Pure Energy

     Environmental efforts to combat climate change through the production of biofuels lead to aggravation of a type of air pollution will cause 1,400 premature deaths annually by 2020, says a new study.

     The report published by British researchers shows that trees grown to produce biofuel - considered a cleaner alternative to coal and oil - a substance released into the air, mixed with other pollutants, causing reduced agricultural production.

       "People think that biofuels are a good thing, because they reduce the level of carbon dioxide in the atmosphere," says Nick Hewitt, who worked on the study with colleagues at Lancaster University. "What we say is' yes, this is great, but biofuels can also have a detrimental effect on air quality," said Hewitt.

       The report published in the scientific journal Nature Climate Change focused on the effects of a program designed by the European Union in which biofuels are produced more to combat climate change. Hewitt says that harmful effects are the same in every place where biofuels are produced in large quantities.

      Poplars, willows and eucalyptus trees, three trees that grow quickly are used as a source of biofuel, emit a significant amount of isoprene as they grow, the researchers noted. Isoprene form ozone, a toxic substance when mixed in sunlight with other pollutants.

     "Widespread production of biofuels in Europe would have little effect, but signified, the death rate and the productivity of agriculture," says Hewitt.

      The report estimates that ozone generated trees used to achieve the target for 2020 set by the European Union would cause 1,400 premature deaths annually, costing the company $ 7.1 billion.

      EU plan would reduce the annual amount of wheat and maize crop of 1.5 billion dollars, because ozone reduces productivity of the field, researchers say.

     Scientists recommend placing biofuel plantations popluate far from urban centers to limit the production of ozone. They also say that genetic engineering could be used to reduce emissions of isoprene.

     Ozone can cause lung problems, considered guilty for the deaths of 22,000 people each year in Europe. In total air pollution (caused mainly by fossil fuels) causes about 500,000 premature deaths each year in Europe.

     Burning biofuels is considered to have neutral effects on climate change, because plants absorb carbon dioxide as they grow and release it when they burn or decompose. Fossil fuels, however, adds carbon dioxide to the atmosphere, releasing it from underground deposits.

     Biofuels are considered responsible for higher food prices due to competition for agricultural land with plants that produce food crops. In response to these criticisms, the European Commission announced last year that it intended to limit biofuels from agriculture to 5% of all fuel used in transportation.

                Geothermal heating systems use the earth as a heat source for heating homes, but also in the industrial processes, such as fish ponds or water heating in the dairy industry or to produce electricity. As the temperature remains constant in the vicinity of Earth crust surface soil to a depth of about 3 meters, this level is installed underground pipes by circulating a fluid that is to take heat from the ground. With the pump, it is directed to a heat exchanger, where the heat is distributed throughout the house via a ventilating equipment.
               The geothermal system is composed of three parts: heat exchange unit with the ground heat pump itself and the air supply system. The heat exchanger consists of a set of pipes arranged in spiral, buried in the upper terrestrial crust, near the building. The heat transfer from the soil inside the house involves a series of operations consisting of evaporation, compression, condensation and expansion. The cycle starts when cold frigorofic agent passes through the heat exchanger and absorbs heat from the source, with lower temperatures.

What is a heat pump?

               A device that transfers heat in the opposite direction that it has it in its natural movement. Thus, if the nature of the heat flows from the warmer body to the colder body, heat pump reverses the circuit, moving heat from a lower temperature source to a higher temperature heat sink. Heat pumps are refrigerators, freezers, air conditioners and heat inverters. When it comes to air conditioning, heat pump includes a two-way valve so that the direction of heat flow can be reversed: from the inside to the outside, while the interior has cooled (summer), or from the outside to the inside, when inside be heated (in winter). Usually, a reversible pump is a pump with lower efficiency one way (which may be cooling pump, or heating).

What are the advantages and disadvantages of heat pump?

               Probably the most important advantage of this system is that it provides fuel independence of any kind as they (gaseous, solid or liquid). It takes energy from the natural environment, potentially inexhaustible and delivered house to condition air to pre-heat the domestic water or the pool. Energy source can be soil, air or water surrounding groundwater. However, the pump can do these transfers without mechanical work, so without taking some energy. More clearly said, the installation can not transfer heat between the two environments without the use of a quantity of electricity. It consumes, the more electricity, as the temperature difference between the heated and the need to provide greater warmth. In other words, the energy efficiency of the heat pump is inversely proportional to the temperature difference between the two environments.

Save energy, we live in harmony with nature and will protect future generations.

Exploitation of solar energy through solar panels

               Solar energy is the cleanest source of energy and is virtually inexhaustible. It can be captured by solar panels that absorb the Sun's heat, and hot water tanks hand to ensure hot water or heating contribution to a house or a swimming pool. Another type of solar panel is photovoltaic panels that absorb light rays and turn them into household electricity.
              Solar systems with direct heat transfer can not be used in applications where heating water quality problems (hard water or acid) because the risk of clogging or corrosion ainstalatiei. The price of solar installations is quite high, but over time can lead to energy savings of up to 70%.
                In summer, domestic hot water is virtually free, this being possible after depreciation costs of installing solar systems. It can make a substantial saving of 50-60% annually for residential space heating and 80-90% or even 100% for domestic water heating. The investment for an alternative source of hot hot water and heating, is amortized over a reasonable time of 3-4 years. This period is shortened when using intensive installation.

Why should you use solar energy:

Easy to install
It's a clean energy source
Long period of operation, over 20 years
Safety in use (there is no danger of fire, explosion)
Utility provides hot water throughout the year, winter in combination with a source of heat, reducing energy consumption costs by about 65%
Operating costs and minimal maintenance

Saving energy, we will live in harmony with nature and will protect future generations.