Patents Assigned to Tennessee Valley Authority
  • Patent number: 9459600
    Abstract: A method and an automation system for processing information extractable from an engineering drawing file. The automation system includes a controller which models in the engineering drawing file (20) at least two objects (302, 304) in a predefined format by adding at least two entities (34) to the engineering drawing file (20) (S501) and by adding support information (35) to the engineering drawing file (20) (S502) to provide the extractable information (S401), provides a program sequence (80) in an automation application (50) to establish a correlation of the extractable information (S402), correlates the extractable information by executing the program sequence (80) (S403), and generates output data (12, 15) based on the established correlation of the extractable information (S404). The correlation of the extractable information is established only while the program sequence (80) of the automation application (50) is being executed.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: October 4, 2016
    Assignee: Tennessee Valley Authority
    Inventor: Brian Jason Huffine
  • Publication number: 20140297013
    Abstract: A method and an automation system for processing information extractable from an engineering drawing file. The automation system includes a controller which models in the engineering drawing file (20) at least two objects (302, 304) in a predefined format by adding at least two entities (34) to the engineering drawing file (20) (S501) and by adding support information (35) to the engineering drawing file (20) (S502) to provide the extractable information (S401), provides a program sequence (80) in an automation application (50) to establish a correlation of the extractable information (S402), correlates the extractable information by executing the program sequence (80) (S403), and generates output data (12, 15) based on the established correlation of the extractable information (S404). The correlation of the extractable information is established only while the program sequence (80) of the automation application (50) is being executed.
    Type: Application
    Filed: November 9, 2012
    Publication date: October 2, 2014
    Applicant: TENNESSEE VALLEY AUTHORITY
    Inventor: Brian Jason Huffine
  • Publication number: 20140060620
    Abstract: A solar photovoltaic panel system which has a thermal sink and a panel mounting structure is provided. The panel mounting structure contains a water flow section. The water flow section includes an inflow section and an outflow section. A solar photovoltaic panel is mounted between the inflow section and the outflow section. A water supply system is connected to the panel mounting structure to provide water on a top surface of the solar photovoltaic panel. The water provided from the thermal sink is returned to the thermal sink after flowing on the top surface of the solar photovoltaic panel.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 6, 2014
    Applicant: Tennessee Valley Authority
    Inventor: Neil Vincent PLACER
  • Patent number: 7633284
    Abstract: A method and apparatus for automatically monitoring and controlling various parameters of individual ultracapacitor cells in a series string of such cells. These parameters are monitored, and a replacement charge current is delivered to any cell which has lost charge due to discharge either external or internal to the cell. Also, the application of this method and apparatus to energy storage systems for an electrical power transmission grid.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: December 15, 2009
    Assignee: Tennessee Valley Authority
    Inventors: Michael R. Ingram, Dale T. Bradshaw, Thomas D. Geist, Haresh Kamath, Arshad Mansoor, Doni Nastasi, Scott Bunton
  • Patent number: 7294327
    Abstract: A relatively simple and energy efficient multiple stage cryogenic process for the purification of a hydrogen-rich stream by the removal of acid gases, mainly CO2 and H2S, by method of autorefrigeration and delivering or producing those acid gases, mainly CO2, at pressure sufficiently high for disposal by containment, commonly known as sequestration. Autorefrigeration is comprised of (a) condensing acid gases from the syngas stream by cooling the syngas, (b) separating the liquefied acid gases from the syngas, and (c) evaporating the liquefied acid gases at a pressure lower than that of the syngas to provide cooling. The process is composed of multiple autorefrigeration stages to generate multiple acid gas product streams with a pressure as high as practical in each stream so as to lessen the power needed to pressurize the acid gas streams for sequestration.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: November 13, 2007
    Assignee: Tennessee Valley Authority
    Inventors: Timmons S. McClanahan, Michael C. Crim
  • Patent number: 7230837
    Abstract: A method of balancing the voltage of DC links in a cascaded multi-level converter (CMC) semiconductor circuit, including the steps of providing a plurality of H-bridge converters per phase in the CMC circuit and utilizing a three phase duty cycle value from the main controller to determine a normalized duty cycle value, a ceiling duty cycle value and a floor duty cycle value. The normalized duty cycle value and an output current of the CMC is used to determine the direction and polarity of a capacitor current, and utilizing the capacitor current to determine a plurality of output capacitor voltages. A voltage summation result and direction is obtained from a ceiling index pointer and a floor index pointer and the voltage summation result, direction from the ceiling index pointer and a floor index pointer are used to create a combined switching table for the H-bridge converters. A pulse width modulator is utilized to balance the voltage of the DC links and thereby eliminate DC-capacitor voltage imbalance.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: June 12, 2007
    Assignees: North Carolina State University, Tennessee Valley Authority, Electrical Power Research Institute, Inc.
    Inventors: Qin Huang, Abdel-Aty Edris, Michael R. Ingram, Siriroj Sirisukprasert
  • Patent number: 7111407
    Abstract: An apparatus and a method for aligning a vertical shaft or multiple axially coupled vertical shafts in a hydroelectric turbine generator or a similar vertical-shaft system, and for providing precise plumb inclination alignment of a vertical rotating shaft. Precision inclinometers attached to the vertical shaft measure plumb inclination. Proximity probe displacement devices mounted externally of the vertical shaft measure radial movement, throw, or run out at various shaft elevations as the shaft is rotated relative to a fixed point. Data acquisition devices and communication devices accumulate and transmit alignment data to a micro-computer which receives and processes such data. Methods of defining shaft plumb inclination in a static single rotational position and defining plumb inclination of the virtual centerline of a shaft's rotational throw position. A method of swinging, tilting, or adjusting a vertical shaft to a corrected or different plumb position relative to the earth's gravity.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: September 26, 2006
    Assignee: Tennessee Valley Authority
    Inventor: Jeffery Carl Jones
  • Publication number: 20040206491
    Abstract: A heat transfer composition and methods for using same to transfer heat in a transformer. In one embodiment, a heat transfer composition has soy-based oil, an additive comprising a nano-particle size diamond powder characterized by a first mass, and a chemical agent characterized by a second mass, wherein the ratio of the second mass to the first mass is greater than one.
    Type: Application
    Filed: April 17, 2003
    Publication date: October 21, 2004
    Applicant: Vanderbilt University and Tennessee Valley Authority
    Inventors: Jimmy L. Davidson, Dale T. Bradshaw
  • Patent number: 6805844
    Abstract: An apparatus, method and system for the treatment, sampling, and transportation of chemical weapon materiel contained in a small frangible glass, e.g., container. The apparatus, method and system permit the chemical weapon materiel to be easily treated and contained by a technician in the field to produce non-military chemicals suitable for transport and final disposal. An illustrative embodiment of the apparatus includes a single-use vessel having a compression section and a treatment portion for holding a bottle of chemical weapon materiel and a volume of treatment chemical. A cover is positioned on the vessel and is used to support a compression jack. A portion of the compression jack is installed between the cover and a compression frame and is extended until the compression section of the vessel is compressed.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: October 19, 2004
    Assignee: Tennessee Valley Authority
    Inventor: Grady Lynn Holt
  • Patent number: 6751959
    Abstract: A simple, compact, and relatively efficient thermodynamic power cycle system and process for extracting heat from a heat source stream and converting a portion of the heat to mechanical power. The system and process are composed of the same series of four processing units or steps found in the most basic form of a Rankine power cycle: (1) heating (means) of a pressurized working fluid to produce a superheated gas, (2) expansion (means) to a lower pressure to produce power, (3) condensation (means) of the low pressure gas to a liquid, and (4) pumping (means) of the liquid to high pressure to complete the cycle. The working fluid is heated under pressures above critical. The working fluid must have a critical temperature more than 40° F. lower than the temperature of the heat source stream and a normal boiling point less than 32° F.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: June 22, 2004
    Assignee: Tennessee Valley Authority
    Inventors: Timmons S. McClanahan, Michael C. Crim
  • Publication number: 20040107700
    Abstract: A simple, compact, and relatively efficient thermodynamic power cycle system and process for extracting heat from a heat source stream and converting a portion of the heat to mechanical power. The system and process are composed of the same series of four processing units or steps found in the most basic form of a Rankine power cycle: (1) heating (means) of a pressurized working fluid to produce a superheated gas, (2) expansion (means) to a lower pressure to produce power, (3) condensation (means) of the low pressure gas to a liquid, and (4) pumping (means) of the liquid to high pressure to complete the cycle. The working fluid is heated under pressures above critical. The working fluid must have a critical temperature more than 40° F. lower than the temperature of the heat source stream and a normal boiling point less than 32° F.
    Type: Application
    Filed: December 9, 2002
    Publication date: June 10, 2004
    Applicant: TENNESSEE VALLEY AUTHORITY
    Inventors: Timmons S. McClanahan, Michael C. Crim
  • Patent number: 6599423
    Abstract: The present invention relates to novel ex situ processes for simple and economical destruction of air, water, and soil contaminants using naturally occurring microorganisms that are widely available in the environment. The processes utilize novel closed-loop recycle schemes which dramatically improve the efficiency, economics, and practicability of destruction of a wide variety of contaminants, especially VOCs and chloroethylenes, and particularly trichloroethylene (TCE). The processes may be applied on a batch or continuous basis to contaminated soil and groundwater, to contaminated effluents from a wide variety industrial operations, or to wherever such amenable contaminants are present. Certain contaminants, particularly chloroethylenes, are known to be difficult to biodegrade aerobically to non-toxic products without the employment of a primary substrate to induce cometabolic degradation.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: July 29, 2003
    Assignee: Tennessee Valley Authority
    Inventors: Jeffrey L. Boles, Johnny R. Gamble, Laura Lackey
  • Patent number: 6567795
    Abstract: Power industry boiler tube failures are a major cause of utility forced outages in the United States, with approximately 41,000 tube failures occurring every year at a cost of $5 billion a year. Accordingly, early tube leak detection and isolation is highly desirable. Early detection allows scheduling of a repair rather than suffering a forced outage, and significantly increases the chance of preventing damage to adjacent tubes. The instant detection scheme starts with identification of boiler tube leak process variables which are divided into universal sensitive variables, local leak sensitive variables, group leak sensitive variables, and subgroup leak sensitive variables, and which may be automatically be obtained using a data driven approach and a leak sensitivity function. One embodiment uses artificial neural networks (ANN) to learn the map between appropriate leak sensitive variables and the leak behavior.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: May 20, 2003
    Assignees: Tennessee Technological University, Tennessee Valley Authority
    Inventors: Ali T. Alouani, Peter S. Chang
  • Publication number: 20030047508
    Abstract: The present invention relates to novel ex situ processes for simple and economical destruction of air, water, and soil contaminants using naturally occurring microorganisms that are widely available in the environment. The processes utilize novel closed-loop recycle schemes which dramatically improve the efficiency, economics, and practicability of destruction of a wide variety of contaminants, especially VOCs and chloroethylenes, and particularly trichloroethylene (TCE). The processes may be applied on a batch or continuous basis to contaminated soil and groundwater, to contaminated effluents from a wide variety industrial operations, or to wherever such amenable contaminants are present. Certain contaminants, particularly chloroethylenes, are known to be difficult to biodegrade aerobically to non-toxic products without the employment of a primary substrate to induce cometabolic degradation.
    Type: Application
    Filed: August 26, 2002
    Publication date: March 13, 2003
    Applicant: TENNESSEE VALLEY AUTHORITY
    Inventors: Jeffrey L. Boles, Johnny R. Gamble, Laura Lackey
  • Patent number: 6461510
    Abstract: The present invention relates to novel ex situ processes for simple and economical destruction of air, water, and soil contaminants using naturally occurring microorganisms that are widely available in the environment. The processes utilize novel closed-loop recycle schemes which dramatically improve the efficiency, economics, and practicability of destruction of a wide variety of contaminants, especially VOCs and chloroethylenes, and particularly trichloroethylene (TCE). The processes may be applied on a batch or continuous basis to contaminated soil and groundwater, to contaminated effluents from a wide variety industrial operations, or to wherever such amenable contaminants are present. Certain contaminants, particularly chloroethylenes, are known to be difficult to biodegrade aerobically to non-toxic products without the employment of a primary substrate to induce cometabolic degradation.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: October 8, 2002
    Assignee: Tennessee Valley Authority
    Inventors: Jeffrey L. Boles, Johnny R. Gamble, Laura Lackey
  • Patent number: 6269287
    Abstract: A system and method are provided for monitoring trash rack fouling in a turbine facility. The trash rack monitoring system includes sensors for detecting apparent gross head, flow rate, and effective gross head. The head values are used to select performance curves representative of historical turbine operation at the two head values. The two performance curves are simultaneously displayed on a computer monitor to graphically depict the decreased turbine performance resulting from fouling of the trash racks. The performance is also shown as an economic loss value. A method is also provided for optimizing performance in a multi-unit turbine facility. The method involves determining the net head on each turbine unit as a basis for selecting net head performance curves and ultimately deriving an optimum operating point for each turbine unit.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: July 31, 2001
    Assignee: Tennessee Valley Authority
    Inventor: Patrick A. March
  • Patent number: 6192352
    Abstract: Power industry boiler tube failures are a major cause of utility forced outages in the United States, with approximately 41,000 tube failures occurring every year at a cost of $5 billion a year. Accordingly, early tube leak detection and isolation is highly desirable. Early detection allows scheduling of a repair rather than suffering a forced outage, and significantly increases the chance of preventing damage to adjacent tubes. The instant detection scheme starts with identification of boiler tube leak process variables which are divided into universal sensitive variables, local leak sensitive variables, group leak sensitive variables, and subgroup leak sensitive variables, and which may be automatically be obtained using a data driven approach and a leak sensitivity function. One embodiment uses artificial neural networks (ANN) to learn the map between appropriate leak sensitive variables and the leak behavior.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: February 20, 2001
    Assignees: Tennessee Valley Authority, Tennessee Technological University
    Inventors: Ali Tahar Alouani, Peter Shih-Yung Chang
  • Patent number: 6136281
    Abstract: The present invention relates to a method to catalyze the oxidation of Hg(0) in a flue gas stream prior to standard emissions control equipment. The oxidized mercury has been found to be more condensable than Hg(0) and consequently more easily removed from the gas phase. Accordingly, mercury in its oxidized form can be trapped from a flue gas stream or the like by absorption onto a solid mass or can be more efficiently removed from flue gas streams by wet processes such as a two-stage wet FGD. The gist underlying the inventive concept of the instant invention relates to the use of a porous bed of gold-coated material that is saturated with Hg(0) to the point that the gold in the presence of HCl in the exhaust stream catalyses the oxidation of Hg(0).
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: October 24, 2000
    Assignee: Tennessee Valley Authority
    Inventors: Sandra J. Meischen, Vincent J. Van Pelt
  • Patent number: 6063204
    Abstract: A process, system, and apparatus for effectively and economically producing fermentable sugars from cellulosic feedstocks is described. The economic viability of using wood and/or agricultural waste, containing large fractions of cellulose and hemicellulose is highly dependent on the method used for hydrolysis. Underlying the gist of this invention are newly discovered methods, means, and techniques by which both the pentosans and hexosans comprising the hemicellulose fraction of the selected feedstock and the hexosans comprising the cellulose fraction of the selected feedstock can be quickly and efficiently converted in a single pass through a single device to fermentable sugars containing minimal quantities of degradation products known to inhibit fermentation.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: May 16, 2000
    Assignees: Tennessee Valley Authority, University of Southern Mississippi
    Inventors: Roger D. Hester, George E. Farina
  • Patent number: 5988081
    Abstract: A method and system for the use of waste coal fines to reduce nitrogen oxides emissions from a coal-fired cyclone boiler. A coal water slurry including waste coal fines is injected as a co-firing fuel into a cyclone barrel of the cyclone boiler to partially oxidize the coal water slurry in a central portion of the cyclone barrel where injected. This produces a reducing zone having reducing gas species that convert nitrogen oxides to diatomic nitrogen. The coal water slurry can alternatively be injected into the cyclone barrel from a secondary combustion air conduit. The evaporation of the water from the coal water slurry reduces the overall combustion temperature in the cyclone barrel, further reducing the production of nitrogen oxides.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: November 23, 1999
    Assignees: Energy & Environmental Research Corporation, Tennessee Valley Authority
    Inventors: Robert A. Ashworth, W. Richard Carson, Todd A. Melick, Todd M. Sommer