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

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Post test examination of AMTEC electrodes from sodium exposure test cells 钠暴露试验电池中AMTEC电极的试验后检查
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870857
M. Schuller, B. Fiebig, P. Hudson, A. Williams
{"title":"Post test examination of AMTEC electrodes from sodium exposure test cells","authors":"M. Schuller, B. Fiebig, P. Hudson, A. Williams","doi":"10.1109/IECEC.2000.870857","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870857","url":null,"abstract":"In this paper we discuss electron microprobe results from WRh AMTEC electrodes tested in sodium exposure test cells. We compare and contrast the morphology and elemental distribution of WRh electrodes in the as sputtered condition with those after up to 1250 hours in sodium vapor at temperatures of 800-900/spl deg/C.","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133213977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Laser-induced breakdown spectroscopy in a metal-seeded flame 金属种子火焰中的激光诱导击穿光谱
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870819
Hansheng Zhang, F. Yueh, J. Singh, R.L. Cook, G.W. Loge
{"title":"Laser-induced breakdown spectroscopy in a metal-seeded flame","authors":"Hansheng Zhang, F. Yueh, J. Singh, R.L. Cook, G.W. Loge","doi":"10.1109/IECEC.2000.870819","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870819","url":null,"abstract":"Laser-induced breakdown spectroscopy (LIBS) has been used to detect atomic and molecular species in various environments. It has the capability to be used as a real time monitor in a harsh and turbulent environment. LIBS has been tested at the Diagnostic Instrumentation and Analysis Laboratory's (DIAL) combustion facility to optimize and characterize the LIBS operation in a flame. Three metals, Cu, Fe, and Ca, were injected into the combustor with a peristaltic pump. LIBS spectra were recorded at different delay times with a fixed gate width to determine the best detection gate. LIBS signal in the flame were also compared with the direct emission from the flame. It is found that the LIBS signal is stronger than the signal from the direct emission of the metal in the same flame and the LIBS method has a much better signal over background ratio. To test the calibration scheme, metal solutions were injected into the combustor with different rates. Linear calibration curves were obtained.","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133233153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
DSP-based variable speed motor drive with power factor correction and current harmonics compensation 基于dsp的变速电机驱动，具有功率因数校正和电流谐波补偿
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870956
L. Cheng
{"title":"DSP-based variable speed motor drive with power factor correction and current harmonics compensation","authors":"L. Cheng","doi":"10.1109/IECEC.2000.870956","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870956","url":null,"abstract":"The DSP-based variable speed motor drive consists of an active rectifier and inverter, which generates low current harmonics and low reactive current for efficient power conversion. The active rectifier converts the AC voltage into a regulated DC voltage, and draws input sinusoidal current at near unity power factor. In addition, the output inverter generates a variable frequency PWM synthesised voltage waveform to drive a permanent magnet brushless DC motor at near unity power factor for maximum efficiency. The high efficiency motor drive requires a small passive EMI filter and lower power rating requirements for the electronics switching devices. Therefore, the new DSP-based motor drive can be packaged into a smaller and lighter unit.","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117240276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
High pulse power system through engineering battery-capacitor combination 采用工程电池-电容组合的高脉冲电源系统
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870870
Zheng Chen
{"title":"High pulse power system through engineering battery-capacitor combination","authors":"Zheng Chen","doi":"10.1109/IECEC.2000.870870","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870870","url":null,"abstract":"The advancing technology of thin, lightweight, and high power ultracapacitor has been one of the most exciting and important developments in electronic components. The technology provides a new dimension for engineers and designers to manage the power and energy used in electronic products. The batteries will not have to be oversized to accommodate a peak power demand. A combination of battery and ultracapacitor (hybrid power system) can improve the battery capability for power peak and also extend battery lifetime. In this paper, the author presents an ultra-thin hydra-amorphous ruthenium oxide ultracapacitor. The unique electrochemical characteristics of ultracapacitor are able to provide a much higher pulse current capability over the battery system. The ultracapacitor with 0.1 cm thick, 14 cm/sup 2/ size, and 2.6 g weight has the capability to deliver over 30 W pulse peak. By combination of ultracapacitor and battery, the pulse performance of traditional alkaline primary battery can be significantly improved.","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125958285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Thin-film photovoltaic solar array parametric assessment [space power] 薄膜光伏太阳能阵列参数评估[空间功率]
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870852
D. J. Hoffman, T. Kerslake, A. Hepp, M. Jacobs, D. Ponnusamy
{"title":"Thin-film photovoltaic solar array parametric assessment [space power]","authors":"D. J. Hoffman, T. Kerslake, A. Hepp, M. Jacobs, D. Ponnusamy","doi":"10.1109/IECEC.2000.870852","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870852","url":null,"abstract":"This paper summarizes a study that had the objective to develop a model and parametrically determine the circumstances for which lightweight thin-film photovoltaic solar arrays would be more beneficial, in terms of mass and cost, than arrays using high-efficiency crystalline solar cells. Previous studies considering arrays with near-term thin-film technology for Earth orbiting applications are briefly reviewed. The present study uses a parametric approach that evaluated the performance of lightweight thin-film arrays with cell efficiencies ranging from 5% to 20%. The model developed for this study is described in some detail. Similar mass and cost trends for each array option were found across eight missions of various power levels in locations ranging from Venus to Jupiter. The paper concludes with the observation that with the characteristics assumed for this study, ultra-lightweight arrays using efficient, thin-film cells on flexible substrates may become a leading alternative for a wide variety of space missions.","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129896586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Thermodynamic analysis of chemically reacting systems; choice of a reference state for exergy 化学反应体系的热力学分析;能量参考状态的选择
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870888
G. Bisio, G. Rubatto
{"title":"Thermodynamic analysis of chemically reacting systems; choice of a reference state for exergy","authors":"G. Bisio, G. Rubatto","doi":"10.1109/IECEC.2000.870888","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870888","url":null,"abstract":"The environmental state of reference plays a substantial role in the calculation of exergy of chemically reacting systems and in general of advanced combined systems. However, the definition of the reference system is problematic, since the environment is not in equilibrium. If a nonequilibrium system is chosen, parts of the environment possess exergy in respect to one another. On the other hand, an environment that is in equilibrium precludes the presence of energy sources and deposit of raw materials, and thus prevents the occurrence of those processes whose effectiveness one is examining. No reference state exists, which satisfies the two requirements to the same extent. The aim of this paper is firstly an examination of the conditions that the classical definition of exergy mandates: the system must be in a state of internal unrestricted equilibrium and the environment must be in state of internal unrestricted equilibrium, which does not change during time. Then, the possible choices of an exergy reference state for chemically reacting systems on the basis of the recent literature are critically examined. Subsequently, some remarks are made on the most suitable formulation of exergy efficiency for these systems.","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128285266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Thermodynamic analysis of heat engine with a Knudsen-effect pressure generator 带克努森效应压力发生器的热机热力学分析
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870889
G. Bisio, G. Rubatto
{"title":"Thermodynamic analysis of heat engine with a Knudsen-effect pressure generator","authors":"G. Bisio, G. Rubatto","doi":"10.1109/IECEC.2000.870889","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870889","url":null,"abstract":"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 not be surprised that in some cases it is possible to obtain work in a continuous process with only one work exchanger. A new pressure generator for a heat engine, which has been recently proposed, is one of these cases. The device works on the basis of the thermal transport of gas according to the \"Knudsen effect\".","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"52 Pt 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128901717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optical efficiency of a refractive secondary concentrator 折射率二次聚光器的光学效率
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870917
D.A. Jaworske, T. Skowronski
{"title":"Optical efficiency of a refractive secondary concentrator","authors":"D.A. Jaworske, T. Skowronski","doi":"10.1109/IECEC.2000.870917","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870917","url":null,"abstract":"Refractive secondary concentrators are being considered as an optical component in solar thermal power and propulsion systems. To evaluate the impact of a refractive secondary concentrator on the overall efficiency of the optical system, the optical efficiency of an acrylic refractive secondary concentrator prototype was evaluated on an optics bench. Light from a laser was allowed to enter the refractive secondary concentrator from a variety of positions, and an integrating sphere was used to collect the exiting light. Energy output of the refractive secondary concentrator was compared to energy input. Several mathematical models were used to describe potential flux distributions impinging on the front surface of the refractive secondary concentrator. For uniform illumination, the optical throughput was found to be 0.874. Different flux profiles resulted in optical throughputs in the range of 0.857 to 0.889. An antireflective coating added to the refractive secondary concentrator should increase optical throughput further.","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130477250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Update on the evaluation of different correlations for the flow friction factor and heat transfer of Stirling engine regenerators 斯特林发动机蓄热器流动摩擦系数与传热的不同相关性评估进展
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870632
B. Thomas, D. Pittman
{"title":"Update on the evaluation of different correlations for the flow friction factor and heat transfer of Stirling engine regenerators","authors":"B. Thomas, D. Pittman","doi":"10.1109/IECEC.2000.870632","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870632","url":null,"abstract":"This paper is intended to update the overview of different correlations for the friction factor and heat transfer of Stirling engine regenerators given by the Oscillating-Flow Regenerator Test Rig data. For that purpose the data was recalculated using the general applicable set of equations for Reynolds number, friction factor, pressure drop, Nusselt number and heat transfer area. Based on these general definitions, the correlations can be shown in one plot for the flow friction factor and one plot for the Nusselt number, giving a good impression of their characteristics and the deviations among them, which are discussed in the body of this paper.","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126777095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 47
Prototype solar panel development and testing for a Mercury orbiter spacecraft 为水星轨道飞行器开发和测试原型太阳能电池板
Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI: 10.1109/IECEC.2000.870725
C. Ercol, J. Jenkins, G. Dakermanji, A. Santo, L. Mason
{"title":"Prototype solar panel development and testing for a Mercury orbiter spacecraft","authors":"C. Ercol, J. Jenkins, G. Dakermanji, A. Santo, L. Mason","doi":"10.1109/IECEC.2000.870725","DOIUrl":"https://doi.org/10.1109/IECEC.2000.870725","url":null,"abstract":"A Mercury orbiting spacecraft imposes many design challenges in the area of spacecraft thermal control and electrical power generation. The discovery mission MESSENGER (Mercury Surface, Space, Environment, Geochemistry, and Ranging), being designed and built by the Johns Hopkins University Applied Physics Laboratory (APL), will orbit and survey the planet Mercury for one year. In order to reduce cost and schedule risk while increasing the probability for mission success, the MESSENGER solar arrays will be constructed from conventional \"off the shelf\" materials and technologies.","PeriodicalId":224191,"journal":{"name":"Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116129614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
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