The evacuated tube collector is an advanced solar energy utilization system that is used to convert solar radiation into thermal energy. The key to its efficient operation is the use of a vacuum, which minimizes heat loss , thereby increasing the system's performance, even in adverse weather conditions.
How does it work?
Capturing light energy: Vacuum tubes consist of several layers. The outer layer is transparent so that sunlight can penetrate unhindered, while the inner layer is coated with a special absorber layer that absorbs solar radiation and converts it into thermal energy.
The role of vacuum: There is a vacuum between the layers of tubes, which acts as an excellent thermal insulator. This design minimizes heat loss to the external environment, thus significantly increasing the efficiency of the collector.
Heat transfer to the liquid: The thermal energy produced by the absorber layer is transferred to a heat transfer liquid. This liquid can be water, antifreeze or a mixture of these, which flows inside the pipes.
Heat transfer: The heated fluid enters a heat exchanger where the heat energy is transferred to the heating system or to a storage tank for hot water production . The cooled fluid returns to the collector to be heated again, forming a closed circuit.
What is a vacuum tube collector used for?
- Hot water production: Ideal for domestic or industrial purposes, such as bathing, dishwashing, laundry or heating swimming pools.
- Heating support: Can be used effectively for heating buildings, especially in places where reliable heat production is needed even in cold weather.
- Industrial use: Can also be used in processes where large amounts of hot water or thermal energy are required, such as in food processing or agricultural facilities.
Why is it beneficial?
- High efficiency: Due to the vacuum insulation, heat loss is minimal, so the collector works efficiently even in weak sunlight or cold weather.
- Environmental awareness: Reduces the use of fossil fuels, thereby contributing to the reduction of carbon dioxide emissions.
- Long lifespan: Thanks to their weather-resistant design and durable materials, evacuated tube collectors have a long lifespan, often exceeding 20 years.
- Flexible applicability: Can be combined with different heating systems, such as underfloor heating or radiators.
Summary
The evacuated tube collector is a highly efficient and reliable solution for converting solar energy into thermal energy. Its application allows for significant energy savings while contributing to a sustainable future. The system is particularly recommended in locations where weather conditions are often unfavorable, but high-temperature hot water or heating support is needed.