Since 1973
 
 
 
Renewable Energies

Renewable Energies

Since 1973 providing top engineering services


Renewable energy is called the energy obtained virtually inexhaustible natural sources, some of the vast amount of energy they contain, and others because they are able to regenerate by natural means.

In our company we carry out projects that involve all kinds of renewable energy, including the most common are:

  1. Solar Thermal Energy
  2. Photovoltaics
  3. Geothermal Energy
  4. Biomass
Solar Thermal Energy



Solar Thermal Energy is a technology for harnessing solar energy for thermal energy, thanks to solar thermal collectors, for hot water, heating or heated pools.

Anyway, the Solar Thermal System Energy use the heat of the Sun, thanks to solar collector, to produce hot water and heating or heated pools.

In any case, a solar thermal energy facility needs the support of a conventional energy system (gas or diesel boiler, heat pump, etc.).

Its use can be an interesting complement as support to the heating in some systems with water below 60°C (under floor heating system or fan-coils). Additionally, it is used to heat liquids in industries.

The under floor heating is a optimal system to work together with solar energy. It consists on several pipes under the house floor and there are multiple advantages as opposed to radiators systems (energy saving and the confort provided).

An very interesting application is the cooling thanks to an absorption system combined with a solar thermal energy system, because the time with more demand (summer) meets the most produced one.


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There are different ways to use solar thermal energy:

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Photovoltaics



Photovoltaics is a method of generating electrical power by converting solar radiation into direct current electricity using solar cells that exhibit the photovoltaic effect.

Photovoltaics is the electric energy obtained directly from the sun thanks to panels formed by photovoltaic cells, using the photovoltaic effect to convert solar radiation into direct current electricity.

When there are sunlight, the photovoltaic cells generate direct current electricity stored in the batteries. In the moments with energy consumption, the batteries provide to the user this electricity converted in altern current.

Its use is recommended in housing, hotels, shelters or cultivations in isolated environment which need a generator to consume electricity, due to the absence of a connection to a grid.

It is not advisable the use of photovoltaics in houses with an existing connection because of the cost and the comfort. If there are enough space, what can be done is develop this kind of facilities to sell energy to the electric company. These facilities are granted, and its use is an investment of future for a family, because the useful life for a photovoltaic cell is 30 years.

There are different types of photovoltaic cells:

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Geothermal Energy



Geothermal energy uses the heat of the sun stored on the floor to heat buildings and provide hot water organically. It uses a geothermal heat pump that exploits the ability of the subsoil to keep thermal stability of about 15°C between 15 and 20 meters deep.

This is a genuine efficiency energy process. Producing air conditioning, heating, and hot water with a minimum consumption, simultaneously, thanks to the application of a heat pump, which profits geothermal characteristics of the subsoil, and all from the same equipment.


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The subsoil keeps a constant temperature along the year, independently weather conditions.

Profiting this circumstance, it can be installed a geothermal heat pump. They are machines highly efficient. They do not use the energy to produce heat, as boilers, instead of moving the heat around, becoming much more efficient than the combustion.

A heat pump is a reversible system, i.e., moving the heat, it can take it out or get it into where we want. A whole of pipes under the subsoil, which water pass through, giving up or removing heat of the floor, to get cooling or heating, depending on the season of the year.

The application of the geothermal energy is based on this principle. A conventional heat pump exchanges heat with air, i.e., absorbing the heat included in the air or giving up the heat to the air. The conventional geothermal pump uses the subsoil to do this exchange. As always subsoil is about 15°C it is easier to heat the house from this temperature than the outdoor one in winter. The stability of this temperature is the main advantage of this technology, which gets better equipment performances and, as a consequence, energy savings.

The performance of a geothermal heat pump, cooling or heating, overcomes in a 50% to a traditional HVAC system with a heat pump. In winter, the performance is high and constant regardless of the temperature outside.

Types of Geothermal Systems:

Advantages of the domestic geothermal:

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Biomass



The term biomass is a very general concept that encompasses the use of any organic matter of vegetable or animal origin, in order to generate energy, usually through combustion.

Biomass boilers are designed to improve the energy performance. We can avoid the installation of gas or solar panels, getting as well a better Energy Rating.

There are very different types of biomass. It covers materials as: firewood, forest residues, pruning, bushs, straw, timber, paper and food industries, products, olive stones and skin of the nuts, manure, municipal solid waste, animal waste and blackwater, among others.

The most important part of these products can be used as fuel, whether burning them or transform them in other ways of fuel like biogas or biofuels.


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The main applications are the production of hot water, heating systems, heated pools and industrial process.

In the modern biomass boilers are automated, having a automatic cleaning for the heat exchanger and steam visibles are not produced. The resultant ash is compacted and removed only 2 or 3 times per season.


Biomass

For its use is necessary the use for a storage silo. The ash compaction system that prevents current boilers have frequent removal of the same, reducing this task to 2 or 3 times per season.


Biomass

Currently, the most extended boilers and heaters use pellets. Wood pellets are generally made from compacted sawdust or other wastes from sawmilling and other wood products manufacture. They are dehumidified and compressed to optimize their volume for a simpler transport and storage.

The energy content is high becoming more economic. This type of heaters and boilers generated the same comfort with a saving approximately of 40-60% (depending on the area considered), comparing to a gas boiler.

Biomass is a ecological fuel and renewable, which do not contribute to the greenhouse effect. The gas produced for its burning have a less proportion of sulfur compounds, which caused acid rain, than those coming from carbon burning. As well, CO² is released into the atmosphere, but this CO² is the same as it was absorbed for its growth.

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