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Issue 23

 June 2013

Howdy!

 

Welcome to the June 2013 issue of News Briefs, the Texas A&M Energy Institute's e-newsletter. News Briefs is intended to keep you informed about all the good things going on in energy research at EI and Texas A&M University as well as state, national and international energy-related news that affects all of us.

 

Also, please note our new address as the Energy Institute has moved! We are now located in the Texas A&M Institute for Preclinical Studies (TIPS) Building, 800 Raymond Stotzer Parkway, Suite 2020, College Station, TX. Come by and see us!

 

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If you have any questions, comments or ideas for future issues, please contact
Lisa Groce at 979.458.1644 or
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Thank you,

 

John A. Pappas

Interim Director, EI

In This Issue
2013-2014 Energy Institute Fellows Announced
The GoWind Team - The University of Texas at Austin Research Team
How to Put a Wind Turbine in the Texas Gulf
Governor Perry Signs Landmark Water Legislation
Focus on the Fellows

2013-2014 Energy Institute Fellows Announced

The Energy Institute received funding for the second year in a row from ConocoPhillips to provide graduate fellowships in recognition of outstanding research in energy.  This year, over 60 graduate students from the College Station and Galveston campuses sent in application packets.  After careful review, eight students were chosen to receive $5,000 each in support of their research projects.

 

This year's Energy Institute Fellows include: 

  • Ghassan Akrouch, Department of Civil Engineering
  • Pallab Barai, Department of Mechanical Engineering
  • Robert Ehrmann, Department of Aerospace Engineering
  • Adolfo Escobedo-Pinto, Department of Industrial & Systems Engineering
  • Naeem Farokhnia, Department of Electrical & Computer Engineering
  • Duminda Gunawardena, Department of Biological & Agricultural Engineering
  • Mohamed Noureldin, Department of Chemical Engineering
  • Dehan Zhu, Department of Geology & Geophysics

The broad objectives of the fellowships are to reward excellence in energy research, promote future research that is important to our energy future, and encourage students to pursue careers in energy.

 

Congratulations 2013-2014 EI Fellows!!

 

platform
Figure 1:  Platforms in East Cameron after Hurricane Rita in 2005 (Energy 2007).

The GoWind Team - The University of Texas at Austin Research Team

In December 2012, the U.S. Department of Energy announced investments in seven offshore wind projects including the GoWind project which will be led by the Texas A&M Energy Institute's Wind Energy Center. GoWind includes multiple university and industry partners. This is the third installment in a series about those partners and how their unique technologies, knowledge and abilities will contribute to the ultimate success of the GoWind project.

 

The University of Texas at Austin (UT) Cockrell School of Engineering (CSE) and Center for Electromechanics (CEM) will partner with Texas A&M on the GoWind Team. UT's participation will leverage expertise in the areas of geotechnical engineering and structural dynamics. These two areas of research are highlighted below:

 

Leveraging 70 Years of Offshore Structures Experience

 

The U.S. has been designing, building and operating offshore structures for oil production in the Gulf of Mexico since the 1940's. Since that time, The University of Texas at Austin has played a strong role in the development of this technology through research, education and consulting.

 

Five major hurricanes, from Ivan in 2004 to Ike in 2008, yielded unprecedented experience. These storms loaded thousands of oil rig structures well beyond their original design capacity. One silver lining of these storms was the information captured about offshore structure performance. For example: Why did the platform on the left in Figure 1 survive Hurricane Rita while the platform on the right did not?

 

UT has been studying the performance of offshore platforms in hurricanes to develop more efficient designs in the future.

 

Figure 2 shows an example set of results for a platform analysis. During Hurricane Ike, the foundation for this platform was loaded beyond design capacity, but survived the hurricane. The black envelope in Figure 2 represents the predicted capacity of the foundation - the threshold of loads from the hurricane (base shears and bending moments) that would theoretically cause the foundation system to fail. The red point represents the load from Hurricane Ike determined through a hind cast analysis of waves, winds and currents. The orange envelope represents an updated assessment of the foundation capacity based on data observed during Hurricane Ike. This result shows an implicit or inadvertent conservative design practice for this particular structure. By analyzing structures that have survived and failed, we are establishing their real capacity in comparison to their theoretical capacity.

 

graph
Figure 2:  Comparison of Predicted Foundation Capacity with Hurricane Load (Chen and Gilbert 2013).

 

Leveraging 40 Years of Structural Dynamic Modeling Experience

 

UT has a research team recognized for expertise in advanced energy storage and power generation rotating machines for both intermittent and continuous duty applications. The research program combines simulation, design, and fabrication of advanced electro-mechanical and electro-magnetic systems. During this analysis, the researchers employ multiple commercial finite element modeling and analysis packages, or develop custom FEA codes for additional analytical capabilities beyond commercial software packages. These software tools are multi-disciplined and multi-physics, allowing for 2D and 3D linear and nonlinear analysis of mechanical, fluid, thermal and electromagnetic systems in any combination.

 

UT simulation capabilities are supported by the Texas Advanced Computing Center (TACC). The TACC houses some of the fastest and most advanced computing systems in the world. This combined capability provides a considerable advantage considering the multi-faceted simulation tasks necessary to develop a truly optimized wind turbine for an off-shore environment.

 

An example of UT's expertise with rotating machinery was the diagnosing, modeling and resolution of a rare and serious vibration problem with the Navy's carrier-based EMALS generator (a 25,000 lb rotor). Figure 3 shows a sample plot of divergent vibration gradually building for 30 minutes, and leading to emergency shutdown. This problem had the entire EMALS program in jeopardy. CEM assisted the Navy in resolving this issue, and the EMALS generator is now in deployment on the USS Gerald Ford.

 

divergent vibration
Figure 3:  Divergent Vibration on the Navy's 4200 rpm EMALS generator.

Historically, many of the most famous and expensive rotating machinery dynamics problems have been with equipment operating on offshore platforms. UT researchers are well versed in all aspects of rotating machinery dynamics, and the effects they can have on structures such as offshore platforms.

 

On the GoWind team, UT's experience in structural dynamics will be leveraged

toward condition monitoring of the offshore platforms. In this role, the researchers will develop an offshore structure simulation model and exercise this model with cyclic loads induced by winds, waves, and turbine components on the platform. These loads will be evaluated under normal and abnormal operating conditions caused by hurricanes.

 

The models will assist in identifying critical points on the structure, and to establish a baseline response of the structure. Once the structure is operational, vibration transducers are placed at the critical points to be monitored.  Once this data is correlated based on environmental conditions, the simulation model of the structure can be used to observe any drift of the structure performance to predicted behavior, with the objective of predicting potential problems and direct maintenance activities. This tool along with the data collected on the platforms will also serve to build better offshore structures with minimal maintenance and down time, thereby lowering the cost of energy.

 

UT will apply lessons learned in the structural performance of offshore rigs and high loads on machinery to optimize the design of offshore wind turbines. The benefit of alternative sources of energy, such as offshore wind, can only be realized with efficient designs. The GoWind project provides a valuable opportunity to take offshore wind from theory to reality.

 

References

Chen, J. Y. and Gilbert, R. B. (2013)," Insights into the Performance Reliability of Offshore Piles based on Experience in Hurricanes," Principles and Practices in Geotechnical. Engineering - A Geotechnical Special Publication Honoring Roy Olson, American Society of Civil Engineers, Reston, Virginia, in press.

 

Energo (2007), "Assessment of Fixed Offshore Platform Performance in Hurricanes Katrina and Rita," Final Report for MMS Project 578, Minerals Management Service, U.S. Dept. of Interior, Herndon, Virginia.

 

How to Put a Wind Turbine in the Texas Gulf

State Impact

June 17, 2013 | 11:02 AM

By Michael Marks

 

Texas leads the nation in wind energy, but all of that is on land. Now several groups are looking out to the Gulf of Mexico for more wind energy potential.

 

Heather Otten, the Chief Development Officer for Baryonyx Corporation, manages the day to day operations of one such company. As StateImpact Texas previously reported, Baryonyx is part of a group called the GoWind Project, whose plan is to bring offshore wind farms to the Texas coast by 2016.

 

The GoWind Project is competing with seven other offshore wind operations for money from the Department of Energy, which will choose three of the projects for full funding next Spring.

 

Otten recently spoke to StateImpact Texas about the progress of the GoWind Project, offshore wind's main challenges, and dinosaurs.

 

Q: Why don't we have wind turbines in the Gulf of Mexico yet?

 

A: I think the simple answer to that is economics. Offshore wind projects are more expensive than onshore. There's no limit in Texas really for onshore wind, and then we have, as you know, the natural gas, the fracking and everything, so with natural gas prices so low, power prices are low. So it really is purely economics.

 

Q: So what's changed in that equation so that now Baryonyx is getting closer to putting a turbine in the water?

 

A: Actually not a lot. But you look at the long term volatility, and you assume that gas prices are not going to stay this low. But the beauty of wind power is it's a fixed cost. You don't have fuel costs, it's up front cost. [Wind power] is a good backup.

 

Q: Then how long will it be until we have offshore wind in the Gulf?

 

A: The hope is to have in by the end of 2016 into 2017. As far as the commercial-scale build out, that will hopefully follow right along that.

 

Q: Are you concerned at all about hurricanes?

 

A: We're not particularly concerned about hurricanes because we're doing all the proper study and research. The foundations are built with an air gap ... above the highest wave. I'm not an engineer, but there's a formula there. It's similar technology to what all the offshore oil rigs use. We're using a similar foundation, it's basically what they call a jacket design. You have 4,000 oil rigs off the Gulf of Mexico [with a jacket design], we're using what they know and improving on it.

 

Q: A lot of people are concerned with whether or not offshore wind will change the way the coast looks. Have you heard from the public at all in reference to those issues?

 

A: We have. There's concern. Folks are concerned that it's going to ruin their viewshed on South Padre Island. But we are 5 to 10 miles offshore, so the visibility is not going to be huge. It's interesting, just this past week I was out in the [United Kingdom] and I went and visited a project that is the same size [as Baryonyx's turbines], and the same distance offshore, and you could barely see them. You wouldn't see them unless you were looking for them. And I was quite surprised by that actually.

 

To read the rest of the interview with Heather Otten, click here.

Renewable Energy and Advanced Power Electronics Research Laboratory Wins Best Poster Award

The Renewable Energy and Advanced Power Electronics Research Laboratory is pleased to announce that their technical paper won "Best Poster" award at the recent IEEE 2013 Photovoltaic Specialists Conference. 

 

The poster, Arc Fault and Flash Detection in PV DC Arrays Using Wavelets, provides a brief synopsis of the research efforts of Dr. Robert S. Balog and PhD student Zhan Wang. Their arc fault detection research was recently recognized for its merit and impact with a grant from the National Science Foundation to support further research in this area. A patent was filed by Texas A&M University on this technology in August 2012.

 

Dr. Balog explains that "Arc faults cause fires, shock hazard, and system failures in photovoltaic (PV) and other direct-current (DC) systems such as a micro grid. Annually, over 28,000 residential electrical fires cause 360 deaths, 1,000 injuries, and $995 million in damage. Arc fault detectors, now required for use in homes, only respond to series arc faults in alternating current (AC) circuits. DC electrical arcs in PV systems can be caused by loose electrical connections (series arc fault) or abrasion of conductors secured to the mounting frame due to thermal expansion, vibration, nesting rodents, or failure within the PV modules (parallel arc fault).

 

The problem of arcing faults exists for small-scale residential systems as well as large-scale utility systems and can pose significant threats to human safety. As long as this problem exists, the PV industry will have significant concerns about liability and the impact upon widespread adoption of photovoltaic energy. Our research into arc fault detection is extremely important for the reliable and safe system operation and will remove significant barriers for high penetration of solar energy."

 

Early results show that the technique is promising not only for dc systems, but also ac systems. Field testing using measured waveforms from both dc solar and ac electrical systems corroborate the simulation results and show efficacy greater than currently available commercial solutions. "We envision that this technology can be used not only to improve the safety of solar energy, but that it can be incorporated into smart meters, smart outlet, or smart appliances to provide superior safety anywhere electricity is used," said Balog.

 

In total, three of four papers accepted for presentation were nominated for "Best Poster" awards. The other papers were:

 

Micro-Inverter and String Inverter Grid-Connected Photovoltaic System - A Comprehensive Study 

Souhib Harb, Mohit Kedia, Haiyu Zhang, Robert S. Balog

 

Multi-Objective Optimization of the DC-DC stage of a Module-Integrated Inverter Based on an Efficiency Usage Model 
Mehran Mirjafari, Robert S. Balog

 

Please contact Dr. Robert S. Balog (contact information listed below) if you would like to learn more about the research into this new technology or if you are interested in exploring research partnerships with Texas A&M University.

_____________________________________________ 

Assistant Professor, Dept. Electrical and Computer Engineering

Director, Renewable Energy & Advanced Power Electronics Research Laboratory
Texas A&M University
216D Zachry Engineering Center
TAMU 3128
College Station, TX 77843-3128
E-mail:
rbalog@ece.tamu.edu 
www.ece.tamu.edu/~rbalog/ 
Phone:  979-862-4985 (office) 

Governor Perry Signs Landmark Water Legislation

Tuesday, May 28, 2013, Austin, Texas
Press Release from the Office of the Governor Rick Perry

  

Gov. Rick Perry today ceremonially signed House Bill 4, which lays the foundation for meeting Texas' water future water needs. HB 4 provides for active, full-time governance at the Texas Water Development Board; creates a new funding mechanism to support water-supply project implementation over the next 50 years; and directs local, regional and state officials to prioritize projects to ensure efficient use of available resources. The governor was joined by Lt. Gov. David Dewhurst and Speaker Joe Straus, as well as bill authors Reps. Allan Ritter, Four Price, Eric Johnson, Doug Miller and Eddie Lucio III, and sponsor Sen. Troy Fraser at the signing ceremony.

 

"Water is an essential part of everyone's life, and ensuring adequate supplies means continued job creation, stronger communities and healthier families for decades to come," Gov. Perry said. "HB 4 will help secure our water supplies for generations, even through rapid population and economic growth, by creating new funds that will support local and regional projects and lower the cost of issuing bonds for much-needed water projects."

 

HB 4 will ensure Texas has a reliable water supply for the next 50 years by promoting conservation and innovative reuse. With voter approval of SJR 1 this fall, this $2 billion investment will fund up to $30 billion in projects over the next 50 years. These measures will help address the increased demand population growth will have on our water needs now and into the future.

 

 Our state's economic engine continues to outpace the rest of the nation, so we're taking aggressive steps to ensure our infrastructure can support the accompanying growth," Lt. Gov. Dewhurst said. "This bill is part of an overall solution that combines great fiscal stewardship with citizen involvement and sound strategic planning to meet our state's water needs for the next fifty years."

 

"The Texas House made HB 4 a top priority because we have all seen the devastating effects that severe drought can have on our farms, our communities and our entire economy," Speaker Straus said. "In addition, we know that a reliable supply of water will help us remain the leading state in the country for job creation."

 

"It has been an honor to work with leadership on securing our future water supply," Rep. Ritter said. "The Governor and the Legislature worked together to help ensure that we will have our most essential element to public health and economic growth for decades to come."

 

"The drought not only has an impact on the health and safety of our communities but it also affects our State's economy and the ability to attract new businesses," Sen. Fraser said. "I am glad that we finally passed HB 4 to implement the State Water Plan, so we can ensure Texas will have sufficient water supplies during times of drought."

 

House Bill 4 becomes law on Sept. 1, 2013.

Focus on the Fellows

With a generous donation of $40,000 from ConocoPhillips, the Energy Institute awarded eight fellowships to support outstanding graduate students doing energy research. Over 40 applicants from 16 departments were nominated for this competitive award. The award recipients are known as "Energy Institute Fellows."

 

Each month, a Fellow will be featured in the highlights section of News Briefs.  This month's featured Fellow is Julian Sculley, a PhD student in the Department of Chemistry.

 

Julian's research project is entitled "High-Throughput Analysis Model to Predict Energy Requirements of Mixed Gas Separations." For a brief abstract of Julian's research, click here.  

 

To see the complete listing of EI Fellows, visit our web site at http://energy.tamu.edu.

 

The Energy Institute (EI) is addressing the world's energy challenges through research, development and deployment. The Institute matches researchers and world-class facilities with internal and external partners to define and solve energy problems and turn those solutions into useful global products.

  Sculley

Energy Institute Fellow
Julian Sculley
PhD Student
Chemistry Department

 

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