Degree Level

Argonne National Laboratory--East site environmental report for calendar year 1990 (open access)

Argonne National Laboratory--East site environmental report for calendar year 1990

This report discusses the results of the environmental protection program at Argonne National Laboratory-East (ANL) for 1990. To evaluate the effects of ANL operations on the environment, samples of environmental media collected on the site, at the site boundary, and off the ANL site were analyzed and compared to applicable guidelines and standards. A variety of radionuclides was measured in air, surface water, groundwater, soil, grass, bottom sediment, and milk samples. In addition, chemical constituents in surface water, groundwater, and ANL effluent water were analyzed. External penetrating radiation doses were measured and the potential for radiation exposure to off-site population groups was estimated. The results of the surveillance program are interpreted in terms of the origin of the radioactive and chemical substances (natural, fallout, ANL, and other) and are compared with applicable environmental quality standards. A US Department of Energy (DOE) dose calculation methodology, based on International Commission on Radiological Protection (ICRP) recommendations, is used in this report. The status of ANL environmental protection activities with respect to the various laws and regulations which govern waste handling and disposal is discussed. This report also discusses progress being made on environmental corrective actions and restoration projects from past activities.
Date: July 1, 1991
Creator: Golchert, N.W.; Duffy, T.L. & Moos, L.P.
Object Type: Report
System: The UNT Digital Library
Capillary surfaces in exotic containers (open access)

Capillary surfaces in exotic containers

A survey is presented of results to date for capillary surfaces in exotic'' containers. These containers have the property that each one admits a continuum of distinct equilibrium free surfaces, all bounding with the container walls the same volume of fluid, making the same contact angle at the trip interface curve, and having identical mechanical energies. The containers can be so designed that they are themselves axially symmetric but that the fluid configurations of minimizing energy cannot be axially symmetric. 9 refs., 2 figs.
Date: July 1, 1991
Creator: Concus, P. (Lawrence Berkeley Lab., CA (United States)) & Finn, R. (Stanford Univ., CA (United States). Dept. of Mathematics)
Object Type: Article
System: The UNT Digital Library
Operation of TFTR neutral beams with heavy ions (open access)

Operation of TFTR neutral beams with heavy ions

High Z neutral atoms have been injected into TFTR plasmas in an attempt to enhance plasma confinement through modification of the edge electric field. TFTR ion sources have extracted 9 A of 62 keV Ne{sup +} for up to 0.2 s during injection into deuterium plasmas, and for 0.5 s during conditioning pulses. Approximately 400 kW of Ne{sup 0} have been injected from each of two ion sources. Operation was at full bending magnet current, with the Ne{sup +} barely contained on the ion dump. Beamline design modifications to permit operation up to 120 keV with krypton or xenon are described. Such ions are too massive to be deflected up to the ion dump. The plan, therefore, is to armor those components receiving these ions. Even with this armor, modest increases in the bending magnet current capability are necessary to safely reach 120 kV with Kr or Xe. Information relevant to heavy ion operation was also acquired when several ion sources were inadvertently operated with water contamination. Spectroscopic analysis of certain pathological pulses indicate that up to 6% of the extracted ions were water. After dissociation in the neutralizer, water yields oxygen ions which, as with Ne, Kr, and Xe, …
Date: July 1, 1991
Creator: Kamperschroer, J. H.; Stevenson, T. N.; Wright, K. E.; Dudek, L. E.; Grisham, L. R.; Newman, R. A. et al.
Object Type: Report
System: The UNT Digital Library
Economical clean carbon fuel and co-product gaseous and liquid from coal (open access)

Economical clean carbon fuel and co-product gaseous and liquid from coal

Unlike its predecessors, the HYDROCARB Process converts coal or other carbonaceous feedstock to a clean carbon fuel and co-product gaseous hydrogen- and/or methane (CH{sub 4})-rich gas and/or liquid methanol. Feedstock carbon content is essentially extracted as pure particulate carbon, free of sulfur, nitrogen, and ash. By eliminating the need to manufacture large quantities of hydrogen, lower capital cost and higher thermal efficiency result compared to previous coal-to-synthetic-fuel processes, allowing production of carbon fuel and at a price competitive with current energy prices. Combustion testing has shown that carbon fuel can be burned in conventional combustion and heat engine equipment with minimum modification. The HYDROCARB Process also can reduce CO{sub 2} emissions for mitigating the greenhouse problem. 5 refs., 1 fig., 2 tabs.
Date: July 1, 1991
Creator: Steinberg, M. (Brookhaven National Lab., Upton, NY (United States)) & Grohse, E.W. (HYDROCARB Corporation, New York, NY (USA))
Object Type: Article
System: The UNT Digital Library
Plutonium isotopic analysis system for plutonium samples enriched in sup 238 Pu in EP 60/61 and fuel-clad containers (open access)

Plutonium isotopic analysis system for plutonium samples enriched in sup 238 Pu in EP 60/61 and fuel-clad containers

This two-part manual describes and provides instructions for installing software for Lawrence Livermore National Laboratory's Pu-238 isotopic analysis system built for Westinghouse Hanford's Radioisotope Power Systems Facility. Part 1 contains descriptions of all the subroutines found in the main software program, WHC.ASY238. Also provided in this part are general instructions for modifying a subroutine and specific directions for relinking the WHC.ASY238 program, as well as information on the supporting program PU238.CHNG. Part 2 contains listings of the Pu-238 isotopic analysis system codes. The system uses a large (20% rel. efficiency), coaxial, n-type germanium detector (COAX). Parameter files for the detector have filenames with IS8 extensions. Spectral data files also have WH8 and I01, I02, etc. filename extensions.
Date: July 1, 1991
Creator: Ruhter, W. D.
Object Type: Report
System: The UNT Digital Library
Polarizability corrections in stimulated Raman propagation (open access)

Polarizability corrections in stimulated Raman propagation

Traditional descriptions of stimulated Raman scattering relate the various Stokes and anti-Stokes fields to the incident pump field by means of a polarizability (tensor). This description is usable for pulsed radiation but it fails when the pump carrier frequency coincides with a resonant frequency of the medium. We here describe a simple procedure for correcting the traditional polarizability approximation for pulse envelopes so as to account for effects of finite pump bandwidth. The correction amounts to the introduction of an auxiliary field envelope that incorporates pump dispersion. We apply this procedure to the equations for a degenerate, Doppler broadened ensemble of three-level atoms, in which the uppermost (virtual) level is close to resonance with the pump carrier frequency. This system becomes a two-level Raman system, but with a correction to the Raman Hamiltonian and the propagation equation. The plane-wave propagation equations presented include dispersive as well as Raman effects, and allow arbitrary combinations of field polarizations. We comment on several incidental aspects of Raman propagation, including dynamic Stark shifts, sublevel averages and fluence equations.
Date: July 30, 1991
Creator: Shore, B. W.; Johnson, M. A. & Lowder, S.
Object Type: Report
System: The UNT Digital Library
Coal surface control for advanced fine coal flotation (open access)

Coal surface control for advanced fine coal flotation

The primary objective in the scope of this research project is to develop advanced flotation methods for coal cleaning in order to achieve near total pyritic-sulfur removal at 90% Btu recovery, using coal samples procured from three major US coal seams. Concomitantly, the ash content of these coals is to be reduced to 6% or less. Investigation of mechanisms for the control of coal and pyrite surfaces prior to fine coal flotation is the main aspect of the project objectives. The results of this research are to be made available to ICF Kaiser Engineers who are currently working on the Engineering Development of Advanced Flotation under a separate contract with DOE under the Acid Rain Control Initiative program. A second major objective is to investigate factors involved in the progressive weathering and oxidation of coal that had been exposed to varying degrees of weathering, namely, open to the atmosphere, covered and in an argon-inerted'' atmosphere, over a period of twelve months. After regular intervals of weathering, samples of the three base coals (Illinois No. 6, Pittsburgh No. 8 and Upper Freeport PA) were collected and shipped to both the University of Pittsburgh and the University of California at Berkeley for …
Date: July 30, 1991
Creator: Fuerstenau, D. W.; Sastry, K. V. S.; Hanson, J. S.; Diao, J.; De, A.; Sotillo, F. et al.
Object Type: Report
System: The UNT Digital Library
Reliability of fast reactor mixed-oxide fuel during operational transients (open access)

Reliability of fast reactor mixed-oxide fuel during operational transients

Results are presented from the cooperative DOE and PNC Phase 1 and 2 operational transient testing programs conducted in the EBR-2 reactor. The program includes second (D9 and PNC 316 cladding) and third (FSM, AST and ODS cladding) generation mixed-oxide fuel pins. The irradiation tests include duty cycle operation and extended overpower tests. the results demonstrate the capability of second generation fuel pins to survive a wide range of duty cycle and extended overpower events. 15 refs., 9 figs., 4 tabs.
Date: July 1, 1991
Creator: Boltax, A.; Neimark, L.A.; Tsai, Hanchung (Argonne National Lab., IL (United States)); Katsuragawa, M. & Shikakura, S. (Power Reactor and Nuclear Fuel Development Corp., Oarai, Ibaraki (Japan). Oarai Engineering Center)
Object Type: Article
System: The UNT Digital Library
Fusion Energy Division annual progress report, period ending December 31, 1989 (open access)

Fusion Energy Division annual progress report, period ending December 31, 1989

The Fusion Program of Oak Ridge National Laboratory (ORNL) carries out research in most areas of magnetic confinement fusion. The program is directed toward the development of fusion as an energy source and is a strong and vital component of both the US fusion program and the international fusion community. Issued as the annual progress report of the ORNL Fusion Energy Division, this report also contains information from components of the Fusion Program that are carried out by other ORNL organizations (about 15% of the program effort). The areas addressed by the Fusion Program and discussed in this report include the following: Experimental and theoretical research on magnetic confinement concepts, engineering and physics of existing and planned devices, including remote handling, development and testing of diagnostic tools and techniques in support of experiments, assembly and distribution to the fusion community of databases on atomic physics and radiation effects, development and testing of technologies for heating and fueling fusion plasmas, development and testing of superconducting magnets for containing fusion plasmas, development and testing of materials for fusion devices, and exploration of opportunities to apply the unique skills, technology, and techniques developed in the course of this work to other areas. Highlights …
Date: July 1, 1991
Creator: Sheffield, J.; Baker, C. C. & Saltmarsh, M. J.
Object Type: Report
System: The UNT Digital Library
The U5. 0 Undulator for the ALS (open access)

The U5. 0 Undulator for the ALS

the U5.0 Undulator, and 89 period, 5 cm period length, 4.6 m long insertion device has been designed, is being fabricated and is scheduled for completion in early 1992. This undulator will be the first high brightness source, in the 50 to 1500 eV range, for the Advanced Light Source (ALS) at the Lawrence Berkeley Laboratory. A hybrid magnetic configuration using Nd-Fe-B permanent magnet material and vanadium permendur poles has been selected to achieve the field quality needed to meet performance requirements. The magnetic structure is modular with each half consisting of 5 assembly sections, which provide the periodic structure, and end structures, for entrance and exit correction, mounted on a steel backing beam. Each assembly section consists of 35 half-period pole assemblies bolted to a mount. The required 0.837 Tesla effective peak field at a 1.4 cm gap has been verified with model measurements. Vertical field integral correction is accomplished with the end structures, each having an arrangement of permanent magnet rotors which will be adjusted to minimize electron beam missteering over the undulator operating field range. To reduce the effect of environmental fields, the steel backing beams are connected through parallel, low-reluctance, Ni-Fe hinges. The magnetic structure is …
Date: July 15, 1991
Creator: Hoyer, E.; Chin, J.; Halbach, K.; Hassenzahl, W.V.; Humphries, D.; Kincaid, B. et al.
Object Type: Article
System: The UNT Digital Library
Algebraic modelling of components and computer simulation of refrigerator steady-state operation (open access)

Algebraic modelling of components and computer simulation of refrigerator steady-state operation

Because manufacturers of household refrigerators are facing two important problems, the replacement of refrigerant R12 and the need to improve efficiency, there is a need to develop a model of the refrigerator which greatly reduces the computer time required to evaluate the refrigeration cycle. This paper describes a refrigerator model where all equations are reduced to algebraic form. The model has the following features: (1) each component of the refrigerator is modelled separately, (2) all differential equations are reduced to algebraic equations, and (3) the transport properties of new refrigerants are not needed. The model can be used to: (1) evaluate new refrigerants as drop-in refrigerants, (2) study different refrigeration cycles and (3) optimize the refrigerator for each new refrigerant. This paper describes the development of the model and, where possible, the results of the model are compared to experimental data. 12 refs., 7 figs.
Date: July 1, 1991
Creator: Rogers, S. & Tree, D.
Object Type: Article
System: The UNT Digital Library
TAP 3, Training Program Support Manual (open access)

TAP 3, Training Program Support Manual

Training programs at DOE facilities should provide well-trained, qualified personnel to safely and efficiently operate the facilities in accordance with DOE requirements. A need has been identified for guidance regarding analysis, design, development, implementation, and evaluation of consistent and reliable performance-based training programs. Accreditation of training programs at Category A reactors and high-hazard and selected moderate-hazard nonreactor nuclear facilities will assure consistent, appropriate, and cost-effective training of personnel responsible for the operation, maintenance, and technical support of these facilities. Training programs that are designed and based on systematically determined job requirements, instead of subjective estimation of trainee needs, yield training activities that are consistent and develop or improve knowledge, skills, and abilities that can be directly related to the work setting. Because the training is job-related, the content of these programs more efficiently and effectively meets the needs of the employee. Besides a better trained work force, a greater level of operational reactor safety can be realized. This manual is intended to provide an overview of the accreditation process and a brief description of the elements necessary to construct and maintain training programs that are based on the requirements of the job. Two companion manuals provide additional information to assist …
Date: July 1, 1991
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Converting a commercial electric direct-drive robot to operate from joint torque commands (open access)

Converting a commercial electric direct-drive robot to operate from joint torque commands

Many robot control algorithms for high performance in-contact operations including hybrid force/position, stiffness control and impedance control approaches require the command the joint torques. However, most commercially available robots do not provide joint torque command capabilities. The joint command at the user level is typically position or velocity and at the control developer level is voltage, current, or pulse-width, and the torque generated is a nonlinear function of the command and joint position. To enable the application of high performance in-contact control algorithms to commercially available robots, and thereby facilitate technology transfer from the robot control research community to commercial applications, an methodology has been developed to linearize the torque characteristics of electric motor-amplifier combinations. A four degree of freedom Adept 2 robot, having pulse-width modulation amplifiers and both variable reluctance and brushless DC motors, is converted to operate from joint torque commands to demonstrate the methodology. The commercial robot controller is replaced by a VME-based system incorporating special purpose hardware and firmware programmed from experimental data. The performance improvement is experimentally measured and graphically displayed using three-dimensional plots of torque vs command vs position. The average percentage torque deviation over the command and position ranges is reduced from as …
Date: July 1, 1991
Creator: Muir, P. F.
Object Type: Report
System: The UNT Digital Library
Improved heat recovery and high-temperature clean-up for coal-gas fired combustion turbines (open access)

Improved heat recovery and high-temperature clean-up for coal-gas fired combustion turbines

This study investigates the performance of an Improved Heat Recovery Method (IHRM) applied to a coal-gas fired power-generating system using a high-temperature clean-up. This heat recovery process has been described by Higdon and Lynn (1990). The IHRM is an integrated heat-recovery network that significantly increases the thermal efficiency of a gas turbine in the generation of electric power. Its main feature is to recover both low- and high-temperature heat reclaimed from various gas streams by means of evaporating heated water into combustion air in an air saturation unit. This unit is a packed column where compressed air flows countercurrently to the heated water prior to being sent to the combustor, where it is mixed with coal-gas and burned. The high water content of the air stream thus obtained reduces the amount of excess air required to control the firing temperature of the combustor, which in turn lowers the total work of compression and results in a high thermal efficiency. Three designs of the IHRM were developed to accommodate three different gasifying process. The performances of those designs were evaluated and compared using computer simulations. The efficiencies obtained with the IHRM are substantially higher those yielded by other heat-recovery technologies using …
Date: July 1, 1991
Creator: Barthelemy, N.M. & Lynn, S.
Object Type: Report
System: The UNT Digital Library
Conclusions and recommendations based on interim report (open access)

Conclusions and recommendations based on interim report

This memorandum discusses five key issues that initial interviews have brought into focus: The preoccupation of the public with nuclear waste disposal, the credibility of public opinion polls addressing nuclear power, the unlikelihood of dramatic change in opinion by nuclear critics, difficulties in communicating technical concepts, and the problem of focussing narrowly or broadly on policy issues.
Date: July 26, 1991
Creator: Benson, B.
Object Type: Report
System: The UNT Digital Library
Pre-tinning and flux considerations on the reliability of solder surface (open access)

Pre-tinning and flux considerations on the reliability of solder surface

The kinetics of wetting were studied on several different prepared surfaces of copper (Cu) to simulate the microstructure observed in pre-tinned Cu-clad printed circuit boards. The results illustrate the effectiveness of pre-tinning in maintaining the solderability of Cu surfaces. Pre-tinning with Pb-rich solder (95Pb-5Sn) is particularly effective since solderability is preserved even after a relatively long aging treatment. On the other hand, pre-tinning with eutectic solder risks the loss of solderability during aging or baking due to surface exposure of an {var epsilon}-phase intermetallic with poor wetting properties. The results also confirm the presence of carbon in pre-tinned specimens due to the use of flux. The effect of carbon on solderability is not yet known. 13 refs., 8 figs., 1 tab.
Date: July 1, 1991
Creator: Sunwoo, A.J. (Lawrence Livermore National Lab., CA (United States)); Morris, J.W. Jr. (Lawrence Berkeley Lab., CA (United States)) & Lucey, G.K. (Harry Diamond Labs., Adelphi, MD (United States))
Object Type: Article
System: The UNT Digital Library
Direct Conversion Technology (open access)

Direct Conversion Technology

The overall objective of the Direct Conversion Technology task is to develop an experimentally verified technology base for promising direct conversion systems that have potential application for energy conservation in the end-use sectors. Initially, two systems were selected for exploratory research and advanced development. These are Alkali Metal Thermal-to-Electric Converter (AMTEC) and Two-Phase Liquid Metal MD Generator (LMMHD). This report describes progress that has been made during the first six months of 1992 on research activities associated with these two systems. (GHH)
Date: July 1, 1992
Creator: Back, L.H.; Fabris, G. & Ryan, M.A.
Object Type: Report
System: The UNT Digital Library
Plutonium isotopic analysis system for plutonium samples enriched in sup 238 Pu in EP 60/61 and fuel-clad containers (open access)

Plutonium isotopic analysis system for plutonium samples enriched in sup 238 Pu in EP 60/61 and fuel-clad containers

This user's manual is addressed to the Hanford Site personnel (routine operators and supervisors) who perform measurements with the Pu-238 isotopic analysis system. Each chapter begins with a table of contents that lists the section titles, illustrations, and tabular data presented in that chapter. The first chapter in this manual is an introduction to the system. Chapter 2 lists required settings for the system's commercial nuclear instrument modules. System operating procedures are given in Chapter 3. Chapter 4 contains routine and supervisorial operator interactions. Chapter 5 describes the system's short- and long-printout output formats. Chapter 6 gives instructions for changing system parameters. Error messages are listed and described in Chapter 7. Chapter 8 contains reference articles on measuring relative plutonium isotopics in solid samples.
Date: July 1, 1991
Creator: Ruhter, W. D.
Object Type: Report
System: The UNT Digital Library
Technical basis for internal dosimetry at Hanford (open access)

Technical basis for internal dosimetry at Hanford

The Hanford Internal Dosimetry Program, administered by Pacific Northwest Laboratory for the US Department of Energy, provides routine bioassay monitoring for employees who are potentially exposed to radionuclides in the workplace. This report presents the technical basis for routine bioassay monitoring and the assessment of internal dose at Hanford. The radionuclides of concern include tritium, corrosion products ({sup 58}Co, {sup 60}Co, {sup 54}Mn, and {sup 59}Fe), strontium, cesium, iodine, europium, uranium, plutonium, and americium,. Sections on each of these radionuclides discuss the sources and characteristics; dosimetry; bioassay measurements and monitoring; dose measurement, assessment, and mitigation and bioassay follow-up treatment. 78 refs., 35 figs., 115 tabs.
Date: July 1, 1991
Creator: Sula, M.J.; Carbaugh, E.H. & Bihl, D.E.
Object Type: Report
System: The UNT Digital Library
A 2-D imaging heat-flux gauge (open access)

A 2-D imaging heat-flux gauge

This report describes a new leadless two-dimensional imaging optical heat-flux gauge. The gauge is made by depositing arrays of thermorgraphic-phosphor (TP) spots onto the faces of a polymethylpentene is insulator. In the first section of the report, we describe several gauge configurations and their prototype realizations. A satisfactory configuration is an array of right triangles on each face that overlay to form squares when the gauge is viewed normal to the surface. The next section of the report treats the thermal conductivity of TPs. We set up an experiment using a comparative longitudinal heat-flow apparatus to measure the previously unknown thermal conductivity of these materials. The thermal conductivity of one TP, Y{sub 2}O{sub 3}:Eu, is 0.0137 W/cm{center dot}K over the temperature range from about 300 to 360 K. The theories underlying the time response of TP gauges and the imaging characteristics are discussed in the next section. Then we discuss several laboratory experiments to (1) demonstrate that the TP heat-flux gauge can be used in imaging applications; (2) obtain a quantum yield that enumerates what typical optical output signal amplitudes can be obtained from TP heat-flux gauges; and (3) determine whether LANL-designed intensified video cameras have sufficient sensitivity to acquire …
Date: July 1, 1991
Creator: Noel, B.W.; Borella, H.M. (Los Alamos National Lab., NM (United States)); Beshears, D.L.; Sartory, W.K.; Tobin, K.W.; Williams, R.K. (Oak Ridge National Lab., TN (United States)) et al.
Object Type: Report
System: The UNT Digital Library
Mini-jet and particle production in ultra-relativistic heavy ion collisions (open access)

Mini-jet and particle production in ultra-relativistic heavy ion collisions

Mini-jet and particle production are studied in the framework of HIJING Monte Carlo model which can describe pp and p{bar p} collisions well from ISR to Fermilab Tevatron energies. Mini-jets are shown to have eminent contributions to particle production in ultra-relativistic heavy ion collisions. However, parton shadowing and jet quenching also have important effects and can be studied by single particle distributions. 19 refs., 5 figs.
Date: July 1, 1991
Creator: Wang, Xin-Nian.
Object Type: Article
System: The UNT Digital Library
Probe molecule studies: Active species in alcohol synthesis (open access)

Probe molecule studies: Active species in alcohol synthesis

The goal of this research is to develop a better understanding of the mechanisms of formation of alcohols and other oxygenates from syngas over supported catalysts. Different probe molecules are planned to add in situ during the reaction to help delineate reaction path ways and identify reaction intermediate species. The key of our study is to investigate how the species generated by these probe molecules interact with surface species present during oxygenate formation. CO hydrogenation reactions are being carried out in both the presence and the absence of the probe molecule under conditions which favor the formation of oxygenated products. A reaction and analysis system capable of carrying out the experiments for this study has been set up, modified, and tested. First, the commercially important Cu/ZnO/Al203 catalyst for methanol synthesis is being studied. Other catalysts, such as Pd and Rh with and without alkali or oxide promoters which are known to produce oxygenates from syngas, are being prepared and characterized for this study. Based on the observation of a previous study that nitromethane is an effective source of CH2 groups, it will be one of the primary probe molecules to be studied. In addition, acetylenic compounds are primary choices for …
Date: July 1, 1991
Creator: Blackmond, D.G. & Wender, I.
Object Type: Report
System: The UNT Digital Library
Fiber-tile optical studies at Argonne (open access)

Fiber-tile optical studies at Argonne

In support of a fiber-tile calorimeter for SDC, we have done studies on a number of topics. The most basic problems were light output and uniformity of response. Using a small electron beam, we have studied fiber placement, tile preparation, wrapping and masking, fiber splicing, fiber routing, phototube response, and some degradation factors. We found two configurations which produced more light output than the others and reasonably uniform response. We have chosen one of these to go into production for the EM test module on the basis of fiber routing for ease of assembly of the calorimeter. We have also applied some of the tools we developed to CDF end plug tile uniformity, shower max testing and development for a couple of detectors, and development of better techniques for radiation damage studies. 18 figs.
Date: July 23, 1991
Creator: Underwood, D.G.; Morgan, D.J. & Proudfoot, J.
Object Type: Report
System: The UNT Digital Library
A PC-based telemetry system for acquiring and reducing data from multiple PCM streams (open access)

A PC-based telemetry system for acquiring and reducing data from multiple PCM streams

The Solar Energy Research Institute's (SERI) Wind Research Program is using Pulse Code Modulation (PCM) telemetry data-acquisition systems to study horizontal-axis wind turbines. Many PCM systems are combined for use in test installations that require accurate measurements from a variety of different locations. SERI has found them ideal for data-acquisition from multiple wind turbines and meteorological towers in wind parks. A major problem has been in providing the capability to quickly combine and examine incoming data from multiple PCM sources in the field. To solve this problem, SERI has developed a low-cost PC-based PCM telemetry data-reduction system to facilitate quick, in-the-field multiple-channel data analysis. Called the PC-PCM System,'' it consists of two basic components. First, PC-compatible hardware boards are used to decode and combine multiple PCM data streams. Up to four hardware boards can be installed in a single PC, which provides the capability to combine data from four PCM streams directly to PC disk or memory. Each stream can have up to 62 data channels. Second, a software package written for use under DOS was developed to simplify data-acquisition control and management. The software provides a quick, easy-to-use interface between the PC and multiple PCM data streams. Called the …
Date: July 1, 1991
Creator: Simms, D A & Butterfield, C P
Object Type: Article
System: The UNT Digital Library