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Side-by-Side Comparisons of Evacuated Compound Parabolic Concentrator and Flat Plate Solar Collector Systems

Description: Three liquid-based solar heating systems employing different types of solar collectors were tested side by side near Chicago, Illinois for one year. The three different types of collectors were: (1) a flat plate collector with a black-chrome coated absorber plate and one low-iron glass cover; (2) an evacuated-tube compound parabolic concentrator (CPC) with a concentration ratio of 1.1, oriented with tubes and troughs along a north-south axis; and (3) an evacuated-tube CPC collector with a conce… more
Date: October 1983
Creator: McGarity, Arthur E.; Allen, John W. & Schertz, William W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Solar District-Heating System Using Seasonal Storage for the Charlestown, Boston Navy Yard Redevelopment Project

Description: A preliminary analysis is presented for a seasonal storage solar heating system for the Charlestown Navy Yard in Boston, Massachusetts. The area occupies a prominent location in the Boston Harbor and is being redeveloped for residential and commercial use. The system makes use of two large, buried concrete storage tanks totaling 5700 cubic meters as a water heat store. Other storage facilities, including a dry dock, offer additional solar opportunities for the navy Yard as the redevelopment pro… more
Date: September 1982
Creator: Breger, Dwayne
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Life-Cycle Costing: A Guide for Selecting Energy Conservation Projects for Public Buildings

Description: Report issued by the Bureau of Standards discussing the energy conservation of public buildings. As stated in the introduction, "this report focuses on the establishment of a technically correct, practical, standardized approach for evaluating proposed energy conservation improvements in public buildings" (p. 2). This report includes tables, illustrations, and photographs.
Date: September 1978
Creator: Ruegg, Rosalie T.; McConnaughey, John S.; Sav, G. Thomas & Hockenbery, Kimberly A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Applications of Waveguide and Circuit Theory to the Development of Accurate Microwave Measurement Methods and Standards

Description: Report issued by the Bureau of Standards over "the basic theory and analytical methods used in the development of accurate microwave measurement methods and standards" (p. x). These methods are presented and discussed. This report includes tables, illustrations, and photographs.
Date: August 1973
Creator: Beatty, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Efficiency pf Multiple Traversal Targets

Description: The efficiency of multiple traversal targets is defined as the probability that a proton dies by making a nuclear collision in the target rather than by hitting the limit of the synchrotron aperture. The efficiencies of Be, Al, Cu, and Pb targets are shown for 15 and 30-Bev protons in the Brooknaven AGS. Beryllium was found to be the most efficient. (M.C.G.)
Date: February 5, 1962
Creator: Courant, E.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Possible Use of a Betatron Core on the Cosmotron

Description: Most existing electron synchrotrons use betatron start for initial acceleration of the particles. The subsequent synchrotron acceleration is then performed with a nearly constant radio-frequency. Investigation of the effect of turn-on rate and initial energy spread is made mathematically. Several advantages are seen for such a technique. (D.C.W.)
Date: January 18, 1962
Creator: Smith, L. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Torque-speed characteristics for high-specific-work turbines

Description: Report presenting an investigation of turbine torque-speed characteristics in a general form using the ideal specific work output corresponding to the turbine static- to total-pressure ratio as the normalizing parameter. The characteristics are first obtained using reference single-, two-, and three-stage analytical efficiency curves in the high-specific-work turbine operating range.
Date: September 1958
Creator: Stewart, Warner L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of efficiency characteristics of a single-stage turbine with downstream stators in terms of work and speed requirements

Description: One-dimensional mean-section flow and blade specific losses proportional to average specific kinetic energy are assumed in the analysis. Range of the work-speed parameter lambda considered includes low to moderate blade speeds with high specific work outputs, where critical turbojet, turbopump, and accessory-drive turbines are encountered. A diffusion factor of 0.5 limits the loading on the downstream stators. Turbine efficiences considered are total or aerodynamic, rating, and static. Efficien… more
Date: January 23, 1957
Creator: Wintucky, William T. & Stewart, Warner L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of burner design variables on performance of 16-inch diameter ram-jet combustor using gaseous-hydrogen fuel

Description: An evaluation of the effect of geometric design variables on the performance of a 16-inch-diameter ram-jet combustor total pressures from 7 to 44 inches of mercury absolute. Equivalent ratio was varied from 0.1 to 1.0 at a combustor inlet temperature of 1100 degrees R.
Date: January 18, 1957
Creator: Krull, H. George & Burley, Richard R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Blade-Section Camber on Aerodynamic Characteristics of Full-Scale Supersonic-Type Propellers at Mach Numbers to 1.04

Description: Report presenting an investigation of the aerodynamic characteristics of two full-scale supersonic propellers with a 6000-horsepower propeller dynamometer. One propeller had symmetrical NACA 16-series airfoil sections and the other was similar except for a blade-section camber and a slight difference in pitch distribution.
Date: October 19, 1956
Creator: Maynard, Julian D.; Swihart, John M. & Norton, Harry T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A theoretical study of the lifting efficiency at supersonic speeds of wings utilizing indirect lift induced by vertical surfaces

Description: Report presenting a theoretical study of the possibility of improving the lifting efficiency of aircraft flying at supersonic speeds using indirect lift, which can be induced on the wing by the fuselage shape and/or wing end plates. Results indicated that lifting efficiency of a planar wing may be improved by favorable interference induced by lateral forces on the end plates or on the sides of the fuselage.
Date: March 26, 1956
Creator: Rossow, Vernon J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Evaluation of Gaseous Hydrocarbon Fuel in a 16-Inch-Diameter Ram-Jet Engine

Description: Report presenting a determination of the combustion efficiency of gaseous hydrogen fuel in a ramjet engine in a connected-pipe test facility. Operating conditions simulated a range of Mach numbers and altitudes. Results regarding the effect of inlet parameters and design variables on combustion efficiencies, comparison between methods of determining efficiency, and ignition characteristics are provided.
Date: March 6, 1956
Creator: Dangle, E. E. & Kerslake, William R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Flame Photometric Determination of Tributylphosphate

Description: The study of the flame photometric method for determining the concentration of tributylphosphate (TBP) in a hydrocarbon diluent was undertaken because it showed promise of being economically competitive and subject to fewer interferences than the existing methods. The determination of TBP in the hydrocarbon solutions throughout the range 0.01 to 80 per cent TBP may be performed using the flame photometer. The principal conclusions resulting from the study found a that there was higher precision… more
Date: December 15, 1954
Creator: Brite, D. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of immersed surfaces in combustion zone on efficiency and stability of 5-inch diameter ram-jet combustor

Description: Report presenting an extension of previous work on immersed surfaces in the combustion zone of a ramjet engine. The primary focus was to determine the effect of combustion efficiency and stability of blades located within the immediate wake of a V-gutter flame holder and to find some location and orientation of blades for optimum combustion efficiency and improved stability limits with a minimum of pressure loss.
Date: June 21, 1954
Creator: Reynolds, Thaine W. & Male, Donald W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Combustion-efficiency and altitude-limit investigations of five fuels in an annular turbojet combustor

Description: Report presenting five fuels of boiling temperatures and several hydrocarbon types in a jet-propulsion annular combustor to determine the effect of fuel boiling temperature and paraffinic and aromatic hydrocarbon types on combustion efficiency and altitude operational limit. At the severe inlet-air condition, the highest combustion efficiencies were obtained with the paraffinic and aromatic fuels with low boiling temperatures were found to vary from 30 to 58 percent.
Date: June 7, 1954
Creator: Wear, Jerrold D. & Jonash, Edmund R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Nozzle Secondary Flows on Turbine Performance as Indicated by Exit Surveys of a Rotor

Description: Report presenting detailed circumferential and radial surveys of total pressure and total temperature made downstream of the turbine rotor of a high-speed, high-specific-mass-flow turbine at design operating conditions. The purpose of this testing was to determine the sources and magnitudes of losses in turbines. Results regarding total pressure ratio, total-temperature-drop ratio, contours of efficiency, and location of the losses are provided.
Date: April 5, 1954
Creator: Whitney, Warren J.; Buckner, Howard A., Jr. & Monroe, Daniel E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Inlet-Air Temperature on Performance of a 16-Inch Ram-Jet Combustor

Description: Report presenting an investigation of the effect of inlet-air temperature on the combustion efficiency of a 16-inch ram-jet engine in a connected-pipe installation. The engine was operated over a range of fuel-air ratios with several different combustor configurations and two fuel types. Configurations tested included a sloping baffle and a can-type combustor in three configurations.
Date: October 29, 1953
Creator: Cervenka, A. J.; Dangle, E. E. & Friedman, Robert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Occurrence and Control of Radioactive Entrainment in Evaporative Systems

Description: A study has been made of entrainment generation in a submerged coil evaporator and a vertical-tube natural circulation evaporator. Both evaporators generated about the same amount of entrainment at comparable boil-up rates. The decontamination efficiency of a submerged coil evaporator is correlated to the boil-up rate. The efficiency of a bubble-cap column, a Raschig ring packed tower, and a glass wool packed tower as de-entrainment devices was studied, the glass wool packed tower proving to be… more
Date: October 1953
Creator: Menowitz, B.; Bretton, R. H. & Horrigan, R. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of design changes and operating conditions on combustion and operational performance of a 28-inch diameter ram-jet engine

Description: The results of an altitude test-chamber investigation of the effects of a number of design changes and operating conditions on altitude peformance of a 28-inch diameter ram jet engine are presented. Most of the investigation was for a simulated flight Mach number of 2.0 above the tropopause. Fuel-air distribution, gutter width, the presence of a pilot flame, cimbustion-chamber-inlet temperature, and exhaust-nozzle throat area were found to have significant effects on limits of combustion. Combu… more
Date: February 13, 1952
Creator: Shillito, T. B. & Nakanishi, Shigeo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Altitude performance of annular combustor type turbojet engine with JFC-2 fuel

Description: An investigation was made comparing the performance of JFC-2 fuel and unleaded, clear gasoline in a 3000-pound-thrust turbojet engine. The JFC-2 fuel was a blend of percent diesel fuel and 25 percent aviation gasoline. Engine combustion efficiency was equal to that obtained with gasoline at rated engine speed and altitudes up to 35,000 feet, but at lower engine speeds or at higher altitudes the JFC-2 fuel gave lower combustion efficiency. No discernible difference was obtained in starting or lo… more
Date: February 5, 1952
Creator: Useller, James W.; Harp, James L., Jr. & Barson, Zelmar
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Altitude Test Chamber Investigation of Performance of a 28-Inch Ram-Jet Engine 2: Effects of Gutter Width and Blocked Area on Operating Range and Combustion Efficiency

Description: Altitude-test-chamber investigation of effects of flame-holder blocked area and gutter width on performance of 28-inch diameter ram jet at simulated flight Mach number of 2.0 for altitudes from 40,000 to 55,000 feet was conducted at NACA Lewis laboratory. Ten flame holders investigated covered gutter widths from 1.00 to 2.50 inches and blocked areas from 40.5 to 62.0 percent of combustion-chamber area. Gutter width did not appreciably affect combustion efficiency.
Date: November 6, 1950
Creator: Shillito, T. B.; Jones, W. L. & Kahn, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Turbojet combustion efficiency at high altitudes

Description: Report presenting research on the single problem of combustion efficiency of turbojet engines at high altitudes. Representative results of investigations with turbojet combustors are presented to analyze trends regarding combustor operating variables, combustor-design variables, and fuel variables.
Date: October 27, 1950
Creator: Olson, Walter T.; Childs, J. Howard & Jonash, Edmund R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary correlation of efficiency of aircraft gas-turbine combustors for different operating conditions

Description: Report presenting a correlation of combustion-efficiency data obtained in experimental investigations with 14 aircraft gas-turbine combustors. The precision is not good for some combustors, but can help in predicting the efficiency at different operating conditions and in comparing the performance of different combustors from data obtained in unrelated tests.
Date: September 21, 1950
Creator: Childs, J. Howard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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