydropower, biomass, and the waves and currents, as solar energy itself. Solar energy can take advantage passively (passive solar energy), without the use of any device or intermediate system, by appropriate sitting, design and orientation of buildings, using the physicochemical properties of materials and architectural elements correctly the same: insulation, types of roofs, protections, etc.
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07Nov/15
Types of solar collectors

Types of solar collectors

Solar thermal collectors are devices capable of capturing solar radiation and transmit it to a fluid, for later use.

The solar collectors are divided into two groups:

Solar Collectors without concentration: And they do not exceed 70 ° C, so they are used in the applications of solar energy of low temperature heat. An application example would be the production of hot water.

Concentrating Solar Collectors: Which, using the methods of concentrating optics, are able to raise the temperature of fluid above 70 ° C. These are applied in solar thermal medium and high temperature. We can find examples of these in the thermal solar plant in Almeria (Spain), Grenoble (France) and in California.
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04Nov/15
Harnessing Solar Energy

Harnessing Solar Energy

As we all know, at this point, what are the consequences of using fossil fuels like oil. A thousand times we have heard, the greenhouse effect caused by excessive carbon dioxide in the atmosphere that causes the worrying global warming and the eventual melting of the poles, acid rain falling in nearby industrial zones fields, destroying , soil, fauna and flora of our planet.

Also the smog, the fog covering the big cities caused by the combination of flue gas emissions, with some other natural phenomena, such as temperature inversions, humidity and solar radiation, is one of the terrible consequences of using hydrocarbons.
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26Aug/15
With the sunroof, Google wants to help pass solar energy

With the sunroof, Google wants to help pass solar energy

With the sunroof, Google wants to help pass solar energy

Google has a project in service and for the moment has the name Sunroof, intended to determine whether the roof of a building should be to install solar panels. Thanks to Google Earth, you can evaluate the energy potential of a roof considering exposure and estimate the potential savings.

China is the second largest polluter, like the United States who want to engage in an ambitious plan to reduce emissions of CO2 in order to combat global warming. With the Paris Conference on climate, COP 21, President Barack Obama just made his last fight before the end of his term expiring next year.

“There is no challenge that poses a greater threat to the future and for future generations that change climate, “he said, announcing a program that aims to reduce emissions from US power plants in 2030. The 32 percent energy renewables are at the heart of this plan, particularly solar and wind energy.

If the action is clearly laudable, it also represents a considerable economic attractiveness. The market for solar energy is expanding, and new players are interested in this.

Thus, the car manufacturer Tesla has unveiled its new model you sl to powerwall, a domestic battery that can store electricity provided by solar panels or AC power.

Like other giants of the high-tech, Google is also very sensitive to environmental issues and renewable energy. The Californian firm has launched a new project called S unroof surely foreshadows the great ambitions for the future.

21Aug/15
The first homes in the UK that generates more energy than it consumes

The first homes in the UK that generates more energy than it consumes

The first homes in the UK that generates more energy than it consumes

The Solcer House in Cenin, Wales, was created as part of the Low Carbon Research Institute program. For every 100 pounds spent on electricity, this house will be able to generate 175 pounds in electricity “exports”.

L to first low-cost housing known as a house of ‘positive energy’, which can generate more electricity than its occupants may use, opened last Thursday in the UK.

The modest three-bedroom house built in just 16 weeks in an industrial neighborhood on the outskirts of Bridgend in Wales, costing 125,000 pounds and according to the designers of the University of Cardiff, will allow passengers to use the sun to pay the rent.

When using batteries to store electricity generated from solar panels placed on the roof and because of the thermal insulation, you may be able to export electricity to the national grid for eight months a year.

So for every 100 pounds spent on electricity, should generate export 175 there of according to Professor Phil Jones, whose team of Welsh School of Architecture project Solcer says specifically designed the house to reach the objectives the government proposed in 2006.

I also wanted to show that a house was perfectly feasible to reach the standard for affordable prices with current technology. So you pass the ball to builders demonstrating that, if you want, you can.

The cost of building a house of this type would be lowered if many be erected at the same time. Besides would be breaking that housing exported more electricity than they consume everything that it would. We must expect that the price per square meter in this house was given 1,430 euros, something close to social housing in Wales which lies between 800 and 1000 pounds.

20Aug/15
Project sunroof Google calculates the money you would save if you had solar panels on your home

Project sunroof Google calculates the money you would save if you had solar panels on your home

Project sunroof Google calculates the money you would save if you had solar panels on your home

Yesterday we discovered with puzzlement as a German neighborhood in the city of Freiburg produces four times more energy than it produces. And that has a city where they have 1800 hours of sunshine a year, nearly half some of the indexes you have some Spanish cities, so we can quickly show how badly we are doing in this regard in our country.

Something that has to do much with this one is that Google’s new project launched this week and has referred to as “Project Sunroof”. This will calculate the potential of housing for the possible implementation of solar panels. Say that calculates the hours of sunshine a year it receives the roof, for example, your home, so give an estimate of how much money ahorrariais.

Those who live in Boston, the San Francisco Bay and Fresno, have been invited to enter your address on the landing page for Project Sunroof which is the availability of hours of sunshine per year and how much money you would save if they were installed solar panels.

Google says that calculates this information with a database of aerial maps that get perform 3D modeling of the roof. Taking into account the shadows cast by the trees or nearby structures, and then calculates all possible positions of the sun over a whole year. It also includes the history of cloud patterns and temperatures that affect the production of solar energy.

Once all this is calculated, the amount of money you would save if you make leasing of solar panels for 20 years, using a loan to purchase or buy directly appears. Another advantage is that you can even change the amount of roof cover with solar panels if anything the user does not want to cover whole.

In a given example, a house with a rate of 1800 hours of sunlight per year would save $ 24,000 in 20 years including payment of solar panels. Now we just have to take account if you were in a province like Huelva which nearly doubles the number of hours of sunlight per year.

13Jul/15
Schlierberg, a German neighborhood where 4 times more energy than is produced is consumed

Schlierberg, a German neighborhood where 4 times more energy than is produced is consumed

Schlierberg, a German neighborhood where 4 times more energy than is produced is consumed

From the 70, Freiburg has been increasing its reputation and popularity as one of the ecological capital of Germany. In 1986 the city had a vision for sustainable programs that relegated better transport and energy efficiency are among the best in the world.

Schlierberg is one of their neighborhoods and have known that today generates more than 4 times the energy it consumes. A district that shows the way to become completely self-sufficient, because if now produce more energy than they consume, his goal is to be independent with new batteries powerwall Tesla.

As you might say, the future is there in front of us, we can only cross at him. Schlierberg consists of 59 wooden houses built with green materials in an area of 11,000 square meters.

Schlierberg, a German neighborhood where 4 times more energy than is produced is consumed

Among one of the virtues of this neighborhood and this city is that its inhabitants tend to move on foot or by bicycle, apart from solar energy available, reuse rainwater and use environmentally friendly materials in their buildings.

Freibourg Schlierberg, a German neighborhood where 4 times more energy than is produced is consumed

This neighborhood has in all homes with photovoltaic panels placed in the right direction to receive solar energy from the 1,800 hours of sunshine a year with. Freiburg, the city is among the regions with the most sunny days in the year.

According to Rolf Disch, the architect responsible for the project, the emission of nearly 500 tons of CO2 into the atmosphere is avoided. The houses are constructed so as to have a simple roof and wide eaves that allow the presence of sunlight during winter and protect the home during the summer.

One example to follow, and if we have that here in Spain we Huelva cities with more than 3,100 hours of sunshine a year, which we are not waiting. Just twice a region as referred to in this entry as Freiburg in Germany.