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1,628 Matching Results
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Macro-encapsulation of heat storage phase-change materials for use in residential buildings. Final report, September 29, 1976-September 6, 1978
Objectives are to assess the feasibility of macro-encapsulated PCM's for residential solar systems, to develop and evaluate such materials. Encapsulant materials under consideration are multilayer flexible plastic films, steel cans, and plastic bottles. Studies were done in a storage test unit on: CaCl/sub 2/.6H/sub 2/O encapsulated in polyethylene bottles, Mg(NO/sub 3/)/sub 2/6H/sub 2/O in steel cans, Mg(NO/sub 3/)/sub 2/6H/sub 2/O/NH/sub 4/NO/sub 3/ eutectic encapsulated in flexible plastic film packages, NH/sub 4/Br/urea eutectic in polypropylene bottles, and a combined bed of CaCl/sub 2/.6H/sub 2/O and Mg(NO/sub 3/)/sub 2/6H/sub 2/O/NH/sub 4/NO/sub 3/ eutectic. In most cases, charge and discharge capacities in excess of 90% of theory were obtained. Several designs using encapsulated PCM were analyzed, one was selected, and preliminary designs were developed for a demonstration project.
Date:
November 1, 1978
Creator:
Lane, G. A.; Kott, A. C.; Warner, G. L.; Hartwick, P. B. & Rossow, H. E.
Object Type:
Report
System:
The UNT Digital Library
High geothermal energy utilization geothermal/fossil hybrid power cycle: a preliminary investigation
Combining geothermal and fossil fuel energy into the so-called hybrid cycle is compared with a state-of-the-art double-flash geothermal power cycle using resources which vary from 429/sup 0/K (312/sup 0/F) to 588/sup 0/K (598/sup 0/F). It is demonstrated that a hybrid plant can compete thermodynamically with the combined output from both a fossil-fired and a geothermal plant operating separately. Economic comparison of the hybrid and double-flash cycles is outlined, and results are presented that indicate the performance of marginal hydrothermal resources may be improved enough to compete with existing power cycles on a cost basis. It is also concluded that on a site-specific basis a hybrid cycle is capable of complementing double-flash cycles at large-capacity resources, and can operate in a cycling load mode at constant geothermal fluid flow rate.
Date:
November 1, 1978
Creator:
Grijalva, R. L. & Sanemitsu, S. K.
Object Type:
Report
System:
The UNT Digital Library
Critical experiments supporting close proximity water storage of power reactor fuel. Technical progress report, July 1, 1978-September 30, 1978
Experimental measurements are being taken on critical configurations of clusters of fuel rods mocking up LWR-type fuel elements in close proximity water storage. The results will serve to benchmark the computer codes used in designing nuclear power reactor fuel storage racks. KENO calculations of Cores I to VI are within two standard deviations of the measured k/sub eff/ values.
Date:
November 1, 1978
Creator:
Baldwin, M. N.; Hoovler, G. S.; Eng, R. L. & Welfare, F. G.
Object Type:
Report
System:
The UNT Digital Library
Hydrothermal alteration at the Roosevelt Hot Springs Thermal Area, Utah: modal mineralogy, and geochemistry of sericite, chlorite, and feldspar from altered rocks, Thermal Power Company well Utah State 14-2
Sericites, chlorites, feldspars, biotite and hornblende from hydrothermally altered rocks at several depths in Thermal Power Company well Utah State 14-2, Roosevelt Hot Springs Thermal Area, Utah, have been analyzed using the electron microprobe. Sericites and ferromagnesian minerals have been analyzed for 12 major elements, and feldspars for 3. The results have been used, along with whole rock chemical analyses, to computer calculate modal mineralogy for samples from the drillhole. Calculated modes for hydrothermal minerals are in reasonable agreement with observations from thin sections.
Date:
November 1, 1978
Creator:
Ballantyne, J.M.
Object Type:
Report
System:
The UNT Digital Library
Preconceptual design management plan basalt waste isolation program basalt repository
The repository in Columbia Plateau basalt will receive nuclear waste in canisters (spent fuel, HLW, and ILW) and drums (low-level waste). This document establishes the management plan for the preconceptual design of the basalt repository. (DLC)
Date:
November 10, 1978
Creator:
Marron, J.F.
Object Type:
Report
System:
The UNT Digital Library
Investigating the impact of drilling mud and its major components on bivalve species of Georges Bank
The objective of this program has been to measure the response of commercially important marine bivalve molluscs to low levels of drilling muds. Because these materials are composed of several major components whose proportions vary between wells and with depth for a single well, the approach of this study has been to test the major components individually and then to test a representative synthetic mud and finally a used drilling mud from an offshore platform. In all but one of these tests the target organism has been the sea scallop, Placopecten magellanicus.
Date:
November 1, 1978
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Electromagnetic exploration system. Progress report
A design for a cost effective, highly flexible, and portable controlled source EM exploration system is presented. The design goals of the CMOS micro-processor based receiver and its companion transmitter are listed. (MHR)
Date:
November 1, 1978
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Degradation of cellulosic biomass and its subsequent utilization for the production of chemical feedstocks. Progress report, September 1-November 30, 1978
Studies on the accumulation of glucose during the fermentation of cellulose by Clostridium thermocellum are discussed. Production of ethanol and its relationship to growth rate in C. thermocellum is reported. Different biomasses were tested for ethanol yields. These included exploded poplar, sugar cane, bagasse, corn cobs, sweet gum, rice straw, and wheat straw. Thermophilic bacteria were tested to determine relationship of temperature to yield of ethanol. A preliminary report on isolating plaque forming emits derived from C. thermocellum is presented as well as the utilization of carbohydrates in nutrition. A cellulose enzyme is being purified from C. thermocellum. The production of chemical feedstocks by fermentation is reported. Acrylic acid, acetone/butanol, and acetic acid, produced by C. propionicum, C. acetobutylicum, and C. thermoaceticum, are discussed. (DC)
Date:
November 1, 1978
Creator:
Wang, D. I.; Cooney, C. L.; Demain, A. L.; Gomez, R. F. & Sinskey, A. J.
Object Type:
Report
System:
The UNT Digital Library
Mercury in mussels of Bellingham Bay, Washington, (USA)
Laboratory experiments demonstrated the existence of metallothionein-like, low molecular weight, mercury-binding proteins in the marine mussel Mytilus edulis. Relatively large quantities of mercury were associated with such proteins in gills and digestive gland, the organs of interest in the present study. /sup 14/C-incorporation indicated induction of the protein in gills, but not in digestive gland. Mercury in digestive gland may have bound to existing metal-binding proteins. Short-term incorporation of mercury occurred primarily in gills. The induction of mercury-binding proteins in gills may have facilitated detoxification of mercury at the site of uptake. Mercury in mussels of Bellingham Bay were shown to have decreased from 1970 to 1978, the collection date for the present study. Mercury levels were low but approximately three times higher than those from uncontaminated areas. Mercury associated with the mercury-binding protein of gills and digestive glands of Bellingham Bay mussels were low and reflected the concentrations measured in the whole tissues. However, the highest concentration of mercury was associated with the low molecular pool components, the identity of which is not presently known.
Date:
November 1, 1978
Creator:
Roesijadi, G.; Drum, A.S. & Bridge, J.R.
Object Type:
Article
System:
The UNT Digital Library
Phase 2 of the Automated Array Assembly Task of the Low-Cost Silicon Solar Array Project: Annual Report
This report presents the results of investigations and analyses of an advanced process sequence for manufacturing high efficiency solar cells and modules in a cost-effective manner. The entire process sequence is presented and discussed step by step. Emphasis is on process simplicity and minimizing consumed materials. The process sequence incorporates texture etching, plasma processes for damage removal and patterning, ion implantation, low pressure silicon nitride deposition, and plated metal. A reliable module design is presented. Specific process step developments are presnted. Further, a detailed cost analysis has been performed to indicate future areas of fruitful cost reduction effort. Finally, recommendations for advanced investigations are presented.
Date:
November 1, 1978
Creator:
Coleman, M. G.; Grenon, L. P.; Pastirik, E. M.; Pryor, R. A. & Sparks, T. G.
Object Type:
Report
System:
The UNT Digital Library
In-reactor measurement of neutron absorber performance
An instrumented absorber experiment in the Experimental Breeder Reactor-II yielded data on the helium release of boron carbide at exposures up to 53 x 10/sup 20/ neutron captures/cm/sup 3/ and temperatures from 766 to 952/sup 0/C. Helium release results demonstrated a high rate of helium release initially, and a much lower rate in a secondary region. In addition, the experiment demonstrated the effectiveness of vents in releasing gas from a plenum during irradiation.
Date:
November 1, 1978
Creator:
Hollenberg, G. W.; Jackson, J. L. & Basmajian, J. A.
Object Type:
Article
System:
The UNT Digital Library
Department of Energy's Solar Update. Four Regional Conferences Highlighting the Objectives, Plans, and Experience of the National Commercial Solar Heating and Cooling Demonstration Program and the National Solar Data Program
This volume contains the entire proceedings of the solar update. All papers presented by DOE officials, DOE contractors, and demonstration site representatives are presented, as well as summaries of all workshops, comments from questionnaires, and a listing of all participants. Twenty-eight papers are included. Two were abstracted previously for EDB. Separate abstracts were prepared for twenty-six. (MHR)
Date:
November 1, 1978
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
Determination of floor response spectra for the Brookhaven HFBR reactor building structure
In order to perform the dynamic analysis of various structural components of the HFBR reactor building at Brookhaven National Laboratory (BNL) subjected to seismic disturbances, it is necessary to obtain the floor response spectra of the primary structure. The mathematical model includes the four floor levels of the internal structure, the dome, and soil spring effects. The standard time history analysis is adopted to obtain the response spectrum for each floor of the internal structure. This report summarizes the results both in tabular and graphical form for various damping values.
Date:
November 1, 1978
Creator:
Subudhi, M. & Goradia, H.
Object Type:
Report
System:
The UNT Digital Library
Design experience: FFTF shielding
The Fast Flux Test Facility is being built to serve as the primary test facility in the United States for the development of liquid-metal-cooled fast breeder reactors. Shield design philosophy for the reactor was to protect permanent structural members with removable or replaceable components. Significant studies were undertaken to establish the shield design in the reactor support area, to protect the core support structure, and to prevent excessive activation of secondary sodium. Equipment associated with each of the three heat transport system loops are contained in separate shielded cells to permit individual shutdown and isolation maintenance. Design-basis source strengths were calculated and dose rate criteria were established based on anticipated access requirements to provide a basis for the design of plant shields. High density concretes were employed in some walls because of physical contraints established by the limited size of the containment building. Extensive shield acceptance tests are planned to establish the radiation environment throughout the reactor and plant to assure satisfactory performance and for subsequent comparison with design values.
Date:
November 1, 1978
Creator:
Bunch, W. L.; Rathbun, J. L. & Swenson, L. D.
Object Type:
Article
System:
The UNT Digital Library
Analytical study of the dilation of fast reactor fuel assembly ducts
An analytic method is presented for determining the dilation of fast reactor fuel assembly ducts. For temperatures where creep is linearly dependent on stress, the method is rigorous in satisfying equilibrium, compatibility and stress-strain equations. Solutions are presented for two cases: (1) a duct with constant pressure differential, (2) a duct with varying pressure differential. Results are in close agreement with finite element results of the MARC-CDC program. The method is used to predict the dilation of the Fast Test Reactor (FTR) ducts under different operating conditions. Presented are the stress, strain and dilation predictions along the duct wall, and the duct dilation variations with its geometric and loading parameters.
Date:
November 15, 1978
Creator:
Chan, D. P. & Jackson, R. J.
Object Type:
Article
System:
The UNT Digital Library
Shielding materials. [LMFBR]
The higher neutron flux levels associated with fast reactors, when compared to thermal reactors of the same power, dictate the use of structural steels in the primary reactor shields and the need to design replaceable shield components. The loop-type reactor design being developed in the United States eliminates the need for graphite or other moderating material within the reactor vessel. Sufficient reactor shielding is employed to assure that permanent structural members retain mechanical characteristics comparable to unirradiated material. Removable or replaceable components are designed to retain specific required physical characteristics until replaced. The concretes and compensatory shields used throughout the fast reactor plant are quite similar to those employed in thermal reactor systems. High density concretes containing metallic ores and iron are used where space limitations dictate. Selection of compensatory shield materials is complicated by the diversity of the problems that exist and by the limited knowledge of the long-term behavior of some materials.
Date:
November 1, 1978
Creator:
Bunch, W. L. & Blackburn, L. D.
Object Type:
Article
System:
The UNT Digital Library
Effect of point defects on mechanical properties of metals. Technical progress report, January 1, 1978--November 30, 1978
Progress is reported on deformation behavior of niobium single crystals below 77/sup 0/K, the effect of electron irradiation on the deformation behavior of niobium single crystals, and surface film softening phenomenon in Ni plated iron single crystals. (FS)
Date:
November 1, 1978
Creator:
Meshii, M.
Object Type:
Report
System:
The UNT Digital Library
Analysis and evaluation of processes and equipment in Tasks II and IV of the Low-Cost Solar Array Project. Quarterly report, April-July 1978
The significant economic data for the current production multiblade wafering and inner diameter slicing processes were tabulated and compared to data on the experimental and projected Varian multiblade slurry, STC ID diamond coated blade, Yasunaga multiwire slurry and Crystal Systems fixed abrasive multiwire slicing methods. Cost calculations were performed for current production processes and for 1982 and 1986 projected wafering techniques.
Date:
November 1, 1978
Creator:
Goldman, H. & Wolf, M.
Object Type:
Report
System:
The UNT Digital Library
Assessment of the risk of transporting gasoline by truck
Based on shipping assumptions and the current accident rate of 2.5 x 10/sup -6/ per mile, it is estimated that gasoline tank trucks will be involved in 1,781 accidents in 1980, and that 110 of the accidents (about one in 15) will result in a release of 3,000 gallons of gasoline or more from the tank truck. About one in four of the releases are expected to result in a large fire. The estimated number of fatalities from the gasoline releases in 1980 is 29, with 12 of these fatalities being drivers of gasoline tank trucks, and the other 17 being occupants of other vehicles involved in the accident. Fatalities of other members of the public were found to occur infrequently. An additional 26 persons are expected to be fatally injured from the accident forces, regardless of the hazardous nature of the cargo. These total fatality figures (55) were compared to the prediction of 43 deaths of the Bureau of Motor Carrier Safety.
Date:
November 1, 1978
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
TMX magnet control system
A control system utilizing a microcomputer has been developed that controls the power supplies driving the Tandem Mirror Experiment (TMX) magnet set and monitors magnet coil operation. The magnet set consists of 18 magnet coils that are driven by 26 dc power supplies. There are two possible modes of operation with this system: a pulse mode where the coils are pulsed on for several seconds with a dc power consumption of 16 MW; and a continuous mode where the coils can run steady state at 10 percent of maximum current ratings. The processor has been given an active control role and serves as an interface between the operator and electronic circuitry that controls the magnet power supplies. This microcomputer also collects and processes data from many analog singal monitors in the coil circuits and numerous status signals from the supplies. Placing the microcomputer in an active control role has yielded a compact, cost effective system that simplifies the magnet system operation and has proven to be very reliable. This paper will describe the TMX magnet control sytem and discuss its development.
Date:
November 12, 1978
Creator:
Goerz, D.A.
Object Type:
Article
System:
The UNT Digital Library
Phase 2 of the array automated assembly task for the low cost silicon solar array project. Interim report
The LSA Automated Array Assembly Task has as its goal the manufacture of photovoltaic modules at a capacity of 500 MW per year at a cost of $0.50 per peak watt. Divided between ten solar cell manufacturers, each installation should produce 50 MW per year. This implies that automated machinery would continuously produce 120 solar cells per minute. The purpose of this report is to detail the processes and techniques which are believed to have great promise of accomplishing this task. The initial stages of the program were involved in studying the possibility of automated assembly. Phase 1 reviewed a large cross section of processes, conceptual designs, and innovative technologies in preparation for 1986. Through this documentation, a large amount of comprehensive data has been collected. It is these reports upon which the next phase of the program is based. The purpose of Phase 2 is to propose an automated sequence, verify it and present future cost projections. Utilizing the large amount of information available from Phase 1 and drawing from its own experience Solarex has proposed a process sequence which it is believed has great potential of achieving the LSA goals. This report describes the processes, details, the verification …
Date:
November 1, 1978
Creator:
Wihl, M.; Toro, J.; Scheinine, A. & Anderson, J.
Object Type:
Report
System:
The UNT Digital Library
Guidebook on integrated community energy systems: indirect economic and energy impacts
Integrated community energy systems represent combinations of innovative technologies, energy-conserving community designs, and appropriate financial and regulatory mechanisms for implementation. Here, ICES is limited to the technical components of co-generation encompassing alternative fuel sources, technologies, and end uses with the corresponding institutional aspects of participants, purposes, and utility roles. For example, technical components can include a coal-fired power generation unit where the waste heat is captured for local heating needs. In another case, use of an ICES approach can lead to fuel switching, including utilization of municipal solid waste for energy recovery. Areas such as downtowns, university or medical complexes, urban renewal projects, government complexes, and new developments offer potential applications. This guidebook is designed to demonstrate how indirect impacts of energy systems can be estimated, so that various members of the community can understand them and participate in the energy-related decisions.
Date:
November 1, 1978
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Heliostat reflective surface substrate characterization
The purpose of the surveys and analyses are to provide background information and procurement specifications for materials which have potential application in heliostat construction. The work performed under the reflective surface substrates characterization and specification task is covered. The properties of foam core sandwich constructions are emphasized. The research studies reported were directed toward determining the relationship between viscoelastic deformation of the adhesive and deflection of the mirror module.
Date:
November 1, 1978
Creator:
Gordon, N.R.
Object Type:
Report
System:
The UNT Digital Library
Complete system for portable gamma spectroscopy
The report described a system built around the Computing Gamma Spectrometer (PSA) LEA 74-008. The software primarily supports high-resolution gamma-ray spectroscopy using either a high-purity intrinsic germanium detector (HPGe) or a lithium-drifted germanium detector (Ge(Li)).
Date:
November 15, 1978
Creator:
Fuess, D.A.
Object Type:
Report
System:
The UNT Digital Library