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FAQS test

Youwind FAQ

Youwind FAQ include specific questions about the usage, calculations, and specifications of our IT platform, as well as pre-sales topics, and general wind energy concepts that will help you to get started.

  • About Youwind
  • Platform usage
  • Platform calculations
  • Data sources
  • Wind energy
  • Wind farm components
  • Wind project

FAQ About Youwind

a

Am I going to receive technical support during the Project Pilot or Annual Subscription?

Yes, during the Project Pilot or Annual Subscription you are going to receive IT support and offshore wind expertise support following the onboarding procedure. Technical support based on IT functionalities is included throughout the duration of your contract.

a

Can I use Youwind for different countries?

Yes, you will be able to use Youwind on a global scale.

a

Can I use Youwind from different offices/locations?

Yes, you can use our IT platform from different locations, no need to have the same IP.

a

Do I have to download Youwind model on my computer?

No, it is a web-based IT platform consisting of different Apps that answer key questions relevant when developing an offshore wind project worldwide.

a

Do I need to purchase a course to start using Youwind?

No, the onboarding procedure is included in our subscription fees.

a

Does your IT platform have any specific IT requirements?

Our platform is constantly validated using Google Chrome.

a

How can I request a free demo meeting?

Click “Contact us; Request a Demo” on our website to leave your data and we will contact you as soon as possible.

a

How does the onboarding procedure work?

The onboarding procedure consists of dedicated onboarding sessions for a reduced group of users where we go through a real case that is chosen by the client, to go over all functionalities of the IT solution and discuss Q&A while users are trying to do it by themselves. Normally onboarding is successfully achieved after 1 to 3 sessions per group. Technical support based on IT functionalities is included throughout the duration of your contract.

a

How long does the Project Pilot last?

6 weeks.

a

I’m a student, can I use Youwind for my master thesis or PhD?

Yes, we do provide student licenses. We will have a preliminary interview with you to get to know the content of your work and how we can support you best.

a

What language is Youwind IT platform in?

English.

a

What types of subscriptions do you offer?

We offer Annual Subscriptions and Project Pilots for a specific project with a short-term duration.

FAQ Platform usage

Optiwindow · Pixel · Pixel Park · Youwind model

Platform usage · Optiwindow

A

Can we add specific weather data in Optiwindow?

Yes, it is possible to add specific weather data in our logistic planner such as wind speed at harbour and wind/wave data at the site through “Edit weather data” on the Activity Section of Optiwindow.

Platform usage · Pixel

a

Can you please explain how your pixels get the water depth in the area screening? Is it the water depth at the centroid (point) or the mean (zonal)?

The water depth of a pixel is at the centroid. Once you generate a layout, the water depth as each turbine position is used.

a

How are the Pixel/subareas defined when screening the area?

When screening your area with Pixel, you can set the wind farm density which is the power capacity (MW) divided by the area (km2) and with the power capacity, Pixel app will split the designated area into different small sub-areas called “pixels”.

a

How often are the library and geograhic data layers updated?

Every month.

a

Is it possible to download the Pixels and Park Layout design from your IT Platform?

Yes, you will be able to download GeoJSON files in the Area Screening (Pixel) and Park Layout Design (Pixel Park).

a

Is it possible to include additional geographic data layers for the Area screening?

Yes, there is the option to upload your own layers with additional environmental requirements or local constraints that you might have using “Upload more Geo Layers” functionality.

Platform usage · Pixel Park

a

Does Youwind take into account the footprint radius of the mooring system in your layout?

Yes, the layout generated using Pixel Park by Youwind takes the footprint radius into account so that the turbines and mooring lines are within the development area, which might be a need for consent/permit purposes.

a

Does Youwind take into account the footprint radius of the mooring system in your layout?

Yes, the layout generated using Pixel+ by Youwind takes the footprint radius into account so that the turbines and mooring lines are within the development area, which might be a need for consent/permit purposes.

a

If I upload a layout in Park Layout Design, does it get reflected in the Project Overview and Finance and in the Area Screening?

Yes, all the parameters are updated directly.

a

Which direction of the wind rose is used to optimize the layout? Is it the main wind direction or the mean of the wind direction?

When generating a layout, we use the complete wind direction probability distribution, and optimize the energy production for all wind directions (weighted by their respective probability).

Platform usage · Youwind model

a

Can I create new items?

Yes, you can create new items in our system.

a

How can I share my project with my colleagues?

Through the company profile, you can send an invite to your colleagues, and they will be able to join and work on your projects.

a

How many users can work at the same time in one project?

Many users can work on the same project, as long as you save your changes for the rest to see the updates live.

a

Is it possible to compare different projects and layouts?

Yes, you can do so using “Compare Projects” field at Youwind model and you will visualize the comparisons in the section “Project Overview and Finance”.

a

What are the parameters to consider when choosing a vessel?

In our Vessel library, you can find the main technical parameters for the vessels: leg length, deck area, and pricing. You need to make sure the bathymetry matches the leg length (including air gap) under “Maximum water depth” and that the vessel is equipped to transport units of the turbine MW selected, and that the hook height matches the hub height.

a

Who will have access to the new items created by me?

You can share all the information inside your company profile, and it is stored following high standards of confidentiality.

FAQ Platform calculations

Export cables · Foundations · Mooring lines · Offshore substation · Wake models

Platform calculations · Export cables

A

How is the length of the export cable calculated?

We assume an extra 5% for a single cable length of the distance from the onshore substation to the centre of the park. Considering the capacity of the export cable, then we multiply the single cable length for the number of needed cables depending on the park capacity.

Platform calculations · Foundations

A

Youwind calculated foundation weight does it include Transition Pieces?

Yes, Youwind calculated foundation weight includes the foundation and the transition pieces’ weight. Youwind also calculates the mooring length and cost depending on the bathymetry and type of floater.

Platform calculations · Mooring lines

a

How is the mooring line calculated using a catenary?

Mooring lines are made of chain or wire rope and follow a curve that is described mathematically as a “catenary” from the point where they connect to the turbine to the point where they land on the seabed due to their weight. Along the seabed before reaching their anchors, allowing the use of drag embedment anchors, which are typically more affordable than anchors designed for vertical forces. Because of their curved profile and need for length on the seabed, catenary moorings generally have the longest lines and the largest anchor spacings. Youwind calculates the length directly with the bathymetry but with different scaling categories:
• With bathymetry between 0-200m, the scaling is 4.5x water depth,
• With bathymetry between 2-600m, the scaling is 4x water depth,
• and with >600m the scaling is 3.5x water depth.
For example, if the bathymetry is 100m, then the length of one line is 450m and if you have 4 lines the total mooring line length is 1800m.

a

How is the mooring line calculated using a Taut?

Mooring lines are typically made of synthetic rope and have minimal contact with the seabed, relying on rope elasticity for their compliance, requiring anchors that can withstand both vertical and horizontal loads. In this analysis, we choose a 45° angle between the mooring line and the seabed to represent a minimal anchor spacing option for semisubmersible and spar platform types. Youwind calculates the Taut mooring line length with the bathymetry based on the assumption of 45° angle, as line length= √2* depth. For example, if the bathymetry is 100m the length of one line is 141m, and the total length of all the lines is 565m (4 units).

a

How is the mooring line calculated using a Tension leg type?

Tension Leg designs use high-tension mooring lines oriented vertically with anchors designed to withstand high vertical loads (e.g., suction pile anchors). The distance between anchors is approximately equal to the width of the floating platform, representing the minimum possible mooring footprint. These designs require a specific platform type with extra buoyancy. Youwind calculates the Tension leg mooring line length directly with the bathymetry. If the bathymetry is 100 the length of one line is 100 and if you have 4 lines, the total mooring line length is 400m.

a

How Youwind calculates the mooring lines?

When using the foundations’ categories: Spar Buoy, Semi-Sub Floating or Tensioned Leg Platform mooring lines are needed. After selecting the foundation category, you choose the mooring system: tension leg, taut and catenary included in our preset library. You will be able to choose the number of mooring tethering lines connected to the platform and seabed.

a

What is the footprint radius for different mooring system types?

For different mooring system types, the footprint radius is the following:
• With Tension leg it is 30 m (based on Design considerations for tension leg platform wind turbines – ScienceDirect)
• With Taut it is the same as water depth.
• With Catenary it is (sqrt (line lenght^2 – depth^2)) based on the conservative assumption of a completely straight-stretched line.

Platform calculations · Offshore substation

A

The offshore substation from the library can handle up to 800MW, so we would need 3 units for a 2,095MW wind farm. How does Youwind calculate the offshore substation cost?  

We currently have equal capacity for each offshore substation, rounded up to the next 100 MW. In this case, you would have 3 offshore substations of 700 MW.

Platform calculations · Wake models

A

How are TurbOPark and Jensen wake models verified?

For Turbopark, Ørsted has provided a comparison case on https://github.com/OrstedRD/TurbOPark/blob/main/TurbOParkExamples.pdf.
For the N.O. Jensen model (NOJ), we use the implementation of PyWake, for which a validation report is provided in here

FAQ Data sources

a

For some analysis I would like to compare with Global Wind Atlas wind data, can I use this data in Youwind model?

There is a method entering manual values but not as the effective wind speed but as the wind speed distribution with the Weibull function. Then, the wind speed will be an output of this distribution. The Global Wind Atlas wind speed has a 3km resolution, and you can get the Weibull Scale parameter A and Weibull shape factor k values by downloading their map. You can add A and k values in the wind resource section of Youwind Model and please make sure to empty the Mean Wind speed at 100m and 150m values. You can also upload your wind time series from GWA in the Wind Temporal Analysis section “Upload time-series file to Youwind”. We recommend however using the values in the platform that come from Vortex.

a

How extensive is your preset library? What is the source of it?

Our IT platform includes an extensive list of preset settings. Some sources include publicly available information as well as back-engineering data based on our extensive experience in offshore wind. The specific sources will be listed on our platform.

a

I’m a manufacturer, can I add my technical specifications to your platform so that the developers can use it?

We will be pleased to do so including the level of uncertainty you will be comfortable with; in case it is useful for our customer. Please contact us to evaluate each case.

a

What geographic data layers are included in Youwind IT platform?

We are continuously adding new layers: from designated areas for offshore wind energy by country to technical and environmental constraints, human activities, and other useful data for calculations, such as harbours and onshore electrical substations

a

Which bathymetry data are you using?

We have an API that provides GEBCO, General Bathymetric Chart of the Oceans, data in 450m resolution. Should the user have other sources of bathymetry from e.g. a geophysical campaign then these can be uploaded also with the turbine positions. Then all the foundation, cost and financial parameters update automatically if the user chooses so.

a

Which wind data are you using?

The wind data source is ERA5, 20 years average with a 1km resolution. If you indicate one coordinate the closest node within 1km is displayed. To get the exact datasets at a specific coordinate in a 100m resolution or a time series, a run from Vortex is needed that is integrated in Youwind model. The Vortex platform and Youwind is directly integrated so all the runs you have in Vortex in the proximity of your area are loaded into the Youwind project.

FAQ Wind energy

A

What is the Beitz Limit?

The power coefficient, Cp, is the relation between converted wind power and available power in the wind fluid flow. The maximum power coefficient, Betz’s law, is 59,26% which is the maximum available wind power that can be converted to mechanical power at ideal conditions.

FAQ Wind farm components

Turbine · Mooring lines

Wind Farm components · Turbine

a

What are the main degrees of freedom of a turbine?

It has three: the rotation of the rotor (azimuth), the rotation of the nacelle into the wind (yaw) and the rotation of the blades in their lengthwise axis (pitch).

a

What are the minimum and maximum rotation speed of a turbine?

At low speeds, there is not enough wind for the turbine to rotate. The wind speed when the turbine begins to rotate is the cut-in speed. The maximum wind speed where power can be produced safely is the cut-out speed, as with stronger winds the loads in the rotor will be too large. The cut-in and cut-out speeds depend on each turbine.

a

What are the most vulnerable components of a wind turbine?

The most vulnerable components of a wind turbine are: the gearbox (preventive maintenance by frequent oil changes); yawing brake system; damping elements and vibration sensors; blades that need to be constantly monitored and may require to be cleaned or exchanged after 5-10 years of operation; electronic control system; and bearings.

a

What is a Nacelle?

The Nacelle hosts the drivetrain (bearing, gearbox, brake, generator) and power electronics equipment (converters, transformers) in a turbine.

a

What is the rated power of a turbine?

The rated power is the power output limit that is fixed with the electric generator.

Wind Farm components · Mooring lines

A

What are the main types of mooring lines?

There are three main types: Tension leg, taut and catenary.

FAQ Wind project

a

What are the different stages of an offshore wind farm project?

The timeline of a wind energy farm has 4 main phases: The development phase where the right site is located, the wind farm is designed and the permits are obtained (up to 10 years), the Implementation phase (1-2 years), the Operation and Maintenance phase (20-25 years) and the Decommissioning/Repower phase (1year).

a

What are the main stakeholders of a wind energy farm?

The main stakeholders of a wind project are local citizens, politicians, utilities, universities, scientists and engineers, NGOs, financial institutions, fishing industries, military, consumer associations, the tourism sector, and cultural entities among others.

a

What aspects should be considered when planning for an offshore wind farm?

Several aspects must be considered when placing an offshore wind energy farm: wind resource, environmental impact such as marine habitats and avifauna with its migratory routes, water depth and seabed properties (bathymetry and soil), distance to land and to harbour, grid connection and available capacity, access and construction, land ownership, planning permissions, navigation routes, military zones, among others.  

a

What do we need to address in wind farm developments?

In wind farm developments we need to address the following aspects:
• Aerodynamics (blades and structures)
• Mechanics (machine elements, strength of materials, novel materials, testing)
• Electrical Engineering (electrical machines, grid connection/integration, load management)
• Electronics (controls and power electronics)
• Controls (control theory, hydraulics, pneumatics)
• Civil Engineering (foundations, roads, power lines)
• Transport Logistics; Design & Architecture
• Economics
• Project Planning & Management

a

What does ABEX stand for?

It stands for Abandonment and Decommissioning Expenditure and can be calculated as a percentage of CAPEX or the user can add their own budget also directly.

a

What does DEVEX stand for?

It stands for Development Expenditure. The development costs include overall development services during the environmental impact assessment and consenting process (engineering, wind resource assessment, surveys..).

a

What height of the wind is considered for offshore wind energy farm calculations?

The wind speed is considered at turbine hub height, 100m, 150m and 250m and the system extrapolates it using the wind law at the hub height of the selected turbine.

a

What is the lifetime of an offshore wind energy farm?

Up to 25 years.

a

What is the revenue of a wind energy farm?

The revenue of a wind energy farm depends on the energy production into the grid’s meter and the electricity price.

a

What losses and efficiencies should be considered in an offshore wind power plant?

The losses and efficiencies that Youwind model considers are: Wind turbine availability (%), Wake loss efficiency (%), Blade degradation (%), Array cable efficiency (%) and availability (%), Export cable efficiency (%) and availability (%), Balance of plant losses (%), Offshore substation efficiency (%) and availability (%), onshore substation efficiency (%), Capacity curtailment (%), Grid availability (%), and other minor losses (%)

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