The following is a visual presentation of my CV, research and previous work I have been involved in at St. Anthony Falls Laboratory, University of Minnesota.
Modeling and Implementation of a PV-powered DC Water Pump System for IrrigationKhery Ali
The agriculture sector nowadays relies mostly on conventional energy sources and traditional irrigation ways. Considering some factors such as high costs of fossil fuels and providing new power lines, especially to remote locations and where grid electricity is either inaccessible or expensive, a solar PV powered irrigation system can be a practical choice for irrigating crop fields. In this paper, a PV-powered dc water pump system design for irrigation is presented. A comprehensive comparison between Direct Current (DC) and an Alternative Current (AC) motors powered by PV is carried out in terms of power, current, water discharge and cost. Dominant factors of the system such as the effect of solar radiation on motor power, current, and water discharge are considered in this study. The optimum tilt angle for Duhok city is considered to perform this study. The specifications of PV, DC and AC motors are tested in Matlab Simulink to show the performance of the system components. The results show that DC motor is preferred over AC in term of system complexity, cost and power consumption. In contrast, water discharge of AC pump is slightly higher than the DC pump for the same time. However, overall results demonstrate the superiority of DC motor over AC.
Egypt is one of the biggest and affected country in Africa and Middle East, which
affected by increasing population and many developing projects. The Nile is the artery
of life to Egypt as it shares with other ten countries as it considered the longest river
by adding its tributaries which reach 6,850 km. Egypt is suffering from deficit of water
resources at the present and in the future. Modeling may be helpful in solving water
shortage problems in the Nile valley with successful future planning. Many previous
studies had applied mathematical, physical and mechanical models on Nile river basin
and studying the impact of climate change and new strategies in water resources
management and using the GIS and share decisions with al participates. In the present
research, we apply WEAP program on east Nile delta and study Sharkia Governorate
as case study as it is the third big governorate in population and it is expected to
suffering from water deficit problem, so to achieve this deficit place and amount. We
feed the program with total resources of main canals (Ismailia and Bahr Mowais) and
total demand of water from different sectors; irrigation, domestic, and industrial
water demands. then the program determines the deficit area and redistributes the
water according to demand node priorities. We concluded that the water deficit value
=11.6MCM/year occur at the end of irrigation network (San Al Hagar & Al Salheya
region) where some illegal actions done by the farmers to overcome this water
shortage.
Upstream Suburban Philadelphia Sub-Watershed Cluster Modeling OverviewKim Beidler
Upstream Suburban Philadelphia Sub-Watershed Cluster Modeling Overview by Jeffrey Featherstone, Ph.D., Director, Center for Sustainable Communities, Temple University
Current status of Wells Turbine for Wave Energy Conversionijsrd.com
The method of wave energy conversion utilizes an oscillating water column (OWC). The OWC converts wave energy into low-pressure pneumatic energy in the form of bi-directional airflow. Wells has been used to convert this pneumatic power into uni-directional mechanical shaft power. But a Wells turbine has inherent disadvantages like lower efficiency and poorer starting characteristics. This paper provides current status of wells turbine and reviews various researches done to improve starting and running characteristics of wells turbine.
Modeling and Implementation of a PV-powered DC Water Pump System for IrrigationKhery Ali
The agriculture sector nowadays relies mostly on conventional energy sources and traditional irrigation ways. Considering some factors such as high costs of fossil fuels and providing new power lines, especially to remote locations and where grid electricity is either inaccessible or expensive, a solar PV powered irrigation system can be a practical choice for irrigating crop fields. In this paper, a PV-powered dc water pump system design for irrigation is presented. A comprehensive comparison between Direct Current (DC) and an Alternative Current (AC) motors powered by PV is carried out in terms of power, current, water discharge and cost. Dominant factors of the system such as the effect of solar radiation on motor power, current, and water discharge are considered in this study. The optimum tilt angle for Duhok city is considered to perform this study. The specifications of PV, DC and AC motors are tested in Matlab Simulink to show the performance of the system components. The results show that DC motor is preferred over AC in term of system complexity, cost and power consumption. In contrast, water discharge of AC pump is slightly higher than the DC pump for the same time. However, overall results demonstrate the superiority of DC motor over AC.
Egypt is one of the biggest and affected country in Africa and Middle East, which
affected by increasing population and many developing projects. The Nile is the artery
of life to Egypt as it shares with other ten countries as it considered the longest river
by adding its tributaries which reach 6,850 km. Egypt is suffering from deficit of water
resources at the present and in the future. Modeling may be helpful in solving water
shortage problems in the Nile valley with successful future planning. Many previous
studies had applied mathematical, physical and mechanical models on Nile river basin
and studying the impact of climate change and new strategies in water resources
management and using the GIS and share decisions with al participates. In the present
research, we apply WEAP program on east Nile delta and study Sharkia Governorate
as case study as it is the third big governorate in population and it is expected to
suffering from water deficit problem, so to achieve this deficit place and amount. We
feed the program with total resources of main canals (Ismailia and Bahr Mowais) and
total demand of water from different sectors; irrigation, domestic, and industrial
water demands. then the program determines the deficit area and redistributes the
water according to demand node priorities. We concluded that the water deficit value
=11.6MCM/year occur at the end of irrigation network (San Al Hagar & Al Salheya
region) where some illegal actions done by the farmers to overcome this water
shortage.
Upstream Suburban Philadelphia Sub-Watershed Cluster Modeling OverviewKim Beidler
Upstream Suburban Philadelphia Sub-Watershed Cluster Modeling Overview by Jeffrey Featherstone, Ph.D., Director, Center for Sustainable Communities, Temple University
Current status of Wells Turbine for Wave Energy Conversionijsrd.com
The method of wave energy conversion utilizes an oscillating water column (OWC). The OWC converts wave energy into low-pressure pneumatic energy in the form of bi-directional airflow. Wells has been used to convert this pneumatic power into uni-directional mechanical shaft power. But a Wells turbine has inherent disadvantages like lower efficiency and poorer starting characteristics. This paper provides current status of wells turbine and reviews various researches done to improve starting and running characteristics of wells turbine.
Presentation highlights the potential of satellite data products, modeling tools and Smart-ICT platform to assist flood-based farming to enable rural people to overcome poverty and improve food productivity while reducing water consumption.
The project demonstrates for the last two flood seasons how satellite data can detect the extent and duration of flooding in various irrigation block and the authorities can make use of such information to know when and where the flood waters are reaching the farm fields and how many days it got inundated. We have also showcased how flood forecasting tools can help downstream authorities to make operational planning including maintenance of irrigation blocks and early warning for local communities.
Water resource management at catchment scales using lightweight UAVs: current...Judit Urquijo
L. DeBell, K. Anderson, R.E. Brazier, N. King, and L. Jones (CC BY 4.0)
http://www.nrcresearchpress.com/toc/juvs/0/0
Lightweight, portable unmanned aerial vehicles (UAVs) or ‘drones’ are set to become a key component of a water resource management (WRM) toolkit, but are currently not widely used in this context. In practical WRM there is a growing need for fine-scale responsive data, which cannot be delivered from satellites or aircraft in a cost-effective way. Such a capability is needed where water supplies are located in spatially heterogeneous dynamic catchments. In this review, we demonstrate the step change in hydrological process understanding that could be delivered if WRM employed UAVs. The paper discusses a range of pragmatic concepts in UAV science for cost-effective and practical WRM, from choosing the right sensor and platform combination through to practical deployment and data processing challenges. The paper highlights that multi-sensor approaches, such as combining thermal imaging with fine- scale structure-from-motion topographic models, are currently best placed to assist in WRM decision-making because they provide a means of monitoring the spatio-temporal distribution of sources, sinks, and flows of water through landscapes. The manuscript highlights areas where research is needed to support the integration of UAVs into practical WRM, for example, in improving positional accuracy through integration of differential global positioning system sensors, and developing intelligent control of UAV platforms to optimize the accuracy of spatial data capture.
The stable atmospheric boundary layer a challenge for wind turbine operatio...ndkelley
An overview presentation of the impact and challenge of the stable atmospheric boundary layer on wind turbine dynamics presented to AGU Fall Meeting 2008
International Underwater Explorations presents an integrated visualization system for hydrographic and oceanographic data for use as a dual use decision support system that can be applied to naval mission planning, alternative energy site selection, and harbor and coastal emergency response.
Hydrodynamics of the Pentland Firth: Understanding the energy resource.
The preliminary results of SUNTÇANS model confirm the complex hydrodynamics of this area, identifying eddies and sites of high flow rate
Oscillating water column and government regulation of oceanArjun Puthusseri
This paper describes the methods developed by Wavegen during the design and development phase of its air turbines suitable for installation into active renewable energy breakwater schemes, like the one being built in Mutriku, Northern Spain, ref. Fig.1.The breakwater water is located in 7m of water MWL and is NNE facing. The majority of the structure is of a conventional rubble mound construction and has a crescent shape with an overall length off 600m. The active zone where the oscillating water columns (OWC) are positioned are made from reinforced concrete and are of a novel modular construction.
Solar Energy Assessment for Community Energy PlanningLeonardo ENERGY
A comprehensive, multi-step approach to assessing solar energy opportunities for regional development and community energy planning is presented by Green Power Labs (Canada).
Lutes, C. MEW/Moffett Field Buildings 15 and 17 – A Review of Multiple Published Studies; Site in IECC Climate Zone 3C; Presented at US EPA Workshop on: Measurement-Based Methods for Protective & Defensible Chlorinated VI Exposure Determinations; AEHS East Coast Conference, October 22, 2019, Amherst MA.
Apresentação ministrada pelo Sr. Tom Wills, Consultor Sênior de Ondas e Correntes da Aquatera, exibida durante o Seminário Hidrocinética no Norte do Brasil, realizado em Brasília no dia 27 de abril 2016, no Auditório da Eletronorte.
Presentation highlights the potential of satellite data products, modeling tools and Smart-ICT platform to assist flood-based farming to enable rural people to overcome poverty and improve food productivity while reducing water consumption.
The project demonstrates for the last two flood seasons how satellite data can detect the extent and duration of flooding in various irrigation block and the authorities can make use of such information to know when and where the flood waters are reaching the farm fields and how many days it got inundated. We have also showcased how flood forecasting tools can help downstream authorities to make operational planning including maintenance of irrigation blocks and early warning for local communities.
Water resource management at catchment scales using lightweight UAVs: current...Judit Urquijo
L. DeBell, K. Anderson, R.E. Brazier, N. King, and L. Jones (CC BY 4.0)
http://www.nrcresearchpress.com/toc/juvs/0/0
Lightweight, portable unmanned aerial vehicles (UAVs) or ‘drones’ are set to become a key component of a water resource management (WRM) toolkit, but are currently not widely used in this context. In practical WRM there is a growing need for fine-scale responsive data, which cannot be delivered from satellites or aircraft in a cost-effective way. Such a capability is needed where water supplies are located in spatially heterogeneous dynamic catchments. In this review, we demonstrate the step change in hydrological process understanding that could be delivered if WRM employed UAVs. The paper discusses a range of pragmatic concepts in UAV science for cost-effective and practical WRM, from choosing the right sensor and platform combination through to practical deployment and data processing challenges. The paper highlights that multi-sensor approaches, such as combining thermal imaging with fine- scale structure-from-motion topographic models, are currently best placed to assist in WRM decision-making because they provide a means of monitoring the spatio-temporal distribution of sources, sinks, and flows of water through landscapes. The manuscript highlights areas where research is needed to support the integration of UAVs into practical WRM, for example, in improving positional accuracy through integration of differential global positioning system sensors, and developing intelligent control of UAV platforms to optimize the accuracy of spatial data capture.
The stable atmospheric boundary layer a challenge for wind turbine operatio...ndkelley
An overview presentation of the impact and challenge of the stable atmospheric boundary layer on wind turbine dynamics presented to AGU Fall Meeting 2008
International Underwater Explorations presents an integrated visualization system for hydrographic and oceanographic data for use as a dual use decision support system that can be applied to naval mission planning, alternative energy site selection, and harbor and coastal emergency response.
Hydrodynamics of the Pentland Firth: Understanding the energy resource.
The preliminary results of SUNTÇANS model confirm the complex hydrodynamics of this area, identifying eddies and sites of high flow rate
Oscillating water column and government regulation of oceanArjun Puthusseri
This paper describes the methods developed by Wavegen during the design and development phase of its air turbines suitable for installation into active renewable energy breakwater schemes, like the one being built in Mutriku, Northern Spain, ref. Fig.1.The breakwater water is located in 7m of water MWL and is NNE facing. The majority of the structure is of a conventional rubble mound construction and has a crescent shape with an overall length off 600m. The active zone where the oscillating water columns (OWC) are positioned are made from reinforced concrete and are of a novel modular construction.
Solar Energy Assessment for Community Energy PlanningLeonardo ENERGY
A comprehensive, multi-step approach to assessing solar energy opportunities for regional development and community energy planning is presented by Green Power Labs (Canada).
Lutes, C. MEW/Moffett Field Buildings 15 and 17 – A Review of Multiple Published Studies; Site in IECC Climate Zone 3C; Presented at US EPA Workshop on: Measurement-Based Methods for Protective & Defensible Chlorinated VI Exposure Determinations; AEHS East Coast Conference, October 22, 2019, Amherst MA.
Apresentação ministrada pelo Sr. Tom Wills, Consultor Sênior de Ondas e Correntes da Aquatera, exibida durante o Seminário Hidrocinética no Norte do Brasil, realizado em Brasília no dia 27 de abril 2016, no Auditório da Eletronorte.
Generate clean, green, renewable electricity from rivers and canals with the Hydrokinetic Power Barge. The Power Pontoon requires no construction or civil engineering works, does not need dam walls, and is an environmentally friendly, low impact technology which can be implemented in days instead of months or years.
Design & Analysis of a Helical Cross Flow TurbineAnish Anand
We investigate the flow past a cross flow hydrokinetic turbine (CFHT)in which a helical blade turns around a shaft perpendicular to the free stream under the hydrodynamic forces exerted by the flow. The ability of a cross flow turbine to rotate in the same direction independent of the water flow direction gives an advantage for hydrokinetic applications.
This type of turbine, while very different from the classical horizontal axis turbine commonly used in the wind energy field, presents advantages in the context of hydro kinetic energy harvesting, such as independence from current direction, including reversibility, stacking, and self-starting without complex pitch mechanisms.
Marine Energy Resources: Tapping into the Power of Waves and TidesChristo Ananth
Christo Ananth, Rajini K R Karduri, "Marine Energy Resources: Tapping into the Power of
Waves and Tides", International Journal of Advanced Research in Basic Engineering Sciences and Technology (IJARBEST), Volume 7,Issue 1,January 2021,pp 58-66
Generation of Hydroelectricity By Sea Wavesvivatechijri
Oscillation Wave Column (Owc) is generation of electricity and most popular categories of wave
energy device. They work on the natural wave action i.e alternate compression & decompression of Trapped Air to
generate electricity. In the view of rising population & more consumption of electricity, alternative thinking for
generation of electricity for future use is essential. In recent years the application of generation of hydroelectricity
(By OWC) in most of the country is widely acceptable. The Main objective of present research work is to provide &
popularize the simple, feasible, ecofriendly, renewable source for generation of electricity. OWC technology in
such a type of system, which hardness energy from oscillation of seawater into chamber & converts wave energy
into electrical energy with low energy impact
Model of Ocean Wave Energy Converter Based on Water Mass Gravity Force as a R...AM Publications
The aim of this study was to develop a model of ocean wave energy converter based on water mass gravity force (WEC-WGF) to overcome the flaws of existing wave energy converter that rely on water buoyancy force. This paper presented physical model experiment result of wave energy converter based on water mass gravity force. The harvested energy were compared with calculated theoretical energy based on linear wave theory. The physical model investigation was carried out at wave simulator (flume) in Hydraulics Laboratory Department of Civil Engineering, Hasanuddin University Indonesia on February - March 2016. The physical model consists of a series of one-way gear connected with plastic container as an interface between converter and regular generated wave. Investigation was carried out to observe the influence of gravity weight mass and wave height variations on converters harvested power. The experiment result indicated that the amount of converter Power Take Off (PTO) were strongly influenced by variation of gravity weight mass (Mgw), followed by wave height (H) and wave period (T) respectively. These results outperform the calculated power by means of linear wave theory. The result of this experiment could be used as a reference to develop theoretical or analytical model of wave energy converter based on water mass gravity force.
A comparative study on river hydrokinetic turbines blade profilesIJERA Editor
Diesel based electricity supply is the common practice in rural and isolated areas in the North of Brazil. The diesel fuel is usually transported from a nearby city as Manaus by river to these isolated communities. During wet seasons and inundations this means of transport is very risky and not usually safe. The hydrokinetic technology is among the promising technologies for most of the Amazon areas because of the large hydraulic capacity and low density population settlements. In this paper the authors propose a cheap hydrokinetic turbine system whose blades are easy to design, manufacture, replace when necessary and its operation is independent of flow direction. In this work CFD, RANS (Reynolds Average Navier Stokes) equations are used to characterize and develop a methodology of numerical simulation of a vertical axis hydrokinetic turbine. In the simulations, four blade profiles were investigated. The effects of the number of blades, blade profile and water flow velocity on the turbine torque and power coefficients were presented and discussed.
The Illustration of Mechanism and development of Atmospheric dynamic peripher...iosrjce
This research papers illustrates and justify the soil shifting and a pre determinant mechanism of
testing and real time analysis of soil composition and the behavior by concentric waveform generation and the
field effect of the concentric waves thus formed. The waveforms generated are being analyzed using a field wire
enclosure structure having a non conducting cylinder with circular magnetic field effect induction. The
electrical pulses being generated are plotted against fluid viscosity behavior. The research paper illustrates
with conclusion and analysis that a correlation simulation model is possible with fluid properties to generate
non obvious prediction mechanism to possible pulse generator.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Student information management system project report ii.pdf
Craig Hill visual resume
1. Craig Hill
Ph.D. Graduate Research Assistant
Civil, Environmental, and Geo-Engineering Department
St. Anthony Falls Laboratory
College of Science and Engineering – University of Minnesota
(E) hill.craig.s@gmail.com
Ph.D. Research Topic
Interactions between channel topography and hydrokinetic turbines:
Sediment transport, turbine performance and wake characteristics.
The following is a visual presentation of my CV, research and previous work I
have been involved in at St. Anthony Falls Laboratory, University of Minnesota.
Please contact me for an expanded publication/presentation list, references, or additional information.
Updated: April 22, 2015
2. St. Anthony Falls Laboratory
College of Science & Engineering – University of Minnesota
Website: http://safl.umn.edu/
St. Anthony Falls Laboratory is an interdisciplinary research laboratory at the
University of Minnesota focusing on energy, environmental, biological, and
geophysical engineering fluid dynamics problems. The laboratory collaborates
with many national and international academic institutions, government agencies
and laboratories, and industry companies on both basic and applied research
problems. Located along the Mississippi River in Minneapolis, MN, the laboratory
provides a unique setting for advancing renewable energy technologies,
investigating aquatic species interaction with the geomorphic environment,
developing advanced hydraulic structures, and focusing on challenging fluid
dynamics problems on renewable energy, the environment, and human health.
The following slides show highlights from a few of the many projects I have been
an integral member of as either a Research Scientist and Research Engineer
(2006-2012) or during my Ph.D. program (2012-2015) at St. Anthony Falls
Laboratory. As a member of the Engineering Staff, I was responsible for proposal
writing, model mechanical system and instrumentation design, data acquisition
and analysis, and project publications. My research, leadership, and engineering
skills continued to develop during my Ph.D. tenure as I focused on researching
the interactions between MHK devices and complex topographic environments.
Examples of facilities and projects, clockwise from bottom-left:
Potomoc River water intake model (1), wind tunnel study on
wind turbine interactions (2), river delta dynamics in a
subsiding basin (3), Folsom Dam Spillway aeration model
(4), and scaled model testing of hydrokinetic turbines (5).
3
2
1
4
5
Updated: April 22, 2015
3. Wind Turbine:
Clipper Liberty 2.5MW
96m diameter rotor
420 feet tower
SCADA system
425’ Meteorological tower
Data/sensor systems:
Turbine systems
Blades
Wind and weather
LiDAR
Eolos wind turbine blade sensor data visualization
Eolos wind turbine data visualization during a storm
Eolos meteorological tower data visualization during a storm
On site during tower and rotor assembly.
Standing next to the blade during sensor installation on
interior of 46m blades.
Eolos Wind Energy Research Station
A full scale wind energy research station promoting collaboration among academia, industry, and government.
The UMN St. Anthony Falls Laboratory Eolos Wind Energy
Research Station was funded by the U.S. Department of Energy as
a research center for advancing wind energy and collaboration
among academic, industry, and government agencies.
I assisted in installing fiber optic strain gauges and accelerometers
along the interior of the 46m turbine blades used to monitor forces
experienced by each blade during turbine operation.
For examples of data collected from the turbine blades, foundation
sensors, and meteorological tower, please visit the links to the right.
Updated: April 22, 2015
4. Hill, C., Musa, M., Chamorro, L., Ellis, C., and Guala, M. (2014). “Local scour around a model hydrokinetic turbine in an erodible channel.” J. Hydraul. Eng., 140(8),
04014037.
Hill, C., Musa, M., and Guala, M. (2015). “Interactions between instream axial flow hydrokinetic turbines and uni-directional flow bedforms.” Under revision, Ren.
Energy.
Marine Hydrokinetic Energy
Interactions between hydrokinetic turbines, complex topography, and sediment transport.
Uncertainties surrounding the interactions between hydrokinetic devices and the
surrounding ecological and physical environment are one of the lengthy and costly barriers
that the burgeoning hydrokinetic energy industry faces. Through my research, I aim to
expand the understanding of the interaction between devices and the morphodynamic
environment, hopefully leading to accelerated environmental impact assessment processes
and fewer permitting barriers for the development of the MHK industry. My research has
also provided promising insights applicable for advanced device control in complex
energetic environments.
Through the use of multi-scale laboratory experiments, I investigate the local and far-field
effects MHK devices have on sediment transport, as well as how complex topography of all
sizes impacts device performance and wake characteristics, important quantities to
understand when design multi-turbine array power plants.
Local erosion and
deposition downstream of
an axial-flow marine
turbine.
Experimental instrumentation and setupStudying the effects of turbine spacing on erosion and deposition in clear water (below
left) and live bed (below right) sediment transport conditions, including how device
performance changes in mobile substrate environments.
Updated: April 22, 2015
5. Chamorro, L.P., Hill, C., Morton, S., Ellis, C., Arndt, R.E.A. and Sotiropoulos, F., (2013). “On the interaction between a turbulent open channel flow and an axial-flow
turbine,” J. Fluid Mech., 716: 658-670.
Neary, V.S., Gunawan, B., Hill, C., and Chamorro, L.P. (2013). “Near and far field flow disturbances induced by a model hydrokinetic turbine: ADV and ADP comparison.
Ren. Energy, 60: 1-6.
Chamorro, L.P., Hill, C., Neary, V.S., Gunawan, B., Arndt, R.E.A., and Sotiropoulos, F., (2015), “Effect of energetic coherent motions on the power and wake of an axial-
flow turbine,” under revision, Phys. Fluids.
Gunawan, B., Neary, V.S., and Hill, C. (2015), “Comparison of fixed and moving vessel ADCP measurements in a large laboratory flume,” under revision, J. Hydraul. Eng.
Marine Hydrokinetic Energy
Turbine response to energetic coherent turbulent inflow conditions.
I collected detailed velocity and performance measurements in
a large-scale open channel flume at SAFL to investigate
turbulent wake characteristics and performance of an axial-flow
turbine (color contour images at right).
In collaboration with Oak Ridge National Laboratories (ORNL),
obstacles of various diameters were positioned upstream of the
turbine to investigate the impact energetic coherent turbulent
eddies had on device performance, near-field wake
characteristics (i.e. tip vortex), and far-field wake velocity deficit
recovery (bottom right). Synchronous high resolution
measurements from acoustic Doppler velocimeters (ADVs) and
turbine torque and angular velocity provided insight into the
dynamics and response of turbines in the presence of large-
scale coherent eddies.
SAFL continues to develop partnerships with leading MHK
industry partners and emerging device developers. Currently
we are working with Verdant Power on their next-generation
device development and site-specific optimization for the
Roosevelt Island Tidal Energy (RITE) Site through a project
funded by the National Science Foundation.
Updated: April 22, 2015
6. Marine Hydrokinetic Energy
U.S. Department of Energy Reference Model Testing Program.
I designed the mechanical system and instrumentation sensor integration for
scaled reference model axial flow turbine (1:40 scale, top right) and cross flow
turbine (1:15 scale, bottom right) using Solidworks. Detailed dimensioned
drawings for each component were required for fabrication.
The U.S. Department of Energy reference model program aims to accelerate
the development of marine and hydrokinetic turbines. I performed experiments
at SAFL using the dual-rotor models for both turbines. Measurements were
collected on detailed performance and wake velocity characteristics.
The robust dataset on device performance and wake velocity characteristics
serves as a extensive validation dataset for development of computational
models used for research and development of MHK technologies.
Cross flow turbine
Axial flow turbine
Experimental setup used to collect high resolution synchronous
measurements of turbine rotor torque, blade rotational velocity, and 3D flow
turbulence in an open-channel test facility at St. Anthony Falls Laboratory.
Updated: April 22, 2015
7. Marine Hydrokinetic Energy
CFD modeling of the U.S. Department of Energy reference model cross flow turbine
Far Wake
Volumetric
Control
Near Wake
Volumetric Control
Left & Right
Rotating Regions
Near Turbine
Volumetric Control
Main Water
Channel Region
Grid refinement in various
regions using polyhedral grid
• I performed Star-CCM+ computational fluid dynamics
modeling of the US Department of Energy reference model
cross flow turbine (RM2). For this project, I utilized Sandia
National Laboratories High Performance Computing (HPC)
resources.
• Completed grid dependence study to examine how blade lift,
drag, and torque characteristics changed over a range of
coarse to fine grid cell sizes.
• Used rotating reference frames to model counter-rotating
turbine rotors. Monitored blade forces, turbine performance,
and wake characteristics to compare to measured
experimental values from SAFL.
Comparison between simulations and measured
experimental values of torque vs. angle during rotation.
Updated: April 22, 2015
8. Wave Energy Conversion
Aalborg University, Aalborg, Denmark – Modeling and Control of WECs
WaveStar, a full-scale
WEC device visited in
Hanstholm, Denmark
Laboratory facilities used for testing control
strategies for model point-absorber WECs
Comparing numerical vs. experimental results for heave
motion of model point-absorber WEC (shown below).
Two-week training in Control and Modeling of Wave Energy Converters
at Aalborg University, Aalborg, Denmark.
Work included small-scale modeling, control algorithm development,
numerical modeling of WEC control and motion, and observation of multi-
scale WEC research and development.
Course topics: WEC power estimation, production and analysis, wave
measurements and analysis, wave theory, wave-to-wire numerical
modeling, floating body response, and laboratory experimental
techniques.
Updated: April 22, 2015
9. Khosronejad, A., Hill, C., Kang, S., and Sotiropoulos, F. (2013), “Computational and experimental investigation of scour past laboratory models of stream restoration rock
structures,” Adv. Water Res., 54: 191-207.
Kang, S., Lightbody, A., Hill, C., and Sotiropoulos, F., (2011), “High-resolution numerical simulation of turbulence in natural waterways,” Adv. Water Res., 43: 98-113.
Khosronejad, A., Kozarek, L.J., Diplas, P., Jha, R., Hill, C., and Sotiropoulos, F. (2015). “Simulation-based approach for in-stream structure design: Rock-vanes.” Under
review, J. Hydraul. Eng.
Personal Training in Stream Restoration:
Certificate in Stream Restoration Science and Engineering,
2008. National Center for Earth-surface Dynamics through the
University of Minnesota.
Rosgen Training Level 1 (Applied Fluvial Geomorphology) and 2
(River Morphology and Applications) through Wildland
Hydrology.
Instream Flow Control and Stream Restoration Structures
Improving flow and erosion control structures using a multi-scale scientific approach.
Large-scale
experiments
Small-scale laboratory
experiments
Field
measurements
Numerical simulations
Funded by the National Cooperative Highway Research
Program (NCHRP), the project aimed to develop design
guidelines for flow-control structures commonly used in
streambank stabilization projects, for example, rock vanes,
J-hook vanes, cross vanes, W-weirs, and bendway weirs.
Multi-scale physical and computational models were
employed (images at right), including small-scale laboratory
measurements, large-scale measurements in the SAFL
Outdoor StreamLab, field-scale site measurements, and
numerical validation and simulations for multiple scales.
I was the lead research engineer for the indoor laboratory
experiments, measurements, and analysis, as well as the
field site measurements.
Updated: April 22, 2015
10. River Delta Dynamics
Modeling river delta dynamics to understanding delta formation, restoration, and preservation
Experimental river delta studies to investigate the surface
processes and channel sedimentation and avulsion dynamics.
Managed oil industry consortium courses on shallow and
deep water fluvial-deltaic environments, including course
planning and coordination, data collection and analysis, and
participation in teaching course participants.
Created sub-surface stratigraphic records preserved during
experiments to measure delta growth rate, sediment retention
capabilities, and mark sequence stratigraphic boundaries to
compare to surface processes and surface topography
recorded during the experiments.
Wax Lake Delta, Louisiana
The above images show the type of high resolution elevation data I
would collect from experimental delta research projects. The 2mm by
2mm grid elevation data provided opportunities to monitor channel
overbank and in-channel sedimentation processes. These data along
with field measurements from deltas such as the Wax Lake Delta in
Louisiana provide datasets for numerical model validation to improve our
understanding of delta growth and sediment redistribution processes.
Updated: April 22, 2015
11. Remote Southwest Alaska Fieldwork
Mineral assessment of the Aniak Mining District, SW Alaska
• Field geologist for the Bureau of Land Management,
Alaska, assisting with mineral assessment of remote SW
Alaska.
• Daily work included monitoring communication
equipment to base camp area, extended daily field site
visits via helicopter and hiking, and identification and
reporting of mineralogical findings each day.
Setting up communications instrumentation in the field
Field site visits in remote SW Alaska
Daily mode of
transportation
Updated: April 22, 2015