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14041.燃料电池供电物料搬运设备的总体拥有成本评价
[电力、热力、燃气及水生产和供应业,电气机械和器材制造业] [2015-09-01]
Although fuel cell electric vehicles are still are in a pre-commercialization phase, hydrogen fuel cells currently are being used commercially in early market applications such as material handling and backup power. These early commercialization fuel cell deployments are helping improve hydrogen and fuel cell technologies and expanding their market potential. Fuel cell systems look particularly promising as replacements for batteries in material handling equipment (MHE, or more typically forklifts) in warehouse applications where operations extend for two or three shifts each day. In such applications, batteries generally need to be charged and replaced one or more times each day, which complicates logistics and increases overall labor costs. Fuel cell MHE have zero emissions, can operate for more than 12 hours without performance degradation, and can be fueled in minutes, making fuel cells an attractive alternative to conventional battery systems.
关键词:燃料电池;物料搬运设备;电动电池
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14042.烷烃的低温催化CC键活化的便携式电源计算研究
[电力、热力、燃气及水生产和供应业,化学原料和化学制品制造业] [2015-09-01]
The development of a room temperature (<50 C) fuel cell that would use a generally available fuel such as JP8 would be most valuable. However there are no known catalysts that can selectively activate the CC bonds of such fuels at such temperature. The goal of this project was to investigate whether it is plausible to develop such catalysts. To do this we used validated first-principles (quantum mechanics) based simulations to investigate the barriers for alkyl carbon-carbon cleavage for two prototypical systems: A metal alloy catalyst and an organometallic cluster catalyst. That might serve as an anode for electrochemical power generation. For the metal alloy catalyst we used a top-down approach where we determined the bond energies to the alloy catalyst to various fuel fragments necessary to achieve room temperature decomposition of butane and oxidation to CO2. For organometallic cluster catalyst we used a bottom-up strategy, determining specific metals, ligand compositions, solvents and operating conditions to evaluate which conditions could lead to reasonable rates at room temperature.
关键词:烷烃;碳碳复合材料;电力;低温
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14043.洛斯阿拉莫斯国家实验室燃料电池计划
[电气机械和器材制造业,电力、热力、燃气及水生产和供应业] [2015-09-01]
No abstract available.
关键词:燃料电池;项目管理;煤炭;排放;能源消耗
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14044.具有远程监控功能的光伏电池阴极保护系统的演示
[电气机械和器材制造业,电力、热力、燃气及水生产和供应业] [2015-09-01]
This project demonstrated an application of photovoltaic (PV) technology to power cathodic protection (CP) systems for water tanks at Pohakuloa Training Area (PTA), HI. An impressed-current CP system was installed on each of three water tanks in isolated locations, where connecting with the local power grid would be expensive. The demonstrated system, powered only by PV arrays with a battery backup, uses ceramic anodes and includes a satellite-based remote-monitoring capability. This system provides uniform and reliable cathodic protection in the water tanks interior below the water line. Data collected by the remote monitoring system can be loaded into a spreadsheet, and performance can then be analyzed on a pass-fail basis. The installed PV- powered CP systems operate as designed and conform to NACE SP 0169 criteria. It is expected that little maintenance will be needed to keep the system operating properly. Required maintenance will include periodic cleaning solar arrays and monthly recording of electrical output using a digital meter. Once every year, a qualified CP specialist should survey the system to ensure proper CP levels.
关键词:光伏电池;遥控监视;电池阴极
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14045.2012年年度报告——SECA煤基系统LGFCS
[电力、热力、燃气及水生产和供应业,石油加工、炼焦和核燃料加工业] [2015-09-01]
LGFCS is developing an integrated planar (IP) SOFC technology for mega-watt scale power generation including the potential for use in highly efficient, economically competitive central generation power plant facilities fuel by coal synthesis gas. This Department of Energy Solid-State Energy Conversion Alliance (SECA) program is aimed at achieving further cell and stack technical advancements and assessing the readiness of the LGFCS SOFC stack technology to be scaled to larger-scale demonstrations in subsequent phases. LGFCS is currently in Phase 2 of the program with the Phase 1 test carrying over for completion during Phase 2.
关键词:固体氧化物燃料电池;煤;能源转换;燃料
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14046.加州氢能基础设施项目
[电力、热力、燃气及水生产和供应业] [2015-09-01]
Air Products and Chemicals, Inc. has completed a comprehensive, multiyear project to demonstrate a hydrogen infrastructure in California. The specific primary objective of the project was to demonstrate a model of a real-world retail hydrogen infrastructure and acquire sufficient data within the project to assess the feasibility of achieving the nation's hydrogen infrastructure goals. The project helped to advance hydrogen station technology, including the vehicle-to-station fueling interface, through consumer experiences and feedback. By encompassing a variety of fuel cell vehicles, customer profiles and fueling experiences, this project was able to obtain a complete portrait of real market needs. The project also opened its stations to other qualified vehicle providers at the appropriate time to promote widespread use and gain even broader public understanding of a hydrogen infrastructure. The project engaged major energy companies to provide a fueling experience similar to traditional gasoline station sites to foster public acceptance of hydrogen. Work over the course of the project was focused in multiple areas. With respect to the equipment needed, technical design specifications (including both safety and operational considerations) were written, reviewed, and finalized. After finalizing individual equipment designs, complete station designs were started including process flow diagrams and systems safety reviews. Material quotes were obtained, and in some cases, depending on the project status and the lead time, equipment was placed on order and fabrication began.
关键词:替代燃料;加利福尼亚州;燃料电池
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14047.最终报告:纳米复合结构OPV器件经济复苏法案
[电气机械和器材制造业,电力、热力、燃气及水生产和供应业] [2015-09-01]
Abundant for most of the year in most parts of the world, solar energy is the ultimate renewable zero-emission energy source. Combined with improved means of energy storage, it has the potential to supply a quickly increasing fraction of our energy needs. However, its widespread use for electricity generation requires a significant further decrease in cost, which will be difficult to meet with conventional crystalline silicon technology. Allowing for the use of inexpensive, high-speed, large-scale roll-to-roll manufacturing processes, organic photovoltaics (OPV) have a significant chance of quickly becoming an essential factor in electricity generation1, but additional improvements in performance and life-time are needed before large-scale implementation. OPV devices, also called polymer-solar cells (PSC) or polymer-fullerene composite solar cells, are lightweight and can be flexible, opening the possibility for a range of new applications including largearea pliable devices. While power-conversion efficiencies of up to 7.9% have been reported at a laboratory scale, practical maximum efficiencies between 20 and 25% appear to be reasonable. Nanoscale morphology has been identified as an important factor in the optimization of OPV. In addition to tuning the optical and electronic properties of the materials used for light harvesting, carrier generation, transport, and collection, control of the nanoscale morphology of the active layer can alone provide a clear path to power conversion efficiencies of >10%. Tandem devices can certainly dramatically improve overall efficiencies but taking into account their complexity, additional gains can and must be made in single-layer devices.
关键词:复合材料;电;储能;有机材料;;光伏电池
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14048.大面积激光功率转换器的表征和电阻损失缓解
[电气机械和器材制造业,电力、热力、燃气及水生产和供应业] [2015-09-01]
GaAs Laser Power Converters (LPC) were simulated in 2D and 3D under 10 W/cm2 illumination of 810 nm light using Synopsys Sentaurus software revealing significant dependence of effciency on grid metal finger spacings, S, and finger dimensions. Efficiency results were comparable to an experimental efficiency of 53.4% cited in the literature for an LPC under 43 W/cm2 of 810 nm laser light. 2D devices were simulated with S of 20 - 1000 micrometer revealing an efficiency drop, Delta(n), with increasing spacings. The efficiency drop was reduced from Delta(n) of 39.43% at S = 740 micrometer to Delta(n) of 14.38% at S = 1000 micrometer when modifying the window layer to include a highly doped lateral conduction layer (LCL). In the 3D simulations, resistive losses in the grid metal fingers were reduced by thickening the grid metal from 3 micrometer x 0.5 micrometer with an efficiency of 26% at an effective length of 0.5 cm up to 10 micrometer x 5 micrometer, achieving an efficiency of 44.89% at an effective finger length of 1 cm. An LCL and thicker fingers are shown to be critical for designing large area LPCs to convert laser light to electrical power for devices such as small RPAs and tactical sensors.
关键词:光伏反应;太阳能电池;电阻损失
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14049.了解和优化:希瓦氏菌和其他微生物的电力生产机制
[科学研究和技术服务业,电力、热力、燃气及水生产和供应业] [2015-09-01]
In the five years of this MURI program, we have made major advances in several areas, including: (1) power production optimization; (2) MFC design; (3) identification of the genes coding for the proteins involved with electricity production by Shewanella oneidensis (MR-1); (4) construction of conceptual models of extracellular electron transport (EET); (5) characterization and quantification of the per cell rates of EET to solid substrates; (6) characterization of a previously undescribed behavioral adaptation of microbes to charged surfaces called electrokinesis (and the impact of surface charge on bacterial attachment and biofilm formation); (7) the use of Vertical Scanning Interferometry for cell and biofilm analyses; (8) the design and implementation of a new type of (Deep Ultraviolet Light) microscope for non-invasive studies of microbes on surfaces; (9) detailed biophysical studies of the mechanism of electron transfer in conductive appendages called bacterial nanowires, produced by MR-1 and other Shewanella strains and species; (10) characterization of the selective advantages of Shewanella cells in late stationary phase, and the relationship of this metabolic state to the long term function of MFC systems; and, (11) characterization of the activities of microbes acting as catalysts on the cathodes of MFC systems. During this time, we published over *** reviewed papers, presented over 100 talks at scientific meetings, and collaborated with colleagues from around the world.
关键词:电力;微生物;纳米线;生物物理学;电子传递
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14050.电纺磁活化纤维纳米复合材料:生物医学中的制造和应用
[电气机械和器材制造业,电力、热力、燃气及水生产和供应业] [2015-09-01]
Materials capable of responding to external stimuli including pH, temperature, magnetic and electric field, undergoing conformational changes are considered to be one of the most exciting and emerging classes of advanced materials receiving considerable scientific interest especially in the biomedical field. Stimuli-responsive polymers in the form of micro- or nanofibers have received great attention during the last 10 years and have been exploited in a diverse range of biomedical applications such as drug delivery, tissue engineering, bioseparation and biosensing. One of the most popular and versatile fiber fabrication methods used for the production of fibers is electrospinning. Its simplicity, cost-effectiveness and applicability not only to pristine synthetic and natural polymers but also to composites, enables the development of polymer-based fibrous nanocomposites via the combination of polymers with inorganic nanofillers. Among such nanoadditives, magnetic nanoparticles capable of interacting with an externally applied magnetic field, are particularly attractive owing to their potential biomedical applications including magnetically-triggered drug delivery, magnetic cell seeding, magnetic bioseparation, hypothermia cancer treatment and contrast enhancement in magnetic resonance imaging. In this chapter, an introductory section on electrospinning and on different parameters influencing this process is initially provided. The different fabrication routes for generating electrospun magnetoactive polymer-based (nano)fibrous materials are briefly discussed and finally the applicability of these materials in the biomedical field including tissue engineering, drug delivery, hypethermia treatment and biosensing is reviewed.
关键词:电池材料;磁极活性;纳米材料