(Press-News.org) WASHINGTON, July 20, 2021 -- In the wind power industry, optimization of yaw, the alignment of a wind turbine's angle relative to the horizonal plane, has long shown promise for mitigating wake effects that cause a downstream turbine to produce less power than its upstream partner. However, a critical missing puzzle piece in the application of this knowledge has recently been added -- how to automate the identification of which turbines are experiencing wake effects amid changing wind conditions.
In the Journal of Renewable and Sustainable Energy, by AIP Publishing, researchers from the University of Texas at Dallas describe a real-time method for potentially helping turbine farms realize additional power from the clustering of their turbines. Their method requires no new sensors to identify which turbines at any given time could increase power production if yaw control is applied, and validation studies showed an increase of 1%-3% in overall power gain.
"There was a huge gap in how to determine, automatically, which turbine is in the wake of another in the field with variable wind conditions," said co-author Stefano Leonardi. "This is what we solved. This is our contribution."
Wind farms consist of multiple turbines built close together, each converting kinetic energy into electricity. Optimizing power production from an individual turbine depends on many factors (e.g., stratification, temperature, turbulence, topography, etc.), but optimizing production of the farm as a whole also involves interactions between turbines. A downstream turbine in the wake of another encounters decreased wind, reducing turbine power production up to 60%.
The researchers identified how to create clusters or links between turbines by identifying correlations in data currently collected by turbine sensors. Wind farm owners can then use this automated information to guide employment of a standard procedure for yaw control, based on the past decade of studies about yaw optimization. Each 1% increase in energy production would represent 3 billion kilowatts per year.
"The exciting part about our work is that it matches reality, impacting real people," said co-author Federico Bernardoni. "Operators can use these results to identify when they should apply yaw control, and to which group, to maximize wind power gain."
Since the turbines already have the hardware and sensors, and the land is already committed to the wind farm, any increase in power production using this method would be truly green energy. The method is also unique because it is model-free. It makes no assumptions about current parameters or conditions, minimizing the effects of uncertainty present in current wake models.
"By just making turbines smarter, we're getting more energy from something that already exists," said Leonardi. "Using just simple math, we're increasing energy, so that's a very clean, green 1[%]-3%."
The article "Identification of wind turbine clusters for effective real time yaw control optimization" is authored by Stefano Leonardi, Federico Bernardoni, Umberto Ciri, and Mario Rote. The article will appear in Journal of Renewable and Sustainable Energy on July 20, 2021 (DOI: 10.1063/5.0036640). After that date, it can be accessed at https://aip.scitation.org/doi/10.1063/5.0036640.
ABOUT THE JOURNAL
Journal of Renewable and Sustainable Energy is an interdisciplinary journal that publishes across all areas of renewable and sustainable energy relevant to the physical science and engineering communities. Topics covered include solar, wind, biofuels and more, as well as renewable energy integration, energy meteorology and climatology, and renewable resourcing and forecasting. See https://aip.scitation.org/journal/rse.
WASHINGTON, July 20, 2021 -- Surpassing the biological limitations of the brain and using one's mind to interact with and control external electronic devices may sound like the distant cyborg future, but it could come sooner than we think.
Researchers from Imperial College London conducted a review of modern commercial brain-computer interface (BCI) devices, and they discuss the primary technological limitations and humanitarian concerns of these devices in APL Bioengineering, from AIP Publishing.
The most promising method to achieve real-world BCI applications is through electroencephalography (EEG), a method ...
Millions of people in countries around the world could face an increased risk of malnutrition as climate change threatens their local fisheries.
New projections examining more than 800 fish species in more than 157 countries have revealed how two major, and growing, pressures - climate change and over-fishing - could impact the availability of vital micronutrients from our oceans.
As well as omega-3 fatty acids, fish are an important source of iron, zinc, calcium, and vitamin A. A lack of these vital micronutrients is linked to conditions such as maternal mortality, stunted growth, and pre-eclampsia.
Analyses by an international team from the UK and Canada and led by scientists from Lancaster ...
PHILADELPHIA -- (July 20, 2021) -- Alternative polyadenylation (APA) is an RNA processing mechanism that regulates gene expression by generating different ends on RNA transcripts of the same gene. Though it affects more than half of human genes, the significance of APA was poorly understood. Now a new study by The Wistar Institute describes an important function of APA in allowing certain mRNAs to reach specific sites of protein synthesis and reveals that length, sequence and structural properties can determine the destination (and fate) of mRNAs within the cell. These findings, published online in the journal Cell Reports, shed light on the consequences of APA that may represent a paradigm shift in the mRNA metabolism field.
What The Study Did: Credit reports were analyzed to estimate the amount of medical debt in collections nationally and by geographic region and income group and its association with Medicaid expansion under the Affordable Care Act.
Authors: Neale Mahoney, Ph.D., of Stanford University in Stanford, California, is the corresponding author.
To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/
Editor's Note: The article includes funding/support disclosures. Please see the article for additional ...
New Rochelle, NY, July 19, 2021--Duct tape and items retrieved from the water are common pieces of evidence in forensic cases. A new study evaluates the recovery of DNA from folded duct tape that has been submerged in ocean water for up to 2 weeks. The study is published in the peer-reviewed journal Forensic Genomics. Click here to read the article now.
Joseph Donfack, PhD, from the Federal Bureau of Investigation (FBI) Laboratory Division, and coauthors showed that it is possible to recover enough DNA to yield a complete short tandem repeat (STR) profile from folded duct tape that has been submerged in ocean water for up to 2 weeks if the initial ...
On 23 July 2012, humanity escaped technological and economic disaster. A diffuse cloud of magnetized plasma in the shape of a slinky toy tens of thousands of kilometers across was hurled from the Sun at a speed of hundreds of kilometers per second.
This coronal mass ejection (CME) just missed the Earth because its origin on the Sun was facing away from our planet at the time. Had it hit the Earth, satellites might have been disabled, power grids around the globe knocked out, GPS systems, self-driving cars, and electronics jammed, and railway tracks ...
Retail traders often fear that reducing the amount of urban space made available for parking private vehicles would have a negative effect on their businesses. A survey conducted by researchers from the Institute for Advanced Sustainability Studies (IASS) on two shopping streets in Berlin shows that traders have a skewed perception of their customers' mobility habits. The findings of this research will facilitate better-informed decision-making around urban land-use planning.
The researchers surveyed around 2,000 customers and 145 retailers on Kottbusser Damm (Friedrichshain-Kreuzberg district) and Hermannstraße (Neukölln district). The vast majority of shoppers - 93 per cent - had not travelled to their ...
No benefit of high-flow therapy (HFT) can be derived from the available study data for patients with advanced chronic obstructive pulmonary disease (COPD) or chronic type 1 respiratory failure. It therefore remains unclear whether this form of treatment has advantages over long-term oxygen therapy (LTOT) or non-invasive ventilation (NIV).
This is the conclusion of the benefit assessment that the Institute for Quality and Efficiency in Health Care (IQWiG) has now completed. The Federal Joint Committee (G-BA) had commissioned IQWiG to investigate the advantages and disadvantages of HFT in patients with stable, advanced COPD or chronic respiratory failure with oxygen deficiency ...
These motions were measured by analyzing 10 years of observations from NASA's Solar Dynamics Observatory (SDO). Using computer models, the scientists have shown that the newly discovered oscillations are resonant modes and owe their existence to the Sun's differential rotation. The oscillations will help establish novel ways to probe the Sun's interior and obtain information about our star's inner structure and dynamics. The scientists describe their findings in today's issue of the journal Astronomy & Astrophysics.
In the 1960s the Sun'ss high musical notes were discovered: The Sun rings like a bell. ...
New findings from zoologists working with birds in Southeast Asia are shining fresh light on the connections between animal behaviour, geology, and evolution - underlining that species can diversify surprisingly quickly under certain conditions.
The zoologists, from Trinity College Dublin's School of Natural Sciences, sequenced DNA and took measurements and song recordings from Sulawesi Babblers (Pellorneum celebense), shy birds that live in the undergrowth on Indonesian islands.
Although these islands were connected by land bridges just tens of thousands of years ago, and although the babblers look ...