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1

formation at the Riley Ridge Unit on the LaBarge Platform in Southwest  

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

formation at the Riley Ridge Unit on the LaBarge Platform in Southwest formation at the Riley Ridge Unit on the LaBarge Platform in Southwest Wyoming. The test will demonstrate the ability of a geological formation to safely, permanently, and economically store more than 2 million tons of carbon dioxide (CO 2 ); examine the entire CO 2 injection process from pre-injection characterization, injection process monitoring, and post-injection monitoring; and provide the groundwork for future carbon capture and storage (CCS) opportunities in the region. The eolian sandstone formations present throughout the region offer the opportunity to store more than 100 years of CO 2 emissions from regional point sources. BSCSP plans to drill a CO 2 injection well and inject up to 1 million tons of CO 2 per year into the Nugget Sandstone

2

The Solar Chimney  

E-Print Network (OSTI)

Hot air for the solar chimney is produced by the greenhouse effect in a simple air collec- tor consisting only of a glass or plastic film covering stretched ...

scul

2002-11-27T23:59:59.000Z

3

Analyzes of Solar Chimney Design.  

E-Print Network (OSTI)

?? The aim of this work to study the solar chimney installed in the EPT-lab of the NTNU. The work starts with the development of… (more)

Paez Ortega, Elias

2011-01-01T23:59:59.000Z

4

Dynamic evaluation of the solar chimney.  

E-Print Network (OSTI)

??Previous studies on the solar chimney have shown that its structural integrity might be compromised by the occurrence of resonance. A structure may displace excessively… (more)

Rousseau, Jean-Pierre

2005-01-01T23:59:59.000Z

5

Simulation study of solar chimney assisted solarium.  

E-Print Network (OSTI)

??The objective of this study is to develop a modelling method for optimizing the design of a solar chimney integrated solarium to maximize the ventilation… (more)

Ravanfar, Afrooz (Author)

2013-01-01T23:59:59.000Z

6

CFD analysis for solar chimney power plants  

Science Journals Connector (OSTI)

Abstract Solar chimney power plants are investigated numerically using ANSYS Fluent and an in-house developed Computational Fluid Dynamics (CFD) code. Analytical scaling laws are verified by considering a large range of scales with tower heights between 1 m (sub-scale laboratory model) and 1000 m (largest envisioned plant). A model with approximately 6 m tower height is currently under construction at the University of Arizona. Detailed time-dependent high-resolution simulations of the flow in the collector and chimney of the model provide detailed insight into the fluid dynamics and heat transfer mechanisms. Both transversal and longitudinal convection rolls are identified in the collector, indicating the presence of a Rayleigh–Bénard–Poiseuille instability. Local separation is observed near the chimney inflow. The flow inside the chimney is fully turbulent.

Hermann F. Fasel; Fanlong Meng; Ehsan Shams; Andreas Gross

2013-01-01T23:59:59.000Z

7

Numerical Investigation of Solar Chimney Power Plant in UAE  

Science Journals Connector (OSTI)

This paper presents a numerical simulation results for a steady air flow inside a solar chimney power plant. A standard k-epsilon turbulence model is used to model a prototype solar chimney that was built in Al A...

Mohammad O. Hamdan; Saud Khashan

2014-01-01T23:59:59.000Z

8

Wind- Chimney (Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation).  

E-Print Network (OSTI)

?? WIND-CHIMNEY Integrating the principles of a wind-catcher and a solar chimney to provide natural ventilation Fereshteh Tavakolinia Abstract This paper suggests using a wind-catcher… (more)

Tavakolinia, Fereshteh

2011-01-01T23:59:59.000Z

9

Floating Solar Chimney Technology: A Solar Proposal for China  

Science Journals Connector (OSTI)

The Floating Solar Chimney (FSC) Technology Power Plants, are made... • A large solar collector with a transparent roof that warms the air...

Christos Papageorgiou

2009-01-01T23:59:59.000Z

10

Critical evaluation of heat transfer coefficients applicable to solar chimney power plant collectors  

Science Journals Connector (OSTI)

A solar chimney power plant consists of a translucent collector ... and guides it into the base of a chimney at its centre. The buoyant air rises in the chimney, and electricity is generated through one or ... tu...

M. A. dos S. Bernardes; T. W. von Backström…

2009-01-01T23:59:59.000Z

11

Experimental Study And Simulation Of Airflow In Solar Chimneys  

Science Journals Connector (OSTI)

A detailed mathematical simulation and experimental investigation of airflow in solar chimneys is studied in this paper. Several experimental studies were carried out on the solar chimney; their choice depends on the parameter of the design and the thermal performances for different geometrical configurations. The experimental tests show that the field speeds in the chimney is influenced by the width of the channel and also of the angle of inclination of the chimney. Therefore, investigations have been carried out in this paper to find the effect of inclination on the performance of solar chimney in Ouargla Province, Algeria. The simulation of this problem is implemented into the commercial CFD code Fluent 6.3. 26. The conservation equations of mass, continuity and energy are solved by the Finite Volume Method. The validation of the results is presented. An good agreement between the experimental results and simulation ones is observed.

Nadia Saifi; Noureddine Settou; Boubekeur Dokkar; Belkhir Negrou; Nasreddine Chennouf

2012-01-01T23:59:59.000Z

12

Comparison of conventional solar chimney power plants and sloped solar chimney power plants using second law analysis  

Science Journals Connector (OSTI)

Abstract In the present paper the performance of solar chimney power plants based on second law analysis is investigated for various configurations. A comparison is made between the conventional solar chimney power plant (CSCPP) and the sloped solar chimney power plant (SSCPP). The appropriate entropy generation number and second-law efficiency for solar chimney power plants are proposed in this study. Results show that there is the optimum collector size that provides the minimum entropy generation and the maximum second-law efficiency. The second-law efficiency of both systems increases with the increasing of the system height. The study reveals the influence of various effects that change pressure and temperature of the systems. It was found that SSCPP is thermodynamically better than CSCPP for some configurations. The results obtained here are expected to provide information that will assist in improving the overall efficiency of the solar chimney power plant.

Atit Koonsrisuk

2013-01-01T23:59:59.000Z

13

Chimneys: Keep 'em Clean... and Closed | Department of Energy  

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

Chimneys: Keep 'em Clean... and Closed Chimneys: Keep 'em Clean... and Closed Chimneys: Keep 'em Clean... and Closed October 27, 2008 - 3:34pm Addthis Drew Bittner Web Manager, Office of Energy Efficiency and Renewable Energy Growing up in Wisconsin and New Jersey, my family homes always had a fireplace. They were perfect for cold winter nights, for "indoors camping" or just for sitting near and watching TV. There's very little like the crackle and heat of an open fire. That said, while your fireplace may be decorative, enjoyable, even functional, it's also one other thing: a great big hole going to the outdoors. Many families have glass doors across their fireplaces. That's a good start, but there's something else you should remember to do, and that is keep the chimney closed. It's more than just a good idea; hot air rises,

14

Feasibility study of a solar chimney power plant in Jordan  

Science Journals Connector (OSTI)

A solar chimney power plant system is theoretically designed for ... by mathematical software. The actual values of solar irradiation in Jordan are used in the ... simulation to predict the power output of the solar

Aiman Al Alawin; Omar Badran; Ahmad Awad; Yaser Abdelhadi…

2012-10-01T23:59:59.000Z

15

Simulation Calculation on Solar Chimney Power Plant System  

Science Journals Connector (OSTI)

It is unpractical to establish a Solar Chimney Power Plant System (SCPPS) used to ... flow field of the SCPPS which caused by solar radiation intensity have been analyzed. The calculated ... as well as the differ...

HuiLan Huang; Hua Zhang; Yi Huang; Feng Lu

2007-01-01T23:59:59.000Z

16

Chimney for enhancing flow of coolant water in natural circulation boiling water reactor  

DOE Patents (OSTI)

A chimney which can be reconfigured or removed during refueling to allow vertical removal of the fuel assemblies is disclosed. The chimney is designed to be collapsed or dismantled. Collapse or dismantlement of the chimney reduces the volume required for chimney storage during the refueling operation. Alternatively, the chimney has movable parts which allow reconfiguration of its structure. In a first configuration suitable for normal reactor operation, the chimney is radially constricted such that the chimney obstructs vertical removal of the fuel assemblies. In a second configuration suitable for refueling or maintenance of the fuel core, the parts of the chimney which obstruct access to the fuel assemblies are moved radially outward to positions whereas access to the fuel assemblies is not obstructed. 11 figs.

Oosterkamp, W.J.; Marquino, W.

1999-01-05T23:59:59.000Z

17

Simulation and optimization of geometric parameters of a solar chimney in Tehran  

Science Journals Connector (OSTI)

Abstract An analytical and numerical study for geometrical optimizing of a solar chimney prototype at University of Tehran was performed. A fundamental mathematical model that describes the flow was presented, and the performance evaluation of solar chimney was simulated with operational and geometric configurations. The numerical predictions were validated through comparison with the experimental data of the solar chimney pilot which was constructed in height of 2 m and collector radius of 3 m. The results show that, the collector inlet of 6 cm, the chimney height of 3 m, and the chimney diameter of 10 cm were the best alternatives for the constructed solar chimney pilot. It is found that the velocity magnitude can be raised to 4–25% in different cases; also the analysis indicated that the height and diameter of the chimney are the most important physical variables for solar chimney design.

Alibakhsh Kasaeian; Mehran Ghalamchi; Mehrdad Ghalamchi

2014-01-01T23:59:59.000Z

18

The Effect of the Inclined Angel on the Output in a Solar Chimney Power Plant System  

Science Journals Connector (OSTI)

Numerical simulation in large-scale solar chimney is not usually studied in previous study. ... In this paper, the height of the chimney is 1km, and the collector radius is ... used in the entrance and exit of th...

J. M. Sun; M. Yang; Y. G. Shan

2007-01-01T23:59:59.000Z

19

Experimental, CFD simulation and parametric studies on modified solar chimney for building ventilation  

Science Journals Connector (OSTI)

The solar chimney is a passive solar system which can be used for enhance ... and space conditioning of a building. A solar chimney design is modified and installed at CBRI ... for prediction of velocity and temp...

Shiv Lal

2014-01-01T23:59:59.000Z

20

Feasibility study on optimization of a typical solar chimney power plant  

Science Journals Connector (OSTI)

The solar chimney which has been built in Kerman (Kerman ... a small scale electrical power plant. The chimney of this unit has 60 m height ... deliberate and propose suggestions to maximize usage of solar energy...

Mohsen Najmi; Ali Nazari; Hossein Mansouri; Ghazzanfar Zahedi

2012-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "labarge hogsback chimney" 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

BRRR...5 Ways to Maximize Your Fireplace and Chimney Efficiency |  

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

BRRR...5 Ways to Maximize Your Fireplace and Chimney Efficiency BRRR...5 Ways to Maximize Your Fireplace and Chimney Efficiency BRRR...5 Ways to Maximize Your Fireplace and Chimney Efficiency January 30, 2013 - 5:13pm Addthis A warm fireplace can save you energy and money with proper maintenance. | Photo courtesy of ©iStockphoto.com/Pgiam. A warm fireplace can save you energy and money with proper maintenance. | Photo courtesy of ©iStockphoto.com/Pgiam. Erin Connealy Communications Specialist, Office of Energy Efficiency and Renewable Energy How can I participate? Follow these tips to make sure that your cozy fireplace isn't wasting energy in your home. The Northeast and much of the country has had very frigid temperatures lately! If you're like me, nothing sounds better than cozying up to the fireplace with a cup of cocoa on a cold day. But be aware that while

22

Chimney Rock Public Power Dist | Open Energy Information  

Open Energy Info (EERE)

Chimney Rock Public Power Dist Chimney Rock Public Power Dist Jump to: navigation, search Name Chimney Rock Public Power Dist Place Nebraska Utility Id 3495 Utility Location Yes Ownership P NERC Location MRO NERC MRO Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png ELECTRIC THERMAL STORAGE Commercial GENERAL SEASONAL Commercial IRRIGATION SERVICE Single Phase Commercial IRRIGATION SERVICE Three Phase Commercial IRRIGATION STANDBY RATE, Single Phase Commercial IRRIGATION STANDBY RATE, Three Phase Commercial LARGE POWER SERVICE Commercial RESIDENTIAL SERVICE AND SEASONAL SERVICE Residential

23

A Method of Decreasing Power Output Fluctuation of Solar Chimney Power Generating Systems  

Science Journals Connector (OSTI)

Severe fluctuation of power output is a common problem in the various generating systems of renewable energies. The hybrid energy storage system with water and soil is adopted to decrease the fluctuation of solar chimney power generating systems in the ... Keywords: Solar chimney power generating system, power output fluctuation, hybrid energy storage layer, collector, chimney

Meng Fanlong; Ming Tingzhen; Pan Yuan

2011-01-01T23:59:59.000Z

24

Cloud Formation in the Plumes of Solar Chimney Power Generation Facilities: A Modeling Study  

E-Print Network (OSTI)

1 Cloud Formation in the Plumes of Solar Chimney Power Generation Facilities: A Modeling Study Institute of Technology, 311 Ferst Drive, Atlanta , Georgia 30332-0340, USA Abstract The solar chimney power the potential impacts on plant capacity resulting from cloud formation within or downwind of the solar chimney

Nenes, Athanasios

25

Effects of collector radius and chimney height on power output of a solar chimney power plant with turbines  

Science Journals Connector (OSTI)

A comprehensive theoretical model is proposed for the performance evaluation of a solar chimney power plant (SCPP), and has been verified by the experimental data of the Spanish prototype. This model takes account of the effects of flow and heat losses, and the temperature lapse rates inside and outside the chimney. There is a maximum power output for a certain SCPP under a given solar radiation condition, due to flow and heat losses and the installation of the turbines. In addition, the design flow rate of the turbine in the SCPP system is found beneficial for power output when it is lower than that at the maximum power point. Furthermore, a limitation on the maximum collector radius exists for the maximum attainable power of the SCPP; whereas, no such limitation exists for chimney height in terms of contemporary construction technology.

Jing-yin Li; Peng-hua Guo; Yuan Wang

2012-01-01T23:59:59.000Z

26

Economic analysis of solar chimney power plants in Northwest China  

Science Journals Connector (OSTI)

Solar chimney power plant (SCPP) with a long life span is a promising large-scale solar thermal utilization technology. This paper performs an economic analysis for the conventional solar chimney power plant (CSCPP) and the sloped solar chimney power plant (SSCPP) in Northwest China. Cash flows are influenced by many factors including the investment the payback period the inflation rate and the sale price of solar electricity. The techno-economic analyses of the CSCPPs and SSCPPs are performed taking Lanzhou China as a case study. The results show that the SCPP investment is influenced by both its configuration and the material price and the SSCPP is more cost-effective than the CSCPP during the system life span. In addition the SCPP with large power capacity holds good competitiveness with the conventional fossil fuel combustion plants. The economic evaluation of building SCPPs in Northwest China is of high significance considering the local abundant solar radiation favorable government policy and under-developing economics.

Fei Cao; Huashan Li; Liang Zhao; Liejin Guo

2013-01-01T23:59:59.000Z

27

Numerical Study on the Thermal Environment of UFAD System with Solar Chimney for the Data Center  

Science Journals Connector (OSTI)

Abstract To improve the thermal environment in the data center, a solar chimney was integrated with Under-floor Air Distribution (UFAD) system in the Computational Fluid Dynamics (CFD) software Airpak. By using the validated model, three types of solar chimney, such as solar chimney transversely over the hot and cold aisles, solar chimney lengthways above the cold or hot aisles, were simulated. The comparison between the model calculation result shows that all types of solar chimneys used in this paper has great potential in providing a better temperature and airflow distribution. Especially in the case of the solar chimney above the cold aisle, the temperature in upper zone of cold aisle can be decreased by 13 °C, and the temperature field inside the rack is improved greatly without any additional power.

Kai Zhang; Xiaosong Zhang; Shuhong Li; Geng Wang

2014-01-01T23:59:59.000Z

28

Optimization and control of a large-scale solar chimney power plant.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: The dissertation builds on previous research (Pretorius, 2004) and investigates the optimization and control of a large-scale solar chimney power plant. Performance results… (more)

Pretorius, Johannes Petrus

2007-01-01T23:59:59.000Z

29

Turbine layout for and optimization of solar chimney power conversion units.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: The power conversion unit of a large solar chimney power plant converts the fluid power, first into mechanical power, and then into electrical… (more)

Fluri, Thomas Peter

2008-01-01T23:59:59.000Z

30

The design of solar chimney power plant for sustainable power generation.  

E-Print Network (OSTI)

??The solar chimney power plant (SCPP) also known as ‘solar updraft tower’ is a nonconcentrating solar thermal technology, which employs both solar and wind energy… (more)

Asante, David

2014-01-01T23:59:59.000Z

31

The Improvement of Natural Ventilation in an Industrial Workshop by Solar Chimney  

Science Journals Connector (OSTI)

This paper presents a numerical simulation based on computational fluid dynamics (CFD) method on the enhancement of natural ventilation in an industrial workshop with heat source induced by solar chimney (SC). Four types of SC were designed to attach ... Keywords: natural ventilation, solar chimney, industrtial workshop, numerical simulation, thermal comfort

Yu-feng Xue; Ya-xin Su

2011-02-01T23:59:59.000Z

32

Modelling and simulation of acid gas condensation in an industrial chimney - article no. A39  

SciTech Connect

Coal power stations as well as waste incinerators produce humid acid gases which may condense in industrial chimneys. These condensates can cause corrosion of chimney internal cladding which is made of stainless steel, nickel base alloys or non metallic materials. In the aim of polluting emission reduction and material optimal choice, it is necessary to determine and characterize all the phenomena which occur throughout the chimney and more especially condensation and dissolution of acid gases (in this particular case, sulfur dioxide SO{sub 2}).

Serris, E.; Cournil, M.M.; Peultier, J. [Ecole des Mines de St Etienne, St Etienne (France)

2009-07-01T23:59:59.000Z

33

Study on solar chimney used for room natural ventilation in Nanjing  

Science Journals Connector (OSTI)

Abstract The study investigated the performance of solar chimney, which is integrated into a one-story building. A module was developed for and implemented in the Energy Plus program for the simulation and determination of the energy impact of thermal chimneys. The basic concepts, assumptions, and algorithms are implemented into the Energy Plus program to predict the performance of a solar chimney. The results showed that in Nanjing 45° is found to be optimum for obtaining maximum rate of ventilation and the rate of ventilation increases with increase of the ratio between height of absorber and gap between glass and absorber. This finding is in agreement with experimental results.

Xu Jianliu; Liu Weihua

2013-01-01T23:59:59.000Z

34

Thermal analyses of combined utilization process of seawater by solar chimney  

Science Journals Connector (OSTI)

It is promising to simultaneously develop multiple products through the combined utilization of seawater by solar chimney technology. A small scale experimental system was ... is nearly saturated at the entrance ...

Yiping Wang ???; Zhenlei Fang ???; Li Zhu ? ?

2009-12-01T23:59:59.000Z

35

Numerical Analysis of the Solar Chimney Power Plant with Energy Storage Layer  

Science Journals Connector (OSTI)

Numerical simulations have been performed to analyze the characteristics of heat transfer and air flow in the solar chimney power plant system with energy storage layer. Different mathematical models for the coll...

Ming Tingzhen; Liu Wei; Pan Yuan

2009-01-01T23:59:59.000Z

36

Influence of chimneys on combustion characteristics of buoyantly driven biomass stoves  

Science Journals Connector (OSTI)

Abstract This work examines whether a chimney has influence over the combustion characteristics of biomass within a stove. Experimental work as well as a simplified chemical kinetic model suggests that a chimney plays an active role in the performance of a stove by influencing the overall air-to-fuel ratio and subsequently the production of carbon monoxide. Two different stoves, operated at multiple wood consumption rates, were shown to run with steady state excess air of 300 % ? 1250 %. The wood consumption rate was found to be independent of the chimney draft for both stoves. Increasing draft was shown to increase excess air. Draft served to cool combustion gases through dilution with makeup air. Increasing excess air decreased modified combustion efficiency in experiments and kinetic modeling. Increasing the frictional loss coefficient of a chimney by decreasing the diameter was shown to reduce CO production through a reduction of excess air.

J. Prapas; M.E. Baumgardner; A.J. Marchese; B. Willson; M. DeFoort

2014-01-01T23:59:59.000Z

37

Chimneys: Warm and Cozy or Easy Exit for Your Heat? | Department of Energy  

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

Chimneys: Warm and Cozy or Easy Exit for Your Heat? Chimneys: Warm and Cozy or Easy Exit for Your Heat? Chimneys: Warm and Cozy or Easy Exit for Your Heat? January 12, 2010 - 10:21am Addthis Drew Bittner Web Manager, Office of Energy Efficiency and Renewable Energy Both of my childhood homes featured fireplaces. If you've had one, you know how terrific they can be-great places to bask on cold winter nights, an easy opportunity to toast marshmallows, picturesque, undeniably a pleasure in the house that has one. However, fireplaces have chimneys...and chimneys can be problems when it comes to home energy efficiency. For one thing, many people do not take care to close their chimney flue when there is no fire. This means warm air has an easy exit from your home; you have a big hole in your roof, after all, and warm air will take advantage of that. Ditto cold air in the

38

A single dimensionless variable for solar chimney power plant modeling  

SciTech Connect

The solar chimney power plant is a relatively new technology for generating electricity from solar energy. In this paper dimensional analysis is used together with engineering intuition to combine eight primitive variables into only one dimensionless variable that establishes a dynamic similarity between a prototype and its scaled models. Three physical configurations of the plant were numerically tested for similarity: fully geometrically similar, partially geometrically similar, and dissimilar types. The values of the proposed dimensionless variable for all these cases were found to be nominally equal to unity. The value for the physical plant actually built and tested previously was also evaluated and found to be about the same as that of the numerical simulations, suggesting the validity of the proposition. The physical meaning of this dimensionless (similarity) variable is also interpreted; and the connection between the Richardson number and this new variable was found. It was found also that, for a fixed solar heat flux, different-sized models that are fully or partially geometrically similar share an equal excess temperature across the roof outlet. (author)

Koonsrisuk, Atit; Chitsomboon, Tawit [School of Mechanical Engineering, Institute of Engineering, Suranaree University of Technology, Muang District, Nakhon Ratchasima 30000 (Thailand)

2009-12-15T23:59:59.000Z

39

Mathematical analysis of the influence of the chimney height and collector area on the performance of a roof top solar chimney  

Science Journals Connector (OSTI)

Abstract Determination of the roof top solar chimney behaviour during the day time is essential for the proper designing and sizing. This paper presents a mathematical model and analysis of an inclined type roof top solar chimney. The thermal energy and fluid flow processes were simulated mathematically based on the energy and mass balances. The model was converted to a MATLAB computer program and solved by iteration method. The analysis was carried out at various collector areas (15, 150, and 600 m2) and various chimney heights (5, 10, and 15 m). The model was validated by comparing the results with the experimental measurements. The developed mathematical model was able to predict the dynamic behaviour of the system. The results demonstrated that the performance of the system is highly influenced by the solar intensity. The system becomes functional for space ventilation when the solar intensity is higher than 400 W/m2 with a 15 m2 collector area and 5 m chimney height, under Malaysia and similar weather conditions. As the wind speed increases from 1.5 to 6 m/s, it contributes to reduce the system performance by 25% at solar intensity of 900 W/m2.

Hussain H. Al-Kayiem; Sreejaya K.V.; Syed Ihtsham Ul-Haq Gilani

2014-01-01T23:59:59.000Z

40

Modeling and Simulation of Solar Chimney Power Plant with and without the Effect of Thermal Energy Storage Systems.  

E-Print Network (OSTI)

??A solar updraft tower power plant – sometimes also called 'solar chimney' or just ‘solar tower’ – is a solar thermal power plant utilizing a… (more)

Daba, Robera

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "labarge hogsback chimney" 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

Influences of ambient air speed and internal heat load on the performance of solar chimney in the tropics  

Science Journals Connector (OSTI)

Abstract Solar chimney is a combination of solar assisted stack and wind driven ventilation where air in the solar chimney expands under heating from solar irradiance and being relatively lighter, rises out from the chimney outlets, drawing the cooler air into the building through the fenestrations. This pull effect is complemented further by the push effect from the outdoor ambient wind. The study of solar chimney system within the zero energy building in tropical Singapore aims to determine the effects of ambient air speed and internal heat load on the thermal environment of the solar chimney ducts and classroom’s interior. Experimental and computational results show that high ambient air speed greater than 2.00 m/s improves the air speed within the solar chimney ducts; both low and high ambient air speeds are found to improve the classroom’s interior air speed. However, the significance of ambient air speed drops when solar irradiance is greater than 700 W/m2. Furthermore, under the tropical weather conditions of high solar irradiance and low ambient air speed, cross ventilation performs better compared to solar chimney; hence, solar chimney is recommended to be employed under zero ambient air speed. Lastly, results show that the influences of internal heat load on the air temperature and speed within solar chimney ducts as well as classroom’s interior are limited.

Alex Yong Kwang Tan; Nyuk Hien Wong

2014-01-01T23:59:59.000Z

42

Thermo-economic triple-objective optimization of a solar chimney power plant using genetic algorithms  

Science Journals Connector (OSTI)

Abstract A triple-objective design method was developed for a solar chimney power plant system that simultaneously optimizes the expenditure, total efficiency, and power output. A multi-objective genetic algorithm was used to obtain the best combination of geometric parameters of the power plant. The following design parameters were selected: collector radius, chimney height, and chimney diameter. Two different solar chimney power plant configurations were considered: the Kerman pilot power plant and Manzanares prototype power plant. A set of possible optimal solutions (Pareto optimal set) was obtained. Based on the optimal solutions, the best configuration for each power plant was selected. The performance and expenditure of the optimal solutions and the built power plants were compared. The results showed that the increment of the power output was higher than the increment of the expenditure in the optimal configuration. A parametric study was conducted to evaluate the effects of changing design parameters on different objective functions. This paper provides a very useful design and optimization methodology for solar chimney power plant systems.

Ehsan Gholamalizadeh; Man-Hoe Kim

2014-01-01T23:59:59.000Z

43

An experimental investigation of an inclined passive wall solar chimney for natural ventilation  

Science Journals Connector (OSTI)

Abstract Ongoing investigations into solar chimney development have resulted in constantly evolving new designs. In this study, experiments are carried out with an inclined passive wall solar chimney (IPWSC) model with a uniform heat flux on the active (absorptive) wall. The effectiveness of this design has been examined for the heat flux range of 100 W/m2–500 W/m2 with a fixed base air gap width of 0.1 m and inclination angles of the passive wall in the range of 0–6 degrees. The experimental results show that the inclination angle of the passive wall has no significant effect on the temperature distribution across the air gap width and along the chimney height. On the other hand, the averaged air flow velocity across the air gap width is strongly affected by the inclination angle. The experimental results also show that the IPWSC with 0.7 m absorber height and 0.1 m air gap width at an inclination angle of 6° and input heat flux of 500 W/m2 can produce sufficient ventilation for a 27 m3 room based on ASHREA standards. Further, the present experimental results show that the IPWSC design can significantly improve the ventilation performance of a solar chimney in comparison to the conventional chimney design with vertical passive wall configuration. The experimental results are supported by flow visualization experiments and are consistent with scaling predictions.

Rakesh Khanal; Chengwang Lei

2014-01-01T23:59:59.000Z

44

Evaluation of operational control strategies applicable to solar chimney power plants  

SciTech Connect

Numerical simulations are carried out to study the performance of two schemes of power output control applicable to solar chimney power plants. Either the volume flow or the turbine pressure drop is used as independent control variable. Values found in the literature for the optimum ratio of turbine pressure drop to pressure potential vary between 2/3 and 0.97. It is shown that the optimum ratio is not constant during the whole day and it is dependent of the heat transfer coefficients applied to the collector. This study is a contribution towards understanding solar chimney power plant performance and control and may be useful in the design of solar chimney turbines. (author)

Bernardes, Marco Aurelio dos Santos [Department of Mechanical Engineering, Centro Federal de Educacao Tecnologica de Minas Gerais - CEFET-MG, Av. Amazonas, 7675, Nova Gameleira, 30510-000 Belo Horizonte, MG (Brazil); von Backstroem, Theodor W. [Department of Mechanical Engineering, University of Stellenbosch, Private Bag X1, Matieland 7602 (South Africa)

2010-02-15T23:59:59.000Z

45

Optimization of a Solar Chimney Design to Enhance Natural Ventilation in a Multi-Storey Office Building  

E-Print Network (OSTI)

Natural ventilation of buildings can be achieved with solar-driven , buoyancy-induced airflow through a solar chimney channel. Research on solar chimneys has covered a wide range of topics, yet study of the integration in multi-storey buildings has...

Gontikaki, M.; Trcka, M.; Hensen, J.; Hoes, P. J.

2010-01-01T23:59:59.000Z

46

Computational studies on the effect of geometric parameters on the performance of a solar chimney power plant  

Science Journals Connector (OSTI)

Abstract A solar chimney power plant (SCPP) is a renewable-energy power plant that transforms solar energy into electricity. The SCPP consists of three essential elements – solar air collector, chimney tower, and wind turbine(s). The present work is aimed at optimizing the geometry of the major components of the SCPP using a computational fluid dynamics (CFD) software ANSYS-CFX to study and improve the flow characteristics inside the SCPP. The overall chimney height and the collector diameter of the SCPP were kept constant at 10 m and 8 m respectively. The collector inlet opening was varied from 0.05 m to 0.2 m. The collector outlet diameter was also varied from 0.6 m to 1 m. These modified collectors were tested with chimneys of different divergence angles (0°–3°) and also different chimney inlet openings of 0.6 m to 1 m. The diameter of the chimney was also varied from 0.25 m to 0.3 m. Based on the CFX computational results, the best configuration was achieved using the chimney with a divergence angle of 2° and chimney diameter of 0.25 m together with the collector opening of 0.05 m and collector outlet diameter of 1 m. The temperature inside the collector is higher for the lower opening resulting in a higher flow rate and power.

Sandeep K. Patel; Deepak Prasad; M. Rafiuddin Ahmed

2014-01-01T23:59:59.000Z

47

Numerical simulation of airflow in a solar chimney for cooling buildings in the city of Yazd  

Science Journals Connector (OSTI)

This paper investigates numerically a two-dimensional turbulent flow in a solar chimney due to free convectionheat transfer. For evaluation of the fluid flow and heat transfer in the system the basic equations including conservation of mass and momentum in the x y directions and energy in the Cartesian coordinate are converted to the algebraic form using the finite volume method. This simulation (use the commercial CFD code) provides the profile of temperature velocity and mass flow rate variations in the solar chimney in different conditions. These results can be used to evaluate the effective parameters and optimize the performance of the system for natural evaporative cooling and ventilating the buildings. Based on climate conditions in Yazd the optimum dimension of the width of the chimney is 0.3–0.4?m inlet height is 0.3?m and the flow rate created in the system and at the outlet is at 0.18 m3/s. The mean cooling rate resulted from the solar chimney is about 800?W/m2. Considering the long hot and sunny days of summer (about 12?h in Yazd) the use of this system in warm and dry region is recommended. We can save a considerable amount of energy sources such as natural gas or oil and lower CO2 emissions.

Vali Kalantar

2012-01-01T23:59:59.000Z

48

Optimum dimension of geometric parameters of solar chimney power plants – A multi-objective optimization approach  

Science Journals Connector (OSTI)

Abstract In this communication, a multi-objective optimization method is implemented using evolutionary algorithm techniques in order to determine optimum configuration of solar chimney power plant. The two objective functions which are simultaneously considered in the analysis are power output and capital cost of the plant. Power output of the system is maximized while capital cost of the component is minimized. Design parameters of the considered plant include collector diameter (Dcoll), chimney height (Hch) and chimney diameter (Dch). The results of optimal designs are obtained as a set of multiple optimum solutions, called ‘the Pareto frontier’. For some sample points of Pareto, optimal geometric is presented. In addition, effect of changing design variables on both objective functions is performed. This multi-objective optimization approach is very helpful and effective for selecting optimal geometric parameters of solar chimney power plants. The results show that, power output of the plant increases linearly when solar irradiation increases and increase in ambient temperature causes slight decrease in power output of the plant.

Saeed Dehghani; Amir H. Mohammadi

2014-01-01T23:59:59.000Z

49

Experimental Performance of a Solar Collector in Solar Chimney Power Plant System  

Science Journals Connector (OSTI)

Solar chimney power plant has been proposed as a device to economically generate electricity from solar energy in large scale in the future. There are many factors to influence on the performance of the solar collector. This paper describes details of ... Keywords: generate electricity, thermal storage material, pebbles, solar collector

Huilan Huang; Gang Li; Hua Zhang

2010-06-01T23:59:59.000Z

50

Abundances of Hyperthermophilic Autotrophic Fe(III) Oxide Reducers and Heterotrophs in Hydrothermal Sulfide Chimneys of the Northeastern Pacific Ocean  

Science Journals Connector (OSTI)

...Sulfide Chimneys of the Northeastern Pacific Ocean Published ahead of print on 31...Fuca Ridge in the northeastern Pacific Ocean (see Fig. S1 in the supplemental...three sites in the northeastern Pacific Ocean. FEMS Microbiol. Ecol. 36...

Helene C. Ver Eecke; Deborah S. Kelley; James F. Holden

2008-10-31T23:59:59.000Z

51

Numerical simulation of an innovated building cooling system with combination of solar chimney and water spraying system  

Science Journals Connector (OSTI)

In this study, passive cooling of a room using a solar chimney and water spraying system in the room ... a hot and arid city with very high solar radiation). The performance of this system ... some parameters suc...

Ramin Rabani; Ahmadreza K. Faghih; Mehrdad Rabani; Mehran Rabani

2014-11-01T23:59:59.000Z

52

A parametric study on the feasibility of solar chimney power plants in North Cyprus conditions  

Science Journals Connector (OSTI)

Abstract The present work investigates the feasibility of installing a solar chimney power plant (SCPP) under North Cyprus (NC) conditions. The method utilized for the simulations of electricity production was compared and verified by the experimental recordings of the prototype in Manzanares, Spain, before carrying out performance predictions for different plant sizes, collector diameters and chimney heights. The annual electricity production of a 30 MW hypothetical SCPP system is estimated to be 94.5 GW h, which can cater for annual electricity needs of over 22,128 residences without any CO2, \\{NOx\\} and \\{SOx\\} emissions. For an installation cost of €145 million, it was estimated that the savings-to-investment ratio (SIR) would be 1.14, indicating a marginal economic feasibility. It is important to find ways of reducing the installation cost in order to strengthen the economic viability of the system. Considering that, at present, fuel oil no. 6 is being used in NC to produce electricity; the SCPP would cause avoidance of 24,840 tonnes of CO2 delivered into the atmosphere annually, if it replaced an equivalently-sized conventional power unit. To identify the most feasible cost option for the installation of the SCPP, a parametric cost analysis is carried out by varying the parameters such as; capital investment costs, carbon dioxide emission trading system price, chimney height, collector diameter and SCPP plant capacity. In all cases, the effect of these parameters on the economic feasibility indicators, such as SIR, net present value (NPV) and internal rate of return (IRR) were calculated. The results showed that SCPP investment cost, capacity of the plant and chimney height are critical in assessing the project viability.

Chiemeka Onyeka Okoye; U?ur Atikol

2014-01-01T23:59:59.000Z

53

Annual performance analysis of the solar chimney power plant in Sinkiang, China  

Science Journals Connector (OSTI)

Abstract To obtain more accurate prediction of the annual performance of solar chimney power plants (SCPPs), a comprehensive theoretical model is developed by taking into account the hourly variation of solar radiation. The effects of the collector and chimney radii on the power output of the SCPP are analyzed, and the results reveal that a limitation on the maximum collector radius exists for the maximum attainable power output of the SCPP. Then four designs of 100 MW \\{SCPPs\\} with different combinations of collector and chimney radii are proposed and the most cost effective one is chosen from among the four SCPPs. The annual power output of the chosen SCPP in the Hami region is estimated at an interval of 1 h for a whole year. The results indicate that the power generation of SCPP presents obvious seasonal variation. Furthermore, the use of 14% of the unused land in the Hami region for the installation of \\{SCPPs\\} would satisfy the annual power requirement for the whole of the Sinkiang region.

Peng-hua Guo; Jing-yin Li; Yuan Wang

2014-01-01T23:59:59.000Z

54

Analysis of the heat transfer and airflow in solar chimney drying system with porous absorber  

Science Journals Connector (OSTI)

Abstract In this paper, the chimney is assembled with porous absorber for the indirect-mode solar dryer. Local thermal non-equilibrium (LTNE) exists in the porous absorber, so the double energy equations and Brinkman–Forchheimer extended Darcy model are employed to analyze the heat transfer and flow in the solar porous absorber, and the k-? turbulent model coupled with the above equations are also used to investigate the influences of the porous absorber inclination and the height of drying system on the heat transfer in the solar dryer. The specific heat capacities (?c) and thermal conductivity ks have remarkable effects on the average temperature of solar porous absorber in the drying system. The mean temperature of the higher (?c) Aluminous solar absorber is lower and the top temperature of porous absorber delays due to lower thermal conductivity ks. The inclined angle of porous absorber influences the airflow and temperature field in the solar dryer greatly. With the height of solar dryer changing from 1.41 m to 1.81 m, the higher airflow velocity and the lower temperature at chimney exit can be achieved. The simulations agree with the published experimental data. All these results should be taken into account for the promotion and application of the solar chimney dryer with porous absorber.

Wei Chen; Man Qu

2014-01-01T23:59:59.000Z

55

Numerical analysis of the optimal turbine pressure drop ratio in a solar chimney power plant  

Science Journals Connector (OSTI)

Abstract In a solar chimney power plant, only a fraction of the available total pressure difference can be used to run the turbine to generate electrical power. The optimal ratio of the turbine pressure drop to the available total pressure difference in a solar chimney system is investigated using theoretical analysis and 3D numerical simulations. The values found in the literature for the optimal ratio vary between 2/3 and 0.97. In this study, however, the optimal ratio was found to vary with the intensity of solar radiation, and to be around 0.9 for the Spanish prototype. In addition, the optimal ratios obtained from the analytical approach are close to those from the numerical simulation and their differences are mainly caused by the neglect of aerodynamic losses associated with skin friction, flow separation, and secondary flow in the theoretical analysis. This study may be useful for the preliminary estimation of power plant performance and the power-regulating strategy option for solar chimney turbines.

Penghua Guo; Jingyin Li; Yuan Wang; Yingwen Liu

2013-01-01T23:59:59.000Z

56

Thermo-fluid Aspect Analysis of Passive Cooling System Case Using Solar Chimney in the South Regions of Algeria  

Science Journals Connector (OSTI)

Abstract The purpose of this present work is related to thermo-fluid flow and energy performance aspect analysis of solar chimneys versus geometrical parameters and environmental sites. Governing equations are solved numerically using finite volume method. Adrar site located at the south western region of Algeria is chosen according to its important energy potential compared to other regions of Algeria. Obtained results are related to fluid flow temperature and velocity distributions along the chimney, the mass flow rate and air change per hour (ACH). A good agreement is obtained between our results and those of the literature.

Salah Larbi; Adel El Hella

2013-01-01T23:59:59.000Z

57

Energy and exergy analysis of the airflow inside a solar chimney  

Science Journals Connector (OSTI)

Abstract Sustainable development is closely associated with the use of renewable energy resources. In order to achieve a viable development, from an environmental point of view, the energy efficiencies of processes can be increased using renewable energy resources. There is also a correlation between exergy and sustainable development, since exergy is consumed or destroyed due to irreversibilities. The solar chimney has been highlighted in studies of using solar energy to generate electric power. In this paper, the energy and exergy analyses of the airflow inside a solar chimney are presented. Using experimental data obtained in a prototype, the first and second laws of thermodynamics were used to estimate the amounts of energy and exergy lost to the surroundings and the exergetic efficiency. The dead state was defined using two different reference temperatures. The results show that the exergy losses were lower and the efficiency was higher for the lowest ambient temperature used as the dead state temperature, when compared to the instantaneous ambient temperature.

C.B. Maia; J.O. Castro Silva; L. Cabezas-Gómez; S.M. Hanriot; A.G. Ferreira

2013-01-01T23:59:59.000Z

58

Design and simulation of a geothermal–solar combined chimney power plant  

Science Journals Connector (OSTI)

Abstract The solar chimney power plant (SCPP) is dominated by the solar radiation, and therefore its discontinuous operation is an unavoidable problem. In this paper, low temperature geothermal water is introduced into the SCPP for overcoming this problem. Based on a developed transient model, theoretical analyses are carried out to investigate the performance of the geothermal–solar chimney power plant (GSCPP) with main dimensions the same as the Manzanares prototype in Spain. Three operation models, viz. the full solar model, the full geothermal model and the geothermal–solar combined model are compared in typical summer and winter days and throughout the year. It is found that the GSCPP can attractively run in the GSM to deliver power continuously. Due to the ambient-dependant geothermal water outlet temperature, introducing the geothermal water makes greater contribution in winter days than in summer days, in the night than in the daytime. Power generation under GSM is larger than the sum of FSM and FGM. GSM is not the simple superposition of FSM and FGM, but makes better utilization of solar and geothermal energy. In addition, introducing high temperature and mass flow rate geothermal water can doubled and redoubled improve the GSCPP’s power capacity.

Fei Cao; Huashan Li; Qiuming Ma; Liang Zhao

2014-01-01T23:59:59.000Z

59

Numerical study on thermal behaviors of a solar chimney incorporated with PCM  

Science Journals Connector (OSTI)

Abstract The thermal behaviors of a solar chimney incorporating with organic phase change material (PCM) RT-42 unit under different heat fluxes are studied in this paper. For the numerical model, effective heat capacity method is employed to analyze the performance of RT-42, while the average thermo-physical property approach is used to describe the PCM/fins component. The PCM behaviors during its melting and solidification processes, absorber surface temperature, mass flow rate, and inlet and outlet air temperature difference have been investigated. The numerical results give good agreements with the experimental results. The comprehensive investigations under various heat fluxes from 100 to 800 W/m2 are carried out by using the verified model. The numerical results show that the performance of the system deteriorates sharply once the heat flux is or lower than 500 W/m2, but not big improvement if the heat flux is higher than 700 W/m2. Therefore, the performance of the system is highly dependent on the solar radiation. The application of high effective thermal conductivity enhancers can further improve the performance of the chimney under lower solar radiation.

Yongcai Li; Shuli Liu

2014-01-01T23:59:59.000Z

60

A scaling investigation of the laminar convective flow in a solar chimney for natural ventilation  

Science Journals Connector (OSTI)

Abstract The flow behavior due to natural convection of air (with a Prandtl number less than 1) inside a solar chimney with an imposed heat flux on a vertical absorber wall is investigated by a scaling analysis and a corresponding numerical simulation. Three distinct flow regimes are identified, one with a distinct thermal boundary layer and the other two without a distinct thermal boundary layer, depending on the Rayleigh number. The two regimes without a distinct thermal boundary layer are further classified into low and medium Rayleigh number sub-regimes respectively. These sub-regimes are characterized by conduction dominance in which the thermal boundary layer grows to encompass the entire width of the channel before convection becomes important. Flow development in each of these flow regimes and sub-regimes is characterized through transient scaling, and scaling correlations are developed to describe the temperature, flow velocity and mass flow rate, which characterize the ventilation performance of the solar chimney. The scaling arguments are validated by the corresponding numerical data.

Rakesh Khanal; Chengwang Lei

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "labarge hogsback chimney" from the National Library of EnergyBeta (NLEBeta).
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61

Influence of geometric parameters on the hydrodynamics control of solar chimney  

Science Journals Connector (OSTI)

Abstract Hydrogen generating station (HGS) by water electrolysis is based on three principal compartments: hydraulic pumping system, water electrolysis process and energy supply whose can be free source like solar chimney power plans (SCPP). The HGS can be controlled if governed one of these three compartments especially the energy supply SCPP. The aim of this study is to investigate numerically the airflow behavior through a Solar Chimney. The transport equations that describe the flow, for different geometric tower parameters were modeled and solved numerically using the finite volume method. This methodology allows us a detailed visualization of the effects of some geometrical parameters such as the tower height and tower radius. It has been shown in this work that the dimensions of the tower play an important role in designing of such systems by increasing or decreasing the mass flow rate. Consequently, the hydrodynamic field is directly controlled by varying the tower dimensions. However the thermal field is indirectly controlled by decreasing the system mean temperature.

M. Lebbi; T. Chergui; H. Boualit; I. Boutina

2014-01-01T23:59:59.000Z

62

Thermal Safety of the Current Buses inthe Chimney of the D0 Solenoid  

SciTech Connect

The thermal and electrical behaviour of the current buses in the chimney of the D0 solenoid during upset conditions is modeled to guide the selection of trip levels for magnet protection circuits which discharge the magnet if abnormal conditions are detected. The current buses in the chimney are designed to operate safely without likelihood of loss of superconductivity as long as normal cooling conditions are maintained. Helium liquid level probes, helium flow instrumentation, and thermometry all are provided to certify that proper cooling conditions exist in the subcooler and chimney at all times. Rising temperatures in any portion of the system, excessive voltage drops on the vapor cooled leads, or decreasing liquid level in the subcooler or flow rate in the system, will each cause the fast discharge system to be triggered. Postulated failures of the helium flow system, somehow undetected by any and all of the aforementioned instrumentation, can in principal eventually lead to loss of superconductivity in the buses. Quenching in one bus will rapidly lead to quenching in the other. Potential taps on the buses and magnet coil halves connected to voltage-detection bridges external to the system provide at least dually redundant signals which will unambiguously trigger the magnet rapid discharge system. The conservative design of the bus system ensures that it will not be damaged during such incidents, however improbable they may be. The transition leads in the subcooler are equally conservatively designed, and would not be damaged if they were operated in a fully non-superconducting state for several minutes. The loss of liquid helium in the sub cooler required to cause this condition would imply that helium flow from the magnet had stopped, which in turn would imply that flow to the magnet had also stopped. The lack of flow into the sub cooler would result in insufficient flow to the vapor cooled leads. Any or all of these conditions would be detected, as would easily detected spurious voltages on the potential tap system, before damage to the transition leads occurred.

Smith, R.P.; /Fermilab

1998-01-20T23:59:59.000Z

63

D0 Solenoid Upgrade Project: Chimney LN2 Radiation Shield Attachment Area Calculation  

SciTech Connect

A short calculation was done to check the attachment method of the radiation shield to it's LN2 cooling tubes. The case considered was only for the obround chimney section. The proposed attachment method was to use 1/8-inch plug welds spaced every 5-inch along the length of the shield. The calculations were done conservatively for 6-inch spacing between plug welds. The criteria used was that the LN2 shield warmest temperature be less than 2 K above the temperature of the LN2 fluid. Using a very conservative heat transfer model. the calculations predict that the warmest temperature on the radiation shield will be < 1.4 K warmer than the LN2 fluid temperature.

Rucinski, R.; /Fermilab

1993-05-26T23:59:59.000Z

64

A cost-benefit analysis of power generation from commercial reinforced concrete solar chimney power plant  

Science Journals Connector (OSTI)

Abstract This paper develops a model different from existing models to analyze the cost and benefit of a reinforced concrete solar chimney power plant (RCSCPP) built in northwest China. Based on the model and some assumptions for values of parameters, this work calculates total net present value (TNPV) and the minimum electricity price in each phase by dividing the whole service period into four phases. The results show that the minimum electricity price in the first phase is higher than the current market price of electricity, but the minimum prices in the other phases are far less than the current market price. The analysis indicates that huge advantages of the RCSCPP over coal-fired power plants can be embodied in phases 2–4. In addition, the sensitivity analysis performed in this paper discovers TNPV is very sensitive to changes in the solar electricity price and inflation rate, but responds only slightly to changes in carbon credits price, income tax rate and interest rate of loans. Our analysis predicts that \\{RCSCPPs\\} have very good application prospect. To encourage the development of RCSCPPs, the government should provide subsidy by setting higher electricity price in the first phase, then lower electricity price in the other phases.

Weibing Li; Ping Wei; Xinping Zhou

2014-01-01T23:59:59.000Z

65

Design and simulation of the solar chimney power plants with TRNSYS  

Science Journals Connector (OSTI)

Abstract The solar chimney power plant (SCPP) is a promising technology for the large-scale utilization of solar energy. Due to the significant difference of weather conditions, the performance of \\{SCPPs\\} varies from one place to another, and thus specific design work is required for different regions. In addition, little effort has been carried out to evaluate the \\{SCPPs\\} both simply and precisely. In view of this, a program based on TRNSYS is built to simulate the performance of \\{SCPPs\\} in this paper. With the program, the major meteorological parameter that influences the SCPP performance is identified. Also, the configuration size design and techno-economic analysis of commercial \\{SCPPs\\} are carried out for locations not included in TRNSYS database. It is found that the SCPP power generation is more relevant to the local solar irradiation than to the ambient temperature. The SCPP with higher generation capacity holds better cost-benefit characteristics. It is believed that the TRNSYS program can be used as a convenient tool for SCPP investigation.

Fei Cao; Huashan Li; Liang Zhao; Tianyang Bao; Liejin Guo

2013-01-01T23:59:59.000Z

66

Examining potential benefits of combining a chimney with a salinity gradient solar pond for production of power in salt affected areas  

Science Journals Connector (OSTI)

The concept of combining a salinity gradient solar pond with a chimney to produce power in salt affected areas is examined. Firstly the causes of salinity in salt affected areas of northern Victoria, Australia are discussed. Existing salinity mitigation schemes are introduced and the integration of solar ponds with those schemes is discussed. Later it is shown how a solar pond can be combined with a chimney incorporating an air turbine for the production of power. Following the introduction of this concept the preliminary design is presented for a demonstration power plant incorporating a solar pond of area 6 hectares and depth 3 m with a 200 m tall chimney of 10 m diameter. The performance, including output power and efficiency of the proposed plant operating in northern Victoria is analysed and the results are discussed. The paper also discusses the overall advantages of using a solar pond with a chimney for production of power including the use of the large thermal mass of a solar pond as a practical and efficient method of storing collected solar energy.

Aliakbar Akbarzadeh; Peter Johnson; Randeep Singh

2009-01-01T23:59:59.000Z

67

Three-dimensional CFD analysis for simulating the greenhouse effect in solar chimney power plants using a two-band radiation model  

Science Journals Connector (OSTI)

Abstract The greenhouse effect in the solar collector has a fundamental role to produce the upward buoyancy force in solar chimney power plant systems. This study underlines the importance of the greenhouse effect on the buoyancy-driven flow and heat transfer characteristics through the system. For this purpose, a three-dimensional unsteady model with the RNG k–? turbulence closure was developed, using computational fluid dynamics techniques. In this model, to solve the radiative transfer equation the discrete ordinates (DO) radiation model was implemented, using a two-band radiation model. To simulate radiation effects from the sun's rays, the solar ray tracing algorithm was coupled to the calculation via a source term in the energy equation. Simulations were carried out for a system with the geometry parameters of the Manzanares power plant. The effects of the solar insolation and pressure drop across the turbine on the flow and heat transfer of the system were considered. Based on the numerical results, temperature profile of the ground surface, thermal collector efficiency and power output were calculated and the results were validated by comparing with experimental data of this prototype power plant. Furthermore, enthalpy rise through the collector and energy loss from the chimney outlet between 1-band and two-band radiation model were compared. The analysis showed that simulating the greenhouse effect has an important role to accurately predict the characteristics of the flow and heat transfer in solar chimney power plant systems.

Ehsan Gholamalizadeh; Man-Hoe Kim

2014-01-01T23:59:59.000Z

68

Electronic structure of the Nowotny chimney-ladder silicide Ru{sub 2}Si{sub 3}  

SciTech Connect

We report {ital ab initio} calculations for the electronic structure of the Nowotny chimney-ladder silicide Ru{sub 2}Si{sub 3} in the orthorhombic low-temperature phase. We find Ru{sub 2}Si{sub 3} to be a semiconductor with a direct band gap of about 0.45 eV. Since this gap is a p-d gap, the oscillator strength for a direct transition is expected to be of sizable magnitude. Also, the calculated effective masses of hole and electron states suggest that Ru{sub 2}Si{sub 3} is a very promising material for various applications in semiconductor technology. The electronic structure is controlled by the hybridization of Si p states with Ru d states and shows similarities to the group-IV transition-metal disilicides (CrSi{sub 2}, MoSi{sub 2}, WSi{sub 2}) and to transition-metal-rich silicides. The calculations are based on the density-functional theory in local-density approximation and are performed by means of the full-potential linearized-augmented-plane-wave method. {copyright} {ital 1997} {ital The American Physical Society}

Wolf, W. [Institut fuer Physikalische Chemie der Universitaet Wien, Liechtensteinstrae 22a, A-1090 Wien (Austria)] [Institut fuer Physikalische Chemie der Universitaet Wien, Liechtensteinstrae 22a, A-1090 Wien (Austria); Bihlmayer, G.; Bluegel, S. [Institut fuer Festkoerperforschung, Forschungszentrum Juelich, D-52425 Juelich (Germany)] [Institut fuer Festkoerperforschung, Forschungszentrum Juelich, D-52425 Juelich (Germany)

1997-03-01T23:59:59.000Z

69

In situ ore formation experiment: Amino acids and amino sugars trapped in artificial chimneys on deep-sea hydrothermal systems at Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean  

E-Print Network (OSTI)

The present study reports on the bio-organic composition of a deep-sea venting hydrothermal system originating from arc volcanism; the origin of the particulates in hydrothermal fluids from the Suiyo Seamount in the southern Izu-Bonin (Ogasawara) Arc is discussed with regard to amino compounds. Chimney samples on deep-sea hydrothermal systems and core samples at Suiyo Seamount were determined for amino acids, and occasionally amino sugars. Two types of chimney samples were obtained from active hydrothermal systems by submersible vehicles: one was natural chimney (NC) on a hydrothermal natural vent; the other was artificial chimneys (AC), mainly formed by the growth and deposition of sulfide-rich particulate components in a Kuwabara-type in situ incubator (KI incubator). Total hydrolyzed amino acids (THAA) and hydrolyzed hexosamines (HA) in AC ranged from 10.7 nmol/g to 64.0 nmol/g and from 0 nmol/g to 8.1 nmol/g, respectively, while THAA in hydrothermally altered core samples ranged from 26.0 nmol/g to 107.4 ...

Takano,; Marumo,; K.,; Ebashi,; T.,; Gupta,; P., L; Kawahata,; H.,; Kobayashi,; K.,; Yamagishi,; A.,; Kuwabara,; T,

2013-01-01T23:59:59.000Z

70

From turbo-machines to solar chimneys.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: This dissertation is basically a summary, with some interpretation, of published research by the author. The scope is limited to the fields of… (more)

Von Backstrom, Theodor W.

2012-01-01T23:59:59.000Z

71

Chimneys: Keep 'em Clean... and Closed | Department of Energy  

Energy Savers (EERE)

it's also one other thing: a great big hole going to the outdoors. Many families have glass doors across their fireplaces. That's a good start, but there's something else you...

72

BR UFF BIG PINEY WILD ROSE BLU E GAP BR UFF UNIT WAMSUT TER  

Annual Energy Outlook 2012 (EIA)

Morehouse (2), Jack Perrin (1), Steve Jackson (1) and Robert King (2) (1) Z, Inc., (2) Energy Information Administration BIG PINEY TIP TOP BIR D CANYON SWAN FONTEN ELL E LABARGE...

73

When Her Thousand Chimneys Smoked: Virginia's Enslaved Cooks and Their Kitchens  

E-Print Network (OSTI)

Identity ed. Charles Orser Jr. (Salt Lake City: UniversityCharles. Race and the Archaeology of Identity. Salt Lake City:

Deetz, Kelley

2010-01-01T23:59:59.000Z

74

When Her Thousand Chimneys Smoked: Virginia's Enslaved Cooks and Their Kitchens  

E-Print Network (OSTI)

they had access to poison, food and trust; the idealThe idea of poisoning goes hand-in-hand with food productionfood. Similarly, in April of 1849 an enslaved man named Billy was charged with poisoning

Deetz, Kelley

2010-01-01T23:59:59.000Z

75

Chimneys: Warm and Cozy or Easy Exit for Your Heat? | Department...  

Energy Savers (EERE)

fire isn't burning. Visit the Stay Warm, Save Money site for other ways you can reduce heat loss from the fireplace. Addthis Related Articles A warm fireplace can save you...

76

Handling Temperature Bursts Reaching 464°C: Different Microbial Strategies in the Sisters Peak Hydrothermal Chimney  

Science Journals Connector (OSTI)

...exist and include efficient repair systems, reverse gyrase...include a high degree of mismatch repair and homologous recombination...overview of the upstream analysis pipeline is available in Fig. S1A in...of the downstream analysis pipeline is available in Fig. S1B in...

Mirjam Perner; Giorgio Gonnella; Stefan Kurtz; Julie LaRoche

2014-05-16T23:59:59.000Z

77

A Chimney of Low Height to Diameter Ratio for Solar Crops Dryer  

Science Journals Connector (OSTI)

Sabah, Malaysia is rich with solar energy where the daily mean daylight is ... sunlight can be used effectively in a suitable solar crops drying system. Solar crops dryer with mechanical system is an ... Mechanic...

S. Kumaresan; M. M. Rahman; C. M. Chu…

2013-01-01T23:59:59.000Z

78

A CONCEPTUAL SOLAR CHIMNEY PLANT AND FLORAL FARM USING ETFE AND BAMBOO.  

E-Print Network (OSTI)

??Motivated by a desire to create an architectural response to the environmental and social challenges of today, the following thesis project attempts to offer new… (more)

DE VITA, NIELS

2013-01-01T23:59:59.000Z

79

Development of an Ultra-Wideband Radar System for Vehicle Detection at Railway Crossings  

E-Print Network (OSTI)

Development of an Ultra-Wideband Radar System for Vehicle Detection at Railway Crossings Stephen P-wideband (UWB) radar system designed to detect motor vehicles such as cars and trucks when they are present was supported in part by LaBarge, Inc. down. A sensing system that can detect the presence of a vehicle

Kansas, University of

80

Design of double skin (envelope) as a solar chimney: adapting natural ventilation in double envelope for mild or warm climates.  

E-Print Network (OSTI)

??In United States, space heating, space cooling and ventilation of buildings consume 33% of the annual building energy consumption and 15% of the total annual… (more)

Wang, Lutao

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "labarge hogsback chimney" 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

Parametric investigation of solar chimney with new cooling tower integrated in a single room for New Assiut city, Egypt climate  

Science Journals Connector (OSTI)

Houses in Egypt are often designed without taking the climate into account sufficiently. Consequently, new houses often have a poor indoor climate, which affects comfort, health and building efficiency. In hot an...

Amr Sayed Hassan Abdallah; Yoshino Hiroshi…

2014-07-01T23:59:59.000Z

82

AN EVALUATION OF SOLAR VALUATION METHODS USED IN UTILITY PLANNING AND PROCUREMENT PROCESSES  

E-Print Network (OSTI)

LSE considered a solar chimney, and another LSE considered aTrough Trough Power tower Solar chimney Natural gas firingcredit for PV and a solar chimney. Capacity credit for APS

Mills, Andrew D.

2014-01-01T23:59:59.000Z

83

Solar Thermal Power Generation and Industrial Process Heat  

Science Journals Connector (OSTI)

A solar chimney power plant consists of a transparent tubular chimney over 200 m tall rising from a...2 covered with a transparent material (Haaf et al. 1983). At the base of the chimney is located a turbine driv...

Brian Norton

2014-01-01T23:59:59.000Z

84

Development of a Residential Integrated Ventilation Controller  

E-Print Network (OSTI)

M. , Charvat, K. 2004. “Solar Chimneys for ResidentialStudy of Performance of Solar Chimney with Air-conditionedM.S. 1994. “A Study of Solar Chimney Assisted Wind Towed

Walker, Iain

2013-01-01T23:59:59.000Z

85

High-performance commercial building facades  

E-Print Network (OSTI)

Nottingham, UK System: Solar chimney stack-induced cross-For all-glass facades, solar chimneys are essentially thethe same principle as a solar chimney but can serve more

Lee, Eleanor; Selkowitz, Stephen; Bazjanac, Vladimir; Inkarojrit, Vorapat; Kohler, Christian

2002-01-01T23:59:59.000Z

86

Operation and Maintenance Methods in Solar Power Plants  

Science Journals Connector (OSTI)

A solar chimney power plant has a high chimney (tower), with a height of up ... , the roof curves upward to join the chimney, creating a funnel. The sun heats ... is absorbed by the water within the dark solar pa...

Mustapha Hatti

2014-01-01T23:59:59.000Z

87

Complete genome sequence of the aerobic, heterotroph Marinithermus hydrothermalis type strain (T1T) from a deep-sea hydrothermal vent chimney  

SciTech Connect

Marinithermus hydrothermalis Sako et al. 2003 is the type species of the monotypic genus Marinithermus. M. hydrothermalis T1 T was the first isolate within the phylum ThermusDeinococcus to exhibit optimal growth under a salinity equivalent to that of sea water and to have an absolute requirement for NaCl for growth. M. hydrothermalis T1 T is of interest because it may provide a new insight into the ecological significance of the aerobic, thermophilic decomposers in the circulation of organic compounds in deep-sea hydrothermal vent ecosystems. This is the first completed genome sequence of a member of the genus Marinithermus and the seventh sequence from the family Thermaceae. Here we describe the features of this organism, together with the complete genome sequence and annotation. The 2,269,167 bp long genome with its 2,251 protein-coding and 59 RNA genes is a part of the Genomic Encyclopedia of Bacteria and Archaea project.

Copeland, A [U.S. Department of Energy, Joint Genome Institute; Gu, Wei [U.S. Department of Energy, Joint Genome Institute; Yasawong, Montri [HZI - Helmholtz Centre for Infection Research, Braunschweig, Germany; Lapidus, Alla L. [U.S. Department of Energy, Joint Genome Institute; Lucas, Susan [U.S. Department of Energy, Joint Genome Institute; Deshpande, Shweta [U.S. Department of Energy, Joint Genome Institute; Pagani, Ioanna [U.S. Department of Energy, Joint Genome Institute; Tapia, Roxanne [Los Alamos National Laboratory (LANL); Cheng, Jan-Fang [U.S. Department of Energy, Joint Genome Institute; Goodwin, Lynne A. [Los Alamos National Laboratory (LANL); Pitluck, Sam [U.S. Department of Energy, Joint Genome Institute; Liolios, Konstantinos [U.S. Department of Energy, Joint Genome Institute; Ivanova, N [U.S. Department of Energy, Joint Genome Institute; Mavromatis, K [U.S. Department of Energy, Joint Genome Institute; Mikhailova, Natalia [U.S. Department of Energy, Joint Genome Institute; Pati, Amrita [U.S. Department of Energy, Joint Genome Institute; Chen, Amy [U.S. Department of Energy, Joint Genome Institute; Palaniappan, Krishna [U.S. Department of Energy, Joint Genome Institute; Land, Miriam L [ORNL; Pan, Chongle [ORNL; Brambilla, Evelyne-Marie [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Rohde, Manfred [HZI - Helmholtz Centre for Infection Research, Braunschweig, Germany; Tindall, Brian [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Sikorski, Johannes [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Goker, Markus [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Detter, J. Chris [U.S. Department of Energy, Joint Genome Institute; Bristow, James [U.S. Department of Energy, Joint Genome Institute; Eisen, Jonathan [U.S. Department of Energy, Joint Genome Institute; Markowitz, Victor [U.S. Department of Energy, Joint Genome Institute; Hugenholtz, Philip [U.S. Department of Energy, Joint Genome Institute; Kyrpides, Nikos C [U.S. Department of Energy, Joint Genome Institute; Klenk, Hans-Peter [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Woyke, Tanja [U.S. Department of Energy, Joint Genome Institute

2012-01-01T23:59:59.000Z

88

A study of the operating conditions and power performance characteristics of power units upon increasing the cooling capacity of their chimney-type cooling towers  

Science Journals Connector (OSTI)

The operating conditions and power performance characteristics of the Armenian nuclear power station’s Unit 2 equipped with a ... 4.3 turbine and of the Razdan district power station’s units equipped with K-200- ...

A. K. Muradyan; D. T. Arshakyan

2007-11-01T23:59:59.000Z

89

26.1 / M. Doshi 26.1: Low-Frequency Square-Wave Drive for Large Screen LCD-TV  

E-Print Network (OSTI)

output current PSD to fit within designated FCC chimneys. Index Terms--Electromagnetic interference (EMI

90

Dynamics and optimal control of flexible solar updraft towers  

Science Journals Connector (OSTI)

...control of flexible solar updraft towers...University of New Mexico, , Albuquerque...USA The use of solar chimneys for energy production was...a) Potential energy as a function of...University of New Mexico solar chimney prototype...

2015-01-01T23:59:59.000Z

91

Fuel cell with internal flow control  

SciTech Connect

A fuel cell stack is provided with a plurality of fuel cell cassettes where each fuel cell cassette has a fuel cell with an anode and cathode. The fuel cell stack includes an anode supply chimney for supplying fuel to the anode of each fuel cell cassette, an anode return chimney for removing anode exhaust from the anode of each fuel cell cassette, a cathode supply chimney for supplying oxidant to the cathode of each fuel cell cassette, and a cathode return chimney for removing cathode exhaust from the cathode of each fuel cell cassette. A first fuel cell cassette includes a flow control member disposed between the anode supply chimney and the anode return chimney or between the cathode supply chimney and the cathode return chimney such that the flow control member provides a flow restriction different from at least one other fuel cell cassettes.

Haltiner, Jr., Karl J. (Fairport, NY); Venkiteswaran, Arun (Karnataka, IN)

2012-06-12T23:59:59.000Z

92

Microsoft PowerPoint - Mod 10d - RCCS - final.ppt [Compatibility...  

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

considered during design 12 during design NP-MHTGR RCCS Concept * Water loop in cavity * Heat pipes transfer heat to air in chimney chimney * Redundant loops * All natural * All...

93

Temporal Changes in Archaeal Diversity and Chemistry in a Mid-Ocean Ridge Subseafloor Habitat  

Science Journals Connector (OSTI)

...cycle of a hypersaline stratified lake (Solar Lake, Sinai, Egypt). Appl. Environ...microorganisms in deep-sea hydrothermal vent chimneys investigated by whole-cell hybridization...Distribution of archaea in a black smoker chimney structure. Appl. Environ. Microbiol...

Julie A. Huber; David A. Butterfield; John A. Baross

2002-04-01T23:59:59.000Z

94

Conjugate heat transfer in enclosures with openings for ventilation  

Science Journals Connector (OSTI)

The direct and indirect solar chimney principle has been used for heating of...12...]). In heating applications, for example, the dwelling is simulated as an enclosure having a solar chimney located towards the s...

E. Bilgen; T. Yamane

2004-03-01T23:59:59.000Z

95

Metagenome Survey of a Multispecies and Alga-Associated Biofilm Revealed Key Elements of Bacterial-Algal Interactions in Photobioreactors  

Science Journals Connector (OSTI)

...metagenomes of hydrothermal vent chimneys, biofilms on concrete...microalgal cultures using solar tracked photobioreactors...metagenome of a hydrothermal chimney biofilm. ISME J. 3...Photobioreactors mounted on a solar tracker and flow chart...

Ines Krohn-Molt; Bernd Wemheuer; Malik Alawi; Anja Poehlein; Simon Güllert; Christel Schmeisser; Andreas Pommerening-Röser; Adam Grundhoff; Rolf Daniel; Dieter Hanelt; Wolfgang R. Streit

2013-08-02T23:59:59.000Z

96

Eastgate seen from the south-east, in front of Harare's glass and concrete towers  

E-Print Network (OSTI)

;Roofscapef p · Chimneys for air extract · Solar panels for water heating · Window hoods for sun shielding Gl

Behmer, Spencer T.

97

Experimental Study on Optical Properties of the Collector  

Science Journals Connector (OSTI)

Solar collector is one of the most important parts of solar chimney power plant. It plays an important role...

Wang Juan; Zhao Liang; Li Huashan

2009-01-01T23:59:59.000Z

98

Microbial community in a sediment-hosted CO2 lake of the southern Okinawa Trough hydrothermal system  

Science Journals Connector (OSTI)

...levels of biologically damaging solar UV radiation may be significantly...smoker vents (Tiger and Lion chimneys) (Fig. 1 B), with vent fluid...Yonaguni Knoll IV. (B) “Lion chimney,” one of the most active black...this field. (C) “Crystal chimney,” one of the vapor-rich clear...

Fumio Inagaki; Marcel M. M. Kuypers; Urumu Tsunogai; Jun-ichiro Ishibashi; Ko-ichi Nakamura; Tina Treude; Satoru Ohkubo; Miwako Nakaseama; Kaul Gena; Hitoshi Chiba; Hisako Hirayama; Takuro Nunoura; Ken Takai; Bo B. Jørgensen; Koki Horikoshi; Antje Boetius

2006-01-01T23:59:59.000Z

99

REDUCING MISMATCH LOSSES IN GRID-CONNECTED RESIDENTIAL BIPV ARRAYS USING ACTIVE POWER CONVERSION COMPONENTS  

E-Print Network (OSTI)

occur due to nearby buildings, trees, antennas or chimneys, which are usually inherent to the solar, chimneys or buildings, consequently causing PV module mismatch losses. Such losses are mainly due is carried out through normal operation and two partially shaded scenarios representing chimney and nearby

Paris-Sud XI, Université de

100

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...microbial mat from a carbonate chimney formed at the seafloor in the...Pacific Ocean. (C) Barite chimney at a mud volcano in the Gulf...search for life elsewhere in our solar system and for understanding...extinct hydrothermal sulfide chimney off axis of the East Pacific...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "labarge hogsback chimney" 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

Garion Bienn and Chris Eudaily The Evergreen State College  

E-Print Network (OSTI)

Operability of Solar Chimneys in Cold Environments The Evergreen State College, Olympia Washington 98505 renewable energy is inescapable as climate change is more evident now than ever. A solar chimney possesses that warm weather large scale solar towers (Chimney generates 100 MW) are fully able to produce energy

102

Diversity and Stratification of Archaea in a Hypersaline Microbial Mat  

Science Journals Connector (OSTI)

...pISA48, DHVE6 A Black smoker chimney, Myojin Knoll AB019753 pMC2A35...MOB4-9 Eury4 A Black smoker chimney, Myojin Knoll AB019747 pMC2A17, DHVE4 DVCren A Black smoker chimney, Myojin Knoll AB019718 pMC2A15...diversity of a Tunisian multipond solar saltern. Extremophiles 12...

Charles E. Robertson; John R. Spear; J. Kirk Harris; Norman R. Pace

2008-12-29T23:59:59.000Z

103

Fluid origins, paths, and fluid-rock reactions at convergent margins, using halogens, Cl stable isotopes, and alkali metals as geochemical tracers  

E-Print Network (OSTI)

Carbonate chimneys with brucite, blue amphiboles, phengite,partition coefficients. One brucite sample separated from ahigh ? 37 Cl value in the brucite separate sample probably

Wei, Wei

2007-01-01T23:59:59.000Z

104

Microsoft Word - S11889_Strategy-Final.docx  

Office of Legacy Management (LM)

rubble chimney extended approximately 356 ft above the shot point (Hazleton-Nuclear Science Corporation 1965). The water table beneath the site (near surface ground zero and...

105

http://www.leg.state.nv.us/nac/nac-503.html  

National Nuclear Security Administration (NNSA)

Basin, from Stahl Diversion Dam (near Golconda, Humboldt County) to and including Rye Patch Reservoir, the Pitt-Taylor and Chimney reservoirs, the Humboldt River below Rye Patch...

106

Shallow gas off the Rhone prodelta, Gulf of Lions  

E-Print Network (OSTI)

in press. What controls shallow gas in Western Adriatic Sea?L. , Arntsen, B. , 2003. Gas chimneys – indicating aseismic maping of shallow gas in the Belgian coastal zone.

2006-01-01T23:59:59.000Z

107

[11] 4,275,309  

E-Print Network (OSTI)

May 25, 1979 ... 23, 19811. [54] SYSTEM FOR CONVERTING SOLAR HEAT 675981 11/ 1929 France . .... ordinary industrial draft chimneys. At the base, the.

1979-05-25T23:59:59.000Z

108

Aha Macav Power Service Inc AMPS | Open Energy Information  

Open Energy Info (EERE)

Product: Tribal utility, conducting a pre-feasibility study with Enviromission to build a solar thermal electricity generating chimney. References: Aha Macav Power Service Inc...

109

SolarMission Technologies Inc | Open Energy Information  

Open Energy Info (EERE)

Montana Zip: 59801 Sector: Solar Product: US-based company that owns a licence to solar chimney technology; also manufactures and installs. References: SolarMission...

110

Bradley J. Lucier  

E-Print Network (OSTI)

The government of Australia is paying Enviromission a billion Australian dollars to build the "Solar Chimney", a solar power plant that will provide enough power

111

8, 1091310954, 2008 Separation and  

E-Print Network (OSTI)

) chimney plumes, other coal burning pollution, and relatively clean (background) air for Northern China Introduction Aerosols scatter and absorb shortwave solar radiation, generally resulting in cooling and warming

Paris-Sud XI, Université de

112

E-Print Network 3.0 - air parcel model Sample Search Results  

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

Geosciences ; Environmental Sciences and Ecology 11 Cloud Formation in the Plumes of Solar Chimney Power Generation Facilities: A Modeling Study Summary: to impact cloud...

113

LDRD Program Contacts | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

LDRD Program Contacts LDRD Program Contacts Laboratory Policy and Evaluation (LPE) LPE Home Staff M&O Contracts SC Laboratory Appraisal Process Laboratory Planning Process Work for Others in the Office of Science Laboratory Directed Research and Development (LDRD) DOE's Philosophy on LDRD Frequently Asked Questions Success Stories Brochures Additional Information LDRD Program Contacts Technology Transfer DOE National Laboratories Contact Information Laboratory Policy and Evaluation U.S. Department of Energy SC-32/Forrestal Building 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5447 F: (202) 586-3119 Laboratory Directed Research and Development (LDRD) LDRD Program Contacts Print Text Size: A A A RSS Feeds FeedbackShare Page DOE/NNSA Headquarters Office of Science John LaBarge

114

feb2004.pub  

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

4 4 *Sequestration in the News *Recent Publications *Events and Announcements *Legislative Activity Sequestration in the News T HE CARBON S EQUESTRATION NEWSLETTER http://www.netl.doe.gov/coalpower/sequestration/ ABC News, "US Begins Work on CO2 Storage Project." Anadarko Petroleum Corp. will begin pumping CO2 into an oil reservoir in Wyoming's Salt Creek field starting Feb. 1, 2004. Over a 30 year project life, 25 million tons of injected CO2 are expected to remain sequestered underground. The CO2 is "anthropogenic," that is it is captured from Exxon-Mobil's natu- ral gas plant at LaBarge and transported to the oil field via pipeline. "This week the Wyoming State Geological Survey released a map of about 50 oil fields in the state that would be

115

A:\1FRONT(REVISED).PDF  

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

ACKNOWLEDGMENTS ACKNOWLEDGMENTS Special "Thanks" are given to the many individuals who participated in the multi-disciplinary team from DOE Headquarters and Field Elements. They wrote the chapters or provided insight, input and information arising from their own experiences. It was their valuable expertise which formed the basis for this Reference Book. Sponsor: Richard H. Hopf, Director, Office of Procurement & Assistance Management Lead Office Director: Stephen J. Michelsen, Director, Office of Contract & Resource Management Team Lead: James Tower, Office of Contract & Resource Management Sounding Board Advisors: Donette Cappello, PC-1 Gwendolyn Cowan, MA-51 Leif Erickson, RL Linda Johnson, GC-61 John LaBarge, SC-7 Richard Mehl, FI-10 William C. Meyers, AL

116

Microbe Can Survive at 226 Degrees Page 1 Posted on Thu, Aug. 14, 2003  

E-Print Network (OSTI)

a natural chimney, or smoking vent, in the Juan de Fuca Ridge off the northwest coast of the United States. These chimneys, in about 1 1/2 miles of water, are built up on the ocean floor by superheated water ejected temperatures and pressures also increases the hope that there may be life on other planets in the solar system

Lovley, Derek

117

Selective Phylogenetic Analysis Targeting 16S rRNA Genes of Hyperthermophilic Archaea in the Deep-Subsurface Hot Biosphere  

Science Journals Connector (OSTI)

...surface of the mound and from the top of chimney structures. Prior to sampling, the temperature...fluid (343C) was found at the top of the chimney, the temperature of the shimmering fluid...cycle of a hypersaline stratified lake (Solar Lake, Sinai, Egypt). Appl. Environ...

Hiroyuki Kimura; Jun-Ichiro Ishibashi; Harue Masuda; Kenji Kato; Satoshi Hanada

2007-02-02T23:59:59.000Z

118

Soot climate forcing via snow and ice albedos  

Science Journals Connector (OSTI)

...clean soot,” says Dick Van Dyke as the chimney-sweep in Mary Poppins. Environmentalists...is larger than the product of incident solar flux and the direct BC-induced snow albedo...plays both the decrepit banker and the chimney-sweep in Mary Poppins, so ignominiously...

James Hansen; Larissa Nazarenko

2004-01-01T23:59:59.000Z

119

A novel microbial habitat in the mid-ocean ridge subseafloor  

Science Journals Connector (OSTI)

...Earth dumps its waste heat to space. Solar energy is best used when liquid water is present...upflow of warm water. Samples of sulfide chimney nozzles, sulfide flanges, and alvinellid...phylogenetically distinct from their sulfide chimney cousins. This distinction implies that...

Melanie Summit; John A. Baross

2001-01-01T23:59:59.000Z

120

3. Measurements Measurements have been carried out at Lundebjerg for a little less than one half year from  

E-Print Network (OSTI)

these specific weeks ­ i.e. total solar radia- tion at the south facing chimney above no. 36 (see figure 2 system 40C and the solar ventilation chimneys. 3.1.1. Gable Figures 3.3-4 show the temperatures.1), the total solar radiation on ver- tical east at apartment 40 IIA (figure 2.2) and the ambient temperature

Note: This page contains sample records for the topic "labarge hogsback chimney" 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

Highway proximity and black carbon from cookstoves as a risk factor for higher blood pressure in rural China  

Science Journals Connector (OSTI)

...regional and global climate by absorbing solar radiation and heating the atmosphere and is the...open fire cookstove to a less-polluting chimney stove (40, 41). Although blood pressure is an important...Diaz A Mittleman MA Schwartz J ( 2007 ) Chimney stove intervention to reduce long-term...

Jill Baumgartner; Yuanxun Zhang; James J. Schauer; Wei Huang; Yuqin Wang; Majid Ezzati

2014-01-01T23:59:59.000Z

122

Survey of Archaeal Diversity Reveals an Abundance of Halophilic Archaea in a Low-Salt, Sulfide- and Sulfur-Rich Spring  

Science Journals Connector (OSTI)

...halobacteria in the black smoker chimney as well as in Zodletone Spring...salinity gradient of a coastal solar saltern. Environ. Microbiol...hypersaline stratified lake (Solar Lake, Sinai, Egypt). Appl...of archaea in a black smoker chimney structure. Appl. Environ...

Mostafa S. Elshahed; Fares Z. Najar; Bruce A. Roe; Aharon Oren; Thomas A. Dewers; Lee R. Krumholz

2004-04-01T23:59:59.000Z

123

Energy systems transformation  

Science Journals Connector (OSTI)

...energy-technology complex, e.g., solar and wind harvesting combined...not cause damage to others (e.g., a chimney falling on a passer-by would constitute...such as those caused by the collapsing chimney. If one owns an entity, one normally...

A. T. C. Jérôme Dangerman; Hans Joachim Schellnhuber

2013-01-01T23:59:59.000Z

124

Analyse du comportement dynamique et thermique d'un schoir solaire constitu d'un capteur matrice poreuse coupl une chemine solaire  

E-Print Network (OSTI)

fruit dryer, made up with a porous solar collector coupled to a solar chimney. The analysis is based-cheminée. Abstract. 2014 We present in this paper results concerning the dynamical and thermal behaviour of a solar that the efficiency of the dryer is increased through the superposed thermosiphons resulting from coupling dryer-chimney

Paris-Sud XI, Université de

125

Effects of the Boussinesq Approximation on the Results of Strongly-Buoyant Plume Calculations  

Science Journals Connector (OSTI)

Nearly all mathematical models which are commonly used to predict the dispersion of chimney gases in the atmosphere or heated water discharges in the aquatic environment employ the so-called Boussinesq approximation. It is part of this ...

M. Schatzmann; A. J. Policastro

1984-01-01T23:59:59.000Z

126

Cretaceous Cold-Seep Communities and Methane-Derived Carbonates in the Canadian Arctic  

Science Journals Connector (OSTI)

...CLAYPOOL, G.E., NATURAL GASES MARINE 99 ( 1974 ). COMMEAU...CARBON-ISOTOPE COMPOSITIONS OF NATURAL METHANES, AAPG BULLETIN-AMERICAN...HOVLAND, M, NORTH-SEA GAS FEEDS THE NORTH-SEA...SMOKER CHIMNEY FRAGMENTS IN CYPRUS SULFIDE DEPOSITS, NATURE...

BENOIT BEAUCHAMP; J. CHRISTOPHER HARRISON; WALTER W. NASSICHUK; H. ROY KROUSE; LESLIE S. ELIUK

1989-04-07T23:59:59.000Z

127

GreenTower | Open Energy Information  

Open Energy Info (EERE)

GreenTower Jump to: navigation, search Name: GreenTower Place: Haiger 6, Germany Zip: 35708 Sector: Solar Product: Developer of a solar chimney technology, with greenhouses for...

128

E-Print Network 3.0 - active giant pockmark Sample Search Results  

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

>> 1 Origin of pockmarks and chimney structures on the flanks of the Storegga Slide, offshore Norway Summary: -1 . GGC Giant gravity core; JPC jumbo piston core a Cores collected...

129

Specialty Cellular Glass Products and Their Applications  

E-Print Network (OSTI)

and boroaluminosilicate fields which exhibit a high degree of resistance to corrosion by aggressive chemicals as well. One product, sold as PENNGUARDTM block by Pennwalt Corporation, is used as a liner for chimneys where acid corrosion had previously caused substantial...

Rostoker, D.

1979-01-01T23:59:59.000Z

130

ship's camera-studded, remotely operated vehicle "Jason II" a mile-and-a-half below the surface.  

E-Print Network (OSTI)

, are mineral chimneys rich with extraordinary ecosystems that thrive in extreme temperatures and without, analysis of data from a major eruption on the Sun captured by the Solar Maximum Mission satellite in 1989

Pringle, James "Jamie"

131

Atmos. Chem. Phys., 9, 20352050, 2009 www.atmos-chem-phys.net/9/2035/2009/  

E-Print Network (OSTI)

by dust, biomass burning, fresh (indus- trial) chimney plumes, other coal burning pollution, and rel. Yang (mingxi@hawaii.edu) 1 Introduction Aerosols scatter and absorb shortwave solar radiation, gener

Meskhidze, Nicholas

132

Winds Across the Void  

Science Journals Connector (OSTI)

With a temperature of a few million Kelvin, the outer solar atmosphere, or corona, is so hot ... the Sun, like heat escaping from a chimney on a cold day. The high pressure...

Kenneth R. Lang

2009-01-01T23:59:59.000Z

133

Characterization of an Autotrophic Sulfide-Oxidizing Marine Arcobacter sp. That Produces Filamentous Sulfur  

Science Journals Connector (OSTI)

...vestimentiferan tube worms (45), a deep-sea hydrothermal vent chimney (V. Cilia and D. Prieur, unpublished data; uncultured eubacterium CHA3-437), hypersaline cyanobacterial mats from Solar Lake (Sinai) (72) and, most recently, from the redox interface...

C. O. Wirsen; S. M. Sievert; C. M. Cavanaugh; S. J. Molyneaux; A. Ahmad; L. T. Taylor; E. F. DeLong; C. D. Taylor

2002-01-01T23:59:59.000Z

134

Outlining social physics for modern societies—locating culture, economics, and politics: The Enlightenment reconsidered  

Science Journals Connector (OSTI)

...the atmospheric temperature bath, the solar flux, the chemical potentials of materials...atmospheric temper- ature bath; the solar flux; the chemical potentials of earth...regulatory immunity is exhibited by a chimney and partition added outside of a candle...

A. S. Iberall

1985-01-01T23:59:59.000Z

135

The Astronomical, Astrobiological and Planetary Science Case for Interstellar Spaceflight 1. INTRODUCTION  

E-Print Network (OSTI)

to traverse the interstellar medium between the Solar System and the target star. As any target star are encountered (at high galactic latitudes the LB appears to be open, forming a chimney-like structure

Crawford, Ian

136

SIMULATIONS DE DISPOSITIFS DU TYPE MUR TROMBE AVEC CODYRUN Harry BOYER, Franck LUCAS, Frdric MIRANVILLE, Alain BASTIDE,  

E-Print Network (OSTI)

extension, d'autres dispositions faisant appel aux mêmes principes tels que les cheminées solaires (solar chimney) font aussi l'objet de nombreuses publications (Buzzoni 1998, Raman 2001, Ong 2003, Awbi 2003

Paris-Sud XI, Université de

137

Micrometeorology of a Tropical Rainforest Before and After Selective Logging Scott Miller (sdmiller@uci.edu), Mike Goulden, Mary Menton, Ed Read, Rob Elliot, University of California, Irvine  

E-Print Network (OSTI)

dioxide exchange, they possibly act as chimneys with preferential venting of CO2 that may not be dectected (up/down) LiCor Solar Radiation Kipp & Zonen Net Radiation REBS Q*7 Rain Tipping Bucket PRE

Goulden, Michael L.

138

May 16, 2008 Changes from the Draft Final to the Final Report for Phase 1A  

E-Print Network (OSTI)

was included · The dimensions for the example 200 MW solar chimney project were updated. · Appendix B, which and performance impacts of dry-cooling for solar thermal projects · Noted that out-of-state resources that can

139

Multiparameter Viability Assay for Stress Profiling Applied to the Food Pathogen Listeria monocytogenes F2365  

Science Journals Connector (OSTI)

...Tecan Benelux BVBA, Giessen, The Netherlands). Black, chimney-style, flat-bottom 96-well plates (catalog number 655096...study of vital cellular functions in Escherichia coli during solar disinfection (SODIS). Microbiology 152 :1719-1729. 5...

Andreas Nocker; Martien Caspers; Athina Esveld-Amanatidou; Jos van der Vossen; Frank Schuren; Roy Montijn; Remco Kort

2011-07-15T23:59:59.000Z

140

TheGoldenGateBridgeWeatherJuly2010,Vol.65,No.7 fog, but the north tower had a story to tell. It  

E-Print Network (OSTI)

. It worked as a chimney. The fog entered and escaped through the openings of the tower, displaying iridescent they are caused by an object's shadows. Sightings of fogbows, solar glories, solar coronas, Brocken Spectres

Reading, University of

Note: This page contains sample records for the topic "labarge hogsback chimney" from the National Library of EnergyBeta (NLEBeta).
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141

FEMA B-526 / March 2010 Important Numbers and Addresses  

E-Print Network (OSTI)

: _________________________________________________ ___________________________________________________________ Location of Disaster Supplies Kit, like toppling chimneys, falling bricks, ceiling plaster, and light fixtures. Many of these conditions. Consult your local Building Department if you are unsure of the earthquake hazard in your locale. Based on

Wilcock, William

142

Solar-air power plant. Interim report, January 1, 1980-November 1, 1981  

SciTech Connect

The chimney conversion efficiency of transferring solar energy into wind energy for the proposed solar-air power plant has been investigated. The application of a chimney as the air-cooling system for a large-scale photovoltaic concentration power plant to transfer solar energy into electricity has also been studied. Several conclusions in reference to this basic research project and suggestions for further research phases are also summarized in this report.

Chen, I.

1982-01-01T23:59:59.000Z

143

New definition of fluid exergy in a gravitational field  

Science Journals Connector (OSTI)

This paper discusses the concept of working fluid exergy in an atmosphere stratified by a gravitational field, particularly the hot humid air in the atmosphere. A definition of exergy, different from that recently proposed by Petela (2008), is presented. Thermodynamic diagrams illustrate its elements and its technically feasible part in a transparent way. Reference papers are given for calculation of this part as technically feasible work potential of the hot humid air. This technically feasible part of the working potential can be used in the 'solar chimney'-type power plants, in cooling towers with natural circulation and in the hypothetical plants of the solar chimney type with high vortex columns instead of solar chimney.

Neven Ninic; Zdeslav Juric; Sandro Nizetic

2010-01-01T23:59:59.000Z

144

AUTOMATING THE SOLAR DRYER—AIRFLOW CONTROL UTILIZING PRESSURE DIFFRENCE CONCEPT  

Science Journals Connector (OSTI)

The presence of a chimney in natural convective solar dryer has proven its benefit in accelerated transport of moist air from the drying compartment and thus shortening the drying time for intended crops. The experiment and simulation studies done by various parties have guaranteed increases in the airflow in relation to the physical height of chimney. A simple automated control system is proposed to assist the controls of airflow rate so that a near optimum mass flow rate could be achieved for the best possible dried product quality in the shortest possible drying period.

T. B. Luk; A. Vakhguelt

2009-01-01T23:59:59.000Z

145

Effects of the boussinesq approximation on the results of strongly-buoyant plume calculations  

SciTech Connect

Nearly all mathematical models which are commonly used to predict the dispersion of chimney gases in the atmosphere or heated water discharges in the aquatic environment employ the so-called boussinesq approximation. It is part of this approximation that density variations appear solely in the buoyancy term of the momentum equation and are neglected in all other terms.

Schatzmann, M.; Policastro, A.J.

1984-01-01T23:59:59.000Z

146

Avian inhalation exposure chamber  

DOE Patents (OSTI)

An exposure system for delivering gaseous material ranging in particle size from 0.4 micrometers to 20.0 micrometers uniformly to the heads of experimental animals, primarily birds. The system includes a vertical outer cylinder and a central chimney with animal holding bottles connected to exposure ports on the vertical outer cylinder.

Briant, James K. (P.O. Box 999, Richland, WA 99352); Driver, Crystal J. (P.O. Box 999, Richland, WA 99352)

1992-01-01T23:59:59.000Z

147

Avian inhalation exposure chamber  

DOE Patents (OSTI)

An exposure system is designed for delivering gaseous material ranging in particle size from 0.4 micrometers to 20.0 micrometers uniformly to the heads of experimental animals, primarily birds. The system includes a vertical outer cylinder and a central chimney with animal holding bottles connected to exposure ports on the vertical outer cylinder. 2 figs.

Briant, J.K.; Driver, C.J.

1992-05-05T23:59:59.000Z

148

Yangtze Patrol: American Naval Forces in China  

E-Print Network (OSTI)

Yangtze Patrol: American Naval Forces in China A Selected, Partially-Annotated Bibliography literature of the United States Navy in China. mvh #12;"Like Chimneys in Summer" The thousands of men who served on the China Station before World War II have been all but forgotten, except in the mythology

149

STIMULATION AND RESERVOIR ENGINEERING OF GEOTHERMAL RESOURCES  

E-Print Network (OSTI)

STIMULATION AND RESERVOIR ENGINEERING OF GEOTHERMAL RESOURCES Paul Kruger and Henry J . Ramey, Jr . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 THE GEOTHERMAL CHIMNEY MODEL . . . . . . . . . . . . . . . . . . . 3 Current Design of t h e . . . . . . . . . . . . . . . 67 Geothermal Reservoir Phy.Sica1 PIodels . . . . . . . . . . . . 73 RAD3N I N GEOTHERMAL RESERVOIRS

Stanford University

150

Benchmark solution for a three-dimensional mixed convection flow -Detailed technical report  

E-Print Network (OSTI)

in many industrial applications: thermal and chemical reactors, chimneys, solar collectors, thermal-dimensional mixed convection flow in a horizontal rectangular channel heated from below and cooled from above) configuration (i.e. mixed convection flows in horizontal rectan- gular channels heated from below

Boyer, Edmond

151

M. Bahrami ENSC 388 (F09) Natural Convection 1 Natural Convection  

E-Print Network (OSTI)

. This force is called the buoyancy force. Fig. 2: Buoyancy force keeps the ship float in water object Water Displaced volume W Buoyancy force Ship #12; M. Bahrami. Other examples are hot balloon rising, and the chimney effect. Note that the buoyancy force needs

Bahrami, Majid

152

Microbial utilization of abiogenic carbon and hydrogen in a serpentinite-hosted system  

E-Print Network (OSTI)

Microbial utilization of abiogenic carbon and hydrogen in a serpentinite-hosted system Susan Q-hosted hydrothermal activity is exemplified by the Lost City Hydrothermal Field (30°N, Mid-Atlantic Ridge) where fluid demonstrate that in active carbonate chimneys where microbial sulfate reduction is important, up to 50

Gilli, Adrian

153

A serpentinite-hosted ecosystem in the Southern Mariana Forearc  

E-Print Network (OSTI)

hydrothermal field, 30°07N MAR) (4, 5). There, carbonate chimneys are produced by highly reducing, high pH (9 December 30, 2011 (received for review July 22, 2011) Several varieties of seafloor hydrothermal vents settings. The discovery of the Lost City hydrothermal field in the Mid-Atlantic Ridge has stimulated inter

Stern, Robert J.

154

Fossil evidence for serpentinization fluids fueling chemosynthetic assemblages  

E-Print Network (OSTI)

(received for review June 30, 2010) Among the deep-sea hydrothermal vent sites discovered in the past 30 mantle rock serpentinization and the spectacular seafloor carbonate chimneys precipitated from- nite-hosted hydrothermal system currently lacks chemosynthetic assemblages dominated by large animals

Demouchy, Sylvie

155

Caminibacter mediatlanticus sp. nov., a thermophilic, chemolithoautotrophic,  

E-Print Network (OSTI)

-ammonifying bacterium isolated from a deep-sea hydrothermal vent on the Mid-Atlantic Ridge James W. Voordeckers,1 strain TB-2T , was isolated from the walls of an active deep-sea hydrothermal vent chimney on the Mid. Growth occurred under chemolithoautotrophic conditions with H2 as the energy source and CO2 as the carbon

Vetriani, Costantino

156

AN EVALUATION OF SOLAR VALUATION METHODS USED IN UTILITY PLANNING AND PROCUREMENT PROCESSES  

E-Print Network (OSTI)

thermal storage or natural gas augmentation with CSP plants, one study considered PV coupled with a lead- acid battery,battery Trough Trough Trough Trough Power tower Solar chimney Natural gas firing in boiler N/A N/A PV Integrated thermal

Mills, Andrew D.

2014-01-01T23:59:59.000Z

157

USDA Forest Service RMRS-P-53CD. 2008. 339 In: Olberding, Susan D., and Moore, Margaret M., tech coords. 2008. Fort Valley Experimental Forest--A Century of  

E-Print Network (OSTI)

. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 408 p. Vascular Plant Checklist of the Chimney Spring and Limestone Flats Prescribed Burning Study Areas, NAU, Flagstaff, AZ, USFS, Rocky Mountain Research Station, Flagstaff, AZ; James Fowler, Carolyn Hull

158

The Oregon State University Kelley Engineering Center  

E-Print Network (OSTI)

Design Process Project Features Building Performance ? Four-stories ? Stack-driven chimney for natural ventilation ? Motorized windows and dampers ? Manual and controlled operation ? Daylight Harvesting Project Features: Atrium About Kelley Design... screenwall ? Evacuated tube solar hot water collector system ? Provides domestic hot water at 70% utilization efficiency Project Features: Solar Technology About Kelley Design Process Project Features Building Performance Building Performance About...

Schroeder, B.

159

Experimental evaluation of a naturally ventilated PV double-skin building envelope in real operating conditions  

E-Print Network (OSTI)

-4Mar2014 Author manuscript, published in "Solar Energy 103 (2014) 223-241" DOI : 10.1016/j.solener.2014. Keywords: Building integrated photovoltaic system; Natural ventilation; Chimney effect; Monitoring 1 fallen by 50%. To these ends, significant investments are being made into solar energy, which is seen

Paris-Sud XI, Université de

160

38 ENGenious NO.7 2010 alumni profile  

E-Print Network (OSTI)

and GALCIT had on their lives and careers. ENGenious: What is the idea behind Cool Earth Solar? Eric: We want that are better than putting smoke up a chimney. Renewable energies do not present a threat, and our view a very rigorous approach to problem Cool Earth Solar is a company founded and managed by Graduate

Note: This page contains sample records for the topic "labarge hogsback chimney" 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

From Metagenomics to Pure Culture: Isolation and Characterization of the Moderately Halophilic Bacterium Spiribacter salinus gen. nov., sp. nov.  

Science Journals Connector (OSTI)

...throughout the salinity gradient of a coastal solar saltern. Environ. Microbiol. 4 :349-360...fingerprinting methods in a multipond solar saltern. Environ. Microbiol. 4 :338-348...sulfur-reducing bacterium isolated from a sulfide chimney in Suiyo Seamount. Int. J. Syst. Evol...

María José León; Ana B. Fernández; Rohit Ghai; Cristina Sánchez-Porro; Francisco Rodriguez-Valera; Antonio Ventosa

2014-04-18T23:59:59.000Z

162

PROCEEDINGS OF THE CONFERENCE ON ENERGY RESEARCH AT HISTORICALLY BLACK UNIVERSITIES, JUNE 17-19, 1980, SHERATON PATRIOT INN, WILLIAMSBURG, VIRGINIA  

E-Print Network (OSTI)

solar energy of the whole plant will be accumulated into the wind chimneyus~ng solar energy today. By applying a new idea of "Chimneysolar energy will be accumulated into an Energy Collector/ Dissipater (which is built inside the wind chimney),

Authors, Various

2014-01-01T23:59:59.000Z

163

Geoengineering: The good, the MAD, and the sensible  

Science Journals Connector (OSTI)

...2009, the tale of geoengineering, promising end-of-the-chimney fixes for anthropogenic global warming, has become increasingly...tale of two fairies (2): the rather wicked one conjures up solar radiation management (SRM), and the tolerably good one delivers...

Hans Joachim Schellnhuber

2011-01-01T23:59:59.000Z

164

Martin J. (Mike) Pasqualetti School of Geographical Sciences and Urban Planning -Arizona State University  

E-Print Network (OSTI)

concentrators with Sterling engine " Solar chimney " Photovoltaic #12;#12;#12;#12;Source: NREL #12: Export 5,930 AF CA: Export 24,501 AF Revised 11/28/2008 #12;Source: NREL. Concentrating Solar Power Commercial Application Study: Reducing Water Consumption of Concentrating Solar Power Electricity Generation

Scott, Christopher

165

Figure 5. Net radiation of the study area on June 21, 2003 ESTIMATION OF HEAT FLUXES  

E-Print Network (OSTI)

of incoming solar radiation and long-wave radiation emitted from the atmosphere to land surface and from chimneys etc. In addition anthropogenic sensible heat contributes to increased surface temperature. However this influence is sufficiently small compared to the solar radiation under clear skies during

Hall, Sharon J.

166

GeoChip-based analysis of metabolic diversity of microbial communities at the Juan de Fuca Ridge hydrothermal vent  

Science Journals Connector (OSTI)

...originally isolated from geothermal ground water...metabolism in the geothermal environment. However...observed during the development of vent chimneys...38 Wu L ( 2004 ) Development and evaluation of microarray-based...Department of Energy under the Genomics...and Environmental Research, Office of...

Fengping Wang; Huaiyang Zhou; Jun Meng; Xiaotong Peng; Lijing Jiang; Ping Sun; Chuanlun Zhang; Joy D. Van Nostrand; Ye Deng; Zhili He; Liyou Wu; Jizhong Zhou; Xiang Xiao

2009-01-01T23:59:59.000Z

167

Anode shroud for off-gas capture and removal from electrolytic oxide reduction system  

DOE Patents (OSTI)

An electrolytic oxide reduction system according to a non-limiting embodiment of the present invention may include a plurality of anode assemblies and an anode shroud for each of the anode assemblies. The anode shroud may be used to dilute, cool, and/or remove off-gas from the electrolytic oxide reduction system. The anode shroud may include a body portion having a tapered upper section that includes an apex. The body portion may have an inner wall that defines an off-gas collection cavity. A chimney structure may extend from the apex of the upper section and be connected to the off-gas collection cavity of the body portion. The chimney structure may include an inner tube within an outer tube. Accordingly, a sweep gas/cooling gas may be supplied down the annular space between the inner and outer tubes, while the off-gas may be removed through an exit path defined by the inner tube.

Bailey, James L.; Barnes, Laurel A.; Wiedmeyer, Stanley G.; Williamson, Mark A.; Willit, James L.

2014-07-08T23:59:59.000Z

168

Solar ventilation and tempering  

Science Journals Connector (OSTI)

The paper presents basic information about solar panels designed realized and used for solar ventilation of rooms. Used method of numerical flow simulation gives good overview about warming and flowing of the air in several kinds of realized panels (window facade chimney). Yearlong measurements give a good base for calculations of economic return of invested capital. The operation of the system in transient period (spring autumn) prolongs the period without classical heating of the room or building in winter the classical heating is supported. In the summer period the system furnished with chimney can exhaust inner warm air together with necessary cooling of the system by gravity circulation only. System needs not any invoiced energy source; it is supplied entirely by solar energy. Large building systems are supported by classical electric fan respectively.

2014-01-01T23:59:59.000Z

169

Geospatial Semantics for Topographic Data  

E-Print Network (OSTI)

Grounds 3 Disturbed Surface 3 Trade 3 28 Ecological Regime Tundra Desert Grassland Scrub Forest Pasture Cultivated Cropland Transition area Nature reserve 29 Natural/Artificial Reach hasPart: Bottom Channel Pond Basin Natural... Arch Divide Karst Ridge line Bar Drainage basin Lava Salt pan Basin Dunes Mineral pile Shaft Beach Fault Moraine Sink Bench Floodplain Mount Solution chimneys Cape Fracture Mountain Range Summit Catchment Fumarole Peak Talus Cave Gap Peneplain...

Usery, Lynn

2013-01-24T23:59:59.000Z

170

Visualizing a Living Building  

E-Print Network (OSTI)

: solar, temperature, moisture, wind, psychometric and regional ecosystem data for the Athens, GA region (Fig. 3). Figure 3: Odum Site and Climate Analysis. Source: (Courtesy of BNIM, 2009) The site is on the main campus of the University... skylights. 3) Vegetated courtyard with running stream cleans and tempers the air. 4) Double skin façade acts as a convection chimney providing a stack effect. The pedagogy of the School is served by related elements. ECOL 3520 is served...

Padget, Steve

2013-01-01T23:59:59.000Z

171

Victoria & Albert Museum- Medieval & Renaissance Galleries: A Passive Approach to Humidity Control  

E-Print Network (OSTI)

advantage of original chimneys and trenches. Addressing sustainability in the project required the balancing and optimisation of a range of issues that had the potential to create conflicts; artefact conservation and energy use, improving accessibility...). Space temperatures dropped as low as 13?C but the temperatures during occupied hours are only below 18?C for a relatively small proportion of the time, around 7% of the occupied hours or 3 and a half weeks. This is because solar gain, occupancy load...

Lerpiniere, A.; Bingham, M.; Walker, S.

2010-01-01T23:59:59.000Z

172

V&A Medieval & Renaissance Galleries: A Passive Approach to Humidity Control  

E-Print Network (OSTI)

the existing fabric, where possible taking advantage of original chimneys and trenches. Addressing sustainability in the project required the balancing and optimisation of a range of issues that had the potential to create conflicts; artefact conservation... proportion of the time, around 7% of the occupied hours or 3 and a half weeks. This is because solar gain, occupancy load and the lighting load act to heat the space up in the morning. Eliminating low humidity levels entirely is difficult due...

Lerpiniere, A.

2011-01-01T23:59:59.000Z

173

LAB 7 THE ENERGY CRISIS IN CALIFORNIA 1. Based on your TA's lecture, analyze briefly the California energy situation.  

E-Print Network (OSTI)

% Hydro 17% Coal 18% Biomass 3% Nuclear 13% Oil 34% Solar 0% #12;2.1. OIL 2.2. COAL 2.3. BIOMASS #12;2.4. NUCLEAR 2.5. NATURAL GAS 2.6. SOLAR #12;2.7. WIND 2.8. HYDRO 3. What are the easier and most difficult is burning to prevent up to 8 percent of your furnace-heated air from going up the chimney. YES NO Rearrange

174

Building America Top Innovations Hall of Fame Profile Â… Attic Air Sealing Guidelines  

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

Terminology Terminology Air Barrier Material (ABM) --- A does not allow air to pass throu plywood/OSB, foam board, duc lumber. Backing --- Any material that s be sprayed so as to provide an glass batts. Baffle (B) --- Manufactured chu direct ventilation air flow up an foam board or cardboard. Thermal Blocking --- Any rigid heat sources like chimneys or metal and gypsum board. Fasteners --- Staples, screws o

175

Modification of the Core Cooling System of TRIGA 2000 Reactor  

SciTech Connect

To accomplish safety requirements, a set of actions has to be performed following the recommendations of the IAEA safety series 35 applied to research reactor. Such actions are considered in modernization of the old system, improving the core cooling system and safety evaluations. Due to the complexity of the process and the difficulty in putting the apparatus in the reactor core, analytical and experimental study on the determination of flow and temperature distribution in the whole coolant channel are difficult to be done. In the present work, a numerical study of flow and temperature distribution in the coolant channel of TRIGA 2000 has been carried out using CFD package. For this study, simulations were carried out on 3-D tested model. The model consists of the reactor tank, thermal and thermalizing column, reflector, rotary specimen rack, chimney, fuel element, primary pipe, diffuser, beam tube and a part of the core are constructed by 1.50 million unstructured tetrahedral cell elements. The results show that for the initial condition (116 fuel elements in the core) and for the inlet temperature of 24 deg. C and the primary velocity of 5.6 m/s, there no boiling phenomena occur in the coolant channel. Due to this result, it is now possible to improve the core cooling system of TRIGA 2000 reactor. Meanwhile, forced flow from the diffuser system only affected the flow pattern in the outside of chimney and put on a small effect to the fluid flow's velocity in the inside of chimney.

Umar, Efrizon; Fiantini, Rosalina [National Nuclear Energy Agency of Indonesia, Jalan Tamansari 71, Bandung, 40132 (Indonesia)

2010-06-22T23:59:59.000Z

176

OpenEI Community - natural gas+ condensing flue gas heat recovery+ water  

Open Energy Info (EERE)

Increase Natural Gas Increase Natural Gas Energy Efficiency http://en.openei.org/community/group/increase-natural-gas-energy-efficiency Description: Increased natural gas energy efficiency = Reduced utility bills = Profit In 2011 the EIA reports that commercial buildings, industry and the power plants consumed approx. 17.5 Trillion cu.ft. of natural gas.How much of that energy was wasted, blown up chimneys across the country as HOT exhaust into the atmosphere? 40% ~ 60% ? At what temperature?read more natural gas+ condensing flue gas heat

177

A Review of Sloped Solar Updraft Power Technology  

Science Journals Connector (OSTI)

Abstract The Solar Updraft Power Plant (SUPP) concept was successfully proven in the last few decades through many experimental and analytical approaches. However, the high investment cost compared to the plant efficiency and the limited height of the chimney due to the technological constraints are considered the main disadvantages of the SUPP. In order to overcome these problems, many novel concepts were proposed; One being the Sloped Solar Updraft Power Plant (SSUPP). This paper provides a comprehensive overall review for all SSUPP researches up-to-date including the principle with a description of the plant, physical process, theoretical and experimental studies.

Shadi Kalash; Wajih Naimeh; Salman Ajib

2014-01-01T23:59:59.000Z

178

Engineering development of a bubble tray structure  

E-Print Network (OSTI)

esistant covex- ing could be formed to fit the carbon steel stxuctural shape, and attached to the carbon steel structural shape by suitable means such as arc ox spot welding. Structural channel shapes were considex'ed as they cou'id be assembled...'e px'otected by 8 cox'rosion resistant materia 1 ~ This could be done by the use of a coxxosion xesistant vapor chimney px'operly swaged ox' welded in the riser opening x ox' by means of 'lace ' welding the exposed caxbon steel with cox'xos- ion...

Glitsch, Hans C

2012-06-07T23:59:59.000Z

179

THE ODICY  

E-Print Network (OSTI)

by renown or money Loving every person equally Go now, Tony. Else you got to stay Tony. Fix a stocking to the chimney Decorate a tree this holiday Artificial is the only way to fly Walking is the best activity In your sleep is the better way 7....? It‘s your decision. It‘s a destination Wedding. There‘s no longer any point Pretending you and I are not in motion Through what we cannot call oblivion Which will be remedied by morning, certain As solar chiliads continue shining ?It...

Console, Cyrus

2010-12-31T23:59:59.000Z

180

A conceptual model and preliminary estimate of potential tritium migration from the Benham (U-20c) site, Pahute Mesa, Nevada Test Site  

SciTech Connect

U-20c is the site of a large below-water-table nuclear test near the Nevada Test Site boundary. A conceptual model of potential groundwater migration of tritium from U-20c is constructed and quantitatively evaluated in this report. The lower portion of the collapse chimney at Benham is expected to intersect 200 m of permeable rhyolite lava, overlain by similar thicknesses of low-permeability zeolitized bedded tuff, then permeable welded tuff. Vertical groundwater flow through the chimney is predicted to be minimal, horizontal transport should be controlled by the regional groundwater flow. Analytic solutions treating only advective transport indicate 1 to 2 km of tritium movement (95% confidence interval 0.7--2.5 km) within 5 years after test-related pressure-temperature transients have dissipated. This point lies at the axis of a potentiometric surface trough along the west edge of Area 20, Nevada Test Site. Within 25 years, movement is predicted to extend to 3 km (95% confidence interval 2--5 km) approximately to the intersection of the trough and the Nevada Test Site boundary. Considering the effects of radioactive decay, but not dispersion, plume concentration would fall below Safe Drinking Water Act standards by 204 years, at a predicted distance of 11 km (95% confidence interval 7--31 km). This point is located in the eastern portion of the Timber Mountain Caldera moat within the Nellis Air Force Range (military bombing range).

Brikowski, T.; Mahin, G. [Nevada Univ., Reno, NV (United States). Water Resources Center

1993-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "labarge hogsback chimney" 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

Application of Crunch-Flow Routines to Constrain Present and Past Carbon Fluxes at Gas-Hydrate Bearing Sites  

SciTech Connect

In November 2012, Oregon State University initiated the project entitled: Application of Crunch-Flow routines to constrain present and past carbon fluxes at gas-hydrate bearing sites. Within this project we developed Crunch-Flow based modeling modules that include important biogeochemical processes that need to be considered in gas hydrate environments. Our modules were applied to quantify carbon cycling in present and past systems, using data collected during several DOE-supported drilling expeditions, which include the Cascadia margin in US, Ulleung Basin in South Korea, and several sites drilled offshore India on the Bay of Bengal and Andaman Sea. Specifically, we completed modeling efforts that: 1) Reproduce the compositional and isotopic profiles observed at the eight drilled sites in the Ulleung Basin that constrain and contrast the carbon cycling pathways at chimney (high methane flux) and non-chimney sites (low methane, advective systems); 2) Simulate the Ba record in the sediments to quantify the past dynamics of methane flux in the southern Hydrate Ridge, Cascadia margin; and 3) Provide quantitative estimates of the thickness of individual mass transport deposits (MTDs), time elapsed after the MTD event, rate of sulfate reduction in the MTD, and time required to reach a new steady state at several sites drilled in the Krishna-Godavari (K-G) Basin off India. In addition we developed a hybrid model scheme by coupling a home-made MATLAB code with CrunchFlow to address the methane transport and chloride enrichment at the Ulleung Basins chimney sites, and contributed the modeling component to a study focusing on pore-scale controls on gas hydrate distribution in sediments from the Andaman Sea. These efforts resulted in two manuscripts currently under review, and contributed the modeling component of another pare, also under review. Lessons learned from these efforts are the basis of a mini-workshop to be held at Oregon State University (Feb 2014) to instruct graduate students (OSU and UW) as well as DOE staff from the NETL lab in Albany on the use of Crunch Flow for geochemical applications.

Torres, Marta

2014-01-31T23:59:59.000Z

182

JGI - Why Sequence Alvinella pompejana?  

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

Pompeii Worm? Pompeii Worm? Alvinella pompeiiana One of the most thermophilic eukaryotes, Alvinella pompejana, the Pompeii worm, is a resident of the Pacific deep-sea hydrothermal vent area. These worms reside on black smoker chimneys 2500 meters under the ocean surface where they experience (1) the highest temperatures and temperature gradients known for any eukaryote (20-80°C), (2) a toxic soup of heavy metals, and (3) very low pH. Thus their environment is perhaps the most extreme known for any eukaryote. This project unites cDNA sequencing, which is crucial for genetic and protein analysis, with macromolecular structure determination by x-ray crystallography, solution small-angle x-ray scattering, and electron microscopy. Proteins from thermophilic sources, currently limited to unicellular bacteria and archaea, have proven to be

183

Recovery Act Changes Hanford Skyline with Explosive Demolitions |  

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

Recovery Act Changes Hanford Skyline with Explosive Demolitions Recovery Act Changes Hanford Skyline with Explosive Demolitions Recovery Act Changes Hanford Skyline with Explosive Demolitions American Recovery and Reinvestment Act workers at the Hanford Site recently used explosives to demolish industrial structures that supported plutonium processing for national defense. The explosive demolitions took down two 250-foot-tall exhaust chimneys, two 90-foot-fall air filter structures, and a 140-foot-tall water tower. The water tower was marked by a "Work Safely" motto that greeted workers. "Given the sheer height of the structures, explosive demolition was selected as the safer method of demolition," said Kurt Kehler, vice president and decommissioning and demolition project manager of CH2M HILL Plateau Remediation Company, DOE's contractor at the

184

Out With the Old, In With the New: New Hampshire Town to Upgrade Lighting |  

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

Out With the Old, In With the New: New Hampshire Town to Upgrade Out With the Old, In With the New: New Hampshire Town to Upgrade Lighting Out With the Old, In With the New: New Hampshire Town to Upgrade Lighting June 17, 2010 - 3:09pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE Newfields, New Hampshire's town hall has a lot of old-time charm worth keeping, with its steeple, rusted-red brick and chimney stacks, but the town lights are ready for a makeover. "Obviously, they don't have gas lamps from the 1800s," jokes Clay Mitchell, Newfields' town planner. "But the lights are old. In the town hall meeting room, they are awful. They are big, fat and hum when you turn them on." Now, with a $2,000 Energy Efficiency and Conservation Block Grant (EECBG) from the U.S. Department of Energy and New Hampshire Office of Energy and

185

natural gas+ condensing flue gas heat recovery+ water creation+ CO2  

Open Energy Info (EERE)

natural gas+ condensing flue gas heat recovery+ water creation+ CO2 natural gas+ condensing flue gas heat recovery+ water creation+ CO2 reduction+ cool exhaust gases+ Energy efficiency+ commercial building energy efficiency+ industrial energy efficiency+ power plant energy efficiency+ Home Increase Natural Gas Energy Efficiency Description: Increased natural gas energy efficiency = Reduced utility bills = Profit In 2011 the EIA reports that commercial buildings, industry and the power plants consumed approx. 17.5 Trillion cu.ft. of natural gas. How much of that energy was wasted, blown up chimneys across the country as HOT exhaust into the atmosphere? 40% ~ 60% ? At what temperature? Links: The technology of Condensing Flue Gas Heat Recovery natural gas+ condensing flue gas heat recovery+ water creation+ CO2 reduction+ cool exhaust gases+ Energy efficiency+ commercial building

186

Applied Science  

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

Geological Sciences Geological Sciences Atomic-scale structure of the orthoclase (001)-water interface measured with high-resolution x-ray reflectivity P. Fenter, H. Teng, P. Geissbühler, J.M. Hanchar, K.L. Nagy, and N.C. Sturchio Chemical analysis of individual interplanetary dust particles G.J. Flynn, S.R. Sutton, M. Rivers, P. Eng, and M. Newville Diffusion-limited biotransformation of metal contaminants in soils/sediments: chromium T. Tokunaga, J. Wan, D. Joyner, T. Hazen, M. Firestone, E. Schwartz, S. Sutton, and M. Newville Investigation of meteorite porosity by computed microtomography G.J. Flynn, M. Rivers, and S.R. Sutton Microscale imaging of pore structure in hydrothermal sulfide chimneys using synchrotron x-ray computed tomography P. O'Day, J. Muccino, S. Thompson, M.Jew, and J. Holloway

187

Simple Maintenance Saves Costly Furnace Repair/Replacement | Department of  

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

Simple Maintenance Saves Costly Furnace Repair/Replacement Simple Maintenance Saves Costly Furnace Repair/Replacement Simple Maintenance Saves Costly Furnace Repair/Replacement January 6, 2010 - 8:26am Addthis Chris Stewart Senior Communicator at DOE's National Renewable Energy Laboratory For the past few weeks, my forced-air gas furnace has been on the fritz. I blame this on the fact that I haven't been as diligent as I should have been with regular furnace maintenance, which includes: Checking the condition of the vent connection pipe and chimney Checking the physical integrity of the heat exchanger Adjusting the controls to provide optimum water and air temperature settings for both efficiency and comfort Having a technician perform a combustion-efficiency test Checking the combustion chamber for cracks. Testing for carbon monoxide

188

Recovery Act Changes Hanford Skyline with Explosive Demolitions |  

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

Recovery Act Changes Hanford Skyline with Explosive Demolitions Recovery Act Changes Hanford Skyline with Explosive Demolitions Recovery Act Changes Hanford Skyline with Explosive Demolitions American Recovery and Reinvestment Act workers at the Hanford Site recently used explosives to demolish industrial structures that supported plutonium processing for national defense. The explosive demolitions took down two 250-foot-tall exhaust chimneys, two 90-foot-fall air filter structures, and a 140-foot-tall water tower. The water tower was marked by a "Work Safely" motto that greeted workers. "Given the sheer height of the structures, explosive demolition was selected as the safer method of demolition," said Kurt Kehler, vice president and decommissioning and demolition project manager of CH2M HILL Plateau Remediation Company, DOE's contractor at the

189

Wood and Pellet Heating Basics | Department of Energy  

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

Wood and Pellet Heating Basics Wood and Pellet Heating Basics Wood and Pellet Heating Basics August 16, 2013 - 3:02pm Addthis Wood-burning and pellet fuel appliances use biomass or waste resources to heat homes or buildings. Types of Wood- and Pellet-Burning Appliances The following is a brief overview of the different types of wood and pellet fuel appliances available. High-Efficiency Fireplaces and Fireplace Inserts Designed more for show, traditional open masonry fireplaces should not be considered heating devices. Traditional fireplaces draw in as much as 300 cubic feet per minute of heated room air for combustion, then send it straight up the chimney. Fireplaces also produce significant air pollution. Although some fireplace designs seek to address these issues with dedicated air supplies, glass doors, and heat recovery systems, fireplaces are still

190

Out With the Old, In With the New: New Hampshire Town to Upgrade Lighting |  

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

Out With the Old, In With the New: New Hampshire Town to Upgrade Out With the Old, In With the New: New Hampshire Town to Upgrade Lighting Out With the Old, In With the New: New Hampshire Town to Upgrade Lighting June 17, 2010 - 3:09pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE Newfields, New Hampshire's town hall has a lot of old-time charm worth keeping, with its steeple, rusted-red brick and chimney stacks, but the town lights are ready for a makeover. "Obviously, they don't have gas lamps from the 1800s," jokes Clay Mitchell, Newfields' town planner. "But the lights are old. In the town hall meeting room, they are awful. They are big, fat and hum when you turn them on." Now, with a $2,000 Energy Efficiency and Conservation Block Grant (EECBG) from the U.S. Department of Energy and New Hampshire Office of Energy and

191

Baby Brutes: Simulations Help Solve the Mysteries of Massive Young  

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

Baby Brutes Baby Brutes Baby Brutes Simulations Help Solve the Mysteries of Massive Young Star-Forming Galaxies March 31, 2010 | Tags: Astrophysics Contact: Margie Wylie, mwylie@lbl.gov, +1 510 486 7421 Primack-fig1a.png Figure 1. In this model galactic plane (seen in cross section), the energy input of stellar superclusters causes gases to shoot out at speeds up to 1000 kilometers per second at temperatures reaching 100 million Kelvin. These appear as plumes or "chimneys," visible in the top three frames (showing density, temperature, and velocity; the bottom frame shows gas column density). Small bubbles of hot gas in the field (visible in the top two frames) are the result of stellar feedback from runaway stars. Astronomers have in recent years been surprised to find hulking brutes

192

Windy Gap Firming Project  

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

Windy Gap Firming Project Windy Gap Firming Project Skip Navigation Links Transmission Functions Infrastructure projects Interconnection OASIS OATT Windy Gap Firming Project, Final Environmental Impact Statement, DOE/EIS-0370 (cooperating agency) Western's proposed action is to relocate approximately 3.8 miles of the existing Estes to Lyons 115-kilovolt transmission line, if the Chimney Hollow Reservoir alternative is constructed. The line would be moved outside the area proposed for the reservoir, and Western would ensure the new location would allow the agency to continue to operate and maintain it. Section 2.4.1.4 of the Final Environmental Impact Statement, Volume 1 provides more information on the transmission line relocation proposal. The U.S. Department of the Interior, Bureau of Reclamation is the Lead Agency for the National Environmental Policy Act Review. Cooperating agencies are Western, the U.S. Army Corps of Engineers and Grand County, Colo.

193

Stack Height Requirements (Ohio) | Department of Energy  

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

Stack Height Requirements (Ohio) Stack Height Requirements (Ohio) Stack Height Requirements (Ohio) < Back Eligibility Industrial Investor-Owned Utility Municipal/Public Utility Rural Electric Cooperative Utility Program Info State Ohio Program Type Environmental Regulations Provider Ohio Environmental Protection Agency This chapter of the law establishes that the Ohio Environmental Protection Agency provides regulations for stacks for industrial facilities. "Stack" means any chimney, flue, conduit or duct arranged to conduct any emissions to the ambient air, excluding flares. "Stack height" means the distance from the ground-level elevation at the base of the stack to the crown of the stack. If a stack arises from a building or other structure, the ground-level elevation of that building or structure will be

194

Hopper (Phase 1) Prepares NERSC for Petascale Computing  

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

2010 A selection of scientific results produced by NERSC users. Prepared by the National Energy Research Scientific Computing Center Lawrence Berkeley National Laboratory Berkeley, CA 94720 SEARCH Computing Sciences ABOUT US RESEARCH OUR SCIENTISTS MEDIA CENTER CONTACT US Figure 1. In this model galactic plane (seen in cross section), the energy input of stellar superclusters causes gases to shoot out at speeds up to 1000 kilometers per second at temperatures reaching 100 million Kelvin. These appear as plumes or "chimneys," visible in the top three frames (showing density, temperature, and velocity; the bottom frame shows gas column density). Small bubbles of hot gas in the field (visible in the top two frames) are the result of stellar feedback from runaway stars.

195

Recovery Act Changes Hanford Skyline with Explosive Demolitions  

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

American Recovery and Reinvestment Act workers at the Hanford Site recently American Recovery and Reinvestment Act workers at the Hanford Site recently used explosives to demolish industrial structures that supported plutonium processing for national defense. The explosive demolitions took down two 250-foot-tall exhaust chimneys, two 90-foot-fall air filter structures, and a 140-foot-tall water tower. The water tower was marked by a "Work Safely" motto that greeted workers. "Given the sheer height of the structures, explosive demolition was selected as the safer method of demolition," said Kurt Kehler, vice president and decommissioning and demolition project manager of CH2M HILL Plateau Remediation Company, DOE's contractor at the Hanford Site. The structures supported the 284 West Power House, which was built in 1943 as

196

Energy Saver Blog | Department of Energy  

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

January 19, 2010 January 19, 2010 Tax Credits Might Be Your Ticket to Savings Another way to cash in on big savings is by grabbing onto the energy efficiency tax credits. January 18, 2010 Our Dog Discovered Our Ducts Have Cats We don't own a cat, and Matilda's seeming insistence that one was living inside our duct work was a little unnerving, to say the least. January 14, 2010 What Are Your Reasons for Saving Energy? This week, Elizabeth discussed how saving energy could be contagious. January 12, 2010 Chimneys: Warm and Cozy or Easy Exit for Your Heat? Both of my childhood homes featured fireplaces. If you've had one, you know how terrific they can be-great places to bask on cold winter nights, an easy opportunity to toast marshmallows, picturesque, undeniably a pleasure in the house that has one.

197

Ohio | Department of Energy  

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

Sulfur Dioxide Regulations (Ohio) Sulfur Dioxide Regulations (Ohio) This chapter of the law establishes that the Ohio Environmental Protection Agency provides sulfur dioxide emission limits for every county, as well as regulations for the emission, monitoring and equipment for industries that have sulfur dioxide emissions. The Ohio EPA's Division of Air Pollution Control has monitoring and compliance programs authorized under this law. October 16, 2013 Stack Height Requirements (Ohio) This chapter of the law establishes that the Ohio Environmental Protection Agency provides regulations for stacks for industrial facilities. "Stack" means any chimney, flue, conduit or duct arranged to conduct any emissions to the ambient air, excluding flares. "Stack height" means the distance from the ground-level elevation at the base of the stack

198

Stimuli-Responsive Metal Organic Frameworks: Stimuli-Responsive Metal Organic Frameworks for Energy-Efficient Post Combustion Capture  

SciTech Connect

IMPACCT Project: A team led by three professors at Texas A&M is developing a subset of metal organic frameworks that respond to stimuli such as small changes in temperature to trap CO2 and then release it for storage. These frameworks are a promising class of materials for carbon capture applications because their structure and chemistry can be controlled with great precision. Because the changes in temperature required to trap and release CO2 in Texas A&M’s frameworks are much smaller than in other carbon capture approaches, the amount of energy or stimulus that has to be diverted from coal-fired power plants to accomplish this is greatly reduced. The team is working to alter the materials so they bind only with CO2, and are stable enough to withstand the high temperatures found in the chimneys of coal-fired power plants.

None

2010-07-01T23:59:59.000Z

199

Oil shale retort apparatus  

DOE Patents (OSTI)

A retorting apparatus including a vertical kiln and a plurality of tubes for delivering rock to the top of the kiln and removal of processed rock from the bottom of the kiln so that the rock descends through the kiln as a moving bed. Distributors are provided for delivering gas to the kiln to effect heating of the rock and to disturb the rock particles during their descent. The distributors are constructed and disposed to deliver gas uniformly to the kiln and to withstand and overcome adverse conditions resulting from heat and from the descending rock. The rock delivery tubes are geometrically sized, spaced and positioned so as to deliver the shale uniformly into the kiln and form symmetrically disposed generally vertical paths, or "rock chimneys", through the descending shale which offer least resistance to upward flow of gas. When retorting oil shale, a delineated collection chamber near the top of the kiln collects gas and entrained oil mist rising through the kiln.

Reeves, Adam A. (Grand Junction, CO); Mast, Earl L. (Norman, OK); Greaves, Melvin J. (Littleton, CO)

1990-01-01T23:59:59.000Z

200

Sellafield Decommissioning Programme - Update and Lessons Learned  

SciTech Connect

The Sellafield site in North West England has over 240 active facilities covering the full nuclear cycle from fuel manufacture through generation, reprocessing and waste treatment. The Sellafield decommissioning programme was formally initiated in the mid 1980s though several plants had been decommissioned prior to this primarily to create space for other plants. Since the initiation of the programme 7 plants have been completely decommissioned, significant progress has been made in a further 16 and a total of 56 major project phases have been completed. This programme update will explain the decommissioning arrangements and strategies and illustrate the progress made on a number of the plants including the Windscale Pile Chimneys, the first reprocessing plan and plutonium plants. These present a range of different challenges and requiring approaches from fully hands on to fully remote. Some of the key lessons learned will be highlighted.

Lutwyche, P. R.; Challinor, S. F.

2003-02-24T23:59:59.000Z

Note: This page contains sample records for the topic "labarge hogsback chimney" 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

Spiral precipitation patterns in confined chemical gardens  

E-Print Network (OSTI)

Chemical gardens are mineral aggregates that grow in three dimensions with plant-like forms and share properties with self-assembled structures like nano-scale tubes, brinicles or chimneys at hydrothermal vents. The analysis of their shapes remains a challenge, as their growth is influenced by osmosis, buoyancy and reaction-diffusion processes. Here we show that chemical gardens grown by injection of one reactant into the other in confined conditions feature a wealth of new patterns including spirals, flowers, and filaments. The confinement decreases the influence of buoyancy, reduces the spatial degrees of freedom and allows analysis of the patterns by tools classically used to analyze two-dimensional patterns. Injection moreover allows the study in controlled conditions of the effects of variable concentrations on the selected morphology. We illustrate these innovative aspects by characterizing quantitatively, with a simple geometrical model, a new class of self-similar logarithmic spirals observed in a large zone of the parameter space.

Florence Haudin; Julyan H. E. Cartwright; Fabian Brau; A. De Wit

2014-12-15T23:59:59.000Z

202

Glasses for solar energy conversion systems  

Science Journals Connector (OSTI)

Solar technologies are projected to increase tremendously over the next 10 years. Glasses are playing an important role as transparent materials of photovoltaic (PV) cells and concentrating solar power (CSP) systems. Glasses are materials of short energy payback time and environmental compatibility suitable for sustainable energy concepts. The paper reviews recent solar applications. Surface structuring and coating of glasses are shown to improve energy efficiency for solar conversion systems substantially. Encapsulated glass-to-glass PV modules and solar photocatalytic glass surfaces are identified as elements of a green architecture combining renewable power generating and destruction of air pollutants of urban environments. Emerging solar technologies for power generation, including transparent PV modules, solar chimney and thermoelectric systems may become significant areas of future solar glass applications.

J. Deubener; G. Helsch; A. Moiseev; H. Bornhöft

2009-01-01T23:59:59.000Z

203

An automated miniature robotic vehicle inspection system  

SciTech Connect

A novel, autonomous reconfigurable robotic inspection system for quantitative NDE mapping is presented. The system consists of a fleet of wireless (802.11g) miniature robotic vehicles, each approximately 175 × 125 × 85 mm with magnetic wheels that enable them to inspect industrial structures such as storage tanks, chimneys and large diameter pipe work. The robots carry one of a number of payloads including a two channel MFL sensor, a 5 MHz dry coupled UT thickness wheel probe and a machine vision camera that images the surface. The system creates an NDE map of the structure overlaying results onto a 3D model in real time. The authors provide an overview of the robot design, data fusion algorithms (positioning and NDE) and visualization software.

Dobie, Gordon; Summan, Rahul; MacLeod, Charles; Pierce, Gareth; Galbraith, Walter [Centre for Ultrasonic Engineering, University of Strathclyde, 204 George Street, Glasgow, G1 1XW (United Kingdom)

2014-02-18T23:59:59.000Z

204

Remaining Sites Verification Package for the 100-B-18, 184-B Powerhouse Debris Pile, Waste Site Reclassification Form 2007-020  

SciTech Connect

The 100-B-18 Powerhouse Debris Pile contained miscellaneous demolition waste from the decommissioning activities of the 184-B Powerhouse. The debris covered an area roughly 15 m by 30 m and included materials such as concrete blocks, mixed aggregate/concrete slabs, stone rubble, asphalt rubble, traces of tar/coal, broken fluorescent lights, brick chimney remnants, and rubber hoses. In accordance with this evaluation, the verification sampling results support a reclassification of this site to Interim Closed Out. The results of verification sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2007-11-30T23:59:59.000Z

205

Preparation of radioactive targets for tandem accelerator experiments by high vacuum evaporation–condensation  

Science Journals Connector (OSTI)

Radioactive thin film targets have been prepared by high vacuum evaporation–condensation in the hot-lab facility of the University of Munich. Targets made by this technique are of high density and excellent smoothness, being well suited for experiments aimed at the production and spectroscopy of fission fragments. Cold crucible electron beam heating is the preferred method for evaporation of actinide isotopic material of sufficient abundance, for instance 230Th, 232Th, 233U, 235U, 238U and 239Pu. Exotic isotopes, which are available only in submilligram quantities, are processed in a micro-evaporator module consisting of a chimney-type crucible heated by low-tension electron bombardment. This set-up is characterised by a high collection efficiency and was used for the production of 244Pu and 10Be targets.

R. Grossmann; H.J. Maier; H.U. Friebel; D. Frischke

2002-01-01T23:59:59.000Z

206

Natural Ventilation | Department of Energy  

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

Natural Ventilation Natural Ventilation Natural Ventilation May 30, 2012 - 7:56pm Addthis Opening a window is a simple natural ventilation strategy. | Credit: ©iStockphoto/Simotion Opening a window is a simple natural ventilation strategy. | Credit: ©iStockphoto/Simotion What does this mean for me? If you live in a part of the country with cool nights and breezes, you may be able to cool your house with natural ventilation. If you're building a new home, design it to take advantage of natural ventilation. Natural ventilation relies on the wind and the "chimney effect" to keep a home cool. Natural ventilation works best in climates with cool nights and regular breezes. The wind will naturally ventilate your home by entering or leaving windows, depending on their orientation to the wind. When wind blows against your

207

ASSESSMENT OF HYDROCARBON SEEPAGE DETECTION METHODS ON THE FORT PECK RESERVATION, NORTHEAST MONTANA  

SciTech Connect

Surface exploration techniques have been employed in separate study areas on the Fort Peck Reservation in northeastern Montana. Anomalies associated with hydrocarbon seepage are documented in all three areas and a variety of surface exploration techniques can be compared. In a small area with established production, Head Gas and Thermal Desorption methods best match production; other methods also map depletion. In a moderate-size area that has prospects defined by 3D seismic data, Head Gas along with Microbial, Iodine, and Eh soil anomalies are all associated with the best hydrocarbon prospect. In a large area that contains many curvilinear patterns observed on Landsat images, that could represent micro-seepage chimneys, results are inconclusive. Reconnaissance mapping using Magnetic Susceptibility has identified a potential prospect; subsequent Soil Gas and Head Gas surveys suggest hydrocarbon potential. In the final year of this project the principle contractor, the Fort Peck Tribes, completed a second survey in the Wicape 3D Seismic Prospect Area (also known as Area 6 in Phase I of the project) and sampled several Landsat image features contained in the Smoke Creek Aeromag Anomaly Area (also known as Area 1 in Phase II of the project). Methods determined to be most useful in Phases I and II, were employed in this final Phase III of the study. The Southwest Wicape seismic anomaly was only partially confirmed. The abundant curvilinears proposed to be possible hydrocarbon micro-seepage chimneys in the Smoke Creek Area were not conclusively verified as such. Insufficient sampling of background data precludes affirmative identification of these mostly topographic Landsat features as gas induced soil and vegetation anomalies. However relatively higher light gas concentrations were found associated with some of the curvilinears. Based on the findings of this work the Assiniboine & Sioux Tribes of the Fort Peck Reservation intend to utilize surface hydrocarbon exploration techniques for future identification and confirmation of oil and gas prospects.

Lawrence M. Monson

2003-06-30T23:59:59.000Z

208

Major Oil Plays In Utah And Vicinity  

SciTech Connect

Utah oil fields have produced over 1.33 billion barrels (211 million m{sup 3}) of oil and hold 256 million barrels (40.7 million m{sup 3}) of proved reserves. The 13.7 million barrels (2.2 million m3) of production in 2002 was the lowest level in over 40 years and continued the steady decline that began in the mid-1980s. However, in late 2005 oil production increased, due, in part, to the discovery of Covenant field in the central Utah Navajo Sandstone thrust belt ('Hingeline') play, and to increased development drilling in the central Uinta Basin, reversing the decline that began in the mid-1980s. The Utah Geological Survey believes providing play portfolios for the major oil-producing provinces (Paradox Basin, Uinta Basin, and thrust belt) in Utah and adjacent areas in Colorado and Wyoming can continue this new upward production trend. Oil plays are geographic areas with petroleum potential caused by favorable combinations of source rock, migration paths, reservoir rock characteristics, and other factors. The play portfolios include descriptions and maps of the major oil plays by reservoir; production and reservoir data; case-study field evaluations; locations of major oil pipelines; identification and discussion of land-use constraints; descriptions of reservoir outcrop analogs; and summaries of the state-of-the-art drilling, completion, and secondary/tertiary recovery techniques for each play. The most prolific oil reservoir in the Utah/Wyoming thrust belt province is the eolian, Jurassic Nugget Sandstone, having produced over 288 million barrels (46 million m{sup 3}) of oil and 5.1 trillion cubic feet (145 billion m{sup 3}) of gas. Traps form on discrete subsidiary closures along major ramp anticlines where the depositionally heterogeneous Nugget is also extensively fractured. Hydrocarbons in Nugget reservoirs were generated from subthrust Cretaceous source rocks. The seals for the producing horizons are overlying argillaceous and gypsiferous beds in the Jurassic Twin Creek Limestone, or a low-permeability zone at the top of the Nugget. The Nugget Sandstone thrust belt play is divided into three subplays: (1) Absaroka thrust - Mesozoic-cored shallow structures, (2) Absaroka thrust - Mesozoic-cored deep structures, and (3) Absaroka thrust - Paleozoic-cored shallow structures. Both of the Mesozoic-cored structures subplays represent a linear, hanging wall, ramp anticline parallel to the leading edge of the Absaroka thrust. Fields in the shallow Mesozoic subplay produce crude oil and associated gas; fields in the deep subplay produce retrograde condensate. The Paleozoic-cored structures subplay is located immediately west of the Mesozoic-cored structures subplays. It represents a very continuous and linear, hanging wall, ramp anticline where the Nugget is truncated against a thrust splay. Fields in this subplay produce nonassociated gas and condensate. Traps in these subplays consist of long, narrow, doubly plunging anticlines. Prospective drilling targets are delineated using high-quality, two-dimensional and three-dimensional seismic data, forward modeling/visualization tools, and other state-of-the-art techniques. Future Nugget Sandstone exploration could focus on more structurally complex and subtle, thrust-related traps. Nugget structures may be present beneath the leading edge of the Hogsback thrust and North Flank fault of the Uinta uplift. The Jurassic Twin Creek Limestone play in the Utah/Wyoming thrust belt province has produced over 15 million barrels (2.4 million m{sup 3}) of oil and 93 billion cubic feet (2.6 billion m{sup 3}) of gas. Traps form on discrete subsidiary closures along major ramp anticlines where the low-porosity Twin Creek is extensively fractured. Hydrocarbons in Twin Creek reservoirs were generated from subthrust Cretaceous source rocks. The seals for the producing horizons are overlying argillaceous and clastic beds, and non-fractured units within the Twin Creek. The Twin Creek Limestone thrust belt play is divided into two subplays: (1) Absaroka thrust-Mesozoic-cored structures and (2) A

Thomas Chidsey

2007-12-31T23:59:59.000Z

209

T  

Office of Legacy Management (LM)

. . ~- - - Environmental . T r i t i u m S u r v e i l l a n c e f o r ; P r o j e c t R u l i s o n . -~ - Donald T.' Wruble 36411 Vernon E. Andrews George A. Boysen I n t r o d u c t i o r ! 1 I \ Project!Rui-isY-was t h e second n u c l e a r experiment conducted j o i n t l y by t h e U. S. Government and p r i v a t e i n d u s t r y t o i n v e s t i g a t e t h e f e a s i b i l i t y of u s i n g n u c l e a r exp&tb&?s t o s t i m u l a t e p r o d u c t i o n of n a t u r a l g a s f r o m a low- p e r m e a b i l i t y gas-bearinggf ormation by producing a zone of f r a c t u r e d r o c k and a t D ' i _ - 11 chimney" of rock rubbleg I 1 around and above t h e d e t o n a t i o n p o i n t . The v o i d s p a c e s U t h u s produced p r o v i d e d a reservqiq i n t o which t h e n a t u r a l g a s s f l o w . A Y Lcrhs s t a n d a r d gas w e l l s then d r i l r l e d t o t h e chimney, a l l o w i n g recovery o f t h e g a s . T h i s t e c h n i q u e w a s shown t o b e m

210

Natural Gas Variability In California: Environmental Impacts And Device  

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

Natural Gas Variability In California: Environmental Impacts And Device Natural Gas Variability In California: Environmental Impacts And Device Performance - Experimental Evaluation Of Installed Cooking Exhaust Fan Performance Title Natural Gas Variability In California: Environmental Impacts And Device Performance - Experimental Evaluation Of Installed Cooking Exhaust Fan Performance Publication Type Report Year of Publication 2011 Authors Singer, Brett C., William W. Delp, and Michael G. Apte Publisher Lawrence Berkeley National Laboratory City Berkeley, CA Keywords energy analysis and environmental impacts department Abstract The installed performance of cooking exhaust fans was evaluated through residential field experiments conducted on a sample of 15 devices varying in design and other characteristics. The sample included two rear downdraft systems, two under-cabinet microwave over range units, three different installations of an under-cabinet model with grease screens across the bottom and no capture hood, two devices with grease screens covering the bottom of a large capture hood (one under-cabinet, one wall-mount chimney), four under-cabinet open hoods, and two open hoods with chimney mounts over islands. Performance assessment included measurement of airflow and sound levels across fan settings and experiments to quantify the contemporaneous capture efficiency for the exhaust generated by natural gas cooking burners. Capture efficiency is defined as the fraction of generated pollutants that are removed through the exhaust and thus not available for inhalation of household occupants. Capture efficiency was assessed for various configurations of burner use (e.g., single front, single back, combination of one front and one back, oven) and fan speed setting. Measured airflow rates were substantially lower than the levels noted in product literature for many of the units. This shortfall was observed for several units costing more than $1000. Capture efficiency varied widely (from < 5 percent to roughly 100 percent) across devices and across conditions for some devices. As expected, higher capture efficiencies were achieved with higher fan settings and the associated higher air flow rates. In most cases, capture efficiencies were substantially higher for rear burners than for front burners. The best and most consistent performance was observed for open hoods that covered all cooktop burners and operated at higher airflow rates. The lowest capture efficiencies were measured when a front burner was used with a rear backdraft system or with lowest fan setting for above-the-range systems that do not cover the front burners.

211

Experimental Evaluation of Installed Cooking Exhaust Fan Performance  

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

Experimental Evaluation of Installed Cooking Exhaust Fan Performance Experimental Evaluation of Installed Cooking Exhaust Fan Performance Title Experimental Evaluation of Installed Cooking Exhaust Fan Performance Publication Type Report LBNL Report Number LBNL-4183E Year of Publication 2010 Authors Singer, Brett C., William W. Delp, and Michael G. Apte Publisher Lawrence Berkeley National Laboratory City Berkeley Keywords airflow & pollutant transport group, cooktop, energy analysis and environmental impacts department, gas burners, indoor air quality, indoor environment department, kitchen, nitrogen dioxide, oven, pollutant emissions, range hood, residential, source control, task ventilation, technology, sustainability and impact assessment group Abstract The installed performance of cooking exhaust fans was evaluated through residential field experiments conducted on a sample of 15 devices varying in design and other characteristics. The sample included two rear downdraft systems, two under-cabinet microwave over range (MOR) units, three different installations of an under-cabinet model with grease screens across the bottom and no capture hood, two devices with grease screens covering the bottom of a large capture hood (one under-cabinet, one wall-mount chimney), four under-cabinet open hoods, and two open hoods with chimney mounts over islands. Performance assessment included measurement of airflow and sound levels across fan settings and experiments to quantify the contemporaneous capture efficiency for the exhaust generated by natural gas cooking burners. Capture efficiency is defined as the fraction of generated pollutants that are removed through the exhaust and thus not available for inhalation of household occupants. Capture efficiency (CE) was assessed for various configurations of burner use (e.g. single front, single back, combination of one front and one back, oven) and fan speed setting. Measured airflow rates were substantially lower than the levels noted in product literature for many of the units. This shortfall was observed for several units costing in excess of $1000. Capture efficiency varied widely (from <5% to roughly 100%) across devices and across conditions for some devices. As expected, higher capture efficiencies were achieved with higher fan settings and the associated higher air flow rates. In most cases, capture efficiencies were substantially higher for rear burners than for front burners. The best and most consistent performance was observed for open hoods that covered all cooktop burners and operated at higher airflow rates. The lowest capture efficiencies were measured when a front burner was used with a rear backdraft system or with lowest fan setting for above the range systems that do not cover the front burners.

212

TITLE  

Office of Legacy Management (LM)

Hydrologic Processes and Hydrologic Processes and Radionuclide Distribution in a Cavity and Chimney Produced by the Cannikin Nuclear Explosion I Amchitka Island, Alaska By HANS C. C M S S E N H Y D R O L O G Y O F N U C L E A R T E S T S I T E S G E O L O G I C A L S U R V E Y P R O F E S S I O N A L P A P E R 7 1 2 - D Prepared on behay o J the US. Energy Research and Deuclopment Administration U N I T E D S T A T E S G O V E R N M E N T P R I N T I N G O F F I C E . W A S H I N G T O N : 1978 UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D. ANDRUS. sectwary GEOLOGICAL SURVEY V. E. McKelvey. Direcror Library of Conlresr Cnrriolrtn# tn Puhltcrtban Udtr Ct*aaasn. Wnnr C. WydrOlo~nC procesbes and radionucl~dc distributnon in a cavity and chnmncv praduccd by rna Cannukin nuslssr ~ n n l u r r u n . h m c n n u r islrnd. AI;n*U*. (Hydrolory o f nuclssr tcat ritsal (Caoloyicsl Survey Profeuionai P

213

Bats  

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

Bats Bats Nature Bulletin No. 147 March 20, 1948 Forest Preserve District of Cook County William N. Erickson, President Roberts Mann, Supt of Conservation BATS Flying squirrels only glide. Bats are the only fur bearing animals that truly fly, and they've been doing it for at least 50 million years Twisting, looping and zig-zagging through the air, at dusk and dawn, they catch flying insects more skillfully than the swallow or the chimney swift. Each twist and turn means another insect caught, A bat can consume one-half its weight in insects in a single twilight. Harmful? No, We have one in Trailside Museum that likes to be handled and fed mealworms. They do not get in women's hair. They do not distribute our kind of bed bugs. They are not blind; even in daytime they see fairly well. But they can fly through timber or the narrow twisting passages of caves in total darkness because they have radar, Bats have large specialized ears, Their squeak is pitched so high that few people can hear it, As they fly they also make a supersonic squeak about 30 times per second and are guided by the echoes bouncing back from obstacles.

214

Hummingbirds  

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

Hummingbirds Hummingbirds Nature Bulletin Mo. 347-A May 31, 1969 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation HUMMINBIRDS Hummingbirds, found only in the Western Hemisphere, are undoubtedly the most remarkable birds in the world. They are not only unique for their brilliant iridescent plumage, manner of flying and way of feeding, but also for their great variation in size, form, color, habits and other attributes. Many species are midgets no larger than bumblebee, weighing no more than a dime, but the largest is about the size of a chimney swift -- to which they are distantly related. One species has a bill only one-quarter inch in length, while that of another is almost five inches long -- greater than the combined length of its head, neck, body and tail. The bill is usually straight or nearly so, awl-shaped and needle-pointed, but in one species it curves downward like a sickle and in a few others it curves upward. The wings and tail are equally variable.

215

Analysis of transient temperature distribution in oil shale due to heat source propagating in retort  

Science Journals Connector (OSTI)

The initial?boundary?value problem for the transient temperature fields in oil shale which is heated by a propagating combustionflame in an i n s i t u retort chimney is formulated and solved analytically. The heat source of the flame is represented by a Gaussian distribution which models the average statistical variations in radial and axial flame extensions and is assumed to build up to maximum strength in accordance with a temporal relaxation process. The transient temperature fields in the oil shale surrounding the retort are calculated and discussed with respect to their spatial variations and dependence on the flamerelaxation time. The theoretical temperature distributions are shown to be consistent with those observed experimentally. The high?temperature core extends less than a retort radius into the surrounding shale bed. This result has implications for (i) the i n s i t u retort design and (ii) the environmental impact of i n s i t u retorts. It appears that the spacing between neighboring retorts can be reduced and that the thermal effects of retorts on the environment are less severe than previously anticipated.

H. E. Wilhelm; J. B. DuBow; S. H. Hong

1978-01-01T23:59:59.000Z

216

Comparison of the Acceptability of Various Oil Shale Processes  

SciTech Connect

While oil shale has the potential to provide a substantial fraction of our nation's liquid fuels for many decades, cost and environmental acceptability are significant issues to be addressed. Lawrence Livermore National Laboratory (LLNL) examined a variety of oil shale processes between the mid 1960s and the mid 1990s, starting with retorting of rubble chimneys created from nuclear explosions [1] and ending with in-situ retorting of deep, large volumes of oil shale [2]. In between, it examined modified-in-situ combustion retorting of rubble blocks created by conventional mining and blasting [3,4], in-situ retorting by radio-frequency energy [5], aboveground combustion retorting [6], and aboveground processing by hot-solids recycle (HRS) [7,8]. This paper reviews various types of processes in both generic and specific forms and outlines some of the tradeoffs for large-scale development activities. Particular attention is given to hot-recycled-solids processes that maximize yield and minimize oil shale residence time during processing and true in-situ processes that generate oil over several years that is more similar to natural petroleum.

Burnham, A K; McConaghy, J R

2006-03-11T23:59:59.000Z

217

Evaporite karst in the rolling plains and High Plains of Texas--Process and petrographic evidence  

SciTech Connect

Permian halite and anhydrite have been extensively dissolved by ground water in the shallow subsurface of the Texas Panhandle. Large caves in halite have collapsed, producing breccia chimneys. In contrast, stratiform halite dissolution has resulted in passive letdown of overlying beds. Residues left after halite dissolution can be identified by wavy lamination formed by top-to-bottom accretion and by distinctive limpid, multifaceted dolomite. In the deeper, more saline parts of the dissolution zone, anhydrite has been replaced volume-for-volume by gypsum, causing large amounts of calcium sulfate to be released. This regime is dominated by gypsum precipitation forming pore-filling cements and fibrous veins along fractures caused by salt dissolution. In the more flushed parts of the dissolution zone, gypsum is dissolved, further enhancing permeability. Paleo-dissolution horizons can be identified because (1) they are discordant with the active dissolution zone, demonstrating that they formed at times of lower topographic relief and (2) they are marked by silicification and calcitization of gypsum. Evaporite dissolution has a negative impact on water quality, and better understanding of dissolution processes has implications for design of remediation projects to decrease natural brine discharge into ground-water supplies.

Hovorka, S.D. (Univ of Texas, Austin, TX (United States). Bureau of Economic Geology)

1993-02-01T23:59:59.000Z

218

Reconnaissance geological and mineral resource map of northern Sierra Madre Occidental, Mexico  

SciTech Connect

The northern Sierra Madre Occidental (SMO) map (scale 1:500,000) comprises 305,000 km/sup 2/ in the states of Chihuahau and Sonora. The centrally-located plateau section is divided into an upper, predominantly rhyolitic sequence, overlying an andesite-rich interval, directly correlatable with Tertiary volcanic units in central and southern SMO, respectively (Clark, 1983; 1984). Precambrian rocks occur in both flanks of SMO, either in the subsurface or surface exposures. They are succeeded by Early and Late Paleozoic sedimentary strata in Sonora and by a more discontinuous sequence in western Chihuahua. Mesozoic strata are dominated by Cretaceous carbonate sequences in central Chihuahua, and by late Triassic - Early Jurassic continental and Jurassic magmatic arc deposits in Sonora. Late Mesozoic - Early Cenozoic batholiths were emplaced in numerous localities in Sonora, whereas only isolated granitoid stocks are exposed in Chihuahua. Widespread lavas of basaltic composition are Late Tertiary to Quaternary in age. Late Cenozoic unconsolidated clastic deposits fill basins and constitute the coastal plain on the west. The main mineralizing epoch occurred in Late Cretaceous - Early Tertiary time, is aligned in northwesterly-trending belts and included numerous porphyry (Cu-Mo) deposits, scattered contact metasomatic (Cu-W) ores and a fissure-vein (Ag-Au) assemblage in the western margin; a (Pb-Zn-Ag) assemblage in fissure-veins and manto-chimney deposits, manganese and volcanogenic uranium ores in the eastern flank. Important industrial minerals and rocks include graphite, fluorspar and building materials.

Clark, K.F.

1985-01-01T23:59:59.000Z

219

The HIE-ISOLDE Vacuum System  

E-Print Network (OSTI)

The High Intensity and Energy Isolde (HIE-Isolde) project aims at increasing the energy and intensity of the radioactive ion beams (RIB) delivered by the present Rex-Isolde facility. Energy up to 10MeV/amu will be reached by a new post-accelerating, superconducting (SC) linac. Beam will be delivered via a HEBT to three experimental stations for nuclear physics. To keep the SC linac compact and avoid cold-warm transitions, the cryomodules feature a common beam and insulation vacuum. Radioactive ion beams require a hermetically sealed vacuum, with transfer of the effluents to the nuclear ventilation chimney. Hermetically sealed, dry, gas transfer vacuum pumps are preferred to gas binding pumps, for an optimized management of radioactive contamination risk during maintenance and intervention. The vacuum system of the SC-linac is isolated by two fast valves, triggered by fast reacting cold cathode gauges installed on the warm linac, the HEBT and the experimental stations. Rough pumping is distributed, while the H...

Vandoni, G; Radwan, K; Chiggiato, P

2014-01-01T23:59:59.000Z

220

GRI`s venting research program: Activities at Battelle and A.G.A. Laboratories (1988-1994). Final report, July 1988-September 1994  

SciTech Connect

The objective of this program was to develop guidelines for the practical and safe venting of flue gases from mid- and high-efficiency gas-fired appliances. The introduction of a greater diversity of appliances led to the need for revised venting guidelines. Through interaction with a GRI-established Technical Advisory Group, the venting program staff developed R&D tools and methods to analyze the venting requirements of gas appliances. Venting guidelines were developed and have been included in all manufacturers` furnace installation instructions since 1990. Guidelines were submitted to the National Fuel Gas Code (NFGC), accepted by the NFPA, and published in August 1992. Other combustion and ventilation air supply, vent terminals, VENT-II computer model, masonry chimneys, and commercial installations. The program has yielded a consumer savings estimated at $700 million, based on the implementation of the new venting guidelines that prevent vent corrosion and that provide consumers with subsequent savings in equipment repair and replacement costs. The GRI Venting Research Program also has enhanced consumer safety by helping ensure proper vent design and installation.

Rutz, A.L.; Paul, D.D.; DeWerth, D.W.; Borgeson, R.A.

1994-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "labarge hogsback chimney" from the National Library of EnergyBeta (NLEBeta).
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221

Galactic Worm 123.4-1.5: A Mushroom-shaped HI Cloud  

E-Print Network (OSTI)

The Dominion Radio Astrophysical Observatory's Synthesis Telescope provides the highest resolution data (1 arcmin and 0.82 km/s) to date of an HI worm candidate. Observed as part of the Canadian Galactic Plane Survey, mushroom-shaped GW 123.4-1.5 extends only a few hundred parsecs, contains ~10^5 solar masses of neutral hydrogen, and appears unrelated to a conventional shell or chimney structure. Our preliminary Zeus-2d models use a single off-plane explosion with a modest (~10^{51} ergs) energy input. These generic simulations generate, interior to an expanding outer blast wave, a buoyant cloud whose structure resembles the morphology of the observed feature. Unlike typical model superbubbles, the stem can be narrow because its width is not governed by the pressure behind the blast wave nor the disk scale height. Using this type of approach it should be possible to more accurately model the thin stem and other details of GW 123.4-1.5 in the future.

Canadian Galactic Plane Survey; :; Jayanne English; A. Russ Taylor; Sergey Y. Mashchenko; Judith A. Irwin; Shantanu Basu; Doug Johnstone

2000-03-06T23:59:59.000Z

222

The Escape of Ionizing Photons from OB Associations in Disk Galaxies Radiation Transfer Through Superbubbles  

E-Print Network (OSTI)

By solving the time-dependent radiation transfer problem of stellar radiation through evolving superbubbles within a smoothly varying H I distribution, we have estimated the fraction of ionizing photons emitted by OB associations that escapes the H I disk of our Galaxy. We considered a coeval star-formation history and a Gaussian star-formation history with a time spread sigma_t = 2 Myr. We find that the shells of the expanding superbubbles quickly trap or attenuate the ionizing flux, such that most of the escaping radiation escapes shortly after the formation of the superbubble. Superbubbles of large associations can blowout of the H I disk and form dynamic chimneys, which allow the ionizing radiation directly to escape the H I disk. However, blowout occurs when the ionizing photon luminosity has dropped well below the association's maximum luminosity. For the coeval star-formation history, the fraction of photons that escape each side of the disk in the solar vicinity is f_esc approx 6% (the total fraction ...

Dove, J B; Ferrara, A; Dove, James B.; Ferrara, Andrea

1999-01-01T23:59:59.000Z

223

Bubbles in galactic haloes  

E-Print Network (OSTI)

We briefly discuss a possible interconnection of vertical HI structures observed in the Milky Way Galaxy with large scale blow-outs caused by the explosions of multiple clustered SNe. We argue that the observed OB associations can produce only about 60 such events, or approximately one chimney per 3 kpc$^2$ within the solar circle. We also discuss the overall properties of HI shells in nearby face-on galaxies and the distribution of H$\\alpha$ and dust in edge-on galaxies. We argue that the presence of dust in galactic haloes may indicate that radiation pressure is the most probable mechanism capable of transporting dust to large heights above the galactic plane. In order to make this possible, the galactic magnetic field must have a strong vertical component. We mention that SNe explosions can initiate the Parker instability which in turn creates large scale magnetic loops with a strong vertical component. Recent observations of nearby edge-on galaxies favour this suggestion.

Shchekinov, Yu A; Schröer, A; Steinacker, A; Shchekinov, Yu. A.

2001-01-01T23:59:59.000Z

224

Bubbles in galactic haloes  

E-Print Network (OSTI)

We briefly discuss a possible interconnection of vertical HI structures observed in the Milky Way Galaxy with large scale blow-outs caused by the explosions of multiple clustered SNe. We argue that the observed OB associations can produce only about 60 such events, or approximately one chimney per 3 kpc$^2$ within the solar circle. We also discuss the overall properties of HI shells in nearby face-on galaxies and the distribution of H$\\alpha$ and dust in edge-on galaxies. We argue that the presence of dust in galactic haloes may indicate that radiation pressure is the most probable mechanism capable of transporting dust to large heights above the galactic plane. In order to make this possible, the galactic magnetic field must have a strong vertical component. We mention that SNe explosions can initiate the Parker instability which in turn creates large scale magnetic loops with a strong vertical component. Recent observations of nearby edge-on galaxies favour this suggestion.

Yu. A. Shchekinov; R. -J. Dettmar; A. Schroeer; A. Steinacker

2001-02-09T23:59:59.000Z

225

Krzeslawice (Krakow, Poland) Boilerhouse Refurbishing Study  

SciTech Connect

Krakow, Poland suffers from major air pollution caused by: local uses of coal for space heating, traffic, industry, and that transported from large down wind industrial regions. Space heating is mostly coal-based, but there is some use of natural gas and electricity. Major sources of heating include: district heating, individual apartment house boilers, stoves for heating individual rooms of apartments, and electric heating units. So-called low emissions sources (i.e., low stacks or chimneys) account for about 40% of the emissions of air pollutants in Krakow and for maximum ground level concentrations of pollutants that exceed Polish standards by factors of 2 - 3. Low emissions sources primarily provide space heating and are largely coal-based. They include 2021 hand-fired fixed grate boilers in some of the apartment houses, 100,000 room heating stoves, and 227 overfeed traveling grate stokers (80% with cyclones for particulate control). The latter are associated with the district heating system, and a few also supply industrial steam. President Bush, in 1990, promised U.S. assistance in reduction of air pollution in Krakow. Subsequently, the Krakow Clean Fossil Fuels and Energy Efficiency Program was established by the U.S. Department of Energy (DOE) to assist in air pollution reduction by means of U.S./Polish joint ventures that will function in a free market economy to supply appropriate equipment, materials or services.

Blinn, M.B. [Burns and Roe Services Corp., Pittsburgh, PA (United States); Kemeny, P. [Burns and Roe Co., Oradell, NJ (United States)

1993-12-31T23:59:59.000Z

226

Magnetic Landscape of Sun's Polar Region  

E-Print Network (OSTI)

We present the magnetic landscape of the polar region of the Sun that is unprecedented in terms of high spatial resolution, large field of view, and polarimetric precision. These observations were carried out with the Solar Optical Telescope aboard \\emph{Hinode}. Using a Milne-Eddington inversion, we found many vertically-oriented magnetic flux tubes with field strength as strong as 1 kG that are scattered in latitude between 70-90 degree. They all have the same polarity, consistent with the global polarity of the polar region. The field vectors were observed to diverge from the center of the flux elements, consistent with a view of magnetic fields that expand and fan out with height. The polar region is also covered with ubiquitous horizontal fields. The polar regions are the source of the fast solar wind channelled along unipolar coronal magnetic fields whose photospheric source is evidently rooted in the strong field, vertical patches of flux. We conjecture that vertical flux tubes with large expansion around the photosphere-corona boundary serve as efficient chimneys for Alfven waves that accelerate the solar wind.

S. Tsuneta; K. Ichimoto; Y. Katsukawa; B. W. Lites; K. Matsuzaki; S. Nagata; D. Orozco Suarez; T. Shimizu; M. Shimojo; R. A. Shine; Y. Suematsu; T. K. Suzuki; T. D. Tarbell; A. M. Title

2008-08-08T23:59:59.000Z

227

A new design of wind tower for passive ventilation in buildings to reduce energy consumption in windy regions  

Science Journals Connector (OSTI)

Abstract In today’s world, the significance of energy and energy conservation is a common knowledge. Wind towers can save the electrical energy used to provide thermal comfort during the warm months of the year, especially during the peak hours. In this paper, we propose a new design for wind towers. The proposed wind towers are installed on top of the buildings, in the direction of the maximum wind speed in the region. If the desired wind speed is accessible in several directions, additional wind towers can be installed in several positions. The proposed wind tower can also rotate and set itself in the direction of the maximum wind speed. In the regions where the wind speed is low, to improve the efficiency of the system a solar chimney or a one-sided wind tower can be installed in another part of the building in the opposite direction. Using transparent materials in the manufacturing of the proposed wind towers improves the use of natural light inside the building. The major advantage of wind towers is that they are passive systems requiring no energy for operation. Also, wind towers reduce electrical energy consumption and environmental pollution.

A.R. Dehghani-sanij; M. Soltani; K. Raahemifar

2015-01-01T23:59:59.000Z

228

Measurement of particulate densities in air  

Science Journals Connector (OSTI)

Clean air is one of the most important issues that govern the health of all live forms. However presently there are not many quick and simple methods for measuring impurities like particulates in air. These impurities have an enormous diversity in their physical and chemical structure. They may be unburned carbon particles from a diesel engine exhaust and chimney pollen grains in the spring air or asbestos in a factory. This paper shows that changes in the composition of the air cause a change in the speed of sound. Therefore by measuring the change in the speed of sound it is possible to monitor the density of particulates in the air. Preliminary tests are conducted on various smoke–air mixtures. The results demonstrate that this methodology is very sensitive to any changes in the composition of the air. Its implementation is very simple and efficient and costs much less than the conventional method currently used in the auto industry. This technique will be used to calculate the mass density of the particulates resulting from a diesel engine and results thus obtained will be compared with those calculated using other methods.

2001-01-01T23:59:59.000Z

229

Transitional regimes of natural convection in a differentially heated cubical cavity under the effects of wall and molecular gas radiation  

SciTech Connect

The transition to unsteadiness and the dynamics of weakly turbulent natural convection, coupled to wall or gas radiation in a differentially heated cubical cavity with adiabatic lateral walls, are studied numerically. The working fluid is air with small contents of water vapor and carbon dioxide whose infrared spectral radiative properties are modelled by the absorption distribution function model. A pseudo spectral Chebyshev collocation method is used to solve the flow field equations and is coupled to a direct ray tracing method for radiation transport. Flow structures are identified by means of either the proper orthogonal decomposition or the dynamic mode decomposition methods. We first retrieve the classical mechanism of transition to unsteadiness without radiation, characterized by counter-rotating streamwise-oriented vortices generated at the exit of the vertical boundary layers. Wall radiation through a transparent medium leads to a homogenization of lateral wall temperatures and the resulting transition mechanism is similar to that obtained with perfectly conducting lateral walls. The transition is due to an unstable stratification upstream the vertical boundary layers and is characterized by periodically oscillating transverse rolls of axis perpendicular to the main flow. When molecular gas radiation is accounted for, no periodic solution is found and the transition to unsteadiness displays complex structures with chimneys-like rolls whose axes are again parallel to the main flow. The origin of this instability is probably due to centrifugal forces, as suggested previously for the case without radiation. Above the transition to unsteadiness, at Ra = 3 × 10{sup 8}, it is shown that both wall and gas radiation significantly intensify turbulent fluctuations, decrease the thermal stratification in the core of the cavity, and increase the global circulation.

Soucasse, L.; Rivière, Ph.; Soufiani, A., E-mail: anouar.soufiani@ecp.fr [CNRS, UPR 288, Laboratoire EM2C, 92290 Châtenay-Malabry (France); École Centrale Paris, 92290 Châtenay-Malabry (France)] [France; Xin, S. [CNRS/INSA-Lyon, UMR 5008, CETHIL, 69621 Villeurbanne (France)] [CNRS/INSA-Lyon, UMR 5008, CETHIL, 69621 Villeurbanne (France); Le Quéré, P. [CNRS, UPR 3251, LIMSI, 91403 Orsay Cedex (France)] [CNRS, UPR 3251, LIMSI, 91403 Orsay Cedex (France)

2014-02-15T23:59:59.000Z

230

Experiment and Numerical Simulation of Bubble Behaviors in Argon Gas Injection Into Lead-Bismuth Pool  

SciTech Connect

In a lead-bismuth alloy (45%Pb-55%Bi) cooled direct contact boiling water fast reactor (PBWFR), steam can be produced by direct contact of feed water with primary Pb-Bi coolant in the upper core plenum, and Pb-Bi coolant can be circulated by buoyancy forces of steam bubbles. As a basic study to investigate the two-phase flow characteristics in the chimneys of PBWFR, a two-dimensional two-phase flow was simulated by injecting argon gas into Pb-Bi pool in a rectangular vessel (400 mm in length, 1500 mm in height, 50 mm in width), and bubble behaviors were investigated experimentally. Bubble sizes, bubble rising velocities and void fractions were measured using void probes. Argon gas was injected through five nozzles of 4 mm in diameter into Pb-Bi at two locations. The experimental conditions are the pressure of atmospheric pressure, Pb-Bi temperatures of 443 K, and the flow rate of injection Ar gas is 10, 20, and 30 NL/min. The measured bubble rising velocities were distributed in the range from 1 to 3 m/s. The average velocity was about 0.6 m/s. The measured bubble chord lengths were distributed from 1 mm up to 30 mm. The average chord length was about 7 mm. An analysis was performed by two-dimensional and two-fluid model. The experimental results were compared with the analytical results to evaluate the validity of the analytical model. Although large diameter bubbles were observed in the experiment, the drag force model for spherical bubbles performed better for simulation of the experimental result because of high surface tension force of Pb-Bi. (authors)

Yumi Yamada [Advanced Reactor Technology Company, Ltd. (Japan); Toyou Akashi; Minoru Takahashi [Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550 (Japan)

2006-07-01T23:59:59.000Z

231

Lithologic and structural controls of limestone-hosted Pb-Zn-Ag mineralization in Chihuahua, Mexico  

SciTech Connect

The state of Chihuahua contains some of the most important limestone-hosted ore deposits in Mexico. The best example are Santa Eulalia and Naica which together have produced 53 million tons or ore averaging 7.7% Pb, 6.4% Zn, and 280 g/ton Ag. These deposits occur as mantos and chimneys often accompanied by calc-silicates. Among the most critical questions in this type of deposit is the control that the limestone-host exerts on the mineralizing process. Here the authors present the first detailed data on the stratigraphic and lithologic character of the limestone-hosts at Naica and Santa Eulalia. All ore at Naica and Santa Eulalia is hosted by micrites, biomicrites and biosparites indicative of generally quiet marine deposition. The authors work suggests that the western edge of the this trough might be a low angle, east dipping ramp which extends below the Sierra Madre Occidental. The primary permeability of the limestone that hosts Naica and Santa Eulalia is in the micro to nanodarcy range. The effective permeability has been augmented by 3 or 4 stages of micro-fracturing. Most of the ore is controlled by these fractures and by felsic dikes, which in cases are mostly endoskarn. Stylolites also appear to have exerted a control on the mineralizing process. Numerous instances of alteration and recrystallization confined to one side of a horizontal stylolite have been noted. At Santa Eulalia, horizontal stylolites have controlled the emplacement of massive sulfide mantos, suggesting that the mineralizing process was rather passive.

Lofquist, D.J.; Ruiz, J.

1985-01-01T23:59:59.000Z

232

Lignite Fuel Enhancement  

SciTech Connect

The Design Team continues to conference this quarter albeit not as often. Primary focus this quarter is the continued procurement of material, receiving, and construction/installation. Phase 1 extension recommendation, and subsequent new project estimate. Forms 424 and 4600 were submitted to Ms. Zysk. The NETL technology team subsequently agreed that the increase is justified and made their recommendation to DOE HQ. All major mechanical equipment was delivered this quarter. Three hot water in-bed coils are all that remains for delivery. Two of the five are installed above the dryer air distribution bed. The dryer, baghouse, bucket elevator, control room, exhaust fan, process ductwork, and piping have all been installed. The mezzanine level over the inlet ductwork for access to the dryer was installed. Instrumentation was delivered and locations were identified. Cable is being pulled and connections made from the Control Room to the Motor Control Center. ''Emergency Stop'' equipment logic conditions were discussed and finalized. The functional description was competed and reviewed with Honeywell Controls. Piping & Instrument diagrams are completed. Some electrical schematics have been delivered for equipment south of Q-line. Dry & Wet coal conveyors are not completed. The exhaust chimney was installed. An Open House and ribbon cutting took place on August 9th. GRE project manager gave a presentation of the technology. Joe Strakey, NETL, also spoke. The Open House was attended by Governor Hoevon and Senator Conrad who also spoke about Clean Coal and helped kick-off Blue Flint ethanol and a potential Liquefaction plant. The deign team met the following day to discuss test plan and progress update. Headwaters Energy Incorporated also attended the Open House. A meeting was conducted with them to begin planning for the marketing and finalize our memorandum of understanding. Headwaters still plans to contact all US lignite plants and all bituminous plants who have switched to PRB. Major pieces of equipment received this quarter included the Dryer, Exhaust Fan, additional duct work, and control cabinets.

Charles Bullinger

2005-10-03T23:59:59.000Z

233

Ejection of Supernova-Enriched Gas From Dwarf Disk Galaxies  

E-Print Network (OSTI)

We examine the efficiency with which supernova-enriched gas may be ejected from dwarf disk galaxies, using a methodology previously employed to study the self-enrichment efficiency of dwarf spheroidal systems. Unlike previous studies that focused on highly concentrated starbursts, in the current work we consider discrete supernova events spread throughout various fractions of the disk. We model disk systems having gas masses of 10^8 and 10^9 solar masses with supernova rates of 30, 300, and 3000 per Myr. The supernova events are confined to the midplane of the disk, but distributed over radii of 0, 30, and 80% of the disk radius, consistent with expectations for Type II supernovae. In agreement with earlier studies, we find that the enriched material from supernovae is largely lost when the supernovae are concentrated near the nucleus, as expected for a starburst event. In contrast, however, we find the loss of enriched material to be much less efficient when the supernovae occur over even a relatively small fraction of the disk. The difference is due to the ability of the system to relax following supernova events that occur over more extended regions. Larger physical separations also reduce the likelihood of supernovae going off within low-density "chimneys" swept out by previous supernovae. We also find that, for the most distributed systems, significant metal loss is more likely to be accompanied by significant mass loss. A comparison with theoretical predications indicates that, when undergoing self-regulated star formation, galaxies in the mass range considered shall efficiently retain the products of Type II supernovae.

P. Chris Fragile; Stephen D. Murray; Douglas N. C. Lin

2004-08-24T23:59:59.000Z

234

Tritium Transport at the Rulison Site, a Nuclear-stimulated Low-permeability Natural Gas Reservoir  

SciTech Connect

The U.S. Department of Energy (DOE) and its predecessor agencies conducted a program in the 1960s and 1970s that evaluated technology for the nuclear stimulation of low-permeability natural gas reservoirs. The second project in the program, Project Rulison, was located in west-central Colorado. A 40-kiltoton nuclear device was detonated 2,568 m below the land surface in the Williams Fork Formation on September 10, 1969. The natural gas reservoirs in the Williams Fork Formation occur in low permeability, fractured sandstone lenses interbedded with shale. Radionuclides derived from residual fuel products, nuclear reactions, and activation products were generated as a result of the detonation. Most of the radionuclides are contained in a cooled, solidified melt glass phase created from vaporized and melted rock that re-condensed after the test. Of the mobile gas-phase radionuclides released, tritium ({sup 3}H or T) migration is of most concern. The other gas-phase radionuclides ({sup 85}Kr, {sup 14}C) were largely removed during production testing in 1969 and 1970 and are no longer present in appreciable amounts. Substantial tritium remained because it is part of the water molecule, which is present in both the gas and liquid (aqueous) phases. The objectives of this work are to calculate the nature and extent of tritium contamination in the subsurface from the Rulison test from the time of the test to present day (2007), and to evaluate tritium migration under natural-gas production conditions to a hypothetical gas production well in the most vulnerable location outside the DOE drilling restriction. The natural-gas production scenario involves a hypothetical production well located 258 m horizontally away from the detonation point, outside the edge of the current drilling exclusion area. The production interval in the hypothetical well is at the same elevation as the nuclear chimney created by the detonation, in order to evaluate the location most vulnerable to tritium migration.

C. Cooper; M. Ye; J. Chapman

2008-04-01T23:59:59.000Z

235

Recommended OSC design and analysis of AMTEC power system for outer-planet missions  

SciTech Connect

The paper describes OSC designs and analyses of AMTEC cells and radioisotope power systems for possible application to NASA{close_quote}s Europa Orbiter and Pluto Kuiper Express missions, and compares their predicted performance with JPL{close_quote}s preliminary mission goals. The latest cell and generator designs presented here were the culmination of studies covering a wide variety of generator configurations and operating parameters. The many steps and rationale leading to OSC{close_quote}s design evolution and materials selection were discussed in earlier publications and will not be repeated here except for a description of OSC{close_quote}s latest design, including a recent heat source support scheme and cell configuration that have not been described in previous publications. As shown, that heat source support scheme eliminates all contact between the heat source and the AMTEC (Alkali Metal Thermal-to-Electrical Conversion) cells, which simplifies the generator{close_quote}s structural design as well as its fabrication and assembly procedure. An additional purpose of the paper is to describe a revised cell design and fabrication procedure which represent a major departure from previous OSC designs. Previous cells had a uniform diameter, but in the revised design the cell wall beyond the BASE tubes has a greatly reduced diameter. The paper presents analytical performance predictions which show that the revised ({open_quotes}chimney{close_quotes}) cell design yields substantially higher efficiencies than the previous (cylindrical) design. This makes it possible to meet and substantially exceed the JPL-stipulated EOM power goal with four instead of six General Purpose Heat Source (GPHS) modules, resulting in a one-third reduction in the heat source mass, cost, and fuel requirements. OSC{close_quote}s performance predictions were based on its techniques for the coupled thermal, electrical, and fluid flow analyses of AMTEC generators. Those analytical techniques have been partially validated by tests of prototypic test assemblies designed by OSC, built by AMPS, and tested by AFRL. The analytical results indicate that the OSC power system design, operating within the stipulated evaporator and clad temperature limits and well within its mass goals, can yield EOM power outputs and system efficiencies that substantially exceed the JPL-specified goals for the Europa and Pluto missions. However, those results only account for radioisotope decay. Other degradation mechanisms are still under study, and their short-and long-term effects must be quantified and understood before final conclusions about the adequacy and competitiveness of the AMTEC system can be drawn. {copyright} {ital 1999 American Institute of Physics.}

Schock, A.; Noravian, H.; Or, C.; Kumar, V. [Orbital Sciences Corporation (OSC), 20301 Century Boulevard, Germantown, Maryland 20874 (United States)

1999-01-01T23:59:59.000Z

236

REDUCING RISK IN LOW-PERMEABILITY GAS FORMATIONS: UNDERSTANDING THE ROCK/FLUID CHARACTERISTICS OF ROCKY MOUNTAIN LARAMIDE BASINS  

SciTech Connect

An anomalous velocity model was constructed for the Wind River Basin (WRB) based on {approx}2000 mi of 2-D seismic data and 175 sonic logs, for a total of 132,000 velocity/depth profiles. Ten cross sections were constructed through the model coincident with known gas fields. In each cross section, an intense, anomalously slow velocity domain coincided with the gas-productive rock/fluid interval. The anomalous velocity model: (1) Easily isolates gas-charged rock/fluid systems characterized by anomalously slow velocities and water-rich rock/fluid systems characterized by normal velocities; and (2) Delineates the regional velocity inversion surface, which is characterized by steepening of the Ro/depth gradient, a significant increase in capillary displacement pressure, a significant change in formation water composition, and acceleration of the reaction rate of smectite-to-illite diagenesis in mixed-layer clays. Gas chimneys are observed as topographic highs on the regional velocity inversion surface. Beneath the surface are significant fluid-flow compartments, which have a gas-charge in the fluid phase and are isolated from meteoric water recharge. Water-rich domains may occur within regional gas-charged compartments, but are not being recharged from the meteoric water system (i.e., trapped water). The WRB is divided into at least two regionally prominent fluid-flow compartments separated by the velocity inversion surface: a water-dominated upper compartment likely under strong meteoric water drive and a gas-charged, anomalously pressured lower compartment. Judging from cross sections, numerous gas-charged subcompartments occur within the regional compartment. Their geometries and boundaries are controlled by faults and low-permeability rocks. Commercial gas production results when a reservoir interval characterized by enhanced porosity/permeability intersects one of these gas-charged subcompartments. The rock/fluid characteristics of the Rocky Mountain Laramide Basins (RMLB) described in this work determine the potential for significant, relatively unconventional, so-called ''basin-center'' hydrocarbon accumulations. If such accumulations occur, they will be characterized by the following critical attributes: (1) Location beneath a regional velocity inversion surface that typically is associated with low-permeability lithologies; (2) Anomalous pressure, both over- and underpressure, and when, less commonly, they appear to be normally pressured, they are not in contact with the meteoric water system; (3) A significant gas component in the regional multiphase fluid-flow system (water-gas-oil) that occurs beneath the regional velocity inversion surface; (4) Domains of intense gas charge (i.e., high gas saturation) within the regional multiphase fluid-flow system; (5) Compartmentalization of the rock/fluid system to a far greater extent beneath the regional velocity inversion surface than above it (i.e., convection of fluids across the regional velocity inversion surface is reduced or eliminated depending on the nature of the capillary properties of the low-permeability rocks associated with the inversion surface); (6) Commercial gas accumulations occurring at the intersection of reservoir intervals characterized by enhanced porosity and permeability and gas-charged domains; (7) Productive intersections of reservoir intervals and gas-charged domains, which are controlled by the structural, stratigraphic, and diagenetic elements affecting the rock/fluid system; and (8) No apparent meteoric water connection with the gas accumulations and gas columns up to several thousand feet in height. Because some of these critical attributes are not associated with conventional hydrocarbon accumulations, a new set of diagnostic tools are required in order to explore for and exploit these types of gas prospects efficiently and effectively. Some of these new diagnostic tools have been discussed in this report; other have been described elsewhere. In order to maximize risk reduction, it is recommended when exploring for these types of gas accu

Ronald C. Surdam

2003-12-29T23:59:59.000Z

237

Reduce Air Infiltration in Furnaces (English/Chinese) (Fact Sheet)  

SciTech Connect

Chinese translation of the Reduce Air Infiltration in Furnaces fact sheet. Provides suggestions on how to improve furnace energy efficiency. Fuel-fired furnaces discharge combustion products through a stack or a chimney. Hot furnace gases are less dense and more buoyant than ambient air, so they rise, creating a differential pressure between the top and the bottom of the furnace. This differential, known as thermal head, is the source of a natural draft or negative pressure in furnaces and boilers. A well-designed furnace (or boiler) is built to avoid air leakage into the furnace or leakage of flue gases from the furnace to the ambient. However, with time, most furnaces develop cracks or openings around doors, joints, and hearth seals. These openings (leaks) usually appear small compared with the overall dimensions of the furnace, so they are often ignored. The negative pressure created by the natural draft (or use of an induced-draft fan) in a furnace draws cold air through the openings (leaks) and into the furnace. The cold air becomes heated to the furnace exhaust gas temperature and then exits through the flue system, wasting valuable fuel. It might also cause excessive oxidation of metals or other materials in the furnaces. The heat loss due to cold air leakage resulting from the natural draft can be estimated if you know four major parameters: (1) The furnace or flue gas temperature; (2) The vertical distance H between the opening (leak) and the point where the exhaust gases leave the furnace and its flue system (if the leak is along a vertical surface, H will be an average value); (3) The area of the leak, in square inches; and (4) The amount of operating time the furnace spends at negative pressure. Secondary parameters that affect the amount of air leakage include these: (1) The furnace firing rate; (2) The flue gas velocity through the stack or the stack cross-section area; (3) The burner operating conditions (e.g., excess air, combustion air temperature, and so on). For furnaces or boilers using an induced-draft (ID) fan, the furnace negative pressure depends on the fan performance and frictional losses between the fan inlet and the point of air leakage. In most cases, it would be necessary to measure or estimate negative pressure at the opening. The amount of air leakage, the heat lost in flue gases, and their effects on increased furnace or boiler fuel consumption can be calculated by using the equations and graphs given in Industrial Furnaces (see W. Trinks et al., below). Note that the actual heat input required to compensate for the heat loss in flue gases due to air leakage would be greater than the heat contained in the air leakage because of the effect of available heat in the furnace. For a high-temperature furnace that is not maintained properly, the fuel consumption increase due to air leakage can be as high as 10% of the fuel input.

Not Available

2011-10-01T23:59:59.000Z

238

MELCOR Model of the Spent Fuel Pool of Fukushima Dai-ichi Unit 4  

SciTech Connect

Unit 4 of the Fukushima Dai-ichi Nuclear Power Plant suffered a hydrogen explosion at 6:00 am on March 15, 2011, exactly 3.64 days after the earthquake hit the plant and the off-site power was lost. The earthquake occurred on March 11 at 2:47 pm. Since the reactor of this Unit 4 was defueled on November 29, 2010, and all its fuel was stored in the spent fuel pool (SFP4), it was first believed that the explosion was caused by hydrogen generated by the spent fuel, in particular, by the recently discharged core. The hypothetical scenario was: power was lost, cooling to the SFP4 water was lost, pool water heated/boiled, water level decreased, fuel was uncovered, hot Zircaloy reacted with steam, hydrogen was generated and accumulated above the pool, and the explosion occurred. Recent analyses of the radioisotopes present in the water of the SFP4 and underwater video indicated that this scenario did not occur - the fuel in this pool was not damaged and was never uncovered the hydrogen of the explosion was apparently generated in Unit 3 and transported through exhaust ducts that shared the same chimney with Unit 4. This paper will try to answer the following questions: Could that hypothetical scenario in the SFP4 had occurred? Could the spent fuel in the SPF4 generate enough hydrogen to produce the explosion that occurred 3.64 days after the earthquake? Given the magnitude of the explosion, it was estimated that at least 150 kg of hydrogen had to be generated. As part of the investigations of this accident, MELCOR models of the SFP4 were prepared and a series of calculations were completed. The latest version of MELCOR, version 2.1 (Ref. 1), was employed in these calculations. The spent fuel pool option for BWR fuel was selected in MELCOR. The MELCOR model of the SFP4 consists of a total of 1535 fuel assemblies out of which 548 assemblies are from the core defueled on Nov. 29, 2010, 783 assemblies are older assemblies, and 204 are new/fresh assemblies. The total decay heat of the fuel in the pool was, at the time of the accident, 2.284 MWt, of which 1.872 MWt were from the 548 assemblies of the last core discharged and 0.412 MWt were from the older 783 assemblies. These decay heat values were calculated at Oak Ridge National Laboratory using the ORIGEN2.2 code (Ref. 2) - they agree with values reported elsewhere (Ref. 3). The pool dimensions are 9.9 m x 12.2 m x 11.8 m (height), and with the water level at 11.5 m, the pool volume is 1389 m3, of which only 1240 m3 is water, as some volume is taken by the fuel and by the fuel racks. The initial water temperature of the SFP4 was assumed to be 301 K. The fuel racks are made of an aluminum alloy but are modeled in MELCOR with stainless steel and B4C. MELCOR calculations were completed for different initial water levels: 11.5 m (pool almost full, water is only 0.3 m below the top rim), 4.4577 m (top of the racks), 4.2 m, and 4.026 m (top of the active fuel). A calculation was also completed for a rapid loss of water due to a leak at the bottom of the pool, with the fuel rapidly uncovered and oxidized in air. Results of these calculations are shown in the enclosed Table I. The calculation with the initial water level at 11.5 m (full pool) takes 11 days for the water to boil down to the top of the fuel racks, 11.5 days for the fuel to be uncovered, 14.65 days to generate 150 kg of hydrogen and 19 days for the pool to be completely dry. The calculation with the initial water level at 4.4577 m, takes 1.1 days to uncover the fuel and 4.17 days to generate 150 kg of hydrogen. The calculation with the initial water level at 4.02 m takes 3.63 days to generate 150 kg of hydrogen this is exactly the time when the actual explosion occurred in Unit 4. Finally, fuel oxidation in air after the pool drained the water in 20 minutes, generates only 10 kg of hydrogen this is because very little steam is available and Zircaloy (Zr) oxidation with the oxygen of the air does not generate hydrogen. MELCOR calculated water levels and hydrogen generated in the SFP4 as a function of time for initial water le

Carbajo, Juan J [ORNL] [ORNL

2012-01-01T23:59:59.000Z