How does a natural circulation solar thermal panel work?
The natural circulation solar thermal panel is an efficient and sustainable solution for the production of domestic hot water (DHW) in private homes. Among the leading companies in this sector, Pleion stands out for the innovation and reliability of its products.
- What is a natural circulation solar thermal panel?
- How does a natural circulation solar thermal panel work?
- When is a naturally circulating solar panel worthwhile?
- Why is a solar thermal panel with natural circulation worthwhile?
- Which is the best circulation for a solar thermal system, natural or forced?
- What are the solutions proposed by Pleion?
What is a natural circulation solar thermal panel?
The solar thermal panel with natural circulation exploits the free energy of the sun to heat domestic water, in a simple, sustainable way and without the use of electricity. This system can have an external storage tank, as in the case of Pleion’s FREE Systems, or integrated, as in the case of the innovative EGO solar panel.
How does a natural circulation solar thermal panel work?
A solar thermal panel with natural circulation exploits the physical principle of natural convection: the water heated by the sun moves upwards inside the collector (Pleion’s EGO systems) or reaches the storage tank located above the collector (Free systems), without the aid of pumps or mechanical devices. At the same time, the cold, heavier water descends while maintaining circulation. This process is called natural circulation.
Natural circulation solar panels are particularly suitable for single-family homes and second homes, due to its simplicity and reliability.
When is a naturally circulating solar panel worthwhile?
The natural circulation solar thermal panel is particularly suitable for:
- Homes in sunny areas;
- Locations with mild or warm weather all year round;
- Residential structures without large consumption or central heating systems;
- Users who want to minimize their energy impact and costs.
In cold climates, solar thermal with natural circulation may be less efficient: in this case, a forced system or the use of frost protection is recommended.
Why is a solar thermal panel with natural circulation worthwhile?
- Quick and easy
assembly The system consists of a few pre-assembled elements (manifold and possible tank) and does not require electrical connections or complex control units. Installation can take place in a short time even on existing roofs. - No electricity
consumption Water moves naturally thanks to the heat of the sun, without the need for pumps or regulators powered by electricity. This makes the system ideal even in the absence of electricity or in isolated areas. - Lower upfront costs than forced
systems The absence of electrical and control components significantly lowers purchase and installation costs. It is a cost-effective yet efficient solution. - Minimized
risk of failure Fewer components = less chance of something breaking. The system is basic and robust, with very little maintenance required. - Low management and maintenance
costs Since there are no pumps, control units or electronics to check, maintenance is limited to periodic checks of the tank and hydraulic connections. Annual operating costs are almost nil. - Energy independence
Running solely on the sun, the system is completely self-sufficient. It reduces dependence on electricity or gas, improving domestic sustainability.
Which is the best circulation for a solar thermal system, natural or forced?
Both systems use solar energy to produce hot water, but differ in structure, operation and performance.
Forced circulation system
It uses an electric pump to move the heat transfer fluid (water and glycol) from the manifolds to the tank. Its main features are:
- Complex structure: includes manifolds, tank, pump, control unit and valves;
- Possibility of integrating them with space heating;
- High efficiency: guarantees constant performance even in unfavorable weather conditions;
- Higher cost: requires a higher investment and the use of electricity.
Natural circulation system
It uses natural convection: the fluid moves by itself, thanks to the difference in temperature between hot and cold water.
- Simple and autonomous: it does not use pumps or electrical components.
- Cheaper: it has low installation and maintenance costs.
- Limited in cold climates: less suitable where solar radiation is scarce or discontinuous.
The choice depends on personal needs, climate and budget. The natural system is ideal for those looking for simplicity and savings, while the forced system guarantees superior performance in every season.
What are the solutions proposed by Pleion?
Pleion offers solutions for solar thermal with natural circulation, designed to ensure maximum efficiency and durability. Among the flagship products:
- EGO and EGO Prime systems: Innovative ALL-IN-ONE panels in which domestic water is contained directly inside the manifold. These naturally circulating panels do not require an external tank, but can be supplemented with the optional SOLARBANK pipe to increase its capacity.
- Free Systems: These systems combine high-performance solar collectors with integrated 150-200-300 lt boilers, offering a compact and easy-to-install solution. The proposed configuration reduces the footprint and guarantees efficient operation, ideal for those looking for a practical and high-performance solar thermal system.
These products are designed to offer high energy efficiency, ease of installation and a design that blends harmoniously with the aesthetics of the home.
These are just a few of Pleion’s many natural circulation panels. To learn more, consult the page dedicated to natural circulation solutions.
If you would like to receive more information about the choice and installation of solar thermal, please contact us!
