Green Power

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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.[/vc_column_text][vc_single_image image=”1225″ img_size=”large”][/vc_column][vc_column width=”1/2″ css=”.vc_custom_1550527924651{margin-top: 150px !important;}”][vc_single_image image=”1226″ img_size=”large”][vc_column_text]FRENELL’s technology competes with fossil-fuel power plants in regions with high solar irradiation. The capability of providing Thermal Energy Storage leads to high capacity factors and grid parity which is of prime importance for energy providers and major industrial consumers. Therefore, FRENELL’s technology can provide base load electricity and demand-responsive power input. The technology can be used in greenfield projects as well as to extend new or existing fossil-fired power stations.[/vc_column_text][/vc_column][vc_column][vc_column_text]Access to fresh water is vital for human development. In more and more regions of the world, an adequate supply of this precious resource is becoming increasingly challenging. FRENELL DMS® is paving the way for a sustainable source of freshwater.

FRENELL’s DMS® technology can be paired with a desalination solution based on the Multi-effect Distillation (MED) process for the treatment of sea and brackish water. The MED process is characterized by very low energy consumption compared with other thermal processes and is highly reliable and simple to operate. It can be run continuously for up to 24-hour-a-day with minimum operations and maintenance activities or supervision.

Even more value can be added in a cogeneration set-up where the MED process replaces the air cooled condenser in the power application.[/vc_column_text][vc_separator css=”.vc_custom_1550528035400{margin-top: -25px !important;}”][/vc_column][/vc_row][vc_row][vc_column width=”1/2″][vc_column_text]


Cost-effective energy storage is key to transitioning to a low-carbon society. Energy can be stored in the form of heat or electricity. A popular storage method for high-temperature thermal applications is a molten salt tank. Fact sheets created by the German Energy Storage Association, or BVES for short, show that molten salt tanks are around 33 times less expensive than electric batteries when it comes to storing a kilowatt-hour in them.[/vc_column_text][/vc_column][vc_column width=”1/2″][vc_single_image image=”1231″ img_size=”large”][/vc_column][vc_column][vc_column_text]Molten salt is currently the most common method to store heat in large CSP plants and provide a constant on-demand supply of solar power without the need for fossil fuel backup systems. Companies such as German-based Frenell, formerly Novatec, offer a turnkey solution combining a solar field and a proprietary direct molten salt technology. This solution can be used, for example, in seawater desalination and enhanced oil recovery. “We have made improvements to our systems, which uses molten salt directly as the heat transfer fluid,” Max Mertins, CTO of Frenell, said. “They allow for a large temperature difference, around 280 K, and lead to heat storage costs ranging from 15 to 25 EUR/kWhth.”[/vc_column_text][vc_row_inner][vc_column_inner width=”1/2″ css=”.vc_custom_1551129818919{margin-top: -150px !important;}”][vc_video link=”″][/vc_column_inner][vc_column_inner width=”1/2″][vc_column_text]

Operating temperature150 to 560 °C
Storage capacity75 to 200 kWh/m3
Storage capacity40 to 110 kWh/ton
Storage efficiency90 to 99 %
Lifetime (cycles)10,000
Lifetime20 years
Daily heat loss1 to 5 %

Main properties of state-of-the-art molten salt storage tanks
Source: BVES[/vc_column_text][/vc_column_inner][/vc_row_inner][vc_column_text]The costs in euros per kilowatt-hour also depend on the storage temperature, as this temperature has an influence over how much energy is stored, given the same initial capital expenditures. For example, storing heat at 550 °C could double the storage capacity compared to heat at 400 °C, which means that the costs per kilowatt-hour will be cut in half.[/vc_column_text][/vc_column][/vc_row][vc_row][vc_column width=”1/2″ css=”.vc_custom_1552241197490{margin-top: 100px !important;}”][vc_column_text]

Energy storage system from CSP via liquid air.
This new energy storage solution has already been implemented,
but the costs are still high. It could be a future solution for upgrading the Mw that will be necessary with the increase in energy demand from our miners.[/vc_column_text][/vc_column][vc_column width=”1/2″ css=”.vc_custom_1552241010582{margin-top: -150px !important;}”][vc_video link=”″][/vc_column][/vc_row]