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Aprotec
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APROTEC is a company, which develops technologies and systems for the use of renewable energy. They focus on the efficient use of energy and respect for the environment of technologies in social development projects. They were founded in 1990 and are based in Columbia.
[[Image:Aprotec.jpg|thumb|right|150px|Aprotec]]
Aprotec deals with several aspects in the field of renewable energy technologies, from the promotion and commercialisation to the development and production of these.
==Photovoltaic solar power==
Photovoltaic cells directly convert sunlight into electricity. There are two methods of implementation. In an ‘isolated’ system, all the energy from the solar panels is collected in batteries. This can then be converted into an AC current, using a transformer. This system Solar energy can also be used as an ‘interconnected network’ where the panels are connected directly to the AC local power grid.
[[Image:Photovoltaic solar power system.jpg|thumb|right|150px|Photovoltaic solar power system]]
==Thermal solar Power==
Solar Heaters: These work by heating water in a tank. There are two systems for this, the thermosyphon method and the gravity system. They also developed a system to directly use solar energy for maintaining the temperature of outdoor swimming pools. It primarily uses the existing pump used for purifying the water to circulate the water and a thermostat.
[[Image:thermosyphon.jpg|thumb|right|150px|thermosyphon]]
[[Image:solar heater.jpg|thumb|right|150px|solar heater]]
==Wind Power==
Aprotec also sells wind generators, which convert wind energy into electricity. They have also developed a system, which uses wind energy to pump water from the ground. Further in certain areas, windpower can be used in combination with solar power, for times when the wind is quiet. [[Image:windmill with solar panels.jpg|thumb|right|150px|Windmill with solar panels]]
Further they offer specialised equipment for measuring the wind potential of areas. These are leaning towers with a height of 30-60m, with sensors to measure the wind speed, wind direction, temperature, humidity and pressure at different heights. This information is then stored digitally and transmitted to collection centres for analysis.
PICO hydropower: Aprotec designed a system that uses hydropower from small water sources and converts it to direct current electricity. The water is filtered, cleaned and transported to through PVC pipes to turbines. The electric current produced here is then transported to a charging centre, where people can recharge batteries.