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System study of an MHD/gas turbine combined-cycle baseload power plant. HTGL report No. 134
The MHD/gas turbine combined-cycle system has been designed specifically for applications where the availability of cooling water is very limited. The base case systems which were studied consisted of an MHD plant with a gas turbine bottoming plant, and required no cooling water. The gas turbine plant uses only air as its working fluid and receives its energy input from the MHD exhaust gases by means of metal tube heat exchangers. In addition to the base case systems, vapor cycle variation systems were considered which included the addition of a vapor cycle bottoming plant to improve the thermal efficiency. These systems required a small amount of cooling water. The MHD/gas turbine systems were modeled with sufficient detail, using realistic component specifications and costs, so that the thermal and economic performance of the system could be accurately determined. Three cases of MHD/gas turbine systems were studied, with Case I being similar to an MHD/steam system so that a direct comparison of the performances could be made, with Case II being representative of a second generation MHD system, and with Case III considering oxygen enrichment for early commercial applications. The systems are nominally 800 MW/sub e/ to 1000 MW/sub e/ in size. …
Date:
August 1, 1981
Creator:
Annen, K.D.
Object Type:
Report
System:
The UNT Digital Library
Passive solar construction handbook
Many of the basic elements of passive solar design are reviewed. The unique design constraints presented in passive homes are introduced and many of the salient issues influencing design decisions are described briefly. Passive solar construction is described for each passive system type: direct gain, thermal storage wall, attached sunspace, thermal storage roof, and convective loop. For each system type, important design and construction issues are discussed and case studies illustrating designed and built examples of the system type are presented. Construction details are given and construction and thermal performance information is given for the materials used in collector components, storage components, and control components. Included are glazing materials, framing systems, caulking and sealants, concrete masonry, concrete, brick, shading, reflectors, and insulators. The Load Collector Ratio method for estimating passive system performance is appended, and other analysis methods are briefly summarized. (LEW)
Date:
August 1, 1981
Creator:
Levy, E.; Evans, D. & Gardstein, C.
Object Type:
Report
System:
The UNT Digital Library
Study of selected off-gases produced during the immobilization of nuclear wastes in the SYNROC process. Final report for year ended December 31, 1981. [Pollucite, CsAlSi/sub 2/O/sub 6/, and barium-cesium hollandite, (Ba,Cs)Al/sub 2/Ti/sub 6/O/sub 16/]
Calculation of possible off-gases expected during the fabrication of SYNROC showed that volatilization of cesium would be a significant problem. Samples of the cesium containing minerals pollucite, CsAlSi/sub 2/O/sub 6/, and barium-cesium hollandite, (Ba,Cs)Al/sub 2/Ti/sub 6/O/sub 16/, were prepared for vaporization studies. Fifteen vaporization runs were made with the hollandite samples. With dry air as the carrier gas, the vapor pressure of cesium over Ba/sub 0/ /sub 8/Cs/sub 0/ /sub 4/Al/sub 2/Ti/sub 6/O/sub 16/ was found to be about 1 x 10/sup -7/ atm at 1050/sup 0/C.
Date:
December 31, 1981
Creator:
Carpenter, J.H.
Object Type:
Report
System:
The UNT Digital Library
Electron interactions with polar molecules
A description is given of a number of the features of discrete and continuous spectra of electrons interacting with polar molecules. Attention is focused on the extent to which theoretical predictions concerning cross sections, resonances, and bound states are strongly influenced by the various approximations that are so ubiquitous in the treatment of such problems. Similarly, threshold scattering and photodetachment processes are examined for the case of weakly bound dipole states whose higher members overlap the continuum.
Date:
January 1, 1981
Creator:
Garrett, W. R.
Object Type:
Article
System:
The UNT Digital Library
Small-angle physics at ISABELLE
ISABELLE will be commissioned a few years after the anti p p colliders, whose plans and first results have been presented here. A look at the design goals for ISABELLE reveals that the two salient features offered in compensation for the later turn-on are high luminosity and (2 x 10/sup 5/-10/sup 6/mb/sup -1/sec/sup -1/) and the number of intersections available for physics. With expected Z/sup 0/ detection rates of in UA1, it is clear that all but the most rudimentary features of the standard picture will remain obscure until ISABELLE-like luminosity is available. Some nonstandard models will be hard to distinguish from the standard one until high statistics can be accumulated above the masses of the standard vector bosons. The availability of a relatively large number of intersections at ISABELLE means that there will be room for some highly specific setups which can capitalize on the high luminosity in high-precision or rare-process studies.
Date:
January 1, 1981
Creator:
Aronson, S.H.
Object Type:
Article
System:
The UNT Digital Library
Correlation theory applied to the static and dynamic properties of EuO and EuS
The paramagnetic scattering was recently measured for EuO. It was found that spin-wave-like excitations develop for wave vectors approaching the zone boundary. The spectrum was found to be well described by damped harmonic oscillators (also called the two-pole-approximation). This approximation was used previously in the correlation theory primarily to calculate static properties. Selfconsistent dynamic and static calculations have been performed for EuO, which is an ideal Heisenberg magnet with significant second nearest neighbor interaction (J/sub 2/ = J/sub 1/5). The two-pole approximation describes accurately the correlation range, the static susceptibility and the qualitative behavior of the dynamic properties (i.e., the wave vector at which peaks appear in the spectrum as a function of temperature). However, in order to also obtain the correct frequency scale it is necessary to use a cut-off of the spectrum at high frequencies, which cannot be seen experimentally, but which significantly influences the frequency moments. It was found that the finite J/sub 2/ has significant importance for a comparison between theory and experiment. It is concluded that the calculation for a simple cubic n.n. magnet by Hubbard does not describe the EuO data accurately, neither with respect to lineshape nor frequency scale. Significant differences are to …
Date:
October 1, 1981
Creator:
Lindgard, P.A.
Object Type:
Article
System:
The UNT Digital Library
Noncanonical Hamiltonian methods in plasma dynamics
A Hamiltonian approach to plasma dynamics has numerous advantages over equivalent formulations which ignore the underlying Hamiltonian structure. In addition to achieving a deeper understanding of processes, Hamiltonian methods yield concise expressions (such as the Kubo form for linear susceptibility), greatly shorten the length of calculations, expose relationships (such as between the ponderomotive Hamiltonian and the linear susceptibility), determine invariants in terms of symmetry operations, and cover situations of great generality. In addition, they yield the Poincare invariants, in particular Liouville volume and adiabatic actions.
Date:
November 1, 1981
Creator:
Kaufman, A. N.
Object Type:
Article
System:
The UNT Digital Library
National uranium resource evaluation program: hydrogeochemical and stream sediment reconnaissance basic data for Ely quadrangle, Nevada; Utah
Field and laboratory data are presented for 1937 sediment samples from the Ely Quadrangle, Nevada; Utah. The samples were collected by Savannah River Laboratory; laboratory analysis and data reporting were performed by the Uranium Resource Evaluation Project at Oak Ridge, Tennessee.
Date:
October 15, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Materials for coal conversion and utilization
The Sixth annual conference on materials for coal conversion and utilization was held October 13-15, 1981 at the National Bureau of Standards Gaithersburg, Maryland. It was sponsored by the US Department of Energy, the Electric Power Research Institute, the Gas Research Institute and the National Bureau of Standards. Fifty-eight papers from the proceedings have been entered individually into EDB and ERA; four papers had been entered previously from other sources. (LTN)
Date:
January 1, 1981
Creator:
None,
Object Type:
Article
System:
The UNT Digital Library
Characterization of Open-Cycle Coal-Fired MHD Generators. 16th Quarterly Technical Progress Report, December 16, 1980-March 31, 1981
The successful design of full-scale, open-cycle, coal-fired MHD generators for baseload electrical production requires a detailed understanding of the plasma chemical and plasma dynamic characteristics of anticipated combustor and channel fluids. Progress in efforts to model the efficiency of an open-cycle, coal-fired MHD channel based on the characterization of the channel flow as well as laboratory experiments to validate the modeling effort is reported. In addition, studies related to understanding arcing and corrosion phenomena in the vicinity of an anode are reported.
Date:
May 1, 1981
Creator:
Wormhoudt, J.; Yousefian, V.; Weinberg, M.; Kolb, C.; Martinez-Sanchez, M.; Cheng, W. et al.
Object Type:
Report
System:
The UNT Digital Library
Silicon solar-cell process: development, fabrication, and analysis. Tenth quarterly report, 1 July 1981-30 September 1981
Work has progressed in fabrication and characterization of solar cells from UCP wafers and LASS ribbons. Gettering tests applied to UCP wafers made little change on their performance compared with corresponding baseline data. Advanced processes such as SJ, BSF, and MLAR were also applied. While BSF by Al paste had shunting problems, cells with SJ and BSF by evaporated Al, and MLAR did achieve 14.1% AM1 on UCP silicon. The study of LASS material was very preliminary. Only a few cells with SJ, BSR, (no BSF) and MLAR were completed due to mechanical yield problems after lapping the material. Average efficiency was 10.7% AM1 with 13.4% AM1 for CZ controls. Relatively high minority carrier diffusion lengths were obtained. The lower than expected Jsc could be partially explained by low active area due to irregular sizes.
Date:
January 1, 1981
Creator:
Yoo, H.I.; Iles, P.A. & Leung, D.C.
Object Type:
Report
System:
The UNT Digital Library
Anti W comparisons for A150 plastic-equivalent gases, TE gas, and air
As part of our continuing evaluation of A150 plastic equivalent gases for neutron dosimetry, we have measured ionization ratios which are related to anti W ratios between gases in the p(66)Be(49) neutron beam at Fermilab. Additionally we have extended our earlier measurements (DeLuca, et al., 1980) at the UW gas target /sup 3/H(d,n)/sup 4/He neutron source to include an uncollimated beam geometry with ion chambers close to the target. Observed differences from the earlier results can probably be explained on the basis of neutron spectra, which await further determination.
Date:
January 1, 1981
Creator:
Pearson, D. W.; DeLuca Jr., P. M.; Schell, M. C.; Attix, F. H.; Awschalom, M.; Rosenberg, I. et al.
Object Type:
Report
System:
The UNT Digital Library
Energy and land use
This report addresses the land use impacts of past and future energy development and summarizes the major federal and state legislation which influences the potential land use impacts of energy facilities and can thus influence the locations and timing of energy development. In addition, this report describes and presents the data which are used to measure, and in some cases, predict the potential conflicts between energy development and alternative uses of the nation's land resources. The topics section of this report is divided into three parts. The first part describes the myriad of federal, state and local legislation which have a direct or indirect impact upon the use of land for energy development. The second part addresses the potential land use impacts associated with the extraction, conversion and combustion of energy resources, as well as the disposal of wastes generated by these processes. The third part discusses the conflicts that might arise between agriculture and energy development as projected under a number of DOE mid-term (1990) energy supply and demand scenarios.
Date:
December 1, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Production of titanium from ilmenite: a review
The general principles for beneficiation of titanium ores are reviewed and the specific processes used in individual units in various countries are discussed. This is followed by a critical evaluation of various current and potential reduction methods for the production of titanium metal from the processed concentrates. Finally, the report outlines a research program for the development of a commercially viable alternative method for the production of titanium metal.
Date:
December 1, 1981
Creator:
Kohli, R.
Object Type:
Report
System:
The UNT Digital Library
Comparison of methods for solving nonlinear finite-element equations in heat transfer
We have derived two new techniques for solving the finite-element heat-transfer equations with highly nonlinear boundary conditions and material properties. When compared with the more commonly employed successive substitution and Newton-Raphson procedures, the new methods speed convergence rates and simultaneously increase the radius of convergence. We have observed reductions in computation time in excess of 80% when the new techniques are employed. The first method accelerates the standard Newton-Raphson approach when the degree of the nonlinearity is known (for example, radiation boundary conditions or a prescribed temperature dependence in the thermal conductivity). The second technique employs feedback to regulate the solution algorithm during execution. Comparisons of these techniques are given for several practical examples.
Date:
January 1, 1981
Creator:
Cort, G. E.; Graham, A. L. & Johnson, N. L.
Object Type:
Article
System:
The UNT Digital Library
Analytical and experimental system studies of combined photovoltaic/thermal systems. Technical status report No. 12, February-March 1981
Progress in the photovoltaic/thermal (PV/T) research program is indicated on a Milestone Chart, and a monthly history of the funds expended is graphed. Technical progress includes computer simulation of crude oil dewatering process, a simplified technique for predicting long term collector performance, PV/T concentrator collector testing, and participation in national standards development. Appended are a paper describing the collector performance calculation technique, a description of the PV/T concentrator, and a report for testing PV/T collectors. (LEW)
Date:
1981-04~
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Probability of pipe fracture in the primary coolant loop of a PWR plant. Volume 9. PRAISE computer code user's manual. Load Combination Program Project I final report
The PRAISE (Piping Reliability Analysis Including Seismic Events) computer code estimates the influence of earthquakes on the probability of failure at a weld joint in the primary coolant system of a pressurized water reactor. Failure, either a through-wall defect (leak) or a complete pipe severance (a large-LOCA), is assumed to be caused by fatigue crack growth of an as-fabricated interior surface circumferential defect. These defects are assumed to be two-dimensional and semi-elliptical in shape. The distribution of initial crack sizes is a function of crack depth and aspect ratio. PRAISE treats the inter-arrival times of operating transients either as a constant or exponentially distributed according to observed or postulated rates. Leak rate and leak detection models are also included. The criterion for complete pipe severance is exceedance of a net section critical stress. Earthquakes of various intensity and arbitrary occurrence times can be modeled. PRAISE presently assumes that exactly one initial defect exists in the weld and that the earthquake of interest is the first earthquake experienced at the reactor. PRAISE has a very modular structure and can be tailored to a variety of crack growth and piping reliability problems. Although PRAISE was developed on a CDC-7600 computer, it was, …
Date:
June 1, 1981
Creator:
Lim, E.Y.
Object Type:
Report
System:
The UNT Digital Library
Assessment of pulverized-coal-fired combustor performance
During the fifth quarterly period of the program, efforts have continued to focus on the analytical tool development and verification task, and on the bench-scale experimental reactor studies for the screening of key combustion variables. In previous quarters, the selection, upgrading and verification of the required furnace heat transfer models have been reported. These models are now fully operational and have been used to complete a series of screening studies to identify those parameters which most significantly affect the thermal performance of combustion systems. In this present period, the multizone furnace heat transfer model has been further refined by the development of a separate but fully coupled submodel for the calculation of char burnout. This aspect of combustor performance is believed to be an important consideration in the conversion of furnaces to coal firing. Char burnout will not only impact the amount of unburned carbon at the stack, but will also affect local heat transfer levels through the extension of heat-release zones and modification of the properties of the radiating species. In the experimental portion of the program, efforts have focused on the modification of the reactor feed system and measurement techniques in order to alleviate problems leading to poor …
Date:
January 1, 1981
Creator:
Richter, W.; Clark, W. & Payne, R.
Object Type:
Report
System:
The UNT Digital Library
Americium purification by a combined anion exchange and bidentate organophosphorus solvent extraction process. [Patent application]
Americium is separated from mixtures containing plutonium, other actinides, and other non-lanthamide impurities, by a combined process of anion exchange resin sorption to remove plutonium, and a bidentate organophosphorus solvent extraction of americium of the anion exchange resin effluent. Dihexyl-N,N-diethylcarbamylmethylenephosphonate is a preferred solvent. The initial mixture may be subjected to a cation exchange operation to remove monovalent impurities. The process is especially effective when aluminum, zinc, lead, and copper are present in significant quantities in the original mixture.
Date:
April 10, 1981
Creator:
Navratil, J.D. & Martella, L.L.
Object Type:
Patent
System:
The UNT Digital Library
Walking Bells
Access:
Use of this item is restricted to the UNT Community
Recording of David Porter's Walking Bells for tape. The piece is a tour through an environmental/concrete landscape. It is another variation on the "cumulative form." This is the second in a series of four tape pieces. As with all these pieces, this piece comments on political and compositional methods and devices. In this instance, the piece makes reference to another composer whose style is borrowed. Other than that, it is pure experience. This piece should be listened to with speakers placed well apart and volume up the the highest comfortable level at the last two minutes of the piece.
Date:
1981
Creator:
Porter, David, 1953-
Object Type:
Sound
System:
The UNT Digital Library
Suiana Wanka
Access:
Use of this item is restricted to the UNT Community
Recording of Fernando Condon-Garcia's Suiana Wanka for tape. This work collects and develops independently the materials of a music scene for Peter Shafer work "The Royal Hunt of the Sun". It is based exclusively on sound recordings of various Latin American instruments such as the Indian flute, pincuyos, sicus, tarkas, mohecenos, various kinds of percussion, etc., to which are added, during some passages, instruments from European culture (organ, flute, bass). The original sound was made in a professional studio, and the final realization was made in ELAC, a small Montevideo studio, with the technical assistance of Carlos Da Silveira.
Date:
1981
Creator:
Condon, Fernando, 1955-
Object Type:
Sound
System:
The UNT Digital Library
Troisième doxologie Saint Sébastien
Access:
Use of this item is restricted to the UNT Community
Recording of Frank Royon Le Mée's "Troisième doxologie Saint Sébastien" ("Third Doxology Saint Sebastian"). The piece is an electronic postlude in three stanzas.
Date:
1981
Creator:
Royon Le Mée, Frank, 1953-1993
Object Type:
Sound
System:
The UNT Digital Library
St Henry's Tribe Memorial Anthem
Access:
Use of this item is restricted to the UNT Community
Recording of Jarmo Sermilä's "St Henry's Tribe Memorial Anthem" for tape.
Date:
1981
Creator:
Sermilä, Jarmo, 1939-
Object Type:
Sound
System:
The UNT Digital Library
6 electronic preludes
Access:
Use of this item is restricted to the UNT Community
Recording of Bohdan Mazurek's 6 electronic preludes for tape.
Date:
1981
Creator:
Mazurek, Bohdan
Object Type:
Sound
System:
The UNT Digital Library