Category: Industry News

Wind Turbine Power Calculations

By marty-anemoi,

wind turbine costs

A wind turbine consists of a few essential components that convert the wind’s kinetic energy into electrical energy. To determine how much energy will be available for conversion, one has to take factors such as the wind speed and the swept area of the turbine into account. Any wind farm project requires planning to establish how much power and energy output can be expected of each turbine to determine whether the project will be economically viable. 

How to calculate expected wind energy 

  1. It is crucial to know how much energy a wind turbine can produce in different conditions. To do this, one can calculate the rotational power produced at rated wind speed in a wind turbine. Rated wind speed is the minimum wind speed required for a wind turbine to produce power. 
  2. The Betz Limit or Betz Law theory concludes that a wind turbine cannot convert more than 16/27, or 59.3%, of the wind’s kinetic energy into mechanical energy by turning a rotor. This theory establishes that the maximum power efficiency, or power coefficient, of any wind turbine design is 0.59.
  3. The power coefficient of each turbine type is unique and will be unique in the wind speed the turbine is operating in. 
  4. The true maximum power efficiency is usually lower than the Betz Limit at 0.35-0.45, even in premium wind turbines. 
  5. Once other factors of the wind turbine system, such as the gearbox, bearings, and generator, are taken into account, only about 10-30% of the wind power is converted into electrical energy. 

Although turbine designers usually define expected wind turbine power, there is a relationship between various factors that affect wind speed power more than the rated wind speed. To understand any income that might be lost by the down-time of the turbine, it is vital to know turbine behavior at different wind speeds. Understanding these factors will also help with noticing any problems with the turbine when it is producing lower energy values than expected. 

If you would like to talk to one of our experts for more information about our wind turbine services, get in touch with our team at ANEMOI today. 

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Global Wind Energy Fact Sheet

By marty-anemoi,

Wind energy

There are almost 60 000 utility-scale wind turbines installed in the U.S, with a cumulative wind energy capacity of 107.4 GW. These statistics suggest that there was an increased wind capacity of 166% in the U.S from 2010 until 2020. As renewable energy becomes increasingly popular, here is an overview of global wind energy. 

Global wind farm facts 

  • From 2009 to 2019, the global wind capacity increased on average by 15% annually. 
  • The overall capacity of globally installed wind turbines reached 650,8 GW by the end of 2019. 
  • 2019 was the second-strongest wind year in terms of market size, yielding a growth rate of 10,1%. 
  • All wind turbines that were installed by the end of 2019 can meet more than 6% of the global electricity demand.
  • When it comes to total installed wind capacity in the U.S., the leading states are Texas (29,407 MW), Iowa (10,644), and Oklahoma (8,173 MW).
  • The average turbine size increased in the U.S. by 5% from 2017 to 2018.
  • During the same period, new wind energy purchase contracts averaged 1.3-1.8c per kWh. in 2019, the average residential electricity price was 13.0c per kWh.

Wind energy performance and impacts on the environment 

  • U.S. wind capacity avoided millions of metric tons of carbon dioxide emissions and used approximately 103 billion gallons less water than conventional power plants in 2019. 
  • Studies have found that if wind-generated electricity in the U.S. reaches a capacity of 35% by 2050, the greenhouse gas emissions from the electric sector would be reduced by 23%.
  • Although noise factors are often cited as a challenge for wind farms, the typical noise from a wind project is between 35-45 dB from a distance of 350m. Studies have shown that a quiet bedroom measures 35 dB.

If you would like more information about our national wind turbine services for your wind energy project, get in touch with our ANEMOI experts today. 

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Wind Energy Advantages And Challenges

By marty-anemoi,

wind energy

Wind energy remains one of the fastest-growing energy sources globally due to the many advantages this form of renewable energy offers. However, certain challenges are keeping wind energy from being used on a greater scale. Here are some of the main benefits of wind energy and the challenges that need to be addressed to grow the industry. 

Wind power advantages 

  • Cost-effective

Land-based wind power remains one of the lowest-priced energy sources. It only costs a mere 1-2 cents per kWh after production tax credit. 

  • Clean fuel source

Wind power doesn’t produce atmospheric emissions and doesn’t pollute the air, as it doesn’t require fossil fuels.

  • Employment opportunities

The U.S. wind sector employs more than 100 000 workers. Wind turbine technicians are sought-after, and it is becoming one of the fastest-growing positions in the U.S. The Wind Vision Report estimates that wind energy could potentially support in excess of 600 000 jobs in the sectors of maintenance, manufacturing, installation, and supporting services by 2050.

  • Sustainability

When the sun heats the atmosphere, the Earth rotates, and the wind blows over surface irregularities on the planet. This means that as long as there is sunshine, the wind will blow, and wind energy can be harnessed.

  • Wind turbines can be built in rural areas

Rural economies greatly benefit from wind farms, as the wide open spaces provide optimal wind sites. These wind farms typically do not cause inconvenience to those working on the land, and landowners receive rent from wind power plant owners for the use of the land. 

Wind power challenges 

  • Wind energy has to compete with the costs of traditional generation sources

While there have been great strides over the past few decades in decreasing wind energy costs, these projects still need to compete to be economically viable against lower-priced electricity.

  • Maintenance costs

The costs of operations and maintenance (O&M) at wind farms in the U.S.  ranged between $42 000 – $48 000 per MW in 2016. These costs can vary widely from projections, highlighting the importance of preventative maintenance to keep wind farms in optimum working conditions to keep O&M costs as low as possible. 

  • Wind sites are often rural

Land-based wind project sites are often located far from cities where electricity demand is high. This means that transmission lines typically need to be built.

  • Noise and visual concerns

While wind projects have far less of an environmental impact than traditional power plants, there are concerns over the towers’ aesthetic effect on landscapes and noise produced by the long turbine blades.

  • Use of land

Land-based projects often need to compete with projects that could deliver more revenue than electricity generation.

If you would like to improve your O&M costs with our expert wind energy services, contact our professional team at ANEMOI today. 

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Assessing The Viability Of Residential Wind Farms

By marty-anemoi,

wind farms

Renewable energy is becoming increasingly popular, and many individuals are considering their own residential wind farms to go off-grid. A residential wind farm can reduce your energy bills and increase the value of your home. However, it should be noted that residential wind systems are typically accompanied by more challenges than residential solar systems. From a practical side, solar systems work better in densely populated areas and take up less space. If you are convinced that a residential wind system might work for your needs, continue reading below.

Will a home wind turbine system work for me?

While a residential turbine system has its advantages, there are several factors to consider, and it will require some planning.

  • A good starting point will be to establish whether small wind electric systems are allowed in your area. One of the main challenges of residential systems can be complaints from the rest of the neighborhood. These turbine towers are typically tall structures of about 80 to 100 feet high to get sufficient turbulence. For this reason, these systems are predominantly found in rural or farmland areas where there is space between properties.
  •  Residential wind turbines are much smaller than popular industrial models. However, turbines require a minimum wind speed of 9-10mph, so be sure to establish whether your area will be able to meet these requirements. 
  • The Department of Energy has helpful information on residential renewable energy systems and stipulates the necessary regulations you will need to be aware of. You should also enquire about possible Federal tax breaks or refunds that might be available to homeowners who convert to renewable energy.   

Determining costs 

You should get different quotations from different companies for turbine prices and installation. You should take the following costs into account when doing your calculations to determine whether a residential wind farm will be economically viable for you:

  1.   Cost of a pole-mounted residential wind turbine
  2.   Cost of the turbine pole with guy-wires
  3.   Cost of concrete needed to secure the tower
  4.   If a Federal Energy Tax credit applies to you, do factor that in to decrease your costs
  5.   Research your local average annual wind speed.
  6.   Determine how much kWh your turbine will generate per day in your area’s average wind zone to establish whether the costs associated with your residential system will be economically viable. 

While residential wind farms might be viable to some consumers under the right conditions, solar energy systems are currently a better option. 

If you require any commercial wind turbine services or information for your commercial wind farm project, contact our team of experts at ANEMOI today.

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How Do Wind Turbines Work?

By marty-anemoi,

Wind turbine

Wind power has been used for thousands of years. From using windmills to crush grain or pump water, civilizations have seen the benefits offered by the wind. But how exactly are modern wind turbines being used to create renewable energy?  

What do wind turbines do? 

Wind turbines are tall machines (about the same height as the Statue of Liberty) designed and built to convert the wind’s kinetic energy into mechanical power to generate electricity. 

How do wind turbines create renewable energy? 

  • The rotor blades on a turbine need to turn – but how exactly does this happen? The design of these blades resembles aircraft wings, which generate aerodynamic torque from the wind. This occurs because air flows across the blades and decreases the air pressure on one side of the blade. 
  • With this difference in air pressure, both sides of the blade lift and drag. However, the lift force is stronger than the drag force, resulting in the rotor blade spinning. 
  • Large modern wind turbines usually have the capacity for rotor blades to swivel to allow them to find the optimal pitch angle to harvest this energy. 
  • The rotor blades connect to the nacelle, which is located behind the blades and contains a gearbox and a generator to convert the kinetic energy into electrical power. The gearbox will translate the blade rotation speed from a low-speed shaft to a high-speed shaft into the generator. 
  • Once it has passed through the generator, the electrical energy travels through a cable that runs to the bottom of the inside of the tower. 
  • This is when a transformer will convert the electrical energy to a much higher voltage to be transmitted to the power grid. 

Should you require more information about our wind turbine services, get in touch with our team of countrywide experts at ANEMOI today. 

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Wind Turbine Terminology And Components

By marty-anemoi,

Wind turbine

An increase in demand for renewable energy and electricity required worldwide is driving the growth in the wind turbine component market. While wind turbines may seem minimalistic to the average eye, they consist of various components that allow them to transform the wind’s kinetic energy into mechanical power to ultimately generate electricity. 

Wind turbine components

Modern wind turbines come in different sizes, but they generally consist of these main components: 

Rotor blades

Rotor blades generate aerodynamic torque from the wind and resemble aircraft wings. One side is flat, while the other side is curved to allow wind to flow quicker over the blade edge to create a difference in pressure on both sides of the blade. To equalize this pressure difference, the air effectively pushes the blades and causes them to turn.


The nacelle consists of the drivetrain that converts the aerodynamic torque into electrical power. It contains a set of gears that translate the blade rotation speed from a low-speed shaft to a high-speed shaft that goes into a generator in the nacelle. The generator is connected to the converter, which can convert the speed from the generator to grid-frequency. This is then transformed into the grid. 


The tower holds the nacelle and rotor blades off the ground at a height to garner ideal wind speed. Towers are typically constructed approximately 50 to 100 meters above ground or water surface. Offshore tower foundations are generally secured to the bottom of the body of water, but research is being done to develop towers that can float on the water surface. The tower also provides access to the nacelle for maintenance.

If you require information on wind turbine components or our wind farm services, get in touch with ANEMOI today. 

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A Day In The Life Of A Wind Turbine Engineer

By marty-anemoi,

Wind turbine engineer

Renewable energy is growing at such a rapid pace that the American Wind Energy Association (AWEA) says that wind energy was responsible for 39% of the energy capacity in the US in 2018. Wind Turbine Engineer Technicians are becoming sought-after with a growing wind energy sector, and the occupation shows promising growth and wage numbers.  

What does a Wind Turbine Engineer Technician do? 

Broadcast Media Services followed a day in the life of Wind Turbine Engineer Stephen Fisher, who was working on the London Array – one of the world’s largest offshore wind farms. Fisher explains that his work typically involves climbing the turbine, where he then takes off filters and puts fresh oil in certain parts. Work will often include having to crawl underneath tight spaces or even climbing into the blade to change the grease inside the blade. 

A typical day at work for a Wind Turbine Engineer 

  • Most shifts are 12-hours long.
  • The day usually starts by clocking-in and getting the necessary paperwork and tools from the O&M Centre that the team will need to conduct their work for the day.
  • Paperwork is an essential part of starting the day, as it is used to stipulate isolations for when work is being done on certain parts of the turbine to make it safe for everyone working on the turbine.
  • Next, the team heads to the warehouse to get their kit-bags, which will include a climbing harness and an immersion suit for offshore work. (Lunch is also taken along, as there are no lunch options once you are on the turbine).
  • The team is transported to the turbine, and they climb to the first part of the turbine. Once at the top of the turbine, you get to enjoy the views from an approximate height of 100 meters (sometimes you will even work above the clouds). 
  • Once the work for the day is concluded, the team clock-out. 

What do those in the Wind Engineering industry say? 

Those in the industry believe it’s one of the best careers to follow. Renewable energy will continue to grow, and once you get into the industry, you’ll have a lifetime career. You get paid to climb turbines and enjoy some unbelievable views – not something everyone gets to do at work.  

If you would like more information about the services our team of expert wind turbine engineers offer, get in touch with ANEMOI today. 

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Wind Farms In The US

By marty-anemoi,

US wind farm


The United States has seen a drastic increase in the installation of wind farms over the last decade due to greater interest in investing in renewable energy. The US Geological Survey (USGS) estimates that an average of 3000 wind turbines has been built annually in the US since 2005. The US Wind Turbine Database contained more than 58 000 wind turbines in 2019, all of which were constructed after 1980. Today, there are approximately 1500 wind energy projects that span at least 43 states in the US. As technology continues to evolve, so too do wind power projects.

Largest wind energy projects in the US  

Texas remains the US’s state industry leader, with an installed capacity of 24 899MW as of April 2019. In California’s Mojave desert, the Alta Wind Energy Center is the largest wind energy project in the US today in terms of installed capacity, with an approximate capacity of 946MW. With an installed capacity in excess of 96GW, the US is the second-largest producer of wind power in the world, hosting six of the top ten global onshore wind farms.

Country-wide wind energy projects ANEMOI has worked on


Shepherds Flat (Oregon)

This is the first wind farm to utilize GE2.5XL technology, and ANEMOI was afforded the opportunity to be the first company to complete a gearbox oil conversion on the turbines at the 845MW wind farm. ANEMOI met Amsoil’s strict standards, and our experts have mastered the process.

Panther Creek (Texas)

Three ANEMOI teams were deployed to work six-days-a-week for two months to perform the pitch battery replacements on 305 turbines. Each crew performed an average of two towers per day and finalized the work under-budget and four weeks ahead of schedule.

Mehoopany (Pennsylvania)

Tucked deep in the Appalachian Mountains, logistics and transport proved to be challenging when ANEMOI was called upon to perform annual maintenance at all of the site’s wind turbines within three weeks. Our five crews with three technicians per team completed the project on time and provided valuable feedback on such focused maintenance feasibility.

Balko (Oklahoma)

One ANEMOI crew of three technicians performed 162 Pitch & Yaw oil changes three weeks ahead of schedule, finalizing work in just over seven weeks. The site was so impressed that they requested ANEMOI to perform additional site maintenance for eight extra weeks.  

Rail Splitter (Illinois)

ANEMOI performed 67 gearbox oil conversions from Castrol A320-X320 and was the first company to perform this conversion to X320. ANEMOI was instrumental in developing the procedure, working closely with GE and Castrol to ensure the best overall results.

Sweetwater (Texas)

ANEMOI was called in to perform the first round of maintenance on the 170 turbines at the farm. The ANEMOI team worked for several months to perform maintenance on the turbines and performed hefty cleaning to bring the turbines back up to GE’s stringent operational standards. 

If you would like to discuss your energy needs for your wind farm, get in touch with our countrywide experts at ANEMOI today.

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Expertise In Onshore Wind Power Generation

By marty-anemoi,

Onshore wind power expertise

The United States is home to more than 100 gigawatts of wind energy capacity, and this sector of renewable energy will continue to grow due to the sustainable results produced by wind farms. However, finding a reputable company to partner with to look after all of your service and maintenance needs can be a daunting task. ANEMOI provides a highly-trained workforce and a cutting-edge fleet throughout the country for reliable response when you need us most. 

Why choose us for your wind turbine services and maintenance needs? 

  • All ANEMOI Operation Managers are becoming Safety Trained Supervisors (STS) through the board of certified safety professionals (BCSP).
  • All ANEMOI Field Operation Leaders are working towards OSHA 510, and all will be certified by the end of 2020.
  • ANEMOI has had no lost-time accidents and no OSHA recordables for six years.

Our expertise in onshore wind power generation 

Wind turbine blades

Wind turbine blades are the most critical components for efficient wind turbines, and damage caused by erosion, lightning strikes, and expected degradation can negatively impact a wind turbine’s power curve. Our composite repair specialists work with wind farm owners and OEMs to deliver project certainty for blade composite inspection and repair needs. Our combined team comprises seasoned blade technicians for up-tower or on-the-ground project repair needs.

Gearbox oil changes

We have the necessary experience, equipment, and capability to perform any gearbox oil change and conversion needs. Whether you are performing a straight-change with the same oil type or switching oil types, ANEMOI is your trusted wind turbine maintenance and service provider. 

Scheduled maintenance

When we work with clients, we ensure that the maintenance checklist provides all the essential information about safe maintenance, cleaning, inspections, testing, and replacement tasks for the proper operation of generators and associated equipment. We offer technical expertise from start to finish for a wind turbine site’s planned maintenance project.

Manpower augmentation

Given the complexity that accompanies a wind energy project’s maintenance and troubleshooting schedules, wind sites can be hit with the need for temporary workforce augmentation. Recognizing the challenges that may arise in these situations, we provide short- and long-term skilled and qualified staff to meet any project’s needs.  


Whether you need to correct a serial defect or want to perform an upgrade for efficiencies, we have the skills, tooling, and knowledge to complete your retrofit fully. 

If you would like to find out more about our onshore wind power expertise, get in touch with ANEMOI today.

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Services For Onshore Wind Energy Assets

By marty-anemoi,

Onshore wind energy services

Given the complexity of schedules at onshore wind energy projects, regular services are necessary for wind farms to function optimally. Wind farm owners and operators have to plan asset and project schedules according to maintenance cycles, everyday troubleshooting, fleet-wide retrofits, and manpower augmentation – while always keeping maintenance costs top of mind. ANEMOI offers a range of reputable and convenient services for onshore energy assets.

Manpower augmentation for your onshore renewable energy projects 

We provide both short- and long-term skilled and qualified staff to meet the needs of any project. Our workforce augmentation provides immediate skilled and qualified technicians without delays in hiring and training personnel.

Our services include:

  • Laydown yard support
  • Shipping and receiving support
  • Construction support
  • Scheduled or unscheduled maintenance
  • Inspections
  • Retrofits

Gearbox oil changes 

We have the experience, equipment, and capability to perform any gearbox oil change and conversion needs. Whether you are performing a straight change with the same oil type or switching oil types, ANEMOI is your trusted wind turbine maintenance and service provider. We do not just change your gearbox oil –  we inspect, observe, understand, and report any anomalies we might find during your oil change. Our gearbox oil changes consist of the following features:

  • Completely enclosed and self-contained unit to work in most environments without external power source needs.
  • Temperature controlled tanks to optimize oil flow in any climate.
  • Four segregated oil tanks for: waste oil, flush oil (heated), rinse oil (heated), new product oil (heated and filtered).
  • New product oil is filtered to ISO 4406 standard.
  • Staff certified to perform warranty repairs on gearbox OEM equipment.


Many owners and operators decide to retrofit their turbines with new parts to ensure better reliability of the replaced parts and increased productivity while also reducing future running costs. Parts typically have a lifespan, and owners and operators find that they can retrofit and replace some exhausted end-of-life components to keep their assets online and extend their productivity for longer than the usual 20 years.

Scheduled maintenance 

As a leading service provider for the top OEM’s, our technicians receive the latest comprehensive training on OEM equipment. ANEMOI always ensures that a client receives a maintenance checklist that provides all the essential information for safe maintenance, cleaning, inspections, testing, and replacement tasks necessary for the proper operation of generators and associated equipment.

If you would like to find out how we can assist with your onshore wind energy services, get in touch with our qualified team at ANEMOI today. 

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