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The Mutual Action of Airplane Body and Power Plant

Description: The present report concerns the development of general propeller performance and r.p.m. curves which, combined with the general curve of the power required for level flight, presents a complete picture of the performance. The curve of power required for level flight in this paper is only an approximation for constant profile drag coefficient, meaning that it is not suitable to unconventional wing sections.
Date: April 1932
Creator: Schrenk, Martin
Partner: UNT Libraries Government Documents Department

Free Flight Investigation at Transonic Speeds of the Power-on Characteristics Including Some Effects of Sonic Propulsive Jets of a Four Engine Delta Wing Configuration

Description: Report discussing a model of a delta-wing configuration with four engines mounted two to a nacelle below the wing that was tested a variety of Mach numbers and Reynolds numbers. The wing static-pressure coefficients, wing pressure coefficients, and lift coefficient of different configurations are described.
Date: August 16, 1957
Creator: Falanga, Ralph A. & Judd, Joseph H.
Partner: UNT Libraries Government Documents Department

Design of power-plant installations pressure-loss characteristics of duct components

Description: "A correlation of what are believed to be the most reliable data available on duct components of aircraft power-plant installations is presented. The information is given in a convenient form and is offered as an aid in designing duct systems and, subject to certain qualifications, as a guide in estimating their performance. The design and performance data include those for straight ducts; simple bends of square, circular, and elliptical cross sections; compound bends; diverging and converging bends; vaned bends; diffusers; branch ducts; internal inlets; and an angular placement of heat exchangers" (p. 1).
Date: June 1944
Creator: Henry, John R.
Partner: UNT Libraries Government Documents Department

A unique distribution system loss minimization scheme via reconfiguration with line capability limits

Description: This paper describes an integrated scheme for distribution system loss minimization with consideration of line capability limits via reconfiguration. Line capability limits are incorporated into the single loop optimization process as constraints. The integrated scheme is tested by 38-bus distribution system for different initial configurations, system losses are reduced significantly without any overload occurrence on feeder transformer network.
Date: June 1, 1997
Creator: Momoh, J.A.; Wang, Y. & Rizy, D.T.
Partner: UNT Libraries Government Documents Department

Multilevel converters for power system applications

Description: Multilevel converters are emerging as a new breed of power converter options for power system applications. These converters are most suitable for high voltage high power applications because they connect devices in series without the need for component matching. One of the major limitations of the multilevel converters is the voltage unbalance between different levels. To avoid voltage unbalance between different levels, several techniques have been proposed for different applications. Excluding magnetic-coupled converters, this paper introduces three multilevel voltage source converters: (1) diode-clamp, (2) flying-capacitors, and (3) cascaded inverters with separate dc sources. The operation principle, features, constraints, and potential applications of these converters will be discussed.
Date: September 1, 1995
Creator: Lai, J.S.; Stovall, J.P. & Peng, F.Z.
Partner: UNT Libraries Government Documents Department

Properties of Power Series Rings

Description: This thesis investigates some of the properties of power series rings. The material is divided into three chapters. In Chapter I, some of the basic concepts of rings which are a prerequisite to an understanding of the definitions and theorems which follow are stated. Simple properties of power series rings are developed in Chapter II. Many properties of a ring R are preserved when we attach the indeterminant x to form the power series ring R[[x]]. Further results of power series rings are examined in Chapter III. An important result illustrated in this chapter is that power series rings possess some of the properties of rings of polynomials.
Date: August 1990
Creator: O'Brien, Rita Marie
Partner: UNT Libraries

Saving Coal in Steam Power Plants

Description: Technical paper issued by the Bureau of Mines over studies conducted on steam power plants. The comparison of using purchased power versus using power from a private plant is discussed. This paper includes illustrations.
Date: 1919
Creator: United States. Fuel Administration.
Partner: UNT Libraries Government Documents Department

Hydropower: Federal and Nonfederal Investment

Description: This report explains how the federal government is involved directly in hydropower generation at federal facilities and in the regulation of nonfederal hydropower generation; the focus is on current roles and processes and common concerns and questions about changing those roles.
Date: July 7, 2015
Creator: Bracmort, Kelsi; Vann, Adam & Stern, Charles V.
Partner: UNT Libraries Government Documents Department

Electric Power Transmission: Background and Policy Issues

Description: This report discusses electric power transmission and related policy issues. Transmission is a prominent federal issue because of a perceived need to improve reliability and reduce costs, transmission's role in meeting national energy goals (such as increased use of renewable electricity), and the potential efficiency advantages of "smart grid" modernization.
Date: April 14, 2009
Creator: Kaplan, Stan M.
Partner: UNT Libraries Government Documents Department

Hydropower: Federal and Nonfederal Investment

Description: This report discusses the changing energy and economic landscape, as well as the roughly 25 bills introduced by the 112th Congress regarding hydropower (the use of flowing water to produce electricity). Congress is examining numerous energy sources to determine their contribution to the nation's energy portfolio and the federal role in supporting these sources, including hydropower.
Date: June 26, 2012
Creator: Bracmort, Kelsi; Stern, Charles V. & Vann, Adam
Partner: UNT Libraries Government Documents Department

Cooling Water Intake Structures: Summary of EPA's Proposed Rule

Description: This report looks at the environmental impact of using water to absorb the heat from thermoelectric generating plants and manufacturing facilities during their industrial processes. The issue for Congress has been whether a stringent and costly environmental mandate could jeopardize reliability of electricity supply in the United States.
Date: June 12, 2012
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department

Effect of several methods of increasing knock-limited power on cylinder temperatures

Description: Report presenting a study to determine the effect of several methods of increasing the knock-limited power on critical cylinder temperatures. The knock-limited indicated horsepower and cylinder temperatures were determined for a Wright R-2600-8 cylinder under specified operating conditions. The most satisfactory method of increasing knock limited power was found to be internal cooling with water and the least satisfacotry was increasing the engine speed.
Date: September 1944
Creator: Cook, Harvey A.; Vandeman, Jack E. & Brown, Kenneth D.
Partner: UNT Libraries Government Documents Department

Nuclear Power Plant Security and Vulnerabilities

Description: This report discusses the physical security at nuclear power plants and concerns of radiological sabotage, a deliberate act against a plant that could directly or indirectly endanger public health and safety through exposure to radiation.
Date: January 3, 2014
Creator: Holt, Mark & Andrews, Anthony
Partner: UNT Libraries Government Documents Department

Hydropower: Federal and Nonfederal Investment

Description: This report explains how the federal government is involved directly in hydropower generation at federal facilities and in the regulation of nonfederal hydropower generation; the focus is on current roles and processes and common concerns and questions about changing those roles.
Date: January 22, 2013
Creator: Bracmort, Kelsi; Stern, Charles V. & Vann, Adam
Partner: UNT Libraries Government Documents Department

Power Sources for Remote Arctic Applications

Description: This background paper concludes that continued use of the radioisotope thermoelectric generators (RTGs) at Burnt Mountain entails low risk for the safety of maintenance workers and local populations and for the environment.
Date: June 1994
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department