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Design and Installation Manual for Thermal Energy Storage, Second Edition

Description: The second addition is a substantial revision of the original work. A new chapter on latent heat storage, an appendix on units and conversions, and an index have been added. The purpose for this manual is to provide information on the design and installation of thermal energy storage in solar heating systems. It is intended for contractors, installers, solar system designers, engineers, architects, and manufacturers who intend to enter the solar energy business. The reader should have general knowledge of how solar heating systems operate and knowledge of construction methods and building codes. Knowledge of solar analysis methods such as f-chart, SOLCOST, DOE-1, or TRNSYS would be helpful. The information contained in the manual includes sizing storage, choosing a location for the storage device, and insulation requirements. Both air-based and liquid-based systems are covered with topics on designing rock beds, tank types, pump and fan selection, installation, costs, and operation and maintenance. Topics relevant to latent heat storage include properties of phase-change materials, sizing the storage unit, insulating the storage unit, available systems, and cost. Topics relevant to heating domestic water include safety, single- and dual-tank systems, domestic water heating with air- and liquid-based space heating systems, and stand alone domestic hot water systems. Several appendices present common problems with storage systems and their solutions, heat transfer fluid properties, economic insulation thickness, heat exchanger sizing, and sample specifications for heat exchangers, wooden rock bins, steel tanks, concrete tanks, and fiberglass-reinforced plastic tanks.
Date: January 1980
Creator: Cole, Roger Lynn; Nield, Kenneth J.; Rohde, Raymond R. & Wolosewicz, R. M.
Partner: UNT Libraries Government Documents Department

Winter Fuels Outlook 2010-2011

Description: This report discusses findings gleaned through the Energy Information Administration's (EIA) publication titled Short-Term Energy and Winter Fuels Outlook (STEWFO) for the 2010-2011 winter heating season. STEWFO projects how much American consumers should expect to see heating expenditures rise during the 2010-2011 winter season. These findings take into account the currently slow economic growth, high unemployment numbers, and uncertainty regarding the federal funding of the Low Income Energy Assistance Program (LIHEAP).
Date: October 29, 2010
Creator: Pirog, Robert
Partner: UNT Libraries Government Documents Department

An analysis of supersonic aerodynamic heating with continuous fluid injection

Description: From Introduction: "The aerodynamic heating problem assumes considerable importance at high-supersonic speeds. Sanger and Bredt (reference 1) have calculated the high-speed aerodynamic forces and equilibrium surface temperature at extremely high altitudes where the molecular mean free path is large (free-molecule-flow region) compared with a characteristic body dimension. The theoretical investigation of Lees (reference 2) on the stability of the laminar boundary layer in compressible flow indicates that the laminar boundary layer is completely stable at all Reynolds numbers at supersonic speeds for a sufficiently low ratio of surface temperature to stream temperature."
Date: September 29, 1949
Creator: Klunker, E G & Ivey, H Reese
Partner: UNT Libraries Government Documents Department

Winter Fuels Markets

Description: This report analyzes the key factors affecting the various winter fuels markets, including consumption, production, reserves, and storage volumes.
Date: October 21, 2008
Creator: Pirog, Robert
Partner: UNT Libraries Government Documents Department

Theory of aircraft structural models subject to aerodynamic heating and external loads

Description: Report examining the problem of investigating the simultaneous effects of transient aerodynamic heating and external loads on aircraft structures for the purpose of determining the ability of the structure to withstand flight to supersonic speeds.
Date: September 1957
Creator: O'Sullivan, William J., Jr.
Partner: UNT Libraries Government Documents Department

Transient temperature distribution in a two-component semi-infinite composite slab of arbitrary materials subjected to aerodynamic heating with a discontinuous change in equilibrium temperature or heat-transfer coefficient

Description: Report presenting a solution to the transient temperature distribution in a semi-infinite two-component composite slab of arbitrary materials subjected to an instantaneous application of aerodynamic heating. Results regarding some general principles and an illustrative example are provided.
Date: September 1958
Creator: Trimpi, Robert L. & Jones, Robert A.
Partner: UNT Libraries Government Documents Department

Motion of a ballistic missile angularly misaligned with the flight path upon entering the atmosphere and its effect upon aerodynamic heating, aerodynamic loads, and miss distance

Description: From Summary: "An analysis is given of the oscillating motion of a ballistic missile which upon entering the atmosphere is angularly misaligned with respect to the flight path. The history of the motion for some example missiles is discussed from the point of view of the effect of the motion on the aerodynamic heating and loading. The miss distance at the target due to misalignment and to small accidental trim angles is treated. The stability problem is also discussed for the case where the missile is tumbling prior to atmospheric entry."
Date: October 1957
Creator: Allen, H. Julian
Partner: UNT Libraries Government Documents Department

Investigation of Effectiveness of Air-Heating a Hollow Steel Propeller for Protection Against Icing. 2: 50% Impartitioned Blades

Description: From Summary: "The icing protection afforded an internal air-heated propeller blade by radial partitioning at 50-percent chord to confine the heated air to the forward half of the blade was determined in the NACA Cleveland icing research tunnel. A modified production-model hollow steel propeller, was used for the investigation. Temperatures of the blade surfaces for several heating rates were measured under various tunnel icing conditions. Photographic observations of ice formations on blade surfaces and blade heat-exchanger effectiveness were obtained."
Date: May 1948
Creator: Perkins, Porter J. & Mulholland, Donald R.
Partner: UNT Libraries Government Documents Department

Measurements of total hemispherical emissivity of various oxidized metals at high temperature

Description: Report presenting the results of measurements of total hemispherical emissivity at high temperatures for various metals are presented together with a limited description of the equipment and procedures used. Results regarding stainless steel, mild steel, titanium alloy, titanium, copper, aluminum, molybdenum, and tantalum are provided.
Date: March 1958
Creator: Wade, William R.
Partner: UNT Libraries Government Documents Department

Experimental and theoretical determination of thermal stresses in a flat plate

Description: Report determining the thermal stresses induced in a flat, rectangular, 75S-T6 aluminum-alloy plate by nonuniform heating both experimentally and theoretically. Results regarding the temperature distribution, longitudinal direct stresses, shear stresses, transverse direct stresses, and agreement between theory and experiment are provided.
Date: August 1952
Creator: Heldenfels, Richard R. & Roberts, William M.
Partner: UNT Libraries Government Documents Department

The temperature of unheated bodies in a high-speed gas stream

Description: From Summary: "The present report deals with temperature measurements on cylinders of 0.2 to 3 millimeters diameter in longitudinal and transverse air flow at speeds of 100 to 300 meters per second. Within the explored test range, that is, the probable laminar boundary layer region, the temperature of the cylinders in axial flow is practically independent of the speed and in good agreement with Pohlhausen's theoretical values; Whereas, in transverse flow, cylinders of certain diameter manifest a close relationship with speed, the ratio of the temperature above the air of the body to the adiabatic stagnation temperature decreases with rising speed and then rises again from a Mach number of 0.6. The importance of this "specific temperature" of the body for heat-transfer studies at high speed is discussed."
Date: December 1941
Creator: Eckert, E. & Weise, W.
Partner: UNT Libraries Government Documents Department

Calculation of coupling to slow and fast waves in the LHRF from phased waveguide arrays

Description: A previously reported algorithm for solving the problem of coupling electromagnetic energy in the LHRF from a phased array of identical rectangular waveguides to a plane-stratified, magnetized cold plasma is numerically implemented. The resulting computer codes are sufficiently general to allow for an arbitrary number of waveguides with finite dimensions in both poloidal and toroidal directions, and are thus capable of computing coupling to both slow and fast waves in the plasma. Some of the details of the implementation and the extension of the algorithm to allow study of the Fourier spectrum of slow and fast waves launched by the array are discussed. Good agreement is found with previously reported, less general work for the slow wave launching case. The effect of phasing multirow arrays in the poloidal direction is studied, and an asymmetry between phasing 'up' and 'down' is found that persists in the case where the plasma adjacent to the array is uniform. A 4 x 3 array designed to launch fast waves of high phase velocity is studied. By using the optimal poloidal phasing, low reflection coefficients (absolute value of R/sup 2/ less than or equal to 20%) are found under some not unrealistic edge plasma conditions, but most of the input power is trapped in the outermost layer of the plasma. Implications of our results for fast wave current drive experiments are discussed.
Date: April 1, 1986
Creator: Pinsker, R.I.; Duvall, R.E.; Fortgang, C.M. & Colestock, P.L.
Partner: UNT Libraries Government Documents Department

Current in wave driven plasmas

Description: A theory for the generation of current in a toroidal plasma by radio-frequency waves is presented. The effect of an opposing electric field is included, allowing the case of time varying currents to be studied. The key quantities that characterize this regime are identified and numerically calculated. Circuit equations suitable for use in ray-tracing and transport codes are given.
Date: June 1, 1985
Creator: Karney, C.F.F. & Fisch, N.J.
Partner: UNT Libraries Government Documents Department

Comparison of tokamak burn cycle options

Description: Experimental confirmation of noninductive current drive has spawned a number of suggestions as to how this technique can be used to extend the fusion burn period and improve the reactor prospects of tokamaks. Several distinct burn cycles, which employ various combinations of Ohmic and noninductive current generation, are possible, and we will study their relative costs and benefits for both a commerical reactor as well as an INTOR-class device. We begin with a review of the burn cycle options.
Date: January 1, 1985
Creator: Ehst, D.A.; Brooks, J.N.; Cha, Y.; Evans, K. Jr.; Hassanein, A.M.; Kim, S. et al.
Partner: UNT Libraries Government Documents Department

The Northeast Home Heating Oil Reserve and the National Oilheat Research Alliance

Description: This report discusses the price of home heating oil in the Northeast. The Northeast demand for home heating oil has declined by 47% since 2000, from nearly 7 billion gallons to 3.6 billion gallons in 2011. The report provides detailed information regarding northeast home heating oil reserve and national Oilheat Research Alliance.
Date: September 19, 2013
Creator: Andrews, Anthony
Partner: UNT Libraries Government Documents Department

Improved Grindability of Taconite Ores by Microwave Heating

Description: The 11.S. Bureau of Mines has conducted studies to utilize rapid microwave heating to stress fracture ore samples. Iron ores containing hematite, magnetite, and goethite were subjected to microwave energy in batch operations at 3 kW and heated to average maximum temperatures between 840 and 940 *C. Standard Bond grindability tests showed that microwave heating reduced the work index of iron ores by 10 to 24 pct. In a microwave chamber designed to simulate a continuous throughput operation at 3 kW, the grindability of a tacon-te ore was improved by 13 pct at a bulk temperature of 197 *C. Because stress cracking occurred at a lower temperature, less energy was consumed. To further improve the economics of microwave fracturing, higher powers up to 16 kW were used to rapidly heat samples to relatively low temperatures in a continuous, belt-fed applicator. A significant improvement of grindability was obtained with a larger rod mill feed size in comparison to a minus 6-mesh Bond feed.
Date: 1995
Creator: Walkiewicz, John W.; Lindroth, David P. & Clark, Andrea E.
Partner: UNT Libraries Government Documents Department

Correlation of supersonic convective heat-transfer coefficients from measurements of the skin temperature of a parabolic body of revolution (NACA RM-10)

Description: Report presenting an evaluation of the local coefficients of convective heat transfer from skin temperature on the body of an NACA research missile. Aerodynamic heating has been recognized as a major problem in the design of supersonic aircraft and experimental data has been greatly sought after. Results regarding recovery factors, the equation for thermal conductance, air viscosity, and the heat transfer parameters are provided.
Date: March 1956
Creator: Chauvin, Leo T. & Demoraes, Carlos A.
Partner: UNT Libraries Government Documents Department