Core Technologies

Solar Field

Linear Fresnel Technology!
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Thermal Energy Storage

24/7 thermal energy availability on demand!
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Control System

In-house DCS development!
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Cleaning System

Fully automated cleaning by robots!
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Solar Collector


FRENELL offers a Concentrated Solar Power (CSP) technology based on Linear Fresnel collector principle. Parallel rows of flat mirrors are mounted onto a sheet metal base structure. These lines reflect direct solar radiation onto a stationary receiver unit. Molten salt is pumped through the absorber tube and heated up to 550°C by the sun’s concentrated energy. The heat is transferred from the solar field to a Thermal Energy Storage system.
FRENELL established automotive manufacturing techniques to produce its primary reflectors and receivers in large volumes in fully automated in-house production lines with 100% quality control. The manufacturing facilities are mobile, to realize on-site production – minimizing transportation cost and increasing local content.

Thermal Energy Storage


FRENELL delivers Thermal Energy Storage multi-tank system with molten salt as storage medium. This medium is also used as heat transfer fluid in the solar field and is directly guided to the storage tanks. Solar generated thermal energy can be stored during day time for dispatchable energy 24/7.

Control System


The FRENELL control system was developed in-house developed and is based on standardized industrial automation components. It can be integrated easily into any power plant DCS system, as successfully realized within the Puerto Errado 2 project. It provides real time monitoring of process values and performance. Thereby the FRENELL Single Push Button Principle provides fully automated operation.
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Cleaning Systems


FRENELL offers integrated cleaning systems for both the Primary Reflectors and also the Receiver unit to facilitate uninterruptible daily operation in harsh desert environments. Very low water consumption and low labour intensity allow daily cleaning cycles of the primary reflectors – ensuring the highest levels of cleanliness and efficiency over the lifetime of the solar field. Furthermore, FRENELL offers an integral water-free Receiver cleaning system, which drastically reduces soiling of the optical components to maintain the maximum optical performance.
In addition, both cleaning vehicles can be equipped with monitoring kits in order to check the cleanliness of the reflectors and the vacuum quality of the absorber tubes, facilitating a precise and continuous status report even for large solar fields.
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