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Measurement and Modeling of Advanced Coal Conversion Processes. Twenty-First Quarterly Report, October 1, 1991--December 31, 1991

Description: The objective of this study are to establish the mechanisms and rates of basic steps in coal conversion processes, to integrate and incorporate this information into comprehensive computer models for coal conversion processes, to evaluate these models and to apply them to gasification, mild gasification and combustion in heat engines.
Date: December 31, 1991
Creator: Solomon, P. R.; Serio, M. A.; Hamblen, D. G.; Smoot, L. D. & Brewster, B. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement and Modeling of Advanced Coal Conversion Processes. Annual Report, October 1990--September 1991

Description: The overall objective of this program is the development of predictive capability for the design, scale up, simulation, control and feedstock evaluation in advanced coal conversion devices. This program will merge significant advances made in measuring and quantitatively describing the mechanisms in coal conversion behavior. Comprehensive computer codes for mechanistic modeling of entrained-bed gasification. Additional capabilities in predicting pollutant formation will be implemented and the t… more
Date: December 31, 1991
Creator: Solomon, P. R.; Serio, M. A.; Hamblen, D. G.; Smoot, L. D. & Brewster, B. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of an advanced continuous mild gasification process for the production of coproducts: Task 4.6, Technical and economic evaluation

Description: Morgantown Energy Technology Center (METC) of DOE has sponsored, and continues to sponsor, programs for the development of technology and market strategies which will lead to the commercialization of processes for the production of coproducts from mild gasification of coal. It has been recognized by DOE and industry that mild gasification is a promising technology with potential to economically convert coal into marketable products, thereby increasing domestic coal utilization. In this process,… more
Date: December 1, 1991
Creator: Hogsett, R. F. & Jha, M. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement and Modeling of Advanced Coal Conversion Processes. 19th Quarterly Report, April 1, 1991--June 30, 1991

Description: The objectives of this study are to establish the mechanisms and rates of basic steps in coal conversion processes, to integrate and incorporate this information into comprehensive computer models for coal conversion processes, to evaluate these models and to apply them to gasification, mild gasification and combustion in heat engines. (VC)
Date: September 25, 1991
Creator: Solomon, P. R.; Serio, M. A.; Hamblen, D. G.; Smoot, L. D. & Brewster, B. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Study and analysis of the stress state in a ceramic, button-head, tensile specimen

Description: The final results are reported for a study to identify and correct the causes of nongage-section failures (notably button-head failures) in ceramic tensile specimens observed in several laboratories. Numerical modeling of several candidate specimen gripping systems has shown inherent stress concentrations near the specimen button head at which the maximum stress may approach 75 to 100% of the gage-section stress for certain grip conditions. Empirical comparisons of both tapered- and straight-co… more
Date: September 1, 1991
Creator: Jenkins, M. G.; Ferber, M. K.; Martin, R. L.; Jenkins, V. T. & Tennery, V. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Assessment of costs and benefits of flexible and alternative fuel use in the US transportation sector

Description: The DOE is conducting a comprehensive technical analysis of a flexible-fuel transportation system in the United States -- that is, a system that could easily switch between petroleum and another fuel, depending on price and availability. The DOE Alternative Fuels Assessment is aimed directly at questions of energy security and fuel availability, but covers a wide range of issues. This report examines environmental, health, and safety concerns associated with a switch to alternative- and flexibl… more
Date: October 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Screening of processing and upgrading schemes

Description: The RFP was predicated on DOE's desire to enhance the development of advanced transportation fuels made from coal via a program to process mild coal gasification (MCG) liquids into high volumetric energy density (HEDF) test fuels. The desired product fuels were to be cost effectively manufactured, have high volumetric energy density, and be hydrocarbon-based for existing and prototype turbine and diesel engines. The sources for these special fuels consist of the abundant and secure indigenous e… more
Date: October 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A study of coal particle shape and three-body wear: Part 1, Design and development of a new three-body wear testing machine: Part 2, Particle shape and three-body wear

Description: Three-body wear involves two surfaces and an intermediate particle trapped between the two surfaces. A machine has been constructed to measure normal and frictional forces due to three-body wear. This machine accurately positions specimens a predetermined distance apart from each other and introduces particles to the interface between the specimens. Different types of specimen combinations have been tested to give a variety of data. Loads that result from the wear test are sampled and stored. W… more
Date: January 1, 1991
Creator: Clark, N.N.; Means, K.H.; James, R. & Thompson, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparisons of computed and measured three-dimensional velocity fields in a motored two-stroke engine

Description: Computer simulations are compared with measurements of the three-dimensional, unsteady scavenging flows of a motored two-stroke engine. Laser Doppler velocimetry measurements were made on a modified Suzuki DT-85 ported engine. Calculations were performed using KIVA-3, a computer program that efficiently solves the intake and exhaust port flows along with those in the cylinder. Measured and computed cylinder pressures and velocities are compared. Pressures agree well over the cycle as do the vel… more
Date: January 1, 1991
Creator: Amsden, A. A.; O'Rourke, P. J.; Butler, T. D. (Los Alamos National Lab., NM (United States)); Meintjes, K. & Fansler, T. D. (General Motors Research Labs., Warren, MI (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Recent improvements in check valve monitoring methods

Description: In support of the NRC Nuclear Plant Aging Research (NPAR) program, ORNL has carried out an evaluation of three check valve monitoring methods: acoustic emission, ultrasonic inspection, and magnetic flux signature analysis (MFSA). This work has focussed on determining the capabilities of each method to provide diagnostic information useful in determining check valve aging and service wear effects (degradation) and undesirable operating modes. In addition, as part of the ORNL Advanced Diagnostic … more
Date: January 1, 1991
Creator: Haynes, H. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of NRC maintenance team inspection reports for managing aging

Description: A nuclear power plant's maintenance program is the principal vehicle through which age-related degradation is managed. Over the past two years, the NRC (Nuclear Regulatory Commission) has evaluated the maintenance program of every nuclear power plant in the U.S. The reports issued on these in-depth team inspections have been reviewed to ascertain the strengths and weaknesses of the programs as related to the need to understand and manage the effects of aging on nuclear power plant systems, stru… more
Date: January 1, 1991
Creator: Fresco, A. & Gunther, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Low heat rejection diesel ceramic coupon tests

Description: Results are reported from studies in which several monolithic ceramic materials in the form of modulus-of-rupture bars were exposed for 100 h to the combustion conditions found in either a small single- or two-cylinder diesel engine. Fuels included a standard Phillips D-2 diesel or synthetic mixture of the Phillips D-2 and an aromatic blend. The ceramics included two commercial grades of partially stabilized zirconia (PSZ-TS and PSZ-MS), silicon nitride (GTE WESGO SNW-1000 and Norton NT-154), a… more
Date: January 1, 1991
Creator: Brinkman, C.R.; Liu, K.C.; Graves, R.L. & West, B.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Report on the planning workshop on cost-effective ceramic machining

Description: A workshop on Cost Effective Ceramic Machining'' (CECM) was held at Oak Ridge Associated Universities Pollard Auditorium, Oak Ridge, Tennessee, May 1991. The purpose of this workshop was to present a preliminary project plan for industry critique and to identify specific components and cost-reduction targets for a new project on Cost Effective Ceramic Machining. The CECM project is an extension of the work on the Ceramic Technology for Advanced Heat Engines (CTAHE) Program sponsored by the Depa… more
Date: November 1, 1991
Creator: Blau, P.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Identification and initial assessment of candidate BWR late-phase in-vessel accident management strategies

Description: Work sponsored by the United States Nuclear Regulatory Commission (USNRC) to identify and perform preliminary assessments of candidate BWR (boiling water reactor) in-vessel accident management strategies was completed at Oak Ridge National Laboratory (ORNL) during fiscal year 1990. Mitigative strategies for containment events have been the subject of a companion study at Brookhaven National Laboratory. The focus of this Oak Ridge effort was the development of new strategies for mitigation of th… more
Date: April 15, 1991
Creator: Hodge, S.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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NDE (nondestructive examination) development for ceramics for advanced heat engines

Description: The Department of Energy (DOE) Ceramic Technology for Advanced Heat Engines (CTAHE) project was initiated in 1983 to meet the ceramic technology needs of DOE's advanced heat engines programs (i.e., advanced gas turbines and low heat rejection diesels). The objective is to establish an industrial ceramic technology base for reliable and cost-effective high-temperature components. Reliability of ceramics was recognized as the major technology need. To increase the material reliability of current … more
Date: January 1, 1991
Creator: McClung, R.W. (McClung (R.W.), Powell, TN (USA)) & Johnson, D.R. (Oak Ridge National Lab., TN (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Innovative Coal-Fueled Diesel Engine Injector

Description: The purpose of this research investigation was to develop an electronic coal water slurry injection system in conjunction with the Thermal Ignition Combustion System (TICS) concept to achieve autoignition of CWS at various engine load and speed conditions without external ignition sources. The combination of the new injection system and the TICS is designed to reduce injector nozzle spray orifice wear by lowering the peak injection pressure requirements. (VC)
Date: May 1, 1991
Creator: Badgley, P. & Doup, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A quiet operating I. C. engine with complete highly efficient expansion cycle

Description: A program for the development of a quiet operating internal combustion engine with complete highly efficient expansion cycle was administered by the Department of Energy on June 14, 1988 through December 13, 1989. An extension, modification M001 to the contract allowed up to June 12, 1991 to complete this work. The extension was granted in order for Engine Research Associates, Inc. (ERA) to continue the development of the engine on its own funds to a level of performance required for an indepen… more
Date: December 2, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Study and analysis of the stress state in a ceramic, button-head, tensile specimen

Description: The final results are reported for a study to identify and correct the causes of nongage-section failures (notably button-head failures) in ceramic tensile specimens observed in several laboratories. Numerical modeling of several candidate specimen gripping systems has shown inherent stress concentrations near the specimen button head at which the maximum stress may approach 75 to 100% of the gage-section stress for certain grip conditions. Empirical comparisons of both tapered- and straight-co… more
Date: September 1, 1991
Creator: Jenkins, M. G.; Ferber, M. K.; Martin, R. L.; Jenkins, V. T. & Tennery, V. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The railplug: Development of a new ignitor for internal combustion engines

Description: The goal of the railplug project is to commercialize this miniaturized railgun as an engine technology as rapidly as possible. To improve the technology transfer process, a board of industrial advisors was established. A list of representatives is included at the end of this annual report. The Railplug External Advisory Board (REAB) met in Austin on March 17--18, 1991 to discuss the project plan. A list of comments from the REAB is included at the end of this progress report, along with our wri… more
Date: October 1, 1991
Creator: Matthew, R. D.; Nichols, S. P. & Weldon, W. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Wear mechanism and wear prevention in coal-fueled diesel engines

Description: Coal fueled diesel engines present unique wear problems in the piston ring/cylinder liner area because of their tendency to contaminate the lube-oil with high concentrations of highly abrasive particles. This program involved a series of bench-scale wear tests and engine tests designed to investigate various aspects of the ring/liner wear problem and to make specific recommendations to engine manufacturers as to how to alleviate these problems. The program was organized into tasks, designed to … more
Date: October 1, 1991
Creator: Schwalb, J. A. & Ryan, T. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wear mechanism and wear prevention in coal-fueled diesel engines

Description: Over the past several years, interest has arisen in the development of coal-fired diesel engines for the purpose of efficiently utilizing the extensive coal reserves in the United States, and therefore reducing dependence on foreign oil. One process, which is being considered for use in producing clean coal fuel products involves mild gasification. This process produces by-products which can be further refined and, when blended with neat diesel fuel, used as an engine fuel. The purpose of this … more
Date: July 1, 1991
Creator: Wakenell, J. F.; Fritz, S. G. & Schwalb, J. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement and Modeling of Advanced Coal Conversion Processes

Description: The overall objective of this program is the development of predictive capability for the design, scale up, simulation, control and feedstock evaluation in advanced coal conversion devices. This program will merge significant advances made in measuring and quantitatively describing the mechanisms in coal conversion behavior. Comprehensive computer codes for mechanistic modeling of entrained-bed gasification. Additional capabilities in predicting pollutant formation will be implemented and the t… more
Date: January 1, 1991
Creator: Solomon, P. R.; Serio, M. A.; Hamblen, D. G.; Smoot, L. D. & Brewster, B. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wear mechanism and wear prevention in coal-fueled diesel engines

Description: Contamination of the lube-oil with hard abrasive particles leads to a three-body abrasive wear mechanism that highly accelerates piston ring/cylinder liner wear in coal-fueled diesel engines. One approach to reducing that wear is to modify the size and orientation of surface asperities on the cylinder to enhance the formation of a hydrodynamic film, and to provide avenues of escape for particles that would otherwise be trapped in the wear zone. Another approach is to introduce additives into th… more
Date: June 1, 1991
Creator: Schwalb, J. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Inherently safe nuclear-driven internal combustion engines

Description: A family of nuclear driven engines is described in which nuclear energy released by fissioning of uranium or plutonium in a prompt critical assembly is used to heat a working gas. Engine performance is modeled using a code that calculates hydrodynamics, fission energy production, and neutron transport self-consistently. Results are given demonstrating a large negative temperature coefficient that produces self-shutoff of energy production. Reduced fission product inventory and the self-shutoff … more
Date: June 14, 1991
Creator: Alesso, P.; Chow, Tze-Show; Condit, R.; Heidrich, J.; Pettibone, J. & Streit, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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