Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)

24-28 July 2000

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  • A Collection of the 35th Intersociety Energy Conversion Engineering Conference & Exhibit (IECEC) Technical Papers Volume 2 [front matter]

    Publication Year: 2000, Page(s):0_1 - XVII
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    Freely Available from IEEE
  • Author index

    Publication Year: 2000, Page(s):0_2 - 0_5
    IEEE is not the copyright holder of this material | PDF file iconPDF (207 KB)
    Freely Available from IEEE
  • An efficient time-space numerical solver for global warming

    Publication Year: 2000, Page(s):1026 - 1031 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (404 KB)

    An impact of climate change due to global warming will be one of the most severe environmental issues in the 21st Century. In this paper, an efficient numerical solver for a global climate model is developed and presented as a useful and powerful tool for global warming analysis. The model mainly consists of four parts; i.e., atmosphere and ocean dynamics, atmosphere and ocean physics, land surfac... View full abstract»

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  • A preliminary study for designing wind turbine blades using Caribbean technology

    Publication Year: 2000, Page(s):767 - 774 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (496 KB)

    Advances in computing technology have made computer simulation a relatively inexpensive avenue for modeling and design. Computational fluid dynamics has been increasingly used in the design of fluid interactive systems including wind turbine airfoils, This paper presents a comparative study, which is the first phase of an ongoing research project. A numerical code is used to analyze flow over wind... View full abstract»

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  • Crystal growth of ethanol water solution [for thermal energy storage]

    Publication Year: 2000, Page(s):1019 - 1025 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (580 KB)

    In this study, the authors investigated the mechanism of mushy crystal formation and the state of a mushy layer formed on a cooling surface, with the objective of utilizing the ethanol water solution as a coolant or a thermal energy storage material. To do this, the effect of surface temperature on crystal growth of ethanol water solution was investigated for various concentrations of the solution... View full abstract»

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  • Evaluating alternatives for integrating distributed DC generation with AC power systems

    Publication Year: 2000, Page(s):763 - 766 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (320 KB)

    Distributed generation generally means on site electric power generation devices such as photovoltaics or fuel cells that are installed at the customer end of the electric power system. One complication is that the photovoltaic panel and the fuel cell generate direct current (DC) while the electric power system and thus existing end use equipment has been designed for alternating current (AC). Thi... View full abstract»

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  • Networked rectenna array for smart material actuators

    Publication Year: 2000, Page(s):1449 - 1457 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (648 KB)

    The concept of microwave-driven smart material actuators is envisioned as the best option to alleviate the complexity associated with hard-wired control circuitry. A networked rectenna patch array receives and converts microwave power into DC power for an array of smart actuators. To use microwave power effectively, the concept of a power allocation and distribution (PAD) circuit is adopted for ne... View full abstract»

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  • Long-term supercooled thermal energy storage (thermophysical properties of disodium hydrogenphosphate 12H2O)

    Publication Year: 2000, Page(s):1013 - 1018 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (500 KB)

    This work aims at developing long-term latent heat storage using supercooling. Compared with conventional thermal energy storage systems, supercooled thermal energy storage (Super-TES) can store thermal energy at rather lower temperatures, below the melting point of the phase change material, so that Super-TES can reduce heat loss from the storage system. Although the supercooling degree depends n... View full abstract»

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  • Biomass-fueled, high-temperature, air-blown gasification systems

    Publication Year: 2000, Page(s):793 - 803 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (868 KB)

    Several aspects of using an advanced, high-temperature air-blown gasification system for converting biomass wastes into fuel gas are examined, The gasification system, known as MEET (multi-staged enthalpy extraction technology), has many features that are advantageous for biomass power generation. The low-cost gasifier is extremely compact and flexible, capable of operating efficiently on a wide r... View full abstract»

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  • A novel micro-capillary groove-wick miniature heat pipe

    Publication Year: 2000, Page(s):818 - 826 vol.2
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (564 KB)

    Miniature heat pipes (MHP) are passive heat transport devices mainly considered in electronics packaging for high heat flux acquisition and transport and their applications could include thermal management of a variety of electronic devices such as computer processors and laser diodes. This paper describes a novel screen wick design suitable for miniature heat pipes. The new design promises improv... View full abstract»

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  • Design and performance evaluation on a small-sized AMTEC cell component

    Publication Year: 2000, Page(s):925 - 930 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (452 KB)

    An AMTEC cell component of a free-standing type has been designed and fabricated. For the proposed cell component it is intended to use a small-sized and thin beta"-alumina electrolyte tube. The particular expected features of the cell component are its structural simplicity and lower temperature operation around 900 K. The design adopted molybdenum cathode electrodes and capillary wick tubes of 5... View full abstract»

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  • STATCOM modeling and analysis in damping power system oscillations

    Publication Year: 2000, Page(s):756 - 762 vol.2
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB)

    In this paper, we discuss the single-machine infinite-bus system with one static synchronous compensator (STATCOM) asymmetrically installed as a current source. Together with a classical two order generator model, a simple power equation is drawn to give direct and clear physical concepts on synchronizing and damping torque coefficients. On the basis of the equations, some basic issues, such as th... View full abstract»

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  • Thermoeconomics of hydrogen liquefiers operating on the modified Collins cycle

    Publication Year: 2000, Page(s):1383 - 1392 vol.2
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (692 KB)

    Hydrogen liquefaction systems have been the subject of intense investigations for many years. Some established gas liquefaction systems, such as the precooled Linde-Hampson systems, are not used for hydrogen liquefaction in part because of their relatively low efficiencies. Recently, more promising systems employing the modified Collins cycle have been introduced. This paper reports on second law ... View full abstract»

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  • Performance comparison between vented nickel cadmium and sealed maintenance free nickel cadmium aircraft batteries

    Publication Year: 2000, Page(s):1059 - 1063 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    Recently, a sealed maintenance-free aircraft battery has found its way into both military and commercial applications and is demonstrating its superior performance in a number of areas. The technology uses sealed space cell construction and accompanying plate fabrication techniques along with a higher standard of quality control. The technology promises to have a cycle time cost advantage over the... View full abstract»

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  • Impedance studies on cathodes in Li-ion cells

    Publication Year: 2000, Page(s):968 - 975 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (484 KB)

    Li-ion batteries have generated widespread interest as batteries of choice for a number of applications, because of their attractive energy and power densities. However, the performance at sub-ambient temperatures is very limited due to the increase in cell impedance at sub-ambient temperatures. AC impedance measurements seem to indicate that the ohmic resistance-which includes electrolyte resista... View full abstract»

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  • Power without wires (POWOW)-a SEP concept for space exploration

    Publication Year: 2000, Page(s):1443 - 1448 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (468 KB)

    Electric propulsion has emerged as a cost-effective solution to a wide range of satellite applications. Deep Space 1 successfully demonstrated electric propulsion as the primary propulsion source for a satellite. The POWOW concept is a solar-electric propelled spacecraft capable of significant cargo and short trip times for traveling to Mars. It would enter aerosynchronous orbit and from there, be... View full abstract»

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  • Demonstration of a micro-CPL based on MEMS fabrication technologies

    Publication Year: 2000, Page(s):1198 - 1204 vol.2
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (880 KB)

    Utilizing current micro electro mechanical systems (MEMS) technologies, a three-port microcapillary pumped loop (micro-CPL) was designed, fabricated and tested to provide integral cooling to electronics or MEMS type devices. The two wafer design consists of one silicon and one borofloat glass wafer. An analytical study was used in determining the geometry of the device, including the evaporator di... View full abstract»

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  • Optimal power production scheduling in a complex cogeneration system with heat storage

    Publication Year: 2000, Page(s):1004 - 1012 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (624 KB)

    The authors discuss the problem of finding an optimal electricity and heat production schedule subject to the constraints imposed by the need to match simultaneously both the district heating and the electric power loads. In particular, they refer to the relatively complex cogeneration and district heating system of the city of Brescia, Italy, and present: a model for the definition of the dynamic... View full abstract»

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  • Thermodynamic analysis of heat engine with a Knudsen-effect pressure generator

    Publication Year: 2000, Page(s):900 - 907 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (468 KB)

    The analysis on the basis of the two laws of thermodynamics entails that, in order to obtain work, two heat exchangers and one work exchanger are necessary (even if in general they are not sufficient). In general, two work exchangers (turbine and pump or compressor) are present. Nevertheless, since the presence of two work exchangers is not a consequence of the two laws of thermodynamics, one must... View full abstract»

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  • Recent GRC aerospace technologies applicable to terrestrial energy systems

    Publication Year: 2000, Page(s):865 - 875 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1028 KB)

    This paper is an overview of a wide range of recent aerospace technologies under development at the NASA Glenn Research Center, in collaboration with other NASA centers, government agencies, industry and academia. The focussed areas are space solar power, advanced power management and distribution systems, Stirling cycle conversion systems, fuel cells, advanced thin film photovoltaics and batterie... View full abstract»

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  • Assessment of the free-piston Stirling convertor as a long life power convertor for space

    Publication Year: 2000, Page(s):1239 - 1247 vol.2
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (836 KB)

    There is currently a renewed interest in the use of free-piston Stirling power convertors for space power applications. More specifically, the Stirling convertor is being developed to be part of the Stirling Radioisotope Power System to supply electric power to spacecraft for NASA deep space science missions. The current development effort involves the Department of Energy, Germantown, MD, the NAS... View full abstract»

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  • Characteristics of an indirect-methanol fuel cell system

    Publication Year: 2000, Page(s):1326 - 1332 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (544 KB)

    This paper discusses the various system interactions that can affect the efficiency and dynamic performance of an indirect methanol fuel cell system. The characterization of the load following IMFC system is done using the simulation model developed by the Fuel Cell Vehicle Modeling Program at the University of California-Davis. The first part of the paper briefly describes the components within t... View full abstract»

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  • Production of hydrogen and medium btu gas via pyrolysis of a Kraft lignin in a fixed-bed reactor

    Publication Year: 2000, Page(s):782 - 792 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (592 KB)

    Lignins are generally used as a low grade fuel in the pulp and paper industry. In this work, pyrolysis of a Kraft lignin obtained from Westvaco was carried out in a fixed-bed reactor to produce hydrogen and gas with medium heating value. The effects of carrier gas (helium) flow rate (13.4-33 ml/min/g lignin), heating rate (5-15°C/min) and temperature (350-800°C) on the lignin conversion, p... View full abstract»

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  • Development of solar and micro co-generation power installations on the basis of Stirling engines

    Publication Year: 2000, Page(s):723 - 733 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (940 KB)

    In this paper the research activities of the Laboratory for Stirling Engines at the Physical-Technical Institute, Tashkent on the development of solar and micro cogeneration power installations with Stirling engines are described. Schematic sketches and design and performance parameters of a 1 kW dish/Stirling engine unit with a parabolic concentrator and of a solar water pump installation, incorp... View full abstract»

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  • Thermal stress distribution in a high temperature heat pipe

    Publication Year: 2000, Page(s):813 - 817 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (212 KB)

    In this paper, the authors use temperature results from a heat pipe simulation code, to assess stress levels in the pipe's outer wall. Allowing curvature at one end gives normal and bending moment stresses that peak near this edge. While the predicted stresses are within material tolerances, the stress elevation is such that the severe heat pipe environment could work in tandem to produce localize... View full abstract»

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