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Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

SunShot Initiative: High-Concentration, Low-Cost Parabolic Trough...  

NLE Websites -- All DOE Office Websites (Extended Search)

High-Concentration, Low-Cost Parabolic Trough System for Baseload CSP to someone by E-mail Share SunShot Initiative: High-Concentration, Low-Cost Parabolic Trough System for...

2

Low Cost High Concentration PV Systems for Utility Power Generation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Other Agencies You are here Home Low Cost High Concentration PV Systems for Utility Power Generation Low Cost High Concentration PV Systems for Utility Power Generation An...

3

Low Cost High Concentration PV Systems for Utility Power Generation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Other Agencies You are here Home Low Cost High Concentration PV Systems for Utility Power Generation Amonix, Inc. Low Cost High Concentration PV Systems for Utility Power...

4

SunShot Initiative: Advanced Low-Cost Receivers for Parabolic...  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Low-Cost Receivers for Parabolic Troughs to someone by E-mail Share SunShot Initiative: Advanced Low-Cost Receivers for Parabolic Troughs on Facebook Tweet about SunShot...

5

Low Cost High Concentration PV Systems for Utility Power Generation Amonix,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Amonix, Inc. Amonix, Inc. Low Cost High Concentration PV Systems for Utility Power Generation Amonix, Inc. A series of brief fact sheet on various topics including:Low Cost High Concentration PV Systems for Utility Power Generation,High Efficiency Concentrating Photovoltaic Power System,Reaching Grid Parity Using BP Solar Crystalline Silicon Technology, Fully Integrated Building Science Solutions for Residential and Commercial Photovoltaic Energy Generation,A Value Chain Partnership to Accelerate U.S. Photovoltaic Industry Growth,AC Module PV System,Flexible Organic Polymer-Based PV For Building Integrated Commercial Applications,Flexable Integrated PV System,Delivering Grid-Parity Solar Electricity On Flat Commercial Rooftops,Fully Automated Systems Technology, Concentrating Solar Panels: Bringing the Highest Power and Lowest Cost to

6

Low-Cost High-Concentration Photovoltaic Systems for Utility Power Generation  

DOE Green Energy (OSTI)

Under DOE's Technology Pathway Partnership (TPP) program, Amonix, Inc. developed a new generation of high-concentration photovoltaic systems using multijunction technology and established the manufacturing capacity needed to supply multi-megawatt power plants buing using the new Amonix 7700-series solar energy systems. For this effort, Amonix Collaborated with a variety of suppliers and partners to complete project tasks. Subcontractors included: Evonik/Cyro; Hitek; the National Renewable Energy Laboratory (NREL); Raytech; Spectrolab; UL; University of Nevada, Las Vegas; and TUV Rheinland PTL. The Amonix TPP tasks included: Task 1: Multijunction Cell Optimization for Field Operation, Task 2: Fresnel Lens R&D, Task 3: Cell Package Design & Production, Task 4: Standards Compliance and Reliability Testing, Task 5: Receiver Plate Production, Task 6: MegaModule Performance, Task 7: MegaModule Cost Reduction, Task 8: Factory Setup and MegaModule Production, Task 9: Tracker and Tracking Controller, Task 10: Installation and Balance of System (BOS), Task 11: Field Testing, and Task 12: Solar Advisor Modeling and Market Analysis. Amonix's TPP addressed nearly the complete PV value chain from epitaxial layer design and wafer processing through system design, manufacturing, deployment and O&M. Amonix has made progress toward achieving these reduced costs through the development of its 28%+ efficient MegaModule, reduced manufacturing and installation cost through design for manufacturing and assembly, automated manufacturing processes, and reduced O&M costs. Program highlights include: (1) Optimized multijunction cell and cell package design to improve performance by > 10%; (2) Updated lens design provided 7% increased performance and higher concentration; (3) 28.7% DC STC MegaModule efficiency achieved in Phase II exceeded Phase III performance goal; (4) New 16' focal length MegaModule achieved target materials and manufacturing cost reduction; (5) Designed and placed into production 25 MW/yr manufacturing capacity for complete MegaModules, including cell packages, receiver plates, and structures with lenses; (6) Designed and deployed Amonix 7700 series systems rated at 63 kW PTC ac and higher. Based on an LCOE assessment using NREL's Solar Advisor Model, Amonix met DOE's LCOE targets: Amonix 2011 LCOE 12.8 cents/kWh (2010 DOE goal 10-15); 2015 LCOE 6.4 cents/kWh (2015 goal 5-7) Amonix and TPP participants would like to thank the U.S. Department of Energy Solar Energy Technology Program for funding received under this program through Agreement No. DE-FC36-07GO17042.

McConnell, R.; Garboushian, V.; Gordon, R.; Dutra, D.; Kinsey, G.; Geer, S.; Gomez, H.; Cameron, C.

2012-03-31T23:59:59.000Z

7

High concentration two-stage optics for parabolic trough solar collectors with tubular absorber and large rim angle  

SciTech Connect

A new two-stage optical design is proposed for parabolic trough solar collectors with tubular absorbers. It can boost the concentration ratio by a factor of 2.5 relative to the conventional design, while maintaining the large rim angles (i.e., low nominal f-numbers) that are desirable for practical and economical reasons. The second state involves asymmetric nonimaging concentrators of the CPC type, facing segments of the parabolic first stage. The second stage can be accommodated inside an evacuated receiver, allowing the use of first-surface silvered reflectors. The low heat loss of this design opens the possibility of producing steam at temperatures and pressures of conventional power plants, using only one-axis tracking. The improvement in conversion efficiency would be substantial.

Collares-Pereira, M. (Centro para a Conservacao de Energia, Amadora (Portugal)); Gordon, J.M. (Ben Gurion Univ. of the Negev, Beersheva (Israel)); Rabl, A. (Centre d'Energetique, Paris (France)); Winston, R. (Univ. of Chicago, IL (United States))

1991-01-01T23:59:59.000Z

8

Low Cost, Durable Seal  

NLE Websites -- All DOE Office Websites (Extended Search)

Cost, Durable Seal Cost, Durable Seal George M. Roberts UTC Power Corporation February 14, 2007 This presentation does not contain any proprietary or confidential information 1 LOW COST, DURABLE SEAL Outline * Project Objective * Technical Approach * Timeline * Team Roles * Budget * Q&A 2 LOW COST, DURABLE SEAL Project Objective Develop advanced, low cost, durable seal materials and sealing techniques amenable to high volume manufacture of PEM cell stacks. DOE Targets/Goals/Objectives Project Goal Durability Transportation: 5,000 hr Stationary: 40,000 hr Durability Improve mechanical and chemical stability to achieve 40,000 hr of useful operating life. Low Cost Low Cost A material cost equivalent to or less than the cost of silicones in common use. 3 LOW COST, DURABLE SEAL

9

Low Cost, Durable Seal  

SciTech Connect

Seal durability is critical to achieving the 2010 DOE operational life goals for both stationary and transportation PEM fuel cell stacks. The seal material must be chemically and mechanically stable in an environment consisting of aggressive operating temperatures, humidified gases, and acidic membranes. The seal must also be producible at low cost. Currentlyused seal materials do not meet all these requirements. This project developed and demonstrated a high consistency hydrocarbon rubber seal material that was able to meet the DOE technical and cost targets. Significant emphasis was placed on characterization of the material and full scale molding demonstrations.

Roberts, George; Parsons, Jason; Friedman, Jake

2010-12-17T23:59:59.000Z

10

Low-Cost, Lightweight Solar Concentrators  

NLE Websites -- All DOE Office Websites (Extended Search)

Concentrators Concentrators California Institute of Technology/Jet Propulsion Laboratory Award Number:0595-1612 | January 15, 2013 | Ganapathi Thin Film mirror is ~40-50% cheaper and 60% lighter than SOA * Project leverages extensive space experience by JPL and L'Garde to develop a low-cost parabolic dish capable of providing 4 kW thermal. Key features: * Metallized reflective thin film material with high reflectivity (>93%) with polyurethane foam backing * Single mold polyurethane backing fabrication enables low cost high production manufacturing * Ease of panel installation and removal enables repairs and results in a low total life cycle cost * Deployment of multiple dishes enhances system level optimizations by simulating larger fields which addresses issues like shared resources

11

Parabolic trough solar collectors : design for increasing efficiency  

E-Print Network (OSTI)

Parabolic trough collectors are a low cost implementation of concentrated solar power technology that focuses incident sunlight onto a tube filled with a heat transfer fluid. The efficiency and cost of the parabolic trough ...

Figueredo, Stacy L. (Stacy Lee), 1981-

2011-01-01T23:59:59.000Z

12

Parabolic trough solar collectors : design for increasing efficiency.  

E-Print Network (OSTI)

??Parabolic trough collectors are a low cost implementation of concentrated solar power technology that focuses incident sunlight onto a tube filled with a heat transfer… (more)

Figueredo, Stacy L. (Stacy Lee), 1981-

2011-01-01T23:59:59.000Z

13

Advanced Low-Cost Receivers for Parabolic Troughs (Fact Sheet)  

Science Conference Proceedings (OSTI)

Norwich Technologies is one of the 2012 SunShot CSP R&D awardees for their advanced receivers. This fact sheet explains the motivation, description, and impact of the project.

Not Available

2012-09-01T23:59:59.000Z

14

Low Cost Nanomaterials for PV Devices  

Impact: Low-cost solution for solar energy (Expand to lighting, batteries, etc) Low-cost Nanomaterials for PV Devices . Title: Slide 1 Author: Donna ...

15

Research and Development of a Low Cost Solar Collector  

Science Conference Proceedings (OSTI)

This is a Final Technical Report on the Research and Development completed towards the development of a Low Cost Solar Collector conducted under the DOE cost-sharing award EE-0003591. The objective of this project was to develop a new class of solar concentrators with geometries and manufacturability that could significantly reduce the fully installed cost of the solar collector field for concentrated solar thermal power plants. The goal of the project was to achieve an aggressive cost target of $170/m2, a reduction of up to 50% in the total installed cost of a solar collector field as measured against the current industry benchmark of a conventional parabolic trough. The project plan, and the detailed activities conducted under the scope of the DOE Award project addressed all major drivers that affect solar collector costs. In addition to costs, the study also focused on evaluating technical performance of new collector architectures and compared them to the performance of the industry benchmark parabolic trough. The most notable accomplishment of this DOE award was the delivery of a full-scale integrated design, manufacturing and field installation solution for a new class of solar collector architecture which has been classified as the Bi-Planar Fresnel Collector (BPFC) and may be considered as a viable alternative to the conventional parabolic trough, as well as the conventional Fresnel collectors. This was in part accomplished through the design and development, all the way through fabrication and test validation of a new class of Linear Planar Fresnel Collector architecture. This architecture offers a number of key differentiating features which include a planar light-weight frame geometry with small mass-manufacturable elements utilizing flat mirror sections. The designs shows significant promise in reducing the material costs, fabrication costs, shipping costs, and on-site field installation costs compared to the benchmark parabolic trough, as well as the conventional Fresnel collector. The noteworthy design features of the BPFC architecture include the use of relatively cheaper flat mirrors and a design which allows the mirror support beam sections to act as load-bearing structural elements resulting in more than a 36% reduction in the overall structural weight compared to an optimized parabolic trough. Also, it was shown that the utilization of small mass-produced elements significantly lowers mass-production and logistics costs that can more quickly deliver economies of scale, even for smaller installations while also reducing shipping and installation costs. Moreover, unlike the traditional Fresnel trough the BPFC architecture does not require complex articulating drive mechanisms but instead utilizes a standard parabolic trough hydraulic drive mechanism. In addition to the development of the Bi-Planar Fresnel Collector, an optimized conventional space-frame type parabolic trough was also designed, built, analyzed and field-tested during the first phase of this award. The design of the conventional space-frame parabolic collector was refined with extensive FEA and CFD analysis to reduce material costs and re-designed for simpler fabrication and more accurate lower-cost field assembly. This optimized parabolic trough represented an improvement over the state-of-the art of the traditional parabolic trough architecture and also served as a more rigorous and less subjective benchmark that was used for comparison of new candidate design architectures. The results of the expanded 1st phase of the DOE award project showed that both the Optimized Parabolic Trough and the new Bi-Planar Fresnel Collector design concepts failed to meet the primary objectives for the project of achieving a 50% cost reduction from the industry reference total installed cost of $350/m2. Results showed that the BPFC came in at projected total installed cost of $237/m2 representing a 32% savings compared to the industry benchmark conventional parabolic trough. And the cost reduction obtained by the Optimized Parabolic Trough compared to the

Ansari, Asif; Philip, Lee; Thouppuarachchi, Chirath

2012-08-01T23:59:59.000Z

16

Research and Development of a Low Cost Solar Collector  

SciTech Connect

This is a Final Technical Report on the Research and Development completed towards the development of a Low Cost Solar Collector conducted under the DOE cost-sharing award EE-0003591. The objective of this project was to develop a new class of solar concentrators with geometries and manufacturability that could significantly reduce the fully installed cost of the solar collector field for concentrated solar thermal power plants. The goal of the project was to achieve an aggressive cost target of $170/m2, a reduction of up to 50% in the total installed cost of a solar collector field as measured against the current industry benchmark of a conventional parabolic trough. The project plan, and the detailed activities conducted under the scope of the DOE Award project addressed all major drivers that affect solar collector costs. In addition to costs, the study also focused on evaluating technical performance of new collector architectures and compared them to the performance of the industry benchmark parabolic trough. The most notable accomplishment of this DOE award was the delivery of a full-scale integrated design, manufacturing and field installation solution for a new class of solar collector architecture which has been classified as the Bi-Planar Fresnel Collector (BPFC) and may be considered as a viable alternative to the conventional parabolic trough, as well as the conventional Fresnel collectors. This was in part accomplished through the design and development, all the way through fabrication and test validation of a new class of Linear Planar Fresnel Collector architecture. This architecture offers a number of key differentiating features which include a planar light-weight frame geometry with small mass-manufacturable elements utilizing flat mirror sections. The designs shows significant promise in reducing the material costs, fabrication costs, shipping costs, and on-site field installation costs compared to the benchmark parabolic trough, as well as the conventional Fresnel collector. The noteworthy design features of the BPFC architecture include the use of relatively cheaper flat mirrors and a design which allows the mirror support beam sections to act as load-bearing structural elements resulting in more than a 36% reduction in the overall structural weight compared to an optimized parabolic trough. Also, it was shown that the utilization of small mass-produced elements significantly lowers mass-production and logistics costs that can more quickly deliver economies of scale, even for smaller installations while also reducing shipping and installation costs. Moreover, unlike the traditional Fresnel trough the BPFC architecture does not require complex articulating drive mechanisms but instead utilizes a standard parabolic trough hydraulic drive mechanism. In addition to the development of the Bi-Planar Fresnel Collector, an optimized conventional space-frame type parabolic trough was also designed, built, analyzed and field-tested during the first phase of this award. The design of the conventional space-frame parabolic collector was refined with extensive FEA and CFD analysis to reduce material costs and re-designed for simpler fabrication and more accurate lower-cost field assembly. This optimized parabolic trough represented an improvement over the state-of-the art of the traditional parabolic trough architecture and also served as a more rigorous and less subjective benchmark that was used for comparison of new candidate design architectures. The results of the expanded 1st phase of the DOE award project showed that both the Optimized Parabolic Trough and the new Bi-Planar Fresnel Collector design concepts failed to meet the primary objectives for the project of achieving a 50% cost reduction from the industry reference total installed cost of $350/m2. Results showed that the BPFC came in at projected total installed cost of $237/m2 representing a 32% savings compared to the industry benchmark conventional parabolic trough. And the cost reduction obtained by the Optimized Parabolic Trough compared to the

Ansari, Asif; Philip, Lee; Thouppuarachchi, Chirath

2012-08-01T23:59:59.000Z

17

Low Cost Hydrogen Production Platform  

DOE Green Energy (OSTI)

A technology and design evaluation was carried out for the development of a turnkey hydrogen production system in the range of 2.4 - 12 kg/h of hydrogen. The design is based on existing SMR technology and existing chemical processes and technologies to meet the design objectives. Consequently, the system design consists of a steam methane reformer, PSA system for hydrogen purification, natural gas compression, steam generation and all components and heat exchangers required for the production of hydrogen. The focus of the program is on packaging, system integration and an overall step change in the cost of capital required for the production of hydrogen at small scale. To assist in this effort, subcontractors were brought in to evaluate the design concepts and to assist in meeting the overall goals of the program. Praxair supplied the overall system and process design and the subcontractors were used to evaluate the components and system from a manufacturing and overall design optimization viewpoint. Design for manufacturing and assembly (DFMA) techniques, computer models and laboratory/full-scale testing of components were utilized to optimize the design during all phases of the design development. Early in the program evaluation, a review of existing Praxair hydrogen facilities showed that over 50% of the installed cost of a SMR based hydrogen plant is associated with the high temperature components (reformer, shift, steam generation, and various high temperature heat exchange). The main effort of the initial phase of the program was to develop an integrated high temperature component for these related functions. Initially, six independent concepts were developed and the processes were modeled to determine overall feasibility. The six concepts were eventually narrowed down to the highest potential concept. A US patent was awarded in February 2009 for the Praxair integrated high temperature component design. A risk analysis of the high temperature component was conducted to identify any potential design deficiency related to the concept. The analysis showed that no fundamental design flaw existed with the concept, but additional simulations and prototypes would be required to verify the design prior to fabricating a production unit. These identified risks were addressed in detail during Phase II of the development program. Along with the models of the high temperature components, a detailed process and 3D design model of the remainder of system, including PSA, compression, controls, water treatment and instrumentation was developed and evaluated. Also, in Phase II of the program, laboratory/fullscale testing of the high temperature components was completed and stable operation/control of the system was verified. The overall design specifications and test results were then used to develop accurate hydrogen costs for the optimized system. Praxair continued development and testing of the system beyond the Phase II funding provided by the DOE through the end of 2008. This additional testing is not documented in this report, but did provide significant additional data for development of a prototype system as detailed in the Phase III proposal. The estimated hydrogen product costs were developed (2007 basis) for the 4.8 kg/h system at production rates of 1, 5, 10, 100 and 1,000 units built per year. With the low cost SMR approach, the product hydrogen costs for the 4.8 kg/h units at 50 units produced per year were approximately $3.02 per kg. With increasing the volume production to 1,000 units per year, the hydrogen costs are reduced by about 12% to $2.67 per kg. The cost reduction of only 12% is a result of significant design and fabrication efficiencies being realized in all levels of production runs through utilizing the DFMA principles. A simplified and easily manufactured design does not require large production volumes to show significant cost benefits. These costs represent a significant improvement and a new benchmark in the cost to produce small volume on-site hydrogen using existing process technologies. The cost mo

Timothy M. Aaron, Jerome T. Jankowiak

2009-10-16T23:59:59.000Z

18

A low cost high flux solar simulator  

E-Print Network (OSTI)

A low cost, high flux, large area solar simulator has been designed, built and characterized for the purpose of studying optical melting and light absorption behavior of molten salts. Seven 1500 W metal halide outdoor ...

Codd, Daniel S.

19

Parabolic Scaling and Curvelets Beyond Parabolic Scaling  

E-Print Network (OSTI)

Parabolic Scaling and Curvelets Beyond Parabolic Scaling Cubic Scaling for Caustics and Tangential on Imaging Science Hart F. Smith Cubic Scaling for Caustics and Tangential Reflections #12;Parabolic Scaling and Curvelets Beyond Parabolic Scaling The Second Dyadic Decomposition Wave-Evolution of Curvelets Second Dyadic

Smith, Hart F.

20

Durable, Low Cost, Improved Fuel Cell Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Durable, Low-cost, Improved Durable, Low-cost, Improved Fuel Cell Membranes US Department of Energy Office of Hydrogen, Fuel Cells and Infrastructure Technologies Kickoff Meeting, Washington DC, February 13, 2007 Michel Fouré Project Objectives z To develop a low cost (vs. perfluorosulfonated ionomers), durable membrane. z To develop a membrane capable at 80°C at low relative humidity (25-50%). z To develop a membrane capable of operating at 120°C for brief periods of time. z To elucidate membrane degradation and failure mechanisms. U:jen/slides/pres.07/FC kickoff Washington DC 2-13-07 2 Technical Barriers Addressed z Membrane Cost z Membrane Durability z Membrane capability to operate at low relative humidity. z Membrane capability to operate at 120ºC for brief period of times.

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Low-Cost Installation of Concentrating Photovoltaic  

E-Print Network (OSTI)

Low-Cost Installation of Concentrating Photovoltaic Renewable Energy Research Renewable Energy Research http://www.energy.ca.gov/research/renewabl e/index.html August 2011 The Issue Several factors inhibit the potential growth of the California photovoltaic market: high installation costs, expenses

22

Low-cost nanosecond electronic coincidence detector  

E-Print Network (OSTI)

We present a simple and low-cost implementation of a fast electronic coincidence detector based on PECL logic with a TTL-compatible interface. The detector has negligible dead time and the coincidence window is adjustable with a minimum width of 1 ns. Coincidence measurements of two independent sources of Bose-Einstein distributed photocounts are presented using different coincidence window widths.

Kim, T; Gorelik, P V; Wong, F N C; Kim, Taehyun; Fiorentino, Marco; Gorelik, Pavel V.; Wong, Franco N. C.

2005-01-01T23:59:59.000Z

23

Low-cost inertial measurement unit.  

Science Conference Proceedings (OSTI)

Sandia National Laboratories performs many expensive tests using inertial measurement units (IMUs)--systems that use accelerometers, gyroscopes, and other sensors to measure flight dynamics in three dimensions. For the purpose of this report, the metrics used to evaluate an IMU are cost, size, performance, resolution, upgradeability and testing. The cost of a precision IMU is very high and can cost hundreds of thousands of dollars. Thus the goals and results of this project are as follows: (1) Examine the data flow in an IMU and determine a generic IMU design. (2) Discuss a high cost IMU implementation and its theoretically achievable results. (3) Discuss design modifications that would save money for suited applications. (4) Design and implement a low cost IMU and discuss its theoretically achievable results. (5) Test the low cost IMU and compare theoretical results with empirical results. (6) Construct a more streamlined printed circuit board design reducing noise, increasing capabilities, and constructing a self-contained unit. Using these results, we can compare a high cost IMU versus a low cost IMU using the metrics from above. Further, we can examine and suggest situations where a low cost IMU could be used instead of a high cost IMU for saving cost, size, or both.

Deyle, Travis Jay

2005-03-01T23:59:59.000Z

24

Parabolic geometries BGG sequences  

E-Print Network (OSTI)

Parabolic geometries BGG sequences Prolongation procedures BGG Sequences and Geometric sequences and overdetermined systems #12;Parabolic geometries BGG sequences Prolongation procedures Parabolic geometries are a large class of differential geometric structures, which can be described

Drmota, Michael

25

Parabolic Quantum Cloak.  

E-Print Network (OSTI)

??It is shown that the parabolic quantum cloak can be theoretically design by using âtransformation design methodâ. We discuss the possibility to build a parabolic… (more)

Chang, Yu-Hsuan

2013-01-01T23:59:59.000Z

26

Low-cost laser diode array  

DOE Patents (OSTI)

A substrate is used to fabricate a low-cost laser diode array. A substrate is machined from an electrically insulative material that is thermally conductive, or two substrates can be bonded together in which the top substrate is electrically as well as thermally conductive. The substrate thickness is slightly longer than the cavity length, and the width of the groove is wide enough to contain a bar and spring (which secures the laser bar firmly along one face of the groove). The spring also provides electrical continuity from the backside of the bar to the adjacent metalization layer on the laser bar substrate. Arrays containing one or more bars can be formed by creating many grooves at various spacings. Along the groove, many bars can be adjoined at the edges to provide parallel electrical conduction. This architecture allows precise and predictable registration of an array of laser bars to a self-aligned microlens array at low cost. 19 figs.

Freitas, B.L.; Skidmore, J.A.

1999-06-01T23:59:59.000Z

27

Low-cost laser diode array  

DOE Patents (OSTI)

A substrate is used to fabricate a low-cost laser diode array. A substrate is machined from an electrically insulative material that is thermally conductive, or two substrates can be bonded together in which the top substrate is electrically as well as thermally conductive. The substrate thickness is slightly longer than the cavity length, and the width of the groove is wide enough to contain a bar and spring (which secures the laser bar firmly along one face of the groove). The spring also provides electrical continuity from the backside of the bar to the adjacent metalization layer on the laser bar substrate. Arrays containing one or more bars can be formed by creating many grooves at various spacings. Along the groove, many bars can be adjoined at the edges to provide parallel electrical conduction. This architecture allows precise and predictable registration of an array of laser bars to a self-aligned microlens array at low cost.

Freitas, Barry L. (Livermore, CA); Skidmore, Jay A. (Livermore, CA)

1999-01-01T23:59:59.000Z

28

The parabolic Harnack inequality  

E-Print Network (OSTI)

The parabolic Harnack inequality on metric graphs Sebastian Haeseler 1. Basic definitions 2. Volume-doubling properties 3. Poincar´e inequalities 4. The parabolic Harnack inequality 5. Examples The parabolic Harnack parabolic Harnack inequality on metric graphs Sebastian Haeseler 1. Basic definitions 2. Volume

Novak, Erich

29

Properties of low cost, high volume glasses  

DOE Green Energy (OSTI)

The properties of new and weathered samples of low cost, high volume glasses have been studied to determine their usefulness for solar energy applications. Glasses of varying compositions produced by float, drawn, rolled fusion, and twin ground techniques were examined. Spectral transmittance and reflectance were measured and solar weighted values calculated. Laser raytrace techniques were used to evaluate surface parallelism and bulk homogeneity. Compositional changes were examined with scanning electron microscopy, x-ray fluorescence, and Auger electron spectroscopy. These techniques were used in conjunction with ellipsometry to study the surface effects associated with weathering.

Lind, M. A.; Hartman, J. S.; Buckwalter, C. Q.

1979-01-01T23:59:59.000Z

30

Parabolic Raynaud bundles  

E-Print Network (OSTI)

Let X be an irreducible smooth projective curve defined over complex numbers, S= {p_1, p_2,...,p_n} \\subset X$ a finite set of closed points and N > 1 a fixed integer. For any pair (r,d) in Z X Z/N, there exists a parabolic vector bundle R_{r,d,*} on X, with parabolic structure over S and all parabolic weights in Z/N, that has the following property: Take any parabolic vector bundle E_* of rank r on X whose parabolic points are contained in S, all the parabolic weights are in Z/N and the parabolic degree is d. Then E_* is parabolic semistable if and only if there is no nonzero parabolic homomorphism from R_{r,d,*} to E_*.

Biswas, Indranil

2007-01-01T23:59:59.000Z

31

Low-Cost, Lightweight Solar Concentrators  

NLE Websites -- All DOE Office Websites (Extended Search)

Concentrators Concentrators California Institute of Technology/Jet Propulsion Laboratory Award Number:0595-1612 | April 18, 2013 | Ganapathi * Mirror module development has been approached with the goal of being applicable to all types of CSP systems * Several heliostat design options being considered to address driving requirements: * Facets that are compliant to winds > 35 mph * Deep structures for optimizing structural efficiency * Pointing accuracy achieved with mechanism design * Simple precision components * Easy on-site assembly with pre-fab components * Structural foam properties and strengthening trades being conducted to reduce overall costs with FEM models Goal: Typical costs for a concentrator (heliostat or parabolic dish) can range between 40-50% of the total costs. To meet SunShot

32

Parabolic-like maps  

E-Print Network (OSTI)

In this paper we introduce the notion of parabolic-like mapping, which is an object similar to a polynomial-like mapping, but with a parabolic external class, i.e. an external map with a parabolic fixed point. We prove a straightening theorem for parabolic-like maps, which states that any parabolic-like map of degree 2 is hybrid conjugate to a member of the family Per_1(1), and this member is unique (up to holomorphic conjugacy) if the filled Julia set of the parabolic-like map is connected.

Lomonaco, Luciana Luna Anna

2011-01-01T23:59:59.000Z

33

SunShot Initiative: Low-Cost Heliostat Development  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-Cost Heliostat Development to Low-Cost Heliostat Development to someone by E-mail Share SunShot Initiative: Low-Cost Heliostat Development on Facebook Tweet about SunShot Initiative: Low-Cost Heliostat Development on Twitter Bookmark SunShot Initiative: Low-Cost Heliostat Development on Google Bookmark SunShot Initiative: Low-Cost Heliostat Development on Delicious Rank SunShot Initiative: Low-Cost Heliostat Development on Digg Find More places to share SunShot Initiative: Low-Cost Heliostat Development on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative CSP Heat Integration for Baseload Renewable Energy Deployment National Laboratory Research & Development

34

SunShot Initiative: Low-Cost Solar Thermal Collector  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-Cost Solar Thermal Collector Low-Cost Solar Thermal Collector to someone by E-mail Share SunShot Initiative: Low-Cost Solar Thermal Collector on Facebook Tweet about SunShot Initiative: Low-Cost Solar Thermal Collector on Twitter Bookmark SunShot Initiative: Low-Cost Solar Thermal Collector on Google Bookmark SunShot Initiative: Low-Cost Solar Thermal Collector on Delicious Rank SunShot Initiative: Low-Cost Solar Thermal Collector on Digg Find More places to share SunShot Initiative: Low-Cost Solar Thermal Collector on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative CSP Heat Integration for Baseload Renewable Energy Deployment National Laboratory Research & Development

35

SunShot Initiative: Low-Cost, Lightweight Solar Concentrators  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-Cost, Lightweight Solar Concentrators to someone by E-mail Share SunShot Initiative: Low-Cost, Lightweight Solar Concentrators on Facebook Tweet about SunShot Initiative:...

36

NETL: Syngas Processing Systems - Low-cost, Environmental Friendly...  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-cost, Environmental Friendly Thermal Storage for CO2 Sequestration Project Number: DE-SC00008425 Creare, Inc. has designed a compact, low-cost, reversible Combined Thermal and...

37

The potential for low-cost airlines in Asia  

E-Print Network (OSTI)

The purpose of this thesis is to assess the potential for low-cost airlines in Asia. Low-cost airlines have been very successful in North America and Europe and have significantly impacted the airline industry and its ...

Dietlin, Philipp, 1979-

2004-01-01T23:59:59.000Z

38

A HIGH PERFORMANCE/LOW COST ACCELERATOR CONTROL SYSTEM  

E-Print Network (OSTI)

LOW COST ACCELERATOR CONTROL SYSTEM S. Hagyary, J. Glat£» H.LOW COST ACCELERATOR CONTROL SYSTEM S. Magyary, J. Glatz, H.a high performance computer control system tailored to the

Magyary, S.

2010-01-01T23:59:59.000Z

39

Low Cost Titanium Powder Development for Additive Manufacturing ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2013 TMS Annual Meeting & Exhibition. Symposium , Cost Affordable Titanium IV. Presentation Title, Low Cost Titanium Powder ...

40

Hot Electron Photovoltaics Using Low Cost Materials and Simple ...  

Hot Electron Photovoltaics Using Low Cost Materials and Simple Cell Design Lawrence Berkeley National Laboratory. Contact LBL About This Technology

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Low-Cost Manufacturing of Fuel Cell Bipolar Plates by ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2009. Symposium, Emerging Material Forming Technologies. Presentation Title, Low-Cost ...

42

Presenting parabolic subgroups  

E-Print Network (OSTI)

Consider a relatively hyperbolic group G. We prove that if G is finitely presented, so are its parabolic subgroups. Moreover, a presentation of the parabolic subgroups can be found algorithmically from a presentation of G, a solution of its word problem, and generating sets of the parabolic subgroups. We also give an algorithm that finds parabolic subgroups in a given recursively enumerable class of groups.

Dahmani, François

2010-01-01T23:59:59.000Z

43

Circofer -- Low cost approach to DRI production  

SciTech Connect

Lurgi's Circofer Process for reducing fine ores with coal in a Circulating Fluidized Bed (CFB) is a direct approach by using a widely applied and proven reactor in commercializing a state of the art technology. The technology is in response to the demand for a direct reduction process of the future by making possible: the use of low cost ore fines and inexpensive primary energy, fine coal; production of a high grade product used as feedstock by mini mills with the additional advantage of dilution of contaminants introduced by scrap; low environmental impact; and low specific investment costs due to the closed energy circuit. With the incorporation of the latest developments in CFB technology, Circofer offers excellent heat and mass transfer conditions and, consequently, improved gas and energy utilization. High gas conversions using recycle gas have a positive influence on the process economics whereby no export gas is produced. Sticking, accretion and reoxidation problems, which have plagued all previous attempts at developing direct reduction processes using fine ore and coal as a reductant, are avoided, essentially by operating with defined amounts of excess carbon and separation of the reduction and gasifying zones.

Weber, P.; Bresser, W.; Hirsch, M. (Lurgi Metallurgie GmbH, Frankfurt (Germany))

1994-09-01T23:59:59.000Z

44

Low-Cost Illumination-Grade LEDs  

SciTech Connect

Solid State Lighting is a cost-effective, energy-conserving technology serving a rapidly expand- ing multi-billion dollar market. This program was designed to accelerate this lighting revolution by reducing the manufacturing cost of Illumination-Grade LEDs. The technical strategy was to investigate growth substrate alternatives to standard planar sapphire, select the most effective and compatible option, and demonstrate a significant increase in Lumen/$ with a marketable LED. The most obvious alternate substrate, silicon, was extensively studied in the first two years of the program. The superior thermal and mechanical properties of Si were expected to improve wavelength uniformity and hence color yield in the manufacture of high-power illumination- grade LEDs. However, improvements in efficiency and epitaxy uniformity on standard c-plane sapphire diminished the advantages of switching to Si. Furthermore, the cost of sapphire decreased significantly and the cost of processing Si devices using our thin film process was higher than expected. We concluded that GaN on Si was a viable technology but not a practical option for Philips Lumileds. Therefore in 2012 and 2013, we sought and received amendments which broadened the scope to include other substrates and extended the time of execution. Proprietary engineered substrates, off-axis (non-c-plane) sapphire, and c-plane patterned sapphire substrates (PSS) were all investigated in the final 18 months of this program. Excellent epitaxy quality was achieved on all three candidates; however we eliminated engineered substrates and non-c-plane sapphire because of their higher combined cost of substrate, device fabrication and packaging. Ultimately, by fabricating a flip-chip (FC) LED based upon c-plane PSS we attained a 42% reduction in LED manufacturing cost relative to our LUXEON Rebel product (Q1-2012). Combined with a flux gain from 85 to 102 Lm, the LUXEON Q delivered a 210% increase in Lm/$ over this time period. The technology was commercialized in our LUXEON Q product in Sept., 2013. Also, the retention of the sapphire increased the robustness of the device, enabling sales of low-cost submount-free chips to lighting manufacturers. Thus, blue LED die sales were initiated in the form of a PSS-FC in February, 2013.

Epler, John

2013-08-31T23:59:59.000Z

45

PARABOLIC GEODESICS AS PARALLEL CURVES IN PARABOLIC GEOMETRIES  

E-Print Network (OSTI)

PARABOLIC GEODESICS AS PARALLEL CURVES IN PARABOLIC GEOMETRIES MARC HERZLICH Abstract. We give a simple characterization of the parabolic geodesics introduced by Cap, Slovák and Zádník for all parabolic then show that parabolic geodesics can be characterized as the following data: a curve on the manifold

Paris-Sud XI, Université de

46

Low Cost Processing: Plasma, Microwave, Laser, Melting and Casting  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Cost Affordable Titanium IV: Low Cost Processing: Plasma, ... obtained by using microwave energy as the consolidation method of Mg-Ti alloys.

47

Research and Development of Low-cost Titanium Alloys for ...  

Science Conference Proceedings (OSTI)

Therefore, low-cost elements such as Fe, Mn, Cr, O, and N are gaining attention in titanium alloy design for biomedical applications. For biomedical applications ...

48

Low-Cost Printable Wireless Sensors for Buildings Applications  

Low-Cost Printable Wireless Sensors for Buildings Applications Note: The technology described above is an early stage opportunity. Licensing rights to this ...

49

Very Low Cost Manufacturing of Titanium Alloy Components  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium , Cost-Affordable Titanium III. Presentation Title, Very Low Cost Manufacturing ...

50

Low Cost Materials and Processing - Programmaster.org  

Science Conference Proceedings (OSTI)

Feb 15, 2010 ... Cost-Affordable Titanium III: Low Cost Materials and Processing Sponsored by: The Minerals, Metals and Materials Society, TMS Structural ...

51

Low-Cost Prosthetics within Reach with Recycled Materials  

Science Conference Proceedings (OSTI)

Apr 19, 2010 ... Prohibitive costs aside, the design of standard prosthetic arms does ... A more recent computer rendering of the team's low-cost prosthetic arm.

52

Development of Low-cost Functional Geopolymeric Materials  

Science Conference Proceedings (OSTI)

Presentation Title, Development of Low-cost Functional Geopolymeric Materials. Author(s), Mazen Alshaaer, Rushdi Yousef, Bassam El-Eswed, Hani Khoury, ...

53

New Concept of Ultra Low Cost Chemically Bonded Ceramic ...  

Science Conference Proceedings (OSTI)

Presentation Title, New Concept of Ultra Low Cost Chemically Bonded Ceramic Materials Fabricated From Traditional Fillers and Wastes. Author(s), Henry A.

54

Low Cost Exploration, Testing, And Development Of The Chena Geothermal...  

Open Energy Info (EERE)

Cost Exploration, Testing, And Development Of The Chena Geothermal Resource Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Low Cost Exploration,...

55

Improved Solar Power Plant Efficiency: Low Cost Solar Irradiance Sensor  

A University of Colorado research group led by Fernando Mancilla-David has developed a low cost irradiance sensor using a network modeled on a neural ...

56

Low Cost: Additive Manufacturing and Metal Injection molding  

Science Conference Proceedings (OSTI)

Mar 4, 2013 ... The production of low cost titanium products from synthesized titanium powders, sponge, and other particulates has the potential to enable a ...

57

Five Low Cost Methods to Improve Energy Efficiency on ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium , Energy Conservation in Metals. Presentation Title, Five Low Cost Methods to ...

58

ESS 2012 Peer Review - Low Cost and Highly Selective Composite...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Low Cost and Highly Selective Composite Membrane for Redox Flow Batteries Fei Wang, Dharmasena Peramunage, James M. Sylvia, and Monsy M. Jocob EIC Laboratories, Inc. 111 Downey...

59

Available Technologies: Low-cost, Efficient, Flexible Solar ...  

3D solar cell of nanopillars. ... Layered Nanocrystal Photovoltaic Cells, IB-2511 . Hot Electron Photovoltaics Using Low Cost Materials and Simple Cel ...

60

Manufacturing Demonstration Facility Low-Cost Carbon Fiber Available...  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-Cost Carbon Fiber Available to US Manufacturers for Market Development and Demonstration Oak Ridge National Laboratory (ORNL) is making available market development quantities...

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

High Volume Method of Making Low Cost, Lightweight Solar Materials  

ORNL 2010-G00644/jcn UT-B ID 201002380 High Volume Method of Making Low Cost, Lightweight Solar Materials Technology Summary A critical challenge for ...

62

Low Cost TiO2 Nanoparticles - Energy Innovation Portal  

Solar Photovoltaic Advanced Materials Low Cost TiO2 Nanoparticles Sandia National Laboratories. Contact SNL About This Technology Publications: Market ...

63

High Temperature Stainless Steel Alloy with Low Cost Manganese  

High Temperature Stainless Steel Alloy with Low Cost Manganese ... ••Power industry components such as boiler tubing and piping, pressure vessels, chemical

64

Design of small, low-cost, underwater fin manipulator.  

E-Print Network (OSTI)

??This thesis details the development of a small, low cost, underwater manipulator for use on the XAUV. At this time, there are no cheap underwater… (more)

Roberts, Megan Johnson

2008-01-01T23:59:59.000Z

65

IQ-Station: a low cost portable immersive environment  

Science Conference Proceedings (OSTI)

The emergence of inexpensive 3D-TVs, affordable input and rendering hardware and open-source software has created a yeasty atmosphere for the development of low-cost immersive systems. A low cost system (here dubbed an IQ-station), fashioned from commercial ...

William R. Sherman; Patrick O'Leary; Eric T. Whiting; Shane Grover; Eric A. Wernert

2010-11-01T23:59:59.000Z

66

Parabolic flows on complex manifolds  

E-Print Network (OSTI)

Chapter 2 Convergence of the parabolic complex Monge-Amp`ere65] Streets, J. , Tian, G. A parabolic flow of pluriclosedGill, M. Convergence of the parabolic complex Monge-Amp` ere

Gill, Matthew Franklin

2012-01-01T23:59:59.000Z

67

Optimal control, parabolic equations, st  

E-Print Network (OSTI)

state constraints, for parabolic systems have been studied in Casas [20], ... troduced for deriving optimality conditionsfor parabolic problems with pure or mixed.

68

Parabolic flows on complex manifolds.  

E-Print Network (OSTI)

??We prove C ? convergence for suitably normalized solutions of the parabolic complex Monge-Ampère equation on compact Hermitian manifolds. This provides a parabolic proof of… (more)

Gill, Matthew Franklin

2012-01-01T23:59:59.000Z

69

Low cost private education in India : challenges and way forward  

E-Print Network (OSTI)

The Low Cost Private School phenomenon has gained momentum and increased visibility in recent years as researchers have begun to map and record the existence of millions of private schools that cater to the education needs ...

Garg, Nupur, M.B.A. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

70

Low Cost Solar Water Heating R&D  

NLE Websites -- All DOE Office Websites (Extended Search)

Template Low Cost Solar Water Heating R&D Kate Hudon National Renewable Energy Laboratory Kate.hudon@nrel.gov 303-275-3190 April 3, 2013 2 | Building Technologies Office...

71

Low-cost exterior insulation process and structure  

DOE Patents (OSTI)

A low-cost exterior insulation process of stacking bags of insulating material against a wall and covering them with wire mesh and stucco provides a durable structure with good insulating value.

Vohra, Arun (Bethesda, MD)

1999-01-01T23:59:59.000Z

72

Low-cost exterior insulation process and structure  

DOE Patents (OSTI)

A low-cost exterior insulation process of stacking bags of insulating material against a wall and covering them with wire mesh and stucco provides a durable structure with good insulating value. 2 figs.

Vohra, A.

1999-03-02T23:59:59.000Z

73

Low Cost Aqueous Electrolyte Based Energy Storage: Materials and ...  

Science Conference Proceedings (OSTI)

Presentation Title, Low Cost Aqueous Electrolyte Based Energy Storage: Materials and ... Deployment of New High Temperature Alloys for Power Generation Systems · Designing ... Materials Metrology for a Hydrogen Distribution Infrastructure.

74

Low-cost electromagnetic tagging : design and implementation  

E-Print Network (OSTI)

Several implementations of chipless RFID (Radio Frequency Identification) tags are presented and discussed as low-cost alternatives to chip-based RFID tags and sensors. An overview of present-day near-field electromagnetic ...

Fletcher, Richard R. (Richard Ribon)

2002-01-01T23:59:59.000Z

75

Demonstrating Innovative Low-Cost Carbon Fiber for Energy and...  

NLE Websites -- All DOE Office Websites (Extended Search)

Innovative Low-Cost Carbon Fiber for Energy and National Security Applications Front-end creel for processing precursor in tow format In-line melt spinning for precursor...

76

A microelectronic design for low-cost disposable chemical sensors  

E-Print Network (OSTI)

This thesis demonstrates the novel concept and design of integrated microelectronics for a low-cost disposable chemical sensor. The critical aspects of this chemical sensor are the performance of the microelectronic chip ...

Laval, Stuart S. (Stuart Sean), 1980-

2004-01-01T23:59:59.000Z

77

Development and performance of a miniature, low cost mass spectrometer  

E-Print Network (OSTI)

A miniature, low cost mass spectrometer has been developed that is capable of unit resolution over a mass range of 10 to 50 AMU. The design of the mass spectrometer incorporates several new features that enhance the ...

Hemond, Brian D. (Brian David Thomson)

2011-01-01T23:59:59.000Z

78

Development of a low-cost underwater manipulator.  

E-Print Network (OSTI)

??This thesis describes the design, modeling, manufacture, and testing of a low cost, multiple degree-of-freedom underwater manipulator. Current underwater robotic arm technologies are often expensive… (more)

Cooney, Lauren Alise

2006-01-01T23:59:59.000Z

79

Development of a low-cost underwater manipulator  

E-Print Network (OSTI)

This thesis describes the design, modeling, manufacture, and testing of a low cost, multiple degree-of-freedom underwater manipulator. Current underwater robotic arm technologies are often expensive or limited in functionality. ...

Cooney, Lauren Alise

2006-01-01T23:59:59.000Z

80

Design of small, low-cost, underwater fin manipulator  

E-Print Network (OSTI)

This thesis details the development of a small, low cost, underwater manipulator for use on the XAUV. At this time, there are no cheap underwater servos commercially available. The design involves modifying a commercially ...

Roberts, Megan Johnson

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Development and Evaluation of Low Cost Mercury Sorbents  

Science Conference Proceedings (OSTI)

EPRI is conducting research to investigate sorbent injection for mercury removal in utility flue gas. This report describes laboratory work conducted from mid-1999 through mid-2000 to investigate the ability of low-cost sorbents to remove mercury from simulated and actual flue gas. The goal of this program is the development of effective mercury sorbents that can be produced at lower costs than existing commercial activated carbons. In this work, low-cost sorbents were prepared and then evaluated in labo...

2000-11-27T23:59:59.000Z

82

Low Cost Fabrication of Oxide Dispersion Strengthened Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Low Cost Fabrication of Oxide Dispersion Low Cost Fabrication of Oxide Dispersion Strengthened Materials Background To obtain significant increases in the efficiency of coal fired power plants, steam pressure and temperature must be increased beyond current technology to advanced ultra-supercritical (A-USC) conditions -temperatures and pressures up to 760 degrees Celsius (°C) and 35 megapascals (MPa). The upper bounds of operating pressure and temperature are limited by the properties of the current set

83

On parabolic Whittaker functions  

E-Print Network (OSTI)

We derive a Mellin-Barnes integral representation for solution to generalized (parabolic) quantum Toda lattice introduced in \\cite{GLO}, which presumably describes the $(S^1\\times U_N)$-equivariant Gromov-Witten invariants of Grassmann variety.

Sergey Oblezin

2010-11-18T23:59:59.000Z

84

On parabolic Whittaker functions  

E-Print Network (OSTI)

We derive a Mellin-Barnes integral representation for solution to generalized (parabolic) quantum Toda lattice introduced in \\cite{GLO}, which presumably describes the $(S^1\\times U_N)$-equivariant Gromov-Witten invariants of Grassmann variety.

Oblezin, Sergey

2010-01-01T23:59:59.000Z

85

Low-Cost Solutions for Dynamic Window Material  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Low-cost Solutions For Dynamic Low-cost Solutions For Dynamic Window Materials André Anders Lawrence Berkeley National Laboratory aanders@lbl.gov 510-486-6745 April 4, 2013 AZO: transparent and conducting 2 | Program Name or Ancillary Text eere.energy.gov BTO Program Peer Review Low-cost Solutions For Dynamic Window Materials André Anders Lawrence Berkeley National Laboratory aanders@lbl.gov 510-486-6745 April 4, 2013 Task 1: Reduce cost of transparent conducting oxide (TCO) for electrochromic windows, * started in FY11 * Applicable to existing technology of electrochromic window and other applications Task 2: Produce films of oxide nanocrystals relevant to dynamic windows by terminated cluster growth, * started in FY 13

86

Low-Cost Solar Water Heating Research and Development Roadmap  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-Cost Solar Water Heating Low-Cost Solar Water Heating Research and Development Roadmap K. Hudon, T. Merrigan, J. Burch and J. Maguire National Renewable Energy Laboratory Technical Report NREL/TP-5500-54793 August 2012 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 15013 Denver West Parkway Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Low-Cost Solar Water Heating Research and Development Roadmap K. Hudon, T. Merrigan, J. Burch and J. Maguire National Renewable Energy Laboratory Prepared under Task No. SHX1.1001 Technical Report NREL/TP-5500-54793 August 2012

87

Low-Cost Solutions for Dynamic Window Material  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-cost Solutions For Dynamic Low-cost Solutions For Dynamic Window Materials André Anders Lawrence Berkeley National Laboratory aanders@lbl.gov 510-486-6745 April 4, 2013 AZO: transparent and conducting 2 | Program Name or Ancillary Text eere.energy.gov BTO Program Peer Review Low-cost Solutions For Dynamic Window Materials André Anders Lawrence Berkeley National Laboratory aanders@lbl.gov 510-486-6745 April 4, 2013 Task 1: Reduce cost of transparent conducting oxide (TCO) for electrochromic windows, * started in FY11 * Applicable to existing technology of electrochromic window and other applications Task 2: Produce films of oxide nanocrystals relevant to dynamic windows by terminated cluster growth, * started in FY 13

88

Low cost performance evaluation of passive solar buildings  

DOE Green Energy (OSTI)

An approach to low-cost instrumentation and performance evaluation of passive solar heated buildings is presented. Beginning with a statement of the need for a low-cost approach, a minimum list of measured quantities necessary to compute a set of recommended performance factors is developed. Conflicts and confusion surrounding the definition of various performance factors are discussed and suggestions are made for dealing with this situation. Available instrumentation and data processing equipment is presented. The recommended system would monitor approximately ten variables and compute numerous performance factors on site at a projected system cost of less than $3,000 per installation.

Palmiter, L.S.; Hamilton, L.B.; Holtz, M.J.

1979-10-01T23:59:59.000Z

89

Properties of parabolic Sobolev and parabolic Besov spaces  

E-Print Network (OSTI)

In this paper, we characterize parabolic Besov and parabolic Sobolev spaces in ${\\bf R}^{n+1}$ and ${\\bf R}^{n+1}_T, \\,\\, T > 0$. We also, study the relation between parabolic Besov spaces in ${\\bf R}^{n}_T, \\,\\, T > 0$ and standard Besov space in $\\R$.

Chang, Tongkeun

2011-01-01T23:59:59.000Z

90

Low Cost Carbon Fiber Production Carbon Fiber Manufacturing Cost Modeling  

E-Print Network (OSTI)

Low Cost Carbon Fiber Production Carbon Fiber Manufacturing Cost Modeling Oak Ridge National been identified by carbon fiber manufacturers as a market with substantial growth potential. When manufactured with carbon fiber as opposed to traditional materials such as steel, automotive parts are able

91

Low-cost appliance state sensing for energy disaggregation  

Science Conference Proceedings (OSTI)

Reliable detection of appliance state change is a barrier to the scalability of Non Intrusive Load Monitoring (NILM) beyond a small number of sufficiently distinct and large loads. We advocate a hybrid approach where a NILM algorithm is assisted by ultra-low-cost ... Keywords: appliance state change, energy disaggregation, sensor

Tianji Wu; Mani Srivastava

2012-11-01T23:59:59.000Z

92

Development of a Low-Cost Tide Gauge  

Science Conference Proceedings (OSTI)

A low-cost tide gauge was developed and field tested to demonstrate a technology that would enable more cost-effective and greater sampling of spatially variable water levels and ocean surface waves. The gauge was designed to be adaptable to ...

Mark F. Giardina; Marshall D. Earle; John C. Cranford; Daniel A. Osiecki

2000-04-01T23:59:59.000Z

93

PARABOLIC EXHAUSTIONS AND ANALYTIC COVERINGS  

E-Print Network (OSTI)

PARABOLIC EXHAUSTIONS AND ANALYTIC COVERINGS Finnur L´arusson January 31, 1993 Abstract. Let be a parabolic exhaustion on a Stein manifold X such that is strictly plurisubharmonic at its zeros. The metric to be parabolic because its logarithm is plurisubharmonic and satisfies the so-called Monge-Amp`ere equation

Lárusson, Finnur

94

Parabolically connected subgroups  

SciTech Connect

All reductive spherical subgroups of the group SL(n) are found for which the intersections with every parabolic subgroup of SL(n) are connected. This condition guarantees that open equivariant embeddings of the corresponding homogeneous spaces into Moishezon spaces are algebraic. Bibliography: 6 titles.

Netai, Igor V [M. V. Lomonosov Moscow State University, Faculty of Mechanics and Mathematics, Moscow (Russian Federation)

2011-08-31T23:59:59.000Z

95

A compound parabolic concentrator  

SciTech Connect

A compound parabolic concentrator (CPC) for solar energy applications is presented in this work. A prototype was built and its thermal performance was determined. Operating temperatures of the order of 150 /sup 0/C with a reasonable efficiency can be attained by means of a fixed CPC.

Manrique, J.A.

1984-05-01T23:59:59.000Z

96

Parabolic submanifolds of rank two  

E-Print Network (OSTI)

The goal of this paper is to classify parametrically parabolic submanifolds in any codimension. First, we describe the ones that are ruled and show that they are the only parabolic submanifolds that admit an isometric immersion as a hypersurface. Then, we classify the nonruled ones by two different means. In fact, we provide the polar and bipolar parametrizations, each of which is associated to a parabolic surface and a function on the surface which satisfies a parabolic differential equation. To conclude, we describe the structure of the singular set of the nonruled parabolic submanifolds.

Dajczer, Marcos

2009-01-01T23:59:59.000Z

97

Parabolic k-ample bundles  

E-Print Network (OSTI)

We construct projectivization of a parabolic vector bundle and a tautological line bundle over it. It is shown that a parabolic vector bundle is ample if and only if the tautological line bundle is ample. This allows us to generalize the notion of a k-ample bundle, introduced by Sommese, to the context of parabolic bundles. A parabolic vector bundle $E_*$ is defined to be k-ample if the tautological line bundle ${\\mathcal O}_{{\\mathbb P}(E_*)}(1)$ is $k$--ample. We establish some properties of parabolic k-ample bundles.

Biswas, Indranil

2011-01-01T23:59:59.000Z

98

Low-cost flywheel demonstration program. Final report  

DOE Green Energy (OSTI)

The Applied Physics Laboratory/Department of Energy Low Cost Flywheel Demonstration Program was initiated on 1 October 1977 and was successfully concluded on 31 December 19'9. The total cost of this program was $355,190. All primary objectives were successfully achieved as follows: demonstration of a full-size, 1)kWh flywheel having an estimated cost in large-volume production of approximately $50/kWh; developmeNt of a ball-bearing system having losses comparable to the losses in a totally magnetic suspension system; successful and repeated demonstration of the low-cost flywheel in a complete flywheel energy-storage system based on the use of ordinary house voltage and frequency; and application of the experience gained in the hardware program to project the system design into a complete, full-scale, 30-kWh home-type flywheel energy-storage system.

None

1980-04-01T23:59:59.000Z

99

Handheld and low-cost digital holographic microscopy  

E-Print Network (OSTI)

This study developed handheld and low-cost digital holographic microscopy (DHM) by adopting an in-line type hologram, a webcam, a high power RGB light emitting diode (LED), and a pinhole. It cost less than 20,000 yen (approximately 250 US dollars at 80 yen/dollar), and was approximately 120 mm x 80 mm x 55 mm in size. In addition, by adjusting the recording-distance of a hologram, the lateral resolution power at the most suitable distance was 17.5 um. Furthermore, this DHM was developed for use in open source libraries, and is therefore low-cost and can be easily developed by anyone. In this research, it is the feature to cut down cost and size and to improve the lateral resolution power further rather than existing reports. This DHM will be a useful application in fieldwork, education, and so forth.

Shiraki, Atsushi; Shimobaba, Tomoyoshi; Masuda, Nobuyuki; Ito, Tomoyoshi

2012-01-01T23:59:59.000Z

100

Low-cost hydrogen sensors: Technology maturation progress  

SciTech Connect

The authors are developing a low-cost, solid-state hydrogen sensor to support the long-term goals of the Department of Energy (DOE) Hydrogen Program to encourage acceptance and commercialization of renewable energy-based technologies. Development of efficient production, storage, and utilization technologies brings with it the need to detect and pinpoint hydrogen leaks to protect people and equipment. The solid-state hydrogen sensor, developed at Oak Ridge National Laboratory (ORNL), is potentially well-suited to meet cost and performance objectives for many of these applications. Under a cooperative research and development Agreement and license agreement, they are teaming with a private company, DCH Technology, Inc., to develop the sensor for specific market applications related to the use of hydrogen as an energy vector. This report describes the current efforts to optimize materials and sensor performance to reach the goals of low-cost fabrication and suitability for relevant application areas.

Hoffheins, B.S.; Rogers, J.E.; Lauf, R.J.; Egert, C.M. [Oak Ridge National Lab., TN (United States); Haberman, D.P. [DCH Technology, Inc., Sherman Oaks, CA (United States)

1998-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

EPRI Family of Low-Cost Multifunction Switchgear Systems  

Science Conference Proceedings (OSTI)

This project is to develop a family of low-cost solid-state switchgear systems for a range of distribution applications. These devices will be designed for use in switchgear replacements and for new installations. Additional benefits will come from other functionality (besides interrupting current) to be built into the switchgear systems. The switchgear systems will be useful in current distribution system infrastructure and, as a part of ADA, in migration to the distribution system of the future. The re...

2006-12-11T23:59:59.000Z

102

Low Cost Solar Water Heating R&D  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Template Template Low Cost Solar Water Heating R&D Kate Hudon National Renewable Energy Laboratory Kate.hudon@nrel.gov 303-275-3190 April 3, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: The major market barrier for solar water heaters (SWHs) is installed cost. This project addresses this barrier by working with an industry research partner to evaluate innovative solutions that reduce the installed cost of a SWH by

103

Low cost high performance generator technology program. Addendum report  

DOE Green Energy (OSTI)

The results of a system weight, efficiency, and size analysis which was performed on the 500 W(e) low cost high performance generator (LCHPG) are presented. The analysis was performed in an attempt to improve system efficiency and specific power over those presented in June 1975, System Design Study Report TES-SNSO-3-25. Heat source volume, configuration, and safety as related to the 500 W(e) LCHPG are also discussed. (RCK)

Not Available

1975-09-01T23:59:59.000Z

104

An Automated Home Made Low Cost Vibrating Sample Magnetometer  

E-Print Network (OSTI)

The design and operation of a homemade low cost vibrating sample magnetometer is described here. The sensitivity of this instrument is better than 10-2 emu and found to be very efficient for the measurement of magnetization of most of the ferromagnetic and other magnetic materials as a function of temperature down to 77 K and magnetic field upto 800 Oe. Both M(H) and M(T) data acquisition are fully automated employing computer and Labview software

Kundu, S

2011-01-01T23:59:59.000Z

105

Session: Parabolic Troughs (Presentation)  

DOE Green Energy (OSTI)

The project description is R and D activities at NREL and Sandia aimed at lowering the delivered energy cost of parabolic trough collector systems and FOA awards to support industry in trought development. The primary objectives are: (1) support development of near-term parabolic trought technology for central station power generation; (2) support development of next-generation trought fields; and (3) support expansion of US trough industry. The major FY08 activities were: (1) improving reflector optics; (2) reducing receiver heat loss (including improved receiver coating and mitigating hydrogen accumulation); (3) measuring collector optical efficiency; (4) optimizing plant performance and reducing cost; (5) reducing plant water consumption; and (6) directly supporting industry needs, including FOA support.

Kutscher, C.

2008-04-01T23:59:59.000Z

106

Development of Low Cost Sensors for Hydrogen Safety Applications  

SciTech Connect

We are developing rugged and reliable hydrogen safety sensors that can be easily manufactured. Potential applications also require an inexpensive sensor that can be easily deployed. Automotive applications demand low cost, while personnel safety applications emphasize light-weight, battery-operated, and wearable sensors. Our current efforts involve developing and optimizing sensor materials for stability and compatibility with typical thick-film manufacturing processes. We are also tailoring the sensor design and size along with various packaging and communication schemes for optimal acceptance by end users.

Hoffheins, B.S.; Holmes, W., Jr.; Lauf, R.J.; Maxey, L.C.; Salter, C.; Walker, D.

1999-04-07T23:59:59.000Z

107

Low-cost solar collector test and evaluation. Final report  

DOE Green Energy (OSTI)

Project was to test and evaluate a highly efficient low cost solar collector and to make this technology available to the average homeowner. The basic collector design was for use in mass production, so approximately forty collector panels were made for testing and to make it simple to be hand built. The collectors performed better than expected and written and visual material was prepared to make construction easier for a first time builder. Publicity was generated to make public aware of benefits with stories by Associated Press and in publications like Popular Science.

Benjamin, C.M.

108

Parabolic John-Nirenberg spaces  

E-Print Network (OSTI)

We introduce a parabolic version of John-Nirenberg space with exponent $p$ and show that it is contained in local weak-$L^p$ spaces.

Berkovits, Lauri

2011-01-01T23:59:59.000Z

109

NETL: Mercury Emissions Control Technologies - Assessment Of Low Cost Novel  

NLE Websites -- All DOE Office Websites (Extended Search)

Assessment Of Low Cost Novel Mercury Sorbents Assessment Of Low Cost Novel Mercury Sorbents Project Summary: Apogee Scientific Inc. will assess up to a dozen carbon-based and other sorbents that are expected to remove more than 90 percent of mercury and cost 40 to 75 percent less than commercial sorbents because they feature inexpensive precursors and simple activation steps. Six to 12 sorbents will undergo fixed-bed adsorption tests with the most promising three to six being further evaluated by injecting them into a pilot-scale electrostatic precipitator and baghouse. Commercial flue gas desulfurization activated carbon will provide the baseline for comparisons. A portable pilot system will be constructed and would accommodate a slipstream ESP or baghouse at minimal cost. Tests will be conducted at Wisconsin Electric's Valley power plant in Milwaukee, WI, and Midwest Generation's Powerton Station in Pekin, IL. The project team consists of URS Radian, Austin, TX; the Electric Power Research Institute, Palo Alto, CA; the Illinois State Geological Survey, Champaign, IL; ADA Environmental Solutions, Littleton, CO; and Physical Sciences Inc., Andover, MA.

110

NETL: Mercury Emissions Control Technologies - Low-Cost Options for  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-Cost Options for Moderate Levels of Mercury Control Low-Cost Options for Moderate Levels of Mercury Control ADA- Environmental Solutions will test two new technologies for mercury control. The TOXECON II(tm) technology injects activated carbon directly into the downstream collecting fields of an electrostatic precipitator. The benefit of this technology is that the majority of the fly ash is collected in the upstream collecting fields which results in only a small portion of carbon-contaminated ash. Additionally, the TOXECON II(tm) technology requires minimal capital investment as only minor retrofits to the electrostatic precipitator are needed. The second technology is injection of novel sorbents for mercury removal on units with hot-side electrostatic precipitators (ESPs). Mercury removal from hot-side electrostatic precipitators is difficult as their high operating temperature range keeps the mercury in the vapor phase and prevents the mercury from adsorbing onto sorbents. The TOXECON II(tm) technology will be tested at Entergy's Independence Station which burns PRB coal. The novel sorbents for hot-side ESPs technology will be tested at MidAmerican's Council Bluffs Energy Center and MidAmerican's Louisa Station, both of which burn PRB coal. Additional project partners include EPRI, MidAmerican, Entergy, Alliant, ATCO Power, DTE Energy, Oglethorpe Power, Norit Americas Inc., Xcel Energy, Southern Company, Arch Coal, and EPCOR.

111

Glass for low-cost photovoltaic solar arrays  

DOE Green Energy (OSTI)

In photovoltaic systems, the encapsulant material that protects the solar cells should be highly transparent and very durable. Glass satisfies these two criteria and is considered a primary candidate for low-cost, photovoltaic encapsulation systems. In this report, various aspects of glass encapsulation are treated that are important for the designer of photovoltaic systems. Candidate glasses and available information defining the state of the art of glass encapsulation materials and processes for automated, high volume production of terrestrial photovoltaic devices and related applications are presented. The criteria for consideration of the glass encapsulation systems were based on the LSA (Low-cost Solar Array) Project goals for arrays: (a) a low degradation rate, (b) high reliability, (c) an efficiency greater than 10 percent, (d) a total array price less than $500/kW, and (e) a production capacity of 5 x 10/sup 5/ kW/yr. The glass design areas treated herein include the types of glass, sources and costs, physical properties and glass modifications, such as antireflection coatings. 78 references.

Bouquet, F.L.

1980-02-01T23:59:59.000Z

112

CALCULATING THE PARABOLIC CHERN CHARACTER OF A LOCALLY ABELIAN PARABOLIC BUNDLE  

E-Print Network (OSTI)

CALCULATING THE PARABOLIC CHERN CHARACTER OF A LOCALLY ABELIAN PARABOLIC BUNDLE CHADI HASSAN TAHER Abstract. We calculate the parabolic Chern character of a bundle with locally abelian parabolic structure for the parabolic Chern character of a locally abelian parabolic bundle on (X, D) in terms of: --the Chern character

Paris-Sud XI, Université de

113

Orthogonal parabolic reflector systems  

SciTech Connect

A structure is described comprising: a reflecting surface which has an axis and is open at least at one axial end and in an axial section generally conforms to an axial section through a surface generated by rotating a portion of a parabolic curve about an axis perpendicular to the axis of the parabola defined by the curve; and an elongated source/sink which extends at least in the direction of the axis of the reflecting surface and is at least partly enveloped by the reflecting surface.

Cheng, D.Y.

1993-08-10T23:59:59.000Z

114

Low-Cost Miniature Multifunctional Solid-State Gas Sensors  

NLE Websites -- All DOE Office Websites (Extended Search)

Richard J. Dunst Richard J. Dunst Project Manager National Energy Technology Laboratory 626 Cochrans Mill Road P.O. Box 10940 Pittsburgh, PA 15236-0940 412-386-6694 richard.dunst@netl.doe.gov Eric D. Wachsman Principal Investigator University of Florida 339 Weil Hall Gainesville, FL 32611-4025 352-846-2991 ewach@mse.ufl.edu Low-Cost Miniature MuLtifunCtionaL soLid-state Gas sensors Description Research sponsored by the U.S. Department of Energy (DOE) Office of Fossil Energy (FE) through the National Energy Technology Laboratory (NETL), and performed by the University of Florida, has resulted in successful development of solid-state sensor technology that can provide an inexpensive, rugged device that is capable of measuring the concentration of multiple pollutants in lean-burn coal

115

Low-Cost Methane Liquefaction Plant and Vehicle Refueling Station  

SciTech Connect

The Idaho National Engineering and Environmental Laboratory (INEEL) is currently negotiating a collaborative effort with Pacific Gas and Electric (PG&E) that will advance the use of liquefied natural gas (LNG) as a vehicle fuel. We plan to develop and demonstrate a small-scale methane liquefaction plant (production of 5,000 to 10,000 gallons per day) and a low-cost ($150,000) LNG refueling station to supply fuel to LNG-powered transit buses and other heavy-duty vehicles. INEEL will perform the research and development work. PG&E will deploy the new facilities commercially in two demonstration projects, one in northern California, and one in southern California.

B. Wilding; D. Bramwell

1999-01-01T23:59:59.000Z

116

Development of low cost concentrating solar collectors. Final report  

DOE Green Energy (OSTI)

A low cost concentrating collector has been developed that has the following features: (1) Material cost per 4 foot by 8 foot panel of $175 or $225 at retail prices depending on which of the two versions are used. (2) Low weight of 159 pounds per panel when liquid-filled or approximately 5 pounds per square foot to result in minor additional roof stress. (3) A concentration factor of 1.72 to reduce the necessary storage volume for winter heating and obtain adequate temperature for future air conditioning.(4) High efficiency when mounted parallel to the roof to reduce wind damage, roof stresses, and blend better with architectural features of a house.

Batzer, D.

1982-01-31T23:59:59.000Z

117

Low Cost Exploration, Testing, And Development Of The Chena Geothermal  

Open Energy Info (EERE)

Cost Exploration, Testing, And Development Of The Chena Geothermal Cost Exploration, Testing, And Development Of The Chena Geothermal Resource Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Low Cost Exploration, Testing, And Development Of The Chena Geothermal Resource Details Activities (2) Areas (1) Regions (0) Abstract: The Chena Hot Springs geothermal field was intensively explored, tested, and developed without a wireline unit between October 2005 and August 2006. Due to the remote location of the project and its small size of 0.4 MW, it was necessary to perform the work without the geothermal industry infrastructure typically utilized in the 48 contiguous states. This could largely be done because some of the wells were capable of artesian flow at below boiling temperatures. The geology, consisting of

118

SunShot Initiative: Low-Cost Heliostat Development  

NLE Websites -- All DOE Office Websites (Extended Search)

Cost Heliostat Development Cost Heliostat Development HiTek logo Photo of a machine with two round discs connected by intertwined chains. A staged-chain drive unit eliminates destructive coupling loads from severe wind conditions and greatly reduces cumulative fatigue damage. HiTek Services, under the Baseload CSP FOA, is conducting fundamental parametric analyses of the optimum heliostat size and developing a novel low-cost heliostat design. Approach There are four tasks under this award: Develop a means to determine the optimum size range of the heliostat, in terms of the applied forces and moments, manufacturing learning curve effects, O&M, and optical efficiency. The outcome of this task will be a spreadsheet analysis tool for parametrically determining heliostat costs that are appropriately allocated into categories with inputs for a specific design.

119

Low cost bare-plate solar air collector  

DOE Green Energy (OSTI)

The purpose of this project was to develop a low cost, bare-plate collector, determine its performance for a variety of climatic conditions, analyze the economics of this type of solar collector and evaluate specific applications. Two prototype collectors were designed, fabricated and installed into an instrumented test system. Tests were conducted for a period of five months. Results of the tests showed consistent operating efficiencies of 60% or greater with air preheat temperature uses up to 20/sup 0/F for one of the prototypes. The economic analyses indicated that an installed cost of between $5 and $10 per square foot would make this type of solar system economically viable. For the materials of construction and the type of fabrication and installation perceived, these costs for the bare-plate solar collector are believed to be attainable. Specific applications for preheating ventilation air for schools were evaluated and judged to be economically viable.

Maag, W.L.; Wenzler, C.J.; Rom, F.E.; VanArsdale, D.R.

1980-09-01T23:59:59.000Z

120

Adapting fair information practices to low cost RFID systems  

E-Print Network (OSTI)

Abstract. Within the coming years, low cost radio frequency identification (RFID) systems are expected to become commonplace throughout the business-to-business and business-to-consumer marketplace. Much of the work to date on these systems pertains to systems engineering and electronic product code issues. This paper discusses ways to ensure personal privacy, and presents policies and technologies that could limit abuse. Introduction to RFID “Automatic Identification ” (Auto-ID) describes a wide class of technologies used for automatically identifying objects, individuals, and locations. Typical Auto-ID systems assign a code to a product model or type. This code can then be automatically read and manipulated by an information processing system. The Universal Product Code (UPC) / European Article Number (EAN) bar code present on most consumer

Simson L. Garfinkel

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Low-Cost Solar Water Heating Research and Development Roadmap  

DOE Green Energy (OSTI)

The market environment for solar water heating technology has changed substantially with the successful introduction of heat pump water heaters (HPWHs). The addition of this energy-efficient technology to the market increases direct competition with solar water heaters (SWHs) for available energy savings. It is therefore essential to understand which segment of the market is best suited for HPWHs and focus the development of innovative, low-cost SWHs in the market segment where the largest opportunities exist. To evaluate cost and performance tradeoffs between high performance hot water heating systems, annual energy simulations were run using the program, TRNSYS, and analysis was performed to compare the energy savings associated with HPWH and SWH technologies to conventional methods of water heating.

Hudon, K.; Merrigan, T.; Burch, J.; Maguire, J.

2012-08-01T23:59:59.000Z

122

Low Cost Thin Film Building-Integrated Photovoltaic Systems  

DOE Green Energy (OSTI)

The goal of the program is to develop 'LOW COST THIN FILM BUILDING-INTEGRATED PV SYSTEMS'. Major focus was on developing low cost solution for the commercial BIPV and rooftop PV market and meet DOE LCOE goal for the commercial market segment of 9-12 cents/kWh for 2010 and 6-8 cents/kWh for 2015. We achieved the 2010 goal and were on track to achieve the 2015 goal. The program consists of five major tasks: (1) modules; (2) inverters and BOS; (3) systems engineering and integration; (4) deployment; and (5) project management and TPP collaborative activities. We successfully crossed all stage gates and surpassed all milestones. We proudly achieved world record stable efficiencies in small area cells (12.56% for 1cm2) and large area encapsulated modules (11.3% for 800 cm2) using a triple-junction amorphous silicon/nanocrystalline silicon/nanocrystalline silicon structure, confirmed by the National Renewable Energy Laboratory. We collaborated with two inverter companies, Solectria and PV Powered, and significantly reduced inverter cost. We collaborated with three universities (Syracuse University, University of Oregon, and Colorado School of Mines) and National Renewable Energy Laboratory, and improved understanding on nanocrystalline material properties and light trapping techniques. We jointly published 50 technical papers in peer-reviewed journals and International Conference Proceedings. We installed two 75kW roof-top systems, one in Florida and another in New Jersey demonstrating innovative designs. The systems performed satisfactorily meeting/exceeding estimated kWh/kW performance. The 50/50 cost shared program was a great success and received excellent comments from DOE Manager and Technical Monitor in the Final Review.

Dr. Subhendu Guha; Dr. Jeff Yang

2012-05-25T23:59:59.000Z

123

SunShot Initiative: Next-Generation Low-Cost Reflector  

NLE Websites -- All DOE Office Websites (Extended Search)

Next-Generation Low-Cost Next-Generation Low-Cost Reflector to someone by E-mail Share SunShot Initiative: Next-Generation Low-Cost Reflector on Facebook Tweet about SunShot Initiative: Next-Generation Low-Cost Reflector on Twitter Bookmark SunShot Initiative: Next-Generation Low-Cost Reflector on Google Bookmark SunShot Initiative: Next-Generation Low-Cost Reflector on Delicious Rank SunShot Initiative: Next-Generation Low-Cost Reflector on Digg Find More places to share SunShot Initiative: Next-Generation Low-Cost Reflector on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative CSP Heat Integration for Baseload Renewable Energy Deployment

124

The Development of low cost LiFePO4-based high power lithium...  

NLE Websites -- All DOE Office Websites (Extended Search)

Development of low cost LiFePO4-based high power lithium-ion batteries Title The Development of low cost LiFePO4-based high power lithium-ion batteries Publication Type Journal...

125

Measuring cycling kinematics using a low-cost, flashing LED, multi-camera approach  

E-Print Network (OSTI)

In this thesis a low cost motion capture approach is presented and applied to measure cyclists' kinematics. The motion capture system consists of low cost hardware and custom developed software. Based on still-frame, ...

Gilbertson, Matthew (Matthew W.)

2008-01-01T23:59:59.000Z

126

Radiometric compensation for a low-cost immersive projection system Julien DEHOS  

E-Print Network (OSTI)

Radiometric compensation for a low-cost immersive projection system Julien DEHOS Eric ZEGHERS Catopsys is a low-cost projection system aiming at making mixed reality (virtual, augmented or diminished the optical axis of P. the home by developing a low-cost immersive projection system. This system is composed

Paris-Sud XI, Université de

127

Development of a Low-Cost Rotary Steerable Drilling System  

DOE Green Energy (OSTI)

The project had the goal to develop and commercialize a low-cost rotary steerable system (LCRSS) capable of operating downhole at conventional pressures and temperatures to reduce operating costs by a minimum of 50% and lost-in-hole charges by at least 50% over the currently offered systems. The LCRSS system developed under this project does reduce operating costs by 55% and lost-in-hole charges by at least 50%. The developed product is not commercializable in its current form. The overall objective was to develop and commercialize a low cost rotary steerable system (LCRSS) capable of operating downhole at conventional pressures and temperatures (20,000 psi/150 C) while reducing the operating costs by 50% and the lost-in-hole charges by 50% over the currently available systems. The proposed reduction in costs were to be realized through the significant reduction in tool complexity, a corresponding increase in tool reliability as expressed in the mean-time between failure (MTBF), and a reduction in the time and costs required to service tools after each field operation. Ultimately, the LCRSS system was to be capable of drilling 7 7/8 in. to 9 5/8 in. borehole diameters. The project was divided into three Phases, of which Phases I & II were previously completed and reported on, and are part of the case file. Therefore, the previously reported information is not repeated herein. Phase III included the fabrication of two field ready prototypes that were to be subjected to a series of drilling tests at GTI Catoosa, DOE RMOTC, and at customer partnering wells, if possible, as appropriate in the timing of the field test objectives to fully exercise all elements of the LCRSS. These tests were conducted in an iterative process based on a performance/reliability improvement cycle with the goal of demonstrating the system met all aspects required for commercial viability. These tests were conducted to achieve continuous runs of 100+ hours with well trajectories that fully exercised the tool's build/turn/drop/hold target capabilities and its higher end ratings for bit weight, torque and rotary speed. The tool teardowns were rigorously analyzed at the conclusion of each field run to assess component wear rates and to fully document any detrimental behavior(s) observed.

Roney Nazarian

2012-01-31T23:59:59.000Z

128

Recovery Act: Low Cost Integrated Substrate for OLED Lighting Development  

Science Conference Proceedings (OSTI)

PPG pursued the development of an integrated substrate, including the anode, external, and internal extraction layers. The objective of PPGâ??s program was to achieve cost reductions by displacing the existing expensive borosilicate or double-side polished float glass substrates and developing alternative electrodes and scalable light extraction layer technologies through focused and short-term applied research. One of the key highlights of the project was proving the feasibility of using PPGâ??s high transmission Solarphire® float glass as a substrate to consistently achieve organic lightemitting diode (OLED) devices with good performance and high yields. Under this program, four low-cost alternatives to the Indium Tin Oxide (ITO) anode were investigated using pilot-scale magnetron sputtered vacuum deposition (MSVD) and chemical vapor deposition (CVD) technologies. The anodes were evaluated by fabricating small and large phosphorescent organic lightemitting diode (PHOLED) devices at Universal Display Corporation (UDC). The device performance and life-times comparable to commercially available ITO anodes were demonstrated. A cost-benefit analysis was performed to down-select two anodes for further low-cost process development. Additionally, PPG developed and evaluated a number of scalable and compatible internal and external extraction layer concepts such as scattering layers on the outside of the glass substrate or between the transparent anode and the glass interface. In one external extraction layer (EEL) approach, sol-gel sprayed pyrolytic coatings were deposited using lab scale equipment by hand or automated spraying of sol-gel solutions on hot glass, followed by optimizing of scattering with minimal absorption. In another EEL approach, PPG tested large-area glass texturing by scratching a glass surface with an abrasive roller and acid etching. Efficacy enhancements of 1.27x were demonstrated using white PHOLED devices for 2.0mm substrates which are at par with the standard diffuser sheets used by OLED manufacturers. For an internal extraction layer (IEL), PPG tested two concepts combining nanoparticles either in a solgel coating inserted between the anode and OLED or anode and glass interface, or incorporated into the internal surface of the glass. Efficacy enhancements of 1.31x were demonstrated using white PHOLED devices for the IEL by itself and factors of 1.73x were attained for an IEL in combination of thick acrylic block as an EEL. Recent offline measurements indicate that, with further optimization, factors over 2.0x could be achieved through an IEL alone.

Scott Benton; Abhinav Bhandari

2012-09-30T23:59:59.000Z

129

Low-Cost High-Pressure Hydrogen Generator  

DOE Green Energy (OSTI)

Electrolysis of water, particularly in conjunction with renewable energy sources, is potentially a cost-effective and environmentally friendly method of producing hydrogen at dispersed forecourt sites, such as automotive fueling stations. The primary feedstock for an electrolyzer is electricity, which could be produced by renewable sources such as wind or solar that do not produce carbon dioxide or other greenhouse gas emissions. However, state-of-the-art electrolyzer systems are not economically competitive for forecourt hydrogen production due to their high capital and operating costs, particularly the cost of the electricity used by the electrolyzer stack. In this project, Giner Electrochemical Systems, LLC (GES) developed a low cost, high efficiency proton-exchange membrane (PEM) electrolysis system for hydrogen production at moderate pressure (300 to 400 psig). The electrolyzer stack operates at differential pressure, with hydrogen produced at moderate pressure while oxygen is evolved at near-atmospheric pressure, reducing the cost of the water feed and oxygen handling subsystems. The project included basic research on catalysts and membranes to improve the efficiency of the electrolysis reaction as well as development of advanced materials and component fabrication methods to reduce the capital cost of the electrolyzer stack and system. The project culminated in delivery of a prototype electrolyzer module to the National Renewable Energy Laboratory for testing at the National Wind Technology Center. Electrolysis cell efficiency of 72% (based on the lower heating value of hydrogen) was demonstrated using an advanced high-strength membrane developed in this project. This membrane would enable the electrolyzer system to exceed the DOE 2012 efficiency target of 69%. GES significantly reduced the capital cost of a PEM electrolyzer stack through development of low cost components and fabrication methods, including a 60% reduction in stack parts count. Economic analysis indicates that hydrogen could be produced for $3.79 per gge at an electricity cost of $0.05/kWh by the lower-cost PEM electrolyzer developed in this project, assuming high-volume production of large-scale electrolyzer systems.

Cropley, Cecelia C.; Norman, Timothy J.

2008-04-02T23:59:59.000Z

130

A Relation Between the Parabolic . . .  

E-Print Network (OSTI)

In this paper, we consider the weight i de Rham–Gauss–Manin bundles on a smooth variety arising from a smooth projective morphism f: XU ? ? U for i ? 0. We associate to each weight i de Rham bundle, a certain parabolic bundle on S and consider their parabolic Chern characters in the rational Chow groups, for a good compactification S of U. We show the triviality of the alternating sum of these parabolic bundles in the (positive degree) rational Chow groups. This removes the hypothesis of semistable reduction in the original result of this kind due to Esnault and Viehweg.

Jaya NN Iyer; Carlos T. Simpson

2006-01-01T23:59:59.000Z

131

Parabolic subgroups of Garside groups  

E-Print Network (OSTI)

A Garside monoid is a cancellative monoid with a finite lattice generating set; a Garside group is the group of fractions of a Garside monoid. The family of Garside groups contains the Artin-Tits groups of spherical type. We generalise the well-known notion of a parabolic subgroup of an Artin-Tits group into that of a parabolic subgroup of a Garside group. We also define the more general notion of a Garside subgroup of a Garside group, which is related to the notion of LCMhomomorphisms between Artin-Tits groups. We prove that most of the properties of parabolic subgroups extend to this subgroups.

Eddy Godelle

2008-01-01T23:59:59.000Z

132

KSTABILITY AND PARABOLIC STABILITY YANN ROLLIN  

E-Print Network (OSTI)

K­STABILITY AND PARABOLIC STABILITY YANN ROLLIN Abstract. Parabolic structures with rational that the three notions of parabolic polystability, K­polystability and existence of constant sca­ lar curvature K, we study iterated blowups of ruled surfaces encoded by a parabolic structure. Our main result, stated

Paris-Sud XI, Université de

133

Low Cost Geothermal Separators BLISS Boundary Layer Inline Separator Scrubber  

DOE Green Energy (OSTI)

A new compact, low cost, and high performance separator is being developed to help reduce the installed and O and M cost of geothermal power generation. This device has been given the acronym ''BLISS'' that stands for ''Boundary Layer Inline Separator Scrubber''. The device is the first of a series of separators, and in the case of injectates, scrubbers to address the cost-reduction needs of the industry. The BLISS is a multi-positional centrifugal separator primarily designed to be simply installed between pipe supports, in a horizontal position. This lower profile reduces the height safety concern for workers, and significantly reduces the total installation cost. The vessel can demand as little as one-quarter (25%) the amount of steel traditionally required to fabricate many large vertical separators. The compact nature and high separating efficiency of this device are directly attributable to a high centrifugal force coupled with boundary layer control. The pseudo isokinetic flow design imparts a self-cleaning and scale resistant feature. This polishing separator is designed to remove moderate amounts of liquid and entrained solids.

Jung, Douglas; Wai, King

2000-05-26T23:59:59.000Z

134

A Low-Cost Natural Gas/Freshwater Aerial Pipeline  

E-Print Network (OSTI)

Offered is a new type of low-cost aerial pipeline for delivery of natural gas, an important industrial and residential fuel, and freshwater as well as other payloads over long distances. The offered pipeline dramatically decreases the construction and operation costs and the time necessary for pipeline construction. A dual-use type of freight pipeline can improve an arid rural environment landscape and provide a reliable energy supply for cities. Our aerial pipeline is a large, self-lofting flexible tube disposed at high altitude. Presently, the term "natural gas" lacks a precise technical definition, but the main components of natural gas are methane, which has a specific weight less than air. A lift force of one cubic meter of methane equals approximately 0.5 kg. The lightweight film flexible pipeline can be located in the Earth-atmosphere at high altitude and poses no threat to airplanes or the local environment. The authors also suggest using lift force of this pipeline in tandem with wing devices for che...

Bolonkin, A; Bolonkin, Alexander; Cathcart, Richard

2007-01-01T23:59:59.000Z

135

Process for Low Cost Domestic Production of LIB Cathode Materials  

DOE Green Energy (OSTI)

The objective of the research was to determine the best low cost method for the large scale production of the Nickel-Cobalt-Manganese (NCM) layered cathode materials. The research and development focused on scaling up the licensed technology from Argonne National Laboratory in BASF’s battery material pilot plant in Beachwood Ohio. Since BASF did not have experience with the large scale production of the NCM cathode materials there was a significant amount of development that was needed to support BASF’s already existing research program. During the three year period BASF was able to develop and validate production processes for the NCM 111, 523 and 424 materials as well as begin development of the High Energy NCM. BASF also used this time period to provide free cathode material samples to numerous manufactures, OEM’s and research companies in order to validate the ma-terials. The success of the project can be demonstrated by the construction of the production plant in Elyria Ohio and the successful operation of that facility. The benefit of the project to the public will begin to be apparent as soon as material from the production plant is being used in electric vehicles.

Thurston, Anthony

2012-10-31T23:59:59.000Z

136

A Low-Cost Natural Gas/Freshwater Aerial Pipeline  

E-Print Network (OSTI)

Offered is a new type of low-cost aerial pipeline for delivery of natural gas, an important industrial and residential fuel, and freshwater as well as other payloads over long distances. The offered pipeline dramatically decreases the construction and operation costs and the time necessary for pipeline construction. A dual-use type of freight pipeline can improve an arid rural environment landscape and provide a reliable energy supply for cities. Our aerial pipeline is a large, self-lofting flexible tube disposed at high altitude. Presently, the term "natural gas" lacks a precise technical definition, but the main components of natural gas are methane, which has a specific weight less than air. A lift force of one cubic meter of methane equals approximately 0.5 kg. The lightweight film flexible pipeline can be located in the Earth-atmosphere at high altitude and poses no threat to airplanes or the local environment. The authors also suggest using lift force of this pipeline in tandem with wing devices for cheap shipment of a various payloads (oil, coal and water) over long distances. The article contains a computed macroproject in northwest China for delivery of 24 billion cubic meter of gas and 23 millions tonnes of water annually.

Alexander Bolonkin; Richard Cathcart

2007-01-05T23:59:59.000Z

137

Low cost fault detection system for railcars and tracks  

E-Print Network (OSTI)

A "low cost fault detection system" that identifies wheel flats and defective tracks is explored here. This is achieved with the conjunction of sensors, microcontrollers and Radio Frequency (RF) transceivers. The objective of the proposed research is to identify faults plaguing railcars and to be able to clearly distinguish the faults of a railcar from the inherent faults in the track. The focus of the research though, is mainly to identify wheel flats and defective tracks. The thesis has been written with the premise that the results from the simulation software GENSYS are close to the real time data that would have been obtained from an actual railcar. Based on the results of GENSYS, a suitable algorithm is written that helps segregate a fault in a railcar from a defect in a track. The above code is implemented using hardware including microcontrollers, accelerometers, RF transceivers and a real time monitor. An enclosure houses the system completely, so that it is ready for application in a real environment. This also involves selection of suitable hardware so that there is a uniform source of power supply that reduces the cost and assists in building a robust system.

Vengalathur, Sriram T.

2003-08-01T23:59:59.000Z

138

Low cost solar concentrator for domestic use in developing countries  

Science Conference Proceedings (OSTI)

The model of solar concentrator described in the present paper is easy to fabricate, has a lower cost of production, is rugged and light in weight. Thin sticks cut from a bamboo are woven into a parabolic basket. At every stage of construction of the basket its shape is checked. The ruff inner surface is smoothened out by applying a paste made from wheat and fennagreak flours mixed in equal proportion with water. This paste after drying forms a smooth thin coating on the inner surface. Metallized polyster paper can be stuck on the inner surface with Fevicol (adhesive). An iron rod pierced horizontally through the basket at its focal height serves to mount the basket on a stand and also can be used to hold the cooking pot. The basket can be rotated through 120 degrees. A 0.8 m diameter basket costing about R x 64 can be used to cook suitable items for a family of five in about 100 minutes.

Pande, D.R.

1980-12-01T23:59:59.000Z

139

STUDIA MATHEMATICA 193 (3) (2009) On the parabolic-elliptic limit of the doubly parabolic  

E-Print Network (OSTI)

STUDIA MATHEMATICA 193 (3) (2009) On the parabolic-elliptic limit of the doubly parabolic Keller, of solu- tions of the parabolic-parabolic Keller­Segel system in the plane to the corresponding solutions of the parabolic-elliptic model, as a physical parameter goes to zero. Our main tools are suitable space

Pujo-Menjouet, Laurent

140

On the parabolic-elliptic limit of the doubly parabolic KellerSegel system  

E-Print Network (OSTI)

On the parabolic-elliptic limit of the doubly parabolic Keller­Segel system modelling chemotaxis convergence results, in strong topologies, for so- lutions of the parabolic-parabolic Keller­Segel system in the plane, to the corresponding solutions of the parabolic-elliptic model, as a phys- ical parameter goes

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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141

MODULI SPACES OF PARABOLIC HIGGS BUNDLES AND PARABOLIC K(D) PAIRS OVER SMOOTH CURVES: I  

E-Print Network (OSTI)

MODULI SPACES OF PARABOLIC HIGGS BUNDLES AND PARABOLIC K(D) PAIRS OVER SMOOTH CURVES: I HANS U. BODEN AND K â?? OJI YOKOGAWA Abstract. This paper concerns the moduli spaces of rank two parabolic Higgs bundles and parabolic K(D) pairs over a smooth curve. Precisely which parabolic bundles occur in stable K

Boden, Hans U.

142

THE CHERN CHARACTER OF A PARABOLIC BUNDLE, AND A PARABOLIC COROLLARY OF REZNIKOV'S THEOREM  

E-Print Network (OSTI)

THE CHERN CHARACTER OF A PARABOLIC BUNDLE, AND A PARABOLIC COROLLARY OF REZNIKOV'S THEOREM JAYA NN character of a locally abelian parabolic bundle in terms of its constituent bundles. Several features and variants of parabolic structures are discussed. Parabolic bundles arising from logarithmic connections form

Iyer, Jaya N,

143

Courant Algebroids in Parabolic Geometry  

E-Print Network (OSTI)

Let $p$ be a Lie subalgebra of a semisimple Lie algebra $g$ and $(G,P)$ be the corresponding pair of connected Lie groups. A Cartan geometry of type $(G,P)$ associates to a smooth manifold $M$ a principal $P$-bundle and a Cartan connection, and a parabolic geometry is a Cartan geometry where $P$ is parabolic. We show that if $P$ is parabolic, the adjoint tractor bundle of a Cartan geometry, which is isomorphic to the Atiyah algebroid of the principal $P$-bundle, admits the structure of a (pre-)Courant algebroid, and we identify the topological obstruction to the bracket being a Courant bracket. For semisimple $G$, the Atiyah algebroid of the principal $P$-bundle associated to the Cartan geometry of $(G,P)$ admits a pre-Courant algebroid structure if and only if $P$ is parabolic.

Stuart Armstrong; Rongmin Lu

2011-12-29T23:59:59.000Z

144

Progress in parabolic dish technology  

DOE Green Energy (OSTI)

This report describes the current status of parabolic dish technology. Its purpose is to communicate the principal outcomes of DOE's parabolic dish technology RandD efforts carried out at the Solar Energy Research Institute; Sandia National Laboratory, Albuquerque; the Jet Propulsion Laboratory; and other DOE national laboratories. It is written for those in industry, academia, and government who have a special interest in solar thermal systems that use parabolic dishes as collectors. The evolution of parabolic technology is described, and examples of projects in operation and under construction are included. Solar thermal dish technology can supply either electric or thermal energy to various applications over a broad range of system sizes and temperatures. These solar energy systems will be available by the time this country needs additional electric generation capacity -- in the mid to late 1990s -- at costs competitive with other energy sources. 9 refs., 54 figs., 6 tabs.

Stine, W.B.

1989-06-01T23:59:59.000Z

145

The Parabolic-Trigonometric Functions  

E-Print Network (OSTI)

The parabolic functions are introduced in analogy to the circular and hyperbolic cases. We discuss the relevant properties, the geometrical interpretation and touch on possible generalizations and their link with the modular elliptic functions.

G. Dattoli; M. Migliorati; M. Quattromini; P. E. Ricci

2011-02-08T23:59:59.000Z

146

A Novel Low-Cost Sodium-Zinc Chloride Battery  

Science Conference Proceedings (OSTI)

The sodium-metal halide (ZEBRA) battery has been considered as one of the most attractive energy storage systems for stationary and transportation applications. Even though Na-NiCl2 battery has been widely investigated, there is still a need to develop a more economical system to make this technology more attractive for commercialization. In the present work, a novel low-cost Na-ZnCl2 battery with a thin planar ??-Al2O3 solid electrolyte (BASE) was proposed, and its electrochemical reactions and battery performance were investigated. Compared to the Na-NiCl2 chemistry, the ZnCl2-based chemistry was more complicated, in which multiple electrochemical reactions including liquid-phase formation occurred at temperatures above 253°C. During the first stage of charge, NaCl reacted with Zn to form Na in the anode and Na2ZnCl4 in the cathode. Once all the residual NaCl was consumed, further charging led to the formation of a NaCl-ZnCl2 liquid phase. At the end of charge, the liquid phase reacted with Zn to produce solid ZnCl2. To identify the effects of liquid-phase formation on electrochemical performance, button cells were assembled and tested at 280°C and 240°C. At 280°C where the liquid phase formed during cycling, cells revealed quite stable cyclability. On the other hand, more rapid increase in polarization was observed at 240°C where only solid-state electrochemical reactions occurred. SEM analysis indicated that the stable performance at 280°C was due to the suppressed growth of Zn and NaCl particles, which were generated from the liquid phase during discharge of each cycle.

Lu, Xiaochuan; Li, Guosheng; Kim, Jin Yong; Lemmon, John P.; Sprenkle, Vincent L.; Yang, Zhenguo

2013-02-28T23:59:59.000Z

147

Low-cost exterior insulation process and structure  

DOE Patents (OSTI)

The invention relates to a low-cost process for insulating walls comprising: (a) stacking bags filled with insulating material next to the exterior surface of a wall until the wall is covered, the stack of bags thus formed having fasteners to attach to a wire mesh (e.g., straps looped between the bags and fastened to the wall); (b) stretching a wire mesh (e.g., chicken wire or stucco netting) over the stack of bags, covering the side of the bags which is not adjacent to the wall; (c) fastening the wire mesh to stationary objects; (d) attaching the wire mesh to said fasteners on said stack of bags; and (e) applying a cemetitious material (e.g., stucco) to the wire mesh and allowing it to harden. Stacking the bags against the wall is preferably preceded by laying a base on the ground at the foot of the wall using a material such as cement or crushed stone wrapped in a non-woven fabric (e.g., geosynthetic felt). It is also preferred to erect stationary corner posts at the ends of the wall to be insulated, the top ends of the posts being tied to each other and/or tied or otherwise anchored to the wall. The invention also includes the structure made by this process. The structure comprises a stack of bags of insulating material next to the exterior wall of a building, said stack of bags of insulating material being attached to said wall and having a covering of cementitious material on the side not adjacent to said wall.

Vohra, Arun

1997-12-01T23:59:59.000Z

148

NREL-Low-Cost Financing with Clean Renewable Energy Bonds Webinar | Open  

Open Energy Info (EERE)

NREL-Low-Cost Financing with Clean Renewable Energy Bonds Webinar NREL-Low-Cost Financing with Clean Renewable Energy Bonds Webinar Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Low-Cost Financing with Clean Renewable Energy Bonds Agency/Company /Organization: National Renewable Energy Laboratory Partner: United States Department of Energy Sector: Energy Topics: Finance Resource Type: Webinar, Training materials, Lessons learned/best practices Website: www.nrel.gov/applying_technologies/state_local_activities/webinar_2009 Low-Cost Financing with Clean Renewable Energy Bonds Screenshot References: Low-Cost Financing with Clean Renewable Energy Bonds[1] Logo: Low-Cost Financing with Clean Renewable Energy Bonds Sponsored by the U.S. Department of Energy Technical Assistance Project for state and local officials, this Webinar described the elements of clean

149

Low-cost motor drive embedded fault diagnosis systems  

E-Print Network (OSTI)

Electric motors are used widely in industrial manufacturing plants. Bearing faults, insulation faults, and rotor faults are the major causes of electric motor failures. Based on the line current analysis, this dissertation mainly deals with the low cost incipient fault detection of inverter-fed driven motors. Basically, low order inverter harmonics contributions to fault diagnosis, a motor drive embedded condition monitoring method, analysis of motor fault signatures in noisy line current, and a few specific applications of proposed methods are studied in detail. First, the effects of inverter harmonics on motor current fault signatures are analyzed in detail. The introduced fault signatures due to harmonics provide additional information about the motor faults and enhance the reliability of fault decisions. It is theoretically and experimentally shown that the extended fault signatures caused by the inverter harmonics are similar and comparable to those generated by the fundamental harmonic on the line current. In the next chapter, the reference frame theory is proposed as a powerful toolbox to find the exact magnitude and phase quantities of specific fault signatures in real time. The faulty motors are experimentally tested both offline, using data acquisition system, and online, employing the TMS320F2812 DSP to prove the effectiveness of the proposed tool. In addition to reference frame theory, another digital signal processor (DSP)-based phasesensitive motor fault signature detection is presented in the following chapter. This method has a powerful line current noise suppression capability while detecting the fault signatures. It is experimentally shown that the proposed method can determine the normalized magnitude and phase information of the fault signatures even in the presence of significant noise. Finally, a signal processing based fault diagnosis scheme for on-board diagnosis of rotor asymmetry at start-up and idle mode is presented. It is quite challenging to obtain these regular test conditions for long enough time during daily vehicle operations. In addition, automobile vibrations cause a non-uniform air-gap motor operation which directly affects the inductances of electric motor and results quite noisy current spectrum. The proposed method overcomes the challenges like aforementioned ones simply by testing the rotor asymmetry at zero speed.

Akin, Bilal

2007-08-01T23:59:59.000Z

150

Durable, Low-cost, Improved Fuel Cell Membranes  

Science Conference Proceedings (OSTI)

The development of low cost, durable membranes and membranes electrode assemblies (MEAs) that operate under reduced relative humidity (RH) conditions remain a critical challenge for the successful introduction of fuel cells into mass markets. It was the goal of the team lead by Arkema, Inc. to address these shortages. Thus, this project addresses the following technical barriers from the fuel cells section of the Hydrogen Fuel Cells and Infrastructure Technologies Program Multi-Year Research, Development and Demonstration Plan: (A) Durability (B) Cost Arkema’s approach consisted of using blends of polyvinylidenefluoride (PVDF) and proprietary sulfonated polyelectrolytes. In the traditional approach to polyelectrolytes for proton exchange membranes (PEM), all the required properties are “packaged” in one macromolecule. The properties of interest include proton conductivity, mechanical properties, durability, and water/gas transport. This is the case, for example, for perfluorosulfonic acid-containing (PFSA) membranes. However, the cost of these materials is high, largely due to the complexity and the number of steps involved in their synthesis. In addition, they suffer other shortcomings such as mediocre mechanical properties and insufficient durability for some applications. The strength and originality of Arkema’s approach lies in the decoupling of ion conductivity from the other requirements. Kynar® PVDF provides an exceptional combination of properties that make it ideally suited for a membrane matrix (Kynar® is a registered trademark of Arkema Inc.). It exhibits outstanding chemical resistance in highly oxidative and acidic environments. In work with a prior grant, a membrane known as M41 was developed by Arkema. M41 had many of the properties needed for a high performance PEM, but had a significant deficiency in conductivity at low RH. In the first phase of this work, the processing parameters of M41 were explored as a means to increase its proton conductivity. Optimizing the processing of M41 was found to increase its proton conductivity by almost an order of magnitude at 50% RH. Characterization of the membrane morphology with Karren More at Oak Ridge National Laboratory showed that the membrane morphology was complex. This technology platform was dubbed M43 and was used as a baseline in the majority of the work on the project. Although its performance was superior to M41, M43 still showed proton conductivity an order of magnitude lower than that of a PFSA membrane at 50% RH. The MEA performance of M43 could be increased by reducing the thickness from 1 to 0.6 mils. However, the performance of the thinner M43 still did not match that of a PFSA membrane.

Chris Roger; David Mountz; Wensheng He; Tao Zhang

2011-03-17T23:59:59.000Z

151

Low-Cost Precursors to Novel Hydrogen Storage Materials  

DOE Green Energy (OSTI)

From 2005 to 2010, The Dow Chemical Company (formerly Rohm and Haas Company) was a member of the Department of Energy Center of Excellence on Chemical Hydrogen Storage, which conducted research to identify and develop chemical hydrogen storage materials having the potential to achieve DOE performance targets established for on-board vehicular application. In collaboration with Center co-leads Los Alamos National Laboratory (LANL) and Pacific Northwest National Laboratory (PNNL), and other Center partners, Dow's efforts were directed towards defining and evaluating novel chemistries for producing chemical hydrides and processes for spent fuel regeneration. In Phase 1 of this project, emphasis was placed on sodium borohydride (NaBH{sub 4}), long considered a strong candidate for hydrogen storage because of its high hydrogen storage capacity, well characterized hydrogen release chemistry, safety, and functionality. Various chemical pathways for regenerating NaBH{sub 4} from spent sodium borate solution were investigated, with the objective of meeting the 2010/2015 DOE targets of $2-3/gal gasoline equivalent at the pump ($2-3/kg H{sub 2}) for on-board hydrogen storage systems and an overall 60% energy efficiency. With the September 2007 No-Go decision for NaBH{sub 4} as an on-board hydrogen storage medium, focus was shifted to ammonia borane (AB) for on-board hydrogen storage and delivery. However, NaBH{sub 4} is a key building block to most boron-based fuels, and the ability to produce NaBH{sub 4} in an energy-efficient, cost-effective, and environmentally sound manner is critical to the viability of AB, as well as many leading materials under consideration by the Metal Hydride Center of Excellence. Therefore, in Phase 2, research continued towards identifying and developing a single low-cost NaBH4 synthetic route for cost-efficient AB first fill, and conducting baseline cost estimates for first fill and regenerated AB using a variety of synthetic routes. This project utilized an engineering-guided R&D approach, which involved the rapid down-selection of a large number of options (chemical pathways to NaBH{sub 4}) to a smaller, more manageable number. The research began by conducting an extensive review of the technical and patent literature to identify all possible options. The down-selection was based on evaluation of the options against a set of metrics, and to a large extent occurred before experimentation was initiated. Given the vast amount of literature and patents that has evolved over the years, this approach helped to focus efforts and resources on the options with the highest technical and commercial probability of success. Additionally, a detailed engineering analysis methodology was developed for conducting the cost and energy-efficiency calculations. The methodology utilized a number of inputs and tools (Aspen PEA{trademark}, FCHTool, and H2A). The down-selection of chemical pathways to NaBH{sub 4} identified three options that were subsequently pursued experimentally. Metal reduction of borate was investigated in Dow's laboratories, research on electrochemical routes to NaBH{sub 4} was conducted at Pennsylvania State University, and Idaho National Laboratory researchers examined various carbothermal routes for producing NaBH{sub 4} from borate. The electrochemical and carbothermal studies did not yield sufficiently positive results. However, NaBH{sub 4} was produced in high yields and purities by an aluminum-based metal reduction pathway. Solid-solid reactive milling, slurry milling, and solution-phase approaches to metal reduction were investigated, and while both reactive milling and solution-phase routes point to fully recyclable processes, the scale-up of reactive milling processes to produce NaBH{sub 4} is expected to be difficult. Alternatively, a low-cost solution-phase approach to NaBH{sub 4} has been identified that is based on conventional process unit operations and should be amenable to scale-up. Numerous advances in AB synthesis have been made in recent years to improve AB yields and purities

Suzanne W. Linehan; Arthur A. Chin; Nathan T. Allen; Robert Butterick; Nathan T. Kendall; I. Leo Klawiter; Francis J. Lipiecki; Dean M. Millar; David C. Molzahn; Samuel J. November; Puja Jain; Sara Nadeau; Scott Mancroni

2010-12-31T23:59:59.000Z

152

Low-Cost, High-Power Laser for Analytical and Other ...  

Search PNNL. PNNL Home; About; Research; Publications; Jobs; News; Contacts; Low-Cost, High-Power Laser for Analytical and Other Applications. ...

153

ESS 2012 Peer Review - Low-Cost, High-Performance Hybrid Membranes...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DESIGN 2008 www.PosterPresentations.com Low-Cost, High-Performance Hybrid Membranes for Redox Flow Batteries Hongxing Hu, Amsen Technologies LLC DOE SBIR Project, Program...

154

ESS 2012 Peer Review - Low Cost, High-Energy Density Flywheel...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

of Boeing Management Company. Copyright 2011 Boeing. All rights reserved. | 1 Low-Cost, High-Energy Density Flywheel Storage Grid Demonstration" Mike Strasik Program...

155

Production of a Low-Cost DMD Wire Feedstock by Direct ...  

Science Conference Proceedings (OSTI)

Presentation Title, Production of a Low-Cost DMD Wire Feedstock by Direct Consolidation of Ti Sponge. Author(s), Kevin F. Dring, Martin Lefstad, Ola Jensrud.

156

A Low-Cost, High-Efficiency Periodic Flow Gas Turbine for Distributed Energy Generation  

SciTech Connect

The proposed effort served as a feasibility study for an innovative, low-cost periodic flow gas turbine capable of realizing efficiencies in the 39-48% range.

Dr. Adam London

2008-06-20T23:59:59.000Z

157

Ampulse Raises $8 Million to Develop Low-Cost Solar Cells I  

Low-Cost Solar Cells In November 2009 Ampulse ... For consumers the benefits of using this appliance will vary depending on family size and hot

158

Density Functional Theory Study of Copper Oxide as Low-cost ...  

Science Conference Proceedings (OSTI)

Density Functional Theory Study of Copper Oxide as Low-cost Photovoltaic Material · Dye-sensitized Solar Cells with Anodized Aluminum Alloy-based Counter- ...

159

A Low Cost, High Capacity Regenerable Sorbent for Pre-combustion...  

NLE Websites -- All DOE Office Websites (Extended Search)

A Low Cost, High Capacity Regenerable Sorbent for Pre-combustion CO 2 Capture Background An important component of the Department of Energy (DOE) Carbon Sequestration Program is...

160

An Alternative Low-Cost Process for Deposition of MCrAlY Bond ...  

Science Conference Proceedings (OSTI)

Presentation Title, An Alternative Low-Cost Process for Deposition of MCrAlY Bond Coats for Advanced Syngas/Hydrogen Turbine Applications. Author(s), Ying ...

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Low-Cost Hydrogen Distributed Production System Development  

DOE Green Energy (OSTI)

H{sub 2}Gen, with the support of the Department of Energy, successfully designed, built and field-tested two steam methane reformers with 578 kg/day capacity, which has now become a standard commercial product serving customers in the specialty metals and PV manufacturing businesses. We demonstrated that this reformer/PSA system, when combined with compression, storage and dispensing (CSD) equipment could produce hydrogen that is already cost-competitive with gasoline per mile driven in a conventional (non-hybrid) vehicle. We further showed that mass producing this 578 kg/day system in quantities of just 100 units would reduce hydrogen cost per mile approximately 13% below the cost of untaxed gasoline per mile used in a hybrid electric vehicle. If mass produced in quantities of 500 units, hydrogen cost per mile in a FCEV would be 20% below the cost of untaxed gasoline in an HEV in the 2015-2020 time period using EIA fuel cost projections for natural gas and untaxed gasoline, and 45% below the cost of untaxed gasoline in a conventional car. This 20% to 45% reduction in fuel cost per mile would accrue even though hydrogen from this 578 kg/day system would cost approximately $4.14/kg, well above the DOE hydrogen cost targets of $2.50/kg by 2010 and $2.00/kg by 2015. We also estimated the cost of a larger, 1,500 kg/day SMR/PSA fueling system based on engineering cost scaling factors derived from the two H{sub 2}Gen products, a commercial 115 kg/day system and the 578 kg/day system developed under this DOE contract. This proposed system could support 200 to 250 cars per day, similar to a medium gasoline station. We estimate that the cost per mile from this larger 1,500 kg/day hydrogen fueling system would be 26% to 40% below the cost per mile of untaxed gasoline in an HEV and ICV respectively, even without any mass production cost reductions. In quantities of 500 units, we are projecting per mile cost reductions between 45% (vs. HEVs) and 62% (vs ICVs), with hydrogen costing approximately $2.87/kg, still above the DOE's 2010 $2.50/kg target. We also began laboratory testing of reforming ethanol, which we showed is currently the least expensive approach to making renewable hydrogen. Extended testing of neat ethanol in micro-reactors was successful, and we also were able to reform E-85 acquired from a local fueling station for 2,700 hours, although some modifications were required to handle the 15% gasoline present in E-85. We began initial tests of a catalyst-coated wall reformer tube that showed some promise in reducing the propensity to coke with E-85. These coated-wall tests ran for 350 hours. Additional resources would be required to commercialize an ethanol reformer operating on E-85, but there is no market for such a product at this time, so this ethanol reformer project was moth-balled pending future government or industry support. The two main objectives of this project were: (1) to design, build and test a steam methane reformer and pressure swing adsorption system that, if scaled up and mass produced, could potentially meet the DOE 2015 cost and efficiency targets for on-site distributed hydrogen generation, and (2) to demonstrate the efficacy of a low-cost renewable hydrogen generation system based on reforming ethanol to hydrogen at the fueling station.

C.E. (Sandy) Thomas, Ph.D., President; Principal Investigator, and

2011-03-10T23:59:59.000Z

162

Novel Low Cost, High Reliability Wind Turbine Drivetrain  

SciTech Connect

Clipper Windpower, in collaboration with United Technologies Research Center, the National Renewable Energy Laboratory, and Hamilton Sundstrand Corporation, developed a low-cost, deflection-compliant, reliable, and serviceable chain drive speed increaser. This chain and sprocket drivetrain design offers significant breakthroughs in the areas of cost and serviceability and addresses the key challenges of current geared and direct-drive systems. The use of gearboxes has proven to be challenging; the large torques and bending loads associated with use in large multi-MW wind applications have generally limited demonstrated lifetime to 8-10 years [1]. The large cost of gearbox replacement and the required use of large, expensive cranes can result in gearbox replacement costs on the order of $1M, representing a significant impact to overall cost of energy (COE). Direct-drive machines eliminate the gearbox, thereby targeting increased reliability and reduced life-cycle cost. However, the slow rotational speeds require very large and costly generators, which also typically have an undesirable dependence on expensive rare-earth magnet materials and large structural penalties for precise air gap control. The cost of rare-earth materials has increased 20X in the last 8 years representing a key risk to ever realizing the promised cost of energy reductions from direct-drive generators. A common challenge to both geared and direct drive architectures is a limited ability to manage input shaft deflections. The proposed Clipper drivetrain is deflection-compliant, insulating later drivetrain stages and generators from off-axis loads. The system is modular, allowing for all key parts to be removed and replaced without the use of a high capacity crane. Finally, the technology modularity allows for scalability and many possible drivetrain topologies. These benefits enable reductions in drivetrain capital cost by 10.0%, levelized replacement and O&M costs by 26.7%, and overall cost of energy by 10.2%. This design was achieved by: (1) performing an extensive optimization study that deter-mined the preliminary cost for all practical chain drive topologies to ensure the most competitive configuration; (2) conducting detailed analysis of chain dynamics, contact stresses, and wear and efficiency characteristics over the chain�������¢����������������s life to ensure accurate physics-based predictions of chain performance; and (3) developing a final product design, including reliability analysis, chain replacement procedures, and bearing and sprocket analysis. Definition of this final product configuration was used to develop refined cost of energy estimates. Finally, key system risks for the chain drive were defined and a comprehensive risk reduction plan was created for execution in Phase 2.

Anthony Chobot; Debarshi Das; Tyler Mayer; Zach Markey; Tim Martinson; Hayden Reeve; Paul Attridge; Tahany El-Wardany

2012-09-13T23:59:59.000Z

163

Shenandoah parabolic dish solar collector  

DOE Green Energy (OSTI)

The objectives of the Shenandoah, Georgia, Solar Total Energy System are to design, construct, test, and operate a solar energy system to obtain experience with large-scale hardware systems for future applications. This report describes the initial design and testing activities conducted to select and develop a collector that would serve the need of such a solar total energy system. The parabolic dish was selected as the collector most likely to maximize energy collection as required by this specific site. The fabrication, testing, and installation of the parabolic dish collector incorporating improvements identified during the development testing phase are described.

Kinoshita, G.S.

1985-01-01T23:59:59.000Z

164

SunShot Initiative: Parabolic Trough  

NLE Websites -- All DOE Office Websites (Extended Search)

development (R&D) in parabolic trough systems as one of four concentrating solar power (CSP) technologies aiming to meet the goals of the SunShot Initiative. Parabolic troughs,...

165

A survey of potential low-cost concentrator concepts for use in low-temperature water detoxification  

DOE Green Energy (OSTI)

Several different concentrator concepts have been considered for use in the detoxification of chemically contaminated water. The reactions of interest are predominantly photocatalytic in nature and are driven by low concentrations (between 1 and 50 suns) of UV radiation in the 300- to 385-nm wavelength range. Optical performance characteristics of these concentrators are thus somewhat different compared to concentrators developed for industrial process heat and electrical energy production. Relaxed optical tolerances might lead to reductions in concentrator cost that, when integrated into overall field system cost, could make the solar-driven process competitive with current UV lamp technology. Aspects of the concentrator system that might realize cost reductions include the concentrating element, the support structure, the tracking and drive system, the manufacturing processes, and the installation procedures. Several ideals have been resurrected from earlier research in the Solar Thermal Program where the need for more stringent optical performance requirements led to a decline or even an end to further investigation. In light of this new application, the most promising of these ideas are presented, including a description and a discussion of the cost and performance trade-offs. In addition, the results of recent investigate research on several of these concepts will be presented. The concepts include a low-cost parabolic trough, the inflatable line-focus concentrator, and the holographic concentrator. 16 refs., 5 figs.

Wendelin, T.

1991-12-01T23:59:59.000Z

166

THE STRUCTURE OF TWO-PARABOLIC SPACE: PARABOLIC DUST AND ITERATION.  

E-Print Network (OSTI)

THE STRUCTURE OF TWO-PARABOLIC SPACE: PARABOLIC DUST AND ITERATION. JANE GILMAN Abstract. A non-elementary M¨obius group generated by two- parabolics is determined up to conjugation by one complex para] to obtain an additional struc- ture for the parameter space, which we term the two-parabolic space

Gilman, Jane

167

PARABOLIC SCHEMES FOR QUASI-LINEAR PARABOLIC AND HYPERBOLIC PDES VIA STOCHASTIC CALCULUS  

E-Print Network (OSTI)

PARABOLIC SCHEMES FOR QUASI-LINEAR PARABOLIC AND HYPERBOLIC PDES VIA STOCHASTIC CALCULUS SEBASTIEN of a unique global strong solution for the parabolic system. We show the existence of a unique local strong not use weak solution theory but recursive parabolic schemes studied via a stochastic approach

Paris-Sud XI, Université de

168

AN ABSTRACT APPROACH TO DOMAIN PERTURBATION FOR PARABOLIC EQUATIONS AND PARABOLIC  

E-Print Network (OSTI)

AN ABSTRACT APPROACH TO DOMAIN PERTURBATION FOR PARABOLIC EQUATIONS AND PARABOLIC VARIATIONAL Australia Abstract. We study the behaviour of solutions of linear non-autonomous parabolic equations subject of func- tion spaces for non-autonomous parabolic problems is equivalent to Mosco convergence of function

Sydney, University of

169

Threshold results for semilinear parabolic systems  

E-Print Network (OSTI)

A threshold result was proved in this paper for semilinear parabolic system with pure power type nonlinearities

Xie, Qiuyi Dai Haiyang He Junhui

2010-01-01T23:59:59.000Z

170

REGULARITY FOR A DOUBLY NONLINEAR PARABOLIC EQUATION  

E-Print Network (OSTI)

REGULARITY FOR A DOUBLY NONLINEAR PARABOLIC EQUATION JUHA KINNUNEN Abstract. This survey focuses on regularity results for certain degenerate doubly nonlinear parabolic equations in the case when the Lebesgue This note focuses on the regularity of nonnegative weak solutions to the doubly nonlinear parabolic equation

Kinnunen, Juha

171

Coupled Parabolic Equations for Wave Propagation  

E-Print Network (OSTI)

Coupled Parabolic Equations for Wave Propagation Kai Huang, Knut Solna and Hongkai Zhao #3; April 30, 2004 Abstract We develop an algorithm using two coupled parabolic equations for numerical simulation of wave propagation over long distances. The coupled parabolic equations are derived from a two

Zhao, Hongkai

172

The parabolic Mandelbrot set Pascale ROESCH  

E-Print Network (OSTI)

The parabolic Mandelbrot set Pascale ROESCH (joint work with C. L. PETERSEN, IMFUFA Roskilde) Institute of Mathematics of Toulouse 21 february 2011 Roesch P. (IMT) The parabolic Mandelbrot set 21 february 2011 1 / 94 #12;Consider a rational map of degree d 2 Roesch P. (IMT) The parabolic Mandelbrot

Roesch, Pascale

173

Parabolic Molecules Philipp Grohs and Gitta Kutyniok  

E-Print Network (OSTI)

Parabolic Molecules Philipp Grohs and Gitta Kutyniok June 9, 2012 Abstract Anisotropic decompositions using representation systems based on parabolic scaling such as curve- lets or shearlets have of the notion of parabolic molecules, we aim to provide a comprehensive framework which includes customarily

Kutyniok, Gitta

174

The near parabolic renormalization Inou and Shishikura  

E-Print Network (OSTI)

The near parabolic renormalization of Inou and Shishikura Arnaud Ch´eritat Institut de Math´ematiques de Toulouse Oberwolfach, April 2008 A. Ch´eritat (IMT) Near parabolic renormalization Oberwolfach, April 2008 1 / 19 #12;1 Renormalization in complex dynamics 2 The parabolic renormalization 3 Near

Chéritat, Arnaud

175

Degenerate Parabolic Stochastic Partial Differential Equations  

E-Print Network (OSTI)

Degenerate Parabolic Stochastic Partial Differential Equations Martina Hofmanov´a Abstract. We study the Cauchy problem for a scalar semilinear degenerate parabolic partial differential equation the notion of kinetic solution which is well suited for degenerate parabolic problems and supplies a good

Paris-Sud XI, Université de

176

Release Version Parabolic Dish Microphone System  

E-Print Network (OSTI)

Release Version Parabolic Dish Microphone System Prepared by: Zhixin Chen (Ph.D. Student), with the assistance of Robert C. Maher (Associate Professor) Montana State University A parabolic dish microphone is like a mirror telescope for sound. A parabolic reflector is used to collect and focus sound waves

Maher, Robert C.

177

Plane and parabolic solar panels  

E-Print Network (OSTI)

We present a plane and parabolic collector that absorbs radiant energy and transforms it in heat. Therefore we have a panel to heat water. We study how to increment this capture of solar beams onto the panel in order to increase its efficiency in heating water.

Sales, J H O

2009-01-01T23:59:59.000Z

178

Plane and parabolic solar panels  

E-Print Network (OSTI)

We present a plane and parabolic collector that absorbs radiant energy and transforms it in heat. Therefore we have a panel to heat water. We study how to increment this capture of solar beams onto the panel in order to increase its efficiency in heating water.

J. H. O. Sales; A. T. Suzuki

2009-05-14T23:59:59.000Z

179

Parabolic tapers for overmoded waveguides  

DOE Patents (OSTI)

A waveguide taper with a parabolic profile, in which the distance along the taper axis varies as the square of the tapered dimension, provides less mode conversion than equal length linear tapers and is easier to fabricate than other non-linear tapers.

Doane, J.L.

1983-11-25T23:59:59.000Z

180

NREL: TroughNet - Parabolic Trough Workshops  

NLE Websites -- All DOE Office Websites (Extended Search)

Parabolic Trough Workshops Parabolic Trough Workshops Here you'll find information about workshops and forums concerning parabolic trough technology and concentrating solar power. Also, see upcoming events on concentrating solar power. Past Workshops and Forums 2007 Parabolic Trough Technology Workshop March 8-9, 2007 Golden, CO 2007 Solar Power Tower, Dish Stirling and Linear Fresnel Technologies Workshop March 7, 2007 Golden, CO 2006 Parabolic Trough Technology Workshop February 14-16, 2006 Incline Village, NV 2004 Solar Thermal Electric International Project Development Forum July 13, 2004 Portland, OR 2003 Parabolic Trough Thermal Energy Storage Workshop February 20-21, 2003 Golden, CO 2001 Solar Energy Forum: The Power to Choose April 21-25, 2001 Washington, D.C. 2000 Parabolic Trough Technology Workshop

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Fundamental understanding and development of low-cost, high-efficiency silicon solar cells  

DOE Green Energy (OSTI)

The overall objectives of this program are (1) to develop rapid and low-cost processes for manufacturing that can improve yield, throughput, and performance of silicon photovoltaic devices, (2) to design and fabricate high-efficiency solar cells on promising low-cost materials, and (3) to improve the fundamental understanding of advanced photovoltaic devices. Several rapid and potentially low-cost technologies are described in this report that were developed and applied toward the fabrication of high-efficiency silicon solar cells.

ROHATGI,A.; NARASIMHA,S.; MOSCHER,J.; EBONG,A.; KAMRA,S.; KRYGOWSKI,T.; DOSHI,P.; RISTOW,A.; YELUNDUR,V.; RUBY,DOUGLAS S.

2000-05-01T23:59:59.000Z

182

A low-cost approach to fabrication of multinary compounds for energy-related applications  

DOE Green Energy (OSTI)

Non-vacuum electrodeposition and electroless deposition techniques with a potential to prepare large-area uniform precursor films using low-cost source materials and low-cost capital equipment are very attractive for the growth of compound materials for superconductors and photovoltaic applications. In the first part, a low-cost electrodeposition (ED) method will be discussed for fabrication of high-temperature Tl-oxide-based superconductors. In the second part, electrodeposition and electroless deposition of semiconductor Cu-In-Ga-Se thin films will be discussed.

Bhattacharya, R.N.; Deb, S.K.

2000-01-03T23:59:59.000Z

183

Parabolic concentrating collector: a tutorial  

DOE Green Energy (OSTI)

A tutorial overview of point-focusing parabolic collectors is presented. Optical and thermal characteristics of such collectors are discussed. Data representing typical achievable collector efficiencies are presented and the importance of balancing collector cost with concentrator quality is argued through the development of a figure of merit for the collector. The impact of receiver temperature on performance is assessed and the general observation made that temperatures much in excess of 1500 to 2000/sup 0/F can actually result in decreased performance. Various types of two-axis tracking collectors are described, including the standard parabolic deep dish, Cassegrainian and Fresnel, as well as two forms of fixed mirrors with articulating receivers. The present DOE program to develop these devices is briefly discussed, as are present and projected costs for these collectors. Pricing information is presented for the only known commercial design available on the open market.

Truscello, V.C.

1979-02-15T23:59:59.000Z

184

Low-Cost Manufacturable Microchannel Systems for Passive PEM Water Management  

NLE Websites -- All DOE Office Websites (Extended Search)

Manufacturable Manufacturable Microchannel Systems for Passive PEM Water Management IIPS Number 16910 Low Low - - Cost Cost Manufacturable Manufacturable Microchannel Systems for Passive Microchannel Systems for Passive PEM Water Management PEM Water Management IIPS Number 16910 IIPS Number 16910 Ward TeGrotenhuis, Susie Stenkamp, Curt Lavender Pacific Northwest National Laboratories Richland, WA HFCIT Kick Off Meeting February 2007 2 Project objective: Create a low cost and passive PEM water management system Project objective: Project objective: Create a low cost Create a low cost and passive PEM water management system and passive PEM water management system Specific Targets Addressed for 3.4.2 Automotive-Scale: 80 kWe Integrated Transportation Fuel Cell Power Systems Operating on Direct Hydrogen

185

Advanced, Low-Cost Solar Water Heating Research Project | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Advanced, Low-Cost Solar Water Heating Advanced, Low-Cost Solar Water Heating Research Project Advanced, Low-Cost Solar Water Heating Research Project The U.S. Department of Energy is currently conducting research into advanced low-cost solar water heating. This project will employ innovative techniques to adapt water heating technology to meet U.S. market requirements, including specifications, cost, and performance targets. Project Description This project seeks to identify and resolve technical, performance, and cost barriers to the development of easy-to-install and reliable solar water heating systems for all major U.S. climate regions. The project will also evaluate opportunities for breakthrough system innovations and innovations in advanced system performance ratings. Project Partners

186

A direct thin-film path towards low-cost large-area III-V ...  

A direct thin-film path towards low-cost large-area III-V ... depending on the surface energy constraints of the nucleation ... scaling all times in ...

187

Light-Weight, Low-Cost, Single-Phase, Liquid-Cooled Cold Plate (Presentation)  

SciTech Connect

This presentation, 'Light-Weight, Low-Cost, Single-Phase Liquid-Cooled Cold Plate,' directly addresses program goals of increased power density, specific power, and lower cost of power electronics components through improved thermal management.

Narumanchi, S.

2013-07-01T23:59:59.000Z

188

Low Cost High Performance Generator Technology Program. Volume 5. Heat Pipe Topical  

DOE Green Energy (OSTI)

Research progress towards the development of a heat pipe for use in the Low Cost High Performance Thermoelectric Generator Program is reported for the period May 15, 1975 through June 1975. (TFD)

Not Available

1975-07-01T23:59:59.000Z

189

Low-Cost Nano-Patterning Process Makes Millions of Holes in Silver...  

NLE Websites -- All DOE Office Websites (Extended Search)

solar cells. NREL researchers have demonstrated a simple, low-cost way to pattern nano-sized holes in thin silver films in order to trap light waves and boost the...

190

ESS 2012 Peer Review - Iron Based Flow Batteries for Low Cost...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

EnergyOffice of Electricity's Energy Storage Program. Iron Based Flow Batteries for Low Cost Grid Level Energy Storage J.S. Wainright, R. F. Savinell, P.I.s Dept. of Chemical...

191

Evaluation of a Low-Cost Salmon Production Facility, 1986 Annual Report.  

DOE Green Energy (OSTI)

This fiscal year 1986 study sponsored by the Bonneville Power Administration evaluates the presently existing, low-cost salmon production facility operated and maintained by the Clatsop Economic Development Committee's Fisheries Project.

Hill, James M.

1986-12-01T23:59:59.000Z

192

Evaluation of a Low-Cost Salmon Production Facility, 1985 Annual Report.  

DOE Green Energy (OSTI)

This fiscal year 1985 study sponsored by the Bonneville Power Administration evaluates the presently existing low-cost salmon production facility operated and maintained by the Clatsop Economic Development Committee Fisheries Project.

Hickerson, Andrew W.; Hill, James M.

1985-12-01T23:59:59.000Z

193

Low-Cost Zero-Emission Primary Magnesium Production by Solid ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Solid Oxide Membrane (SOM) Electrolysis is a new low-cost process for direct extraction of magnesium oxide to pure magnesium and oxygen gas. .... Grain Refinement of AZ91 Alloy by Addition of Ceramic Particles.

194

No- and Low-Cost Energy-Saving Tips for Multifamily Housing Common...  

NLE Websites -- All DOE Office Websites (Extended Search)

No- and Low-Cost Energy-Saving Tips for Multifamily Housing Common Areas Secondary menu About us Press room Contact Us Portfolio Manager Login Facility owners and managers Existing...

195

Evaluation of a Low-Cost Salmon Production Facility, 1984 Annual Report.  

DOE Green Energy (OSTI)

This fiscal year 1984 study sponsored by the Bonneville Power Administration evaluates the presently existing low-cost salmon production facility operated and maintained by the Clatsop Economic Development Committee's Fisheries Project.

Hickerson, Andrew W.; Hill, James M.

1984-12-01T23:59:59.000Z

196

Design and testing of components for a low cost laser cutter  

E-Print Network (OSTI)

The main goal of this thesis is to document the design and testing of various components for use in a low cost laser cutting mechanism for hobbyists and recreational designers. Different electronics were used to assess the ...

Ramos, Joshua D

2011-01-01T23:59:59.000Z

197

Low-Cost Continuous Production of Carbon Fiber-Reinforced Aluminum Composites .  

E-Print Network (OSTI)

??The research conducted in this study was concerned with the development of low-cost continuous production of carbon fiber/aluminum composites. Two coatings, alumina and zirconia, were… (more)

Durkin, Craig Raymond

2007-01-01T23:59:59.000Z

198

ORNL makes low-cost carbon fiber available to American manufacturers...  

NLE Websites -- All DOE Office Websites (Extended Search)

material for prototyping of composite applications are invited to come and talk to us." ORNL is accepting proposals from companies that want to try out the low-cost carbon fiber to...

199

ESS 2012 Peer Review - Low Cost, High Performance and Long Life...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

* High-efficiency * Uniformity EnergyPod Low Cost, High Performance and Long Life Flow Battery Electrodes TM A Breakthrough In Distributed, Grid Scale Energy Storage ARPA-E has...

200

NETL: A Low Cost, High Capacity Regenerable Sorbent for Pre-combustion...  

NLE Websites -- All DOE Office Websites (Extended Search)

A Low Cost, High Capacity Regenerable Sorbent for Pre-combustion CO2 Capture Project No.: DE-FE0000469 TDA Research (TDA) is testing and validating the technical and economic...

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Low Cost High-H2 Syngas Production for Power and Liquid Fuels  

NLE Websites -- All DOE Office Websites (Extended Search)

Low Cost High-H2 Syngas Production for Power and Liquid Fuels Gas Technology Institute (GTI) Project Number: FE0011958 Project Description Proof-of-concept of a metal-polymeric...

202

Low cost monitoring system to diagnose problematic rail bed : case study of Mud Pumping Site  

E-Print Network (OSTI)

This thesis describes the development of low cost sensors and wireless sensor network (WSN) platform aimed at characterizing problematic rail beds (subgrade). The instrumentations are installed at a busy high-speed Northeast ...

Aw, Eng Sew, 1978-

2007-01-01T23:59:59.000Z

203

Design and prototyping of a low-cost portable mechanical ventilator  

E-Print Network (OSTI)

This paper describes the design and prototyping of a low-cost portable mechanical ventilator for use in mass casualty cases and resource-poor environments. The ventilator delivers breaths by compressing a conventional ...

Powelson, Stephen K. (Stephen Kirby)

2010-01-01T23:59:59.000Z

204

Embedded Checker Architectures for Cyclic and Low-Cost Arithmetic Codes  

Science Conference Proceedings (OSTI)

Code checkers that monitor the outputs of a system can detect both permanent and transient faults. We present two novel architectures of embedded self-testing checkers for low-cost and cyclic arithmetic codes, one based on code word generators and adders, ... Keywords: built-in self-test, code checkers, code word accumulators, code word generators, cyclic arithmetic codes, embedded checkers, low-cost arithmetic codes, on-line test, totally self-checking checkers

Albrecht P. Stroele; Steffen Tarnick

2000-08-01T23:59:59.000Z

205

Nutritionally Enhanced Edible Oil and Oilseed ProcessingChapter 13 Low-Cost Oil-Processing Techniques  

Science Conference Proceedings (OSTI)

Nutritionally Enhanced Edible Oil and Oilseed Processing Chapter 13 Low-Cost Oil-Processing Techniques Processing eChapters Processing Press Downloadable pdf of Chapter 13 Low-Cost Oil-Processing Techniques from t

206

Parabolic systems and an underlying Lagrangian.  

E-Print Network (OSTI)

??In this thesis, we extend De Giorgi's interpolation method to a class of parabolic equations which are not gradient flows but possess an entropy functional… (more)

Yolcu, Türkay

2009-01-01T23:59:59.000Z

207

Parabolic Weingarten surfaces in hyperbolic space  

E-Print Network (OSTI)

A surface in hyperbolic space $\\h^3$ invariant by a group of parabolic isometries is called a parabolic surface. In this paper we investigate parabolic surfaces of $\\h^3$ that satisfy a linear Weingarten relation of the form $a\\kappa_1+b\\kappa_2=c$ or $aH+bK=c$, where $a,b,c\\in \\r$ and, as usual, $\\kappa_i$ are the principal curvatures, $H$ is the mean curvature and $K$ is de Gaussian curvature. We classify all parabolic linear Weingarten surfaces in hyperbolic space.

López, Rafael

2008-01-01T23:59:59.000Z

208

Parabolic equations without a minimum principle.  

E-Print Network (OSTI)

??In this thesis, we consider several parabolic equations for which the minimum principle fails. We first consider a two-point boundary value problem for a one… (more)

Pang, Huadong

2007-01-01T23:59:59.000Z

209

Performance of a parabolic trough solar collector.  

E-Print Network (OSTI)

??Parabolic trough solar collectors (PTSCs) constitute a proven source of thermal energy for industrial process heat and power generation, although their implementation has been strongly… (more)

Brooks, Michael John

2005-01-01T23:59:59.000Z

210

Bibliography Parabolic Geometries and Weyl connections Nearly invariant calculus (Wunsch's) nearly invariant calculus for parabolic  

E-Print Network (OSTI)

Bibliography Parabolic Geometries and Weyl connections Nearly invariant calculus (W¨unsch's) nearly invariant calculus for parabolic geometries Jan Slov´ak Masaryk University, Brno, Czech Republic joint work;Bibliography Parabolic Geometries and Weyl connections Nearly invariant calculus Structure 1 Bibliography 2

Olver, Peter

211

ON CARLEMAN ESTIMATES FOR ELLIPTIC AND PARABOLIC OPERATORS. APPLICATIONS TO UNIQUE CONTINUATION AND CONTROL OF PARABOLIC  

E-Print Network (OSTI)

ON CARLEMAN ESTIMATES FOR ELLIPTIC AND PARABOLIC OPERATORS. APPLICATIONS TO UNIQUE CONTINUATION AND CONTROL OF PARABOLIC EQUATIONS J´ER ^OME LE ROUSSEAU AND GILLES LEBEAU Abstract. Local and global Carleman and parabolic operators by means of semi-classical microlocal techniques. Optimality results for these estimates

Paris-Sud XI, Université de

212

THE PARABOLIC-PARABOLIC KELLER-SEGEL SYSTEM WITH CRITICAL DIFFUSION AS A GRADIENT FLOW IN Rd  

E-Print Network (OSTI)

THE PARABOLIC-PARABOLIC KELLER-SEGEL SYSTEM WITH CRITICAL DIFFUSION AS A GRADIENT FLOW IN Rd , d 3 ADRIEN BLANCHET1 AND PHILIPPE LAURENC¸OT2 Abstract. It is known that, for the parabolic-elliptic Keller for the parabolic-parabolic Keller-Segel system with critical porous-medium type diffusion in dimension Rd , d 3

Paris-Sud XI, Université de

213

Parabolic Deligne-Lusztig varieties  

E-Print Network (OSTI)

Motivated by the Brou\\'e conjecture on blocks with abelian defect groups for finite reductive groups, we study "parabolic" Deligne-Lusztig varieties and construct on those which occur in the Brou\\'e conjecture an action of a braid monoid, whose action on their $\\ell$-adic cohomology will conjecturally factor trough a cyclotomic Hecke algebra. In order to construct this action, we need to enlarge the set of varieties we consider to varieties attached to a "ribbon category"; this category is a {\\em Garside category}, which plays an important role in our proof, so we devote the first part of our paper to the necessary background on Garside categories.

Digne, François

2011-01-01T23:59:59.000Z

214

PARABOLIC COMPARISON PRINCIPLE AND QUASIMINIMIZERS IN METRIC MEASURE SPACES  

E-Print Network (OSTI)

PARABOLIC COMPARISON PRINCIPLE AND QUASIMINIMIZERS IN METRIC MEASURE SPACES JUHA KINNUNEN AND MATHIAS MASSON Abstract. We give several characterizations of parabolic (quasisuper)- minimizers prove a version of com- parison principle for super- and subminimizers on parabolic space-time cylinders

Kinnunen, Juha

215

A discrete BGK approximation for strongly degenerate parabolic problems  

E-Print Network (OSTI)

A discrete BGK approximation for strongly degenerate parabolic problems with boundary conditions F strongly degenerate hyperbolic--parabolic equations with initial boundary condition. We prove a priori -- strongly degenerate parabolic equations -- singular perturbation problems -- BGK models 1 Introduction

216

A Note on Parabolic Subgroups of a Coxeter Group  

E-Print Network (OSTI)

The aim of this note is to prove that the parabolic closure of any subset of a Coxeter group is a parabolic subgroup. To obtain that, several technical lemmas on the root system of a parabolic subgroup are established.

Dongwen Qi

2008-01-01T23:59:59.000Z

217

Low-Cost Energy Efficiency Goes Block-to-Block | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Low-Cost Energy Efficiency Goes Block-to-Block Low-Cost Energy Efficiency Goes Block-to-Block Low-Cost Energy Efficiency Goes Block-to-Block February 20, 2010 - 6:21pm Addthis An innovative pilot program in Minneapolis, Minnesota, focuses on rallying whole communities around energy efficiency, one neighborhood at a time. Through the program, area residents cash in on a home energy-efficiency upgrade that saves them roughly $130 on their annual energy bill. All they have to contribute is a little time and a small initial payment. "The most effective way to get people involved is for people to tell each other, neighbor to neighbor," says Lola Schoenrich, who signed up after reading about the program in her neighborhood newsletter. She even volunteered to go door-to-door on her block handing out registration

218

Low-Cost Energy Efficiency Goes Block-to-Block | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Low-Cost Energy Efficiency Goes Block-to-Block Low-Cost Energy Efficiency Goes Block-to-Block Low-Cost Energy Efficiency Goes Block-to-Block February 20, 2010 - 6:21pm Addthis An innovative pilot program in Minneapolis, Minnesota, focuses on rallying whole communities around energy efficiency, one neighborhood at a time. Through the program, area residents cash in on a home energy-efficiency upgrade that saves them roughly $130 on their annual energy bill. All they have to contribute is a little time and a small initial payment. "The most effective way to get people involved is for people to tell each other, neighbor to neighbor," says Lola Schoenrich, who signed up after reading about the program in her neighborhood newsletter. She even volunteered to go door-to-door on her block handing out registration

219

Mainstream Engineering Develops a Low-Cost Energy-Saving Device for A/C  

NLE Websites -- All DOE Office Websites (Extended Search)

Mainstream Engineering Develops a Low-Cost Energy-Saving Device Mainstream Engineering Develops a Low-Cost Energy-Saving Device for A/C Systems Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) SBIR/STTR Home About Funding Opportunity Announcements (FOAs) Applicant and Awardee Resources Commercialization Assistance Other Resources Awards SBIR/STTR Highlights Reporting Fraud Contact Information Small Business Innovation Research and Small Business Technology Transfer U.S. Department of Energy SC-29/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-5707 F: (301) 903-5488 E: sbir-sttr@science.doe.gov More Information » January 2013 Mainstream Engineering Develops a Low-Cost Energy-Saving Device for A/C Systems Mainstream is achieving its goal to commercialize practical and

220

NETL: IEP - Post-Combustion CO2 Emissions Control - Low Cost Sorbent for  

NLE Websites -- All DOE Office Websites (Extended Search)

Low Cost Sorbent for Capturing CO2 Emissions Generated by Existing Coal-Fired Power Plants Low Cost Sorbent for Capturing CO2 Emissions Generated by Existing Coal-Fired Power Plants Project No.: DE-NT0005497 TDA sorbent test equipment TDA sorbent test equipment. TDA Research Inc. will produce and evaluate a low-cost solid sorbent developed in prior laboratory testing. The process uses an alkalized alumina adsorbent to capture carbon dioxide (CO2) at intermediate temperature and near ambient pressure. The physical adsorbent is regenerated with low-pressure steam. Although the regeneration is primarily by concentration swing, the adsorption of steam on the sorbent during regeneration also provides approximately 8°C to 10°C of temperature swing, further enhancing the regeneration rate. The sorbent is transferred between two moving bed reactors. Cycling results in gas

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

On the Path to Low Cost Renewable Fuels, an Important Breakthrough |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

On the Path to Low Cost Renewable Fuels, an Important Breakthrough On the Path to Low Cost Renewable Fuels, an Important Breakthrough On the Path to Low Cost Renewable Fuels, an Important Breakthrough April 18, 2013 - 4:10pm Addthis NREL Scientist Bryon Donohoe looks at different views of ultra structures of pre-treated biomass materials in the Cellular Visualization room of the Biomass Surface Characterization Lab. | Photo by Dennis Schroeder, NREL. NREL Scientist Bryon Donohoe looks at different views of ultra structures of pre-treated biomass materials in the Cellular Visualization room of the Biomass Surface Characterization Lab. | Photo by Dennis Schroeder, NREL. A researcher examines a strain of the fermentation microorganism Zymomonas mobilis on a culture plate. NREL has genetically engineered and patented its own strains of Zymomonas mobilis to more effectively ferment the multiple sugars found in biomass as part of the cellulosic ethanol-to-renewable fuel conversion process. | Photo by Dennis Schroeder, NREL.

222

Improving efficiency of high-concentrator photovoltaics by cooling with  

NLE Websites -- All DOE Office Websites (Extended Search)

Improving efficiency of high-concentrator photovoltaics by cooling with Improving efficiency of high-concentrator photovoltaics by cooling with two-phase forced convection Title Improving efficiency of high-concentrator photovoltaics by cooling with two-phase forced convection Publication Type Journal Article Year of Publication 2010 Authors Ho, Tony, Samuel S. Mao, and Ralph Greif Journal International Journal of Energy Research Volume 34 Start Page 1257 Issue 14 Pagination 1257-1271 Date Published 11/2010 Keywords high-concentrator photovoltaic efficiency, two-phase flow cooling applications Abstract The potential of increasing high-concentrator photovoltaic cell efficiency by cooling with two-phase flow is analyzed. The governing energy equations were used to predict cell temperature distributions and cell efficiencies for a photovoltaic cell under 100 suns' concentration. Several design conditions were taken into consideration in the analysis, including cooling channel height, working fluid type (between water and R134a), working fluid inlet temperature, pressure, and mass flow rate. It was observed that the dominant parameter for increasing cell efficiency was the working fluid saturation temperature, which itself is affected by a number of the aforementioned design parameters. The results show R134a at low inlet pressures to be highly effective in this two-phase cooling design.

223

NREL: TroughNet - Parabolic Trough Power Plant Market, Economic...  

NLE Websites -- All DOE Office Websites (Extended Search)

Parabolic Trough Power Plant Market, Economic Assessment and Deployment Parabolic trough technology is the most commercially mature, large-scale solar power technology in the...

224

Design of a low-cost thermoacoustic electricity generator and its experimental verification  

SciTech Connect

This paper describes the design and testing of a low cost thermoacoustic generator. A travelling-wave thermoacoustic engine with a configuration of a looped-tube resonator is designed and constructed to convert heat to acoustic power. A commercially available, low-cost loudspeaker is adopted as the alternator to convert the engine's acoustic power to electricity. The whole system is designed using linear thermoacoustic theory. The optimization of different parts of the thermoacoustic generator, as well as the matching between the thermoacoustic engine and the alternator are discussed in detail. A detailed comparison between the preliminary test results and linear thermoacoustic predictions is provided.

Backhaus, Scott N [Los Alamos National Laboratory; Yu, Z [UNIV OF MANCHESTER; Jaworski, A J [UNIV OF MANCHESTER

2010-01-01T23:59:59.000Z

225

NREL: TroughNet - Parabolic Trough FAQs  

NLE Websites -- All DOE Office Websites (Extended Search)

Parabolic Trough FAQs Parabolic Trough FAQs Find answers to frequently asked questions about parabolic trough solar technology. Question topics include: Central station solar benefits Economic and environmental benefits Electricity cost Installation and operation Land use Large-scale vs. distributed power Past construction decline Photovoltaics comparison Power plant cost Power plant siting Technology potential Water use Some of the following documents are available as Adobe Acrobat PDFs. How much does a parabolic trough power plant cost? The cost of a parabolic trough power plant depends on many factors such as plant size, whether thermal energy storage is included, and whether the solar field has been enlarged to increase the annual plant capacity factor. Based on these considerations the current capital cost for large

226

QED with a parabolic mirror  

E-Print Network (OSTI)

We investigate the quantum electrodynamics of a single two-level atom located at the focus of a parabolic cavity. We first work out the modifications of the spontaneous emission induced by the presence of this boundary in the optical regime, where the dipole and the rotating-wave approximations apply. Furthermore, the single-photon state that leaves the cavity asymptotically is determined. The corresponding time-reversed single-photon quantum state is capable of exciting the atom in this extreme multimode scenario with near-unit probability. Using semiclassical methods, we derive a photon-path representation for the relevant transition amplitudes and show that it constitutes a satisfactory approximation for a wide range of wavelengths.

G. Alber; J. Z. Bernád; M. Stobi?ska; L. L. Sánchez-Soto; G. Leuchs

2013-05-11T23:59:59.000Z

227

Low-Cost Ash-Derived Construction Materials: State-of-the-Art Assessment  

Science Conference Proceedings (OSTI)

Existing technologies have been successfully applied in the manufacturing of construction materials that incorporate coal combustion byproducts. This report describes an extensive literature review on coal ash use in low-cost building materials, including information on technical and economic feasibility.

1992-04-01T23:59:59.000Z

228

Low-Cost Solar Array (LSA) Project. Project quarterly report No. 9, April--June 1978  

DOE Green Energy (OSTI)

Progress made by the Low-Cost Solar Array Project during the period April through June 1978 is described. It includes reports on silicon material processing, large-area silicon sheet development, encapsulation materials testing and development, project engineering and operations activities, and manufacturing techniques, plus the steps taken to integrate these efforts.

Not Available

1978-01-01T23:59:59.000Z

229

LOW-COST, HIGH-PERFORMANCE MATERIALS USING ILLINOIS COAL COMBUSTION BY-PRODUCTS  

E-Print Network (OSTI)

be manufactured having cement replacement with Illinois coal ashes and their blends in the range of 0 to 60LOW-COST, HIGH-PERFORMANCE MATERIALS USING ILLINOIS COAL COMBUSTION BY-PRODUCTS Investigators technology for high-volume applications of Illinois coal combustion by-products generated by using both

Wisconsin-Milwaukee, University of

230

Low-cost site-assembled solar collector designs for use with heat pumps  

DOE Green Energy (OSTI)

Four low cost solar collector designs have been produced for use in solar assisted heat pump systems. Three principles guided the design: the use of air as the heat transfer medium, the use of on-site easy-to-install construction rather than modularized prefabricated construction, and the collection of solar energy at reduced temperatures.

Andrews, J W; Wilhelm, W

1977-05-01T23:59:59.000Z

231

A low cost system for implementing FADCs in imaging atmospheric ^Cerenkov astronomy  

E-Print Network (OSTI)

A low cost system for implementing FADCs in imaging atmospheric ^Cerenkov astronomy M. D. Roberts. The success of early imaging cameras in ground based ^Cerenkov as- tronomy has led to demand for increased a ^Cerenkov imaging camera. A further bene t of this system is that it reduces the amount of data recorded

Adelaide, University of

232

ESS 2012 Peer Review - Redox Flow Battery (RFB) with Low-cost...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and 1.2 m 3 footprint ITN Energy Systems, Inc., Littleton, CO 2.5kW10kWh Redox Flow Battery (RFB) with Low-cost Electrolyte and Membrane Technologies 2.1 M, 33-month program...

233

A low-cost 3 projector display system for pain reduction and improved patient recovery times  

Science Conference Proceedings (OSTI)

Medical procedures are often associated with discomfort, pain and anxiety. Previous studies have shown that one way to reduce pain during treatment is to watch nature scenes and listen to nature sounds or escape into immersive virtual environments. This ... Keywords: head-mounted displays, immersive virtual environments, low-cost 3 projector display system, pain reduction, restorative virtual environments

Eric Fassbender; Paulo de Souza

2012-11-01T23:59:59.000Z

234

Electronic shepherd - a low-cost, low-bandwidth, wireless network system  

Science Conference Proceedings (OSTI)

This paper reports a new novel low-cost, wireless communication network system, called the "Electronic Shepherd" (ES). The system is innovative in the way that it supports flock behavior, meaning that a flock leader monitors the state of the other elements ... Keywords: GPRS, GPS, animal tracking, cost-effective communication, low-power equipment, rural computing, short-range communication, wireless network

Bjørn Thorstensen; Tore Syversen; Trond-Are Bjørnvold; Tron Walseth

2004-06-01T23:59:59.000Z

235

Testing and Analysis of Low Cost Composite Materials Under Spectrum Loading and High Cycle Fatigue Conditions  

E-Print Network (OSTI)

papers cited are available through the Sandia National Laboratories website: www.sandia.gov/Renewable_Energy/wind_energy-year experimental study of low- cost composite materials for wind turbine blades. Wind turbines are subjected to 109 in and potential interactions between failure modes. Wind turbine design codes typically assume a Miner's rule

236

Non-tracking solar concentrator with a high concentration ratio  

DOE Patents (OSTI)

A nontracking solar concentrator with a high concentration ratio is provided. The concentrator includes a plurality of energy absorbers which communicate with a main header by which absorbed heat is removed. Undesired heat flow of those absorbers not being heated by radiant energy at a particular instant is impeded, improving the efficiency of the concentrator.

Hinterberger, Henry (Batavia, IL)

1977-01-01T23:59:59.000Z

237

S-Parabolic manifolds A. Aytuna and A. Sadullaev  

E-Print Network (OSTI)

S-Parabolic manifolds A. Aytuna and A. Sadullaev Abstract. A Stein manifold is called S parabolic. If a continuous special plurisubharmonic exits then we will call the manifold S parabolic: In one dimensional case of dimension n is called S parabolic in case there exits a special plurisubharmonic function 2 PSH (X

Yanikoglu, Berrin

238

ERGODIC THEORY OF PARABOLIC HORSESHOES MARIUSZ URBANSKI AND CHRISTIAN WOLF  

E-Print Network (OSTI)

ERGODIC THEORY OF PARABOLIC HORSESHOES MARIUSZ URBA´NSKI AND CHRISTIAN WOLF Abstract. In this paper parabolic fixed point and possibly also on Ws (). We call f a parabolic horseshoe map. In order to analyze of an embedded parabolic iterated function system and to apply the developed theory of the symbolic -finite

Urbanski, Mariusz

239

ERGODIC THEORY OF PARABOLIC HORSESHOES MARIUSZ URBANSKI AND CHRISTIAN WOLF  

E-Print Network (OSTI)

ERGODIC THEORY OF PARABOLIC HORSESHOES MARIUSZ URBA´NSKI AND CHRISTIAN WOLF Abstract. In this paper parabolic fixed point and possibly also on Ws (). We call f a parabolic horseshoe map. In order to analyze the pressure function to the pressure of an embedded parabolic iterated function system and to apply

Wolf, Christian

240

PARABOLIC RAYNAUD BUNDLES INDRANIL BISWAS AND GEORG HEIN  

E-Print Network (OSTI)

PARABOLIC RAYNAUD BUNDLES INDRANIL BISWAS AND GEORG HEIN Abstract. Let X be an irreducible smooth and N 2 a fixed integer. For any pair (r, d) N Ã? 1 N Z, there exists a parabolic vector bundle Rr,d, on X, with parabolic structure over S and all parabolic weights in 1 N Z, that has the following

Hein, Georg

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Large-angle Parabolic Equation Methods James T. Kirby*  

E-Print Network (OSTI)

CHAPTER 32 Large-angle Parabolic Equation Methods James T. Kirby* Large-angle parabolic equation of the parabolic equation method (PEM) to any relevant wave propagation problem implies that a principal is to examine two methods of extending the basic parabolic equation method to include large-angle effects

Kirby, James T.

242

On a parabolic logarithmic Sobolev inequality H. Ibrahim ,,, R. Monneau  

E-Print Network (OSTI)

On a parabolic logarithmic Sobolev inequality H. Ibrahim ,,, R. Monneau December 19, 2008 Abstract a parabolic version of the Kozono-Taniuchi inequality by means of anisotropic (parabolic) BMO norm. More precisely we give an upper bound for the L norm of a function in terms of its parabolic BMO norm, up

Monneau, Régis

243

Definition: Parabolic trough | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Parabolic trough Jump to: navigation, search Dictionary.png Parabolic trough A solar energy conversion device that uses a trough covered with a highly reflective surface to focus sunlight onto a linear absorber containing a working fluid that can be used to spin a turbine for electricity generation; with a single-axis sun-tracking system, the configuration of a parabolic trough can track the sun from east to west during the day.[1][2][3] View on Wikipedia Wikipedia Definition A parabolic trough is a type of solar thermal collector that is straight in one dimension and curved as a parabola in the other two, lined with a polished metal mirror. The energy of sunlight which enters the

244

Parabolic equations without a minimum principle  

E-Print Network (OSTI)

In this thesis, we consider several parabolic equations for which the minimum principle fails. We first consider a two-point boundary value problem for a one dimensional diffusion equation. We show the uniqueness and ...

Pang, Huadong

2007-01-01T23:59:59.000Z

245

Rational Approximation for a Quasilinear Parabolic Equation  

E-Print Network (OSTI)

Approximation theorems, analogous to known results for linear elliptic equations, are obtained for solutions of the heat equation. Via the Cole-Hopf transformation, this gives rise to approximation theorems for a nonlinear parabolic equation, Burgers' equation.

P. M. Gauthier; N. Tarkhanov

2007-09-22T23:59:59.000Z

246

Parabolic cylinder functions implemented in Matlab  

E-Print Network (OSTI)

Routines for computation of Weber's parabolic cylinder functions and their derivatives are implemented in Matlab for both moderate and great values of the argument. Standard, real solutions are considered. Tables of values are included.

E. Cojocaru

2009-01-15T23:59:59.000Z

247

Parabolic Trough Solar Thermal Electric Power Plants  

DOE Green Energy (OSTI)

Although many solar technologies have been demonstrated, parabolic trough solar thermal electric power plant technology represents one of the major renewable energy success stories of the last two decades.

Not Available

2003-06-01T23:59:59.000Z

248

Low-Cost Superconducting Wire for Wind Generators: High Performance, Low Cost Superconducting Wires and Coils for High Power Wind Generators  

SciTech Connect

REACT Project: The University of Houston will develop a low-cost, high-current superconducting wire that could be used in high-power wind generators. Superconducting wire currently transports 600 times more electric current than a similarly sized copper wire, but is significantly more expensive. The University of Houston’s innovation is based on engineering nanoscale defects in the superconducting film. This could quadruple the current relative to today’s superconducting wires, supporting the same amount of current using 25% of the material. This would make wind generators lighter, more powerful and more efficient. The design could result in a several-fold reduction in wire costs and enable their commercial viability of high-power wind generators for use in offshore applications.

None

2012-01-01T23:59:59.000Z

249

NETL: News Release - Ultra-low Cost Well Monitoring Could Save Thousands of  

NLE Websites -- All DOE Office Websites (Extended Search)

January 19, 2005 January 19, 2005 Ultra-low Cost Well Monitoring Could Save Thousands of Marginal Oil Wells DOE-funded Project in California Tested Successfully TULSA, OKLA. - A new, ultra-low cost method for monitoring marginal oil wells promises to help rescue thousands of U.S. wells from an early demise. Developed with funding from the Department of Energy (DOE) and project-managed by DOE's National Energy Technology Laboratory, this novel, inexpensive, monitoring-system prototype helps improve the efficiency of rod-pumped oil wells. The ultimate payoff for such an approach could be the recovery of millions of barrels of oil otherwise permanently lost while the United States watches its oil production continue to slide. MORE INFO Marginal Expense Oil Well Wireless Surveillance MEOWS -Phase II final technical report [PDF-294KB]

250

NREL: News Feature - Super-Efficient Cells Key to Low-Cost Solar Power  

NLE Websites -- All DOE Office Websites (Extended Search)

Super-Efficient Cells Key to Low-Cost Solar Power Super-Efficient Cells Key to Low-Cost Solar Power February 16, 2011 This photo shows eight Amonix 7700 solar power generators, those in front tilted horizontally, those in the rear tilted near vertically. Each is a huge rectangle divided into hundreds of squares holding cells and lenses. Enlarge image The Amonix 7700 Concentrated Photovoltaic (CPV) Solar Power Generators are showcasing reliability and undergoing validation-of-performance measurements at the SolarTAC facility in Aurora, Colo. Credit: Dennis Schroeder In this photo, a man in an orange safety vest and hardhat is using a laptop, with large concentrated photovoltaic generators in the background. Enlarge image A technician at SolarTAC in Aurora, CO, enters some numbers into a laptop as he monitors validation of the Amonix 7700 Solar Power Generators.

251

Low Cost Open-Path Instrument for Monitoring Atmospheric Carbon Dioxide at Sequestration Sites  

NLE Websites -- All DOE Office Websites (Extended Search)

Low Cost open-path Instrument for Low Cost open-path Instrument for monItorIng atmospherIC Carbon DIoxIDe at sequestratIon sItes Background Growing concern over the effect on global climate of the buildup of greenhouse gases (GHG), particularly carbon dioxide (CO 2 ), in the atmosphere may lead to the curtailment of CO 2 emissions. One potential course of action by industry to reduce GHG emissions is the subsurface disposal of CO 2 . An important requirement of such disposal is verification that the injected gases remain in place and do not leak to the surface. Perhaps the most direct evidence of a successful sequestration project is the lack of a detectable CO 2 concentration above the background level in the air near the ground. Although measurement of CO 2 concentration can be performed, it is

252

NETL: News Release - Innovative Technology Shows Promise for Low-Cost  

NLE Websites -- All DOE Office Websites (Extended Search)

June 2, 2005 June 2, 2005 Innovative Technology Shows Promise for Low-Cost Mercury Control Patented DOE Process Licensed to Industry for Commercial Development WASHINGTON, DC - Close on the heels of the U.S. Environmental Protection Agency's March 15 release of its Clean Air Mercury Rule, the U.S. Department of Energy has issued a license to private industry to commercially develop a promising low-cost, DOE-patented mercury control technology. MORE INFO Technical Report on the Thief Process [PDF-374KB] DOE's National Energy Technology Laboratory issued the license on a technology called the Thief Process to Mobotec USA, Inc., of Walnut Creek, Calif. Mobotec, a leader in developing cost-effective combustion improvement and multi-pollutant reduction technologies for industrial and

253

Low-Cost Hydrogen-from-Ethanol: A Distributed Production System (Presentation)  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen-from- Hydrogen-from- Ethanol: A Distributed Production System Presented at the Bio-Derived Liquids to Hydrogen Distributed Reforming Working Group Meeting Laurel, Maryland Tuesday, November 6, 2007 H 2 Gen Innovations, Inc. Alexandria, Virginia www.h2gen.com 2 Topics * H 2 Gen Reformer System Innovation * Natural Gas Reformer - Key performance metrics - Summary unique H2A inputs * Ethanol Reformer - Key performance metrics - Summary unique H2A inputs * Questions from 2007 Merit Review 3 H 2 Gen Innovations' Commercial SMR * Compact, low-cost 115 kg/day natural gas reformer proven in commercial practice [13 US Patents granted] * Built-in, unique, low-cost PSA system * Unique sulfur-tolerant catalyst developed with Süd Chemie 4 DOE Program Results * Task 1- Natural Gas Reformer Scaling:

254

Building America Top Innovations Hall of Fame Profile … Low-Cost Ventilation in Production Housing  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

simple, cost-effective techniques for providing fresh air throughout the home, including exhaust-only and central fan-integrated supply ventilation. Building America has refined simple whole-house ventilation systems that cost less than $350 to install. BUILDING AMERICA TOP INNOVATIONS HALL OF FAME PROFILE INNOVATIONS CATEGORY: 1. Advanced Technologies and Practices 1.3 Assured Health, Safety, and Durability Low-Cost Ventilation in Production Housing As high-performance homes get more air-tight and better insulated, attention to good indoor air quality becomes essential. Building America has effectively guided the nation's home builders to embrace whole-house ventilation by developing low-cost options that adapt well to their production processes. When the U.S. Department of Energy's Building America research teams began

255

Low-cost flywheel demonstration program. Final report, 1 October 1977-31 December 1979  

DOE Green Energy (OSTI)

The Applied Physics Laboratory/Department of Energy Low Cost Flywheel Demonstration Program was initiated on 1 October 1977 and was successfully concluded on 31 December 1979. The total cost of this program was $355,190. All primary objectives were successfully achieved as follows: demonstration of a full-size, 1-kWh flywheel having an estimated cost in large-volume production of approximately $50/kWh; development of a ball-bearing system having losses comparable to the losses in a totally magnetic suspension system; successful and repeated demonstration of the low-cost flywheel in a complete flywheel energy-storage system based on the use of ordinary house voltage and frequency; and application of the experience gained in the hardware program to project the system design into a complete, full-scale, 30-kWh home-type flywheel energy-storage system.

Rabenhorst, D.W.; Small, T.R.; Wilkinson, W.O.

1980-04-01T23:59:59.000Z

256

Sensors-00997-2005 Low-Cost Surface Mount LED Gas Sensor  

E-Print Network (OSTI)

INTRODUCTION EDs are being used far more commonly as light sources in optical chemical sensors due to the low-cost, low-power consumption, reliability and ever increasing range of devices and wavelengths available. The increased interest in LED sources has had a major impact on low-cost component based chemical sensors, where the main goal is to achieve analytical performance without the expense of more conventional instrumentation [1-5]. Typically a photodiode is used for detection, providing good sensitivity and a significant reduction in system cost. Usually the photodiode is operated at Vbias=0V and hence itself can be considered as a lowpower sensor, however, in addition to the detector, a good quality operational amplifier and mid-to-high resolution ADC are required to complete the device. These additional components not only increase system complexity and cost, but also add to the power requirements, which is of particular importance in battery-powered s

Sensor Films Results; Roderick L. Shepherd; William S. Yerazunis; Senior Member; King Tong Lau; Dermot Diamond

2005-01-01T23:59:59.000Z

257

Materials and Modules for Low Cost, High Performance Fuel Cell Humidifiers  

NLE Websites -- All DOE Office Websites (Extended Search)

Kick-off Meeting, Kick-off Meeting, Wash. D.C - 10/01/2009 Materials and Modules for Low Cost, High Performance Fuel Cell Humidifiers Prime Contractor: W. L. Gore & Associates Elkton, MD Principal Investigator: William B. Johnson Sub-Contractor: dPoint Technologies Vancouver, BC W. L. Gore & Associates, Inc. DOE Kick-off Meeting, Wash. D.C - 10/01/2009 Ahluwalia, et. al, ibid. Mirza, Z. DOE Hydrogen Program Review, June 9-13, 2008; Washington, DC Background W. L. Gore & Associates, Inc. DOE Kick-off Meeting, Wash. D.C - 10/01/2009 Objective and Technical Barriers Addressed More efficient, low-cost humidifiers can increase fuel cell inlet humidity: Reduce system cost and size of balance of plant; Improve fuel cell performance; Improve fuel cell durability. OBJECTIVE: Demonstrate a durable, high performance water

258

VibroTactor: low-cost placement-aware technique using vibration echoes on mobile devices  

Science Conference Proceedings (OSTI)

In this paper, we present a low-cost placement-aware technique, called VibroTactor, which allows mobile devices to determine where they are placed (e.g., in a pocket, on a phone holder, on the bed, or on the desk). This is achieved by filtering and analyzing ... Keywords: context-aware, pattern recognition, placement detection, pseudo sensor, sensor repurposing, vibration echoes

Sungjae Hwang; Kwangyun Wohn

2013-03-01T23:59:59.000Z

259

EPRI Family of Multi-Functional Low-Cost Solid-State Switchgear: Requirements Definition Phase  

Science Conference Proceedings (OSTI)

This report describes the findings of the research performed to assess the requirements for a next generation solid-state breakers ("all solid-state" as well as "hybrid" designs), identify the application areas, and evaluate the economic and technical considerations for different technologies and design options for a family of low-cost solid-state switchgears. The report outlines a research roadmap for design and development of the proposed technology and identifies the key functionalities and criteria t...

2005-12-22T23:59:59.000Z

260

Novel and Low Cost Temperature Sensors for Lines, Transformers, and Cables  

Science Conference Proceedings (OSTI)

This document reports on an investigation into the performance of fiber optic sensing (e.g., in conductors, transformers, and cables) to determine change in fiber characteristics with regards to sensor-aging effects and performance accuracy with time. The project began in 2002 with a rigorous analysis of temperature sensors for both point and distributed systems across a conductor / transformer winding. Key requirements that must be met are low cost, reliable performance, and good aging characteristics (...

2002-12-16T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

NETL: A Low-Cost, High-Capacity Regenerable Sorbent for CO2 Capture From  

NLE Websites -- All DOE Office Websites (Extended Search)

A Low Cost, High Capacity Regenerable Sorbent for CO2 Capture from Existing Coal-Fired Power Plants A Low Cost, High Capacity Regenerable Sorbent for CO2 Capture from Existing Coal-Fired Power Plants Project No.: DE-FE0007580 TDA Research, Inc is developing a low cost, high capacity CO2 adsorbent and demonstrating its technical and economic viability for post-combustion CO2 capture for existing pulverized coal-fired power plants. TDA is using an advanced physical adsorbent to selectively remove CO2 from flue gas. The sorbent exhibits a much higher affinity to adsorb CO2 than N2, H2O or O2, enabling effective CO2 separation from the flue gas. The sorbent binds CO2 more strongly than common adsorbents, providing the chemical potential needed to remove the CO2, however, because CO2 does not form a true covalent bond with the surface sites, regeneration can be carried out with only a small energy input. The heat input to regenerate the sorbent is only 4.9 kcal per mol of CO2, which is much lower than that for chemical absorbents or amine based solvents.

262

Reclaiming lost capability in power plant coal conversions: an innovative, low-cost approach  

Science Conference Proceedings (OSTI)

Some of the capability lost during coal conversion can be recovered for midrange/peaking power generation through low cost, turbine cycle and economizer modifications. The additional output can be realized by shutting off adjacent high pressure feedwater heaters (as specified by turbogenerator manufacturers) and simultaneously increasing heat input to the economizer. The supplemental economizer heat input makes up for heat lost to the feedwater when extraction steam is shut off. Several options for applying this novel approach to capability recovery are described. The reclaimed capability is realized at somewhat lower efficiency but at low cost, compared to the overall cost of a coal conversion. Rather than return converted units to up to 100% oil or gas firing during periods of high system demand, the proposed method allows the continued comsumption of coal for the base-load portion of the plant's output. The development of the low NO/sub x/ Slagging Combustor will allow even the added economizer heat input to be supplied by relatively low cost coal. Following a brief review of factors affecting boiler capability in coal conversions and current approaches to coal conversion in this country and overseas, the results of a preliminary study that apply the proposed novel concept to a West Coast power plant are described.

Miliaras, E.S.; Kelleher, P.J.; Fujimura, K.S.

1983-01-01T23:59:59.000Z

263

A Compact, Low-Cost GPS Drifter for Use in the Oceanic Nearshore Zone, Lakes, and Estuaries  

Science Conference Proceedings (OSTI)

The design of small, compact, low-cost GPS drifters that utilize “off the shelf” components is described. The drifters are intended for use in confined or nearshore environments over time scales of up to several days and are a low-cost ...

D. Johnson; R. Stocker; R. Head; J. Imberger; C. Pattiaratchi

2003-12-01T23:59:59.000Z

264

VillageNet: A low-cost, IEEE 802.11-based mesh network for connecting rural areas  

Science Conference Proceedings (OSTI)

VillageNet is a new wireless mesh networking technology that provides low-cost broadband Internet access for wide regions. It targets the rural market around the world, where large populations live but paying capacities are low. VillageNet offers a low-cost, ...

Partha Dutta; Sharad Jaiswal; Rajeev Rastogi

2007-08-01T23:59:59.000Z

265

Contiguous Platinum Monolayer Oxygen Reduction Electrocatalysts on High-Stability-Low-Cost Supports  

NLE Websites -- All DOE Office Websites (Extended Search)

Contiguous Platinum Monolayer Oxygen Reduction Contiguous Platinum Monolayer Oxygen Reduction Electrocatalysts on High-Stability-Low-Cost Supports Co-PIs: Jia Wang, Miomir Vukmirovic, Kotaro Sasaki, Brookhaven National Laboratory Yang Shao-Horn Massachusetts Institute of Technology Rachel O'Malley, David Thompsett, Sarah Ball, Graham Hard Johnson Matthey Fuel Cells Radoslav Adzic Brookhaven National Laboratory DOE Projects Kickoff Meeting September 30 , 2009 2 Project Overview Project Overview 1. Objectives: Objectives: Developing high performance fuel cell electrocatalysts for the oxygen reduction reaction (ORR) comprising contiguous Pt monolayer Pt monolayer on stable, inexpensive metal or alloy nanorods, nanowires, nanobars and

266

Low Cost Production of InGaN for Next-Generation Photovoltaic Devices  

SciTech Connect

The goal of this project is to develop a low-cost and low-energy technology for production of photovoltaic devices based on InGaN materials. This project builds on the ongoing development by Structured Materials Industries (SMI), of novel thin film deposition technology for Group III-Nitride materials, which is capable of depositing Group-III nitride materials at significantly lower costs and significantly lower energy usage compared to conventional deposition techniques. During this project, SMI demonstrated deposition of GaN and InGaN films using metalorganic sources, and demonstrated compatibility of the process with standard substrate materials and hardware components.

Nick M. Sbrockey, Shangzhu Sun, Gary S. Tompa,

2012-07-09T23:59:59.000Z

267

NETL: Bench-Scale Process for Low-Cost Carbon Dioxide (CO2) Capture Using a  

NLE Websites -- All DOE Office Websites (Extended Search)

Bench-Scale Process for Low-Cost Carbon Dioxide (CO2) Capture Using a Phase-Changing Absorbent Bench-Scale Process for Low-Cost Carbon Dioxide (CO2) Capture Using a Phase-Changing Absorbent Project No.: DE-FE0013687 GE global is constructing and operating a continuous, bench-scale CO2 capture system that employs a phase-changing silicone solvent . Experimental data obtained at the laboratory scale in a previous ARPA-E funded project, including mass transfer and kinetic information, is being used to determine process scalability and perform a techno-economic assessment of the commercial scale process. The manufacturability of the solvent is being examined to obtain the material needed for bench-scale testing. Data obtained from the bench-scale system will include mass transfer parameters, kinetic parameters, heat transfer parameters, solvent stability, effects of flue gas contaminants, and recommended operating conditions. Other data such as absorption/desorption isotherms and solvent regeneration energy will be determined in laboratory testing. The solvent manufacturing cost, the bench-scale engineering data, and the laboratory property data will be used to complete the techno-economic assessment and to develop a scale-up strategy for commercialization.

268

NETL: News Release - New, Low-Cost Approach to 4-D Imaging of CO2  

NLE Websites -- All DOE Office Websites (Extended Search)

7, 2005 7, 2005 New, Low-Cost Approach to 4-D Imaging of CO2 Flood Yields Breakthrough DOE-Funded Kansas Research to Bolster Economics of Marginal EOR Projects TULSA, OK - - U.S. Department of Energy-funded research has yielded a breakthrough in high-resolution subsurface imaging with the first low-cost depiction of CO2 movement through a thin, shallow oil reservoir. The University of Kansas Center for Research project combines the time-lapse approach of 4-D seismic, which is essentially a series of three-dimensional images recorded over time, with a carefully selected application of the higher-resolution imaging of other advanced seismic technologies. The first-of-its-kind project is being implemented for a landmark CO2 flood pilot project underway in the Hall-Gurney oilfield, near Russell, Kan. That pilot-itself the first CO2 flood in Kansas-also is funded by DOE. Both projects are managed by the Office of Fossil Energy's National Energy Technology Laboratory as part of its Enhanced Oil Recovery (EOR) program.

269

NETL: IEP - Bench-Scale Silicone Process for Low-Cost CO2 Capture  

NLE Websites -- All DOE Office Websites (Extended Search)

Bench-Scale Silicone Process for Low-Cost CO2 Capture Bench-Scale Silicone Process for Low-Cost CO2 Capture Project No.: FE0007502 GE Global Research and their project partners are conducting research on the use of a novel silicone solvent to capture CO2 with a continuous bench-scale system. The project will utilize both computational and experimental methods. Previously measured experimental data from a continuous laboratory-scale CO2 capture system will be used to design this bench-scale system. Data from the bench-scale system, such as kinetics and mass transfer information, will be used to determine scale-up effects and needed design parameters to develop a scale-up strategy, update cost of electricity (COE) calculations and perform a technical and economic feasibility study. A manufacturing plan for the aminosilicone solvent and a price model will be used for optimization. The final objective of the program is to demonstrate, at the bench-scale, a process that achieves 90 percent CO2 capture efficiency with less than a 35 percent increase in the COE. Development of this scalable bench-scale process combined with a rigorous process model and thorough manufacturability analysis for the solvent, will enable a practical technology path to later development at larger scales and commercialization. The technology will eventually be retrofittable to coal-based power plants.

270

Low cost stable air electrode material for high temperature solid oxide electrolyte electrochemical cells  

DOE Patents (OSTI)

A low cost, lanthanide-substituted, dimensionally and thermally stable, gas permeable, electrically conductive, porous ceramic air electrode composition of lanthanide-substituted doped lanthanum manganite is provided which is used as the cathode in high temperature, solid oxide electrolyte fuel cells and generators. The air electrode composition of this invention has a much lower fabrication cost as a result of using a lower cost lanthanide mixture, either a natural mixture or an unfinished lanthanide concentrate obtained from a natural mixture subjected to incomplete purification, as the raw material in place of part or all of the higher cost individual lanthanum. The mixed lanthanide primarily contains a mixture of at least La, Ce, Pr, and Nd, or at least La, Ce, Pr, Nd and Sm in its lanthanide content, but can also include minor amounts of other lanthanides and trace impurities. The use of lanthanides in place of some or all of the lanthanum also increases the dimensional stability of the air electrode. This low cost air electrode can be fabricated as a cathode for use in high temperature, solid oxide fuel cells and generators. 4 figs.

Kuo, L.J.H.; Singh, P.; Ruka, R.J.; Vasilow, T.R.; Bratton, R.J.

1997-11-11T23:59:59.000Z

271

Low cost stable air electrode material for high temperature solid oxide electrolyte electrochemical cells  

DOE Patents (OSTI)

A low cost, lanthanide-substituted, dimensionally and thermally stable, gas permeable, electrically conductive, porous ceramic air electrode composition of lanthanide-substituted doped lanthanum manganite is provided which is used as the cathode in high temperature, solid oxide electrolyte fuel cells and generators. The air electrode composition of this invention has a much lower fabrication cost as a result of using a lower cost lanthanide mixture, either a natural mixture or an unfinished lanthanide concentrate obtained from a natural mixture subjected to incomplete purification, as the raw material in place of part or all of the higher cost individual lanthanum. The mixed lanthanide primarily contains a mixture of at least La, Ce, Pr, and Nd, or at least La, Ce, Pr, Nd and Sm in its lanthanide content, but can also include minor amounts of other lanthanides and trace impurities. The use of lanthanides in place of some or all of the lanthanum also increases the dimensional stability of the air electrode. This low cost air electrode can be fabricated as a cathode for use in high temperature, solid oxide fuel cells and generators.

Kuo, Lewis J. H. (Monroeville, PA); Singh, Prabhakar (Export, PA); Ruka, Roswell J. (Churchill Boro, PA); Vasilow, Theodore R. (Penn Township, PA); Bratton, Raymond J. (Delmont, PA)

1997-01-01T23:59:59.000Z

272

Effective, low-cost HVAC controls upgrade in a small bank building  

Science Conference Proceedings (OSTI)

This report summarizes the measured results from a field study of the performance of a low-cost controls retrofit in a small bank building in Knoxville, TN. The retrofit consisted of a simple upgrade of heating and cooling system controls and new operating strategies. The project was undertaken to better understand how commercial energy use measurement studies should be performed and to demonstrate the effectiveness of a low-cost controls retrofit in a small commercial building. This report describes the details of the project, including building and building system characteristics, the HVAC control changes made, energy end use patterns, and the heating and cooling energy savings achieved. An improved control strategy involving thermostat setback/setup and on/off control was devised around a single replacement programmable thermostat. The strategy allowed thermostat setback/setup control of the primary HVAC system in the building and provided on/off (time-of-day) control for the two secondary systems. The energy efficiency improvements provided a 33% reduction in heating and a 21% reduction in cooling energy consumptions. Simple payback for the retrofit, including installation cost, was under 1 year. In addition to reducing the energy needs of the building, the replacement electronic thermostat provided improved interior comfort. 9 refs., 12 figs., 3 tabs.

Sharp, T.R.; MacDonald, J.M.

1990-01-01T23:59:59.000Z

273

Production of low-cost hydrogen. Final report, September 1989--August 1993  

DOE Green Energy (OSTI)

Significant technical progress has been made over the last decade to develop efficient processes for upgrading coal resources to distillable hydrocarbons which may be used to displace petroleum-derived fuels. While several different direct coal liquefaction routes are under investigation, each of them have in common the need for large quantities of hydrogen to convert the aromatic coal matrix to liquid products in the normal distillation range, and for hydrotreating to improve liquid product quality. In fact, it has been estimated that the production, recovery, and efficient use of hydrogen accounts for over 50 percent of the capital cost of the liquefaction facility. For this reason, improved methods for producing low-cost hydrogen are essential to the operating economics of the liquefaction process. This Final Report provides an assessment of the application of the MTCI indirect gasification technology for the production of low-cost hydrogen from coal feedstocks. The MTCI gasification technology is unique in that it overcomes many of the problems and issues associated with direct and other indirectly heated coal gasification systems. Although the MTCI technology can be utilized for producing hydrogen from almost any carbonaceous feedstock (fossil, biomass and waste), this report presents the results of an experimental program sponsored by the Department of Energy, Morgantown Energy Research Center, to demonstrate the production of hydrogen from coal, mild gasification chars, and liquefaction bottoms.

Not Available

1993-06-01T23:59:59.000Z

274

Design considerations for parabolic-cylindrical solar collectors  

DOE Green Energy (OSTI)

This report presents in some detail the various significant factors which influence the design of parabolic-cylindrical solar collectors.

Treadwell, G.W.

1976-07-01T23:59:59.000Z

275

PARABOLIC SUBGROUPS OF GARSIDE GROUPS II : EDDY GODELLE  

E-Print Network (OSTI)

PARABOLIC SUBGROUPS OF GARSIDE GROUPS II : RIBBONS EDDY GODELLE Abstract. We introduce parabolic subgroupoids and provide a groupoid presentation. In order to established the latter result, we subgroups, namely the standard parabolic subgroups, which are the subgroups generated by a subset

Paris-Sud XI, Université de

276

PARABOLIC DELIGNE-LUSZTIG VARIETIES. FRANCOIS DIGNE AND JEAN MICHEL  

E-Print Network (OSTI)

PARABOLIC DELIGNE-LUSZTIG VARIETIES. FRANC¸OIS DIGNE AND JEAN MICHEL Abstract. Motivated by the Brou´e conjecture on blocks with abelian defect groups for finite reductive groups, we study "parabolic categories. 1. Introduction In this paper, we study "parabolic" Deligne-Lusztig varieties, one of the main

Paris-Sud XI, Université de

277

INITIAL BOUNDARY VALUE PROBLEMS FOR A QUASILINEAR PARABOLIC SYSTEM  

E-Print Network (OSTI)

INITIAL BOUNDARY VALUE PROBLEMS FOR A QUASILINEAR PARABOLIC SYSTEM IN THREE-PHASE CAPILLARY FLOW problems for a quasi- linear parabolic system motivated by three-phase ow in porous medium in the presence quasilinear parabolic sys- tems of the form (1.1) u t + f(u) x = (B(u)u x ) x ; 0

278

Convergence properties of the local defect correction method for parabolic  

E-Print Network (OSTI)

Convergence properties of the local defect correction method for parabolic problems R. Minero , H for parabolic problems presented in [14]. We derive a general expression for the iteration matrix of the method, domain decomposition and regridding. In [14] LDC is generalized to solve parabolic partial differential

Eindhoven, Technische Universiteit

279

Parabolic PDEs and Deterministic Games Robert V. Kohn  

E-Print Network (OSTI)

Parabolic PDEs and Deterministic Games Robert V. Kohn Courant Institute, NYU Joint work with Sylvia Serfaty ICIAM07, Zurich, July 2007 Robert V. Kohn Courant Institute, NYU Parabolic PDEs and Deterministic. Kohn Courant Institute, NYU Parabolic PDEs and Deterministic Games #12;Goals and perspective Part 1

280

Generation of parabolic pulses and applications for optical telecommunications  

E-Print Network (OSTI)

Generation of parabolic pulses and applications for optical telecommunications Christophe Finot 1.Finot@u-bourgogne.fr ABSTRACT Parabolic pulses in optical fibers have stimulated an increasing number of applications. We review amplifiers, optical pulse processing techniques 1. INTRODUCTION Parabolic pulse generation and propagation

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Di usive Kinetic Explicit Schemes for Nonlinear Degenerate Parabolic Systems  

E-Print Network (OSTI)

Di#11;usive Kinetic Explicit Schemes for Nonlinear Degenerate Parabolic Systems #3; D. Aregba parabolic systems. These schemes are based on discrete BGK models where both characteristic velocities. Evje and K.H. Karlsen [15] and of M. Espedal and K.H. Karlsen [14]. For the theory of general parabolic

282

Curvilinear parabolic approximation for surface wave transformation with wavecurrent interaction  

E-Print Network (OSTI)

Curvilinear parabolic approximation for surface wave transformation with wave­current interaction not be an appropriate method for the purpose of simplifying the curvilinear parabolic approximation of the vector form of the wave­current equation given by Kirby [Higher-order approximations in the parabolic equation method

Kirby, James T.

283

Theory of parabolic pulse generation in tapered Anton I. Latkin  

E-Print Network (OSTI)

Theory of parabolic pulse generation in tapered fiber Anton I. Latkin Institute of Automation and differences between high-power parabolic pulse generation in an active me- dium and in tapered fiber of parabolic pulse generation without an external pump and determine the limita- tions of this approach. © 2007

Turitsyn, Sergei K.

284

Parabolic surfaces in hyperbolic space with constant Gaussian curvature  

E-Print Network (OSTI)

Parabolic surfaces in hyperbolic space with constant Gaussian curvature Rafael L´opez Departamento@ugr.es Keywords: hyperbolic space, parabolic surface, Gaussian curvature MSC 2000 subject classification: 53A10, 53C45 Abstract A parabolic surface in hyperbolic space H3 is a surface invariant by a group

López, Rafael

285

On Parallel Asynchronous HighOrder Solutions of Parabolic PDEs  

E-Print Network (OSTI)

On Parallel Asynchronous High­Order Solutions of Parabolic PDEs appeared in Numerical Algorithms Parabolic PDEs. They are asynchronous in the sense that each processor is allowed to advance at its own and synchronous finite difference methods, parabolic finite difference approximations with constant coefficients

Averbuch, Amir

286

Compound parabolic concentrators for narrowband wireless infrared receivers  

E-Print Network (OSTI)

Compound parabolic concentrators for narrowband wireless infrared receivers Keang-Po Ho Joseph M and hollow compound parabolic concentrators (CPCs), for use in free-space infrared communication receivers terms: compound parabolic concentrators (CPCs); optical bandpass fil- ters; Monte Carlo ray tracing

Kahn, Joseph M.

287

Rotational and Parabolic Surfaces in PSL2(R, ) and Applications  

E-Print Network (OSTI)

Rotational and Parabolic Surfaces in PSL2(R, ) and Applications By Carlos Espinoza Pe~nafiel 1 of either rotational isometries or parabolic isometries, immersed into the homogeneous manifold PSL2(R, ). Also, we give some applications. Keywords. Constant mean curvature. Rotational surfaces. Parabolic

Paris-Sud XI, Université de

288

FINITE DIFFERENCE METHODS FOR THE WIDE-ANGLE `PARABOLIC' EQUATION  

E-Print Network (OSTI)

FINITE DIFFERENCE METHODS FOR THE WIDE-ANGLE `PARABOLIC' EQUATION GEORGIOS AKRIVIS Abstract. We consider a model initial and boundary value problem for the wide-angle `parabolic' equation Lur = icu, the wide-angle `parabolic'equation of underwater acoustics. Given R > 0, µ 0, > 0, , and q real

Akrivis, Georgios

289

Parabolic resonances and instabilities Vered Rom-Kedara)  

E-Print Network (OSTI)

Parabolic resonances and instabilities Vered Rom-Kedara) Department of Applied Mathematics 1996; accepted for publication 30 August 1996 A parabolic resonance is formed when an integrable two-degrees-of-freedom d.o.f. Hamiltonian system possessing a circle of parabolic fixed points is perturbed. It is proved

290

PARABOLIC WAVE COMPUTATIONS IN NON-ORTHOGONAL COORDINATE  

E-Print Network (OSTI)

· PARABOLIC WAVE COMPUTATIONS IN NON-ORTHOGONAL COORDINATE SYSTEMS By James T. Kirby,1 Associate Member, ASCE ABSTRACT: A recent development of a parabolic equation method for wave prop- agation developed in applying the parabolic equation method (PEM) for surface wave propagation in non

Kirby, James T.

291

Elastic approximation for a solar parabolic February 29, 2012  

E-Print Network (OSTI)

Elastic approximation for a solar parabolic trough February 29, 2012 Gang Xiao (University of Nice, France) Abstract For the production of the reective surface of a solar parabolic trough concentrator energy solutions. Introduction A parabolic trough [8] is a concentrating solar thermal energy collector

Paris-Sud XI, Université de

292

Ion Torren Semiconductor Sequencing Allows Rapid, Low Cost Sequencing of the Human Exome ( 7th Annual SFAF Meeting, 2012)  

Science Conference Proceedings (OSTI)

David Jenkins on "Ion Torrent semiconductor sequencing allows rapid, low-cost sequencing of the human exome" at the 2012 Sequencing, Finishing, Analysis in the Future Meeting held June 5-7, 2012 in Santa Fe, New Mexico.

Jenkins, David [EdgeBio

2012-06-01T23:59:59.000Z

293

Low cost manufacturing of light trapping features on multi-crystalline silicon solar cells : jet etching method and cost analysis  

E-Print Network (OSTI)

An experimental study was conducted in order to determine low cost methods to improve the light trapping ability of multi-crystalline solar cells. We focused our work on improving current wet etching methods to achieve the ...

Berrada Sounni, Amine

2010-01-01T23:59:59.000Z

294

Design, fabrication, and characterization of a low-cost flexural bearing based 3D printing tool head  

E-Print Network (OSTI)

This thesis discusses the design, characterization and optimization of a low-cost additive rapid-prototyping tool head for a technology known as Fused Filament Fabrication for use in an educational curriculum. Building a ...

Ramirez, Aaron Eduardo

2010-01-01T23:59:59.000Z

295

Low-cost carriers in Japan : challenges and paths to success - using a corporate simulation model for empirical analysis  

E-Print Network (OSTI)

This paper analyzes the causes behind the sluggishness of new airlines, low cost carriers (LCCs), in Japan. The object is to identify and to recommend innovative policy changes and ideas for the industry, by analyzing the ...

Shiotani, Sayaka

2013-01-01T23:59:59.000Z

296

THE STRUCTURE OF TWO-PARABOLIC SPACE: PARABOLIC DUST AND ITERATION.  

E-Print Network (OSTI)

Abstract. A non-elementary Möbius group generated by twoparabolics is determined up to conjugation by one complex parameter and the parameter space has been extensively studied. In this paper, we use the results of [7] to obtain an additional structure for the parameter space, which we term the two-parabolic space. This structure allows us to identify groups that contain additional conjugacy classes of primitive parabolics, which following [14] we call parabolic dust groups, non-free groups off the real axis, and groups that are both parabolic dust and non-free; some of these contain Z × Z subgroups. The structure theorem also attaches additional geometric structure to discrete and non-discrete groups lying in given regions of the parameter space including a new explicit construction of some non-classical T-Schottky groups. 1.

Jane Gilman

2007-01-01T23:59:59.000Z

297

On a parabolic operator of dissipative systems  

E-Print Network (OSTI)

A parabolic integro differential operator operator L suitable to describe many phenomena in various physical fields,is considered. By means of equivalence between L and the third order equation which describe the evolution inside an exponentially shaped Josephson junction (ESJJ), an asymptotic analysis for (ESJJ) is achieved, evaluating explicitly boundary contributions related to the Dirichlet problem.

Monica De Angelis

2013-07-07T23:59:59.000Z

298

Parabolic systems with coupled boundary conditions  

E-Print Network (OSTI)

We consider elliptic operators with operator-valued coefficients and discuss the associated parabolic problems. The unknowns are functions with values in a Hilbert space $W$. The system is equipped with a general class of coupled boundary conditions of the form $f_{|\\partial\\Omega}\\in \\mathcal Y$ and $\\frac{\\partial f}{\\partial \

Stefano Cardanobile; Delio Mugnolo

2008-12-19T23:59:59.000Z

299

Current and Future Economics of Parabolic Trough Technology  

Science Conference Proceedings (OSTI)

Solar energy is the largest energy resource on the planet. Unfortunately, it is largely untapped at present, in part because sunlight is a very diffuse energy source. Concentrating solar power (CSP) systems use low cost reflectors to concentrate the sun's energy to allow it to be used more effectively. Concentrating solar power systems are also well suited for large solar power plants that can be connected into the existing utility infrastructure. These two facts mean that CSP systems can be used to make a meaningful difference in energy supply in a relatively short period. CSP plants are best suited for the arid climates in the Southwestern United States, Northern Mexico, and many desert regions around the globe. A recent Western Governors' Association siting study [1] found that the solar potential in the U.S. Southwest is at least 4 times the total U.S. electric demand even after eliminating urban areas, environmentally sensitive areas, and all regions with a ground slope greater than 1%.While it is currently not practical to power the whole county from the desert southwest, only a small portion of this area is needed to make a substantial contribution to future U.S. electric needs. Many of the best sites are near existing high-voltage transmission lines and close to major power load centers in the Southwest (Los Angeles, Las Vegas, and Phoenix). In addition, the power provided by CSP technologies has strong coincidence with peak electric demand, especially in the Southwest where peak demand corresponds in large part to air conditioning loads. Parabolic troughs currently represent the most cost-effective CSP technology for developing large utility-scale solar electric power systems. These systems are also one of the most mature solar technologies, with commercial utility-scale plants that have been operating for over 20 years. In addition, substantial improvements have been made to the technology in recent years including improved efficiency and the addition of thermal energy storage. The main issue for parabolic trough technology is that the cost of electricity is still higher than the cost of electricity from conventional natural gas-fired power plants. Although higher natural gas prices are helping to substantially reduce the difference between the cost of electricity from solar and natural gas plants, in the near-term increased incentives such as the 30% Investment Tax Credit (ITC) are needed to make CSP technology approach competitiveness with natural gas power on a financial basis. In the longer term, additional reductions in the cost of the technology will be necessary. This paper looks at the near-term potential for parabolic trough technology to compete with conventional fossil power resources in the firm, intermediate load power market and at the longer term potential to compete in the baseload power market. The paper will consider the potential impact of a reduced carbon emissions future.

Price, H.; Mehos, M.; Kutscher, C.; Blair, N.

2007-01-01T23:59:59.000Z

300

NETL: News Release - Four Industry Teams Begin Quest for Low-Cost,  

NLE Websites -- All DOE Office Websites (Extended Search)

August 8, 2001 August 8, 2001 Four Industry Teams Begin Quest for Low-Cost, Breakthrough Fuel Cell Could Broaden Market Acceptance of "Cutting Edge" Technology Cited in President's Climate Change Policy PITTSBURGH, PA - Four new government-industry projects have been selected as the vanguards of a $500 million, 10-year effort to produce breakthrough fuel cells that will shatter current cost barriers and move the advanced, low-polluting technology into mainstream energy markets. - Technician Examining Planar Fuel Cell Assembly Future fuel cells could be mass- produced from flat, ceramic plates. This configuration is called a "planar" fuel cell. Secretary of Energy Spencer Abraham today announced that the U.S. Department of Energy has selected proposals from Honeywell, Inc., Torrence,

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Low-Cost Substrates for High-Performance Nanorod Array LEDs  

SciTech Connect

The completed project, entitled â??Low-Cost Substrates for High-Performance Nanorod LEDs,â? targeted the goal of a phosphor-free nanorod-based white LED with IQE > 50% across the spectrum from 450 nm to 600 nm on metallized silicon substrates. The principal achievements of this project included: â?¢ Demonstration of (In,Ga)N nanopyramid heterostructures by a conventional OMVPE process. â?¢ Verification of complete filtering of threading dislocations to yield dislocation-free pyramidal heterostructures. â?¢ Demonstration of electroluminescence with a peak wavelength of ~600 nm from an (In,Ga)N nanopyramid array LED. â?¢ Development of a reflective ZrN/AlN buffer layer for epitaxial growth of GaN films and GaN nanopyramid arrays on (111)Si.

Sands, Timothy; Stach, Eric; Garcia, Edwin

2009-04-30T23:59:59.000Z

302

A simple, low-cost, data logging pendulum built from a computer mouse  

SciTech Connect

Lessons and homework problems involving a pendulum are often a big part of introductory physics classes and laboratory courses from high school to undergraduate levels. Although laboratory equipment for pendulum experiments is commercially available, it is often expensive and may not be affordable for teachers on fixed budgets, particularly in developing countries. We present a low-cost, easy-to-build rotary sensor pendulum using the existing hardware in a ball-type computer mouse. We demonstrate how this apparatus may be used to measure both the frequency and coefficient of damping of a simple physical pendulum. This easily constructed laboratory equipment makes it possible for all students to have hands-on experience with one of the most important simple physical systems.

Gintautas, Vadas [Los Alamos National Laboratory; Hubler, Alfred [UIUC

2009-01-01T23:59:59.000Z

303

ESS 2012 Peer Review - Low Cost, Manufacturable High Voltage Power Module for ESS - Brandon Passmore, APEI  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

W. Research Center Blvd. * Fayetteville, AR 72701 * (479) 443-5759 W. Research Center Blvd. * Fayetteville, AR 72701 * (479) 443-5759 Design and Development of a Low Cost, Manufacturable High Voltage Power Module for Energy Storage Systems Phase I SBIR September 27, 2012 Brandon Passmore, PhD Sr. Electronics Packaging Research Engineer Email: bpassmo@apei.net Acknowledgements * I would like to thank Dr. Imre Gyuk of the DOE Energy Storage Systems Program and Dr. Stan Atcitty for technical support * I would also like to thank 2 Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.

304

Design Strategies and Preliminary Prototype for a Low-Cost Arsenic Removal System for Rural Bangladesh  

SciTech Connect

Researchers have invented a material called ARUBA -- Arsenic Removal Using Bottom Ash -- that effectively and affordably removes arsenic from Bangladesh groundwater. Through analysis of studies across a range of disciplines, observations, and informal interviews conducted over three trips to Bangladesh, we have applied mechanical engineering design methodology to develop eight key design strategies, which were used in the development of a low-cost, community-scale water treatment system that uses ARUBA to removearsenic from drinking water. We have constructed, tested, and analysed a scale version of the system. Experiments have shown that the system is capable of reducing high levels of arsenic (nearly 600 ppb) to below the Bangladesh standard of 50 ppb, while remaining affordable to people living on less than US$2/day. The system could be sustainably implemented as a public-private partnership in rural Bangladesh.

Mathieu, Johanna L.; Gadgil, Ashok J.; Kowolik, Kristin; Qazi, Shefah; Agogino, Alice M.

2009-09-14T23:59:59.000Z

305

Flat-plate solar collectors utilizing polymeric film for high performance and very low cost  

SciTech Connect

Polymeric films are used in the construction of the absorber and window portions of a flat plate solar collector. The absorber heat exchanger consists of a channeled liquid envelope constructed using a polymeric film and metal foil laminate. In addition, the composite films and light frame monocoque construction contribute to very light weight and low cost. The use of high-performance polymers permits low-loss designs with high thermal performance. The construction concepts are consistent with high speed mass production and installation with manufacturing cost projections of $15/m/sup 2/. Tests performed at Brookhaven National Laboratory (BNL) and elsewhere indicate performance potential consistent with applications incorporating solar absorption air conditioning.

Wilhelm, W.G.

1981-01-01T23:59:59.000Z

306

Advanced gas turbines: The choice for low-cost, environmentally superior electric power generation  

SciTech Connect

In July 1993, the US Department of Energy (DOE) initiated an ambitious 8-year program to advance state-of-the-art gas turbine technology for land-based electric power generation. The program, known as the Advanced Turbine System (ATS) Program, is a joint government/industry program with the objective to demonstrate advanced industrial and utility gas turbine systems by the year 2000. The goals of the ATS Program are to develop gas turbine systems capable of providing low-cost electric power, while maintaining environmental superiority over competing power generation options. A progress report on the ATS Program pertaining to program status at DOE will be presented and reviewed in this paper. The technical challenges, advanced critical technology requirements, and systems designs meeting the goals of the program will be described and discussed.

Zeh, C.M.

1996-08-01T23:59:59.000Z

307

Evaluation of low cost residual gas analyzers for ultrahigh vacuum applications  

DOE Green Energy (OSTI)

In recent years several low cost computer controlled residual gas analyzers (RGAs) have been introduced into the market place. It would be very useful to know the performance characteristics of these RGAs in order to make an informed selection for UHV applications. The UHV applications include extreme sensitivity helium leak detection and monitoring of the residual gas spectra in UHV systems. In this article, the sensitivity and linearity data for nitrogen, hydrogen, and helium are presented in the pressure range 10{sup {minus}8}---10{sup {minus}1} Pa. Further, the relationships between focus voltage and ion currents, relative sensitivity, and fragmentation factor are also included. A direct comparison method is used in obtaining this data. Spinning rotor and extractor gauges are the transfer standard gauges used in Jefferson Lab's vacuum calibration facility, with which all the reported measurements here were carried out.

M. Rao; D. Dong

1996-10-01T23:59:59.000Z

308

Thermal Engineering of Lignin for Low-cost Production of Carbon Fiber  

Science Conference Proceedings (OSTI)

Lignin, a sustainable, renewable resource material, is being evaluated for the low cost production of carbon fiber for automotive and other applications. We previously reported the successful production of carbon fiber from a solvent extracted lignin [1] and from other lignins [2]. However, it was found that the lignin fiber, produced by the melt spinning of the solvent extracted lignin, was difficult to stabilize (i.e., render infusible) and thus carbonize. The long stabilization time, due to the fiber s low Tg, led to the conclusion that thermal engineering of a lignin feedstock could ultimately raise the Tg of the lignin and thereby of the spun fiber. This would permit a higher temperature of stabilization, which would reduce stabilization time as well as overall processing times. The thermally-engineered lignins were evaluated in terms of their rheological properties, melt spinning ability, morphology, stabilization and carbonization properties, and ultimately mechanical properties of the carbon fibers obtained.

Baker, Darren A [ORNL; Baker, Frederick S [ORNL; Gallego, Nidia C [ORNL

2009-01-01T23:59:59.000Z

309

Low cost alternative of high speed visible light camera for tokamak experiments  

SciTech Connect

We present design, analysis, and performance evaluation of a new, low cost and high speed visible-light camera diagnostic system for tokamak experiments. The system is based on the camera Casio EX-F1, with the overall price of approximately a thousand USD. The achieved temporal resolution is up to 40 kHz. This new diagnostic was successfully implemented and tested at the university tokamak GOLEM (R = 0.4 m, a = 0.085 m, B{sub T} < 0.5 T, I{sub p} < 4 kA). One possible application of this new diagnostic at GOLEM is discussed in detail. This application is tomographic reconstruction for estimation of plasma position and emissivity.

Odstrcil, T.; Grover, O.; Svoboda, V. [Czech Technical University in Prague, FNSPE, Brehova 7, CZ-115 19 Praha 1 (Czech Republic); Odstrcil, M.; Duran, I.; Mlynar, J. [Czech Technical University in Prague, FNSPE, Brehova 7, CZ-115 19 Praha 1 (Czech Republic); Institute of Plasma Physics AS CR, v.v.i., Association Euratom-IPP.CR, Za Slovankou 3, CZ-182 00 Praha 8 (Czech Republic)

2012-10-15T23:59:59.000Z

310

Advanced Flywheel Composite Rotors: Low-Cost, High-Energy Density Flywheel Storage Grid Demonstration  

SciTech Connect

GRIDS Project: Boeing is developing a new material for use in the rotor of a low-cost, high-energy flywheel storage technology. Flywheels store energy by increasing the speed of an internal rotor —slowing the rotor releases the energy back to the grid when needed. The faster the rotor spins, the more energy it can store. Boeing’s new material could drastically improve the energy stored in the rotor. The team will work to improve the storage capacity of their flywheels and increase the duration over which they store energy. The ultimate goal of this project is to create a flywheel system that can be scaled up for use by electric utility companies and produce power for a full hour at a cost of $100 per kilowatt hour.

None

2010-10-01T23:59:59.000Z

311

Life and stability testing of packaged low-cost energy storage materials  

DOE Green Energy (OSTI)

A low-cost laminated plastic film which is used to contain a Glauber's salt-based phase change thermal energy storage material in sausage-like containers called Chubs is discussed. The results of tests performed on the Chub packages themselves and on the thermal energy storage capacity of the packaged phase change material are described. From the test results, a set of specifications have been drawn up for a film material which will satisfactorily contain the phase change material under anticipated operating conditions. Calorimetric testing of the phase change material with thermal cycling indicates that a design capacity of 45 to 50 Btu/lb for a ..delta..T of 30/sup 0/F can be used for the packaged material.

Frysinger, G.R.

1980-07-01T23:59:59.000Z

312

State-of-the-art low-cost solar reflector materials  

SciTech Connect

Solar thermal technologies generate power by concentrating sunlight with large mirrors. The National Renewable Energy Laboratory (NREL) is working with industrial partners to develop the optical reflector materials needed for the successful deployment of this technology. The reflector materials must be low in cost and maintain high specular reflectance for extended lifetimes in severe outdoor environments. Currently, the best candidate materials for solar mirrors are silver-coated low-iron glass and silvered polymer films. Polymer reflectors are lighter in weight, offer greater flexibility in system design, and have the potential for lower cost than glass mirrors. In parallel with collaborative activities, several innovative candidate reflector-material constructions were investigated at NREL. The low-cost material requirement necessitates manufacturing compatible with mass-production techniques. Future cooperative efforts with the web-coating industry offers the promise of exciting new alternative materials and the potential for dramatic cost savings in developing advanced solar reflector materials.

Kennedy, C; Jorgensen, G

1994-11-01T23:59:59.000Z

313

Demonstrating Innovative Low-Cost Carbon Fiber for Energy and National Security Applications  

NLE Websites -- All DOE Office Websites (Extended Search)

Innovative Innovative Low-Cost Carbon Fiber for Energy and National Security Applications Front-end creel for processing precursor in tow format In-line melt spinning for precursor development (lignins, polymers) Belt conveyance for processing precursor in web format Multiple flow regimens in oxidation ovens Low-temperature furnace up to 1,000°C High-temperature furnace up to 2,000°C Flexible posttreatment for various resin systems Winding and packaging Carbon fiber is a strong, stiff, lightweight enabling material for improved performance in many applications. However, its use in cost-sensitive, high-volume industrial applications such as automobiles, wind energy, oil and gas, and infrastructure is limited because of today's relatively high price. Current methods for manufacturing carbon fiber

314

Low-Cost Silicon Solar Array Project quarterly report-2, July 1976--September 1976  

DOE Green Energy (OSTI)

The potential for future widespread use of photovoltaic systems for the generation of electric power was the motivation for the establishment, in January 1975, of the Photovoltaic Conversion Program by ERDA's Division of Solar Energy. The Program's activities are planned to develop and to promote the use of photovoltaic systems to such an extent that the private sector will produce and utilize cost-competitive photovoltaic systems. As part of the ERDA Program, the Low-Cost Silicon Solar Array Project (LCSSAP) was established in January 1975. The project objective is to develop the national capability to produce low-cost, long-life photovoltaic arrays at a rate greater than 500 megawatts per year and a price of less than $500 per kilowatt peak by 1986. The array performance objectives include an efficiency greater than 10% and an operating lifetime in excess of 20 years. The approach is to reduce the cost of solar cell arrays by improving solar array manufacturing technology and by increasing solar array production capacity and quantity. Forty-three contracts have been awarded to date, to industrial firms and university and independent laboratories for experimental work, process development and analysis, technology assessment, and the production of solar-array modules. Approximately 42 kW of state-of-the-art modules have been delivered; contracts have been issued and design development has begun for 130 kW of moderately advanced modules. Efforts of the LCSSA Project are organized into an Analysis and Integration Task, four Technology Development Tasks--covering the areas of Silicon Material, Large Area Silicon Sheet, Encapsulation, and Automated Array Assembly--and a Large Scale Procurement Task, an Engineering Task, and an Operations Task. Research findings are discussed, and project planning is outlined.

Not Available

1976-01-01T23:59:59.000Z

315

Low-Cost Silicon Solar Array Project quarterly report-2, July 1976--September 1976  

SciTech Connect

The potential for future widespread use of photovoltaic systems for the generation of electric power was the motivation for the establishment, in January 1975, of the Photovoltaic Conversion Program by ERDA's Division of Solar Energy. The Program's activities are planned to develop and to promote the use of photovoltaic systems to such an extent that the private sector will produce and utilize cost-competitive photovoltaic systems. As part of the ERDA Program, the Low-Cost Silicon Solar Array Project (LCSSAP) was established in January 1975. The project objective is to develop the national capability to produce low-cost, long-life photovoltaic arrays at a rate greater than 500 megawatts per year and a price of less than $500 per kilowatt peak by 1986. The array performance objectives include an efficiency greater than 10% and an operating lifetime in excess of 20 years. The approach is to reduce the cost of solar cell arrays by improving solar array manufacturing technology and by increasing solar array production capacity and quantity. Forty-three contracts have been awarded to date, to industrial firms and university and independent laboratories for experimental work, process development and analysis, technology assessment, and the production of solar-array modules. Approximately 42 kW of state-of-the-art modules have been delivered; contracts have been issued and design development has begun for 130 kW of moderately advanced modules. Efforts of the LCSSA Project are organized into an Analysis and Integration Task, four Technology Development Tasks--covering the areas of Silicon Material, Large Area Silicon Sheet, Encapsulation, and Automated Array Assembly--and a Large Scale Procurement Task, an Engineering Task, and an Operations Task. Research findings are discussed, and project planning is outlined.

1976-01-01T23:59:59.000Z

316

Low-Cost Silicon Solar Array Project. Quarterly report 3, October 1976--December 1976  

SciTech Connect

The potential for future widespread use of photovoltaic systems for the generation of electric power was the motivation for the establishment, in January 1975, of the Photovoltaic Conversion Program by ERDA's Division of Solar Energy. The Program's activities are planned to develop and to promote the use of photovoltaic systems to such an extent that the private sector will produce and utilize cost-competitive photovoltaic systems. As part of the ERDA Program, the Low-Cost Silicon Solar Array Project (LSSA) was established in January 1975. The activities and progress of the LSSA Project during the months of October, November, and December 1976 are described. The Project objective is to develop the national capability to produce low-cost, long-life photovoltaic arrays at a rate greater than 500 megawatts per year and a price of less than $500 per kilowatt peak by 1986. The array performance goals include an efficiency greater than 10% and an operating lifetime in excess of 20 years. The approach is to reduce the cost of solar cell arrays by improving solar array manufacturing technology and by increasing solar array production capacity and quantity. Forty-seven contracts have been awarded to date, to industrial firms and university and independent laboratories for experimental work, process development and analysis, technology assessment, and the production of solar-array modules. Approximately 58 kW of state-of-the-art modules have been delivered; design development is under way for a second block of moderately advanced modules, and planning for subsequent module procurements has begun.

1976-01-01T23:59:59.000Z

317

Low-Cost Silicon Solar Array Project. Quarterly report 3, October 1976--December 1976  

DOE Green Energy (OSTI)

The potential for future widespread use of photovoltaic systems for the generation of electric power was the motivation for the establishment, in January 1975, of the Photovoltaic Conversion Program by ERDA's Division of Solar Energy. The Program's activities are planned to develop and to promote the use of photovoltaic systems to such an extent that the private sector will produce and utilize cost-competitive photovoltaic systems. As part of the ERDA Program, the Low-Cost Silicon Solar Array Project (LSSA) was established in January 1975. The activities and progress of the LSSA Project during the months of October, November, and December 1976 are described. The Project objective is to develop the national capability to produce low-cost, long-life photovoltaic arrays at a rate greater than 500 megawatts per year and a price of less than $500 per kilowatt peak by 1986. The array performance goals include an efficiency greater than 10% and an operating lifetime in excess of 20 years. The approach is to reduce the cost of solar cell arrays by improving solar array manufacturing technology and by increasing solar array production capacity and quantity. Forty-seven contracts have been awarded to date, to industrial firms and university and independent laboratories for experimental work, process development and analysis, technology assessment, and the production of solar-array modules. Approximately 58 kW of state-of-the-art modules have been delivered; design development is under way for a second block of moderately advanced modules, and planning for subsequent module procurements has begun.

Not Available

1976-01-01T23:59:59.000Z

318

THE CHERN CHARACTER OF A PARABOLIC BUNDLE, AND A PARABOLIC REZNIKOV THEOREM IN THE CASE OF FINITE ORDER AT INFINITY  

E-Print Network (OSTI)

In this paper, we obtain an explicit formula for the Chern character of a locally abelian parabolic bundle in terms of its constituent bundles. Several features and variants of parabolic structures are discussed. Parabolic bundles arising from logarithmic connections form an important class of examples. As an application, we consider the situation when the local monodromies are semi-simple and are of finite order at infinity. In this case the parabolic Chern classes of the associated locally abelian parabolic bundle are deduced to be zero in the rational Deligne cohomology in degrees ? 2.

Jaya Nn Iyer; Carlos T Simpson

2007-01-01T23:59:59.000Z

319

Fig. 1. Artist's concept of the 1-D parabolic cylinder reflector. The re-flector has a parabolic shape in the short dimension and a flat profile in  

E-Print Network (OSTI)

Fig. 1. Artist's concept of the 1-D parabolic cylinder reflector. The re- flector has a parabolic [1]. A stationary linear parabolic reflector with a diameter of 1.6 m and a length of 2 m would

Ruf, Christopher

320

Experimental parabolic trough collector performance characterization  

DOE Green Energy (OSTI)

Experimental data from the Collector Module Test Facility (CMTF) at Sandia National Laboratories, Albuquerque, are used to develop a collector performance model and characterize three parabolic trough solar collectors. The independent variables used in the model are selected and fitted to the experimental data using a multiple linear regression technique. The collector model developed accounts for optical performance, including incident angle effects and thermal losses, both linear and non-linear.

Lukens, L.L.

1981-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
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321

Near-Net Shape Fabrication Using Low-Cost Titanium Alloy Powders  

SciTech Connect

The use of titanium in commercial aircraft production has risen steadily over the last half century. The aerospace industry currently accounts for 58% of the domestic titanium market. The Kroll process, which has been used for over 50 years to produce titanium metal from its mineral form, consumes large quantities of energy. And, methods used to convert the titanium sponge output of the Kroll process into useful mill products also require significant energy resources. These traditional approaches result in product forms that are very expensive, have long lead times of up to a year or more, and require costly operations to fabricate finished parts. Given the increasing role of titanium in commercial aircraft, new titanium technologies are needed to create a more sustainable manufacturing strategy that consumes less energy, requires less material, and significantly reduces material and fabrication costs. A number of emerging processes are under development which could lead to a breakthrough in extraction technology. Several of these processes produce titanium alloy powder as a product. The availability of low-cost titanium powders may in turn enable a more efficient approach to the manufacture of titanium components using powder metallurgical processing. The objective of this project was to define energy-efficient strategies for manufacturing large-scale titanium structures using these low-cost powders as the starting material. Strategies include approaches to powder consolidation to achieve fully dense mill products, and joining technologies such as friction and laser welding to combine those mill products into near net shape (NNS) preforms for machining. The near net shape approach reduces material and machining requirements providing for improved affordability of titanium structures. Energy and cost modeling was used to define those approaches that offer the largest energy savings together with the economic benefits needed to drive implementation. Technical feasibility studies were performed to identify the most viable approaches to NNS preform fabrication using basic powder metallurgy mill product forms as the building blocks and advanced joining techniques including fusion and solid state joining to assemble these building blocks into efficient machining performs.

Dr. David M. Bowden; Dr. William H. Peter

2012-03-31T23:59:59.000Z

322

Enery Efficient Press and Sinter of Titanium Powder for Low-Cost Components in Vehicle Applications  

SciTech Connect

This is the final technical report for the Department of Energy NETL project NT01931 Energy Efficient Press and Sinter of Titanium Powder for Low-Cost Components in Vehicle Applications. Titanium has been identified as one of the key materials with the required strength that can reduce the weight of automotive components and thereby reduce fuel consumption. Working with newly developed sources of titanium powder, Webster-Hoff will develop the processing technology to manufacture low cost vehicle components using the single press/single sinter techniques developed for iron based powder metallurgy today. Working with an automotive or truck manufacturer, Webster-Hoff will demonstrate the feasibility of manufacturing a press and sinter titanium component for a vehicle application. The project objective is two-fold, to develop the technology for manufacturing press and sinter titanium components, and to demonstrate the feasibility of producing a titanium component for a vehicle application. The lowest cost method for converting metal powder into a net shape part is the Powder Metallurgy Press and Sinter Process. The method involves compaction of the metal powder in a tool (usually a die and punches, upper and lower) at a high pressure (up to 60 TSI or 827 MPa) to form a green compact with the net shape of the final component. The powder in the green compact is held together by the compression bonds between the powder particles. The sinter process then converts the green compact to a metallurgically bonded net shape part through the process of solid state diffusion. The goal of this project is to expand the understanding and application of press and sinter technology to Titanium Powder applications, developing techniques to manufacture net shape Titanium components via the press and sinter process. In addition, working with a vehicle manufacturer, demonstrate the feasibility of producing a titanium component for a vehicle. This is not a research program, but rather a project to develop a process for press and sinter of net shape Titanium components. All of these project objectives have been successfully completed.

Thomas Zwitter; Phillip Nash; Xiaoyan Xu; Chadwick Johnson

2011-03-31T23:59:59.000Z

323

Parabolic Trough Organic Rankine Cycle Power Plant  

DOE Green Energy (OSTI)

Arizona Public Service (APS) is required to generate a portion of its electricity from solar resources in order to satisfy its obligation under the Arizona Environmental Portfolio Standard (EPS). In recent years, APS has installed and operates over 4.5 MWe of fixed, tracking, and concentrating photovoltaic systems to help meet the solar portion of this obligation and to develop an understanding of which solar technologies provide the best cost and performance to meet utility needs. During FY04, APS began construction of a 1-MWe parabolic trough concentrating solar power plant. This plant represents the first parabolic trough plant to begin construction since 1991. The plant will also be the first commercial deployment of the Solargenix parabolic trough collector technology developed under contract to the National Renewable Energy Laboratory (NREL). The plant will use an organic Rankine cycle (ORC) power plant, provided by Ormat. The ORC power plant is much simpler than a conventional steam Rankine cycle power plant and allows unattended operation of the facility.

Canada, S.; Cohen, G.; Cable, R.; Brosseau, D.; Price, H.

2005-01-01T23:59:59.000Z

324

Low cost, single crystal-like substrates for practical, high efficiency solar cells  

Science Conference Proceedings (OSTI)

It is well established that high efficiency (20%) solar cells can be routinely fabricated using single crystal photovoltaic (PV) materials with low defect densities. Polycrystalline materials with small grain sizes and no crystallographic texture typically result in reduced efficiences. This has been ascribed primarily to the presence of grain boundaries and their effect on recombination processes. Furthermore, lack of crystallographic texture can result in a large variation in dopant concentrations which critically control the electronic properties of the material. Hence in order to reproducibly fabricate high efficiency solar cells a method which results in near single crystal material is desirable. Bulk single crystal growth of PV materials is cumbersome, expensive and difficult to scale up. We present here a possible route to achieve this if epitaxial growth of photovoltaic materials on rolling-assisted-biaxially textured-substrates (RABiTS) can be achieved. The RABiTS process uses well-established, industrially scaleable, thermomechanical processing to produce a biaxially textured or single-crystal-like metal substrate with large grains (50-100 {mu}m). This is followed by epitaxial growth of suitable buffer layers to yield chemically and structurally compatible surfaces for epitaxial growth of device materials. Using the RABiTS process it should be possible to economically fabricate single-crystal-like substrates of desired sizes. Epitaxial growth of photovoltaic devices on such substrates presents a possible route to obtaining low-cost, high performance solar cells.

Goyal, A.; Specht, E.D.; List, F.A. [and others

1997-09-01T23:59:59.000Z

325

NETL: News Release - Colorado Company Pursues Low-Cost, Low-Impact  

NLE Websites -- All DOE Office Websites (Extended Search)

10, 2007 10, 2007 Colorado Company Pursues Low-Cost, Low-Impact Technology to Develop Nation's Oil Shale Resources DOE-Funded Research Targets America's Largest Potential Source of Oil WASHINGTON, DC - A U.S. Department of Energy-funded project has successfully demonstrated the viability of a new technology that could prove to be the key to unlocking America's largest potential source of oil. If ongoing research continues to confirm the technology's effectiveness, its application offers the potential to dramatically reduce costs and environmental impacts in the extraction of oil from oil shale. America holds more than three-fourths of the world's estimated 2.6 trillion barrels of oil-in-place of oil shale resources. As much as 1.1 trillion barrels of oil equivalent is believed to be recoverable in the richest single deposit - the Green River formation of Colorado, Utah, and Wyoming. That volume is almost 50 percent greater than the combined proved reserves of conventional oil in the entire Middle East.

326

Large scale production task: low cost silicon solar array project. Final technical report  

DOE Green Energy (OSTI)

Several design concepts were evaluated and compared with respect to potential for low cost and automation, protection against weathering, potential for array efficiency as a function of weight and area, potential for design flexibility and exposure to electrical breakdown or leakage to ground. This evaluation program narrowed attention to design concepts involving glass as the primary structural and weather resistant component of the module. The leading specific design structure consisted of the solar cell circuit embedded in polyvinyl butyrate by lamination between a glass front surface and a polyester film rear surface. Preliminary evaluation of this structure in high humidity and thermal cycle was promising, and extensive field experience with similar structures in architectural and automotive applications was favorable. The specific design proposed was comprised of 120 two-inch diameter cells in a series-parallel configuration. The laminate was mounted in an aluminum frame with a neoprene gasket providing the requisite mechanical strength with flexibility. The resulting module size of 15 by 46 inches permits three modules to be neatly fitted into the 46 inch square subarray specified by JPL. The design as modified to accommodate subsequent experience is shown. Performance and environmental test results are presented and discussed.

Not Available

1978-09-01T23:59:59.000Z

327

Low cost/low intensity 50 MeV proton irradiation facility  

SciTech Connect

Protons have been proposed as one of the most useful particles for radiation therapy, but have found limited use due to the cost and scarcity of medium energy proton accelerators. However, the highly successful program on the Harvard Cyclotron has increased interest in expanding the number of treatment facilities. In order to demonstrate that high intensity proton accelerators are not required and to gain experience with treating patients using protons, a low cost and low intensity source of 50 MeV protons was developed at Argonne. Although the beam penetration is limited to 22 mm, the beam is capable of treating a major fraction of the ocular melanoma tumors treated at the Harvard Cyclotron. This beam operates parasitically with the Rapid Cycling Synchrotron at Argonne using a source of 50 MeV H/sup 0/ atoms which are produced by stripping in the gas of the 50 MeV H/sup -/ linear accelerator. A stripping fraction of about 3 to 5 x 10/sup -5/ is observed and yields a 0.4 namp beam of protons. Results on the properties and operation of this parasitic beam are presented. 5 refs., 3 figs.

Kramer, S.L.; Martin, R.L.

1985-01-01T23:59:59.000Z

328

Photovoltaic solar panel resistance to simulated hail. Low-Cost Solar Array Project  

SciTech Connect

As part of the Jet Propulsion Laboratory's Low-Cost Solar Array Project, test methods have been evaluated and procedures developed for testing photovoltaic flat-plate solar cell modules for resistance to impact by hailstones. Testing has included the use of simulated hailstones (frozen ice spheres projected at terminal velocity), steel balls, and other projectile types applied with three loading methods: pneumatic gun, gravity drop, and static loading. Results are presented that compare the advantages and disadvantages of the three test methods. Dropped-steel-ball tests are shown to exhibit little correlation with high-velocity ice-ball tests, whereas statically-loaded steel balls show a somewhat better correlation with ice-ball tests. Results are also presented on the hail impact strength of 16 flat-plate photovoltaic modules. The module designs tested have been shown to be capable of withstanding as large as 1-1/2-inch diameter and not capable of withstanding as small as 1/2-inch diameter simulated hail. The top surface material of the modules has a dominant influence on the hail impact resistance of the modules. In order of increasing impact strength for a given thickness, the top surface materials encountered in the modules tester were: clear silicone rubber, annealed glass, tempered glass, and acrylic sheet. The critical failure mechanism of each module type is explored and means for improving the hail resistance of future modules are described.

Moore, D.; Wilson, A.

1978-10-15T23:59:59.000Z

329

Low cost fabrication of silicon carbide based ceramics and fiber reinforced composites  

SciTech Connect

A low cost processing technique called reaction forming for the fabrication of near-net and complex shaped components of silicon carbide based ceramics and composites is presented. This process consists of the production of a microporous carbon preform and subsequent infiltration with liquid silicon or silicon-refractory metal alloys. The microporous preforms are made by the pyrolysis of a polymerized resin mixture with very good control of pore volume and pore size thereby yielding materials with tailorable microstructure and composition. Mechanical properties (elastic modulus, flexural strength, and fracture toughness) of reaction-formed silicon carbide ceramics are presented. This processing approach is suitable for various kinds of reinforcements such as whiskers, particulates, fibers (tows, weaves, and filaments), and 3-D architectures. This approach has also been used to fabricate continuous silicon carbide fiber reinforced ceramic composites (CFCC`s) with silicon carbide based matrices. Strong and tough composites with tailorable matrix microstructure and composition have been obtained. Microstructure and thermomechanical properties of a silicon carbide (SCS-6) fiber reinforced reaction-formed silicon carbide matrix composites are discussed.

Singh, M.; Levine, S.R.

1995-07-01T23:59:59.000Z

330

Low-cost, low-weight CNG cylinder development. Final report  

DOE Green Energy (OSTI)

This program was established to develop and commercialize new high-strength steel-lined, composite hoop-wrapped compressed natural gas (CNG) cylinders for vehicular applications. As much as 70% of the cost of natural gas vehicles can be related to on-board natural gas storage costs. The cost and weight targets for this program represent significant savings in each characteristic when compared to comparable containers available at the initiation of the program. The program objectives were to optimize specific weight and cost goals, yielding CNG cylinders with dimensions that should, allowing for minor modifications, satisfy several vehicle market segments. The optimization process encompassed material, design, and process improvement. In optimizing the CNG cylinder design, due consideration was given to safety aspects relative to national, international, and vehicle manufacturer cylinder standards and requirements. The report details the design and development effort, encompassing plant modifications, material selection, design issues, tooling development, prototype development, and prototype testing. Extenuating circumstances prevented the immediate commercialization of the cylinder designs, though significant progress was made towards improving the cost and performance of CNG cylinders. A new low-cost fiber was successfully employed while the weight target was met and the cost target was missed by less than seven percent.

Richards, Mark E.; Melford, K.; Wong, J.; Gambone, L.

1999-09-01T23:59:59.000Z

331

Low-cost silicon solar array project. First annual report, January 1975--March 1976  

DOE Green Energy (OSTI)

The Low-Cost Silicon Solar Array Project (LSSA) was established to greatly reduce the price of solar arrays by the improvement of manufacturing technology, by adaptation of mass production techniques, and by helping achievement of user acceptance. The Project's approach includes the development of technology, its transfer by industry to commercial practice, the evaluation of the economics involved, and the stimulation of market growth. The activities and progress of the LSSA Project during its first year are described in this document which covers all Project activities, with primary emphasis on the technical plans and accomplishments. The development of manufacturing technology is now and will continue to be performed principally by industries and universities. To date, 24 contractors are working on new silicon-refinement processes, silicon-sheet-growth techniques, encapsulants, and automated-assembly studies. Nine more contractors have been selected to perform additional technology investigations and their contracts are being negotiated. Additional contracts will be issued in the future as promising ideas appear. (WDM)

Not Available

1976-08-09T23:59:59.000Z

332

Recovery Act: Low-Cost, Highly Lambertian Reflector Composite For Improved LED Fixture Efficiency and Lifetime  

SciTech Connect

The overall objective of the program was to demonstrate a 98% or greater reflective, highly diffuse, low-cost composite material that significantly improves luminaire efficiency, is able to withstand 50,000 hours or greater luminaire operation under expected LED system thermal and environmental operating extremes and meets the cost targets required to be an effective commercial solution for the Solid State Lighting industry. This project met most of the goals defined and contributed to the understanding of high reflectance, white coatings. Research under this program increased the understanding of coatings development using particle size reduction techniques and preparation of coating solutions with a broad range of particle types. The research explored scale-up of coating systems and generated understanding of processing required for high volume manufacturing applications. The work demonstrated how coating formulation and application technique can translate to material durability and LED system lifetime. The research also demonstrated improvements in lighting efficiency to be gained using high reflectance white coatings.

Teather, Eric

2013-02-15T23:59:59.000Z

333

Method for producing low-cost, high volume hydrogen from hydrocarbon sources  

DOE Patents (OSTI)

A method is described for the conversion of naturally-occurring or biomass-derived lower to higher hydrocarbon (C{sub x}H{sub y},where x may vary from 1--3 and y may vary from 4--8) to low-cost, high-volume hydrogen. In one embodiment, methane, the major component of natural gas, is reacted in a single reaction zone of a mixed-conducting ceramic membrane reactor to form hydrogen via simultaneous partial oxidation and water gas shift reactions at temperatures required for thermal excitations of the mixed-conducting membranes. The hydrogen is produced by catalytically reacting the hydrocarbon with oxygen to form synthesis gas (a mixture of carbon monoxide and hydrogen), followed by a water gas shift (WGS) reaction with steam, wherein both reactions occur in a single reaction zone having a multi-functional catalyst or a combination of catalysts. The hydrogen is separated from other reaction products by membrane-assisted transport or by pressure-swing adsorption technique. Membrane-assisted transport may occur via proton transfer or molecular sieving mechanisms.

Bose, Arun C.; Balachandran, Uthamalinga; Kleerfisch, Mark S.; Udovich, Carl A.; Stiegel, Gary J.

1997-12-01T23:59:59.000Z

334

An Exploratory Initiative for Improving Low-Cost Housing in Texas  

E-Print Network (OSTI)

In 1996 the Real Estate Center at Texas A&M University released a report indicating that the population of Texas would double in the next 30 years and that a majority of the 18 million new Texans would be have low to very-low incomes. In order to house that many low income persons, it is apparent that a significant number of affordable housing units must be built in a relatively short time frame. Based on these predictions, our interdisciplinary team made a proposal in the Texas Engineering Experiment Station (TEES) Strategic Initiatives Program to explore technologies related to the production of affordable housing. The purpose of the work is to identify opportunities for research into systems, materials, and processes that might contribute to the development of a low-cost housing industry in Texas that could meet state housing needs and might create export possibilities. The proposal was funded by the Texas Engineering Experiment Station, the Center for Housing and Urban Development, and the College of Architecture Research Fund. This report summarizes the results of the effort.

McKittrick, T. L.; Haberl, J. S.; Graham, C. W.; Claridge, D. E.; Swain, W. B.

2000-01-01T23:59:59.000Z

335

Sensing from the basement: a feasibility study of unobtrusive and low-cost home activity recognition  

E-Print Network (OSTI)

The home deployment of sensor-based systems offers many opportunities, particularly in the area of using sensor-based systems to support aging in place by monitoring an elder’s activities of daily living. But existing approaches to home activity recognition are typically expensive, difficult to install, or intrude into the living space. This paper considers the feasibility of a new approach that “reaches into the home ” via the existing infrastructure. Specifically, we deploy a small number of low-cost sensors at critical locations in a home’s water distribution infrastructure. Based on water usage patterns, we can then infer activities in the home. To examine the feasibility of this approach, we deployed real sensors into a real home for six weeks. Among other findings, we show that a model built on microphone-based sensors that are placed away from systematic noise sources can identify 100 % of clothes washer usage, 95 % of dishwasher usage, 94 % of showers, 88 % of toilet flushes, 73 % of bathroom sink activity lasting ten seconds or longer, and 81 % of kitchen sink activity lasting ten seconds or longer. While there are clear limits to what activities can be detected when analyzing water usage, our new approach represents a sweet spot in the tradeoff between what information is collected at what cost.

James Fogarty

2006-01-01T23:59:59.000Z

336

Low-cost photovoltaic inverters incorporating application-specific integrated circuits  

SciTech Connect

The positive impact of designing a power conditioner control system for photovoltaic applications with an application-specific integrated circuit (ASIC) as the main control element was demonstrated with detailed computer simulations in Phase I of a two phase Small Business Innovative Research Grant issued by the US Department of Energy. Completion of the design, building and testing of three prototypes using different power semiconductors was successfully accomplished in Phase II. The power rating for the residential utility intertied Sunverters Model 753-4-200 is 5 kW. A stand-alone inverter suitable for operation from a photovoltaic array with or without a battery for energy storage was also developed in this effort. A much needed intermediate power level 50-kW three-phase power conditioner, Sunverter Model 759-4-200, was the third product to evolve from the research and development. All designs take advantage of the ASIC and a complementary microprocessor sampled-data control system. The ASIC-controlled power conditioners provide the high reliability, high efficiency, and low cost needed for photovoltaic applications. They cover the power range from the residential level to utility-sized installations.

O`Sullivan, G.A. [Abacus Controls, Inc., Somerville, NJ (United States); O`Sullivan, J.A. [Washington Univ., St. Louis, MO (United States)

1993-10-01T23:59:59.000Z

337

Photovoltaic solar panel resistance to simulated hail. Low-Cost Solar Array Project  

DOE Green Energy (OSTI)

As part of the Jet Propulsion Laboratory's Low-Cost Solar Array Project, test methods have been evaluated and procedures developed for testing photovoltaic flat-plate solar cell modules for resistance to impact by hailstones. Testing has included the use of simulated hailstones (frozen ice spheres projected at terminal velocity), steel balls, and other projectile types applied with three loading methods: pneumatic gun, gravity drop, and static loading. Results are presented that compare the advantages and disadvantages of the three test methods. Dropped-steel-ball tests are shown to exhibit little correlation with high-velocity ice-ball tests, whereas statically-loaded steel balls show a somewhat better correlation with ice-ball tests. Results are also presented on the hail impact strength of 16 flat-plate photovoltaic modules. The module designs tested have been shown to be capable of withstanding as large as 1-1/2-inch diameter and not capable of withstanding as small as 1/2-inch diameter simulated hail. The top surface material of the modules has a dominant influence on the hail impact resistance of the modules. In order of increasing impact strength for a given thickness, the top surface materials encountered in the modules tester were: clear silicone rubber, annealed glass, tempered glass, and acrylic sheet. The critical failure mechanism of each module type is explored and means for improving the hail resistance of future modules are described.

Moore, D.; Wilson, A.

1978-10-15T23:59:59.000Z

338

NREL: TroughNet - Parabolic Trough Power Plant System Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Parabolic Trough Power Plant System Technology Parabolic Trough Power Plant System Technology A parabolic trough solar power plant uses a large field of collectors to supply thermal energy to a conventional power plant. Because they use conventional power cycles, parabolic trough power plants can be hybridized-other fuels can be used to back up the solar power. Like all power cycles, trough power plants also need a cooling system to transfer waste heat to the environment. Parabolic trough power plant technologies include: Direct steam generation Fossil-fired (hybrid) backup Operation and maintenance Power cycles Steam Rankine Organic Rankine Combined Wet and dry cooling Power Cycles A photo of an aerial view of a power plant in the middle of a solar field with rows and rows of parabolic troughs tracking. The cooling towers can be seen with the water plume rising into the air. The white water tanks can be seen in the background.

339

Poincar'e polynomial of the moduli spaces of parabolic bundles  

E-Print Network (OSTI)

Poincar'e polynomial of the moduli spaces of parabolic bundles Yogish I. Holla March 7, 2000 School of the moduli spaces of semi­stable parabolic bundles on a curve. The quasi parabolic analogue of the Siegel for determine the Betti numbers of the moduli of semistable parabolic bundles on a curve (when parabolic semi

Holla, Yogish I.

340

Optimal Heat Collection Element Shapes for Parabolic Trough Concentrators  

DOE Green Energy (OSTI)

For nearly 150 years, the cross section of the heat collection tubes used at the focus of parabolic trough solar concentrators has been circular. This type of tube is obviously simple and easily fabricated, but it is not optimal. It is shown in this article that the optimal shape, assuming a perfect parabolic figure for the concentrating mirror, is instead oblong, and is approximately given by a pair of facing parabolic segments.

Bennett, C

2007-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Hydrogen Removal From Heating Oil of a Parabolic Trough ...  

Hydrogen Removal From Heating Oil of a Parabolic Trough Increases the Life of the Trough and its Components A Method to Selectively Remove & Measure Hydrogen Gas from ...

342

Parabolic Trough Solar Thermal Electric Power Plants (Fact Sheet)  

DOE Green Energy (OSTI)

This fact sheet provides an overview of the potential for parabolic trough solar thermal electric power plants, especially in the Southwestern U.S.

Not Available

2006-07-01T23:59:59.000Z

343

Parabolic Trough VSHOT Optical Characterization in 2005-2006 (Presentation)  

DOE Green Energy (OSTI)

This presentation regarding parabolic trough VSHOT optical characterization describes trough deployment and operation phases including: development, manufacture/installation, and maintenance/operation.

Wendelin, T.

2006-02-01T23:59:59.000Z

344

Hydrogen Removal From Heating Oil of a Parabolic Trough ...  

A Method to Selectively Remove & Measure Hydrogen Gas from a Fluid Volume Parabolic trough power plants use concentrated solar thermal energy to ...

345

Estimates in the Generalized Morrey Space for Linear Parabolic Systems.  

E-Print Network (OSTI)

??The purpose of the this paper is to study the parabolic system uti - D_?(aij??D_?uj) = -div fi in the generalized Morrey Space L_?2,? .… (more)

McBride, Matthew Scott

2007-01-01T23:59:59.000Z

346

Long-term average performance benefits of parabolic trough improvements  

DOE Green Energy (OSTI)

Improved parabolic trough concentrating collectors will result from better design, improved fabrication techniques, and the development and utilization of improved materials. This analysis quantifies the relative merit of various technological advancements in improving the long-term average performance of parabolic trough concentrating collectors and presents them graphically as a function of operating temperature for north-south, east-west, and polar mounted parabolic troughs. Substantial annual energy gains (exceeding 50% at 350/sup 0/C) are shown to be attainable with improved parabolic troughs.

Gee, R.; Gaul, H.; Kearney, D.; Rabl, A.

1979-10-01T23:59:59.000Z

347

Simplified Methodology for Designing Parabolic Trough Solar Power Plants.  

E-Print Network (OSTI)

??The performance of parabolic trough based solar power plants over the last 25 years has proven that this technology is an excellent alternative for the… (more)

Vasquez Padilla, Ricardo

2011-01-01T23:59:59.000Z

348

Simplified Methodology for Designing Parabolic Trough Solar Power Plants.  

E-Print Network (OSTI)

?? The performance of parabolic trough based solar power plants over the last 25 years has proven that this technology is an excellent alternative for… (more)

Vasquez Padilla, Ricardo

2011-01-01T23:59:59.000Z

349

post-pareto analysis for multiobjective parabolic control systems  

E-Print Network (OSTI)

Jul 29, 2012 ... POST-PARETO ANALYSIS FOR MULTIOBJECTIVE PARABOLIC CONTROL SYSTEMS. Henri Bonnel (bonnel ***at*** univ-nc.nc). Abstract: In ...

350

Field Survey of Parabolic Trough Receiver Thermal Performance: Preprint  

SciTech Connect

This paper describes a technique that uses an infrared camera to evaluate the in-situ thermal performance of parabolic trough receivers at operating solar power plants.

Price, H.; Forristall, R.; Wendelin, T.; Lewandowski, A.; Moss, T.; Gummo, C.

2006-04-01T23:59:59.000Z

351

A LOW COST AND HIGH QUALITY SOLID FUEL FROM BIOMASS AND COAL FINES  

SciTech Connect

Use of biomass wastes as fuels in existing boilers would reduce greenhouse gas emissions, SO2 and NOx emissions, while beneficially utilizing wastes. However, the use of biomass has been limited by its low energy content and density, high moisture content, inconsistent configuration and decay characteristics. If biomass is upgraded by conventional methods, the cost of the fuel becomes prohibitive. Altex has identified a process, called the Altex Fuel Pellet (AFP) process, that utilizes a mixture of biomass wastes, including municipal biosolids, and some coal fines, to produce a strong, high energy content, good burning and weather resistant fuel pellet, that is lower in cost than coal. This cost benefit is primarily derived from fees that are collected for accepting municipal biosolids. Besides low cost, the process is also flexible and can incorporate several biomass materials of interest The work reported on herein showed the technical and economic feasibility of the AFP process. Low-cost sawdust wood waste and light fractions of municipal wastes were selected as key biomass wastes to be combined with biosolids and coal fines to produce AFP pellets. The process combines steps of dewatering, pellet extrusion, drying and weatherizing. Prior to pilot-scale tests, bench-scale test equipment was used to produce limited quantities of pellets for characterization. These tests showed which pellet formulations had a high potential. Pilot-scale tests then showed that extremely robust pellets could be produced that have high energy content, good density and adequate weatherability. It was concluded that these pellets could be handled, stored and transported using equipment similar to that used for coal. Tests showed that AFP pellets have a high combustion rate when burned in a stoker type systems. While NOx emissions under stoker type firing conditions was high, a simple air staging approach reduced emissions to below that for coal. In pulverized-fuel-fired tests it was found that the ground pellets could be used as an effective NOx control agent for pulverized-coal-fired systems. NOx emissions reductions up to 63% were recorded, when using AFP as a NOx control agent. In addition to performance benefits, economic analyses showed the good economic benefits of AFP fuel. Using equipment manufacturer inputs, and reasonable values for biomass, biosolids and coal fines costs, it was determined that an AFP plant would have good profitability. For cases where biosolids contents were in the range of 50%, the after tax Internal Rates of Return were in the range of 40% to 50%. These are very attractive returns. Besides the baseline analysis for the various AFP formulations tested at pilot scale, sensitivity analysis showed the impact of important parameters on return. From results, it was clear that returns are excellent for a range of parameters that could be expected in practice. Importantly, these good returns are achieved even without incentives related to the emissions control benefits of biomass.

John T. Kelly; George Miller; Mehdi Namazian

2001-07-01T23:59:59.000Z

352

Ranking low cost sorbents for mercury capture from simulated flue gases  

Science Conference Proceedings (OSTI)

Coal fired utility boilers are the largest anthropogenic source of mercury release to the atmosphere, and mercury abatement legislation is already in place in the USA. The present study aimed to rank low cost mercury sorbents (char and activated carbon from the pyrolysis of scrap tire rubber and two coal fly ashes from UK power plants) against Norit Darco HgTM for mercury retention by using a novel bench-scale reactor. In this scheme, a fixed sorbent bed was tested for mercury capture efficiency from a simulated flue gas stream. Experiments with a gas stream of only mercury and nitrogen showed that while the coal ashes were the most effective in mercury capture, char from the pyrolysis of scrap tire rubber was as effective as the commercial sorbent Norit Darco HgTM. Tests conducted at 150{sup o}C, with a simulated flue gas mix that included N{sub 2}, NO, NO{sub 2}, CO{sub 2}, O{sub 2}, SO{sub 2} and HCl, showed that all the sorbents captured approximately 100% of the mercury in the gas stream. The introduction of NO and NO{sub 2} was found to significantly improve the mercury capture, possibly by reactions between NOx and the mercury. Since the sorbents' efficiency decreased with increasing test temperature, physical sorption could be the initial step in the mercury capture process. As the sorbents were only exposed to 64 ng of mercury in the gas stream, the mercury loadings on the samples were significantly less than their equilibrium capacities. The larger capacities of the activated carbons due to their more microporous structure were therefore not utilized. Although the sorbents have been characterized by BET surface area analysis and XRD analysis, further analysis is needed in order to obtain a more conclusive correlation of how the characteristics of the different sorbents correlate with the observed variations in mercury capture ability. 34 refs., 8 figs., 6 tabs.

H. Revata Seneviratne; Cedric Charpenteau; Anthe George; Marcos Millan; Denis R. Dugwell; Rafael Kandiyoti [Imperial College London, London (United Kingdom). Department of Chemical Engineering

2007-12-15T23:59:59.000Z

353

Final Technical Report - Recovery Act: Organic Coatings as Encapsulants for Low Cost, High Performance PV Modules  

DOE Green Energy (OSTI)

The objective of this project was to evaluate the feasibility of utilizing PPG's commercial organic coatings systems as efficient, modernized encapsulants for low cost, high performance, thin film photovoltaic modules. Our hypothesis was that the combination of an anticorrosive coating with a more traditional barrier topcoat would mitigate many electrochemical processes that are now responsible for the significant portion of photovoltaic (PV) failures, thereby nullifying the extremely high moisture barrier requirements of currently used encapsulation technology. Nine commercially available metal primer coatings and six commercially available top coatings were selected for screening. Twenty-one different primer/top coat combinations were evaluated. The primer coatings were shown to be the major contributor to corrosion inhibition, adhesion, and barrier properties. Two primer coatings and one top coating were downselected for testing on specially-fabricated test modules. The coated test modules passed initial current leakage and insulation testing. Damp Heat testing of control modules showed visible corrosion to the bus bar metal, whereas the coated modules showed none. One of the primer/top coat combinations retained solar power performance after Damp Heat testing despite showing some delamination at the EVA/solar cell interface. Thermal Cycling and Humidity Freeze testing resulted in only one test module retaining its power performance. Failure modes depended on the particular primer/top coating combination used. Overall, this study demonstrated that a relatively thin primer/top coating has the potential to replace the potting film and backsheet in crystalline silicon-based photovoltaic modules. Positive signals were received from commercially available coatings developed for applications having performance requirements different from those required for photovoltaic modules. It is likely that future work to redesign and customize these coatings would result in a coating system meeting the requirements for photovoltaic module encapsulation.

Stuart Hellring; Jiping Shao; James Poole

2011-12-05T23:59:59.000Z

354

A Low Cost, High Capacity Regenerable Sorbent for Pre-combustion CO{sub 2} Capture  

SciTech Connect

The overall objective of the proposed research is to develop a low cost, high capacity CO{sub 2} sorbent and demonstrate its technical and economic viability for pre-combustion CO{sub 2} capture. The specific objectives supporting our research plan were to optimize the chemical structure and physical properties of the sorbent, scale-up its production using high throughput manufacturing equipment and bulk raw materials and then evaluate its performance, first in bench-scale experiments and then in slipstream tests using actual coal-derived synthesis gas. One of the objectives of the laboratory-scale evaluations was to demonstrate the life and durability of the sorbent for over 10,000 cycles and to assess the impact of contaminants (such as sulfur) on its performance. In the field tests, our objective was to demonstrate the operation of the sorbent using actual coal-derived synthesis gas streams generated by air-blown and oxygen-blown commercial and pilot-scale coal gasifiers (the CO{sub 2} partial pressure in these gas streams is significantly different, which directly impacts the operating conditions hence the performance of the sorbent). To support the field demonstration work, TDA collaborated with Phillips 66 and Southern Company to carry out two separate field tests using actual coal-derived synthesis gas at the Wabash River IGCC Power Plant in Terre Haute, IN and the National Carbon Capture Center (NCCC) in Wilsonville, AL. In collaboration with the University of California, Irvine (UCI), a detailed engineering and economic analysis for the new CO{sub 2} capture system was also proposed to be carried out using Aspen PlusTM simulation software, and estimate its effect on the plant efficiency.

Alptekin, Gokhan

2012-09-30T23:59:59.000Z

355

DEVELOPMENT OF LOW-COST MANUFACTURING PROCESSES FOR PLANAR, MULTILAYER SOLID OXIDE FUEL CELL ELEMENTS  

DOE Green Energy (OSTI)

This report summarizes the results of a four-year project, entitled, ''Low-Cost Manufacturing Of Multilayer Ceramic Fuel Cells'', jointly funded by the U.S. Department of Energy, the State of Ohio, and by project participants. The project was led by NexTech Materials, Ltd., with subcontracting support provided by University of Missouri-Rolla, Michael A. Cobb & Co., Advanced Materials Technologies, Inc., Edison Materials Technology Center, Gas Technology Institute, Northwestern University, and The Ohio State University. Oak Ridge National Laboratory, though not formally a subcontractor on the program, supported the effort with separate DOE funding. The objective of the program was to develop advanced manufacturing technologies for making solid oxide fuel cell components that are more economical and reliable for a variety of applications. The program was carried out in three phases. In the Phase I effort, several manufacturing approaches were considered and subjected to detailed assessments of manufacturability and development risk. Estimated manufacturing costs for 5-kW stacks were in the range of $139/kW to $179/kW. The risk assessment identified a number of technical issues that would need to be considered during development. Phase II development work focused on development of planar solid oxide fuel cell elements, using a number of ceramic manufacturing methods, including tape casting, colloidal-spray deposition, screen printing, spin-coating, and sintering. Several processes were successfully established for fabrication of anode-supported, thin-film electrolyte cells, with performance levels at or near the state-of-the-art. The work in Phase III involved scale-up of cell manufacturing methods, development of non-destructive evaluation methods, and comprehensive electrical and electrochemical testing of solid oxide fuel cell materials and components.

Scott Swartz; Matthew Seabaugh; William Dawson; Harlan Anderson; Tim Armstrong; Michael Cobb; Kirby Meacham; James Stephan; Russell Bennett; Bob Remick; Chuck Sishtla; Scott Barnett; John Lannutti

2004-06-12T23:59:59.000Z

356

Investigation of low-cost LNG vehicle fuel tank concepts. Final report  

DOE Green Energy (OSTI)

The objective of this study was to investigate development of a low-cost liquid natural gas (LNG) vehicle fuel storage tank with low fuel boil-off, low tank pressure, and high safety margin. One of the largest contributors to the cost of converting a vehicle to LNG is the cost of the LNG fuel tank. To minimize heat leak from the surroundings into the low-temperature fuel, these tanks are designed as cryogenic dewars with double walls separated by an evacuated insulation space containing multi-layer insulation. The cost of these fuel tanks is driven by this double-walled construction, both in terms of materials and labor. The primary focus of the analysis was to try to devise a fuel tank concept that would allow for the elimination of the double-wall requirement. Results of this study have validated the benefit of vacuum/MLI insulation for LNG fuel tanks and the difficulty in identifying viable alternatives. The thickness of a non-vacuum insulation layer would have to be unreasonably large to achieve an acceptable non-venting hold time. Reasonable hold times could be achieved by using an auxiliary tank to accept boil-off vapor from a non-vacuum insulated primary tank, if the vapor in the auxiliary tank can be stored at high pressure. The primary focus of the analysis was to try to devise a fuel tank concept that allowed for the elimination of the double-wall requirement. Thermodynamic relations were developed for analyzing the fuel tank transient response to heat transfer, venting of vapor, and out-flow of either vapor or liquid. One of the major costs associated with conversion of a vehicle to LNG fuel is the cost of the LNG fuel tank. The cost of these tanks is driven by the cryogenic nature of the fuel and by the fundamental design requirements of long non-venting hold times and low storage pressure.

O`Brien, J.E.; Siahpush, A. [Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States). Idaho National Engineering and Environmental Lab.

1998-02-01T23:59:59.000Z

357

A novel low-cost, limited-resource approach to autonomous multi-robot exploration and mapping  

Science Conference Proceedings (OSTI)

Mobile robots are becoming more heavily used in environments where human involvement is limited, impossible, or dangerous. These robots perform some of the more laborious human tasks on Earth and throughout the solar system, simultaneously saving resources ... Keywords: Distributed robots, Low-cost SLAM, Mobile robots, Multi-robot team, Planetary exploration

Christopher M. Gifford; Russell Webb; James Bley; Daniel Leung; Mark Calnon; Joseph Makarewicz; Bryan Banz; Arvin Agah

2010-02-01T23:59:59.000Z

358

Low-cost, highly efficient, and tunable ultrafast laser technology based on directly diode-pumped Cr:Colquiriites  

E-Print Network (OSTI)

This doctoral project aims to develop robust, ultra low-cost ($5,000-20,000), highly-efficient, and tunable femtosecond laser technology based on diode-pumped Cr:Colquiriite gain media (Cr:LiCAF, Cr3+:LiSAF and Cr:LiSGaF). ...

Demirbas, Umit

2010-01-01T23:59:59.000Z

359

A fast-developing and low-cost characterization and test environment for a double axis resonating micromirror  

Science Conference Proceedings (OSTI)

Testing and characterization of micro-electro-mechanical systems (MEMS) and micro-opto-electro-mechanical systems (MOEMS) can be very challenging due to the multi-domain nature of these devices. Nowadays high volume, high-cost, and accurate measuring ... Keywords: Fast-developing, Low-cost characterization, MOEMS, Microelectromechanical systems (MEMS), Micromirror, Testing

Francesco Battini; Emilio Volpi; Eleonora Marchetti; Tommaso Cecchini; Francesco Sechi; Luca Fanucci; Ulrich Hofmann

2010-11-01T23:59:59.000Z

360

Alignment method for parabolic trough solar concentrators  

DOE Patents (OSTI)

A Theoretical Overlay Photographic (TOP) alignment method uses the overlay of a theoretical projected image of a perfectly aligned concentrator on a photographic image of the concentrator to align the mirror facets of a parabolic trough solar concentrator. The alignment method is practical and straightforward, and inherently aligns the mirror facets to the receiver. When integrated with clinometer measurements for which gravity and mechanical drag effects have been accounted for and which are made in a manner and location consistent with the alignment method, all of the mirrors on a common drive can be aligned and optimized for any concentrator orientation.

Diver, Richard B. (Albuquerque, NM)

2010-02-23T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
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361

Numerical Schemes for Rough Parabolic Equations  

SciTech Connect

This paper is devoted to the study of numerical approximation schemes for a class of parabolic equations on (0,1) perturbed by a non-linear rough signal. It is the continuation of Deya (Electron. J. Probab. 16:1489-1518, 2011) and Deya et al. (Probab. Theory Relat. Fields, to appear), where the existence and uniqueness of a solution has been established. The approach combines rough paths methods with standard considerations on discretizing stochastic PDEs. The results apply to a geometric 2-rough path, which covers the case of the multidimensional fractional Brownian motion with Hurst index H>1/3.

Deya, Aurelien, E-mail: deya@iecn.u-nancy.fr [Universite de Nancy 1, Institut Elie Cartan Nancy (France)

2012-04-15T23:59:59.000Z

362

DEGENERATE-PARABOLIC PARTIAL DIFFERENTIAL EQUATIONS WITH UNBOUNDED COEFFICIENTS, MARTINGALE PROBLEMS, AND A  

E-Print Network (OSTI)

DEGENERATE-PARABOLIC PARTIAL DIFFERENTIAL EQUATIONS WITH UNBOUNDED COEFFICIENTS, MARTINGALE four intertwined problems, motivated by mathematical finance, concerning degenerate-parabolic partial differential operators and degenerate diffusion processes. First, we consider a parabolic partial differential

363

Parabolic-Trough Solar Water Heating--FTA, 022798m FTA trough...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Parabolic-Trough Solar Water Heating--FTA, 022798m FTA trough Parabolic-Trough Solar Water Heating--FTA, 022798m FTA trough Federal Technology Alert covers parabolic-trough solar...

364

Low-cost CdZnTe devices for cascade cell application  

DOE Green Energy (OSTI)

This report describes a research program to develop a low-cost technique for producing Cd{sub 1-x}Zn{sub x}Te devices for cascade solar cell applications. The technique involves a two-stage process for fabricating such devices with a band gap of about 1.7 eV and a transparent contact layer of low-resistivity ZnTe. In the first stage, thin films of Cd, Zn, and Te are deposited in stacked layers as Cd{sub 1-x}An{sub x}Te. The second stage involves hearing and reacting the layers to form the compound. At first, electrodeposition was used for depositing the layers to successfully fabricate Dc{sub 1-x}Zn{sub x}Te thin-film devices. These films were also intrinsically doped with copper. For the first time, transparent ZnTe films of low resistivity were obtained in a two-stage process; preliminary solar cells using films with low Zn content were demonstrated. A second phase of the project involved growing films with higher Zn content (>15%). Such films were grown on CdS-coated substrates for fabricating devices. The effects of the solar-cell processing steps on the Cd{sub 1-x}Zn{sub x}Te and CdS/Cd{sub 1-x}Zn{sub x}Te interfaces were studied; results showed that the nature of the interface depended on the stoichiometry of the Cd{sub 1-x}Zn{sub x}Te thin film. A sharp interface was observed for the CdS/CdTe structures, but the interface became highly diffused as the Zn content in the absorber layer increased above 15%. The interaction between the CdS window layer and the Cd{sub 1-x}Zn{sub x}Te absorber layer was found to result from an exchange reaction between Zn in the absorber layer and the thin CdS film. 14 refs., 10 figs.

Basol, B.M.; Kapur, V.K. (International Solar Electric Technology, Inglewood, CA (USA))

1990-11-01T23:59:59.000Z

365

Solar parabolic dish annual technology evaluation report. Fiscal year 1982  

DOE Green Energy (OSTI)

This report summarizes the activities of the JPL Solar Thermal Power Systems Parabolic Dish Project for FY 1982. Included are discussions on designs of module development including their concentrator, receiver, and power conversion subsystems. Analyses and test results, along with progress on field tests, Small Community Experiment System development, and tests at the Parabolic Dish Test Site are also included.

Not Available

1983-09-15T23:59:59.000Z

366

PARABOLIC DELIGNE-LUSZTIG VARIETIES. FRANCOIS DIGNE AND JEAN MICHEL  

E-Print Network (OSTI)

PARABOLIC DELIGNE-LUSZTIG VARIETIES. FRANC¸OIS DIGNE AND JEAN MICHEL Abstract. Motivated by the Brou´e conjecture on blocks with abelian defect groups for finite reductive groups, we study "parabolic of a braid monoid, whose action on their -adic cohomology will conjecturally factor trough a cyclotomic Hecke

367

A new parabolic trough solar collector P. Kohlenbach1  

E-Print Network (OSTI)

) power generation system. The parabolic trough collectors have been installed in the National Solar-selective paint. The absorber operates in a 50mm non-evacuated glass tube to minimize convection losses. Thermal and power generation (CHP), CSIRO has built a solar thermal parabolic trough collector field which

368

An Optical Characterization Technique for Parabolic Trough Solar Collectors Using Images of the Absorber Reection.  

E-Print Network (OSTI)

?? As the concentrating solar power industry competes to develop a less-expensive parabolic trough collector, assurance is needed that new parabolic trough collectors maintain accurate… (more)

Owkes, Jeanmarie Kathleen

2013-01-01T23:59:59.000Z

369

A Low Cost and High Efficient Facility for Removal of $\\SO_{2}$ and $\\NO_{x}$ in the Flue Gas from Coal Fire Power Plant  

E-Print Network (OSTI)

A Low Cost and High Efficient Facility for Removal of $\\SO_{2}$ and $\\NO_{x}$ in the Flue Gas from Coal Fire Power Plant

Pei, Y J; Dong, X; Feng, G Y; Fu, S; Gao, H; Hong, Y; Li, G; Li, Y X; Shang, L; Sheng, L S; Tian, Y C; Wang, X Q; Wang, Y; Wei, W; Zhang, Y W; Zhou, H J

2001-01-01T23:59:59.000Z

370

Development of Low-Cost Manufacturing Processes for Planar, Multilayer Solid Oxide Fuel Cell Elements  

DOE Green Energy (OSTI)

This report summarizes the results of Phase II of this program, 'Low-Cost Manufacturing Of Multilayer Ceramic Fuel Cells'. The objective of the program is to develop advanced ceramic manufacturing technologies for making planar solid oxide fuel cell (SOFC) components that are more economical and reliable for a variety of applications. Phase II development work focused on three distinct manufacturing approaches (or tracks) for planar solid oxide fuel cell elements. Two development tracks, led by NexTech Materials and Oak Ridge National Laboratory, involved co-sintering of planar SOFC elements of cathode-supported and anode-supported variations. A third development track, led by the University of Missouri-Rolla, focused on a revolutionary approach for reducing operating temperature of SOFCs by using spin-coating to deposit ultra-thin, nano-crystalline YSZ electrolyte films. The work in Phase II was supported by characterization work at Ohio State University. The primary technical accomplishments within each of the three development tracks are summarized. Track 1--NexTech's targeted manufacturing process for planar SOFC elements involves tape casting of porous electrode substrates, colloidal-spray deposition of YSZ electrolyte films, co-sintering of bi-layer elements, and screen printing of opposite electrode coatings. The bulk of NexTech's work focused on making cathode-supported elements, although the processes developed at NexTech also were applied to the fabrication of anode-supported cells. Primary accomplishments within this track are summarized below: (1) Scale up of lanthanum strontium manganite (LSM) cathode powder production process; (2) Development and scale-up of tape casting methods for cathode and anode substrates; (3) Development of automated ultrasonic-spray process for depositing YSZ films; (4) Successful co-sintering of flat bi-layer elements (both cathode and anode supported); (5) Development of anode and cathode screen-printing processes; and (6) Demonstration of novel processes for composite cathode and cermet anode materials. Track 2--ORNL's development work focused solely on making anode-supported planar cells by tape casting of a porous anode substrate, screen printing of a YSZ electrolyte film, co-sintering of the bi-layer element, and screen-printing of an opposite cathode coating. Primary accomplishments within this track are summarized below: (1) Development and scale-up of anode tape casting and lamination processes; (2) Development of proprietary ink vehicle for screen-printing processes; (3) Development of screen-printing process for depositing YSZ films; (4) Successful co-sintering of flat bi-layer anode-supported elements; and (5) Development of cathode screen-printing process. Track 3--UMR's process development work involved fabrication of a micro-porous cathode substrate, deposition of a nano-porous interlayer film, deposition of nano-crystalline YSZ electrolyte films from polymeric precursor solutions, and deposition of an anode coating. Primary accomplishments within this track are summarized below: (1) Development and scale up of tape casting and sintering methods for cathode substrates; (2) Deposition of nano-porous ceria interlayer films on cathode substrates; (3) Successful deposition of dense YSZ films on porous cathode substrates; and (4) Identification of several anode material options.

Scott Swartz; Matthew Seabaugh; William Dawson; Tim Armstrong; Harlan Anderson; John Lannutti

2001-09-30T23:59:59.000Z

371

Low-cost flexible packaging for high-power Li-Ion HEV batteries.  

DOE Green Energy (OSTI)

Batteries with various types of chemistries are typically sold in rigid hermetically sealed containers that, at the simplest level, must contain the electrolyte while keeping out the exterior atmosphere. However, such rigid containers can have limitations in packaging situations where the form of the battery is important, such as in hand-held electronics like personal digital assistants (PDAs), laptops, and cell phones. Other limitations exist as well. At least one of the electrode leads must be insulated from the metal can, which necessitates the inclusion of an insulated metal feed-through in the containment hardware. Another limitation may be in hardware and assembly cost, such as exists for the lithium-ion batteries that are being developed for use in electric vehicles (EVs) and hybrid electric vehicles (HEVs). The large size (typically 10-100 Ah) of these batteries usually results in electric beam or laser welding of the metal cap to the metal can. The non-aqueous electrolyte used in these batteries are usually based on flammable solvents and therefore require the incorporation of a safety rupture vent to relieve pressure in the event of overcharging or overheating. Both of these features add cost to the battery. Flexible packaging provides an alternative to the rigid container. A common example of this is the multi-layered laminates used in the food packaging industry, such as for vacuum-sealed coffee bags. However, flexible packaging for batteries does not come without concerns. One of the main concerns is the slow egress of the electrolyte solvent through the face of the inner laminate layer and at the sealant edge. Also, moisture and air could enter from the outside via the same method. These exchanges may be acceptable for brief periods of time, but for the long lifetimes required for batteries in electric/hybrid electric vehicles, batteries in remote locations, and those in satellites, these exchanges are unacceptable. Argonne National Laboratory (ANL), in collaboration with several industrial partners, is working on low-cost flexible packaging as an alternative to the packaging currently being used for lithium-ion batteries [1,2]. This program is funded by the FreedomCAR & Vehicle Technologies Office of the U.S. Department of Energy. (It was originally funded under the Partnership for a New Generation of Vehicles, or PNGV, Program, which had as one of its mandates to develop a power-assist hybrid electric vehicle with triple the fuel economy of a typical sedan.) The goal in this packaging effort is to reduce the cost associated with the packaging of each cell several-fold to less than $1 per cell ({approx} 50 cells are required per battery, 1 battery per vehicle), while maintaining the integrity of the cell contents for a 15-year lifetime. Even though the battery chemistry of main interest is the lithium-ion system, the methodology used to develop the most appropriate laminate structure will be very similar for other battery chemistries.

Jansen, A. N.; Amine, K.; Henriksen, G. L.

2004-06-18T23:59:59.000Z

372

ESS 2012 Peer Review - Low-Cost, High-Performance Hybrid Membranes for Redox Flow Batteries - Hongxing Hu, Amsen Technologies  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DESIGN © 2008 DESIGN © 2008 www.PosterPresentations.com Low-Cost, High-Performance Hybrid Membranes for Redox Flow Batteries Hongxing Hu, Amsen Technologies LLC DOE SBIR Project, Program Manager at DOE: Dr. Imre Gyuk Objectives and Technical Approach Objectives: This SBIR project aims to develop low-cost, high performance hybrid polymeric PEMs for redox flow batteries (RFBs). Such membranes shall have high chemical stability in RFB electrolytes, high proton conductivity, low permeability of vanadium ions, along with high dimensional stability, high mechanical strength and durability, and lower cost than Nafion membranes. Approach: * Hybrid membranes of sulfonated polymers * Balance between different types of polymers for proton conductivity and chemical stability

373

NETL: IEP – Post-Combustion CO2 Emissions Control - A Low-Energy, Low-Cost  

NLE Websites -- All DOE Office Websites (Extended Search)

A Low-Energy, Low-Cost Process for Stripping Carbon Dioxide from Absorbents A Low-Energy, Low-Cost Process for Stripping Carbon Dioxide from Absorbents Project No.: FG02-06ER84592 SBIR Glycol Heater, Stripper, MEA Delivery Tank, CO2 and H2O Collection Apparatus Glycol Heater, Stripper, MEA Delivery Tank, CO2 and H2O Collection Apparatus AIL Research, Inc. (AIL) is in the second phase of a small business initiative research (SBIR) project that is assessing the economic and technical feasibility of a carbon dioxide (CO2) stripper that uses an internally heated contactor. The project will determine whether the construction of the internally heated contactor is compatible with the operating conditions of a monoethanolamine stripper and an advanced scrubber (e.g., one that uses a mixture of potassium carbonate and piperazine) and it will also determine the maintenance procedures required

374

ESS 2012 Peer Review - Low Cost, High Performance and Long Life Flow Battery Electrodes - Tom Stepien, Primus Power  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

With ARPA-E we optimized With ARPA-E we optimized * Adhesion * Current density * Duration * Catalytic coatings * Voltaic performance Goals * Cost-effectiveness * High-efficiency * Uniformity EnergyPod Low Cost, High Performance and Long Life Flow Battery Electrodes TM A Breakthrough In Distributed, Grid Scale Energy Storage ARPA-E has enabled Primus Power to create an innovative and technically advanced electrode Electrode Zinc Plating This, combined with our other advances has enabled us to create a unique flow battery system with ...  Low cost electrodes  Long life  High efficiency  Flexibility For...  Ubiquitous  Dispatchable  Cost effective ... grid-scale electrical energy storage to: * Accelerate renewable

375

DOE Hydrogen and Fuel Cells Program Record 12024: Hydrogen Production Cost Using Low-Cost Natural Gas  

NLE Websites -- All DOE Office Websites (Extended Search)

2024 Date: September 19, 2012 2024 Date: September 19, 2012 Title: Hydrogen Production Cost Using Low-Cost Natural Gas Originator: Sara Dillich, Todd Ramsden & Marc Melaina Approved by: Sunita Satyapal Date: September 24, 2012 Item: Hydrogen produced and dispensed in distributed facilities at high-volume refueling stations using current technology and DOE's Annual Energy Outlook (AEO) 2009 projected prices for industrial natural gas result in a hydrogen levelized cost of $4.49 per gallon-gasoline-equivalent (gge) (untaxed) including compression, storage and dispensing costs. The hydrogen production portion of this cost is $2.03/gge. In comparison, current analyses using low-cost natural gas with a price of $2.00 per MMBtu can decrease the hydrogen levelized cost to $3.68 per gge (untaxed) including

376

Air-Microfluidics: Towards Lab-on-a-Chip Systems for Low-Cost Air-Quality  

NLE Websites -- All DOE Office Websites (Extended Search)

Air-Microfluidics: Towards Lab-on-a-Chip Systems for Low-Cost Air-Quality Air-Microfluidics: Towards Lab-on-a-Chip Systems for Low-Cost Air-Quality Monitoring Speaker(s): Igor Paprotny Date: November 12, 2013 - 12:00pm - 1:00pm Location: 90-3122 Seminar Host/Point of Contact: Lara Gundel Air-microfluidic devices that monitor particles suspended in air, as opposed to liquids, can dramatically reduce the size and cost of future air-quality sensors. The use of microelectromechanical systems (MEMS) technologies and wafer-scale integration permits the inclusion of many different sensors onto a small footprint. Benefits of air-microfluidics are many. For example, air-microfluidic lab-on-a-chip devices can be used as portable sensors for tracking individual exposure to airborne pollutants. Such sensors will enable linking exposure and biometric information to

377

ESS 2012 Peer Review - Low Cost and Highly Selective Composite Membrane for Redox Flow Batteries - Fei Wang, EIC Laboratories  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Low Cost and Highly Selective Composite Membrane for Redox Flow Batteries Low Cost and Highly Selective Composite Membrane for Redox Flow Batteries Fei Wang, Dharmasena Peramunage, James M. Sylvia, and Monsy M. Jocob EIC Laboratories, Inc. 111 Downey Street, Norwood, MA 02062. www.eiclabs.com Identification of the Problem and Technical Approach Redox flow batteries (RFB) hold great promise for large scale electrochemical energy storage. A critical component of RFB is the membrane which separates anode and cathode compartments. The current state-of-the-art membrane, NAFION is too expensive, lacks selectivity, permitting leakage between anode and cathode electrolyte compartments. EIC is developing a novel bilayer, interpenetrating network membrane. Thin Nafion layer for anode side protection providing oxidative stability. The bulk part of the membrane consists of a block

378

Cost-Effective Cable Insulation: Nanoclay Reinforced Ethylene-Propylene-Rubber for Low-Cost HVDC Cabling  

SciTech Connect

GENI Project: GE is developing new, low-cost insulation for high-voltage direct current (HVDC) electricity transmission cables. The current material used to insulate HVDC transmission cables is very expensive and can account for as much as 1/3 of the total cost of a high-voltage transmission system. GE is embedding nanomaterials into specialty rubber to create its insulation. Not only are these materials less expensive than those used in conventional HVDC insulation, but also they will help suppress excess charge accumulation. The excess charge left behind on a cable poses a major challenge for high-voltage insulation—if it’s not kept to a low level, it could ultimately lead the insulation to fail. GE’s low-cost insulation is compatible with existing U.S. cable manufacturing processes, further enhancing its cost effectiveness.

None

2012-02-24T23:59:59.000Z

379

Testing the normality of the gravitational wave data with a low cost recursive estimate of the kurtosis  

E-Print Network (OSTI)

We propose a monitoring indicator of the normality of the output of a gravitational wave detector. This indicator is based on the estimation of the kurtosis (i.e., the 4th order statistical moment normalized by the variance squared) of the data selected in a time sliding window. We show how a low cost (because recursive) implementation of such estimation is possible and we illustrate the validity of the presented approach with a few examples using simulated random noises.

E. Chassande-Mottin

2002-12-02T23:59:59.000Z

380

Parabolic refined invariants and Macdonald polynomials  

E-Print Network (OSTI)

A string theoretic derivation is given for the conjecture of Hausel, Letellier, and Rodriguez-Villegas on the cohomology of character varieties with marked points. Their formula is identified with a refined BPS expansion in the stable pair theory of a local root stack, generalizing previous work of the first two authors in collaboration with G. Pan. Haiman's geometric construction for Macdonald polynomials is shown to emerge naturally in this context via geometric engineering. In particular this yields a new conjectural relation between Macdonald polynomials and refined local orbifold curve counting invariants. The string theoretic approach also leads to a new spectral cover construction for parabolic Higgs bundles in terms of holomorphic symplectic orbifolds.

Wu-yen Chuang; Duiliu-Emanuel Diaconescu; Ron Donagi; Tony Pantev

2013-11-14T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Steam generation in compound parabolic concentrator collectors  

SciTech Connect

This report describes the advantages of generating steam directly in a nonimaging compound parabolic concentrator (CPC) collector rather than using a heat-transfer fluid and a secondary heat exchanger. The predicted performance advantages from generating steam directly in CPC collectors are significant, and that performance has ben verified using a collector built and tested at Argonne National Laboratory. The collector and the method used to test its operation in a steam-generating mode are described. Test results are included for a 6.4-m/sup 2/ array of evacuated tube collectors with an advanced absorber coating, silver reflectors, and tubes oriented in a north-south configuration. Also described are the test methods and results for indoor testing for heat loss by the collectors and outdoor testing of their instantaneous optical efficiency.

Allen, J.W.; Schertz, W.W.; Wantroba, A.S.

1985-08-01T23:59:59.000Z

382

The development of low cost LiFePO4-based high power lithium-ion batteries  

NLE Websites -- All DOE Office Websites (Extended Search)

development of low cost LiFePO4-based high power lithium-ion batteries development of low cost LiFePO4-based high power lithium-ion batteries Title The development of low cost LiFePO4-based high power lithium-ion batteries Publication Type Journal Article Year of Publication 2005 Authors Striebel, Kathryn A., Joongpyo Shim, Azucena Sierra, Hui Yang, Xiangyun Song, Robert Kostecki, and Kathryn N. McCarthy Journal Journal of Power Sources Volume 146 Pagination 33-38 Keywords libob, lifepo4, lithium-ion, post-test, raman spectroscopy Abstract Pouch type LiFePO4-natural graphite lithium-ion cells were cycled at constant current with periodic pulse-power testing in several different configurations. Components were analyzed after cycling with electrochemical, Raman and TEM techniques to determine capacity fade mechanisms. The cells with carbon-coated current collectors in the cathode and LiBOB-salt electrolyte showed the best performance stability. In many cases, iron species were detected on the anodes removed from cells with both TEM and Raman spectroscopy. The LiFePO4 electrodes showed unchanged capacity suggesting that the iron is migrating in small quantities and is acting as a catalyst to destabilize the anode SEI in these cells.

383

NREL: TroughNet - Parabolic Trough Technology Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

Technology Overview Technology Overview Parabolic trough solar power technology offers an environmentally sound and increasingly cost-effective energy source. Here you'll find overviews about the following parabolic trough power plant technologies: Solar Field Collector balance of system Concentrator structure Mirrors Receivers Thermal Energy Storage Molten-salt heat transfer fluid Storage media Storage systems Power Plant Systems Direct steam generation Fossil-fired hybrid backup Power cycles Wet and dry cooling Operation and maintenance For more detailed, technical information, see our publications on parabolic trough power plant technology. Printable Version TroughNet Home Technologies Solar Field Thermal Energy Storage Power Plant Systems Market & Economic Assessment Research & Development

384

Solar thermal parabolic dish systems: technology and applications  

DOE Green Energy (OSTI)

This presentation surveys the status and some probable future courses of development of parabolic dish solar collector technology and some of the near-term and long-range applications of the technology. Included are fundamentals of the technology, descriptions of current collectors with particular emphasis on the types developed within the Department of Energy's Solar Thermal Program, descriptions of current systems and applications, key technical issues and tradeoff considerations which will affect the competition between parabolic dish systems and other solar thermal technologies, and, finally, a discussion of future possibilities for the development of parabolic dish technology.

Leonard, J.A.

1984-05-01T23:59:59.000Z

385

NREL: TroughNet - Parabolic Trough System and Component Testing  

NLE Websites -- All DOE Office Websites (Extended Search)

System and Component Testing System and Component Testing Here you'll find information about parabolic trough system and components testing, as well facilities and laboratories used for testing. Tests include those for: Concentrator thermal efficiency Receiver thermal performance Mirror contour and collector alignment Mirror reflectivity and durability Some of the following documents are available as Adobe Acrobat PDFs. Download Adobe Reader. Concentrator Thermal Efficiency Testing Researchers and industry use the following facilities for testing parabolic trough collectors. AZTRAK Rotating Platform At Sandia National Laboratories' National Solar Thermal Test Facility (NSTTF), the AZTRAK rotating platform has been used to test several parabolic trough modules and receivers. Initially, researchers tested a

386

Self-similar parabolic plasmonic beams Arthur R. Davoyan,1,2,  

E-Print Network (OSTI)

Self-similar parabolic plasmonic beams Arthur R. Davoyan,1,2, * Sergei K. Turitsyn,3 and Yuri S support stable self-similar plasmonic waves with a parabolic profile. Simplicity of a parabolic shape on availability of the basic waveforms with simple shapes, e.g., square top- flat, triangular, parabolic, and so

Turitsyn, Sergei K.

387

NREL: TroughNet - 2007 Parabolic Trough Technology Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

2007 Parabolic Trough Technology Workshop 2007 Parabolic Trough Technology Workshop NREL hosted a parabolic trough technology workshop on March 8-9, 2007, in Golden, Colorado. It had three goals: Exchanging technical information Collaborating on SolarPaces projects: receiver testing and dry cooling Gathering industry input on laboratory R&D directions. The workshop featured presentations on the following parabolic trough power plant topics: Current and future market vision Project developments Solar resource assessment Technology trends Molten-salt heat transfer fluids Direct steam generation Advanced tools and testing capabilities Researchers also presented a poster session on laboratory capabilities. Note: if a presentation or poster isn't listed below, NREL hasn't yet received permission or approval to post it.

388

Parabolic-Trough Technology Roadmap | Open Energy Information  

Open Energy Info (EERE)

Parabolic-Trough Technology Roadmap Parabolic-Trough Technology Roadmap Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Parabolic-Trough Technology Roadmap Agency/Company /Organization: National Renewable Energy Laboratory, United States Department of Energy Sector: Energy Focus Area: Renewable Energy, Solar Topics: Technology characterizations Resource Type: Guide/manual Website: www.nrel.gov/csp/troughnet/pdfs/24748.pdf References: Parabolic-Trough Technology Roadmap[1] Overview "The working group reviewed the status of today's trough technologies, evaluated existing markets, identified potential future market opportunities, and developed a roadmap toward its vision of the industry's potential-including critical advancements needed over the long term to significantly reduce costs while further increasing

389

NREL: TroughNet - Parabolic Trough Thermal Energy Storage Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Thermal Energy Storage Technology One advantage of parabolic trough power plants is their potential for storing solar thermal energy to use during non-solar periods and to dispatch...

390

Shock stability analysis for Parabolized Navier-Stokes equations  

Science Conference Proceedings (OSTI)

Parabolized Navier-Stokes (PNS) techniques have been receiving increasing attention as an effective method for treating two and three dimensional high-speed gas flows. Since the method involves marching in a ''time like'' coordinate the problem size ...

Douglas D. Cline; Graham F. Carey

1988-12-01T23:59:59.000Z

391

Parabolic Equations and Markov Processes Over p-adic Fields  

E-Print Network (OSTI)

We construct and study a fundamental solution of Cauchy's problem for p-adic parabolic equations of a certain the type. The fundamental solution is the transition density of a p-adic Markov process.

W. A. Zuniga-Galindo

2006-12-11T23:59:59.000Z

392

Application of the Piecewise Parabolic Method (PPM) to Meteorological Modeling  

Science Conference Proceedings (OSTI)

The Piecewise Parabolic Method (PPM), a numerical technique developed in astrophysics for modeling fluid flows with strong shocks and discontinuities is adapted for treating sharp gradients in small-scale meteorological flows. PPM differs ...

Richard L. Carpenter Jr.; Kelvin K. Droegemeier; Paul R. Woodward; Carl E. Hane

1990-03-01T23:59:59.000Z

393

CLASSICAL TWO-PARABOLIC T-SCHOTTKY GROUPS  

E-Print Network (OSTI)

A T-Schottky group is a discrete group of Möbius transformations whose generators identify pairs of possibly-tangent Jordan curves on the complex sphere ? ?. If the curves are Euclidean circles, then the group is termed classical T-Schottky. We describe the boundary of the space of classical T-Schottky groups affording two parabolic generators within the larger parameter space of all-Schottky groups with two parabolic generators. This boundary is surprisingly different from that of the larger space. It is analytic, while the boundary of the larger space appears to be fractal. Approaching the boundary of the smaller space does not correspond to pinching; circles necessarily become tangent, but extra parabolics need not develop. As an application, we construct an explicit one parameter family of two parabolic generator non-classical T-Schottky groups.

Jane Gilman; Peter Waterman

2006-01-01T23:59:59.000Z

394

Guidelines for reporting parabolic trough solar electric system performance  

DOE Green Energy (OSTI)

The purpose of this activity is to develop a generic methodology which can be used to track and compare the performance of parabolic trough power plants. The approach needs to be general enough to work for all existing and future parabolic trough plant designs, provide meaningful comparisons of year to year performance, and allow for comparisons between dissimilar plant designs. The approach presented here uses the net annual system efficiency as the primary metric for evaluating the performance of parabolic trough power plants. However, given the complex nature of large parabolic trough plants, the net annual system efficiency by itself does not adequately characterize the performance of the plant. The approach taken here is to define a number of additional performance metrics which enable a more comprehensive understanding of overall plant performance.

Price, H.W.

1997-06-01T23:59:59.000Z

395

Solar parabolic dish technology annual evaluation report. Fiscal year 1983  

DOE Green Energy (OSTI)

This report summarizes the activities of the JPL Solar Thermal Power Systems Parabolic Dish Project for FY 1983. Included are discussions on designs of module development including their concentrator, receiver, and power conversion subsystem together with a separate discussion of concentrator development. Analyses and test results, along with progress on field tests, Small Community Experiment system development, and tests at the Parabolic Dish Test Site are also included.

Not Available

1984-04-15T23:59:59.000Z

396

The development of low cost LiFePO4-based high power lithium-ion batteries  

DOE Green Energy (OSTI)

The cycling performance of low-cost LiFePO4-based high-power lithium-ion cells was investigated and the components were analyzed after cycling to determine capacity fade mechanisms. Pouch type LiFePO4/natural graphite cells were assembled and evaluated by constant C/2 cycling, pulse-power and impedance measurements. From post-test electrochemical analysis after cycling, active materials, LiFePO4 and natural graphite, showed no degradation structurally or electrochemically. The main reasons for the capacity fade of cell were lithium inventory loss by side reaction and possible lithium deposition on the anode.

Shim, Joongpyo; Sierra, Azucena; Striebel, Kathryn A.

2003-11-25T23:59:59.000Z

397

The use of electrochemical sensors for monitoring urban air quality in low-cost, high-density networks.  

E-Print Network (OSTI)

electrolyte reservoirs for increased long-term baseline stability, and larger integral batteries allowing operation for in excess of 3 months without intervention. In this case sensors were sealed with rubber O-rings on the bottom of the enclosure behind a... The use of electrochemical sensors for monitoring urban air quality in low-cost, high-density networks. M. I. Mead1*, O.A.M. Popoola1, G. B. Stewart1, P. Landshoff3, M. Calleja2, M. Hayes2, J. J. Baldovi1, T. F. Hodgson1, M. W. McLeod1, J. Dicks4...

Mead, M I; Popoola, O A M; Stewart, G B; Landshoff, P; Calleja, M; Hayes, M; Baldovi, J J; Hodgson, T F; McLeod, M W; Dicks, J; Lewis, A; Cohen, J; Baron, R; Saffell, J R; Jones, R L

398

Parabolic Whittaker Functions and Topological Field Theories I  

E-Print Network (OSTI)

First, we define a generalization of the standard quantum Toda chain inspired by a construction of quantum cohomology of partial flags spaces GL(\\ell+1)/P, P a parabolic subgroup. Common eigenfunctions of the parabolic quantum Toda chains are generalized Whittaker functions given by matrix elements of infinite-dimensional representations of gl(\\ell+1). For maximal parabolic subgroups (i.e. for P such that GL(\\ell+1)/P=\\mathbb{P}^{\\ell}) we construct two different representations of the corresponding parabolic Whittaker functions as correlation functions in topological quantum field theories on a two-dimensional disk. In one case the parabolic Whittaker function is given by a correlation function in a type A equivariant topological sigma model with the target space \\mathbb{P}^{\\ell}. In the other case the same Whittaker function appears as a correlation function in a type B equivariant topological Landau-Ginzburg model related with the type A model by mirror symmetry. This note is a continuation of our project of establishing a relation between two-dimensional topological field theories (and more generally topological string theories) and Archimedean (\\infty-adic) geometry. From this perspective the existence of two, mirror dual, topological field theory representations of the parabolic Whittaker functions provide a quantum field theory realization of the local Archimedean Langlands duality for Whittaker functions. The established relation between the Archimedean Langlands duality and mirror symmetry in two-dimensional topological quantum field theories should be considered as a main result of this note.

Anton Gerasimov; Dimitri Lebedev; Sergey Oblezin

2010-02-12T23:59:59.000Z

399

Solargenix Energy Advanced Parabolic Trough Development  

SciTech Connect

The Solargenix Advanced Trough Development Project was initiated in the Year 2000 with the support of the DOE CSP Program and, more recently, with the added support of the Nevada Southwest Energy Partnership. Parabolic trough plants are the most mature solar power technology, but no large-scale plants have been built in over a decade. Given this lengthy lull in deployment, our first Project objective was development of improved trough technology for near-term deployment, closely patterned after the best of the prior-generation troughs. The second objective is to develop further improvements in next-generation trough technology that will lead to even larger reductions in the cost of the delivered energy. To date, this Project has successfully developed an advanced trough, which is being deployed on a 1-MW plant in Arizona and will soon be deployed in a 64-MW plant in Nevada. This advanced trough offers a 10% increase in performance and over an 20% decrease in cost, relative to prior-generation troughs.

Gee, R. C.; Hale, M. J.

2005-11-01T23:59:59.000Z

400

Parabolic Trough Receiver Heat Loss Testing (Poster)  

DOE Green Energy (OSTI)

Parabolic trough receivers, or heat collection elements (HCEs), absorb sunlight focused by the mirrors and transfer that thermal energy to a fluid flowing within them. Thje absorbing tube of these receivers typically operates around 400 C (752 F). HCE manufacturers prevent thermal loss from the absorbing tube to the environment by using sputtered selective Cermet coatings on the absorber and by surrounding the absorber with a glass-enclosed evacuated annulus. This work quantifies the heat loss of the Solel UVAC2 and Schott PTR70 HCEs. At 400 C, the HCEs perform similarly, losing about 400 W/m of HCE length. To put this in perspective, the incident beam radiation on a 5 m mirror aperture is about 4500 W/m, with about 75% of that energy ({approx} 3400 W/m) reaching the absorber surface. Of the 3400 W/m on the absorber, about 3000 W/m is absorbed into the working fluid while 400 W/m is lost to the environment.

Price, H.; Netter, J.; Bingham, C.; Kutscher, C.; Burkholder, F.; Brandemuehl, M.

2007-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Design and engineering of low-cost centimeter-scale repeatable and accurate kinematic fixtures for nanomanufacturing equipment using magnetic preload and potting  

E-Print Network (OSTI)

This paper introduces a low-cost, centimeter-scale kinematic coupling fixture for use in nanomanufacturing equipment. The fixture uses magnetic circuit design techniques to optimize the magnetic preload required to achieve ...

Watral, Adrienne

2011-01-01T23:59:59.000Z

402

ESS 2012 Peer Review - Redox Flow Battery (RFB) with Low-cost Electrolyte and Membrane Technologies - Thomas Kodenkandath, ITN Energy Systems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Innovative, high energy density Mn-V based RFB electrolytes as a Innovative, high energy density Mn-V based RFB electrolytes as a low-cost alternate to all-Vanadium systems * Low-cost membrane technology, based on renewable biopolymer Chitosan with improved proton conduction & chemical stability, adaptable to Mn-V system * Scale-up of electrolyte and membrane technologies in pursuit of ARPA-E's goal for a 2.5kW/10kWh RFB stack with integrated BoS at a total cost of ~$1000/unit and ~1.2 m 3 footprint ITN Energy Systems, Inc., Littleton, CO 2.5kW/10kWh Redox Flow Battery (RFB) with Low-cost Electrolyte and Membrane Technologies $2.1 M, 33-month program awarded by ARPA-E Sept 7, 2012 Dr. Thomas Kodenkandath High-Performance, Low-cost RFB through Electrolyte & Membrane Innovations Technology Summary

403

Finished Prokaryotic Genome Assemblies from a Low-cost Combination of Short and Long Reads (Seventh Annual Sequencing, Finishing, Analysis in the Future (SFAF) Meeting 2012)  

Science Conference Proceedings (OSTI)

Shuangye Yin on "Finished prokaryotic genome assemblies from a low-cost combination of short and long reads" at the 2012 Sequencing, Finishing, Analysis in the Future Meeting held June 5-7, 2012 in Santa Fe, New Mexico.

Yin, Shuangye (Broad Institute)

2012-06-01T23:59:59.000Z

404

Low-Cost Nano-Patterning Process Makes Millions of Holes in Silver Film, Boosting Light-Capturing Qualities of Solar Cells (Fact Sheet)  

DOE Green Energy (OSTI)

NREL researchers have demonstrated a simple, low-cost way to pattern nano-sized holes in thin silver films in order to trap light waves and boost the transmission of photons into usable energy.

Not Available

2011-02-01T23:59:59.000Z

405

Establishment of the feasibility of a process capable of low cost, high volume production of silane, SiH/sub 4/. Low cost silicon solar array project, Task I. Quarterly progress report, July 1976--October 1976  

DOE Green Energy (OSTI)

The study of a process for the low cost production of silane included laboratory investigations of the kinetics of the redistribution of dichlorosilane and trichlorosilane vapor over a tertiary amine ion exchange resin catalyst. The hydrogenation of SiCl/sub 4/ to form HSiCl/sub 3/ and the direct synthesis of H/sub 2/SiCl/sub 2/ from HCl gas and metallurigical silicon metal were also studied. The purification of SiH/sub 4/ using activated carbon adsorbent was studied along with a process for storing SiH/sub 4/ adsorbed on carbon. The latter makes possible a higher volumetric efficiency than the current practice of compressed gas storage. The mini-plant designed to produce ten pounds per day of SiH/sub 4/ is nearly complete, a detailed description of the unit and its essential design features are given.

Breneman, W.C.; Mui, J.Y.P.

1976-10-15T23:59:59.000Z

406

Does the fully parabolic quasilinear 1D Keller-Segel system enjoy long-time asymptotics analogous to its parabolic-elliptic simplification?  

E-Print Network (OSTI)

We show that the one-dimensional fully parabolic Keller-Segel system with nonlinear diffusion possesses global-in-time solutions, provided the nonlinear diffusion is equal to (1+u)^{-\\alpha}, for \\alpha parabolic-elliptic case to the fully parabolic one. However, in the parabolic-elliptic case the above mentioned integrability condition on nonlinear diffusion sharply distinguishes between global existence and blowup cases. We are unable to recover the entire global existence counterpart of this result in a fully parabolic case.

Jan Burczak; Tomasz Cie?lak; Cristian Morales-Rodrigo

2011-11-07T23:59:59.000Z

407

ESS 2012 Peer Review - Iron Based Flow Batteries for Low Cost Grid Level Energy Storage - Jesse Wainright, Case Western Reserve  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

authors gratefully acknowledge the support of the Department of Energy/Office of Electricity's Energy Storage Program. authors gratefully acknowledge the support of the Department of Energy/Office of Electricity's Energy Storage Program. Iron Based Flow Batteries for Low Cost Grid Level Energy Storage J.S. Wainright, R. F. Savinell, P.I.s Dept. of Chemical Engineering, Case Western Reserve University Purpose Impact on Iron Based Batteries on the DOE OE Energy Storage Mission Recent Results Recent Results Develop efficient, cost-effective grid level storage capability based on iron. Goals of this Effort: * Minimize Cost/Watt by increasing current density - Hardware Cost >> Electrolyte Cost * Minimize Cost/Whr by increasing plating capacity * Maximize Efficiency by minimizing current lost to hydrogen evolution Electrochemistry of the all-Iron system:

408

Development of standardized, low-cost AC PV systems. Phase I annual report, 7 September 1995--7 November 1996  

DOE Green Energy (OSTI)

The objectives of this two-year program are to improve the reliability and safety and reduce the cost of installed grid-connected PV systems by creating standardized, pre-engineered components and an enhanced, low-cost, 250-Watt micro inverter. These advances will be combined with the new, large area Solarex MSX-240 PV module resulting in standard, modular AC PV {open_quotes}building blocks{close_quotes} used to create utility-interactive PV systems as small as one module to many thousands of modules to suit virtually any application. AC PV building blocks will be developed to meet the requirements of the U.S., Japanese and European markets.

Strong, S.J.; Wohlgemuth, J.H.; Kaelin, M.

1997-06-01T23:59:59.000Z

409

Low cost sprayed CdTe solar cell research. First quarterly progress report, 15 August-14 November 1979  

DOE Green Energy (OSTI)

During the first quarter of this contract, facilities for the spray pyrolysis deposition of CdTe thin films using a process anolagous to that used to spray deposit device-quality films of CdS were prepared. A Te salt, ..beta..-(CH/sub 3/)/sub 2/TeI/sub 2/, suitable for use in the spray process was synthesized. The facilities were shown to function properly by the successful spraying of good quality CdS thin films. A number of initial spray experiments were conducted utilizing the ..beta..-(CH/sub 3/)/sub 2/TeI/sub 2/ and other inorganic tellurium-bearing compounds which also show great promise in producing low-cost sprayed CdTe solar cells. Initial chemical tests of these films indicated the presence of both Cd and Te, and x-ray diffraction analysis is presently underway to determine the actual concentration of CdTe.

Sienkiewicz, P.; Lis, S.; Serreze, H.B.; Entine, G.

1979-12-01T23:59:59.000Z

410

4th Responsive Space Conference RS4-2006-3003 Low-Cost Responsive Exploitation of Space by  

E-Print Network (OSTI)

This paper addresses advantages and educational values of ultra-small satellite development. In particular, the space-based techniques in designing and manufacturing the HAUSAT (Hankuk Aviation University SATellite) ultra-small satellite series, being developed by SSRL (Space System Research Lab.) of Hankuk Aviation University, are highlighted. These ultra-small satellites can be utilized as a space technology test bed. HAUSAT-2 is intended to be a verification platform for the Korea’s first spaceborne star tracker and a GPS receiver. New technologies for ultra-small satellites, such as solar cell laydown, plug-andplay type Bus Electronics Unit (BEU), attitude control method, and energy balance analysis of body-mounted solar panels, were implemented on HAUSAT-1 and 2. Engineering skills and technologies obtained by the process of programs such as these will be an enabler for the ‘responsive space ’ that will leverage the low cost, high efficiency ultra-small satellites. 1

Hausat- Nano Satellite; Young-keun Chang; Suk-jin Kang; Byoung-young Moon; Byung-hun Lee; Byung-hun Lee

2006-01-01T23:59:59.000Z

411

Research and development of low cost processes for integrated solar arrays. Final report, April 15, 1974--January 14, 1976  

DOE Green Energy (OSTI)

Results of a program to study process routes leading to a low cost large area integrated silicon solar array manufacture for terrestrial applications are reported. Potential processes for the production of solar-grade silicon are evaluated from thermodynamic, economic, and technical feasibility points of view. Upgrading of the present arc-furnace process is found most favorable. Experimental studies of the Si/SiF/sub 4/ transport and purification process show considerable impurity removal and reasonable transport rates. Silicon deformation experiments indicate production of silicon sheet by rolling at 1350/sup 0/C is feasible. Significant recrystallization by strain-anneal technique has been observed. Experimental recrystallization studies using an electron beam line source are discussed. A maximum recrystallization velocity of approximately 9 m/hr is calculated for silicon sheet. A comparative process rating technique based on detailed cost analysis is presented.

Graham, C.D.; Kulkarni, S.; Louis, E.

1976-05-01T23:59:59.000Z

412

Modelling, simulation and analysis of low-cost direct torque control of PMSM using hall-effect sensors  

E-Print Network (OSTI)

This thesis focuses on the development of a novel Direct Torque Control (DTC) scheme for permanent magnet (PM) synchronous motors (surface and interior types) in the constant torque region with the help of cost-effective hall-effect sensors. This method requires no DC-link sensing, which is a mandatory matter in the conventional DTC drives, therefore it reduces the cost of a conventional DTC of a permanent magnet (PM) synchronous motor and also removes common problems including; resistance change effect, low speed and integration drift. Conventional DTC drives require at least one DC-link voltage sensor (or two on the motor terminals) and two current sensors because of the necessary estimation of position, speed, torque, and stator flux in the stationary reference frame. Unlike the conventional DTC drive, the proposed method uses the rotor reference frame because the rotor position is provided by the three hall-effect sensors and does not require expensive voltage sensors. Moreover, the proposed algorithm takes the acceleration and deceleration of the motor and torque disturbances into account to improve the speed and torque responses. The basic theory of operation for the proposed topology is presented. A mathematical model for the proposed DTC of the PMSM topology is developed. A simulation program written in MATLAB/SIMULINK�® is used to verify the basic operation (performance) of the proposed topology. The mathematical model is capable of simulating the steady-state, as well as dynamic response even under heavy load conditions (e.g. transient load torque at ramp up). It is believed that the proposed system offers a reliable and low-cost solution for the emerging market of DTC for PMSM drives. Finally the proposed drive, considering the constant torque region operation, is applied to the agitation part of a laundry washing machine (operating in constant torque region) for speed performance comparison with the current low-cost agitation cycle speed control technique used by washing machine companies around the world.

Ozturk, Salih Baris

2005-12-01T23:59:59.000Z

413

Flue-gas carbon capture on carbonaceous sorbents: Toward a low-cost multifunctional Carbon Filter for 'Green' energy producers  

SciTech Connect

A low-pressure Carbon Filter Process (patent pending) is proposed to capture carbon dioxide (CO{sub 2}) from flue gas. This filter is filled with a low-cost carbonaceous sorbent, such as activated carbon or charcoal, which has a high affinity (and, hence, high capacity) to CO{sub 2} but not to nitrogen (N{sub 2}). This, in turn, leads to a high CO{sub 2}/N{sub 2} selectivity, especially at low pressures. The Carbon Filter Process proposed in this work can recover at least 90% of flue-gas CO{sub 2} of 90%+ purity at a fraction of the cost normally associated with the conventional amine absorption process. The Carbon Filter Process requires neither expensive materials nor flue-gas compression or refrigeration, and it is easy to heat integrate with an existing or grassroots power plant without affecting the cost of the produced electricity too much. An abundant supply of low-cost CO{sub 2} from electricity producers is good news for enhanced oil recovery (EOR) and enhanced coal-bed methane recovery (ECBMR) operators, because it will lead to higher oil and gas recovery rates in an environmentally sensitive manner. A CO{sub 2}-rich mixture that contains some nitrogen is much less expensive to separate from flue-gas than pure CO{sub 2}; therefore, mixed CO{sub 2}/N{sub 2}-EOR and CO{sub 2}/N{sub 2}-ECBMR methods are proposed to maximize the overall carbon capture and utilization efficiency.

Radosz, M.; Hu, X.D.; Krutkramelis, K.; Shen, Y.Q. [University of Wyoming, Laramie, WY (United States)

2008-05-15T23:59:59.000Z

414

Mean wind forces on parabolic-trough solar collectors  

DOE Green Energy (OSTI)

The purpose of this study was to investigate characteristics of mean wind loads produced by airflow in and around several configurations of parabolic trough solar collectors with and without a wind fence. Four basic parabolic shapes were investigated as single units and one shape was studied as part of several array fields. One 1:25 scale model of each parabolic shape was constructed for mounting on a force balance to measure two forces and three moments. The effects of several dominant variables were investigated in this study: wind-azimuth (or yaw), trough elevation (or pitch) angle, array field configuration, and protective wind fence characteristics. All measurements were made in a boundary-layer flow developed by the meteorological wind tunnel at the Fluid Dynamics and Diffusion Laboratory of Colorado State University. Results are presented and discussed. (WHK)

Peterka, J.A.; Sinau, J.M.; Cermak, J.E.

1980-05-01T23:59:59.000Z

415

Interpretation of parabolic arcs in pulsar secondary spectra  

E-Print Network (OSTI)

Pulsar dynamic spectra sometimes show organised interference patterns; these patterns have been shown to have power spectra which often take the form of parabolic arcs, or sequences of inverted parabolic arclets whose apexes themselves follow a parabolic locus. Here we consider the interpretation of these arc and arclet features. We give a statistical formulation for the appearance of the power spectra, based on the stationary phase approximation to the Fresnel-Kirchoff integral. We present a simple analytic result for the power-spectrum expected in the case of highly elongated images, and a single-integral analytic formulation appropriate to the case of axisymmetric images. Our results are illustrated in both the ensemble-average and snapshot regimes. Highly anisotropic scattering appears to be an important ingredient in the formation of the observed arclets.

Mark Walker; Don Melrose; Dan Stinebring; Chengmin Zhang

2004-03-25T23:59:59.000Z

416

The first Chern form on moduli of parabolic bundles  

E-Print Network (OSTI)

For moduli space of stable parabolic bundles on a compact Riemann surface, we derive an explicit formula for the curvature of its canonical line bundle with respect to Quillen's metric and interpret it as a local index theorem for the family of dbar-operators in associated parabolic endomorphism bundles. The formula consists of two terms: one standard (proportional to the canonical Kaehler form on the moduli space), and one nonstandard, called a cuspidal defect, that is defined by means of special values of the Eisenstein-Maass series. The cuspidal defect is explicitly expressed through curvature forms of certain natural line bundles on the moduli space related to the parabolic structure. We also compare our result with Witten's volume computation.

Leon A. Takhtajan; Peter G. Zograf

2006-09-26T23:59:59.000Z

417

Universal estimate of the gradient for parabolic equations  

E-Print Network (OSTI)

We suggest a modification of the estimate for weighted Sobolev norms of solutions of parabolic equations such that the matrix of the higher order coefficients is included into the weight for the gradient. More precisely, we found the upper limit estimate that can be achieved by variations of the zero order coefficient. As an example of applications, an asymptotic estimate was obtained for the gradient at initial time. The constant in the estimates is the same for all possible choices of the dimension, domain, time horizon, and the coefficients of the parabolic equation. As an another example of application, existence and regularity results are obtained for parabolic equations with time delay for the gradient.

Nikolai Dokuchaev

2007-09-06T23:59:59.000Z

418

Status of APS 1-Mwe Parabolic Trough Project  

SciTech Connect

Arizona Public Service (APS) is currently installing new power facilities to generate a portion of its electricity from solar resources that will satisfy its obligation under the Arizona Environmental Portfolio Standard (EPS). During FY04, APS began construction on a 1-MWe parabolic trough concentrating solar power plant. This plant represents the first parabolic trough plant to begin construction since 1991. Site preparation and construction activities continued throughout much of FY05, and startup activities are planned for Fall 2005 (with completion early in FY06). The plant will be the first commercial deployment of the Solargenix parabolic trough collector technology developed under contract to the National Renewable Energy Laboratory. The plant will use an organic Rankine cycle (ORC) power plant, provided by Ormat. The ORC power plant is much simpler than the conventional steam Rankine cycle plant and allows unattended operation of the facility.

Canada, S.; Brosseau, D.; Kolb, G.; Moore, L.; Cable, R.; Price, H.

2005-11-01T23:59:59.000Z

419

Federal technology alert. Parabolic-trough solar water heating  

DOE Green Energy (OSTI)

Parabolic-trough solar water heating is a well-proven renewable energy technology with considerable potential for application at Federal facilities. For the US, parabolic-trough water-heating systems are most cost effective in the Southwest where direct solar radiation is high. Jails, hospitals, barracks, and other facilities that consistently use large volumes of hot water are particularly good candidates, as are facilities with central plants for district heating. As with any renewable energy or energy efficiency technology requiring significant initial capital investment, the primary condition that will make a parabolic-trough system economically viable is if it is replacing expensive conventional water heating. In combination with absorption cooling systems, parabolic-trough collectors can also be used for air-conditioning. Industrial Solar Technology (IST) of Golden, Colorado, is the sole current manufacturer of parabolic-trough solar water heating systems. IST has an Indefinite Delivery/Indefinite Quantity (IDIQ) contract with the Federal Energy Management Program (FEMP) of the US Department of Energy (DOE) to finance and install parabolic-trough solar water heating on an Energy Savings Performance Contract (ESPC) basis for any Federal facility that requests it and for which it proves viable. For an ESPC project, the facility does not pay for design, capital equipment, or installation. Instead, it pays only for guaranteed energy savings. Preparing and implementing delivery or task orders against the IDIQ is much simpler than the standard procurement process. This Federal Technology Alert (FTA) of the New Technology Demonstration Program is one of a series of guides to renewable energy and new energy-efficient technologies.

NONE

1998-04-01T23:59:59.000Z

420

Analytical Study of High Concentration PCB Paint at the Heavy Water Components Test Reactor  

SciTech Connect

This report provides results of an analytical study of high concentration PCB paint in a shutdown nuclear test reactor located at the US Department of Energy's Savannah River Site (SRS). The study was designed to obtain data relevant for an evaluation of potential hazards associated with the use of and exposure to such paints.

Lowry, N.J.

1998-10-21T23:59:59.000Z

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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421

Nonlocal Operators, Parabolic-type Equations, and Ultrametric Random Walks  

E-Print Network (OSTI)

In this article we introduce a new type of nonlocal operators and study the Cauchy problem for certain parabolic-type pseudodifferential equations naturally associated to these operators. Some of these equations are the p-adic master equations of certain models of complex systems introduced by Avetisov et al. The fundamental solutions of these parabolic-type equations are transition functions of random walks on the n-dimensional vector space over the field of p-adic numbers. We study some properties of these random walks, including the first passage time.

L. F. Chacón-Cortes; W. A. Zúñiga-Galindo

2013-08-22T23:59:59.000Z

422

The parabolic trigonometric functions and the Chebyshev radicals  

E-Print Network (OSTI)

The parabolic trigonometric functions have recently been introduced as an intermediate step between circular and hyperbolic functions. They have been shown to be expressible in terms of irrational functions, linked to the solution of third degree algebraic equations. We show the link of the parabolic trigonometric functions with the Chebyshev radicals and also prove that further generalized forms of trigonometric functions, providing the natural solutions of the quintic algebraic equation, can be defined. We also discuss the link of this family of functions with the modular elliptic functions. 1

G. Dattoli; M. Migliorati; P. E. Ricci

2011-02-08T23:59:59.000Z

423

Natural convective studies within a compound parabolic concentrator enclosure  

SciTech Connect

The contribution due to natural convection within a compound parabolic concentrator enclosure has been experimentally determined. These studies have been conducted within a truncated compound parabolic concentrator having a concentration ratio of 4, a receiver width of 3.175 cm, and a length of 244.0 cm. The receiver was heated electrically while the aperture was provided with a duct that was cooled by water. The limbs of the collector were fabricated from aluminum. Temperatures were directly obtained with copper constantan thermocouples located throughout the entire enclosure and provided the basis needed to calculate the different modes of heat transfer. The constant heat flux

Tatara, R.A.

1983-01-01T23:59:59.000Z

424

Low cost MCFC anodes  

DOE Green Energy (OSTI)

This paper outlines a project, funded under a DOE SBIR grant, which tested a potentially lower cost method of manufacturing MCFC stack anodes and evaluated the feasibility of using the technology in the existing M-C Power Corp. manufacturing facility. The procedure involves adding activator salts to the anode tape casting slurry with the Ni and Cr or Al powders. Two different processes occur during heat treatment in a reducing environment: sintering of the base Ni structure, and alloying or cementation of the Cr or Al powders. To determine whether it was cost-effective to implement the cementation alloying manufacturing process, the M-C Power manufacturing cost model was used to determine the impact of different material costs and processing parameters on total anode cost. Cost analysis included equipment expenditures and facility modifications required by the cementation alloying process.

Erickson, D.S.

1996-12-31T23:59:59.000Z

425

Electromagnetic Casimir forces of parabolic cylinder and knife-edge geometries  

E-Print Network (OSTI)

An exact calculation of electromagnetic scattering from a perfectly conducting parabolic cylinder is employed to compute Casimir forces in several configurations. These include interactions between a parabolic cylinder and ...

Graham, Noah

426

NREL: TroughNet - U.S. Parabolic Trough Power Plant Data  

NLE Websites -- All DOE Office Websites (Extended Search)

U.S. Parabolic Trough Power Plant Data Here you'll find data on parabolic trough power plants in operation and under development in the United States. The data include plant type,...

427

DISCRETE TRANSPARENT BOUNDARY CONDITIONS FOR WIDE ANGLE PARABOLIC EQUATIONS IN UNDERWATER  

E-Print Network (OSTI)

DISCRETE TRANSPARENT BOUNDARY CONDITIONS FOR WIDE ANGLE PARABOLIC EQUATIONS IN UNDERWATER ACOUSTICS "parabolic" equations (WAPEs) in underwater acoustics (assuming cylindrical symmetry). Existing the discretization of transparent bottom boundary conditions. In oceanography one wants to calculate the underwater

Ehrhardt, Matthias

428

Participation in multilateral effort to develop high performance integrated CPC evacuated collectors. [Compound Parabolic Concentrator (CPC)  

SciTech Connect

The University of Chicago Solar Energy Group has had a continuing program and commitment to develop an advanced evacuated solar collector integrating nonimaging concentration into its design. During the period from 1985--1987, some of our efforts were directed toward designing and prototyping a manufacturable version of an Integrated Compound Parabolic Concentrator (ICPC) evacuated collector tube as part of an international cooperative effort involving six organizations in four different countries. This multilateral'' project made considerable progress towards a commercially practical collector. One of two basic designs considered employed a heat pipe and an internal metal reflector CPC. We fabricated and tested two large diameter (125mm) borosilicate glass collector tubes to explore this concept. The other design also used a large diameter (125mm) glass tube but with a specially configured internal shaped mirror CPC coupled to a U-tube absorber. Performance projections in a variety of systems applications using the computer design tools developed by the International Energy Agency (IEA) task on evacuated collectors were used to optimize the optical and thermal design. The long-term goal of this work continues to be the development of a high efficiency, low cost solar collector to supply solar thermal energy at temperatures up to 250{degree}C. Some experience and perspectives based on our work are presented and reviewed. Despite substantial progress, the stability of research support and the market for commercial solar thermal collectors were such that the project could not be continued. A cooperative path involving university, government and industrial collaboration remains the most attractive near term option for developing a commercial ICPC.

Winston, R.; O'Gallagher, J.J.

1992-05-31T23:59:59.000Z

429

Executive Summary: Assessment of Parabolic Trough and Power Tower Solar Technology Cost and Performance Forecasts  

DOE Green Energy (OSTI)

Sargent& Lundy LLC conducted an independent analysis of parabolic trough and power tower solar technology cost and performance.

Not Available

2003-10-01T23:59:59.000Z

430

Assessment of Parabolic Trough and Power Tower Solar Technology Cost and Performance Forecasts  

DOE Green Energy (OSTI)

Sargent and Lundy LLC conducted an independent analysis of parabolic trough and power tower solar technology cost and performance.

Not Available

2003-10-01T23:59:59.000Z

431

PARABOLIC BUNDLES ON ALGEBRAIC SURFACES I- THE DONALDSON–UHLENBECK COMPACTIFICATION  

E-Print Network (OSTI)

Abstract. The aim of this paper is to construct the parabolic version of the Donaldson–Uhlenbeck compactification for the moduli space of parabolic stable bundles on an algenraic surface with parabolic structures along a divisor with normal crossing singularities. We prove the non–emptiness of the moduli space of parabolic stable bundles of rank 2 and also prove the existence of components with smooth points. 1.

V. Balaji; A. Dey; R. Parthasarathi

2006-01-01T23:59:59.000Z

432

$C^{1,\\al}$ regularity of solutions to parabolic Monge-Amp\\'ere equations  

E-Print Network (OSTI)

We study interior $C^{1, \\al}$ regularity of viscosity solutions of the parabolic Monge-Amp\\'ere equation

Daskalopoulos, Panagiota

2009-01-01T23:59:59.000Z

433

Feasibility of low-cost, high-volume production of silane and pyrolysis of silane to semiconductor-grade silicon. Quarterly progress report, April--June 1978. Low cost silicon solar array project  

DOE Green Energy (OSTI)

The purpose of the silane production program is to determine the feasibility and practicality of high-volume, low-cost production of silane (SiH/sub 4/) as an intermediate for obtaining solar-grade silicon metal. The process is based on the synthesis of SiH/sub 4/ by the catalytic disproportionation of chlorosilanes resulting from the reaction of hydrogen, metallurgical silicon, and silicon tetrachloride. The goal is to demonstrate the feasibility of a silane production cost of under $4.00/kg at a production rate of 1000 MT/year. The objective of the silicon production program is to establish the feasibility and cost of manufacturing semiconductor grade polycrystalline silicon through the pyrolysis of silane. The silane-to-silicon conversion is to be investigated in a fluid bed reactor and in a free space reactor. The process design program is to provide JPL with engineering and economic parameters for an experimental unit sized for 25 metric tons of silicon per year and a product-cost estimate for silicon produced on a scale of 100 metric tons per year. The purpose of the capacitive fluid-bed heating program is to explore the feasibility of using electrical capacitive heating to control the fluidized silicon-bed temperature during the heterogeneous decomposition of silane. In addition, a theoretical fluid-bed silicon deposition model was developed for use in the design of a fluid-bed pyrolysis scheme. Progress is reported in each of these areas. (WHK)

Breneman, W.C.; Farrier, E.G.; Morihara, H.

1978-01-01T23:59:59.000Z

434

Establishment of the feasibility of a process capable of low cost, high volume production of silane, SiH/sub 4/. Low cost silicon solar array project, Task I. Quarterly progress report, October 1, 1976--December 31, 1976  

DOE Green Energy (OSTI)

In the study of a process for the low cost, high volume production of silane (SiH/sub 4/) via redistribution of chlorohydrosilanes, the longevity and nature of the amine functional ion exchange resin catalyst was investigated. A modest decline in catalyst activity appears to be the result of loss of amine function during the initiallizing period. Long term activity remains quite high. In preparation for additional studies, deuterium labeled trichlorosilane is being prepared. The nominally 5 kg/day silane-from-dichlorosilane mini-plant has been constructed, leak tested and conditioned for start up. Approval for operation from a Pre-start Up Safety Review Team has been received in conjunction with an approved flameless method for venting silane. Laboratory studies of the hydrogenation of silicon tetrachloride co-product of the silane process are continuing along with the design of a mini-plant scale unit capable of pressurized operation. Preliminary design of a maxi-plant to integrate the entire process is also underway.

Breneman, W.C.; Mui, J.Y.P.

1977-01-01T23:59:59.000Z

435

BSDE driven by Dirichlet Process and Semi-linear Parabolic PDE.  

E-Print Network (OSTI)

BSDE driven by Dirichlet Process and Semi-linear Parabolic PDE. Application to Homogenization) also gives the weak solution of a semi-linear system of parabolic PDEs with a second-order divergence is associated to a divergence-form partial differential operator, and its connection with semi- linear parabolic

Paris-Sud XI, Université de

436

Operator-splitting finite element algorithms for computations of high-dimensional parabolic problems  

E-Print Network (OSTI)

Operator-splitting finite element algorithms for computations of high-dimensional parabolic t i c l e i n f o Keywords: Operator-splitting method Finite element method Parabolic equations High-dimensional problems a b s t r a c t An operator-splitting finite element method for solving high-dimensional parabolic

Ganesan, Sashikumaar

437

The parabolic Anderson model with heavy-tailed potential Peter Morters  

E-Print Network (OSTI)

The parabolic Anderson model with heavy-tailed potential Peter M¨orters Bath joint work with Remco effects can be caused by considerable irregularity of the medium? Peter M¨orters (Bath) The parabolic effects can be caused by considerable irregularity of the medium? Peter M¨orters (Bath) The parabolic

Mörters, Peter

438

ON PARABOLIC SUBGROUPS OF CLASSICAL GROUPS WITH A FINITE NUMBER OF  

E-Print Network (OSTI)

ON PARABOLIC SUBGROUPS OF CLASSICAL GROUPS WITH A FINITE NUMBER OF ORBITS ON THE UNIPOTENT RADICAL , all parabolic subgroups P of G with a finite number of orbits on the unipotent radical Pu algebraic group defined over an algebraically closed field k of characteristic 0. Let P be a parabolic

Bielefeld, University of

439

A Sparse Grid SpaceTime Discretization Scheme for Parabolic Problems  

E-Print Network (OSTI)

A Sparse Grid Space­Time Discretization Scheme for Parabolic Problems Michael Griebel, Daniel Oeltz Abstract In this paper we consider the discretization in space and time of parabolic di#erential equations. This holds in many applications due to the smoothing properties of the propagator of the parabolic PDE (heat

Bartels, Soeren

440

Parabolic equation modeling of high frequency acoustic transmission with an evolving sea surface  

E-Print Network (OSTI)

Parabolic equation modeling of high frequency acoustic transmission with an evolving sea surface J is combined with a rough surface formulation of a parabolic equation model for predicting time an approximation of the time-varying acoustic field. The wide-angle parabolic equation model manages the rough sea

Archer, Cristina Lozej

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Convergence of Singular Limits for Multi-D Semilinear Hyperbolic Systems to Parabolic Systems  

E-Print Network (OSTI)

Convergence of Singular Limits for Multi-D Semilinear Hyperbolic Systems to Parabolic Systems systems to parabolic systems. The singular limits are studied combining Tartar's and G#19;erard of the system. Key words and phrases: Hyperbolic systems, parabolic systems, pseudodi#11;erential oper- ators

442

Parabolic Kazhdan-Lusztig R-polynomials for tight quotients of the symmetric groups 1  

E-Print Network (OSTI)

Parabolic Kazhdan-Lusztig R-polynomials for tight quotients of the symmetric groups formulas for the parabolic Kazhda* *n- Lusztig R-polynomials of the tight quotients* * to that of the Kazhdan-Lusztig polynomials. In 1987 Deodhar ([5]) introduced parabolic analogues of all

Brenti, Francesco

443

REMARKS ON THE PARABOLIC CURVES ON SURFACES AND ON THE MANYDIMENSIONAL M  

E-Print Network (OSTI)

REMARKS ON THE PARABOLIC CURVES ON SURFACES AND ON THE MANY­DIMENSIONAL M ¨ OBIUS--STURM THEORY V. I. Arnold V. A. Steklov Mathematical Institute August 26, 1997 Conjecture on Four Parabolic Curves of several variables) show that natural analogs of inflection points are parabolic curves of surfaces

Arnold, Vladimir Igorevich

444

Elastic parabolic equation solutions for underwater acoustic problems using seismic sources  

E-Print Network (OSTI)

Elastic parabolic equation solutions for underwater acoustic problems using seismic sources Scott D theoretic methods, and attempts to model them with fluid-bottom parabolic equation solu- tions suggest between elastic and acoustic waves, current elastic parabolic equation solutions must be modified to allow

445

Theory of Parabolic Pulse Propagation in Nonlinear Dispersion Decreasing Optical Fiber Amplifiers  

E-Print Network (OSTI)

1 Theory of Parabolic Pulse Propagation in Nonlinear Dispersion Decreasing Optical Fiber Amplifiers pulses with an initial parabolic power profile keep their shape and acquire a linear frequency chirp upon presence of linear amplification, parabolic pulses enjoy the remarkable property of representing a common

Paris-Sud XI, Université de

446

Parabolic equation solution of seismo-acoustics problems involving variations in bathymetry and sediment thickness  

E-Print Network (OSTI)

Parabolic equation solution of seismo-acoustics problems involving variations in bathymetry September 2007; accepted 27 September 2007 Recent improvements in the parabolic equation method are combined to extend this approach to a larger class of seismo-acoustics problems. The variable rotated parabolic

447

Parallelizing Implicit Algorithm for TimeDependent Problems by Parabolic Domain  

E-Print Network (OSTI)

Parallelizing Implicit Algorithm for Time­Dependent Problems by Parabolic Domain Decomposition parallel high­order algorithm for the solution of parabolic and elliptic PDE's. The parallelization decomposition,parabolic and elliptic PDEs, spectral method, lcoal Fourier bases,Green function, parallelization

Averbuch, Amir

448

HEART RATE AND BLOOD PRESSURE VARIABILITY UNDER MOON, MARS AND ZERO GRAVITY CONDITIONS DURING PARABOLIC FLIGHTS  

E-Print Network (OSTI)

PARABOLIC FLIGHTS Wouter Aerts1 , Pieter Joosen1 , Devy Widjaja1,2 , Carolina Varon1,2 , Steven Vandeput1, Belgium, Email: andre.aubert@med.kuleuven.be ABSTRACT Gravity changes during partial-G parabolic flights requires the understanding of how the CVS adapts to gravity changes. Parabolic flights are one

449

HEART RATE AND BLOOD PRESSURE VARIABILITY UNDER MOON, MARS AND ZERO GRAVITY CONDITIONS DURING PARABOLIC FLIGHTS  

E-Print Network (OSTI)

PARABOLIC FLIGHTS Wouter Aerts1 , Pieter Joosen1 , Devy Widjaja1,2 , Carolina Varon1,2 , Steven Vandeput1 Leuven, Belgium, Email: andre.aubert@med.kuleuven.be ABSTRACT Gravity changes during partial-G parabolic to reduce postflight orthostatic intolerance. Key words: parabolic flight; heart rate; blood pressure

450

Parabolic geometries and normal Weyl structures First BGG operators and special solutions  

E-Print Network (OSTI)

Parabolic geometries and normal Weyl structures First BGG operators and special solutions structures & BGG solutions #12;Parabolic geometries and normal Weyl structures First BGG operators to a parabolic geometry. The first operator in each BGG sequence defines a geometric overdetermined system

Drmota, Michael

451

Harnack Inequalities for NonNegative Solutions to Degenerate and Singular Parabolic Partial  

E-Print Network (OSTI)

Harnack Inequalities for Non­Negative Solutions to Degenerate and Singular Parabolic Partial, Local Behaviour of Solutions of Quasi­linear Parabolic Equations, Arch. Rat. Mech. Anal 25, (1967), 81 Parabolic Equations with Measurable Coefficients, Arch. Rational. Mech. Anal. 118, (1992), 257­271. [4] E

Gianazza, Ugo

452

Influence of the initial phase profile on the asymptotic self-similar parabolic dynamics  

E-Print Network (OSTI)

Influence of the initial phase profile on the asymptotic self-similar parabolic dynamics Christophe phase profile on the convergence towards asymptotic self-similar parabolic shape. More precisely, based on numerical simulations, we discuss the impact of an initial linear chirp and a phase shift. If the parabolic

Paris-Sud XI, Université de

453

ERROR ESTIMATES FOR FINITE DIFFERENCE METHODS FOR A WIDE-ANGLE `PARABOLIC' EQUATION  

E-Print Network (OSTI)

ERROR ESTIMATES FOR FINITE DIFFERENCE METHODS FOR A WIDE-ANGLE `PARABOLIC' EQUATION G. D. AKRIVIS-value problem for a third-order p.d.e., a wide-angle `parabolic' equation frequently used in underwater. wide-angle `parabolic' equation, Underwater Acoustics, finite difference error esti- mates, interface

Akrivis, Georgios

454

IMPLICIT-EXPLICIT MULTISTEP FINITE ELEMENT METHODS FOR NONLINEAR PARABOLIC PROBLEMS  

E-Print Network (OSTI)

IMPLICIT-EXPLICIT MULTISTEP FINITE ELEMENT METHODS FOR NONLINEAR PARABOLIC PROBLEMS Georgios boundary value problems for nonlinear parabolic equations. In space we discretize by finite element methods for the time discretization of a class of nonlinear parabolic problems of the form: Given T > 0 and u0 H, find

Akrivis, Georgios

455

Stability and Freezing of Waves in Nonlinear Hyperbolic-Parabolic Systems  

E-Print Network (OSTI)

Stability and Freezing of Waves in Nonlinear Hyperbolic-Parabolic Systems Jens Rottmann to the approximation of traveling waves in hyperbolic-parabolic systems such as the Hodgkin-Huxley model and the Fitz of this system. Note that (1.2) is parabolic in the u variable and (non-strictly) hyperbolic in the v variable

Moeller, Ralf

456

Velocity-jump processes with a finite number of speeds and their asymptotically parabolic nature  

E-Print Network (OSTI)

Velocity-jump processes with a finite number of speeds and their asymptotically parabolic nature-time behavior is described by a corresponding scalar diffusive equation of parabolic type, defined, alternative to the tradi- tional parabolic heat equation, which, on the contrary, mantains the inherent

Recanati, Catherine

457

Parabolic geometries and normal Weyl structures First BGG operators and special solutions  

E-Print Network (OSTI)

Parabolic geometries and normal Weyl structures First BGG operators and special solutions structures & BGG solutions #12;Parabolic geometries and normal Weyl structures First BGG operators the machinery of BGG sequences. Andreas Cap Weyl structures & BGG solutions #12;Parabolic geometries and normal

Drmota, Michael

458

Two parabolic equations for propagation in layered poro-elastic media  

E-Print Network (OSTI)

Two parabolic equations for propagation in layered poro-elastic media Adam M. Metzlera) Applied 10 October 2012; revised 26 March 2013; accepted 9 May 2013) Parabolic equation methods for fluid. A previous parabolic equation solution for one model of range-independent poro-elastic media [Collins et al

459

Parabolic laws of the surrounded-atom model from ab initio calculations on clusters  

E-Print Network (OSTI)

121 Parabolic laws of the surrounded-atom model from ab initio calculations on clusters A alloys, via parabolic laws which are functions of the local concentration. In this paper, using ab initio MO-CI calculations on clusters, we have shown that these parabolic laws have a microscopic electronic

Paris-Sud XI, Université de

460

Parabolic lines and caustics in weakly anisotropic solids 9iFODY##9DYU\\XN  

E-Print Network (OSTI)

117 Parabolic lines and caustics in weakly anisotropic solids 9iFODY##9DYU\\þXN *HRSK@ig.cas.cz Summary The behaviour of parabolic lines and caustics in anisotropic solids can be, in general, very, no parabolic lines appear on the S1 slowness sheet. Consequently, the S1 wave sheet displays no caustics

Cerveny, Vlastislav

Note: This page contains sample records for the topic "high-concentration low-cost parabolic" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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461

Self-accelerating parabolic beams in quadratic nonlinear media Ido Dolev, Ana Libster, and Ady Arie  

E-Print Network (OSTI)

Self-accelerating parabolic beams in quadratic nonlinear media Ido Dolev, Ana Libster, and Ady Arie://apl.aip.org/authors #12;Self-accelerating parabolic beams in quadratic nonlinear media Ido Dolev,a) Ana Libster, and Ady present experimental observation of self-accelerating parabolic beams in quadratic nonlinear media. We

Arie, Ady

462

Repeated games for eikonal equations, integral curvature flows and non-linear parabolic  

E-Print Network (OSTI)

Repeated games for eikonal equations, integral curvature flows and non-linear parabolic integro works of Kohn and the second author (2006 and 2009): general fully non-linear parabolic integro- surfaces. For parabolic integro-differential equations, players choose smooth functions on the whole space

Paris-Sud XI, Université de

463

Flux Distribution of a Single-Axis Tracking Parabolic Trough Array with Photovoltaic Receiver  

E-Print Network (OSTI)

Flux Distribution of a Single-Axis Tracking Parabolic Trough Array with Photovoltaic Receiver G 0200 Australia E-mail: gregory.burgess@anu.edu.au Abstract Single-axis tracking parabolic troughs Long arrays of single-axis tracking parabolic troughs with a fluid filled absorber are a well

464

The Nonlinear Evolution of Disturbances to a Parabolic Jet  

Science Conference Proceedings (OSTI)

It has been shown that the linearized equations for disturbances to a parabolic jet on a ? plane, with curvature Un0(y) such that the basic-state absolute vorticity gradient ? ? Un0(y) is zero, ultimately become inconsistent in the neighborhood ...

G. Brunet; P. H. Haynes

1995-02-01T23:59:59.000Z

465

Theoretical Investigation of the Closed Type Parabolic Trough  

Science Conference Proceedings (OSTI)

Of a closed type parabolic trough solar collector, the thermal performance was analyzed, and a mathematical model was proposed, and experience system was built. As well mathematical model was validated with the measure data. Keywords: trough solar power, collector, numerical simulation, thermal analysis

Zhong-Zhu Qiu; Qiming Li; Peng Li; Yi Zhang; Jia He; Wenwen Guo

2012-07-01T23:59:59.000Z

466

Compound parabolic concentrator with cavity for tubular absorbers  

DOE Patents (OSTI)

A compond parabolic concentrator with a V-shaped cavity is provided in which an optical receiver is emplaced. The cavity redirects all energy entering between the receiver and the cavity structure onto the receiver, if the optical receiver is emplaced a distance from the cavity not greater than 0.27 r (where r is the radius of the receiver).

Winston, Roland (5217C S. University Ave., Chicago, IL 60615)

1983-01-01T23:59:59.000Z

467

Long-term average performance benefits of parabolic trough improvements  

DOE Green Energy (OSTI)

Improved parabolic trough concentrating collectors will result from better design, improved fabrication techniques, and the development and utilization of improved materials. The difficulty of achieving these improvements varies as does their potential for increasing parabolic trough performance. The purpose of this analysis is to quantify the relative merit of various technology advancements in improving the long-term average performance of parabolic trough concentrating collectors. The performance benefits of improvements are determined as a function of operating temperature for north-south, east-west, and polar mounted parabolic troughs. The results are presented graphically to allow a quick determination of the performance merits of particular improvements. Substantial annual energy gains are shown to be attainable. Of the improvements evaluated, the development of stable back-silvered glass reflective surfaces offers the largest performance gain for operating temperatures below 150/sup 0/C. Above 150/sup 0/C, the development of trough receivers that can maintain a vacuum is the most significant potential improvement. The reduction of concentrator slope errors also has a substantial performance benefit at high operating temperatures.

Gee, R.; Gaul, H.W.; Kearney, D.; Rabl, A.

1980-03-01T23:59:59.000Z

468

PARABOLIC TROUGH SOLAR POWER FOR COMPETITIVE U.S. MARKETS  

E-Print Network (OSTI)

Nine parabolic trough power plants located in the California Mojave Desert represent the only commercial development of large-scale solar power plants to date. Although all nine plants continue to operate today, no new solar power plants have been completed since 1990. Over the last several years, the parabolic trough industry has focused much of its efforts on international market opportunities. Although the power market in developing countries appears to offer a number of opportunities for parabolic trough technologies due to high growth and the availability of special financial incentives for renewables, these markets are also plagued with many difficulties for developers. In recent years, there has been some renewed interest in the U.S. domestic power market as a result of an emerging green market and green pricing incentives. Unfortunately, many of these market opportunities and incentives focus on smaller, more modular technologies (such as photovoltaics or wind power), and as a result they tend to exclude or are of minimum long-term benefit to large-scale concentrating solar power technologies. This paper looks at what is necessary for large-scale parabolic trough solar power plants to compete with state-of-the-art fossil power technology in a competitive U.S. power market.

Henry W. Price; Maui Hawaii; Henry W. Price; Rainer Kistner

1998-01-01T23:59:59.000Z

469

Parabolic Trough Solar Power for Competitive U.S. Markets  

DOE Green Energy (OSTI)

Nine parabolic trough power plants located in the California Mojave Desert represent the only commercial development of large-scale solar power plants to date. Although all nine plants continue to operate today, no new solar power plants have been completed since 1990. Over the last several years, the parabolic trough industry has focused much of its efforts on international market opportunities. Although the power market in developing countries appears to offer a number of opportunities for parabolic trough technologies due to high growth and the availability of special financial incentives for renewables, these markets are also plagued with many difficulties for developers. In recent years, there has been some renewed interest in the U.S. domestic power market as a result of an emerging green market and green pricing incentives. Unfortunately, many of these market opportunities and incentives focus on smaller, more modular technologies (such as photovoltaics or wind power), and as a result they tend to exclude or are of minimum long-term benefit to large-scale concentrating solar power technologies. This paper looks at what is necessary for large-scale parabolic trough solar power plants to compete with state-of-the-art fossil power technology in a competitive U.S. power market.

Henry W. Price

1998-11-01T23:59:59.000Z

470

Secondary concentrators for parabolic dish solar thermal power systems  

SciTech Connect

One approach to production of electricity or high-temperature process heat from solar energy is to use point-focusing, two-axis pointing concentrators in a distributed-receiver solar thermal system. This paper discusses some of the possibilities and problems in using compound concentrators in parabolic dish systems. 18 refs.

Jaffe, L.D.; Poon, P.T.

1981-01-01T23:59:59.000Z

471

A Low Cost Immobilization Agent From an Invasive Marine Alga: Caulerpa racemosa var. cylindracea Biomass In Bovine Serum Albumin Immobilization  

E-Print Network (OSTI)

Objectives: Caulerpa racemosa var. cylindracea is a marine green alga which has been widely invading sublittoral ecosystem of the Mediterranean Sea since 1991. Inasmuch as there is no eradication method related to this species so far, use of the dried biomass of C.racemosa for immobilization of bovine serum albumin was studied in the present study. Materials and Methods: Caulerpa racemosa var. cylindracea was collected from Seferihisar – ?zmir by SCUBA diving. Immobilization studies were done by using batch technique under different conditions concerning the determination of optimum temperature, ionic strength, pH and adsorbent dosage. Results: Optimum pH, ionic strength, temperature and amount of adsorbent dosage was found as 7 (pH), 50 mM, 25 0 C and 10 mg, respectively. Conclusion: According to results of this paper, dried and powdered form of Caulerpa racemosa var. cylindracea might be used in some biomolecule immobilization studies as a low cost immobilization agent. This paper proposes an alternative application of biomass of Caulerpa racemosa var. cylindracea after a possible eradication method which will be carried out in future.

Serum Albuminine; Yönelik Dü?ük; Maliyetli Immobilizasyon Ajan?; Sevilay Cengiz; Levent Cavas; M. Kadir Yurdakoc; Levent Cavas

2008-01-01T23:59:59.000Z

472

Low Cost Sorbent for Capturing CO{sub 2} Emissions Generated by Existing Coal-fired Power Plants  

SciTech Connect

TDA Research, Inc. has developed a novel sorbent based post-combustion CO{sub 2} removal technology. This low cost sorbent can be regenerated with low-pressure (ca. 1 atm) superheated steam without temperature swing or pressure-swing. The isothermal and isobaric operation is a unique and advantageous feature of this process. The objective of this project was to demonstrate the technical and economic merit of this sorbent based CO{sub 2} capture approach. Through laboratory, bench-scale and field testing we demonstrated that this technology can effectively and efficiently capture CO{sub 2} produced at an existing pulverized coal power plants. TDA Research, Inc is developing both the solid sorbent and the process designed around that material. This project addresses the DOE Program Goal to develop a capture technology that can be added to an existing or new coal fired power plant, and can capture 90% of the CO{sub 2} produced with the lowest possible increase in the cost of energy. .

Elliott, Jeannine

2013-08-31T23:59:59.000Z

473

Opportunities for Low Cost Titanium in Reduced Fuel Consumption, Improved Emissions, and Enhanced Durability Heavy Duty Vehicles  

DOE Green Energy (OSTI)

The purpose of this study was to determine which components of heavy-duty highway vehicles are candidates for the substitution of titanium materials for current materials if the cost of those Ti components is very significantly reduced from current levels. The processes which could be used to produce those low cost components were also investigated. Heavy-duty highway vehicles are defined as all trucks and busses included in Classes 2C through 8. These include heavy pickups and vans above 8,500 lbs. GVWR, through highway tractor trailers. Class 8 is characterized as being a very cyclic market, with ''normal'' year volume, such as in 2000, of approximately 240,000 new vehicles. Classes 3-7 are less cyclic, with ''normal'' i.e., year 2000, volume totaling approximately 325,000 new vehicles. Classes 3-8 are powered about 88.5% by diesel engines, and Class 2C at very roughly 83% diesel. The engine portion of the study therefore focused on diesels. Vehicle production volumes were used in estimates of the market size for candidate components.

Kraft, E.H.

2002-07-22T23:59:59.000Z

474

Feasibility of low-cost, high-volume production of silane and pyrolysis of silane to semiconductor-grade silicon. Low Cost Silicon Solar Array Project. Quarterly progress report, January--March 1978  

DOE Green Energy (OSTI)

The purpose of the silane production program is to determine the feasibility and practicality of high-volume, low-cost production of silane (SiH/sub 4/) as an intermediate for obtaining solar-grade silicon metal. The process is based on the synthesis of SiH/sub 4/ by the catalytic disproportionation of chlorosilanes resulting from the reaction of hydrogen, metallurgical silicon, and silicon tetrachloride. The goal is to demonstrate the feasibility of a silane production cost of under $4.00/kg at a production rate of 1000 MT/year. The objective of the silicon production program is to establish the viability and economic feasibility of manufacturing semiconductor-grade polycrystalline silicon through the pyrolysis of silane. The silane-to-silicon conversion is to be investigated in a fluid bed reactor and a free space reactor. The purpose of the process design program is to provide JPL with engineering and economic parameters for an experimental facility capable of producing 25 metric tons of silicon per year by the pyrolysis of silane gas. An ancillary purpose is to estimate the cost of silicon produced by the same process on a scale of 1000 metric tons per year. The capacitive fluid-bed heating program is exploring the feasibility of utilizing electrical capacitive heating to control the fluidized silicon bed temperature during the heterogeneous decomposition of silane. In addition, a theoretical fluid-bed silicon deposition model is being developed to be used in a design of a fluid-bed pyrolysis process scheme. Research progress is described in detail. (WHK)

Breneman, W.C.; Farrier, E.G.; Morihara, H.

1978-01-01T23:59:59.000Z

475

Feasibility of low-cost, high-volume production of silane and pyrolysis of silane to semiconductor-grade silicon. Low cost silicon solar array project. Quarterly progress report for July--September 1978  

DOE Green Energy (OSTI)

The project is divided into four tasks: silane production, silicon production, process design, and fluid-bed pyrolysis R and D. The purpose of the silane production task is to determine the feasibility and practicality of high-volume, low-cost production of silane (SiH/sub 4/) as an intermediate for obtaining solar-grade silicon metal. The process is based on the synthesis of SiH/sub 4/ by the catalytic disproportionation of chlorosilanes resulting from the reaction of hydrogen, metallurgical silicon, and silicon tetrachloride. The goal is to demonstrate the feasibility of a silane production cost of under $4.00/kg at a production rate of 1000 MT/year. The objective of the silicon production task is to establish the feasibility and cost of manufacturing semi-conductor grade polycrystalline silicon through the pyrolysis of silane (SiH/sub 4/). The silane-to-silicon conversion is to be investigated in a fluid bed reactor and in a free-space reactor. The process design task is to provide JPL with engineering and economic parameters for an experimental unit sized for 25 metric tons of silicon per year and a product-cost estimate for silicon produced on a scale of 1000 metric tons per year. The purpose of fluid-bed pyrolysis task is to explore the feasibility of using electrical capacitive heating to control the fluidized silicon-bed temperature during the heterogeneous decomposition of silane and to further explore the behavior of a fluid bed. These basic studies will form part of the information necessary to assess technical feasibility of the fluid-bed pyrolysis of silane. Status of these tasks are reported. (WHK)

Breneman, W.C.; Farrier, E.G.; Morihara, H.

1978-01-01T23:59:59.000Z

476

Electromagnetic Casimir Forces of Parabolic Cylinder and Knife-Edge Geometries  

E-Print Network (OSTI)

An exact calculation of electromagnetic scattering from a perfectly conducting parabolic cylinder is employed to compute Casimir forces in several configurations. These include interactions between a parabolic cylinder and a plane, two parabolic cylinders, and a parabolic cylinder and an ordinary cylinder. To elucidate the effect of boundaries, special attention is focused on the "knife-edge" limit in which the parabolic cylinder becomes a half-plane. Geometrical effects are illustrated by considering arbitrary rotations of a parabolic cylinder around its focal axis, and arbitrary translations perpendicular to this axis. A quite different geometrical arrangement is explored for the case of an ordinary cylinder placed in the interior of a parabolic cylinder. All of these results extend simply to nonzero temperatures.

Noah Graham; Alexander Shpunt; Thorsten Emig; Sahand Jamal Rahi; Robert L. Jaffe; Mehran Kardar

2011-03-30T23:59:59.000Z

477

Electromagnetic Casimir forces of parabolic cylinder and knife-edge geometries  

SciTech Connect

An exact calculation of electromagnetic scattering from a perfectly conducting parabolic cylinder is employed to compute Casimir forces in several configurations. These include interactions between a parabolic cylinder and a plane, two parabolic cylinders, and a parabolic cylinder and an ordinary cylinder. To elucidate the effect of boundaries, special attention is focused on the 'knife-edge' limit in which the parabolic cylinder becomes a half-plane. Geometrical effects are illustrated by considering arbitrary rotations of a parabolic cylinder around its focal axis, and arbitrary translations perpendicular to this axis. A quite different geometrical arrangement is explored for the case of an ordinary cylinder placed in the interior of a parabolic cylinder. All of these results extend simply to nonzero temperatures.

Graham, Noah [Department of Physics, Middlebury College, Middlebury, Vermont 05753 (United States); Shpunt, Alexander; Kardar, Mehran [Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Emig, Thorsten [Laboratoire de Physique Theorique et Modeles Statistiques, CNRS UMR 8626, Bat. 100, Universite Paris-Sud, 91405 Orsay cedex (France); Rahi, Sahand Jamal [Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Center for Studies in Physics and Biology, The Rockefeller University, 1230 York Street, New York, New York 10065 (United States); Jaffe, Robert L. [Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Center for Theoretical Physics and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2011-06-15T23:59:59.000Z

478

CargoNet: a low-cost micropower sensor node exploiting quasi-passive wakeup for adaptive asychronous monitoring of exceptional events  

Science Conference Proceedings (OSTI)

This paper describes CargoNet, a system of low-cost, micropower active sensor tags that seeks to bridge the current gap between wireless sensor networks and radio-frequency identification (RFID). CargoNet was aimed at applications in environmental monitoring ... Keywords: active RFID, micropower sensing, power management

Mateusz Malinowski; Matthew Moskwa; Mark Feldmeier; Mathew Laibowitz; Joseph A. Paradiso

2007-11-01T23:59:59.000Z

479

Development of New Low-Cost, High-Performance, PV Module Encapsulant/Packaging Materials: Final Technical Progress Report, 22 October 2002 - 15 November 2007  

DOE Green Energy (OSTI)

Report on objectives to work with U.S.-based PV module manufacturers (c-Si, a-Si, CIS, other thin films) to develop/qualify new low-cost, high-performance PV module encapsulant/packaging materials, and processes using the packaging materials.

Tucker, R.

2008-04-01T23:59:59.000Z

480

Absorber Alignment Measurement Tool for Solar Parabolic Trough Collectors: Preprint  

DOE Green Energy (OSTI)

As we pursue efforts to lower the capital and installation costs of parabolic trough solar collectors, it is essential to maintain high optical performance. While there are many optical tools available to measure the reflector slope errors of parabolic trough solar collectors, there are few tools to measure the absorber alignment. A new method is presented here to measure the absorber alignment in two dimensions to within 0.5 cm. The absorber alignment is measured using a digital camera and four photogrammetric targets. Physical contact with the receiver absorber or glass is not necessary. The alignment of the absorber is measured along its full length so that sagging of the absorber can be quantified with this technique. The resulting absorber alignment measurement provides critical information required to accurately determine the intercept factor of a collector.

Stynes, J. K.; Ihas, B.

2012-04-01T23:59:59.000Z

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481

A Linear Parabolic Trough Solar Collector Performance Model  

E-Print Network (OSTI)

A performance model has been programmed for solar thermal collector based on a linear, tracking parabolic trough reflector focused on a surface-treated metallic pipe receiver enclosed in an evacuated transparent tube: a Parabolic Trough Solar Collector (PTSC). This steady state, single dimensional model comprises the fundamental radiative and convective heat transfer and mass and energy balance relations programmed in the Engineering Equation Solver, EES. It considers the effects of solar intensity and incident angle, collector dimensions, material properties, fluid properties, ambient conditions, and operating conditions on the performance of the collector: the PTSC. Typical performance calculations show that when hot-water at 165C flows through a 6m by 2.3m PTSC with 900 w/m^2 solar insulation and 0 incident angle, the estimated collector efficiency is about 55% The model predictions will be confirmed by the operation of PTSCs now being installed at Carnegie Mellon.

Qu, M.; Archer, D.; Masson, S.

2006-01-01T23:59:59.000Z

482

Parabolic Trough Solar Power Plant Simulation Model: Preprint  

DOE Green Energy (OSTI)

As interest for clean renewable electric power technologies grows, a number of parabolic trough power plants of various configurations are being considered for deployment around the globe. It is essential that plant designs be optimized for each specific application. The optimum design must consider the capital cost, operations and maintenance cost, annual generation, financial requirements, and time-of-use value of the power generated. Developers require the tools for evaluating tradeoffs between these various project elements. This paper provides an overview of a computer model that is being used by scientists and developers to evaluate the tradeoff between cost, performance, and economic parameters for parabolic trough solar power plant technologies. An example is included that shows how this model has been used for a thermal storage design optimization.

Price, H.

2003-01-01T23:59:59.000Z

483

Parabolic Trouogh Optical Characterization at the National Renewable Energy Laboratory  

DOE Green Energy (OSTI)

Solar parabolic trough power plant projects are soon to be implemented in the United States and internationally. In addition to these new projects, parabolic trough power plants totaling approximately 350 MW already exist within the United States and have operated for close to 20 years. As such, the status of the technology exists within several different phases. Theses phases include R&D, manufacturing and installation, and operations and maintenance. One aspect of successful deployment of this technology is achieving and maintaining optical performance. Different optical tools are needed to assist in improving initial designs, provide quality control during manufacture and assembly, and help maintain performance during operation. This paper discusses several such tools developed at SunLab (a joint project of the National Renewable Laboratory and Sandia National Laboratories) for these purposes. Preliminary testing results are presented. Finally, plans for further tool development are discussed.

Wendelin, T. J.

2005-01-01T23:59:59.000Z

484

Parabolic-Dish Solar Concentrators of Film on Foam  

E-Print Network (OSTI)

Parabolic and spherical mirrors are constructed of aluminized PET polyester film on urethane foam. During construction, the chosen shape of the mirror is created by manipulating the elastic/plastic behavior of the film with air pressure. Foam is then applied to the film and, once hardened, air pressure is removed. At an f-number of 0.68, preliminary models have an optical angular spread of less than 0.25 degrees, a factor of 3.3 smaller than that for a perfectly spherical mirror. The possibility exists for creating large-lightweight mirrors with excellent shape and stiffness. These "film-on-foam" construction techniques may also be applicable to parabolic-trough solar concentrators but do not appear to be suitable for optical imaging applications because of irregularities in the film.

Barton, Sean A

2009-01-01T23:59:59.000Z

485

2 Technology Description: Solar Thermal Parabolic Trough Solar Thermal  

E-Print Network (OSTI)

– Parabolic troughs track sun, concentrate incident light onto a centralized, tubular receiver that runs length of each trough – Thermal fluid circulates through all receivers in solar field – Thermal fluid brought to one or more centralized power production facilities – Heat transferred to a steam cycle, drives a steam turbine to generate power – Cooled thermal fluid is then recirculated th through h solar fi field ld – Wet cooling is common, dry cooling possible

Timothy J. Skone; Risks Of Implementation

2012-01-01T23:59:59.000Z

486

Development and testing of Parabolic Dish Concentrator No. 1  

DOE Green Energy (OSTI)

Parabolic Dish Concentrator No. 1 (PDC-1) is a 12-m-diameter prototype concentrator that evolved from a six-year effort to produce a unit with low life-cycle costs for use with thermal-to-electric energy conversion devices. The concentrator assembly features panels made of a resin transfer molded balsa core/fiberglass sandwich with plastic reflective film as the reflective surface and a ribbed framework to hold the panels in place. The concentrator assembly tracks in azimuth and elevation on a base frame riding on a circular track. In 1982, PDC-1 was installed at the Jet Propulsion Laboratory's Parabolic Dish Test Site at Edwards Air Force Base, California. Initial optical testing showed that the panels did not exhibit the proper parabolic contour. After reassembly to correct this problem, further optical testing discovered thermal gradients in the panels with daily temperature changes. In spite of this, PDC-1 has sufficient optical quality to operate satisfactorily in a dish-electric system. With suggested improvements, its performance could be increased. The PDC-1 development effort provided the impetus for creating innovative optical testing methods and also provided valuable information for use in designing and fabricating concentrators of future dish-electric systems.

Dennison, E.W.; Thostesen, T.O.

1984-12-15T23:59:59.000Z

487

Gas Turbine/Solar Parabolic Trough Hybrid Designs: Preprint  

DOE Green Energy (OSTI)

A strength of parabolic trough concentrating solar power (CSP) plants is the ability to provide reliable power by incorporating either thermal energy storage or backup heat from fossil fuels. Yet these benefits have not been fully realized because thermal energy storage remains expensive at trough operating temperatures and gas usage in CSP plants is less efficient than in dedicated combined cycle plants. For example, while a modern combined cycle plant can achieve an overall efficiency in excess of 55%; auxiliary heaters in a parabolic trough plant convert gas to electricity at below 40%. Thus, one can argue the more effective use of natural gas is in a combined cycle plant, not as backup to a CSP plant. Integrated solar combined cycle (ISCC) systems avoid this pitfall by injecting solar steam into the fossil power cycle; however, these designs are limited to about 10% total solar enhancement. Without reliable, cost-effective energy storage or backup power, renewable sources will struggle to achieve a high penetration in the electric grid. This paper describes a novel gas turbine / parabolic trough hybrid design that combines solar contribution of 57% and higher with gas heat rates that rival that for combined cycle natural gas plants. The design integrates proven solar and fossil technologies, thereby offering high reliability and low financial risk while promoting deployment of solar thermal power.

Turchi, C. S.; Ma, Z.; Erbes, M.

2011-03-01T23:59:59.000Z

488

Irrigation market for solar-thermal parabolic-dish systems  

Science Conference Proceedings (OSTI)

The potential size of the onfarm-pumped irrigation market for solar thermal parabolic dish systems in seven high-insolation states is estimated. The study is restricted to the displacement of three specific fuels: gasoline, diesel and natural gas. A model was developed to estimate the optimal number of parabolic dish modules per farm based on the minimum cost mix of conventional and solar thermal energy required to meet irrigation needs. Results indicate that the near-term market for such systems depends not only on the type of crop and method of irrigation, but also on the optimal utilization of each added module, which in turn depends on the price of conventional fuel, real discount rate, marginal cost of the solar thermal power system, local insolation level and parabolic dish system efficiency. The study concludes that the potential market size for onfarm-pumped irrigation applications ranges from 101,000 modules when a 14% real discount rate is assumed to 220,000 modules when the real discount rate drops to 8%. Arizona, Kansas, Nebraska, New Mexico and Texas account for 98% of the total demand for this application, with the natural gas replacement market accounting for the largest segment (71%) of the total market.

Habib-agahi, H.; Jones, S.C.

1981-09-01T23:59:59.000Z

489

Development of a Low-Cost, Durable Membrane and MEA for Stationary and Mobile Fuel Cell Applications  

DOE Green Energy (OSTI)

The development of low cost, durable membranes and membranes electrode assemblies (MEAs) remain a critical challenge for the successful introduction of fuel cells into mass markets. It was the goal of the team lead by Arkema, Inc. (formerly Atofina, Inc.) to address these shortages. Thus, this project addresses the following technical barriers from the Fuel Cells section of the Hydrogen Fuel Cells and Infrastructure Technologies Program Multi-Year Research, Development and Demonstration Plan: (A) Durability (B) Cost Arkema’s approach consisted in using blends of polyvinylidenefluoride (PVDF) and proprietary sulfonated polyelectrolytes. The strength and originality of Arkema’s approach lies in the decoupling of ion conductivity from the other requirements. Kynar® (Arkema trade name for PVDF) provides an exceptional combination of properties that make it ideally suited for a membrane matrix. In a first phase, Arkema demonstrated the feasibility of the concept with the M31 membrane generation. After MEA optimization, it was shown that the beginning-of-life (BOL) performance of M31 MEAs was essentially on a par with that of PFSA MEAs at 60ºC under fully humidified conditions. On the other hand, long-term durability studies showed a high decay rate of 45µV/h over a 2100 hr. test. Arkema then designed several families of polyelectrolyte candidates, which – in principle – could not undergo the same failure mechanisms. A new membrane candidate was developed: M41. It offered the same generally good mechanical, ex-situ conductivity and gas barrier properties as M31. In addition, ex-situ accelerated testing suggested a several orders of magnitude improvement in chemical stability. M41 based MEAs showed comparable BOL performance with that of PFSA (80ºC, 100% RH). M41 MEAs were further shown to be able to withstand several hours temperature excursions at 120ºC without apparent damage. Accelerated studies were carried out using the DOE and/or US Fuel Cell Council protocols. M41 MEAs shown sizeable advantages over PFSA MEAs in the Open Circuit Voltage Hold test, Relative Humidity Cycling test and the Voltage Cycling test. The main known limitation of the M41 family is its ability to function well at low RH.

Michel Foure, Scott Gaboury, Jim Goldbach, David Mountz and Jung Yi (no longer with company)

2008-01-31T23:59:59.000Z

490

Parabolic-Trough Technology Roadmap: A Pathway for Sustained Commercial Development and Deployment of Parabolic-Trough Technology  

DOE Green Energy (OSTI)

Technology roadmapping is a needs-driven technology planning process to help identify, select, and develop technology alternatives to satisfy a set of market needs. The DOE's Office of Power Technologies' Concentrating Solar Power (CSP) Program recently sponsored a technology roadmapping workshop for parabolic trough technology. The workshop was attended by an impressive cross section of industry and research experts. The goals of the workshop were to evaluate the market potential for trough power projects, develop a better understanding of the current state of the technology, and to develop a conceptual plan for advancing the state of parabolic trough technology. This report documents and extends the roadmap that was conceptually developed during the workshop.

Price, H.; Kearney, D.

1999-01-31T23:59:59.000Z

491

Method and source for producing a high concentration of positively charged molecular hydrogen or deuterium ions  

DOE Patents (OSTI)

A high concentration of positive molecular ions of hydrogen or deuterium gas is extracted from a positive ion source having a short path length of extracted ions, relative to the mean free path of the gas molecules, to minimize the production of other ion species by collision between the positive ions and gas molecules. The ion source has arrays of permanent magnets to produce a multi-cusp magnetic field in regions remote from the plasma grid and the electron emitters, for largely confining the plasma to the space therebetween. The ion source has a chamber which is short in length, relative to its transverse dimensions, and the electron emitters are at an even shorter distance from the plasma grid, which contains one or more extraction apertures.

Ehlers, Kenneth W. (Alamo, CA); Leung, Ka-Ngo (Hercules, CA)

1988-01-01T23:59:59.000Z

492

MATERIALS DEGRADATION ANALYSIS AND DEVELOPMENT TO ENABLE ULTRA LOW COST, WEB-PROCESSED WHITE P-OLED FOR SSL  

SciTech Connect

Progress over Phase II of DE-FG02-07ER86293 'Materials Degradation Analysis and Development to Enable Ultra Low Cost, Web-Processed White P-OLED for SSL' was initially rapid in terms of device performance improvements. We exceeded our device luminance lifetime goals for printed flexible white OLEDs as laid out in our project proposal. Our Phase II performance target was to demonstrate >1500 hours luminance lifetime at 100 Cd/m2 from a printed flexible device. We now have R&D devices well in excess of 8000 hrs lifetime at 100 Cd/m2, tested in air. We also were able to produce devices which met the voltage target of >1500 hours below 15V operation. After completing the initial performance milestones, we went on to focus on color-related degradation issues which were cited as important to commercialization of the technology by our manufacturing partners. We also put additional focus on cathode work as the active material development that occurred over the STTR time period required an adaptation of the cathode from the original cathode formulations which were developed based on previous generation active layer materials. We were able to improve compatibility of the cathode with some of the newer generation active layer materials and improve device yield and voltage behavior. An additional objective of the initial Phase II was to further develop the underlying manufacturing technology and real-life product specifications. This is a key requirement that must be met to ensure eventual commercialization of this DOE-funded technology. The link between commercial investment for full commercialization and R&D efforts in OLED solid State Lighting is often a large one. Add-Vision's lower cost, printed OLED manufacturing approach is an attraction, but close engagement with manufacturing partners and addressing customer specifications is a very important link. Manufacturing technology encompasses development of moisture reduction encapsulation technology, improved cost performance, and reductions in operating voltage through thinner and higher uniformity active device layers. We have now installed a pilot encapsulation system at AVI for controlled, high throughput lamination encapsulation of flexible OLEDs in a novel process. Along with this, we have developed, with our materials supply partners, adhesives, barrier films and other encapsulation materials and we are showing total air product lifetimes in the 2-4 years range from a process consistent with our throughput goals of {approx}1M device per month ({approx}30,000 sq. ft. of processed OLEDs). Within the last year of the project, we have been working to introduce the manufacturing improvements made in our LEP deposition and annealing process to our commercial partners. Based on the success of this, a pilot scale-up program was begun. During this process, Add-Vision was acquired by a strategic partner, in no small part, because of the promise of future success of the technology as evidenced by our commercial partners pilot scale-up plans. Overall, the performance, manufacturing and product work in this project has been successful. Additional analysis and device work at LBL has also shown a unique adhesion change with device bias stressing which may result from active layer polymer cross-linking during bias stressing of device. It was shown that even small bias stresses, as a fraction of a full device lifetime stress period, result in measurable chemical change in the device. Further work needs to be conducted to fully understand the chemical nature of this interaction. Elucidation of this effect would enable doped OLED formulation to be engineered to suppress this effect and further extend lifetimes and reduce voltage climb.

DR. DEVIN MACKENZIE

2011-12-13T23:59:59.000Z

493

Low Cost Chemical Feedstocks Using an Improved and Energy Efficient Natural Gas Liquid (NGL) Removal Process, Final Technical Report  

SciTech Connect

The overall objective of this project is to develop a new low-cost and energy efficient Natural Gas Liquid (NGL) recovery process - through a combination of theoretical, bench-scale and pilot-scale testing - so that i