Why solar thermal energy systems may be the planet's lifejacketWhat is our energy needs?
All over the world, energy efficiency requirements has turned the actual energy consumption to less needs for electricity. This is because all manufacturers of light bulbs, PC's, TV's, freezers, refrigerators, ovens and other appliances has successfully been certified with energy labels that tells the users how much energy they may save by selecting the right equipment. Consequently, our need for energy that drivers these apparatuses is decreasing rapidly.
That is not the case for heating, cooling and hot water demands. While new apparatuses is considered a status and a better lifestyle, so is the trend towards more fancy bathrooms with tropic showers and bigger bathtubs and our seeking for better and more comfortable homes with generally higher indoors temperature during the cold season and generally colder temperature during the warm season. All of which increases our heating and cooling demands dramatically.What is solar thermal?
Solar thermal energy is a conversion of the solar energy in the Ultraviolet , Visible and near Infrared spectrum of the solar energy. Some of the technologies present on the market already, may utilize as much as 90% of the Sun's constant irradiation at the Earth's surface. This means that between 1,000 and 200 Watt's are converted into heat depending on your location and time of the year. Solar cells, on the other hand, only harvest in the visible spectrum and this is why:
1) The energy efficiency is up to 90% for solar thermal opposed to ≈ 15% for solar cells.
2) Cost of solar thermal is 0.05 € per kWh opposed to solar cells at 0.22 € per kWh. In imperial units 204 USD per BTU for solar thermal opposed to 853 USD per BTU for solar cells
3) The CO2-emission for solar thermal is at 3 grams per kWh opposed to 28 grams for solar cells. In imperial units 22 lb per BTU for solar thermal opposed to 210 lb per BTU for solar cells.The benefits of solar thermal
Solar thermal energy is locally produced hot water that can be used to heat up your building and hot water supply or as cooling of buildings.
You will usually have your money back within 4 years and the installations will last for more than 30 years.
-No grid needed
-Low or no maintenance
-No more heavy energy bills
More about solar thermal energy systems: www.catchsolar.net
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