The Windbooster project (en)

THE WINDBOOSTER

PROJECT

The wind turbineThe function of a wind turbine is to “steal” energy to the intercepted air flow and convert it into

electricity.

WIND TURBINE

HORIZONTAL AXIS

WIND TURBINE

UPWIND

DOWNWIND

VERTICAL AXIS

WIND TURBINE

DARREIUS

SAVONIUS

GORLOW

DARREIUS - SAVONIUS

28/09/2013 The Windbooster project

The Windbooster technology (1/2)

INSTALLATION AT THE ITALIAN EMBASSY IN BRAZIL


The Windbooster technology (2/2)

Windbooster is a vertical axis wind turbine

fed by a conveyed stream designed to solve

the drawbacks that limit the efficiency of

traditional wind turbines with vertical axis.

Windbooster is a wind turbine specially

designed for “on-roof” installation.

The rotating part of the machine (the so-

called “rotor”) is completely contained within

a static “conveyor”. This characteristic

makes the product particularly suitable for

installations in urban environments: in case

of structural failure (remote event but

possible) the conveyor carries out the

function of a screen and avoids the ejection

of solid fragments potentially dangerous.

The conveyor also carries out the

important task of improve the quality of the

air flow which feeds the inner rotor: the

Windbooster is able to use more efficiently

the turbulent flows available in case of

installations in urban environments with an

overall size clearly lower than the

competitors with the same rated power.


Windbooster 1.0: power curveThe wind turbine power curve describes, from power point of view, the “real” behavior of a wind

turbine with the change in wind speed (net of all aerodynamic, mechanical and electrical losses).

It is shown the mechanical and electrical power curve, power expressed in W (left y-axis). In addition

are shown efficiencies of devices that are integral part of the wind turbine electrical system (right y-

axis). The instantaneous speed of the wind is shown in x-axis.


Status of the projectü Intellectual property protection: it is in

the final stage the procedure for the

submission of the patent application.

ü Competitor analysis: it is on going a

market analysis of vertical axis wind

turbines with a rated power in the

range 300 W ÷ 3 kW. To date they are

been considered 19 wind turbines.

ü Characterization of the wind turbine: a

Windbooster 1.0 (rated power of 1 kW)

was installed in a test site. To date the

"track record" has a time extension

equal to 1 year.


Comparison with competitorsThe Windbooster 1.0 is compared with the selected wind turbines (competitor analysis) considering

the following efficiency parameters.

Parameter name Specific parameter Integral parameter

Power coefficient yes no

Annual Energy Production no yes

Specific Annual Energy Production yes yes

Annual Energy Production / cost no yes

An efficiency parameter is defined as “specific” if it takes into account the size of the wind turbine: it

allows to compare machines with different sizes, making the production of energy concerning to the

size of the wind turbine.

An efficiency parameter is defined as “integral” if it takes account of all possible operating conditions

that the wind turbine can experience: it looks at the overall performance of the wind turbine in a

certain time interval.

To make more meaningful the comparison with competitors, when it is made using a “specific”

parameter the comparison is extended to all selected wind turbines (rated power in the range 0.3 to

3 kW), while when the parameter is not “specific”, the comparison is limited to wind turbines with a

rated power similar to that of Windbooster 1.0 (≤ 1.5 kW).


Windbooster 1.0: power coefficientThe power coefficient measures how much the wind turbine is efficient in subtract energy to the

feeding air flow: efficiency not only in terms of power subtracted but also in terms of space required.

It is shown a comparison between power coefficient average values: the average is performed on

power coefficient values developed in the range of wind speed values from 3 to 15 m/s. The

Windbooster 1.0 gets the better of all competitor turbines!


Windbooster 1.0: Annual Energy ProductionIt is shown the Annual Energy Production (AEP), expressed in kWh, versus expected annual average

wind speed values. The Windbooster 1.0 (red curve) is particularly suitable for use in environmental

contexts characterized by medium/low wind speed values (less than 7.5 m / s).


Windbooster 1.0: specific AEP (1/2)It is shown the specific Annual Energy Production, expressed in kWh/m2, versus expected annual

average wind speed values. The Windboobster 1.0 (red curve) appears to be a turbine with an high

specific AEP: it overcomes all turbines with the same rated power and it competes against the bigger

wind turbines thanks to its smaller overall dimensions.


Windbooster 1.0: specific AEP (2/2)It is shown the specific Annual Energy Production, expressed in kWh/m2, versus expected annual

average wind speed values. The Windboobster 1.0 (red curve) appears to be a turbine with an high

specific AEP: it overcomes all turbines with the same rated power and it competes against the bigger

wind turbines thanks to its smaller overall dimensions.


Windbooster 1.0: specific AEP % (1/2)It is shown the specific Annual Energy Production, expressed in percentage of Windbooster 1.0

specific Annual Energy Production, versus expected annual average wind speed values. The red line

(Windbooster 1.0) separates turbines with higher specific AEP (ordinate> 100%) from those with a

lower specific AEP (ordinate <100%).


Windbooster 1.0: specific AEP % (2/2)It is shown the specific Annual Energy Production, expressed in percentage of Windbooster 1.0

specific Annual Energy Production, versus expected annual average wind speed values. The red line

(Windbooster 1.0) separates turbines with higher specific AEP (ordinate> 100%) from those with a

lower specific AEP (ordinate <100%).


Windbooster 1.0: AEP/cost %It is shown the AEP/cost ratio, expressed in percentage of Windbooster 1.0 AEP/cost ratio, versus

expected annual average wind speed values. The Windbooster 1.0 gets the better of all competitor

turbines with the same rated power.


The Windbooster series: use the experience gained with the model

Windbooster 1.0 to develop a new range of products.

Windbooster project developments

ü Identify power classes more "attractive" for the market.

ü Develop a technical solution for a multi-turbine plant ("totem").

ü Develop a technical solution for a hybrid plant (solar + wind).

ü Identify an efficient and economical technical solution to equip the

Windbooster series with a storage system.

ü Improve the product aesthetics to make it more suitable for urban

installation.


The Windbooster technology today: consumer profiles

ON-GRID SOLUTIONS

OFF-GRID SOLUTIONS

Solution Windbooster system Inverter Dump load

Small (1 kW) 1.0 2 .7 kW 2 kW

Medium (2 kW) 2 x 1.0 3.0 kW 4 kW

Large (3 kW) 3 x 1.0 3.6 kW 6 kW

Solution Windbooster system FV Storage

Basic (1 kW) 1.0 - 310 Ah@48 V

Smart small (1+1 kW) 1.0 1 kW 310 Ah@48 V

Smart medium (2+2 kW) 2 x 1.0 2 kW 520 Ah@48 V

Smart large (3+3 kW) 3 x 1.0 3 kW 750 Ah@48 V


The Windbooster technology today: business profiles

ON-GRID SOLUTIONS

Solution Windbooster system

Feed-in tariff

[€/kWh]

MFIT12 4 x 3 kW 0.291

MFIT15 5 x 3 kW 0.291


The Windbooster teamAndrea ScaliEntrepreneur

Partner and Chief Executive at Treecube Srl

Roberto BarontiniFull professor of Corporate Finance

Institute of Management

Scuola Superiore Sant’Anna

(Financial area)

Luca ValentiMechanical engineer

Partner at Treecube Srl

Inventor and designer of Windbooster technology

(R&D)

Alessio DazianoElectro-mechanical technician

(Production)

Federico GuidiAerospace engineer

(Engineering and product development)

Carlo ArcuriPost Graduate Master Degree

Management and Innovation

(Sales and Marketing)


Treecube S.r.l.HeadquartersVia Ugo Foscolo, 2519125, La SpeziaE-mail: [email protected] line: +39 3486604326

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