Intro Video
GEMSTAR
LIGHTING UP THE FUTURE TOGETHER
Slide 1
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About Us

GEMSTAR, the Ocean Kite, is a large-scale technology for the generation of electricity from slow-moving flows of water, namely river, tidal or water currents in general.
Thanks to an innovative design, it is unique among renewable energy generators.

An Italian excellence, developed over the last decade, which combines competitiveness and environmental sustainability offering a clean and efficient solution on both the national and international market.

The first studies were carried out at the University of Naples “Federico II” by the ADAG research group under the direction of Prof. Domenico Coiro. Focused on overcoming the obsolete technology widespread at a prototype or pre-industrial level, the GEMSTAR has one goal: to produce as much electricity as possible at the lowest possible costs - and in an environmental friendly and reliable way.
By focusing resources and outstanding know – how, GEMSTAR is strongly competitive on the highly regulated and competitive energy market, typically distinguished by environmental uncertainty and where on going technology is strongly demanded.

Image is not available

About Us

GEMSTAR, the Ocean Kite, is a large-scale technology for the generation of electricity from slow-moving flows of water, namely river, tidal or water currents in general.
Thanks to an innovative design, it is unique among renewable energy generators.

An Italian excellence, developed over the last decade, which combines competitiveness and environmental sustainability offering a clean and efficient solution on both the national and international market.

The first studies were carried out at the University of Naples “Federico II” by the ADAG research group under the direction of Prof. Domenico Coiro. Focused on overcoming the obsolete technology widespread at a prototype or pre-industrial level, the GEMSTAR has one goal: to produce as much electricity as possible at the lowest possible costs - and in an environmental friendly and reliable way.
By focusing resources and outstanding know – how, GEMSTAR is strongly competitive on the highly regulated and competitive energy market, typically distinguished by environmental uncertainty and where on going technology is strongly demanded.

Slide 2

The Gemstar Project

GEMSTAR consists of two counter-rotating turbines, mounted on the sides of a submerged structure that contains the electronic components. The tail planes guarantee longitudinal and lateral-directional stability and the whole system is capable of continuously aligning itself to the flow even during the tide inversion.

GEMSTAR is held in position, at the desired depth, by means of an tethering system to the bottom consisting of a winch, an anchoring screw in the seabed and a mooring cable.

Thanks to the possibility of choosing the operational depth, GEMSTAR will always intercept the best quality of the current flow and its maximum velocity on the site, also allowing the vessel pass trough

During operation, GEMSTAR behaves like a sort of submarine kite that remains fixed thanks to the balance between the thrust acting on the turbine and the structure, and buoyancy force of the hollow part of the structure.

For maintenance , GEMSTAR can be brought to the surface releasing the tension of the mooring line; also, an heading direction control system avoids the uncontrolled rotation around the vertical axis and the related possible excessive twisting of the mooring and power cables.

Image is not available
Image is not available

The Gemstar Project

GEMSTAR consists of two counter-rotating turbines, mounted on the sides of a submerged structure that contains the electronic components. The tail planes guarantee longitudinal and lateral-directional stability and the whole system is capable of continuously aligning itself to the flow even during the tide inversion.

GEMSTAR is held in position, at the desired depth, by means of an tethering system to the bottom consisting of a winch, an anchoring screw in the seabed and a mooring cable.

Thanks to the possibility of choosing the operational depth, GEMSTAR will always intercept the best quality of the current flow and its maximum velocity on the site, also allowing the vessel pass trough

During operation, GEMSTAR behaves like a sort of submarine kite that remains fixed thanks to the balance between the thrust acting on the turbine and the structure, and buoyancy force of the hollow part of the structure.

For maintenance , GEMSTAR can be brought to the surface releasing the tension of the mooring line; also, an heading direction control system avoids the uncontrolled rotation around the vertical axis and the related possible excessive twisting of the mooring and power cables.

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Slide 1

Why Gemstar

Placed in a dominant position compared to international competitors, GEMSTAR overcomes the blocking elements that characterize the obsolete prototypes offered on the European and global market.

Reliability and efficiency

Reliability and efficiency

By being able to adjust the operating depth, GEMSTAR is always positioned below the water column affected by waves and storms and therefore intercepting the fastest currents in order to maximize annual energy production.

#sustainable
Easy and inexpensive maintenance

Easy installation and inexpensive maintence

Gemstar overcomes a high number of difficulties faced by traditional installing systems thanks to the single point mooring system technology thus increasing the number of suitable installation sites worldwide.

#adability
No Visual Impact

No visual impact

Gemstar is completely immersed, therefore it does not determine any visual or landscape impact and is by no means an obstacle to marine navigation

#ecofriendly
Safety features

Safety features

Possible interferences with ship traffic are practically avoided thanks system’s ability to set its operative depth through the mooring cable and the winch.

#safetyfirst
Business opportunities

Business opportunities

GEMSTAR technology can be easily customized on the basis of the requirements of each installation representing a large market opportunity for EU industries.

#market-penetration
TRL 5-6
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GEMSTAR’S EVOLUTION

TRL 5-6

100kW prototype tested in real sea environment (Venice Lagoon)
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GEMSTAR’S EVOLUTION

TRL 8 - 7

100kW prototype deployed and tested in Venice Lagoon
TRL 4-5
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GEMSTAR’S EVOLUTION

TRL 4-5

Second small scale prototype and water tank tests
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GEMSTAR’S EVOLUTION

TRL 6 - 5

1:5 scaled model fully tested in water tank
TRL 4

GEMSTAR’S EVOLUTION

TRL 4

Design and numerical analysis of full system, first small scale prototype and water tank tests
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GEMSTAR’S EVOLUTION

TRL 5

First scaled model’s functions validated in naval tank
TRL 3
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GEMSTAR’S EVOLUTION

TRL 3

Diffuser design, wind tunnel, open air and water tank tests on isolated turbines
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GEMSTAR’S EVOLUTION

TRL 4

Technology validated in lab
TRL 2
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GEMSTAR’S EVOLUTION

TRL 2

Blade design, numerical and wind tunnel rotor tests
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GEMSTAR’S EVOLUTION

TRL 3

Analysis and optimization of components
TRL 1
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GEMSTAR’S EVOLUTION

TRL 1

Initial concept and preliminary design of GEMSTAR system
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GEMSTAR’S EVOLUTION

TRL 2-1

The concept
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Slide 2

100 kW Gemstar Datasheet

DIMENSIONS

Length: 9.2 m
Height: 5.2 m
Width: 10.4 m
Total weight: 10700 kg

PERFORMANCE DATA

Buoyancy force: 5200 kg
Depth (range): 15 m to 9.8 m (without current)
Nominal power: 100 kW with a tidal current of 2.6 m/s
Three-blades 3 m diameter rotor
Innovating blade section profiles
Carbon blades - Fiberglass diffuser
Rated rotation speed: 65 rpm
Rotor Efficiency: 0.8
Expected average yearly production with 2.5 m/s maximum speed site: 300 MWh

Image is not available
Image is not available

100 kW Gemstar Datasheet

DIMENSIONS

Length: 9.2 m
Height: 5.2 m
Width: 10.4 m
Total weight: 10700 kg

PERFORMANCE DATA

Buoyancy force: 5200 kg
Depth (range): 15 m to 9.8 m (without current)
Nominal power: 100 kW with a tidal current of 2.6 m/s
Three-blades 3 m diameter rotor
Innovating blade section profiles
Carbon blades - Fiberglass diffuser
Rated rotation speed: 65 rpm
Rotor Efficiency: 0.8
Expected average yearly production with 2.5 m/s maximum speed site: 300 MWh

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Slide 1
GEMSTAR next step
300kW

Moving forward towards the construction of TRL8 300 kW prototype to be installed in the Strait of Messina requires significant associates. Partnerships are key to the next step in Gemstar’s future. We are only 12 months away from lighting up the future together.

FUNDING CAMPAIGN

OUR GOAL 3.5mln
0%

Pledged: 1 mln €
Seeking : 2.5 mln €

GEMSTAR next step
300kW

Moving forward towards the construction of TRL8 300 kW prototype to be installed in the Strait of Messina requires significant associates. Partnerships are key to the next step in Gemstar’s future. We are only 12 months away from lighting up the future together.

FUNDING CAMPAIGN

OUR GOAL 4mln
0%

Pledged: 2 mln €
Seeking : 1 mln €

Contact

Partner with us!






    Carees

    At the heart of every great change is a great human. If you have ideas, ingenuity and a passion for making a difference, come and be a part of our team. Together, we work to harness meaningful, powerful change.

    JOIN US by sending your CV to
    info@gemstar.it