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Assessment of research and development (R and D) needs in ammonia safety and environmental control

Description: This report characterizes the ammonia industry operations, reviews current knowledge of ammonia release and subsequent impacts, summarizes the status of release prevention and control methods and identify research and development needs for safety and environmental control. Appendices include: accidental spills and human exposure; adiabatic mixing of liquid nitrogen and air; fire and explosion hazards; and environmental impact rating tables. (PSB)
Date: September 1, 1981
Creator: Brenchley, D.L.; Athey, G.F. & Bomelburg, H.J.
Partner: UNT Libraries Government Documents Department
open access

Note on the cryostatic stability of superconducting composites

Description: A careful discussion is given of the ''equal area condition'' developed by Maddock et al. In order to make the essential points as clear as possible, analytical solutions are derived under simplifying assumptions (simple model for heat transfer by nucleate and film boiling liquid helium; constant heat conduction and specific heat) instead of using more realistic but less controllable computer calculations. A quantitative definition of the concept of a long wire is given. Num… more
Date: February 1, 1978
Creator: Gauster, W. F.
Partner: UNT Libraries Government Documents Department
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Comprehensive energy-management program. Hybrid photovoltaic/thermal absorber. Annual report, September 1, 1980-December 31, 1981

Description: Research work was done during the reporting period on the two-part research program: (A) to improve energy conservation through increased unit and system efficiencies, energy management, and system optimization, and (B) to develop a novel, low-cost hybrid photovoltaic/thermal absorber. Performance tests were conducted on all the boilers and chillers on campus. Several corrective measures were indicated and implemented. A detailed survey of energy use by functions and consumption/demand study ha… more
Date: December 1, 1981
Creator: Kumar, G. N.; Sellers, J. P. & Dybczak, Z. W.
Partner: UNT Libraries Government Documents Department
open access

Development of a computer program for reactor core thermal hydraulics: finite differencing in a 3-D staggered mesh suitable for irregular boundary applications

Description: A formulation utilizing a finite difference scheme for the direct numerical simulation of time varying two-phase flow problems in three space dimensions with irregular boundary geometry is presented. The formulation of such problems introduces a complicated set of coupled non-linear partial differential equations for the conservation of mass, momentum, energy, appropriate constitutive equations, and equations of state coupling the two phases. Discretization of the partial differential equations… more
Date: unknown
Creator: Sha, W.T.
Partner: UNT Libraries Government Documents Department
open access

Final Report of Modeling of CWM Droplet Combustion

Description: The objective of the present study was to develop a one-dimensional, unsteady state model for coal-water mixture droplet combustion, and to compare the characteristic times for the various processes, such as water vaporization, devolatilization and char oxidation with available experimental data. A water film surrounding a spherical coal particle is considered to undergo vaporization by heat transfer from the hot air. After the water vaporization is complete, devolatilization begins. This proce… more
Date: October 1, 1983
Creator: Pandalai, Krish; Aggarwal, Suresh & Sirignano, William
Partner: UNT Libraries Government Documents Department
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SCORE-EVET: a computer code for the multidimensional transient thermal-hydraulic analysis of nuclear fuel rod arrays. [BWR; PWR]

Description: The SCORE-EVET code was developed to study multidimensional transient fluid flow in nuclear reactor fuel rod arrays. The conservation equations used were derived by volume averaging the transient compressible three-dimensional local continuum equations in Cartesian coordinates. No assumptions associated with subchannel flow have been incorporated into the derivation of the conservation equations. In addition to the three-dimensional fluid flow equations, the SCORE-EVET code ocntains: (a) a one-… more
Date: February 1, 1978
Creator: Benedetti, R. L.; Lords, L. V. & Kiser, D. M.
Partner: UNT Libraries Government Documents Department
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Optical properties of flyash

Description: The general aims of this research are to provide a fundamental scientific basis for the physical understanding and reliable calculation of heat transfer in coal combustion systems, particularly as it is influenced by the presence of inorganic constituents deriving from mineral matter in coal. (VC)
Date: April 1, 1992
Creator: Self, S.A.
Partner: UNT Libraries Government Documents Department
open access

The collaborative program of research in engineering sciences

Description: Research programs in the following areas are briefly described: High-Temperature Gas-Particle Reactions; Mathematical Modelling of Plasma Systems; Metal Transfer in Gas Metal-Arc Welding; Multivariable Control of Gas Metal-Arc Welding; Synthesis of Heat and Work Integration Systems for Chemical Process Plants; Parity Simulation of Dynamic Processes; Fundamentals of Elastic-Plastic Fracture: Three-Dimensional and Mechanistic Modelling; and Comminution of Energy Materials. Publications from each … more
Date: August 1, 1989
Creator: White, D.C.
Partner: UNT Libraries Government Documents Department
open access

COBRA-WC: a version of COBRA for single-phase multiassembly thermal hydraulic transient analysis. [LMFBR]

Description: The objective of this report is to provide the user of the COBRA-WC (Whole Core) code a basic understanding of the code operation and capabilities. Included in this manual are the equations solved and the assumptions made in their derivations, a general description of the code capabilities, an explanation of the numerical algorithms used to solve the equations, and input instructions for using the code. Also, the auxiliary programs GEOM and SPECSET are described and input instructions for each … more
Date: July 1, 1980
Creator: George, T. L.; Basehore, K. L.; Wheeler, C. L.; Prather, W. A. & Masterson, R. E.
Partner: UNT Libraries Government Documents Department
open access

Utilization of coal-water fuels in fire-tube boilers

Description: This project is a demonstration for firing coal-water slurry in a fire-tube boiler. It includes design, installation, and demonstration of the slurry firing equipment in a fire-tube boiler at the University of Alabama in Tuscaloosa. The project will be funded by the US Department of Energy with cost sharing from Jim Walter Resources and the University of Alabama. Energy and Environmental Research Corporation is the prime contractor responsible for all respects of the project. The specific objec… more
Date: January 1, 1991
Creator: Sommer, T. & Melick, T.
Partner: UNT Libraries Government Documents Department
open access

Thermal energy storage for power generation

Description: Studies strongly indicate that the United States will face widespread electrical power constraints in the 1990s, with most regions of the country experiencing capacity shortages by the year 2000. In many cases, the demand for increased power will occur during intermediate and peak demand periods. Much of this demand is expected to be met by oil- and natural gas-fired Brayton cycle turbines and combined-cycle plants. While natural gas is currently plentiful and reasonably priced, the availabilit… more
Date: October 1, 1989
Creator: Drost, M. K.; Antoniak, Z. I.; Brown, D. R. & Sathyanarayana, K.
Partner: UNT Libraries Government Documents Department
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Continuing development of the DEROB system. Quarterly report, July 1, 1980-September 30, 1980

Description: The last module of the DEROB System has been reprogrammed and recoded in an effort to reduce the computational time and cost associated with using DEROB. Some preliminary tests have been carried out on the new program, and the tentative results show that the time of execution can be reduced anywhere from 7% to 40% of the time required by the previous version of DEROB. The variability in the improvement arises from the options specified by the user. Additional tests are being carried out to debu… more
Date: October 1, 1980
Creator: Arumi-Noe, F
Partner: UNT Libraries Government Documents Department
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FLOWTRAN benchmarking with onset of flow instability data from 1988 Columbia University single-tube OFI experiment

Description: Benchmarking FLOWTRAN, Version 16.2, with an Onset of Significant Voiding (OSV) criterion against measured Onset of Flow Instability (OFI) data from the 1988--89 Columbia University downflow tests has shown that FLOWTRAN with OSV is a conservative OFI predictor. Calculated limiting flow rates based on the Savannah River Site (SRS) OSV criterion were always higher than the measured flow rates at OFI. This work supplements recent FLOWTRAN benchmarking against 1963 downflow tests at Columbia Unive… more
Date: June 1, 1990
Creator: Chen, K.; Paul, P. K. & Barbour, K. L.
Partner: UNT Libraries Government Documents Department
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Feasibility demonstration of the Sperry down-well pumping system. Final report

Description: Advantages of down-well pumping (vs. free-flowing) of geothermal hot-water wells are presented, and criteria for such a system are discussed. The main body of the report is presented under the following section headings: the Sperry down-well pumping system; field test program; field operations; test results; and, conclusions and recommendations. The appendix includes a summary of boiler heat transfer and pressure drop calculations. (JGB)
Date: May 1, 1977
Partner: UNT Libraries Government Documents Department
open access

Effects of catalytic mineral matter on CO/CO sub 2 , temperature and burning time for char combustion

Description: The temperature of a char particle burning in an oxygen containing atmosphere is the product of a strongly coupled balance between particle size and physical properties, heat transfer from the particle, surface reactivity, CO/CO{sub 2} ratio and gas phase diffusion in the surrounding boundary layer and within the particle. CO{sub 2}/CO ratios can be strongly influenced by catalytic material in the carbon and by the char temperature. In this program we are measuring the CO{sub 2}/CO ratio for bo… more
Date: May 4, 1992
Creator: Longwell, J. P.; Sarofim, A. F.; Lee, Chun-Hyuk & Modestino, A. J.
Partner: UNT Libraries Government Documents Department
open access

One-dimensional code to predict the thermal behavior of the UTSI MHD radiant furnace

Description: An analytical model of the thermal behavior of the radiant furnace components installed in the CFFF has been developed. Efforts have been primarily directed towards obtaining a representative global evaluation of the heat recovery of the major downstream components. An overall review of the heat transfer code developed specifically for the DOE CFFF downstream components is presented. The basic methods by which the gas state, transport properties, and the thermal radiative and convective propert… more
Date: March 1, 1984
Creator: Galanga, F.L.
Partner: UNT Libraries Government Documents Department
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Comparison of solar pond concepts for electrical power generation

Description: The objectives of this study were to: (1) Identify the various solar pond concepts for electric power generation, including but not limited to: (a) nonconvective salt gradient solar pond, (b) ponds with various plastic or other membranes at suitable locations to minimize or eliminate convection, (c) ponds which are totally or partially gelled to reduce or eliminate convection, and (d) shallow convecting ponds; (2) analyze and compare the performance of these various concepts; and (3) estimate t… more
Date: October 1, 1975
Creator: Drumheller, K.; Duffy, J. B.; Harling, O. K.; Knutsen, C. A.; McKinnon, M. A.; Peterson, P. L. et al.
Partner: UNT Libraries Government Documents Department
open access

Thin polymer icemaker development and test program

Description: We have constructed and tested a small device to produce ice in ice/water mixtures using a cold fluid as the heat sink. The device is a flexible heat exchanger constructed from a thin film of a suitable polymer. When filled with circulating liquid coolant the heat exchanger consists of an inflated series of parallel tubes; ice forms on the outside in complementary half cylinders. When the circulation is cut off, gravity drains the coolant and the static head of the water bath crushes the tubes,… more
Date: August 1, 1991
Creator: Leigh, R.W. (Pratt Inst., Brooklyn, NY (United States))
Partner: UNT Libraries Government Documents Department
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