Powered by Deep Web Technologies
Note: This page contains sample records for the topic "tower solar thermal" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Sandia National Laboratories: Solar Tower  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Thermal Test Facility * NSTTF * Renewable Energy * SAND2012-8086W * solar * Solar Energy * solar power * Solar Research * Solar Tower Comments are closed. Renewable...

2

The Solar Power Tower Jülich — A Solar Thermal Power Plant for Test and Demonstration of Air Receiver Technology  

Science Journals Connector (OSTI)

The open volumetric receiver technology allows the use of air as heat transfer medium at high temperatures in solar thermal power tower plants. It combines porous ceramic ... a strictly modular receiver design. H...

K. Hennecke; P. Schwarzbözl; G. Koll…

2009-01-01T23:59:59.000Z

3

Sandia National Laboratories: Solar Tower  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Power, EC, Energy, National Solar Thermal Test Facility, News, Partnership, Renewable Energy, Solar On June 26 and 27, a series of exposures were made to multiple Boeing test...

4

The solar towers of Chankillo  

E-Print Network [OSTI]

An ancient solar observatory is composed by thirteen towers lined on a hill of a coastal desert of Peru. This is the Chankillo observatory. Here we discuss it, showing some simulations of the local sun direction. An analysis of the behaviour of shadows is also proposed.

Sparavigna, Amelia Carolina

2012-01-01T23:59:59.000Z

5

High-temperature Thermal Storage System for Solar Tower Power Plants with Open-volumetric Air Receiver Simulation and Energy Balancing of a Discretized Model  

Science Journals Connector (OSTI)

Abstract This paper describes the modeling of a high-temperature storage system for an existing solar tower power plant with open volumetric receiver technology, which uses air as heat transfer medium (HTF). The storage system model has been developed in the simulation environment Matlab/Simulink®. The storage type under investigation is a packed bed thermal energy storage system which has the characteristics of a regenerator. Thermal energy can be stored and discharged as required via the HTF air. The air mass flow distribution is controlled by valves, and the mass flow by two blowers. The thermal storage operation strategy has a direct and significant impact on the energetic and economic efficiency of the solar tower power plants.

Valentina Kronhardt; Spiros Alexopoulos; Martin Reißel; Johannes Sattler; Bernhard Hoffschmidt; Matthias Hänel; Till Doerbeck

2014-01-01T23:59:59.000Z

6

Conversion Tower for Dispatchable Solar Power: High-Efficiency Solar-Electric Conversion Power Tower  

SciTech Connect (OSTI)

HEATS Project: Abengoa Solar is developing a high-efficiency solar-electric conversion tower to enable low-cost, fully dispatchable solar energy generation. Abengoa’s conversion tower utilizes new system architecture and a two-phase thermal energy storage media with an efficient supercritical carbon dioxide (CO2) power cycle. The company is using a high-temperature heat-transfer fluid with a phase change in between its hot and cold operating temperature. The fluid serves as a heat storage material and is cheaper and more efficient than conventional heat-storage materials, like molten salt. It also allows the use of a high heat flux solar receiver, advanced high thermal energy density storage, and more efficient power cycles.

None

2012-01-11T23:59:59.000Z

7

Multi-objective optimization of solar tower power plants  

E-Print Network [OSTI]

Multi-objective optimization of solar tower power plants Pascal Richter Center for Computational · Optimization of solar tower power plants 1/20 #12;Introduction ­ Solar tower power plants Solar tower PS10 (11 MW) in Andalusia, Spain · Solar tower with receiver · Heliostat field with self-aligning mirrors

Ábrahám, Erika

8

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

9

Wind, Thermal, and Earthquake Monitoring of the Watts Towers  

E-Print Network [OSTI]

C Solar heating will introduce stresses into the tower’sTower. The LACMA weather station records additional variables such as humidity and solar

English, Jackson

2013-01-01T23:59:59.000Z

10

Multi-objective optimization of solar tower heliostat fields  

E-Print Network [OSTI]

Multi-objective optimization of solar tower heliostat fields Pascal Richter, Martin Frank and Erika Introduction Solar tower plants generate electric power from sunlight by focusing concentrated solar radiation electricity. Fig. 1 Solar tower plant PS10, 11 MW in Andalusia, Spain. [Source: flickr] Solar tower plants

Ábrahám, Erika

11

Project Profile: Solar Power Tower Improvements with the Potential...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

with its baseline solar tower configuration, which is well represented by the System Advisor Model template for a 100-MW solar tower. This mature system-level design is the...

12

Sandia National Laboratories: Solar Tower  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Plan Webinar Wednesday, Jan. 14 Sandian Presents on PV Failure Analysis at European PV Solar Energy Conference and Exhibition (EU PVSC) EC Top Publications Design and Analysis...

13

Optimal Heliostat Layout for Concentrating Solar Tower Systems  

Science Journals Connector (OSTI)

A methodology to give an optimal layout of a group of heliostats has been developed for concentrating solar tower ... the method determines an optimal configuration of a heliostat field around a tower where refle...

Motoaki Utamura; Yutaka Tamaura…

2007-01-01T23:59:59.000Z

14

Numerical analysis of the influence of inclination angle and wind on the heat losses of cavity receivers for solar thermal power towers  

Science Journals Connector (OSTI)

Abstract The convective heat losses of cavity receivers for solar thermal power towers are of great importance for the overall efficiency of the whole system. However, the influence of wind on these losses has not been studied sufficiently for large scale cavity receivers with different inclination angles. In this present study the impact of head-on and side-on wind on large cavity receivers with inclination angles in the range of 0° (horizontal cavity) to 90° (vertical cavity) is analyzed numerically. The simulation results are compared to data published in literature. When no wind is present the losses decrease considerably with increasing inclination angle of the receiver. In case of a horizontal receiver wind does not have a huge impact on the losses: they remain constant on a high level. In case of an inclined cavity wind increases the heat losses significantly in most of the cases, although the highest absolute value of the losses occurs for the horizontal receiver exposed to head on wind. In some cases, when wind is flowing parallel to the aperture plane, a reduction of the heat losses is observed. The temperature distribution in the cavity is analyzed in order to explain the impact of wind on the heat losses. Wind in general causes a shrinking of the zone with uniform high temperature in the upper region of the cavity, whereas wind flowing parallel to the aperture plane additionally inhibits hot air from leaving the cavity and therefore leads to an increased temperature in the lower zone.

Robert Flesch; Hannes Stadler; Ralf Uhlig; Robert Pitz-Paal

2014-01-01T23:59:59.000Z

15

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

16

Solar two: A molten salt power tower demonstration  

SciTech Connect (OSTI)

A consortium of United States utility concerns led by the Southern California Edison Company (SCE) is conducting a cooperative project with the US Department of Energy (DOE), Sandia National Laboratories, and industry to convert the 10-MW Solar One Power Tower Pilot Plant to molten nitrate salt technology. The conversion involves installation of a new receiver, a new thermal storage system, and a new steam generator; it utilizes Solar One`s heliostat field and turbine generator. Successful operation of the converted plant, called Solar Two, will reduce economic risks in building initial commercial power tow projects and accelerate the commercial acceptance of this promising renewable energy technology. The estimated cost of Solar Two, including its three-year test period, is $48.5 million. The plant will begin operation in early 1996.

Tyner, C.E. [Sandia National Labs., Albuquerque, NM (United States); Sutherland, J.P. [Southern California Edison, Rosemead, CA (United States); Gould, W.R. Jr. [Bechtel Corp., San Francisco, CA (United States)

1995-08-01T23:59:59.000Z

17

Concentrating Solar Power Tower System Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Concentrating Solar Power Tower System Basics Concentrating Solar Power Tower System Basics Concentrating Solar Power Tower System Basics August 20, 2013 - 5:06pm Addthis In power tower concentrating solar power systems, numerous large, flat, sun-tracking mirrors, known as heliostats, focus sunlight onto a receiver at the top of a tall tower. A heat-transfer fluid heated in the receiver is used to generate steam, which, in turn, is used in a conventional turbine generator to produce electricity. Some power towers use water/steam as the heat-transfer fluid. Other advanced designs are experimenting with molten nitrate salt because of its superior heat-transfer and energy-storage capabilities. Individual commercial plants can be sized to produce up to 200 megawatts of electricity. Illustration of a power tower power plant. Sunlight is shown reflecting off a series of heliostats surrounding the tower and onto the receiver at the top of the tower. The hot heat-transfer fluid exiting from the receiver flows down the tower, into a feedwater reheater, and then into a turbine, which generates electricity that is fed into the power grid. The cool heat-transfer fluid exiting the turbine flows into a steam condenser to be cooled and sent back up the tower to the receiver.

18

Don Ana Sun Tower Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

Don Ana Sun Tower Solar Power Plant Don Ana Sun Tower Solar Power Plant Jump to: navigation, search Name Don Ana Sun Tower Solar Power Plant Facility Don Ana Sun Tower Sector Solar Facility Type Concentrating Solar Power Developer NRG Energy/eSolar Location Dona Ana County, New Mexico Coordinates 32.485767°, -106.7234639° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.485767,"lon":-106.7234639,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

19

Alpine SunTower Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

SunTower Solar Power Plant SunTower Solar Power Plant Jump to: navigation, search Name Alpine SunTower Solar Power Plant Facility Alpine SunTower Sector Solar Facility Type Concentrating Solar Power Developer NRG Energy/eSolar Location Lancaster, California Coordinates 34.6867846°, -118.1541632° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.6867846,"lon":-118.1541632,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

20

Chapter 10 - Solar Thermal Power Systems  

Science Journals Connector (OSTI)

Abstract Chapter 10 deals with solar thermal power systems. Initially, the general design considerations are given followed by the presentation of the three basic technologies. These include the parabolic trough collector system, which includes a description of the PTC power plant and outlook of the technology; the power tower systems and the dish systems. This is followed by the thermal analysis of the basic cycles of solar thermal power plants. Subsequently, solar updraft tower systems are examined, which include the initial steps and first demonstration, and the thermal analysis. Finally, solar ponds are examined, which is a form of large solar collector and storage system that can be used for solar power generation and include practical design considerations, salty water transmission estimation, methods of heat extraction, description of two large experimental solar ponds, and applications of solar ponds.

Soteris A. Kalogirou

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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

PS10 Solar Power Tower Xi Jing, Fang  

E-Print Network [OSTI]

the solar energy to the grid in 2007 Operating cash flow 1.4 millions in 2007.Operating cash flow 1PS10 Solar Power Tower Xi Jing, Fang #12;Overview Magnitudes , Cost & TechnologiesMagnitudes , Cost Technological ,Social Problems and PolicyTechnological ,Social Problems and Policy ChallengesChallenges #12

Prevedouros, Panos D.

22

Control of the flux distribution on a solar tower receiver using an optimized aiming point strategy: Application to THEMIS solar tower  

Science Journals Connector (OSTI)

Abstract Life time of components is one of the technological bottle-necks in the development of solar tower power plant technology. The receiver, which is subjected to high and variable concentrated solar flux density is particularly affected: High, variable and non-homogeneous solar flux on the solar receiver walls results in strong stresses because of high temperatures, thermal shocks and temperature gradient that contribute to the reduction of the life time of this key component. This work aims to present an open loop approach to control the flux density distribution delivered on a flat plate receiver for a solar power tower. Various distributions of aiming points on the aperture of the receiver are considered. The flux density distribution on the aperture is simulated by a computer code. A specific neighborhood is defined for the TABU optimization meta-heuristic according to the size of the image of each individual heliostat. This modified algorithm is implemented to select the best aiming point for each heliostat. This approach has been validated using the example of THEMIS solar power tower in Targasonne, France.

Adrien Salomé; Fabien Chhel; Gilles Flamant; Alain Ferrière; Frederik Thiery

2013-01-01T23:59:59.000Z

23

On thermal performance of seawater cooling towers  

E-Print Network [OSTI]

Seawater cooling towers have been used since the 1970s in power generation and other industries, so as to reduce the consumption of freshwater. The salts in seawater are known to create a number of operational problems, ...

Sharqawy, Mostafa H.

24

Solar Keymark Testing of Solar Thermal Products  

Science Journals Connector (OSTI)

The Solar Keymark is the official CEN certification scheme for thermal solar collectors and factory made thermal solar systems. The Solar Keymark requires that the products fulfil the...

Harald Drück; Stephan Fischer…

2009-01-01T23:59:59.000Z

25

Strategies in tower solar power plant optimization  

E-Print Network [OSTI]

A method for optimizing a central receiver solar thermal electric power plant is studied. We parametrize the plant design as a function of eleven design variables and reduce the problem of finding optimal designs to the numerical problem of finding the minimum of a function of several variables. This minimization problem is attacked with different algorithms both local and global in nature. We find that all algorithms find the same minimum of the objective function. The performance of each of the algorithms and the resulting designs are studied for two typical cases. We describe a method to evaluate the impact of design variables in the plant performance. This method will tell us what variables are key to the optimal plant design and which ones are less important. This information can be used to further improve the plant design and to accelerate the optimization procedure.

Ramos, A

2012-01-01T23:59:59.000Z

26

SunShot Initiative: Solar Power Tower Improvements with the Potential to  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Power Tower Improvements Solar Power Tower Improvements with the Potential to Reduce Costs to someone by E-mail Share SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Facebook Tweet about SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Twitter Bookmark SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Google Bookmark SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Delicious Rank SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Digg Find More places to share SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on AddThis.com... Concentrating Solar Power

27

Solar Thermal Processes  

Science Journals Connector (OSTI)

The use of solar energy for desalination purposes was one of ... The process is based on the use of solar thermal energy to evaporate water, thus separating pure ... brine. In this chapter an overview of solar thermal

M.T. Chaibi; Ali M. El-Nashar

2009-01-01T23:59:59.000Z

28

Sandia National Laboratories: NASA's Solar Tower Test of the...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

* National Solar Thermal Test Facility * NSTTF * Partnership * Renewable Energy * Solar Energy Comments are closed. Last Updated: September 29, 2014 Go To Top Exceptional...

29

Geometry of tower-type solar electric station heliostat field  

SciTech Connect (OSTI)

A general method is presented for calculating the angular positions of an arbitrary heliostat at an arbitrary position in a heliostat field surrounding a tower-type solar electric station as a function of solar position. A system of angular coordinates is used which rotates with the solar azimuth direction around the collecting tower, resulting in an expression for the proper orientation of heliostat mirrors that is independent of local latitude, solar declination and time of day. The lines on the horizontal plane of the heliostat field characterized by the same values of the angles governing the horizontal inclination of the corresponding heliostat for a given solar elevation form two families of hyperbolas with vertexes facing the center of the field. Such isoline drawings constructed from the calculations may be used to determine the limiting values of the heliostat angles during the daily and seasonal course of operation of the heliostat facility.

Tepliakov, D.I.; Aparisi, R.R.

1980-01-01T23:59:59.000Z

30

The Parameter Optimization and Analysis of a Multi-Stage Tower Type of Solar Desalination Unit  

Science Journals Connector (OSTI)

After the analysis of the multi-stage tower type of solar desalination unit[1], the unit is optimized...

Chen Ziqian; He Kaiyan; Zheng Hongfei…

2009-01-01T23:59:59.000Z

31

Camera-based reflectivity measurement for solar thermal applications  

E-Print Network [OSTI]

Tubular receivers for solar thermal power plants, specifically tower plants, are in common use, in plantsCamera-based reflectivity measurement for solar thermal applications John D. Pye1 , Clifford K. Ho2 of the solar-weighted reflectivity of the receiver component in CSP systems. Such reflectivity measurement

32

Recent AGN Observations by the Solar Tower Atmospheric Cherenkov Effect Experiment  

Science Journals Connector (OSTI)

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a ground?based atmospheric Cherenkov telescope for the detection of very high energy gamma rays from Galactic and extra?galactic sources. By utilizing the large collection area provided by the solar mirrors of the National Solar Thermal Test Facility in Albuquerque New Mexico STACEE achieves a low energy threshold around 100 GeV for the detection of gamma rays. We briefly describe the STACEE detector and detail recent observations of Active Galactic Nuclei.

J. Kildea; A. Alabiso; D. A. Bramel; J. Carson; C. E. Covault; D. Driscoll; P. Fortin; D. M. Gingrich; D. S. Hanna; A. Jarvis; T. Lindner; R. Mukherjee; C. Mueller; R. A. Ong; R. A. Scalzo; D. A. Williams; J. Zweerink

2005-01-01T23:59:59.000Z

33

Unique Solar Thermal Laboratory Gets an Upgrade | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Unique Solar Thermal Laboratory Gets an Upgrade Unique Solar Thermal Laboratory Gets an Upgrade Unique Solar Thermal Laboratory Gets an Upgrade September 10, 2010 - 2:54pm Addthis This “power tower” is part of the National Solar Thermal Test Facility in Albuquerque, which is getting upgrades through Recovery Act funding. | Photo Courtesy of Sandia National Laboratories This "power tower" is part of the National Solar Thermal Test Facility in Albuquerque, which is getting upgrades through Recovery Act funding. | Photo Courtesy of Sandia National Laboratories Lorelei Laird Writer, Energy Empowers The National Solar Thermal Test Facility at Sandia National Laboratories is unique - and in demand. The Facility has been instrumental in NASA tests, national defense programs and concentrated solar technology development.

34

Utility-scale Power Tower Solar Systems: Performance Acceptance Test Guidelines  

Science Journals Connector (OSTI)

Abstract Prior to commercial operation, large solar systems in utility-size power plants need to pass performance acceptance tests conducted by the engineering, procurement, and construction (EPC) contractor or owners. In lieu of the present absence of ASME or other international test codes developed for this purpose, the NREL undertook the development of interim Guidelines to provide recommendations for test procedures that can yield results of a high level of accuracy consistent with good engineering knowledge and practice. The Guidelines contained here follow the general approach of the earlier NREL report on parabolic trough collector fields, but in this case are specifically written for power tower solar systems composed of a heliostat (reflector) field directing the sun's rays to a receiver (heat exchanger) on a high central tower. The working fluid in the tower receiver can be molten salt, water/steam, air, CO2, or other suitable fluids, each with its own particular attributes. The fundamental differences between acceptance of a solar power plant and a conventional fossil-fired plant are the inherently transient nature of the energy source and the necessity to use a performance projection model in the acceptance process. Two primary types of test runs are to be conducted. The first – the Short-Duration Steady-State Thermal Power Test (Power Test) – measures the thermal power output of the solar system under clear-sky conditions over a short period, during which thermal equilibrium and stable steady-state conditions exist, and compares the measured results to performance model projections for those conditions. The second test type – the Long-Duration Production (or Reliability) Test (Production Test)– is a continuous multi-day energy test that gathers multiple detailed daily thermal energy outputs and compares the results to projections from a performance model. Both clear-sky and partly cloudy conditions are acceptable. Additionally, the functionality of the solar system should be observed with regard to such items as daily startup, normal operation, standby and shutdown.

D. Kearney

2014-01-01T23:59:59.000Z

35

Solar thermal aircraft  

DOE Patents [OSTI]

A solar thermal powered aircraft powered by heat energy from the sun. A heat engine, such as a Stirling engine, is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller. The heat engine has a thermal battery in thermal contact with it so that heat is supplied from the thermal battery. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

Bennett, Charles L. (Livermore, CA)

2007-09-18T23:59:59.000Z

36

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

Design. Propofied Solar Cooling Tower Type Wet-Cooled Powerdry-cooling tower was used in the proposed solar power plantTower • Power-Generation Subsystem Summary An Overall Summary of the Proposed Solar

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

37

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

been heated at solar collection tower, at the temperatureIn the receiver tower, the collected solar radiation heatsfocus and send solar radiation to a receiver tower.

Roshandell, Melina

2013-01-01T23:59:59.000Z

38

Sloped-collector solar updraft tower power plant performance  

Science Journals Connector (OSTI)

Abstract A mathematical model describing fluid flow, heat transfer and pressure distribution inside a sloped-collector solar updraft tower power plant (SCSUTPP) is presented by assuming a steady compressible flow. Compared to conventional horizontal-collector solar updraft tower power plants (HCSUTPPs), the performance of SCSUTPP is comprehensively studied based on the mathematical model. The power outputs for SCSUTPP and HCSUTPP using the essential expression of driving force are respectively compared with those using the driving force expressions containing no integral, as proposed in literature. Results show that the expression containing no integral is accurate for HCSUCPP based on a compressible fluid model. The expression containing no integral is not accurate for predicting the driving force of SCSUTPP based on an incompressible fluid model when no variation of the atmospheric density with heights and no variation of difference of the atmospheric density and the density of the current inside the short SUT with heights are assumed. The gravitational effect has to be considered for predicting the SCSUTPP performance. The results show that the pressure potential and the power production of an SCSUCPP with a collector of 848 m height and a vertical SUT 123 m high lies between those for two \\{HCSUCPPs\\} respectively with vertical \\{SUTs\\} 547 m and 971 m high. This work lays a good foundation for accurate predication of potential power produced from SCSUTPP.

Xinping Zhou; Shuo Yuan; Marco Aurélio dos Santos Bernardes

2013-01-01T23:59:59.000Z

39

Performance of molten salt solar power towers in Chile  

Science Journals Connector (OSTI)

Chile is facing important challenges to develop its energy sector. Estimations demonstrate that in its electricity consumption Chile will grow at an annual rate of 4.6% until 2030 despite ongoing efficiency improvements. To satisfy this demand in a sustainable way the national energy policy promotes the integration of novel and clean power generation into the national power mix with special emphasis on concentrated solar power (CSP). The present paper assesses the development of solar-based electricity generation in Chile by CSP achieved by a Solar Power Tower plant (SPT) using molten salt as heat carrier and store. Such SPTs can be installed at different locations in Chile and connected to the main national grid. Results show that each SPT plant can generate around 76 GWh el of net electricity when considering solar irradiation as the sole energy source and at a 16% overall efficiency of the SPT process. For operation in a continuous mode a hybrid configuration with integrated gas backup system increases the generating potential of each SPT to 135 GWh el . A preliminary Levelized Energy Cost (LEC) calculation provides LEC values between 0.15 and 0.18 $/kWh as function of the overall process efficiency and estimated investment cost. Chile's solar irradiation favors the implementation of SPT plants.

G. Cáceres; N. Anrique; A. Girard; J. Degrève; J. Baeyens; H. L. Zhang

2013-01-01T23:59:59.000Z

40

Thermal effects testing at the National Solar Thermal Test Facility  

SciTech Connect (OSTI)

The National Solar Thermal Test Facility is operated by Sandia National Laboratories and located on Kirkland Air Force Base in Albuquerque, New Mexico. The permanent features of the facility include a heliostat field and associated receiver tower, two solar furnaces, two point-focus parabolic concentrators, and Engine Test Facility. The heliostat field contains 220 computer-controlled mirrors, which reflect concentrated solar energy to test stations on a 61-m tower. The field produces a peak flux density of 250 W/cm{sup 2} that is uniform over a 15-cm diameter with a total beam power of over 5 MW{sub t}. The solar beam has been used to simulate aerodynamic heating for several customers. Thermal nuclear blasts have also been simulated using a high-speed shutter in combination with heliostat control. The shutter can accommodate samples up to 1 m {times} 1 m and it has been used by several US and Canadian agencies. A glass-windowed wind tunnel is also available in the Solar Tower. It provides simultaneous exposure to the thermal flux and air flow. Each solar furnace at the facility includes a heliostat, an attenuator, and a parabolic concentrator. One solar furnace produces flux levels of 270 W/cm{sup 2} over and delivers a 6-mm diameter and total power of 16 kW{sub t}. A second furnace produces flux levels up to 1000 W/cm{sup 2} over a 4 cm diameter and total power of 60 kW{sub t}. Both furnaces include shutters and attenuators that can provide square or shaped pulses. The two 11 m diameter tracking parabolic point-focusing concentrators at the facility can each produce peak flux levels of 1500 W/cm{sup 2} over a 2.5 cm diameter and total power of 75 kW{sub t}. High-speed shutters have been used to produce square pulses.

Ralph, M.E.; Cameron, C.P. [Sandia National Labs., Albuquerque, NM (United States); Ghanbari, C.M. [Technadyne Engineering Consultants, Inc., Albuquerque, NM (United States)

1992-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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

Thermal effects testing at the National Solar Thermal Test Facility  

SciTech Connect (OSTI)

The National Solar Thermal Test Facility is operated by Sandia National Laboratories and located on Kirkland Air Force Base in Albuquerque, New Mexico. The permanent features of the facility include a heliostat field and associated receiver tower, two solar furnaces, two point-focus parabolic concentrators, and Engine Test Facility. The heliostat field contains 220 computer-controlled mirrors, which reflect concentrated solar energy to test stations on a 61-m tower. The field produces a peak flux density of 250 W/cm[sup 2] that is uniform over a 15-cm diameter with a total beam power of over 5 MW[sub t]. The solar beam has been used to simulate aerodynamic heating for several customers. Thermal nuclear blasts have also been simulated using a high-speed shutter in combination with heliostat control. The shutter can accommodate samples up to 1 m [times] 1 m and it has been used by several US and Canadian agencies. A glass-windowed wind tunnel is also available in the Solar Tower. It provides simultaneous exposure to the thermal flux and air flow. Each solar furnace at the facility includes a heliostat, an attenuator, and a parabolic concentrator. One solar furnace produces flux levels of 270 W/cm[sup 2] over and delivers a 6-mm diameter and total power of 16 kW[sub t]. A second furnace produces flux levels up to 1000 W/cm[sup 2] over a 4 cm diameter and total power of 60 kW[sub t]. Both furnaces include shutters and attenuators that can provide square or shaped pulses. The two 11 m diameter tracking parabolic point-focusing concentrators at the facility can each produce peak flux levels of 1500 W/cm[sup 2] over a 2.5 cm diameter and total power of 75 kW[sub t]. High-speed shutters have been used to produce square pulses.

Ralph, M.E.; Cameron, C.P. (Sandia National Labs., Albuquerque, NM (United States)); Ghanbari, C.M. (Technadyne Engineering Consultants, Inc., Albuquerque, NM (United States))

1992-01-01T23:59:59.000Z

42

Scattering Solar Thermal Concentrators  

Broader source: Energy.gov [DOE]

"This fact sheet describes a scattering solar thermal concentrators project awarded under the DOE's 2012 SunShot Concentrating Solar Power R&D award program. The team, led by the Pennsylvania State University, is working to demonstrate a new, scattering-based approach to concentrating sunlight that aims to improve the overall performance and reliability of the collector field. The research team aims to show that scattering solar thermal collectors are capable of achieving optical performance equal to state-of-the-art parabolic trough systems, but with the added benefits of immunity to wind-load tracking error, more efficient land use, and utilization of stationary receivers."

43

Passive Solar Building Design and Solar Thermal Space Heating...  

Broader source: Energy.gov (indexed) [DOE]

Passive Solar Building Design and Solar Thermal Space Heating Webinar Passive Solar Building Design and Solar Thermal Space Heating Webinar Watch a recording of National Renewable...

44

Concentrating Solar Power Tower System Basics | Department of...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

which, in turn, is used in a conventional turbine generator to produce electricity. Some power towers use watersteam as the heat-transfer fluid. Other advanced designs are...

45

Thermal Storage of Solar Energy  

Science Journals Connector (OSTI)

Thermal storage is needed to improve the efficiency and usefulness of solar thermal systems. The paper indicates the main storage ... which would greatly increase the practical use of solar energy — is more diffi...

H. Tabor

1984-01-01T23:59:59.000Z

46

Thermal Solar Power Plants Experience  

Science Journals Connector (OSTI)

In parallel with rising interest in solar power generation, several solar thermal facilities of different configuration and size were ... were designed as modest-size experimental or prototype solar power plants ...

W. Grasse; H. P. Hertlein; C.-J. Winter; G. W. Braun

1991-01-01T23:59:59.000Z

47

Thermal performance upgrade of the Arkansas Nuclear One cooling tower: A ``root cause`` analysis approach  

SciTech Connect (OSTI)

The thermal performance efficiency of the natural draft cooling tower at Entergy Operations` 858 MWe Arkansas Nuclear One, Unit 2 was successfully upgraded to 101% of design performance capability in April 1994 as the end result of a unique root-cause analysis of the cooling tower`s long-standing performance deficiencies. Through application of state-of-the-art diagnostic testing methods and computer modeling techniques, Entergy was able to identify and correct air/water maldistribution problems in the 447 foot tall counterflow cooling tower at minimal cost. Entergy estimates that the savings realized, as a result of the 1.2 F reduction in cooling tower outlet water temperature, will pay for the thermal upgrade project in approximately 14 months.

Liffick, G.W. [Entergy Operations, Inc., Russellville, AR (United States); Cooper, J.W. Jr. [John Cooper and Associates, Tampa, FL (United States)

1995-10-01T23:59:59.000Z

48

Sandia National Laboratories: Concentrating Solar Power  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

NASA's Solar Tower Test of the 1-Meter Aeroshell On August 23, 2012, in Concentrating Solar Power, Energy, Facilities, National Solar Thermal Test Facility, News, Partnership,...

49

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

50

Gaskell Sun Tower and 2 others Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

Gaskell Sun Tower and 2 others Solar Power Plant Gaskell Sun Tower and 2 others Solar Power Plant Jump to: navigation, search Name Gaskell Sun Tower and 2 others Solar Power Plant Facility Gaskell Sun Tower and 2 others Sector Solar Facility Type Concentrating Solar Power Facility Status Proposed Developer NRG Energy/eSolar Location Kern County, California Coordinates 35.4937274°, -118.8596804° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.4937274,"lon":-118.8596804,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

51

Status of Solar Thermal Conversion in China  

Science Journals Connector (OSTI)

China has an abundant solar energy resource. Solar thermal conversion systems have been studied for more than 25 years and solar thermal industry has been developing since 1990’s....2 solar collectors were sold a...

Yin Zhiqiang

2009-01-01T23:59:59.000Z

52

Solar Thermal Process Heat | Open Energy Information  

Open Energy Info (EERE)

Solar Thermal Process Heat Incentives Retrieved from "http:en.openei.orgwindex.php?titleSolarThermalProcessHeat&oldid267198" Category: Articles with outstanding TODO tasks...

53

Laser Texturing for Solar Thermal Systems  

Science Journals Connector (OSTI)

High solar absorptance and low thermal emittance is desired for absorber surface in solar thermal systems. Molybdenum surface was textured by pulsed fiber laser and...

Shah, Ankit; Gupta, Mool

54

CALIFORNIA SOLAR INITIATIVE-THERMAL PROGRAMHANDBOOK  

E-Print Network [OSTI]

CALIFORNIA SOLAR INITIATIVE-THERMAL PROGRAMHANDBOOK CALIFORNIA PUBLIC UTILITIES California Solar Initiative Thermal Program Handbook i 1. Introduction to CSI-Thermal Program ..........................................................................3 2.1 Participants in the CSI-Thermal Program

55

solar thermal | OpenEI  

Open Energy Info (EERE)

thermal thermal Dataset Summary Description This dataset presents summary information related to world solar energy. It is part of a supporting dataset for the book World On the Edge: How to Prevent Environmental and Economic Collapse by Lester R. Source Earth Policy Institute Date Released January 12th, 2011 (3 years ago) Date Updated Unknown Keywords EU solar solar PV solar thermal world Data application/vnd.ms-excel icon Excel spreadsheet, summary solar energy data on multiple tabs (xls, 145.9 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Open Data Commons Attribution License Comment "Reuse of our data is permitted. We merely ask that wherever it is listed, it be appropriately cited"

56

Development of the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE)  

E-Print Network [OSTI]

STACEE is a proposed atmospheric Cherenkov telescope for ground-based gamma-ray astrophysics between 25 and 500 GeV. The telescope will make use of the large solar mirrors (heliostats) available at a solar research facility to achieve an energy threshold lower than any existing ground-based instrument. This paper describes the development of STACEE, including an overview of the complete instrument design and a discussion of results from recent prototype tests at the large solar heliostat field of Sandia National Laboratories.

Ong, R A

1998-01-01T23:59:59.000Z

57

Development of the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE)  

E-Print Network [OSTI]

STACEE is a proposed atmospheric Cherenkov telescope for ground-based gamma-ray astrophysics between 25 and 500 GeV. The telescope will make use of the large solar mirrors (heliostats) available at a solar research facility to achieve an energy threshold lower than any existing ground-based instrument. This paper describes the development of STACEE, including an overview of the complete instrument design and a discussion of results from recent prototype tests at the large solar heliostat field of Sandia National Laboratories.

Rene A. Ong; the STACEE Collaboration

1997-01-30T23:59:59.000Z

58

Impact of Ageing on Thermal Efficiency of Solar Thermal Collectors  

Science Journals Connector (OSTI)

Today it is common practice to calculate the performance of solar thermal systems or solar collectors based on the results of a thermal performance test carried out with a new solar collector. However, for an int...

Elke Streicher; Stephan Fischer…

2009-01-01T23:59:59.000Z

59

Scattering Solar Thermal Concentrators  

Broader source: Energy.gov (indexed) [DOE]

is a rendering of a scattering solar concentrator. Light collected by a cylindrical Fresnel lens is focused within a curved glass "guide" sheet, where it is redirected into...

60

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

ENERGY STORAGE FOR CONCENTRATING SOLAR POWER PLANTS,”Thermal Energy Storage in Concentrated Solar Thermal PowerThermal Energy Storage in Concentrated Solar Thermal Power

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

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


61

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

CHANGE THERMAL ENERGY STORAGE FOR CONCENTRATING SOLAR POWERfor Thermal Energy Storage in Concentrated Solar Thermalfor Thermal Energy Storage in Concentrated Solar Thermal

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

62

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

and Background Solar thermal energy collection is anCHANGE THERMAL ENERGY STORAGE FOR CONCENTRATING SOLAR POWERfor Thermal Energy Storage in Concentrated Solar Thermal

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

63

Sandia National Laboratories: solar thermal storage  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sandia Workers Received Entrepreneurial Spirit Awards On April 3, 2013, in Concentrating Solar Power, Energy, Facilities, National Solar Thermal Test Facility, News, News &...

64

Sandia National Laboratories: solar thermal energy storage  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

thermal energy storage Sandia Solar Energy Test System Cited in National Engineering Competition On May 16, 2013, in Concentrating Solar Power, Energy, Energy Storage, Facilities,...

65

NREL: Climate Neutral Research Campuses - Solar Thermal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

cooling system in 2006. Back to Top Technology Basics The following resources explain the fundamentals of solar thermal technologies: NREL Solar Energy Basics: Descriptive overview...

66

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT Thomas F.CENTRAL RECEIVER SOLAR THERMAL POWER SYSTEM, PHASE progressCorporation, RECEIVER SOLAR THERMAL POWER SYSTEM, PHASE I,

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

67

Solar Thermal Energy Storage  

Science Journals Connector (OSTI)

Various types of thermal energy storage systems are introduced and their importance and desired characteristics are outlined. Sensible heat storage, which is one of the most commonly used storage systems in pract...

E. Paykoç; S. Kakaç

1987-01-01T23:59:59.000Z

68

High-Temperature Thermal Array for Next Generation Solar Thermal...  

Broader source: Energy.gov (indexed) [DOE]

Thermal Array for Next Generation Solar Thermal Power Production Award Number: DE-EE00025828 Report Date: March 15, 2013 PI: Stephen Obrey * Technical approach is focused on...

69

Practical Solar Thermal Chilled Water  

E-Print Network [OSTI]

the potential to impact America's use of non-renewable energy beyond its own design capacity by applying it to the optimization of an existing building's system. Solar-thermal chilling systems are not new. However, few of them can be described as a practical...

Leavell, B.

2010-01-01T23:59:59.000Z

70

Solar Thermal Reactor Materials Characterization  

SciTech Connect (OSTI)

Current research into hydrogen production through high temperature metal oxide water splitting cycles has created a need for robust high temperature materials. Such cycles are further enhanced by the use of concentrated solar energy as a power source. However, samples subjected to concentrated solar radiation exhibited lifetimes much shorter than expected. Characterization of the power and flux distributions representative of the High Flux Solar Furnace(HFSF) at the National Renewable Energy Laboratory(NREL) were compared to ray trace modeling of the facility. In addition, samples of candidate reactor materials were thermally cycled at the HFSF and tensile failure testing was performed to quantify material degradation. Thermal cycling tests have been completed on super alloy Haynes 214 samples and results indicate that maximum temperature plays a significant role in reduction of strength. The number of cycles was too small to establish long term failure trends for this material due to the high ductility of the material.

Lichty, P. R.; Scott, A. M.; Perkins, C. M.; Bingham, C.; Weimer, A. W.

2008-03-01T23:59:59.000Z

71

Collector Field Maintenance: Distributed Solar Thermal Systems  

Science Journals Connector (OSTI)

This paper reports on recent operation and maintenance experiences with distributed solar thermal systems. Although some information on system-...

E. C. Boes; E. C. Cameron; E. L. Harley

1986-01-01T23:59:59.000Z

72

Thermoelectrics Combined with Solar Concentration for Electrical and Thermal Cogeneration  

E-Print Network [OSTI]

significant challenge for solar thermal energy generation issolar thermal, cogeneration of electrical and thermal energy,for efficient energy production. Solar thermal plants, such

Jackson, Philip Robert

2012-01-01T23:59:59.000Z

73

Prototype Test Results of the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE)  

E-Print Network [OSTI]

There are currently no experiments, either satellite or ground-based, that are sensitive to astrophysical gamma-rays at energies between 20 and 250 GeV. We are developing the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) to explore this energy range. STACEE will use heliostat mirrors at a solar research facility to collect Cherenkov light from extensive air showers produced by high energy gamma-rays. Here we report on the results of prototype test work at the solar facility of Sandia National Laboratories (Albuquerque, NM). The work demonstrates that the facility is suitable for use as an astrophysical observatory. In addition, using a full scale prototype of part of STACEE, we detected atmospheric Cherenkov radiation at energies lower than any other ground-based experiment to date.

STACEE Collaboration

1997-04-03T23:59:59.000Z

74

California Solar Initiative - Solar Thermal Program | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

California Solar Initiative - Solar Thermal Program California Solar Initiative - Solar Thermal Program California Solar Initiative - Solar Thermal Program < Back Eligibility Commercial Fed. Government Industrial Local Government Low-Income Residential Multi-Family Residential Nonprofit Residential Schools State Government Savings Category Heating & Cooling Solar Swimming Pool Heaters Water Heating Maximum Rebate Step 1 Incentive Limits (contact utility to determine current incentive limits): Single-family residential systems that displace natural gas: $2,719 Single-family residential systems that displace electricity or propane: $1,834 Commercial and multifamily residential systems that displace natural gas: $500,000 Commercial and multifamily residential systems that displace electricity or propane: $250,000

75

An integrated solar thermal power system using intercooled gas turbine and Kalina cycle  

Science Journals Connector (OSTI)

A new solar tower thermal power system integrating the intercooled gas turbine top cycle and the Kalina bottoming cycle is proposed in the present paper. The thermodynamic performance of the proposed system is investigated, and the irreversibility of energy conversion is disclosed using the energy–utilization diagram method. On the top cycle of the proposed system, the compressed air after being intercooled is heated at 1000 °C or higher at the solar tower receiver and is used to drive the gas turbine to generate power. The ammonia–water mixture as the working substance of the bottom cycle recovers the waste heat from the gas turbine to generate power. A concise analytical formula of solar-to-electric efficiency of the proposed system is developed. As a result, the peak solar-to-electric efficiency of the proposed system is 27.5% at a gas turbine inlet temperature of 1000 °C under the designed solar direct normal irradiance of 800 W/m2. Compared with a conventional solar power tower plant, the proposed integrated system conserves approximately 69% of consumed water. The results obtained in the current study provide an approach to improve solar-to-electric efficiency and offer a potential to conserve water for solar thermal power plants in arid area.

Shuo Peng; Hui Hong; Hongguang Jin; Zhifeng Wang

2012-01-01T23:59:59.000Z

76

Utility-Scale Power Tower Solar Systems: Performance Acceptance Test Guidelines  

SciTech Connect (OSTI)

The purpose of these Guidelines is to provide direction for conducting performance acceptance testing for large power tower solar systems that can yield results of a high level of accuracy consistent with good engineering knowledge and practice. The recommendations have been developed under a National Renewable Energy Laboratory (NREL) subcontract and reviewed by stakeholders representing concerned organizations and interests throughout the concentrating solar power (CSP) community. An earlier NREL report provided similar guidelines for parabolic trough systems. These Guidelines recommend certain methods, instrumentation, equipment operating requirements, and calculation methods. When tests are run in accordance with these Guidelines, we expect that the test results will yield a valid indication of the actual performance of the tested equipment. But these are only recommendations--to be carefully considered by the contractual parties involved in the Acceptance Tests--and we expect that modifications may be required to fit the particular characteristics of a specific project.

Kearney, D.

2013-03-01T23:59:59.000Z

77

Thermoelectrics Combined with Solar Concentration for Electrical and Thermal Cogeneration  

E-Print Network [OSTI]

13 2.2.2. Solar Thermal Versus Photovoltaic ..…………..…………doi:10.1038/nmat2090. 17. Solar Thermal Technology on anFigure 2.5: An eSolar solar thermal system in Burbank,

Jackson, Philip Robert

2012-01-01T23:59:59.000Z

78

Solar energy thermalization and storage device  

DOE Patents [OSTI]

A passive solar thermalization and thermal energy storage assembly which is visually transparent. The assembly consists of two substantial parallel, transparent wall members mounted in a rectangular support frame to form a liquid-tight chamber. A semitransparent thermalization plate is located in the chamber, substantially paralled to and about equidistant from the transparent wall members to thermalize solar radiation which is stored in a transparent thermal energy storage liquid which fills the chamber. A number of the devices, as modules, can be stacked together to construct a visually transparent, thermal storage wall for passive solar-heated buildings.

McClelland, John F. (Ames, IA)

1981-09-01T23:59:59.000Z

79

Bionics in textiles: flexible and translucent thermal insulations for solar thermal applications  

Science Journals Connector (OSTI)

...translucent thermal insulations for solar thermal applications Thomas Stegmaier...Denkendorf73770 Denkendorf, Germany Solar thermal collectors used at present consist...transparent thermal insulation|solar thermal collector| 1. Introduction...

2009-01-01T23:59:59.000Z

80

The Status of Solar Thermal Electric Technology  

Science Journals Connector (OSTI)

Solar thermal electric technology was evaluated as a future source of power for United States utilities. The technology status was developed using an ... configuration was selected for each of the major solar col...

Richard J. Holl; Edgar A. DeMeo

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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

Solar Thermal Incentive Program | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Solar Thermal Incentive Program Solar Thermal Incentive Program Solar Thermal Incentive Program < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate 50% of the project cost Program Info Funding Source Public Benefits Fund State Connecticut Program Type State Rebate Program Rebate Amount Calculated: $70 multiplied by the SRCC "C" rating multiplied by the number of collectors multiplied by the Shading Factor Provider Clean Energy Finance and Investment Authority Note: This program is not currently accepting applications. Check the program web site for information regarding future financing programs. To participate in the residential solar hot water rebate, homeowners must first complete an energy assessment. Then, they must work with CEFIA

82

A solar concentrating photovoltaic/thermal collector .  

E-Print Network [OSTI]

??This thesis discusses aspects of a novel solar concentrating photovoltaic / thermal (PV/T) collector that has been designed to produce both electricity and hot water.… (more)

Coventry, Joseph S

2008-01-01T23:59:59.000Z

83

High-Temperature Thermal Array for Next Generation Solar Thermal...  

Broader source: Energy.gov (indexed) [DOE]

3 Q1 High-Temperature Thermal Array for Next Generation Solar Thermal Power Production - FY13 Q1 This document summarizes the progress of this Los Alamos National Laboratory...

84

SunShot Initiative: Brayton Cycle Baseload Power Tower  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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

85

Geometric Modularity in the Thermal Modeling of Solar Steam Turbines  

Science Journals Connector (OSTI)

Abstract To optimize the start-up schedules of steam turbines operating in concentrating solar power plants, accurate predictions of the temperatures within the turbine are required. In previous work by the authors, thermal models of steam turbines have been developed and validated for parabolic trough solar power plant applications. Building on these results, there is an interest to increase the adaptability of the models with respect to different turbine geometries due to the growing trend of having larger steam turbines in parabolic trough and solar tower power plants. In this work, a modular geometric approach has been developed and compared against both the previous modeling approach and 96 h of measured data from an operational parabolic trough power plant. Results show a large degree of agreement with respect to the measured data in spite of the different detail levels. The new model allows for simple and fast prediction of the thermal behavior of different steam turbine sizes and geometries, which is expected to be of significant importance for future concentrating solar power plants.

M. Topel; J. Spelling; M. Jöcker; B. Laumert

2014-01-01T23:59:59.000Z

86

Pv-Thermal Solar Power Assembly  

DOE Patents [OSTI]

A flexible solar power assembly includes a flexible photovoltaic device attached to a flexible thermal solar collector. The solar power assembly can be rolled up for transport and then unrolled for installation on a surface, such as the roof or side wall of a building or other structure, by use of adhesive and/or other types of fasteners.

Ansley, Jeffrey H. (El Cerrito, CA); Botkin, Jonathan D. (El Cerrito, CA); Dinwoodie, Thomas L. (Piedmont, CA)

2001-10-02T23:59:59.000Z

87

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

Cecil. E. A. , Research on Dry-Type Cooling _T_o_w_e_r~s~f~oTower Type Wet-Cooled Power Plant Solar-Power Plant Dry-Cool

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

88

Thermal Management of Solar Cells  

E-Print Network [OSTI]

a better thermal conductance and when ceramic particles areor ceramic fillers that enhances thermal conductivity. Solid

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

89

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

for concentrating solar-thermal energy use a large number ofBoth solar power plants absorb thermal energy in high-of a solar power plant that converts thermal energy into

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

90

A NEW SOLAR THERMAL RECEIVER UTILIZING SMALL PARTICLES  

E-Print Network [OSTI]

iuision, Ext. 6782 A New Solar Thermal Receiver UtilizingI \\D \\. }J F--' A NEW SOLAR THERMAL RECEIVER UTILIZING SMALL94720 ABSTRACT A new type of solar thermal receiver is being

Hunt, Arlon J.

2011-01-01T23:59:59.000Z

91

Project Profile: National Solar Thermal Test Facility  

Broader source: Energy.gov [DOE]

The first solar receivers ever tested in the world were tested at the National Solar Thermal Test Facility (NSTTF). The receivers were each rated up to 5 megawatts thermal (MWt). Receivers with various working fluids have been tested here over the years, including air, water-steam, molten salt, liquid sodium, and solid particles. The NSTTF has also been used for a large variety of other tests, including materials tests, simulation of thermal nuclear pulses and aerodynamic heating, and ablator testing for NASA.

92

Sandia National Laboratories: Sandia-AREVA Commission Solar Thermal...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ClimateECResearch & CapabilitiesCapabilitiesSandia-AREVA Commission Solar ThermalMolten Salt Energy-Storage Demonstration Sandia-AREVA Commission Solar ThermalMolten Salt...

93

Preliminary Investigation into Solar Thermal Combi-system Performance.  

E-Print Network [OSTI]

??Solar thermal combi-systems use solar energy to provide thermal energy for space heating and domestic hot water. These systems come in many different designs and… (more)

Lee, Elizabeth

2014-01-01T23:59:59.000Z

94

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Power Technical Management Position On July 12, 2012, in Concentrating Solar Power, Energy, Facilities, Job Listing, National Solar Thermal Test Facility, News,...

95

Preliminary requirements for thermal storage subsystems in solar thermal applications  

SciTech Connect (OSTI)

Methodologies for the analysis of value and comparing thermal storage concepts are presented. Value is a measure of worth and is determined by the cost of conventional fuel systems. Value data for thermal storage in large solar thermal electric power applications are presented. Thermal storage concepts must be compared when all are performing the same mission. A method for doing that analysis, called the ranking index, is derived. Necessary data to use the methodology are included.

Copeland, R.J.

1980-04-01T23:59:59.000Z

96

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

for Storage of Solar Thermal Energy,” Solar Energy, 18 (3),Toward Molecular Solar-Thermal Energy Storage,” Angewandtescale molecular solar thermal energy storage system, in

Coso, Dusan

2013-01-01T23:59:59.000Z

97

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

S. a. , 2004, “Solar Thermal Collectors and Applications,”86] Schnatbaum L. , 2009, “Solar Thermal Power Plants,” Thefor Storage of Solar Thermal Energy,” Solar Energy, 18 (3),

Coso, Dusan

2013-01-01T23:59:59.000Z

98

EIS-0416: Ivanpah Solar Electric Generating System in San Bernardino...  

Broader source: Energy.gov (indexed) [DOE]

Generating System (07-AFC-5) Project, Proposal to Construct a 400-m Megawatt Concentrated Solar Power Tower, Thermal-Electric Power Plant, San Bernardino County, California July 1,...

99

A new method for the design of the heliostat field layout for solar tower power plant  

Science Journals Connector (OSTI)

A new method for the design of the heliostat field layout for solar tower power plant is proposed. In the new method, the heliostat boundary is constrained by the receiver geometrical aperture and the efficiency factor which is the product of the annual cosine efficiency and the annual atmospheric transmission efficiency of heliostat. With the new method, the annual interception efficiency does not need to be calculated when places the heliostats, therefore the total time of design and optimization is saved significantly. Based on the new method, a new code for heliostat field layout design (HFLD) has been developed and a new heliostat field layout for the PS10 plant at the PS10 location has been designed by using the new code. Compared with current PS10 layout, the new designed heliostats have the same optical efficiency but with a faster response speed. In addition, to evaluate the feasibility of crops growth on the field land under heliostats, a new calculation method for the annual sunshine duration on the land surface is proposed as well.

Xiudong Wei; Zhenwu Lu; Zhifeng Wang; Weixing Yu; Hongxing Zhang; Zhihao Yao

2010-01-01T23:59:59.000Z

100

Cost and performance analysis of concentrating solar power systems with integrated latent thermal energy storage  

Science Journals Connector (OSTI)

Abstract Integrating TES (thermal energy storage) in a CSP (concentrating solar power) plant allows for continuous operation even during times when solar irradiation is not available, thus providing a reliable output to the grid. In the present study, the cost and performance models of an EPCM-TES (encapsulated phase change material thermal energy storage) system and HP-TES (latent thermal storage system with embedded heat pipes) are integrated with a CSP power tower system model utilizing Rankine and s-CO2 (supercritical carbon-dioxide) power conversion cycles, to investigate the dynamic TES-integrated plant performance. The influence of design parameters of the storage system on the performance of a 200 MWe capacity power tower CSP plant is studied to establish design envelopes that satisfy the U.S. Department of Energy SunShot Initiative requirements, which include a round-trip annualized exergetic efficiency greater than 95%, storage cost less than $15/kWht and LCE (levelized cost of electricity) less than 6 ¢/kWh. From the design windows, optimum designs of the storage system based on minimum LCE, maximum exergetic efficiency, and maximum capacity factor are reported and compared with the results of two-tank molten salt storage system. Overall, the study presents the first effort to construct and analyze LTES (latent thermal energy storage) integrated CSP plant performance that can help assess the impact, cost and performance of LTES systems on power generation from molten salt power tower CSP plant.

K. Nithyanandam; R. Pitchumani

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

COST REDUCTION STUDY FOR SOLAR THERMAL POWER PLANTS, Ottawa,Storage in Concentrated Solar Thermal Power Plants A ThesisStorage in Concentrated Solar Thermal Power Plants by Corey

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

102

Low-cost distributed solar-thermal-electric power generation  

E-Print Network [OSTI]

Low-cost distributed solar-thermal-electric power generation A. Der Minassians, K. H. Aschenbach and feasibility study of a low-cost solar thermal electricity generation technology, suitable for distributed: Solar Thermal Collectors, Solar Thermal Electricity, Stirling Engine 1. INTRODUCTION In this paper, we

Sanders, Seth

103

Thermal Insulation in Solar Thermal Devices  

Science Journals Connector (OSTI)

Thermal Insulation is a device or a practice which is used in a system for minimising heat losses caused due to transfer of heat from hotter to colder regions. It is one of the cheapest methods of energy conse...

B. C. Raychaudhuri

1986-01-01T23:59:59.000Z

104

Project Profile: Low-Cost Solar Thermal Collector | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Solar Thermal Collector Project Profile: Low-Cost Solar Thermal Collector SunTrough Energy logo SunTrough, under the Baseload CSP FOA, is developing a new class of solar...

105

Optical and Thermal Characterization of High Reflective Surface with Applications in Thermal-Solar Technology  

Science Journals Connector (OSTI)

Selective solar absorbing coating consists of a high thermal reflectance layer and high solar absorbance layer deposited over a substrate. In this work optical and thermal properties...

Macias, Juan Daniel; Ramirez Rincon, Jorge Andres; Lizama Tzec, Francisco Ivan; Ares Muzio, Oscar Eduardo; Oskam, Gerko; De Coss Gomez, Romeo; Alvarado Gil, Juan José

106

Optical and Thermal Characterization of High Reflection Surfaces with Applcations in Thermal-Solar Technology  

Science Journals Connector (OSTI)

Selective solar absorbing coating consists of a high thermal reflectance layer and a high solar absorbance layer deposited over a substrate. In this work optical and thermal properties...

Macias, Juan Daniel; Ramirez Rincon, Jorge Andres; Lizama Tzec, Francisco Ivan; Ares Muzio, Oscar Eduardo; Oskam, Gerko; De Coss Gomez, Romeo; Alvarado Gil, Juan José

107

Solar thermal propulsion status and future  

SciTech Connect (OSTI)

The status of solar absorber/thruster research is reviewed, and potential future applications and advanced solar thermal propulsion concepts are discussed. Emphasis is placed on two concepts, the windowless heat exchanger cavity and the porous material absorption concepts. Mission studies demonstrate greater than 50 percent increase in payload compared to chemical propulsion for a LEO-to-GEO mission. Alternative missions that have been considered for this concept include the Thousand Astronomical Unit mission, LEO-to-lunar orbit, and other SEI missions. It is pointed out that solar thermal propulsion is inherently simple and capable of moderate-to-high engine performance at moderate-to-low thrust levels. 15 refs.

Shoji, J.M.; Frye, P.E.; Mcclanahan, J.A. (Rockwell International Corp., Rocketdyne Div., Canoga Park, CA (United States))

1992-03-01T23:59:59.000Z

108

Thermal metastabilities in the solar core  

E-Print Network [OSTI]

Linear stability analysis indicates that solar core is thermally stable for infinitesimal internal perturbations. For the first time, thermal metastabilities are found in the solar core when outer perturbations with significant amplitude are present. The obtained results show that hot bubbles generated by outer perturbations may travel a significant distance in the body of the Sun. These deep-origin hot bubbles have mass, energy, and chemical composition that may be related to solar flares. The results obtained may have remarkable relations to activity cycles in planets like Jupiter and also in extrasolar planetary systems.

Attila Grandpierre; Gabor Agoston

2002-01-18T23:59:59.000Z

109

Thermal Management of Solar Cells  

E-Print Network [OSTI]

D. Mills, "Cooling of photovoltaic cells under concentratedelectric performance of a photovoltaic cells by cooling andSolar Cell A photovoltaic cell is a semiconductor that

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

110

Sandia National Laboratories: solar thermal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Plan Webinar Wednesday, Jan. 14 Sandian Presents on PV Failure Analysis at European PV Solar Energy Conference and Exhibition (EU PVSC) EC Top Publications Design and Analysis...

111

Thermal Management of Solar Cells.  

E-Print Network [OSTI]

??The focus on solar cells as a source of photovoltaic energy is rapidly increasing nowadays. The amount of sun's energy entering earth surface in one… (more)

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

112

Life Cycle Greenhouse Gas Emissions of Trough and Tower Concentrating Solar Power Electricity Generation: Systematic Review and Harmonization  

SciTech Connect (OSTI)

In reviewing life cycle assessment (LCA) literature of utility-scale concentrating solar power (CSP) systems, this analysis focuses on reducing variability and clarifying the central tendency of published estimates of life cycle greenhouse gas (GHG) emissions through a meta-analytical process called harmonization. From 125 references reviewed, 10 produced 36 independent GHG emissions estimates passing screens for quality and relevance: 19 for parabolic trough (trough) technology and 17 for power tower (tower) technology. The interquartile range (IQR) of published estimates for troughs and towers were 83 and 20 grams of carbon dioxide equivalent per kilowatt-hour (g CO2-eq/kWh),1 respectively; median estimates were 26 and 38 g CO2-eq/kWh for trough and tower, respectively. Two levels of harmonization were applied. Light harmonization reduced variability in published estimates by using consistent values for key parameters pertaining to plant design and performance. The IQR and median were reduced by 87% and 17%, respectively, for troughs. For towers, the IQR and median decreased by 33% and 38%, respectively. Next, five trough LCAs reporting detailed life cycle inventories were identified. The variability and central tendency of their estimates are reduced by 91% and 81%, respectively, after light harmonization. By harmonizing these five estimates to consistent values for global warming intensities of materials and expanding system boundaries to consistently include electricity and auxiliary natural gas combustion, variability is reduced by an additional 32% while central tendency increases by 8%. These harmonized values provide useful starting points for policy makers in evaluating life cycle GHG emissions from CSP projects without the requirement to conduct a full LCA for each new project.

Burkhardt, J. J.; Heath, G.; Cohen, E.

2012-04-01T23:59:59.000Z

113

Utilizing Solar Thermal Energy in Textile Processing Units  

Science Journals Connector (OSTI)

This chapter presents the prospects of solar thermal energy utilization in the textile processing units in Pakistan. Various solar thermal technologies suitable for thermal energy production and their application...

Asad Mahmood; Khanji Harijan

2012-01-01T23:59:59.000Z

114

List of Solar Thermal Process Heat Incentives | Open Energy Information  

Open Energy Info (EERE)

Process Heat Incentives Process Heat Incentives Jump to: navigation, search The following contains the list of 204 Solar Thermal Process Heat Incentives. CSV (rows 1 - 204) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active 30% Business Tax Credit for Solar (Vermont) Corporate Tax Credit Vermont Commercial Industrial Photovoltaics Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Water Heat No APS - Renewable Energy Incentive Program (Arizona) Utility Rebate Program Arizona Commercial Residential Anaerobic Digestion Biomass Daylighting Geothermal Electric Ground Source Heat Pumps Landfill Gas Other Distributed Generation Technologies Photovoltaics Small Hydroelectric Solar Pool Heating Solar Space Heat Solar Thermal Process Heat

115

OpenEI - solar thermal  

Open Energy Info (EERE)

Summary World Solar Summary World Solar Energy Data (from World on the Edge) http://en.openei.org/datasets/node/460 This dataset presents summary information related to world solar energy. It is part of a supporting dataset for the book World On the Edge: How to Prevent Environmental and Economic Collapse by Lester R.

License
116

Solar Thermal Incentive Program | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Thermal Incentive Program Thermal Incentive Program Solar Thermal Incentive Program < Back Eligibility Agricultural Commercial Fed. Government Industrial Institutional Local Government Multi-Family Residential Nonprofit Residential Schools State Government Savings Category Heating & Cooling Solar Water Heating Maximum Rebate Residential: $4,000 per site/meter Non-residential: $25,000 per site/meter Incentive also capped at 80% of calculated existing thermal load Program Info Funding Source RPS surcharge Start Date 12/10/2010 Expiration Date 12/31/2015 State New York Program Type State Rebate Program Rebate Amount $1.50 per kWh displaced annually, for displacement of up to 80% of calculated existing thermal load Provider New York State Energy Research and Development Authority The New York State Energy Research and Development Authority (NYSERDA)

117

SunShot Initiative: Low-Cost Solar Thermal Collector  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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

118

SunShot Initiative: Scattering Solar Thermal Concentrators  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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

119

WATTS TOWERS: THE EFFECTS OF THERMAL CYCLES ON THE FORMATION AND BEHAVIOR OF CRACKS  

E-Print Network [OSTI]

to make lasting repairs to the Watts Towers. 15 REFERENCES [1] LSTC. "LS-DYNA KEYWROD MANUAL." DYNA Support. Livermore Software Technology Corporation, n.d. Web. 5 Apr. 2013.

Spencer, Matthew T

2013-02-06T23:59:59.000Z

120

Solar thermal electric power information user study  

SciTech Connect (OSTI)

The results of a series of telephone interviews with groups of users of information on solar thermal electric power are described. These results, part of a larger study on many different solar technologies, identify types of information each group needed and the best ways to get information to each group. The report is 1 of 10 discussing study results. The overall study provides baseline data about information needs in the solar community. An earlier study identified the information user groups in the solar community and the priority (to accelerate solar energy commercialization) of getting information to each group. In the current study only high-priority groups were examined. Results from five solar thermal electric power groups of respondents are analyzed: DOE-Funded Researchers, Non-DOE-Funded Researchers, Representatives of Utilities, Electric Power Engineers, and Educators. The data will be used as input to the determination of information products and services the Solar Energy Research Institute, the Solar Energy Information Data Bank Network, and the entire information outreach community should be preparing and disseminating.

Belew, W.W.; Wood, B.L.; Marle, T.L.; Reinhardt, C.L.

1981-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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

Solar Thermal/PV | OpenEI  

Open Energy Info (EERE)

Thermal/PV Thermal/PV Dataset Summary Description Provides annual consumption (in quadrillion Btu) of renewable energy by energy use sector (residential, commercial, industrial, transportation and electricity) and by energy source (e.g. solar, biofuel) for 2004 through 2008. Original sources for data are cited on spreadsheet. Also available from: www.eia.gov/cneaf/solar.renewables/page/trends/table1_2.xls Source EIA Date Released August 01st, 2010 (4 years ago) Date Updated Unknown Keywords annual energy consumption biodiesel Biofuels biomass energy use by sector ethanol geothermal Hydroelectric Conventional Landfill Gas MSW Biogenic Other Biomass renewable energy Solar Thermal/PV Waste wind Wood and Derived Fuels Data application/vnd.ms-excel icon RE Consumption by Energy Use Sector, Excel file (xls, 32.8 KiB)

122

23.11.2014bo Akademi Univ -Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/36 7. Air conditioning, cooling towers  

E-Print Network [OSTI]

23.11.2014Ã?bo Akademi Univ - Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/36 7. Air conditioning, cooling towers Ron Zevenhoven Ã?bo Akademi University Thermal and Flow Engineering Laboratory Engineering Piispankatu 8, 20500 Turku 2/36 7.1 Humid air #12;23.11.2014 Ã?bo Akademi Univ - Thermal and Flow

Zevenhoven, Ron

123

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Center in Vermont Achieves Milestone Installation On September 23, 2014, in Concentrating Solar Power, Energy, Facilities, National Solar Thermal Test Facility, News, News &...

124

Thermoelectrics Combined with Solar Concentration for Electrical and Thermal Cogeneration  

E-Print Network [OSTI]

for efficient energy production. Solar thermal plants, suchenergy production. It would require a substantial amount of land usage to install enough solar

Jackson, Philip Robert

2012-01-01T23:59:59.000Z

125

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Visit to NSTTF On September 10, 2012, in Concentrating Solar Power, EC, National Solar Thermal Test Facility, Renewable Energy Dr. David Danielson visited Sandia National...

126

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Test Facility Air Force Research Laboratory Testing On August 17, 2012, in Concentrating Solar Power, Energy, Facilities, National Solar Thermal Test Facility, News, Renewable...

127

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sandia Wins Three R&D100 Awards On July 24, 2013, in Concentrating Solar Power, Energy, Facilities, National Solar Thermal Test Facility, News, News & Events, Photovoltaic,...

128

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Funding Award On June 4, 2014, in Advanced Materials Laboratory, Concentrating Solar Power, Energy, Energy Storage, Facilities, National Solar Thermal Test Facility,...

129

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Better Sandia Capabilities to Support Power Industry On January 8, 2013, in Concentrating Solar Power, Energy, Energy Storage, Facilities, National Solar Thermal Test Facility,...

130

Optics and Photonics in Solar Thermal Energy Technologies  

Science Journals Connector (OSTI)

The complex optical diagnostics employed in the development and application of solar thermal and wind energy technologies are reviewed, with application in particle receivers, solar...

Nathan, G J 'Gus'; Alwahabi, Zeyad; Dally, Bassam B; Medwell, Paul R; Arjomandi, Maziar; Sun, Zhiwei; Lau, Timothy C; van Eyk, Philip

131

City of Dubuque - Solar Thermal Licensing Requirement | Department of  

Broader source: Energy.gov (indexed) [DOE]

City of Dubuque - Solar Thermal Licensing Requirement City of Dubuque - Solar Thermal Licensing Requirement City of Dubuque - Solar Thermal Licensing Requirement < Back Eligibility Construction Installer/Contractor Savings Category Heating & Cooling Solar Water Heating Program Info State Iowa Program Type Solar/Wind Contractor Licensing Provider City of Dubuque The City of Dubuque requires a Solar Thermal License in order for a person to install a solar thermal project on a home or business. The requirement does not apply to solar photovoltaics. The licensing requirement can be met one of two ways. An installer may be Solar Thermal Certified by the North American Board of Certified Energy Practitioners (NABCEP) or An installer may complete the Northeast Iowa Community College Solar Thermal Training Installers are also required to obtain a permit before altering or

132

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...

133

TOWER-TRACKING HELIOSTAT ARRAY.  

E-Print Network [OSTI]

?? This thesis presents a method of tracking and correcting for the swaying of a central receiver tower in concentrated solar production plants.  The method… (more)

Masters, Joel T

2011-01-01T23:59:59.000Z

134

Thermal and non-thermal energies in solar flares  

E-Print Network [OSTI]

The energy of the thermal flare plasma and the kinetic energy of the non-thermal electrons in 14 hard X-ray peaks from 9 medium-sized solar flares have been determined from RHESSI observations. The emissions have been carefully separated in the spectrum. The turnover or cutoff in the low-energy distribution of electrons has been studied by simulation and fitting, yielding a reliable lower limit to the non-thermal energy. It remains the largest contribution to the error budget. Other effects, such as albedo, non-uniform target ionization, hot target, and cross-sections on the spectrum have been studied. The errors of the thermal energy are about equally as large. They are due to the estimate of the flare volume, the assumption of the filling factor, and energy losses. Within a flare, the non-thermal/thermal ratio increases with accumulation time, as expected from loss of thermal energy due to radiative cooling or heat conduction. Our analysis suggests that the thermal and non-thermal energies are of the same magnitude. This surprising result may be interpreted by an efficient conversion of non-thermal energy to hot flare plasma.

Pascal Saint-Hilaire; Arnold O. Benz

2005-03-03T23:59:59.000Z

135

Integration of solar thermal energy into processes with heat demand  

Science Journals Connector (OSTI)

An integration of solar thermal energy can reduce the utility cost and the environmental impact. A proper integration of solar thermal energy is required in order to achieve ... objective of this study is to maxi...

Andreja Nemet; Zdravko Kravanja…

2012-06-01T23:59:59.000Z

136

Tuning energy transport in solar thermal systems using nanostructured materials  

E-Print Network [OSTI]

Solar thermal energy conversion can harness the entire solar spectrum and theoretically achieve very high efficiencies while interfacing with thermal storage or back-up systems for dispatchable power generation. Nanostructured ...

Lenert, Andrej

2014-01-01T23:59:59.000Z

137

List of Solar Thermal Electric Incentives | Open Energy Information  

Open Energy Info (EERE)

Electric Incentives Electric Incentives Jump to: navigation, search The following contains the list of 548 Solar Thermal Electric Incentives. CSV (rows 1-500) CSV (rows 501-548) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active 30% Business Tax Credit for Solar (Vermont) Corporate Tax Credit Vermont Commercial Industrial Photovoltaics Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Water Heat No APS - Net Metering (Arizona) Net Metering Arizona Commercial Industrial Residential Nonprofit Schools Local Government State Government Fed. Government Agricultural Institutional Solar Thermal Electric Photovoltaics Wind energy Biomass No Advanced Energy Fund (Ohio) Public Benefits Fund Ohio Commercial Industrial Institutional

138

Solar wind electron temperature and density measurements on the Solar Orbiter with thermal noise spectroscopy  

E-Print Network [OSTI]

Solar wind electron temperature and density measurements on the Solar Orbiter with thermal noise of the plasma thermal noise analysis for the Solar Orbiter, in order to get accurate measurements of the total of their small mass and therefore large thermal speed, the solar wind electrons are expected to play a major role

California at Berkeley, University of

139

10 MWe Solar Thermal Central Receiver Pilot Plant — Heliostat Evaluation  

Science Journals Connector (OSTI)

Sandia is responsible for evaluating the heliostats at the 10 MWe Solar Thermal Central Receiver Pilot Plant in Barstow, California...

C. L. Mavis; J. J. Bartel

1986-01-01T23:59:59.000Z

140

Thermal and non-thermal energies in solar flares  

E-Print Network [OSTI]

The energy of the thermal flare plasma and the kinetic energy of the non-thermal electrons in 14 hard X-ray peaks from 9 medium-sized solar flares have been determined from RHESSI observations. The emissions have been carefully separated in the spectrum. The turnover or cutoff in the low-energy distribution of electrons has been studied by simulation and fitting, yielding a reliable lower limit to the non-thermal energy. It remains the largest contribution to the error budget. Other effects, such as albedo, non-uniform target ionization, hot target, and cross-sections on the spectrum have been studied. The errors of the thermal energy are about equally as large. They are due to the estimate of the flare volume, the assumption of the filling factor, and energy losses. Within a flare, the non-thermal/thermal ratio increases with accumulation time, as expected from loss of thermal energy due to radiative cooling or heat conduction. Our analysis suggests that the thermal and non-thermal energies are of the same m...

Saint-Hilaire, P; Saint-Hilaire, Pascal; Benz, Arnold O.

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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.


141

Flexible thermal cycle test equipment for concentrator solar cells  

DOE Patents [OSTI]

A system and method for performing thermal stress testing of photovoltaic solar cells is presented. The system and method allows rapid testing of photovoltaic solar cells under controllable thermal conditions. The system and method presents a means of rapidly applying thermal stresses to one or more photovoltaic solar cells in a consistent and repeatable manner.

Hebert, Peter H. (Glendale, CA); Brandt, Randolph J. (Palmdale, CA)

2012-06-19T23:59:59.000Z

142

SUBMITTED TO GRL 1 Thermal Anisotropies in the Solar Wind  

E-Print Network [OSTI]

SUBMITTED TO GRL 1 E Thermal Anisotropies in the Solar Wind: vidence of Heating by Interstellar cyclotron instabilit s generated by newly created pickup ions and heats the thermal solar wind protons TO GRL 2 T Introduction he thermal anisotropy of the solar wind is the ratio between the temperatures p

Richardson, John

143

A solar concentrating photovoltaic / thermal collector J.S. Coventry  

E-Print Network [OSTI]

A solar concentrating photovoltaic / thermal collector J.S. Coventry Centre for Sustainable Energy solar concentrating photovoltaic / thermal collector Coventry "Photovoltaic and Wind Power for Urban of both photovoltaic and solar thermal power generation. Some of the recent projects in Australia

144

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ECISEnergyRenewable EnergySolar EnergyConcentrating Solar Power ECISEnergyRenewable EnergySolar EnergyConcentrating Solar Power (CSP)National Solar Thermal Test Facility National Solar Thermal Test Facility NSTTF Interactive Tour National Solar Thermal Test Facility (NSTTF) Operated by Sandia National Laboratories for the U.S. Department of Energy (DOE), the National Solar Thermal Test Facility (NSTTF) is the only test facility of this type in the United States. The NSTTF's primary goal is to provide experimental engineering data for the design, construction, and operation of unique components and systems in proposed solar thermal electrical plants planned for large-scale power generation. In addition, the site was built and instrumented to provide test facilities for a variety of solar and nonsolar applications. The facility can provide

145

Project Profile: High-Temperature Solar Selective Coating Development for Power Tower Receivers  

Broader source: Energy.gov [DOE]

Sandia National Laboratories (SNL), under the National Laboratory R&D competitive funding opportunity, is developing, characterizing, and refining advanced solar-selective coatings with high solar-weighted absorptivity (a > 0.95) and low emittance (e

146

Conceptional Design of Solar Power Plant with Central Receiver Tower Based on Improved Heliostats  

Science Journals Connector (OSTI)

For technical and economical evaluations of solar power plant, the comparisons from technical points and electricity cost are presented on the solar plant with the heliostats based on new material and configurati...

H. Yoshikawa; N. Ikeda

1985-01-01T23:59:59.000Z

147

Small solar (thermal) water-pumping system  

SciTech Connect (OSTI)

A small solar (thermal) water pump phototype was tested. The pump works on an organic Rankine cycle using refrigerant R113. The design of the pump is described. Detailed temperature and pressure measurements of the working fluid for different operating conditions are performed. The behaviour of the cycle is analysed to get a clear picture of the thermodynamic process. Power-characteristic curves are obtained by a systematic variation of water temperature, pumping head and heat input. 10 refs., 13 figs., 2 tabs.

Spindler, K.; Hahne, E. [Universitaet Stuttgart (Germany)] [Universitaet Stuttgart (Germany); Chandwalker, K. [Stiletto Engineers, Hyderabad (India)] [Stiletto Engineers, Hyderabad (India)

1996-07-01T23:59:59.000Z

148

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants.  

E-Print Network [OSTI]

??Experimental studies are presented that aim to utilize phase change materials (PCM's) to enhance thermal energy storage systems for concentrated solar thermal power (CSP) systems.… (more)

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

149

Optimal heliostat aiming strategy for uniform distribution of heat flux on the receiver of a solar power tower plant  

Science Journals Connector (OSTI)

Abstract Temperature distribution on the receiver surface of a solar power tower plant is of great importance. High temperature gradients may lead to local hot spots and consequently failure of the receiver. The temperature distribution can be controlled by defining several aiming points on the receiver surface and adjusting the heliostats accordingly. In this paper, a new optimization algorithm which works based on the principles of genetic algorithm is developed to find the optimal flux distribution on the receiver surface. The objective is to minimize the standard deviation of the flux density distribution by changing the aiming points of individual heliostats. Flux distribution of each heliostat is found by using the HFLCAL model [1], which is validated against experimental data. The results show that after employing the new algorithm the maximum flux density is reduced by an order of magnitude. The effects of number of aiming points and size of the aiming surface on the flux density distribution are investigated in detail.

Saeb M. Besarati; D. Yogi Goswami; Elias K. Stefanakos

2014-01-01T23:59:59.000Z

150

Observations of the Pulsar PSR B1951+32 with the Solar Tower Atmospheric Cherenkov Effect Experiment  

E-Print Network [OSTI]

We present the analysis and results of 12.5 hours of high-energy gamma-ray observations of the EGRET-detected pulsar PSR B1951+32 using the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE). STACEE is an atmospheric Cherenkov detector, in Albuquerque, New Mexico, that detects cosmic gamma rays using the shower-front-sampling technique. STACEE's sensitivity to astrophysical sources at energies around 100 GeV allows it to investigate emission from gamma-ray pulsars with expected pulsed emission cutoffs below 100 GeV. We discuss the observations and analysis of STACEE's PSR 1951+32 data, accumulated during the 2005 and 2006 observing seasons.

J. Kildea; J. Zweerink; J. Ball; J. E. Carson; C. E. Covault; D. D. Driscoll; P. Fortin; D. M. Gingrich; D. S. Hanna; A. Jarvis; T. Lindner; C. Mueller; R. Mukherjee; R. A. Ong; K. Ragan; D. A. Williams

2007-10-25T23:59:59.000Z

151

Observations of the Pulsar PSR B1951+32 with the Solar Tower Atmospheric Cherenkov Effect Experiment  

E-Print Network [OSTI]

We present the analysis and results of 12.5 hours of high-energy gamma-ray observations of the EGRET-detected pulsar PSR B1951+32 using the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE). STACEE is an atmospheric Cherenkov detector, in Albuquerque, New Mexico, that detects cosmic gamma rays using the shower-front-sampling technique. STACEE's sensitivity to astrophysical sources at energies around 100 GeV allows it to investigate emission from gamma-ray pulsars with expected pulsed emission cutoffs below 100 GeV. We discuss the observations and analysis of STACEE's PSR 1951+32 data, accumulated during the 2005 and 2006 observing seasons.

Kildea, J; Ball, J; Carson, J E; Covault, C E; Driscoll, D D; Fortin, P; Gingrich, D M; Hanna, D S; Jarvis, A; Lindner, T; Müller, C; Mukherjee, R; Ong, R A; Ragan, K; Williams, D A

2007-01-01T23:59:59.000Z

152

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

Solar thermal energy collection is an exciting technology for the replacement of non-renewable energy production.

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

153

Gulf Power - Solar Thermal Water Heating Program | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Gulf Power - Solar Thermal Water Heating Program Gulf Power - Solar Thermal Water Heating Program Gulf Power - Solar Thermal Water Heating Program < Back Eligibility Low-Income Residential Multi-Family Residential Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate $1,000 Program Info State Florida Program Type Utility Rebate Program Provider Energy Efficiency '''''This program reopened on October 3, 2011 for 2012 applications. Funding is limited and must be reserved through online application before the installation of qualifying solar water heating systems. See Gulf Power's [http://www.gulfpower.com/renewable/solarThermal.asp Solar Water Heating] web site for more information.''''' Gulf Power offers a Solar Thermal Water Heating rebate to customers who install water heaters. This program started after the original pilot

154

Multi-tower line focus Fresnel array project  

SciTech Connect (OSTI)

As an alternative to conventional tracking solar thermal trough systems, one may use line focus Fresnel reflector systems. In a conventional Fresnel reflector design, each field of reflectors is directed to a single tower. However efficient systems of very high ground utilisation can be setup if a field of reflectors uses multiple receivers on different towers. This paper describes a line focus system, called the compact linear fresnel reflector system and a project to produce an initial 95 MWth solar array. The array will be used as a retrofit preheater for a coal fired generating plant.

Mills, D.R.; Morrison, G.; Pye, J.; Le Lievre, P. [Solar Heat & Power SHP Pty. Ltd., Sydney, NSW (Australia)

2006-02-15T23:59:59.000Z

155

Sorption thermal storage for solar energy  

Science Journals Connector (OSTI)

Abstract Sorption technologies, which are considered mainly for solar cooling and heat pumping before, have gained a lot of interests for heat storage of solar energy in recent years, due to their high energy densities and long-term preservation ability for thermal energy. The aim of this review is to provide an insight into the basic knowledge and the current state of the art of research on sorption thermal storage technologies. The first section is concerned with the terminology and classification for sorption processes to give a clear scope of discussion in this paper. Sorption thermal storage is suggested to cover four technologies: liquid absorption, solid adsorption, chemical reaction and composite materials. Then the storage mechanisms and descriptions of basic closed and open cycles are given. The progress of sorption materials, cycles, and systems are also reviewed. Besides the well-known sorbents like silica gels and zeolites, some new materials, including aluminophosphates (AlPOs), silico-aluminophosphates (SAPOs) and metal-organic frameworks (MOFs), are proposed for heat storage. As energy density is a key criterion, emphais is given to the comparison of storage densities and charging tempertures for different materials. Ongoing research and development studies show that the challenges of the technology focus on the aspects of different types of sorption materials, the configurations of absorption cycles and advanced adsorption reactors. Booming progress illustrates that sorption thermal storage is a realistic and sustainable option for storing solar energy, especially for long-term applications. To bring the sorption storage solution into market, more intensive studies in fields of evaluation of advanced materials and development of efficient and compact prototypes are still required.

N. Yu; R.Z. Wang; L.W. Wang

2013-01-01T23:59:59.000Z

156

Review Article Solar-Thermal Powered Desalination: Its Significant  

E-Print Network [OSTI]

1 Review Article Solar-Thermal Powered Desalination: Its Significant Challenges and Potential John@kau.edu.sa Abstract Solar-desalination systems are desalination systems that are powered by solar energy. With the goal of identifying the key technical challenges and potential opportunities solar-desalination, we

Reif, John H.

157

Augmentation of thermal power stations with solar energy  

Science Journals Connector (OSTI)

A new concept of integration of a solar concentrator field with a modern thermal power station is proposed. Such a configuration ... and infrastructure as a base load facility and solar energy to reduce the fuel ...

BR Pai

1991-06-01T23:59:59.000Z

158

High Energy Gamma-Ray Observations of the Crab Nebula and Pulsar with the Solar Tower Atmospheric Cherenkov Effect Experiment  

E-Print Network [OSTI]

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a new ground-based atmospheric Cherenkov telescope for gamma-ray astronomy. STACEE uses the large mirror area of a solar heliostat facility to achieve a low energy threshold. A prototype experiment which uses 32 heliostat mirrors with a total mirror area of ~ 1200\\unit{m^2} has been constructed. This prototype, called STACEE-32, was used to search for high energy gamma-ray emission from the Crab Nebula and Pulsar. Observations taken between November 1998 and February 1999 yield a strong statistical excess of gamma-like events from the Crab, with a significance of $+6.75\\sigma$ in 43 hours of on-source observing time. No evidence for pulsed emission from the Crab Pulsar was found, and the upper limit on the pulsed fraction of the observed excess was E_{th}) = (2.2 \\pm 0.6 \\pm 0.2) \\times 10^{-10}\\unit{photons cm^{-2} s^{-1}}. The observed flux is in agreement with a continuation to lower energies of the power law spectrum seen at TeV energies.

STACEE Collaboration; S. Oser; D. Bhattacharya; L. M. Boone; M. C. Chantell; Z. Conner; C. E. Covault; M. Dragovan; P. Fortin; D. T. Gregorich; D. S. Hanna; R. Mukherjee; R. A. Ong; K. Ragan; R. A. Scalzo; D. R. Schuette; C. G. Theoret; T. O. Tumer; D. A. Williams; J. A. Zweerink

2000-06-21T23:59:59.000Z

159

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

160

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water. 6 figs.

Prueitt, M.L.

1996-01-16T23:59:59.000Z

162

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode.

Prueitt, Melvin L. (Los Alamos, NM)

1994-01-01T23:59:59.000Z

163

Thermal model of solar absorption HVAC systems  

SciTech Connect (OSTI)

This paper presents a thermal model that describes the performance of solar absorption HVAC systems. The model considers the collector array, the building cooling and heating loads, the absorption chiller and the high temperature storage. Heat losses from the storage tank and piping are included in the model. All of the results presented in the paper are for an array of flat plate solar collectors with black chrome (selective surface) absorber plates. The collector efficiency equation is used to calculate the useful heat output from the array. The storage is modeled as a non-stratified tank with polyurethane foam insulation. The system is assumed to operate continuously providing air conditioning during the cooling season, space heating during the winter and hot water throughout the year. The amount of heat required to drive the chiller is determined from the coefficient of performance of the absorption cycle. Results are presented for a typical COP of 0.7. The cooling capacity of the chiller is a function of storage (generator) temperature. The nominal value is 190 F (88 C) and the range of values considered is 180 F (82 C) to 210 F (99 C). Typical building cooling and heating loads are determined as a function of ambient conditions. Performance results are presented for Sacramento, CA and Washington, D.C. The model described in the paper makes use of National Solar Radiation Data Base (NSRDB) data and results are presented for these two locations. The uncertainties in the NSRDB are estimated to be in a range of 6% to 9%. This is a significant improvement over previously available data. The model makes it possible to predict the performance of solar HVAC systems and calculate quantities such as solar fraction, storage temperature, heat losses and parasitic power for every hour of the period for which data are available.

Bergquam, J.B.; Brezner, J.M. [California State Univ., Sacramento, CA (United States). Dept. of Mechanical Engineering; [Bergquam Energy Systems, Sacramento, CA (United States)

1995-11-01T23:59:59.000Z

164

Energy Balance and Thermal Comfort in Passive Solar Housing  

Science Journals Connector (OSTI)

To evaluate the performance of different passive solar dwellings it is necessary to consider not only the thermal performance but also the “comfort performance” of the system.

K. Alder; Ch. Eriksson; A. Faist; N. Morel

1984-01-01T23:59:59.000Z

165

Parabolic Trough Solar Thermal Electric Power Plants (Fact Sheet)  

SciTech Connect (OSTI)

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

Not Available

2006-07-01T23:59:59.000Z

166

Thermoelectrics Combined with Solar Concentration for Electrical and Thermal Cogeneration.  

E-Print Network [OSTI]

??A solar tracker and concentrator was designed and assembled for the purpose of cogeneration of thermal power and electrical power using thermoelectric technology. A BiTe… (more)

Jackson, Philip Robert

2012-01-01T23:59:59.000Z

167

Colored solar-thermal absorbing coatings with high absorptance  

Science Journals Connector (OSTI)

It's difficult to obtain different color appearance and keep high absorptance simultaneously. We introduced AR films into solar-thermal absorbing coatings to tune the color appearance...

Wang, Shao-Wei; Chen, Feiliang; Liu, Xingxing; Wang, Xiaofang; Yu, Liming; Lu, Wei

168

Solar Thermal Energy Storage Device: Hybrid Nanostructures for High-Energy-Density Solar Thermal Fuels  

SciTech Connect (OSTI)

HEATS Project: MIT is developing a thermal energy storage device that captures energy from the sun; this energy can be stored and released at a later time when it is needed most. Within the device, the absorption of sunlight causes the solar thermal fuel’s photoactive molecules to change shape, which allows energy to be stored within their chemical bonds. A trigger is applied to release the stored energy as heat, where it can be converted into electricity or used directly as heat. The molecules would then revert to their original shape, and can be recharged using sunlight to begin the process anew. MIT’s technology would be 100% renewable, rechargeable like a battery, and emissions-free. Devices using these solar thermal fuels—called Hybrisol—can also be used without a grid infrastructure for applications such as de-icing, heating, cooking, and water purification.

None

2012-01-09T23:59:59.000Z

169

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with Combined Heat and Power  

E-Print Network [OSTI]

thermal absorption solar photo- storage chiller thermalbetween solar thermal collection and storage systems and CHPimpact of solar thermal and heat storage on CO 2 emissions

Marnay, Chris

2010-01-01T23:59:59.000Z

170

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with Combined Heat and Power  

E-Print Network [OSTI]

Environmental Value of Solar Thermal Systems in MicrogridsEnvironmental Value of Solar Thermal Systems in Microgridsa) ABSTRACT The addition of solar thermal and heat storage

Marnay, Chris

2010-01-01T23:59:59.000Z

171

Solar wind electron density and temperature over solar cycle 23: Thermal noise measurements on Wind  

E-Print Network [OSTI]

Solar wind electron density and temperature over solar cycle 23: Thermal noise measurements on Wind; received in revised form 6 April 2005; accepted 25 April 2005 Abstract We present the solar wind plasma parameters obtained from the Wind spacecraft during more than nine years, encompassing almost the whole solar

California at Berkeley, University of

172

Energy management in solar thermal power plants with double thermal storage system and subdivided solar field  

Science Journals Connector (OSTI)

In the paper, two systems for solar thermal power plants (STPPs) are devised for improving the overall performance of the plant. Each one attempts to reduce losses coming from two respective sources. The systems are simulated and compared to a reference STPP. They consists on: (a) a double thermal energy storage (DTS) with different functionalities for each storage and (b) the subdivision of the solar collector field (SSF) into specialised sectors, so that each sector is designed to meet a thermal requirement, usually through an intermediate heat exchanger. This subdivision reduces the losses in the solar field by means of a decrease of the temperature of the heat transfer fluid (HTF). Double thermal energy storage is intended for keeping the plant working at nominal level for many hours a day, including post-sunset hours. One of the storages gathers a fluid which is heated up to temperatures above the nominal one. In order to make it work, the solar field must be able to overheat the fluid at peak hours. The second storage is the classical one. The combination of both allows the manager of the plant to keep the nominal of the plant for longer periods than in the case of classical thermal energy storage. To the authors’ knowledge, it is the first time that both configurations are presented and simulated for the case of parabolic through STPP with HTF technology. The results show that, if compared to the reference STPP, both configurations may raise the annual electricity generation (up to 1.7% for the DTS case and 3.9% for the SSF case).

Antonio Rovira; María José Montes; Manuel Valdes; José María Martínez-Val

2011-01-01T23:59:59.000Z

173

Thermal behaviour of new crystalline semitransparent solar cell structure  

Science Journals Connector (OSTI)

This paper presents the structure of a novel semitransparent solar cell and its thermal behaviour, which cell can be used for building integrated applications. The crystalline self-made test cells can be manufactured using basic semiconductor technological ... Keywords: Building integrated photovoltaics, Semitransparent solar cell and thermal characteristics

Enik Bándy; Márta Rencz,

2013-11-01T23:59:59.000Z

174

Spectrally Solar Selective Coatings for Colored Flat Plate Solar Thermal Collectors  

Science Journals Connector (OSTI)

The paper is a review on the state-of-the-art on colored materials (absorbers and glazings) for solar thermal flat plate collectors obtained world-wide. The ... input for novel, market-acceptable flat plate solar

Luminita Isac; Alexandru Enesca…

2014-01-01T23:59:59.000Z

175

Receiver subsystem analysis report (RADL Item 4-1). 10-MWe Solar Thermal Central-Receiver Pilot Plant: solar-facilities design integration  

SciTech Connect (OSTI)

The results are presented of those thermal hydraulic, structural, and stress analyses required to demonstrate that the Receiver design for the Barstow Solar Pilot Plant will satisfy the general design and performance requirements during the plant's design life. Recommendations resulting from those analyses and supporting test programs are presented regarding operation of the receiver. The analyses are limited to receiver subsystem major structural parts (primary tower, receiver unit core support structure), pressure parts (absorber panels, feedwater, condensate and steam piping/components, flash tank, and steam mainfold) and shielding. (LEW)

Not Available

1982-04-01T23:59:59.000Z

176

Rankline-Brayton engine powered solar thermal aircraft  

DOE Patents [OSTI]

A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight. The Rankine-Brayton engine has a thermal battery, preferably containing a lithium-hydride and lithium mixture, operably connected to it so that heat is supplied from the thermal battery to a working fluid. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

Bennett, Charles L. (Livermore, CA)

2012-03-13T23:59:59.000Z

177

Rankine-Brayton engine powered solar thermal aircraft  

DOE Patents [OSTI]

A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight. The Rankine-Brayton engine has a thermal battery, preferably containing a lithium-hydride and lithium mixture, operably connected to it so that heat is supplied from the thermal battery to a working fluid. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

Bennett, Charles L. (Livermore, CA)

2009-12-29T23:59:59.000Z

178

Waverly Light and Power - Residential Solar Thermal Rebates | Department of  

Broader source: Energy.gov (indexed) [DOE]

Solar Thermal Rebates Solar Thermal Rebates Waverly Light and Power - Residential Solar Thermal Rebates < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate $3,500 Program Info Start Date 07/01/2009 State Iowa Program Type Utility Rebate Program Rebate Amount 30/sq. foot of collector area Provider Waverly Light and Power Waverly Light and Power (WL&P) offers rebates for solar hot water heating systems to its residential customers. All purchases must be pre-approved through WL&P's solar water heater application process. In addition, residential customers must obtain a county-issued permit prior to installing a solar water heating system. There is a limit of one rebate per address. Funding is available until the rebate fund is exhausted.

179

Development of a Web-based Emissions Reduction Calculator for Solar Thermal and Solar Photovoltaic Installations  

E-Print Network [OSTI]

DEVELOPMENT OF A WEB-BASED EMISSIONS REDUCTION CALCULATOR FOR SOLAR THERMAL AND SOLAR PHOTOVOLTAIC INSTALLATIONS Juan-Carlos Baltazar Research Associate Jeff S. Haberl, Ph.D., P.E. Professor/Associate Director Don R. Gilman, P.E. Senior... the potential emission reductions due to the electricity savings from the application of some of the most common solar thermal and solar photovoltaic systems. The methodology to estimate the potential NOx emission reduction integrates legacy analysis tools...

Baltazar-Cervantes, J. C.; Gilman, D.; Haberl, J. S.; Culp, C.

2005-01-01T23:59:59.000Z

180

A NEW SOLAR THERMAL RECEIVER UTILIZING A SMALL PARTICLE HEAT EXCHANGER  

E-Print Network [OSTI]

Report LBL 8520. ) A NEW SOLAR THERMAL RECEIVER UTILIZING Aenergy. A new type of solar thermal receiver based on thisThe success of the solar thermal electric power program

Hunt, Arlon J.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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

Development of Non?Tracking Solar Thermal Technology  

Science Journals Connector (OSTI)

The aims of this research is to develop high temperature solar thermal collectors that do not require complex solar tracking devices to maintain optimal performance. The collector technology developed through these efforts uses non?imaging optics and is referred to as an external compound parabolic concentrator. It is able to operate with a solar thermal efficiency of approximately 50% at a temperature of 200?°?C and can be readily manufactured at a cost between $15 and $18 per square foot.

2011-01-01T23:59:59.000Z

182

Windmill tower  

SciTech Connect (OSTI)

A windmill tower supports a propeller and a platform that in turn supports a propeller feather control system and a generator system. The entire tower rotates at its base under changes in wind direction so the rotating propeller is constantly maintained upwind of the tower. The tower is a rigid structure that withstands cyclic thrust and torque loading sufficiently to reduce resonant vibrations of the tower as the propeller rotates under the influence of the wind. The resonant frequency of the tower can be higher than the passing frequency of the rotating propeller blades. The tower includes a pair of generally upright fore legs that converge upwardly toward a first apex on the propeller axis of rotation near the front of the platform immediately behind the propeller hub. A diagonal bracing strut extends downwardly from the first apex away from the plane of the fore legs and toward the rear of the tower. The bottoms of the fore legs and the diagonal bracing strut are rigidly interconnected by base plane truss members. A pair of upwardly converging aft legs extend diagonally upwardly from the bottoms of the fore legs toward a second apex aft of the first apex at the rear of the platform. At regular vertical intervals, stiffening trusses add rigidity to the main upright members of the tower structure. The natural frequency of the tower is raised by the fore legs and the diagonal bracing strut being interconnected in a rigid base plane truss. The diagonal bracing strut resists thrust loading on the tower, and the fore legs and aft legs resist torsional forces produced at the top of the tower.

Schachle, C.; Schachle, E.C.; Schachle, J.R.; Schachle, P.J.

1982-04-06T23:59:59.000Z

183

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode. 5 figures.

Prueitt, M.L.

1994-02-08T23:59:59.000Z

184

Solar Keymark-Experiences with the European Solar Thermal Quality Label  

Science Journals Connector (OSTI)

Many aspects come to mind when thinking and talking about technically reliable and long-time durable solar thermal products. The following paper tries to answer...

Korbinian Kramer; Matthias Rommel…

2009-01-01T23:59:59.000Z

185

Sandia National Laboratories: Power Towers for Utilities  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Engine Test Facility Central Receiver Test Facility Power Towers for Utilities Solar Furnace Dish Test Facility Optics Lab Parabolic Dishes Work For Others (WFO) User...

186

Sandia National Laboratories: National Solar Thermal Testing...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Beam Profiling On November 2, 2012, in Concentrating Solar Power, News, Renewable Energy, Solar On Thursday, June 7, we began beam profiling the NSTTF field heliostat beam....

187

In-Situ Preparation and thermal shock resistance of mullite-cordierite heat tube material for solar thermal power  

Science Journals Connector (OSTI)

In order to improve the thermal shock resistance of solar thermal heat transfer tube material, the mullite-cordierite composite ceramic as solar thermal heat transfer tube material were fabricated by...?-Al2O3......

Xiaohong Xu ???; Xionghua Ma; Jianfeng Wu…

2013-06-01T23:59:59.000Z

188

Minnesota Power - Solar-Thermal Water Heating Rebate Program | Department  

Broader source: Energy.gov (indexed) [DOE]

Minnesota Power - Solar-Thermal Water Heating Rebate Program Minnesota Power - Solar-Thermal Water Heating Rebate Program Minnesota Power - Solar-Thermal Water Heating Rebate Program < Back Eligibility Commercial Industrial Low-Income Residential Multi-Family Residential Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate Single-family unit: $2,000 Two- to three-family units: $4,000 Multi-family units (four or more): $10,000 Businesses: $25,000 Program Info Start Date 03/2010 Expiration Date 12/31/2013 State Minnesota Program Type Utility Rebate Program Rebate Amount 25% of costs Provider Minnesota Power Minnesota Power offers a 25% rebate for qualifying solar thermal water heating systems. The maximum award for single-family customers is $2,000 per customer; $4,000 for 2-3 family unit buildings; $10,000 for buildings

189

Made in Minnesota Solar Thermal Rebate | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Made in Minnesota Solar Thermal Rebate Made in Minnesota Solar Thermal Rebate Made in Minnesota Solar Thermal Rebate < Back Eligibility Commercial Multi-Family Residential Residential Savings Category Heating & Cooling Solar Swimming Pool Heaters Water Heating Buying & Making Electricity Commercial Heating & Cooling Maximum Rebate Single-Family Residential: $2,500 Multi-Family Residential: $5,000 Commercial: $25,000 Program Info Start Date 1/1/2014 Expiration Date 12/31/2023 State Minnesota Program Type State Rebate Program Rebate Amount 25% Provider Minnesota Department of Commerce Beginning in 2014, the Department of Commerce will offer a Made in Minnesota Solar Thermal Rebate program. Rebates are 25% of installed costs, with a $2,500 maximum for residential systems, $5,000 maximum for multi-family residential systems, and $25,000 for commercial systems.

190

Optical Analysis and Thermal Modeling of a Window for a Small Particle Solar Receiver  

Science Journals Connector (OSTI)

Abstract Concentrated solar power (CSP) systems use heliostats to concentrate solar radiation in order to produce high temperature heat, which drives a turbine to generate electricity. A 5 \\{MWth\\} Small Particle Solar Receiver is being developed for power tower CSP plants based on volumetric absorption by a gas-particle suspension by the support from the U.S. Department of Energy under the SunShot Initiative. The radiation enters the pressurized receiver (0.5 MPa) through a curved window, which must sustain the thermal loads from the concentrated solar flux and infrared reradiation from inside the receiver. The thermal load from the solar flux on the window is calculated by using the computer code MIRVAL from Sandia National Laboratory which uses the Monte Carlo Ray Trace (MCRT) method, along with two other codes developed by the authors. Thermal loading was calculated from energy absorbed at various points throughout the window from both the heliostat field and inside the receiver. Transmission and reflective losses were also calculated for different window materials in order to find out how much radiation will enter the receiver or will be lost. The three dimensional temperature distribution of the window is analyzed by an energy balance taking into account spectral volumetric absorption, spectral surface emission, conduction within the window, and convection from both surfaces. A maximum window temperature of 800 °C must be enforced to prevent cracking and/or devitrification due to overheating. Several grades of quartz are considered for this study with detailed spectral calculations. For a chosen material, the window temperature was found to be held under 800 °C. The results showed that most of the heat load on the window comes from the inside of receiver due to spectral variation.

A.M. Mecit; F.J. Miller; A. Whitmore

2014-01-01T23:59:59.000Z

191

Concentrating Solar Power Thermal Storage System Basics | Department of  

Broader source: Energy.gov (indexed) [DOE]

Thermal Storage System Basics Thermal Storage System Basics Concentrating Solar Power Thermal Storage System Basics August 21, 2013 - 10:33am Addthis One challenge facing the widespread use of solar energy is reduced or curtailed energy production when the sun sets or is blocked by clouds. Thermal energy storage provides a workable solution to this challenge. In a concentrating solar power (CSP) system, the sun's rays are reflected onto a receiver, which creates heat that is used to generate electricity. If the receiver contains oil or molten salt as the heat-transfer medium, then the thermal energy can be stored for later use. This enables CSP systems to be cost-competitive options for providing clean, renewable energy. Several thermal energy storage technologies have been tested and

192

Residential solar-absorption chiller thermal dynamics  

SciTech Connect (OSTI)

Research is reported on the transient performance of a commercial residential 3 ton lithium bromide-water absorption chiller designed for solar firing. Emphasis was placed on separating the chiller response from that of the entire test facility so that its transient response could solely be observed and quantified. It was found that the entire system time response and thermal capacitance has a major impact on performance degradation due to transient operation. Tests run to ascertain computer algorithms which simulate system isolated chiller performance, revealed processes hitherto undocumented. Transient operation is simulated by three distinct algorithms associated with the three phases of chiller operation. The first phase is start up time. It was revealed during testing that the time required to reach steady state performance values, when the chiller was turned on, was a linear function of steady state water supply temperatures. The second phase is quasi steady state performance. Test facility's performance compared favorably with the manufacturer's published data. The third phase is the extra capacity produced during spin down. Spin down occurs when the hot water supply pump is turned off while the other system pumps remain operating for a few minutes, thus allowing extra chiller capacity to be realized. The computer algorithms were used to generate plots which show the operational surface of an isolated absorption chiller subjected to off design and transient operation.

Guertin, J.M.; Wood, B.D.; McNeill, B.W.

1981-03-01T23:59:59.000Z

193

Solar  

Science Journals Connector (OSTI)

With sharp drop in costs for photovoltaic and solar thermal processes, solar energy has become more attractive alternative ... Almost half the total was earmarked for PV and solar thermal projects. ...

WARD WORTHY

1991-06-17T23:59:59.000Z

194

Commercial Solar Thermal Incentive Program (Connecticut) | Department of  

Broader source: Energy.gov (indexed) [DOE]

Solar Thermal Incentive Program (Connecticut) Solar Thermal Incentive Program (Connecticut) Commercial Solar Thermal Incentive Program (Connecticut) < Back Eligibility Commercial Industrial Institutional Local Government Low-Income Residential Multi-Family Residential Nonprofit Schools Tribal Government Savings Category Heating & Cooling Solar Water Heating Maximum Rebate $150,000 Program Info Funding Source Public Benefits Fund Start Date 03/15/2013 State Connecticut Program Type State Grant Program Provider Clean Energy Finance and Investment Authority '''''Note: This program is not currently accepting applications. Check the program web site for information regarding future financing programs. ''''' The Clean Energy Finance and Investment Authority is offering grants and loans to non-residential entities for solar hot water installations. Only

195

Solar thermal power plants for the Spanish electricity market  

Science Journals Connector (OSTI)

Solar thermal power plants are at present the cheapest technology for solar electricity production. At good sites Levelised Electricity Costs (LEC) of 11 Ct/kWh have been achieved in commercially operated power plants. Economy of scale and further technical improvements will reduce the LEC for future projects. On the 27th of March 2004 in Spain the existing feed-in-law has been modified in order to support the erection of solar thermal power plants and thus make use of the huge solar potential of Spain. A payment of approx. 21 Ct/kWh, guaranteed for the first 25 years of operation, makes the erection and operation of solar thermal power plants very profitable for possible investors on the Spanish peninsula. This paper will present the present situation in Spain and the planned power plant projects. For one specific project the set-up is presented in more detail.

M. Eck; F. Rueda; S. Kronshage; C. Schillings; F. Trieb; E. Zarza

2007-01-01T23:59:59.000Z

196

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Test Facility (NSTTF) Operated by Sandia National Laboratories for the U.S. Department of Energy (DOE), the National Solar Thermal Test Facility (NSTTF) is the only test facility...

197

Photoswitchable Molecular Rings for Solar-Thermal Energy Storage  

Science Journals Connector (OSTI)

Photoswitchable Molecular Rings for Solar-Thermal Energy Storage ... Ground-state energy barriers along the NN torsional coordinates were also computed, along with excitation energies and intensities for the species that can contribute to the photostationary state. ...

E. Durgun; Jeffrey C. Grossman

2013-03-04T23:59:59.000Z

198

The Exchange-Value of Solar Thermal Energy  

Science Journals Connector (OSTI)

In Sweden there is a tendency that alternative energy will develop on market premises. In this ... I suggest that the low exergy value of solar thermal heat limits the technique“s commodification, i ... . By appl...

Johan Leidi

2009-01-01T23:59:59.000Z

199

Marshall Municipal Utilities- Solar Thermal Water Heater Rebate Program  

Broader source: Energy.gov [DOE]

Marshall Municipal Utilities (MMU) offers residential customers rebates for installing a ENERGY STAR Solar Thermal Water Heater. Rebates are based on the size of the system; MMU offers $20 per...

200

Materials selection for thermal comfort in passive solar buildings  

Science Journals Connector (OSTI)

This paper presents the results of a combined analytical, computational, and experimental study of the key parameters for selecting affordable materials and designing for thermal comfort in passive solar build...

J. M. Thomas; S. Algohary; F. Hammad; W. O. Soboyejo

2006-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage  

E-Print Network [OSTI]

1980, but its thermal solar and storage systems received achiller. A 30 m heat storage tank solar decouples heatfacility with thermal storage and solar- assisted HVAC for

Mammoli, Andrea

2014-01-01T23:59:59.000Z

202

PERFORMANCE OF A CONCENTRATING PHOTOVOLTAIC/THERMAL SOLAR COLLECTOR  

E-Print Network [OSTI]

increased solar energy conversion and potential cost benefits (Fujisawa and Tani, 1997, 2001, Huang et alPERFORMANCE OF A CONCENTRATING PHOTOVOLTAIC/THERMAL SOLAR COLLECTOR Joe S Coventry Centre for Sustainable Energy Systems, Australian National University, Canberra, 0200, Australia +612 6125 3976, +612

203

Thermal efficiency of single-pass solar air collector  

SciTech Connect (OSTI)

Efficiency of a finned single-pass solar air collector was studied. This paper presents the experimental study to investigate the effect of solar radiation and mass flow rate on efficiency. The fins attached at the back of absorbing plate to improve the thermal efficiency of the system. The results show that the efficiency is increased proportional to solar radiation and mass flow rate. Efficiency of the collector archived steady state when reach to certain value or can be said the maximum performance.

Ibrahim, Zamry; Ibarahim, Zahari; Yatim, Baharudin [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan (Malaysia); Ruslan, Mohd Hafidz [Solar Energy Research Institute (SERI), Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan (Malaysia)

2013-11-27T23:59:59.000Z

204

10 MWe Solar Thermal Central Receiver Pilot Plant Total Capital Cost  

Science Journals Connector (OSTI)

A cost analysis of the 10MWe Solar One Thermal Central Receiver Plant near Barstow, California, ... is presented to help predict costs of future solar thermal central receiver plants. In this paper, the Solar One...

H. F. Norris

1985-01-01T23:59:59.000Z

205

Thermal storage module for solar dynamic receivers  

DOE Patents [OSTI]

A thermal energy storage system comprising a germanium phase change material and a graphite container.

Beatty, Ronald L. (Farragut, TN); Lauf, Robert J. (Oak Ridge, TN)

1991-01-01T23:59:59.000Z

206

District Cooling Using Central Tower Power Plant  

Science Journals Connector (OSTI)

Abstract During the operation of solar power towers there are occasions, commonly in the summer season, where some of the heliostats have to stop focusing at the central receiver, located at the top of the tower, because the maximum temperature that the receiver can withstand has been reached. The highest demands of cooling for air conditioning take place at these same occasions. In the present paper, we have analyzed the possibility of focusing the exceeding heliostats to the receiver increasing the mass flow rate of the heat transfer fluid over the nominal value and using the extra heat as a source of an absorption chiller. The chilled water would be used to cool buildings and offices, using a district cooling network. Using the extra heat of the solar power tower plant would greatly reduce the electricity usage. In this work we have analyzed the case of a circular field of heliostats focusing at a circular receiver, such as the case of Gemasolar plant. We have quantified the thermal power that can be obtained from the unused heliostats, the cooling capacity of the absorption system as well as the heat losses through the insulated pipes that distribute the chilled water to the buildings of the network.

C. Marugán-Cruz; S. Sánchez-Delgado; M.R. Rodríguez-Sánchez; M. Venegas

2014-01-01T23:59:59.000Z

207

High-Temperature Thermal Array for Next Generation Solar Thermal...  

Broader source: Energy.gov (indexed) [DOE]

outstanding technical challenges focused on applicability to heat pipes to Concentrated Solar Power production. These include * Counter gravity physics * Counter gravity...

208

Energy-Dependent Timing of Thermal Emission in Solar Flares  

Science Journals Connector (OSTI)

We report solar flare plasma to be multi-thermal in nature based on the theoretical model and study of the energy-dependent timing of thermal emission in ten M-class flares. We ... observed by the Si detector of ...

Rajmal Jain; Arun Kumar Awasthi; Arvind Singh Rajpurohit…

2011-05-01T23:59:59.000Z

209

Sandia National Laboratories: solar thermal electric technologies  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Plan Webinar Wednesday, Jan. 14 Sandian Presents on PV Failure Analysis at European PV Solar Energy Conference and Exhibition (EU PVSC) EC Top Publications Design and Analysis...

210

Design of a solar thermal collector simulator.  

E-Print Network [OSTI]

??The recent increased interest in renewable energy has created a need for research in the area of solar technology. This has brought about many new… (more)

Bolton, Kirk G.

2009-01-01T23:59:59.000Z

211

Solar thermal organic rankine cycle for micro-generation  

Science Journals Connector (OSTI)

The conceptual design of an Organic Rankine Cycle (ORC) driven by solar thermal energy is developed for the decentralized production of electricity of up to 50 kW. Conventional Rankine Cycle uses water as the working fluid whereas ORC uses organic compound as the working fluid and it is particularly suitable for low temperature applications. The ORC and the solar collector will be sized according to the solar flux distribution in the Republic of Yemen for the required power output of 50 kW. This will be a micro power generation system that consists of two cycles the solar thermal cycle that harness solar energy and the power cycle which is the ORC that generates electricity. As for the solar thermal cycle heat transfer fluid (HTF) circulates the cycle while absorbing thermal energy from the sun through a parabolic trough collector and then storing it in a thermal storage to increase system efficiency and maintains system operation during low radiation. The heat is then transferred to the organic fluid in the ORC via a heat exchanger. The organic fluids to be used and analyzed in the ORC are hydrocarbons R600a and R290.

2012-01-01T23:59:59.000Z

212

Modeling The Potential For Thermal Concentrating Solar Power Technologies  

SciTech Connect (OSTI)

In this paper we explore the tradeoffs between thermal storage capacity, cost, and other system parameters in order to examine possible evolutionary pathways for thermal Concen-trating Solar Power (CSP) technologies. A representation of CSP performance that is suit-able for incorporation into economic modeling tools is developed. We find that, as the fraction of electricity supplied by CSP technologies grows, the application of thermal CSP technologies might progress from current hybrid plants, to plants with a modest amount of thermal storage, and potentially even to plants with sufficient thermal storage to provide base load generation capacity. The representation of CSP cost and performance developed here was implemented in the ObjECTS MiniCAM long-term integrated assessment model. Datasets for global solar resource characteristics as applied to CSP technology were also developed. The regional and global potential of thermal CSP technologies is examined.

Zhang, Yabei; Smith, Steven J.; Kyle, G. Page; Stackhouse, Jr., Paul W.

2010-10-25T23:59:59.000Z

213

Use of Renewable Energy in Buildings: Experiences With Solar Thermal Utilization  

E-Print Network [OSTI]

Solar energy is receiving much more attention in building energy systems in recent years. Solar thermal utilization should be based on the integration of solar collectors into buildings. The facades of buildings can be important solar collectors...

Wang, R.; Zhai, X.

2006-01-01T23:59:59.000Z

214

Thermal instability in planar solar coronal structures  

Science Journals Connector (OSTI)

Prominentes and filaments are thought to arise as a consequence of a magnetized plasma undergoing thermal instability. Therefore the thermal stability of a magnetized plasma is investigated under coronal condi...

R. A. M. Van der Linden; M. Goossens

1990-01-01T23:59:59.000Z

215

Project Profile: Scattering Solar Thermal Concentrators  

Broader source: Energy.gov [DOE]

Pennsylvania State University, under the 2012 SunShot Concentrating Solar Power (CSP) R&D FOA, is designing and testing a novel solar collector system that relies on stationary optics, avoiding the need for mirror movement. The system is capable of achieving optical performance equal to state-of-the-art parabolic trough systems, but at a lower cost.

216

Optimisation of Solar Collector Area for Solar Thermal Systems  

Science Journals Connector (OSTI)

Invariably solar energy systems are provided with an auxiliary energy source to meet the energy requirements of a system operating at a constant temperature. A technoeconomic analysis has been developed in thi...

N. K. Bansal; Aman Dang

1984-01-01T23:59:59.000Z

217

A New Solar Carbon Capture Process: Solar Thermal Electrochemical Photo (STEP) Carbon Capture  

Science Journals Connector (OSTI)

A New Solar Carbon Capture Process: Solar Thermal Electrochemical Photo (STEP) Carbon Capture ... CO2 can be captured from 34% to over 50% solar energy efficiency (depending on the level of solar heat inclusion), as solid carbon and stored, or used as carbon monoxide to be available for a feedstock to synthesize (with STEP generated hydrogen) solar diesel fuel, synthetic jet fuel, or chemical production. ... STEP Iron, a Chemistry of Iron Formation without CO2 Emission: Molten Carbonate Solubility and Electrochemistry of Iron Ore Impurities ...

Stuart Licht; Baohui Wang; Susanta Ghosh; Hina Ayub; Dianlu Jiang; Jason Ganley

2010-07-14T23:59:59.000Z

218

Thermal layering: a passive solar design strategy  

SciTech Connect (OSTI)

SOLARGREEN was the author's entry into the US Department of Housing and Urban Development's Passive Solar Residential Design Competition. The objective of the design was to develop a low-cost, innovative passive solar heating and cooling system as part of a marketable, aesthetically pleasing dwelling that could be easily constructed using existing building practices. The basic design is a three-bedroom, two-story, 1600 square foot home with a solarium that serves as both a solar collector and a food-producing greenhouse. The entry received a design award and five construction awards in the competition.

Moore, F.

1980-01-01T23:59:59.000Z

219

High Temperature Thermal Array for Next Generation Solar Thermal...  

Broader source: Energy.gov (indexed) [DOE]

A 10% increase in shaft work is directly attributable to modified thermal heat capacity Engineering HTF Specific heat yields modified power output. 27 127 227 327 427 527...

220

Thermal Energy Transport in the Solar Wind  

Science Journals Connector (OSTI)

This paper is intended to summarize the present status of measurements of heat flux in the solar wind and to provide a comparison of these measurements with the theory for collision-dominated heat transport in...

Michael D. Montgomery

1972-01-01T23:59:59.000Z

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


221

Thermal Modernisation Through Utilisation of Solar Energy  

Science Journals Connector (OSTI)

The paper presents idea of modernization of energy system in buildings through implementation of traditional energy efficiency measures and introduction of modern options of utilization of solar energy systems...

Dorota Chwieduk

2009-01-01T23:59:59.000Z

222

Azobenzene-Functionalized Carbon Nanotubes As High-Energy Density Solar Thermal Fuels  

Science Journals Connector (OSTI)

Azobenzene-Functionalized Carbon Nanotubes As High-Energy Density Solar Thermal Fuels ... Solar thermal fuels, which reversibly store solar energy in molecular bonds, are a tantalizing prospect for clean, renewable, and transportable energy conversion/storage. ... Here we present a novel solar thermal fuel, composed of azobenzene-functionalized carbon nanotubes, with the volumetric energy density of Li-ion batteries. ...

Alexie M. Kolpak; Jeffrey C. Grossman

2011-06-20T23:59:59.000Z

223

Thermal performance evaluation of a solar air heater with and without thermal energy storage  

Science Journals Connector (OSTI)

This communication presents the experimental study and performance analysis of a solar air heater with and without phase change ... found that the output temperature in case with thermal energy storage (TES) is h...

V. V. Tyagi; A. K. Pandey; S. C. Kaushik…

2012-03-01T23:59:59.000Z

224

Non-thermal solar wind heating by supra-thermal ions  

Science Journals Connector (OSTI)

The effect of a new energy source due to energies transferred from supra-thermal secondary ions on the temperature profile of the solar wind has been considered. For this purpose ... solution of a tri-fluid model...

H. J. Fahr

1973-05-01T23:59:59.000Z

225

Experiments on solar absorption using a greenhouse-effect gas in a thermal solar collector  

Science Journals Connector (OSTI)

This paper investigates an augmentation to the thermal solar absorption of solar collectors by introducing a greenhouse gas between the glazing and the absorber part of the solar collector. Experiments are designed and conducted to compare the effect of adding the gas on the efficiency of the collector without that addition. The maximum temperature rise of the absorber the time of heat retention before reaching room temperature and the energy conversion efficiency in heating up water for domestic use were all studied.

Abdul Hai M. B. Alami

2010-01-01T23:59:59.000Z

226

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

227

Off-peak summer performance enhancement for rows of fixed solar thermal collectors using reflective surfaces.  

E-Print Network [OSTI]

??The possibility of increasing the efficiency of fixed solar thermal collectors without greatly adding to the cost or complexity of the overall solar collection system… (more)

Armenta, Casiano

2011-01-01T23:59:59.000Z

228

Solar thermal energy contract list, fiscal year 1990  

SciTech Connect (OSTI)

The federal government has conducted the national Solar Thermal Technology Program since 1975. Its purpose is to provide focus, direction, and funding for the development of solar thermal technology as an energy option for the United States. This year's document is more concise than the summaries of previous years. The FY 1990 contract overview comprises a list of all subcontracts begun, ongoing, or completed during FY 1990 (October 1, 1989, through September 30, 1990). Under each managing laboratory projects are listed alphabetically by project area and then by subcontractor name. Amount of funding milestones are listed.

Not Available

1991-09-01T23:59:59.000Z

229

Sandia National Laboratories: solar  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6, 2012, in Desirable Features of Power Towers for Utilities Because of their practical energy storage, solar power towers have two features that are particularly desirable for...

230

Best Management Practice: Cooling Tower Management | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Best Management Practice: Cooling Tower Management Best Management Practice: Cooling Tower Management Best Management Practice: Cooling Tower Management October 8, 2013 - 9:39am Addthis Cooling towers regulate temperature by dissipating heat from recirculating water used to cool chillers, air-conditioning equipment, or other process equipment. Heat is rejected from the tower primarily through evaporation. Therefore, by design, cooling towers consume significant amounts of water. Overview The thermal efficiency and longevity of the cooling tower and equipment used to cool depend on the proper management of water recirculated through the tower. Water leaves a cooling tower system in any one of four ways: Evaporation: This is the primary function of the tower and is the method that transfers heat from the cooling tower system to the

231

Technical assessment of solar thermal energy storage technologies  

Science Journals Connector (OSTI)

Solar energy is recognized as one of the most promising alternative energy options. On sunny days, solar energy systems generally collect more energy than necessary for direct use. Therefore, the design and development of solar energy storage systems, is of vital importance and nowadays one of the greatest efforts in solar research. These systems, being part of a complete solar installation, provide an optimum tuning between heat demand and heat supply. This paper reviews the basic concepts, systems design, and the latest developments in (sensible and latent heat) thermal energy storage. Parameters influencing the storage system selection, the advantages and disadvantages of each system, and the problems encountered during the systems operation are highlighted.

Hassan E.S. Fath

1998-01-01T23:59:59.000Z

232

Potential solar thermal integration in Spanish combined cycle gas turbines  

Science Journals Connector (OSTI)

Abstract Combined cycle gas turbines (CCGTs) are volumetric machines, which means that their net power output decreases at air temperatures above the design point. Such temperatures generally occur during periods of high solar irradiation. Many countries where these conditions occur, including Spain, have installed a significant number of \\{CCGTs\\} in recent years, with the subsequent yield losses in the summer. This implies enormous potential for solar hybridization, increasing production in peak hours and overall efficiency and reducing CO2 emissions. This paper analyzes the overall potential for solar thermal integration in 51 CCGTS (25,340 MW) in mainland Spain under different operating scenarios based on increasing yield, solar fraction and the hourly operational range adapted to the Spanish electricity market, considering actual meteorological conditions. A production model for integrating solar energy into combined cycles is proposed and described and the code in R is freely released so that the assessment can be replicated.

J. Antonanzas; E. Jimenez; J. Blanco; F. Antonanzas-Torres

2014-01-01T23:59:59.000Z

233

Thermal characteristics of a classical solar telescope primary mirror  

E-Print Network [OSTI]

We present a detailed thermal and structural analysis of a 2m class solar telescope mirror which is subjected to a varying heat load at an observatory site. A 3-dimensional heat transfer model of the mirror takes into account the heating caused by a smooth and gradual increase of the solar flux during the day-time observations and cooling resulting from the exponentially decaying ambient temperature at night. The thermal and structural response of two competing materials for optical telescopes, namely Silicon Carbide -best known for excellent heat conductivity and Zerodur -preferred for its extremely low coefficient of thermal expansion, is investigated in detail. The insight gained from these simulations will provide a valuable input for devising an efficient and stable thermal control system for the primary mirror.

Banyal, Ravinder K

2011-01-01T23:59:59.000Z

234

Semi-transparent solar energy thermal storage device  

DOE Patents [OSTI]

A visually transmitting solar energy absorbing thermal storage module includes a thermal storage liquid containment chamber defined by an interior solar absorber panel, an exterior transparent panel having a heat mirror surface substantially covering the exterior surface thereof and associated top, bottom and side walls. Evaporation of the thermal storage liquid is controlled by a low vapor pressure liquid layer that floats on and seals the top surface of the liquid. Porous filter plugs are placed in filler holes of the module. An algicide and a chelating compound are added to the liquid to control biological and chemical activity while retaining visual clarity. A plurality of modules may be supported in stacked relation by a support frame to form a thermal storage wall structure.

McClelland, John F. (Ames, IA)

1986-04-08T23:59:59.000Z

235

Semi-transparent solar energy thermal storage device  

DOE Patents [OSTI]

A visually transmitting solar energy absorbing thermal storage module includes a thermal storage liquid containment chamber defined by an interior solar absorber panel, an exterior transparent panel having a heat mirror surface substantially covering the exterior surface thereof and associated top, bottom and side walls, Evaporation of the thermal storage liquid is controlled by a low vapor pressure liquid layer that floats on and seals the top surface of the liquid. Porous filter plugs are placed in filler holes of the module. An algicide and a chelating compound are added to the liquid to control biological and chemical activity while retaining visual clarity. A plurality of modules may be supported in stacked relation by a support frame to form a thermal storage wall structure.

McClelland, John F. (Ames, IA)

1985-06-18T23:59:59.000Z

236

Solar Thermal Group Research School of Engineering  

E-Print Network [OSTI]

DEVELOPMENT OF COMPLEX OXIDE-BASED MATERIALS FOR HYBRID SOLAR THERMOELECTRIC GENERATOR Speaker: Dr Ruoming- and n- type thermoelectric materials. A number of strategies for enhancing the material efficiency were interests are in the development of oxide-based thermoelectric materials via ad- vanced synthesis

237

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with Combined Heat and Power  

E-Print Network [OSTI]

solar thermal and heat storage on CO 2 emissions and annual energyenergy costs, heat storage does not directly support solar thermal /energy costs. This paper focuses on analysis of the optimal interaction of solar thermal

Marnay, Chris

2010-01-01T23:59:59.000Z

238

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage  

E-Print Network [OSTI]

of a solar-thermal- assisted hvac system. Energy andsolar thermal collectors using flat reflective surfaces. Solar Energy,of a solar-assisted HVAC system with thermal storage. Energy

Mammoli, Andrea

2014-01-01T23:59:59.000Z

239

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage  

E-Print Network [OSTI]

performance of a solar-thermal- assisted hvac system. Energyfor rows of fixed solar thermal collectors using flatassisted by a 232 m solar thermal array providing heat to a

Mammoli, Andrea

2014-01-01T23:59:59.000Z

240

E-Print Network 3.0 - advanced solar thermal Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

..) - residential and commercial. (A. Athienitis) 2. Solar thermal systems for heating and cooling (DHW... and optimization tool. THEME 1 Integration THEME 2 Thermal THEME...

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


241

Two-tank indirect thermal storage designs for solar parabolic trough power plants.  

E-Print Network [OSTI]

??The performance of a solar thermal parabolic trough plant with thermal storage is dependent upon the arrangement of the heat exchangers that ultimately transfer energy… (more)

Kopp, Joseph E.

2009-01-01T23:59:59.000Z

242

Thermodynamic and design considerations of organic Rankine cycles in combined application with a solar thermal gas turbine  

Science Journals Connector (OSTI)

Concentrated Solar Power (CSP) technologies are considered to provide a significant contribution for the electric power production in the future. Different kinds of technologies are presently in operation or under development, e.g. parabolic troughs, central receivers, solar dish systems and Fresnel reflectors. This paper takes the focus on central receiver technologies, where the solar radiation is concentrated by a field of heliostats in a receiver on the top of a tall tower. To get this CSP technology ready for the future, the system costs have to reduce significantly. The main cost driver in such kind of CSP technologies are the huge amount of heliostats. To reduce the amount of heliostats, and so the investment costs, the efficiency of the energy conversion cycle becomes an important issue. An increase in the cycle efficiency results in a decrease of the solar heliostat field and thus, in a significant cost reduction. The paper presents the results of a thermodynamic model of an Organic Rankine Cycle (ORC) for combined cycle application together with a solar thermal gas turbine. The gas turbine cycle is modeled with an additional intercooler and recuperator and is based on a typical industrial gas turbine in the 2 MW class. The gas turbine has a two stage radial compressor and a three stage axial turbine. The compressed air is preheated within a solar receiver to 950°C before entering the combustor. A hybrid operation of the gas turbine is considered. In order to achieve a further increase of the overall efficiency, the combined operation of the gas turbine and an Organic Rankine Cycle is considered. Therefore an ORC has been set up, which is thermally connected to the gas turbine cycle at two positions. The ORC can be coupled to the solar-thermal gas turbine cycle at the intercooler and after the recuperator. Thus, waste heat from different cycle positions can be transferred to the ORC for additional production of electricity. Within this investigation different working fluids and ORC conditions have been analyzed in order to evaluate the best configuration. The investigations have been performed by application of improved thermodynamic and process analysis tools, which consider the real gas behavior of the analyzed fluids. The results show that by combined operation of the solar thermal gas turbine and the ORC, the combined cycle efficiency is approximately 4%-points higher than in the solar-thermal gas turbine cycle.

R Braun; K Kusterer; T Sugimoto; K Tanimura; D Bohn

2013-01-01T23:59:59.000Z

243

Solar thermal power generation: a bibliography with abstracts. Quarterly update, October-December 1979  

SciTech Connect (OSTI)

This annotated bibliography contains the following subjects: energy overviews, solar overviews, energy conservation, economics and law, solar thermal power, thermionic and thermoelectric, ocean thermal energy conversion, biomass and photochemical energy, and large-scale photovoltaics. (MHR)

Not Available

1980-04-01T23:59:59.000Z

244

Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion...  

Broader source: Energy.gov (indexed) [DOE]

Research Center of the DOE Office of Basic Energy Sciences SOLID-STATE SOLAR-THERMAL ENERGY CONVERSION CENTER Progress from DOE EFRC: Solid-State Solar-Thermal Energy...

245

Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion...  

Broader source: Energy.gov (indexed) [DOE]

Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion Center (S3TEC ) Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion Center (S3TEC )...

246

Outdoor and Indoor Testing to Increase the Efficiency and Durability of Flat Plate Solar Thermal Collectors  

Science Journals Connector (OSTI)

This paper presents the test performed on the solar thermal flat plate collector and the effect of saline aerosol on the solar thermal conversion; an assembly of testing rigs developed ... presented; the rigs all...

Daniela Ciobanu; Ion Visa; Anca Duta…

2014-01-01T23:59:59.000Z

247

Transient-heat-transfer and stress analysis of a thermal-storage solar cooker module  

E-Print Network [OSTI]

This paper details the analysis carried out in Solidworks to determine the best material and configuration of a thermal-storage solar cooker module.The thermal-storage solar cooker utilizes the high-latent-heat lithium ...

Zengeni, Hazel C

2014-01-01T23:59:59.000Z

248

Cogenerating Photovoltaic and Thermal Solar Collector  

E-Print Network [OSTI]

cell, 25% max ­ Steam power plant, 50% max · Data Centers in the U.S. ­ Demand increases as internet.2% of the nations electricity consumption · Load equivalent to 5 1000 MW power plants · Over 2.2 billion dollars applications #12;First Prototype Spring 2008 #12;#12;Experimental Results · Thermal power generated ­ 1.4 KW

Su, Xiao

249

Performance contracting for parabolic trough solar thermal systems  

SciTech Connect (OSTI)

Several applications of solar energy have proven viable in the energy marketplace, due to competitive technology and economic performance. One example is the parabolic trough solar collectors, which use focused solar energy to maximize efficiency and reduce material use in construction. Technical improvements are complemented by new business practices to make parabolic trough solar thermal systems technically and economically viable in an ever widening range of applications. Technical developments in materials and fabrication techniques reduce production cost and expand applications from swimming pool heating and service hot water, to higher-temperature applications such as absorption cooling and process steam. Simultaneously, new financing mechanisms such as a recently awarded US Department of Energy (DOE) Federal Energy Management Program (FEMP) indefinite quantity Energy Savings Performance Contract (Super ESPC) facilitate and streamline implementation of the technology in federal facilities such as prisons and military bases.

Brown, H.; Hewett, R.; Walker, A. [National Renewable Energy Lab., Golden, CO (United States); Gee, R.; May, K. [Industrial Solar Technology, Golden, CO (United States)

1997-12-31T23:59:59.000Z

250

Quality assurance of solar thermal systems with the ISFH-Input/Output-Procedure  

E-Print Network [OSTI]

. Supplementary sensors may be necessary for some special solar systems (e. g. solar systems with several storagesQuality assurance of solar thermal systems with the ISFH- Input/Output-Procedure Peter Paerisch/Output-Controllers for in situ and automatic function control of solar thermal systems that were developed within the research

251

Genetic algorithms used for the optimization of light-emitting diodes and solar thermal collectors  

E-Print Network [OSTI]

Genetic algorithms used for the optimization of light-emitting diodes and solar thermal collectors developed for the optimization of light-emitting diodes (LED) and solar thermal collectors. The surface a light-extraction efficiency of only 3.7%). The solar thermal collector we considered consists

Mayer, Alexandre

252

Solar Thermal Policy in the U.S.: A Review of Best Practices  

E-Print Network [OSTI]

Solar Thermal Policy in the U.S.: A Review of Best Practices in Leading States Renewable Energy are supported at the master's and doctoral levels. #12;Solar Thermal Policy in the U.S.: A Review of Best · Julie Bellino ­ Renewable Energy Vermont · Front Page Top Picture ­ Solar Thermal Array at Kent County

Delaware, University of

253

Thermal and Magnetic Parameters in Solar Flares Derived from GOES X-Ray Light Curves  

Science Journals Connector (OSTI)

......6110 6190 6220 6310 Thermal and Magnetic Parameters in Solar Flares Derived from...impulsive phase of 20 solar flares and to estimate the thermal and magnetic parameters...parameters and the thermal ones, have been applied not only to solar flares, but also......

Tetsuya T. Yamamoto; Takashi Sakurai

2010-06-25T23:59:59.000Z

254

Stirling Engines for Low-Temperature Solar-Thermal-Electric Power Generation  

E-Print Network [OSTI]

Stirling Engines for Low-Temperature Solar-Thermal- Electric Power Generation Artin Der Minassians-Temperature Solar-Thermal-Electric Power Generation by Artin Der Minassians Karshenasi (Amirkabir University-Temperature Solar-Thermal-Electric Power Generation Copyright c 2007 by Artin Der Minassians #12;1 Abstract Stirling

Sanders, Seth

255

Enhanced regeneration of degraded polymer solar cells by thermal annealing  

SciTech Connect (OSTI)

The degradation and thermal regeneration of poly(3-hexylethiophene) (P3HT):[6,6]-phenyl-C{sub 61}-butyric acid methyl ester (PCBM) and P3HT:indene-C{sub 60} bisadduct (ICBA) polymer solar cells, with Ca/Al and Ca/Ag cathodes and indium tin oxide/poly(ethylene-dioxythiophene):polystyrene sulfonate anode have been investigated. Degradation occurs via a combination of three primary pathways: (1) cathodic oxidation, (2) active layer phase segregation, and (3) anodic diffusion. Fully degraded devices were subjected to thermal annealing under inert atmosphere. Degraded solar cells possessing Ca/Ag electrodes were observed to regenerate their performance, whereas solar cells having Ca/Al electrodes exhibited no significant regeneration of device characteristics after thermal annealing. Moreover, the solar cells with a P3HT:ICBA active layer exhibited enhanced regeneration compared to P3HT:PCBM active layer devices as a result of reduced changes to the active layer morphology. Devices combining a Ca/Ag cathode and P3HT:ICBA active layer demonstrated ?50% performance restoration over several degradation/regeneration cycles.

Kumar, Pankaj, E-mail: pankaj@mail.nplindia.ernet.in [CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012 (India); Centre for Organic Electronics, Physics, University of Newcastle, Callaghan NSW-2308 (Australia); Bilen, Chhinder; Zhou, Xiaojing; Belcher, Warwick J.; Dastoor, Paul C., E-mail: Paul.Dastoor@newcastle.edu.au [Centre for Organic Electronics, Physics, University of Newcastle, Callaghan NSW-2308 (Australia); Feron, Krishna [Centre for Organic Electronics, Physics, University of Newcastle, Callaghan NSW-2308 (Australia); CSIRO Energy Technology, P. O. Box 330, Newcastle NSW 2300 (Australia)

2014-05-12T23:59:59.000Z

256

Exergetic optimization of solar collector and thermal energy storage system  

Science Journals Connector (OSTI)

This paper deals with the exergetic optimization of a solar thermal energy system. This consists of a solar collector (SC) and a rectangular water storage tank (ST) that contains a phase change material (PCM) distributed in an assembly of slabs. The study takes into account both conduction and convection heat transfer mode for water in the SC, and also the phase change process for the PCM in the ST. An analytical solution for the melting process in the PCM is also presented. The results of the study are compared with previous experimental data, confirming the accuracy of the model. Results of a numerical case study are presented and discussed.

F. Aghbalou; F. Badia; J. Illa

2006-01-01T23:59:59.000Z

257

Mobile-mirror concentrators for solar thermal power plants  

SciTech Connect (OSTI)

Seven central-receiver, solar-thermal power plants with heliostat concentrators have been built around the world in the last two decades. This technology has proven to be much too expensive for commercial power plants and efforts to reduce the cost have reached an impasse. It is the nature of the solar concentrators which makes it so expensive. There are two types of concentrators: those, called heliostats, with mirrors on stationary supports, and those with mirrors on mobile supports. Mobile mirrors are potentially much cheaper than heliostats.

Ratliff, G. [Ratliff (George), Pittsburgh, PA (United States)

1999-11-01T23:59:59.000Z

258

Review and perspectives on Life Cycle Analysis of solar technologies with emphasis on building-integrated solar thermal systems  

Science Journals Connector (OSTI)

Abstract Building-Integrated (BI) solar thermal are systems which are integrated into the building, are a new tendency in the building sector and they provide multiple advantages in comparison with the Building-Added (BA) solar thermal configurations. The present investigation is a critical review about Life Cycle Analysis (LCA) studies of solar systems. Emphasis is given on the BI solar thermal installations. Studies about BA configurations and systems which produce electrical (or electrical/thermal) energy are also presented in order to provide a more complete overview of the literature. The influence of the BI solar thermal systems on building environmental profile is also examined. Critical issues such as ongoing standardization and environmental indicators are discussed. The results reveal that there is a gap in the field of LCA about real BI solar thermal (and solar thermal/electrical) installations. Thus, there is a need for more LCA studies which examine the BI solar thermal system itself and/or in conjunction with the building. Active systems which could provide energy for the building would be interesting to be studied. Investigations about the influence of the BI solar thermal systems on building life-cycle performance could also provide useful information in the frame of a more sustainable built environment.

Chr. Lamnatou; D. Chemisana; R. Mateus; M.G. Almeida; S.M. Silva

2015-01-01T23:59:59.000Z

259

An investigation of the efficiency of the receiver of a solar thermal cooker with thermal energy storage.  

E-Print Network [OSTI]

??A small scale solar concentrator cooker with a thermal energy storage system was designed, constructed and tested on the roof of the Physics building at… (more)

Heilgendorff, Heiko Martin.

2015-01-01T23:59:59.000Z

260

Novel Thermal Storage Technologies for Concentrating Solar Power Generation  

SciTech Connect (OSTI)

The technologies that are to be developed in this work will enable storage of thermal energy in 100 MWe solar energy plants for 6-24 hours at temperatures around 300oC and 850oC using encapsulated phase change materials (EPCM). Several encapsulated phase change materials have been identified, fabricated and proven with calorimetry. Two of these materials have been tested in an airflow experiment. A cost analysis for these thermal energy storage systems has also been conducted that met the targets established at the initiation of the project.

Neti, Sudhakar; Oztekin, Alparslan; Chen, John; Tuzla, Kemal; Misiolek, Wojciech

2013-06-20T23:59:59.000Z

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


261

SolarOil Project, Phase I preliminary design report. [Solar Thermal Enhanced Oil Recovery project  

SciTech Connect (OSTI)

The preliminary design of the Solar Thermal Enhanced Oil Recovery (SolarOil) Plant is described in this document. This plant is designed to demonstrate that using solar thermal energy is technically feasible and economically viable in enhanced oil recovery (EOR). The SolarOil Plant uses the fixed mirror solar concentrator (FMSC) to heat high thermal capacity oil (MCS-2046) to 322/sup 0/C (611/sup 0/F). The hot fluid is pumped from a hot oil storage tank (20 min capacity) through a once-through steam generator which produces 4.8 MPa (700 psi) steam at 80% quality. The plant net output, averaged over 24 hr/day for 365 days/yr, is equivalent to that of a 2.4 MW (8.33 x 10/sup 6/ Btu/hr) oil-fired steam generator having an 86% availability. The net plant efficiency is 57.3% at equinox noon, a 30%/yr average. The plant will be demonstrated at an oilfield site near Oildale, California.

Baccaglini, G.; Bass, J.; Neill, J.; Nicolayeff, V.; Openshaw, F.

1980-03-01T23:59:59.000Z

262

Baoding Solar Thermal Equipment Company | Open Energy Information  

Open Energy Info (EERE)

Equipment Company Equipment Company Jump to: navigation, search Name Baoding Solar Thermal Equipment Company Place Baoding, Hebei Province, China Sector Solar Product Solar water heating system manufacturer. Coordinates 38.855011°, 115.480217° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.855011,"lon":115.480217,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

263

Technical and economical evaluation of solar thermal power generation  

Science Journals Connector (OSTI)

This article presents a feasibilty on a solar power system based on the Stirling dish (SD) technology, reviews and compares the available Stirling engines in the perspective of a solar Stirling system. The system is evaluated, as a parameter to alleviate the energy system of the Cretan island while taking care of the CO2 emissions. In the results a sensitivity analysis was implemented, as well as a comparison with conventional power systems. In the long-term, solar thermal power stations based on a SD can become a competitive option on the electricity market, if a concerted programme capable of building the forces of industry, finance, insurance and other decision makers will support the market extension for this promising technology.

Theocharis Tsoutsos; Vasilis Gekas; Katerina Marketaki

2003-01-01T23:59:59.000Z

264

Thermal insulation with paper honeycombs with solar gain  

SciTech Connect (OSTI)

In this contribution the authors describe the concept and the model for the heat flux and the effective U-value of paper honeycombs (PHC) used as efficient and cheap transparent insulation material. With this thermal-insulation-material static U-values of U = 0.25 W/(m{sup 2}K) are obtained due to the very low thermal conduction value {lambda} = 0.04 W/(mK), which is comparable to thermal insulators as PU-foam or mineral wool. Contrary to conventional insulation materials PHC also gathers solar radiation due to its geometry, thereby providing heat flux into the interior of the building. Because the angle of incidence of the sun in wintertime is low, the direct solar radiation is absorbed approximately within the outermost 3 centimeters of the PHC. Even at ambient temperatures below 0 C, this region is warmed up to 60 C. By conduction the heat is brought to the brick wall underneath, which acts as reservoir and gets to temperatures between 15 and 30 C. Calculated across the full heating period, it is shown, that effective U values of 0.14 W/(m{sup 2}K) are reached by using PHC, reducing the brick wall U value by a factor of 3/4. Contrary to other transparent thermal insulation systems, e.g. developed by the Fraunhofer Institute for Solar Energy Systems, this system does not overheat during summertime, because the capillary structure is shielding the solar rays. A Windows based program solves the heat conduction equation with finite element methods.

Hingerl, K.; Baumgartner, G.; Aschauer, H.

1996-12-31T23:59:59.000Z

265

Sandia National Laboratories: solar power  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Features of Power Towers for Utilities Because of their practical energy storage, solar power towers have two features that are particularly desirable for utilities: flexible...

266

Sandia National Laboratories: Solar Research  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6, 2012, in Desirable Features of Power Towers for Utilities Because of their practical energy storage, solar power towers have two features that are particularly desirable for...

267

Far-IR and radio thermal continua in solar flares  

E-Print Network [OSTI]

With the invention of new far-infrared (FIR) and radio mm and sub-mm instruments (DESIR on SMESE satellite, ESO-ALMA), there is a growing interest in observations and analysis of solar flares in this so far unexplored wavelength region. Two principal radiation mechanisms play a role: the synchrotron emission due to accelerated particle beams moving in the magnetic field and the thermal emission due to the energy deposit in the lower atmospheric layers. In this contribution we explore the time-dependent effects of beams on thermal FIR and radio continua. We show how and where these continua are formed in the presence of time dependent beam heating and non-thermal excitation/ionisation of the chromospheric hydrogen plasma.

Kašparová, J; Karlický, M; Moravec, Z; Varady, M

2009-01-01T23:59:59.000Z

268

Potential Impact of ZT = 4 Thermoelectric Materials on Solar Thermal Energy Conversion Technologies  

Science Journals Connector (OSTI)

Photovoltaic and solar-thermal are two conversion technologies receiving a great deal of attention. ... Solar-thermal conversion uses the full solar spectrum and generates electricity by conventional electromagnetic induction methods. ... Resource and environmental impact considerations will play an increasingly important role in reaching decisions concerning the practicality of thermoelectric power generation systems. ...

Ming Xie; Dieter M. Gruen

2010-03-02T23:59:59.000Z

269

Flexible Hybrid Energy Cell for Simultaneously Harvesting Thermal, Mechanical, and Solar Energies  

Science Journals Connector (OSTI)

Flexible Hybrid Energy Cell for Simultaneously Harvesting Thermal, Mechanical, and Solar Energies ... We report the first flexible hybrid energy cell that is capable of simultaneously or individually harvesting thermal, mechanical, and solar energies to power some electronic devices. ... By integrating the NGs and the solar cells, a hybrid energy cell was fabricated to simultaneously harvest three different types of energies. ...

Ya Yang; Hulin Zhang; Guang Zhu; Sangmin Lee; Zong-Hong Lin; Zhong Lin Wang

2012-12-03T23:59:59.000Z

270

Corrigenda for Solar Engineering of Thermal Processes, Fourth Ed. J. A. Duffie and W. A. Beckman  

E-Print Network [OSTI]

Corrigenda for Solar Engineering of Thermal Processes, Fourth Ed. J. A. Duffie and W. A. Beckman 2 Last Eqn on page Second Ti should be Ti-1 #12;Corrigenda for Solar Engineering of Thermal Processes "radiation on" to "radiation at solar noon on" Second equation Change G to Gb + Gd Six lines from bottom

Wisconsin at Madison, University of

271

Propagation of three--dimensional Alfv'en waves in a stratified, thermally conducting solar wind  

E-Print Network [OSTI]

Propagation of three--dimensional Alfv'en waves in a stratified, thermally conducting solar wind S to the well--known thermal expansion of the solar corona [Parker, 1958, 1963, 1991]. In particular Alfv'en waves in the solar atmosphere and wind, taking into account relevant physical effects

272

A Continuous Solar Thermochemical Hydrogen Production Plant Design  

E-Print Network [OSTI]

16, 2013 [22] “Solar Central Power Towers. ” Web. 22 AprilA diagram of the solar field, the receiver tower, the NaCl

Luc, Wesley Wai

273

Project Profile: High-Temperature Thermal Array for Next-Generation Solar Thermal Power Production  

Broader source: Energy.gov [DOE]

The Los Alamos National Laboratory (ORNL), under the National Laboratory R&D competitive funding opportunity, is developing a megawatt-scale heat pipe–based technology designed to bridge the heliostat reflector field and the power cycle by replacing both the solar receiver and the heat transfer fluid (HTF) system used in concentrating solar power (CSP) systems. The technology, called the high-temperature thermal array, aims to achieve the SunShot Initiative's goals by addressing technical challenges, reducing capital and operating expenses, and increasing net photon-to-electricity conversion efficiency.

274

Thermal Efficiency of Solar Collector Made from Thermoplastics  

Science Journals Connector (OSTI)

Abstract Thermoplastics solar collectors have been used to replace a typical metal collector because their mechanical and physical properties make the volume production of lightweight, low cost and corrosion resistance. Effect of thermal conductivity and collector area was observed for four type of themoplastics based i.e PVC-B (PVC: Polyvinyl Chloride-Blue), PB (PB: Polybutene), PP-R (PP-R: Polypropylene Random Copolymer) and PVC-CB: (Polyvinyl Chloride-Carbon Black). The collector area of 2 m2 were prepared as for solar collector. The position of collector panel to south orientation and angle of 140 to the horizontal, which was the collector slope obtaining highest annual efficiency in Thailand, were implemented. Data was collected by data logger from 9.00-16.00 am throughout the day in which temperature reached a sufficient level according to standard test method of ASHRAE 93 77. The mass flow rate of water in collector was 0.02 (kg.s-1). The results of the differing thermal conductivity materials have indicated that there is no different of the materials on collector thermal efficiency. The collector efficiency was depends on the areas of the panel. This suggestion that one material should not only be chosen over another in term of its ability to transfer heat to the liquid within the panel but also collector area.

Warunee Ariyawiriyanan; Tawatchai Meekaew; Manop Yamphang; Pongpitch Tuenpusa; Jakrawan Boonwan; Nukul Euaphantasate; Pongphisanu Muangchareon; Supachat Chungpaibulpatana

2013-01-01T23:59:59.000Z

275

Thermal Load based Adaptive Tracking for Flat Plate Solar Collectors  

Science Journals Connector (OSTI)

Abstract The energy output of solar-thermal systems using flat plate collectors can be improved by tracking. Tracking is well known as a path for increasing the amount of solar radiation received by the collector; additionally the paper proposes a new concept that considers the inverse tracking as a viable option for protecting the collectors against overheating. An analysis of the thermal energy output and conversion efficiency is done considering forward tracking in three different days with different radiation profile (cloudy, sunny and mixed days), followed by an analysis of the inverse tracking concept. The in-field data show that there is a limiting angle below which inverse tracking is not effective and this value is estimated at 40° as compared with the optimal orientation. A logical scheme is proposed based on four different programs for forward tracking, inverse tracking, maximum inverse tracking or fixing the collector; this decisional scheme covers a broad range of functional situations having as central concept the production of thermal energy only when needed, for satisfying the demand, decreasing the energy consumption for forced circulation and supporting the systems reliability and safety.

Mircea Neagoe; Ion Visa; Bogdan G. Burduhos; Macedon D. Moldovan

2014-01-01T23:59:59.000Z

276

Cooling Towers, Energy Conservation Strategies  

E-Print Network [OSTI]

undersized due to the low bidder syndrome (1). 4. New plant expansion needs colder temperatures off the tower. State of the Art Upgrading Users of cooling towers are not par ticularly concerned with the thermal analysis involving calculus, or delving... HISTORY I Anhydrous Ammonia Plant The Hawkeye Chemical Corporation, a subsidiary of the Getty Oil Company, pro jected a 50% expansion of their anhydroug ammonia output from 120,000 tons (1.09 Kg) per year to ~ production level of 225,000 tons (2...

Burger, R.

1983-01-01T23:59:59.000Z

277

Fifth parabolic dish solar thermal power program annual review: proceedings  

SciTech Connect (OSTI)

The primary objective of the Review was to present the results of activities within the Parabolic Dish Technology and Module/Systems Development element of the Department of Energy's Solar Thermal Energy Systems Program. The Review consisted of nine technical sessions covering overall Project and Program aspects, Stirling and Brayton module development, concentrator and engine/receiver development, and associated hardware and test results to date; distributed systems operating experience; international dish development activities; and non-DOE-sponsored domestic dish activities. A panel discussion concerning business views of solar electric generation was held. These Proceedings contain the texts of presentations made at the Review, as submitted by their authors at the beginning of the Review; therefore, they may vary slightly from the actual presentations in the technical sessions.

None

1984-03-01T23:59:59.000Z

278

Different Models for Determination of Thermal Stratification in A Solar Storage Tank  

Science Journals Connector (OSTI)

In this work two different models are shown for describing the thermal stratification in the solar storage tank of the solar water heating system. The first model was ... hour from the average hourly data of the

P. Géczy-Víg; I. Farkas

2009-01-01T23:59:59.000Z

279

Thermal and Magnetic Parameters in Solar Flares Derived from GOES X-Ray Light Curves  

Science Journals Connector (OSTI)

......released amount of energy in a solar flare, and there...the derived thermal energy with the magnetic free energy. It is found that...Japan and Nobeyama Solar Radio Observatory...is a collaborative project involving the NRL......

Tetsuya T. Yamamoto; Takashi Sakurai

2010-06-25T23:59:59.000Z

280

Attraction of carbon investments to implement the solar energy thermal utilization projects  

Science Journals Connector (OSTI)

The possibilities for attracting investments of carbon funds to implement solar energy thermal projects using solar collectors under the Clean Development Mechanism are ... about 10% of the funds required for project

R. A. Zakhidov

2007-10-01T23:59:59.000Z

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


281

Solar-Thermal Processing of Methane to Produce Hydrogen and Syngas  

Science Journals Connector (OSTI)

A solar-thermal aerosol flow reactor has been constructed, installed, and tested with the High-Flux Solar Furnace (HFSF) at the National Renewable Energy Laboratory (NREL). Experiments were successfully carried out for the dissociation of methane to ...

Jaimee K. Dahl; Joseph Tamburini; Alan W. Weimer; Allan Lewandowski; Roland Pitts; Carl Bingham

2001-07-27T23:59:59.000Z

282

Thermal lens effect in solar-pumped high-power solid-state lasers  

Science Journals Connector (OSTI)

The thermal lens effect in the Nd:YAG laser rods pumped with a concentrated solar flux of the Big Solar Furnace of the NPO Fizika-Solntse of...

S. A. Bakhramov; Sh. D. Paiziev; Sh. I. Klychev; A. K. Kasimov…

2007-09-01T23:59:59.000Z

283

SOLAR MERIDIONAL CIRCULATION FROM DOPPLER SHIFTS OF THE Fe I LINE AT 5250 A AS MEASURED BY THE 150-FOOT SOLAR TOWER TELESCOPE AT THE MT. WILSON OBSERVATORY  

SciTech Connect (OSTI)

Doppler shifts of the Fe I spectral line at 5250 A from the full solar disk obtained over the period 1986 to 2009 are analyzed to determine the circulation velocity of the solar surface along meridional planes. Simultaneous measurements of the Zeeman splitting of this line are used to obtain measurements of the solar magnetic field that are used to select low field points and impose corrections for the magnetically induced Doppler shift. The data utilized is from a new reduction that preserves the full spatial resolution of the original observations so that the circulation flow can be followed to latitudes of 80{sup 0} N/S. The deduced meridional flow is shown to differ from the circulation velocities derived from magnetic pattern movements. A reversed circulation pattern is seen in polar regions for three successive solar minima. A surge in circulation velocity at low latitudes is seen during the rising phases of cycles 22 and 23.

Ulrich, Roger K. [Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1562 (United States)

2010-12-10T23:59:59.000Z

284

Solar-thermal-energy collection/storage-pond system  

DOE Patents [OSTI]

A solar thermal energy collection and storage system is disclosed. Water is contained, and the water surface is exposed directly to the sun. The central part of an impermeable membrane is positioned below the water's surface and above its bottom with a first side of the membrane pointing generally upward in its central portion. The perimeter part of the membrane is placed to create a watertight boundary separating the water into a first volume which is directly exposable to the sun and which touches the membranes first side, and a second volumn which touches the membranes second side. A salt is dissolved in the first water volume.

Blahnik, D.E.

1982-03-25T23:59:59.000Z

285

Analysis of the rigid porous manifold as an effevtive device to stratify solar thermal storage tanks.  

E-Print Network [OSTI]

??One of the most effective and simplest methods to maintain thermal stratification of solar hot water storage tanks during charge and discharge is the use… (more)

Ghosh, Vivekananda

2011-01-01T23:59:59.000Z

286

High Temperature InGaN Topping Cells for Hybrid Photovoltaic/Concentrating Solar Thermal Systems  

Science Journals Connector (OSTI)

Hybrid PV/CSP systems offer the potential of higher solar to grid efficiency, with the benefits of dispatchable electricity from thermal storage. Here we present an implementation...

Honsberg, Christiana; Gleckman, Philip; Doolittle, William A; Ponce, Fernando; Arena, Chantal; Vasileska, Dragica; Goodnick, Stephen M

287

Residential building solar thermal analysis| A case study on Sophia Gordon Hall.  

E-Print Network [OSTI]

?? Solar thermal technologies, such as residential hot water heating and space conditioning, have potential for reducing green house gas emissions and fossil fuel consumption.… (more)

Trethewey, Ross M.

2010-01-01T23:59:59.000Z

288

Optimization of central receiver concentrated solar thermal : site selection, heliostat layout & canting .  

E-Print Network [OSTI]

??In this thesis, two new models are introduced for the purposes of (i) locating sites in hillside terrain suitable for central receiver solar thermal plants… (more)

Noone, Corey J. (Corey James)

2011-01-01T23:59:59.000Z

289

Ris Energy Report 5 Solar thermal 41 by the end of 2004 about 110 million m2  

E-Print Network [OSTI]

Risø Energy Report 5 Solar thermal 41 6.3.2 by the end of 2004 about 110 million m2 of solar ther be within the competence of the existing solar thermal industry. Solar thermal PETER AHM, PA ENERgy LTD- mal collectors were installed worldwide. Figure 24 il- lustrates the energy contribution from

290

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

with Sensible- Heat Storage Solar Power Plant with Sulfurof the Solar Power Plant Storage-Vessel Design, . . . . .System for Chemical Storage of Solar Energy. UC Berkeley,

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

291

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in Concentrating Solar Power, Customers & Partners, Energy, News, Partnership, Renewable Energy, Solar Areva Solar is collaborating with Sandia National Laboratories on a new...

292

Design and Implementation of Tracking System for Dish Solar Thermal Energy Based on Embedded System  

Science Journals Connector (OSTI)

Solar thermal energy has lots of advantages compare with photovoltage ... and stability can’t satisfy the requirements of thermal energy system. This paper gives a design and implementation of tracking system for...

Jian Kuang; Wei Zhang

2012-01-01T23:59:59.000Z

293

Potential of thermal insulation and solar thermal energy in domestic hot water and space heating and cooling sectors in Lebanon in the period 2010 - 2030.  

E-Print Network [OSTI]

??The potential of thermal insulation and solar thermal energy in domestic water heating, space heating and cooling in residential and commercial buildings Lebanon is studied… (more)

Zaatari, Z.A.R.

2012-01-01T23:59:59.000Z

294

21 - Thermal energy storage systems for concentrating solar power (CSP) technology  

Science Journals Connector (OSTI)

Abstract The option to supply electricity on demand is a key advantage of solar thermal power plants with integrated thermal storage. Diurnal storage systems providing thermal power in the multi-MW range for several hours are required here, the temperature range being between 250 °C and 700 °C. This chapter describes the state of the art in commercial storage systems used in solar thermal power generation. An overview of alternative and innovative storage concepts for this application area is given.

W.-D. Steinmann

2015-01-01T23:59:59.000Z

295

Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion Center (S3TEC)  

Broader source: Energy.gov [DOE]

Introduction to the solid-state solar-thermal energy conversion center plus discussion on phonon transport and solar thermoelectric energy conversion

296

Simulation and experimental study on honeycomb-ceramic thermal energy storage for solar thermal systems  

Science Journals Connector (OSTI)

Abstract A honeycomb-ceramic thermal energy storage (TES) was proposed for thermal utilization of concentrating solar energy. A numerical model was developed to simulate the thermal performances, and TES experiments were carried out to demonstrate and improve the model. The outlet temperature difference between simulation and experimental results was within 5% at the end of a charging period, indicating the simulation model was reasonable. The simulation model was applied to predict the effects of geometric, thermo-physical parameters and flow fluxes on TES performances. The temperature dropped more quickly and decreased to a lower temperature in discharging period when the conductivity was smaller. The storage capacity increased with the growth of volumetric heat capacity. As to a TES with big channels and thin walls, the outlet temperature increased quickly and greatly in a charging process and dropped sharply in a discharging process.

Zhongyang Luo; Cheng Wang; Gang Xiao; Mingjiang Ni; Kefa Cen

2014-01-01T23:59:59.000Z

297

Advanced Organic Vapor Cycles for Improving Thermal Conversion Efficiency in Renewable Energy Systems  

E-Print Network [OSTI]

Closed- Brayton-Cycle Solar Power Towers," ASME Journal ofNaF-NaBF4) cooled solar power tower plant is presented;high temperature solar power tower designs to date.

Ho, Tony

2012-01-01T23:59:59.000Z

298

Design and global optimization of high-efficiency solar thermal systems  

E-Print Network [OSTI]

, Massachusetts 02139, USA bermel@mit.edu Abstract: Solar thermal, thermoelectric, and thermophotovoltaic (TPVDesign and global optimization of high-efficiency solar thermal systems with tungsten cermets DavidDepartment of Physics, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts

Soljaèiæ, Marin

299

Rapid Solar-thermal Dissociation of Natural Gas in an Aerosol Flow Reactor  

E-Print Network [OSTI]

/or hydrogen powered fuel cell vehicles could help to mitigate the energy supply and environmental problems black production. For solar-thermal processing, where carbon black is sold, fossil energy usageRapid Solar-thermal Dissociation of Natural Gas in an Aerosol Flow Reactor Jaimee Dahl a , Karen

300

Solar thermal power generation: a bibliography with abstracts. Quarterly update, July-September 1979  

SciTech Connect (OSTI)

This annotated bibliography covers the following subjects: energy overviews, solar overviews, energy conservation, economics and law, solar thermal power, thermionic and thermoelectric, ocean thermal energy conversion, wind power, biomass and photochemical energy, and large scale photovoltaics. An author index and a keyword index are included. (MHR)

Not Available

1980-02-01T23:59:59.000Z

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


301

Solar thermal power generation: a bibliography with abstracts. Quarterly update, April-June 1980  

SciTech Connect (OSTI)

This annotated bibliography covers the following subjects: energy overviews; solar overviews; energy conservation; environment, law, and policy; total energy systems; solar thermal power and energy storage; thermoelectric, thermionic, and thermolysis; Ocean Thermal Energy Conversion; wind energy; biomass; bioconversion, and photochemical; satellite power systems; and photovoltaic applications. (MHR)

Sparkman, T.; Bozman, W.R. (eds.)

1980-08-01T23:59:59.000Z

302

Solar thermal power generation: a bibliography with abstracts. Quarterly update, January-March 1980  

SciTech Connect (OSTI)

This annotated bibliography contains the following: energy overviews, solar overviews, energy conservation, economics and law, total energy systems, solar thermal power, thermionic and thermoelectric, ocean thermal energy conversion, wind power, biomass and photochemical energy, satellite power stations, and large-scale photovoltaics. (MHR)

Not Available

1980-06-01T23:59:59.000Z

303

The Thermal Control of the New Solar Telescope at Big Bear Observatory  

E-Print Network [OSTI]

The Thermal Control of the New Solar Telescope at Big Bear Observatory Angelo P. Verdonia and Carsten Denkera aNew Jersey Institute of Technology, Center for Solar-Terrestrial Research, 323 Martin Luther King Blvd, Newark, NJ 07102, US ABSTRACT We present the basic design of the THermal Control System

304

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

summer heat as by solar ponds or "heating towers"; some goodsolar cooking (third world) Relieve firewood depletion Year-round exploitation No cooling towers

Authors, Various

2011-01-01T23:59:59.000Z

305

Modeling Total Solar Irradiance Variations Using Automated Classification Software on Mount Wilson Data  

E-Print Network [OSTI]

taken with the 150-foot solar tower at MWO which has been inthose from the 150-foot solar tower synoptic program without

Ulrich, R. K.; Parker, D.; Bertello, L.; Boyden, J.

2010-01-01T23:59:59.000Z

306

Integrating Solar Thermal and Photovoltaic Systems in Whole Building Energy Simulation  

E-Print Network [OSTI]

INTEGRATING SOLAR THERMAL AND PHOTOVOLTAIC SYSTEMS IN WHOLE BUILDING ENERGY SIMULATION Soolyeon Cho1 and Jeff S. Haberl2 1The Catholic University of America, Washington, DC 2Texas A&M University, College Station, TX ABSTRACT... This paper introduces methodologies on how the renewable energy generated by the solar thermal and solar photovoltaic (PV) systems installed on site can be integrated in the whole building simulation analyses, which then can be available to analyze...

Cho, S.; Haberl, J.

307

Sustainable solar thermal power generation (STPG) technologies in Indian context  

SciTech Connect (OSTI)

India is a fast developing country. Some of the factors like population growth, industrialization, liberalization in economic policies, green revolution and awareness toward the environment, are increasing the electricity demand rapidly. As per the 14th Power Survey Report, an energy deficit of (+) 9% and peak demand deficit of (+) 18% have been estimated. Keeping in view the liberalization in economic policies, this deficit may be higher by the year 2000 AD. An estimation indicates that India is blessed with solar energy to the tune of 5 x 10{sup 15} kWh/yr. Being clean and inexhaustible source of energy, it can be used for large-scale power generation in the country. Keeping in view the present state-of-art technologies for STPG in MW range, best possible efforts are required to be made by all the concerned, to develop sustainable STPG technology of the future, specially for tropical regions. Standardization of vital equipment is an important aspect. There are a few required criteria like simple and robust technology, its transfer and adaptation in tropical climate conditions; high plant load factor without fossil-fired backup; availability of plant during evening peak and night hours; least use of fragile components, and capacity optimization for MW plants as per solar irradiance and environmental factors. In this paper, efforts have been made to compare the different STPG technologies. On the basis, of literature surveyed and studies carried out by the author, it may be stated that Central Receiver System technologies using molten salt and volumetric air receiver, along with molten salt and ceramic thermal storage respectively seems to be suitable and comparable in Indian context. Performance of SOLAR-TWO and PHOEBUS plants may be decisive.

Sharma, R.S. [Ministry of Non-Conventional Energy Sources, New Delhi (India). Solar Energy Centre

1996-12-31T23:59:59.000Z

308

Software-as-a-Service Optimised Scheduling of a Solar-Assisted HVAC System with Thermal Storage  

E-Print Network [OSTI]

solar energy available would result in overcharging of the hot storage.of a solar-assisted HVAC system with thermal storage. Energystorage and solar- assisted HVAC for the purpose of optimizing its energy

Mammoli, Andrea

2014-01-01T23:59:59.000Z

309

Application of thermal treatment procedure for concrete with the help of solar energy to construction engineering practice  

Science Journals Connector (OSTI)

The experience of solar energy usage for concreting with the help of different solar radiation devices in Russian regions and in ... reported. Information about the cost efficiency of solar energy usage for thermal

N. I. Podgornov; D. D. Koroteev

2007-10-01T23:59:59.000Z

310

Improving Solar Dryers’ Performances Using Design and Thermal Heat Storage  

Science Journals Connector (OSTI)

Solar drying is one of the most important ... , at the same time as using free solar energy permits to reduce the cost of ... face or to limit the intermittent character of solar energy, storage is proposed as a ...

Lyes Bennamoun

2013-12-01T23:59:59.000Z

311

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

provide solar power plant energy storage for a reasonablefor Chemical Storage of Solar Energy. UC Berkeley, M.S.for a solar power plant without energy storage for nighttime

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

312

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

Power Plant Solar Power Ideal Gas Turbine Topping Braytonefficiency of a solar power plant with gas-turbine toppingfor a solar power plant with Brayton-cycle gas turbine

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

313

Solar Updraft TowersSolar Updraft Towers Presentation 5  

E-Print Network [OSTI]

to drive large turbines to generate electricity (basic engine). #12;Two Primary FactorsTwo Primary Factors gastraditional forms of natural gas energy production #12;Social & Economical BenefitsSocial & Economical of initial capital Efficiency & Production Cost Cost/kWh is higher than traditional forms of natural

Prevedouros, Panos D.

314

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

Power Plant Solar Power Ideal Gas Turbine Topping Braytonwill require higher parasitic power for gas circulation. Theefficiency of a solar power plant with gas-turbine topping

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

315

Sandia National Laboratories: National Solar Thermal Test Facility...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Plant Reliability Workshop Sandia Wind Energy in the News Wind & Water Power Newsletter Solar Energy Solar Newsletter Photovoltaics Advanced Research & Development Microsystems...

316

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Salt Initial Flow Testing is a Tremendous Success On November 2, 2012, in Concentrating Solar Power, News, Renewable Energy, Solar The Molten Salt Test Loop (MSTL ) system at...

317

Experimental investigation of an innovative thermochemical process operating with a hydrate salt and moist air for thermal storage of solar  

E-Print Network [OSTI]

and moist air for thermal storage of solar energy: global performance Benoit Michela, *, Nathalie Mazeta-gas reaction, hydration, thermal storage, seasonal storage, solar energy * Corresponding author: E-mail: mazet in solar energy. Solar energy is widely affordable and has the capability to meet household demand over

Paris-Sud XI, Université de

318

Quality assurance with the ISFH-Input/Output-Procedure 6-year-experience with 14 solar thermal systems  

E-Print Network [OSTI]

sensors into a solar system with buffer storage tank and direct discharging. Figure 1 shows the sensorsQuality assurance with the ISFH-Input/Output-Procedure 6-year-experience with 14 solar thermal of standard solar thermal systems usually don't recognise failures affecting the solar yield, because

319

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

ADVANCED THERMAL ENERGY STORAGE CONCEPT DEFINITION STUDY FORSchilling. F. E. , Thermal Energy Storage Using PrestressedNo ~cumulate thermal energy storage. Estimate ESTrof2(

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

320

Design of a 2.5kW Low Temperature Stirling Engine for Distributed Solar Thermal Generation  

E-Print Network [OSTI]

Design of a 2.5kW Low Temperature Stirling Engine for Distributed Solar Thermal Generation Mike He on the design of a Stirling engine for distributed solar thermal ap- plications. In particular, we design renewable energy applications. A key advantage of a solar thermal system is that they can incorporate

Sanders, Seth

Note: This page contains sample records for the topic "tower solar thermal" 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.


321

Green Energy Ohio - GEO Solar Thermal Rebate Program | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Ohio - GEO Solar Thermal Rebate Program Ohio - GEO Solar Thermal Rebate Program Green Energy Ohio - GEO Solar Thermal Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Program Info Start Date 04/01/2009 State Ohio Program Type Non-Profit Rebate Program Provider Green Energy Ohio With funding from The Sierra Club, Green Energy Ohio (GEO) is offering rebates on residential properties in Ohio for solar water heating systems purchased after April 1, 2009. The rebates are based on the projected energy output from the solar collectors and are calculated at $30 per kBtu/day (based on SRCC rating for "Clear Day/C Interval"). The maximum amount is $2,400 per applicant. There are two parts to the application. PART I of the application collects

322

Oscillating Magnetic Trap and Non-Thermal Emission from Solar Flares  

Science Journals Connector (OSTI)

......connected with the electron thermal conductivity and ion viscosity...1, ed. Galeev A. A., Sudan R. N. (North-Holland Physics...Oscillating Magnetic Trap and Non-Thermal Emission from Solar Flares...scattering of trapped non-thermal electrons (Aschwanden et al......

Yuri Tsap; Yulia Kopylova; Tatiana Goldvarg; Alexander Stepanov

2013-12-05T23:59:59.000Z

323

New Directions in Low Temperature Solar Thermal Storage  

Science Journals Connector (OSTI)

Comprehensive overviews of energy storage techhologies for solar applications are already available [1,2,3...

C. J. Swet

1987-01-01T23:59:59.000Z

324

Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller  

E-Print Network [OSTI]

solar thermal technologies. ..Advances in solar thermal electricity technology”. Solar107 1. Introduction Solar thermal technologies have been

Poiry, Heather Marie

2011-01-01T23:59:59.000Z

325

Collisional Thermalization of Hydrogen and Helium in Solar Wind Plasma  

E-Print Network [OSTI]

In situ observations of the solar wind frequently show the temperature of $\\alpha$-particles (fully ionized helium), $T_\\alpha$, to significantly differ from that of protons (ionized hydrogen), $T_p$. Many heating processes in the plasma act preferentially on $\\alpha$-particles, even as collisions among ions act to gradually establish thermal equilibrium. Measurements from the $\\textit{Wind}$ spacecraft's Faraday cups reveal that, at $r=1.0\\ \\textrm{AU}$ from the Sun, the observed values of the $\\alpha$-proton temperature ratio, $\\theta_{\\alpha p} \\equiv T_\\alpha\\,/\\,T_p$ has a complex, bimodal distribution. This study applied a simple model for the radial evolution of $\\theta_{\\alpha p}$ to these data to compute expected values of $\\theta_{\\alpha p}$ at $r=0.1\\ \\textrm{AU}$. These inferred $\\theta_{\\alpha p}$-values have no trace of the bimodality seen in the $\\theta_{\\alpha p}$-values measured at $r=1.0\\ \\textrm{AU}$ but are instead consistent with the actions of the known mechanisms for $\\alpha$-particle p...

Maruca, Bennett A; Sorriso-Valvo, Luca; Kasper, Justin C; Stevens, Michael L

2013-01-01T23:59:59.000Z

326

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

327

Research and Development for Novel Thermal Energy Storage Systems (TES) for Concentrating Solar Power (CSP)  

SciTech Connect (OSTI)

The overall objective was to develop innovative heat transfer devices and methodologies for novel thermal energy storage systems for concentrating solar power generation involving phase change materials (PCMs). Specific objectives included embedding thermosyphons and/or heat pipes (TS/HPs) within appropriate phase change materials to significantly reduce thermal resistances within the thermal energy storage system of a large-scale concentrating solar power plant and, in turn, improve performance of the plant. Experimental, system level and detailed comprehensive modeling approaches were taken to investigate the effect of adding TS/HPs on the performance of latent heat thermal energy storage (LHTES) systems.

Faghri, Amir; Bergman, Theodore L; Pitchumani, Ranga

2013-09-26T23:59:59.000Z

328

Indian Solar Thermal Technology – Technology to Protect Environment and Ecology  

Science Journals Connector (OSTI)

Rising fuel costs and global warming are pushing the development of renewable energy supplies. Solar energy is most promising as unlike wind ... and more predictable. 1 % of the solar energy received on earth wou...

Deepak Gadhia

2011-01-01T23:59:59.000Z

329

Thermal History of Planetary Materials in the Solar Nebula  

Science Journals Connector (OSTI)

The current bulk composition of planets has been cast in some extent during the early history of the solar system, associated with the formation and evolution of the solar nebula. Particularly, this stage regu...

T. V. Ruzmaikina

1995-01-01T23:59:59.000Z

330

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and systems ... Solar Furnace On November 10, 2010, in A solar furnace uses a heliostat that tracks the sun to direct sunlight onto a mirrored parabolic dish. Because the...

331

Thermoelectrics Combined with Solar Concentration for Electrical and Thermal Cogeneration  

E-Print Network [OSTI]

Since the ceramic wafers have a high thermal conductivity,easily altered ceramic blocks all had a thermal conductivityCeramics. Available Online: http://www.dynacer.com/thermal_

Jackson, Philip Robert

2012-01-01T23:59:59.000Z

332

Analyzing the efficiency of a photovoltaic-thermal solar collector based on heat pipes  

Science Journals Connector (OSTI)

The structure of a photovoltaic/thermal solar collector based on aluminum heat pipes and ... , along with the results from analyzing its efficiency. Its optimum mode of operation is shown...

S. M. Khairnasov

2014-01-01T23:59:59.000Z

333

Analysis of a solar dish–Stirling system with hybridization and thermal storage  

Science Journals Connector (OSTI)

A high potential of thermosolar power generation systems is the use of thermal storage and/or hybridization to overcome dependability of solar resource availability. The incorporation of these technologies ... on...

Carlos Monné; Yolanda Bravo…

2014-07-01T23:59:59.000Z

334

Indirect estimation of energy disposition by non-thermal electrons in solar flares  

Science Journals Connector (OSTI)

The broad-band EUV and microwave fluxes correlate strongly with hard X-ray fluxes in the impulsive phase of a solar flare. This note presents numerical aids for the estimation of the non-thermal electron fluxe...

H. S. Hudson; R. C. Canfield; S. R. Kane

1978-11-01T23:59:59.000Z

335

Solar Thermal Energy Use in EU-27 Countries: Evolution and Promotion  

Science Journals Connector (OSTI)

Growth in the use of renewable energies in the 27 European Union (EU-27 ... past decade has been remarkable. Among these energies is solar thermal energy (STE). The average annual growth rate ... has reached almo...

María P. del Pablo-Romero; Antonio Sánchez-Braza; Enrique Lerma

2013-01-01T23:59:59.000Z

336

Electrodeposition and characterization of nanostructured black nickel selective absorber coatings for solar–thermal energy conversion  

Science Journals Connector (OSTI)

Selective coatings consisting of a bright nickel interlayer and black nickel overlayer for solar-to-thermal energy conversion have been electrodeposited onto stainless steel...2, NiOOH, Ni2O3..., NiO, water and m...

F. I. Lizama-Tzec; J. D. Macías…

2014-08-01T23:59:59.000Z

337

Multi-objective genetic algorithm for the optimization of a flat-plate solar thermal collector  

Science Journals Connector (OSTI)

We present a multi-objective genetic algorithm we developed for the optimization of a flat-plate solar thermal collector. This collector consists of a waffle-shaped Al substrate with...

Mayer, Alexandre; Gaouyat, Lucie; Nicolay, Delphine; Carletti, Timoteo; Deparis, Olivier

2014-01-01T23:59:59.000Z

338

Development of a Solar-Thermal ZnO/Zn Water-Splitting Thermochemical...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Development of a Solar-thermal ZnOZn Water-splitting Thermochemical Cycle Final Report (DE-PS36-03GO93007 - Subcontract RF-05-SHGR-006) Alan W. Weimer (PI), Christopher Perkins,...

339

Thermal Solar Energy Systems for Space Heating of Buildings  

E-Print Network [OSTI]

to compensate the deficit. In this case a traditional solar heating system having the same characteristics with regard to the solar collecting area and the volume of storage tank is used. It can be concluded that the space heating system using a solar energy...

Gomri, R.; Boulkamh, M.

2010-01-01T23:59:59.000Z

340

Performance comparison of thermal energy storage oils for solar cookers during charging  

Science Journals Connector (OSTI)

Abstract Charging experiments to evaluate the thermal performance of three thermal energy storage oils for solar cookers are presented. An experimental setup using an insulated 20 L storage tank is used to perform the experiments. The three thermal oils evaluated are Sunflower Oil, Shell Thermia C and Shell Thermia B. Energy and exergy based thermal performance parameters are evaluated. A new parameter, the exergy factor, is proposed which evaluates the ratio of the exergy content to the energy content. Sunflower Oil performs better than the other thermal oils under high power charging. Thermal performances of the oils are comparable under low power charging.

Ashmore Mawire; Abigail Phori; Simeon Taole

2014-01-01T23:59:59.000Z

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


341

Vice President CEO, Tower Foundation  

E-Print Network [OSTI]

Vice President CEO, Tower Foundation Administrative Assistant to the AVP Information Representative Tower Foundation Charitable Gifts Officer Gift Analyst Gift Analyst Gift Analyst Senior Analyst Tower Foundation Stewardship Director Graphic Designer Administrative Assistant Web Communications

Su, Xiao

342

OLADE-Solar Thermal World Portal | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » OLADE-Solar Thermal World Portal Jump to: navigation, search Tool Summary Name: OLADE-Solar Thermal World Portal Agency/Company /Organization: Latin American Energy Organization (OLADE) Sector: Energy Focus Area: Renewable Energy, Solar, - Concentrating Solar Power, - Solar Hot Water User Interface: Website Website: www.solarthermalworld.org/ Cost: Free UN Region: Caribbean, South America Language: "English, Spanish; Castilian" is not in the list of possible values (Abkhazian, Achinese, Acoli, Adangme, Adyghe; Adygei, Afar, Afrihili, Afrikaans, Afro-Asiatic languages, Ainu, Akan, Akkadian, Albanian, Aleut, Algonquian languages, Altaic languages, Amharic, Angika, Apache languages, Arabic, Aragonese, Arapaho, Arawak, Armenian, Aromanian; Arumanian; Macedo-Romanian, Artificial languages, Assamese, Asturian; Bable; Leonese; Asturleonese, Athapascan languages, Australian languages, Austronesian languages, Avaric, Avestan, Awadhi, Aymara, Azerbaijani, Balinese, Baltic languages, Baluchi, Bambara, Bamileke languages, Banda languages, Bantu (Other), Basa, Bashkir, Basque, Batak languages, Beja; Bedawiyet, Belarusian, Bemba, Bengali, Berber languages, Bhojpuri, Bihari languages, Bikol, Bini; Edo, Bislama, Blin; Bilin, Blissymbols; Blissymbolics; Bliss, Bosnian, Braj, Breton, Buginese, Bulgarian, Buriat, Burmese, Caddo, Catalan; Valencian, Caucasian languages, Cebuano, Celtic languages, Central American Indian languages, Central Khmer, Chagatai, Chamic languages, Chamorro, Chechen, Cherokee, Cheyenne, Chibcha, Chichewa; Chewa; Nyanja, Chinese, Chinook jargon, Chipewyan; Dene Suline, Choctaw, Chuukese, Chuvash, Classical Newari; Old Newari; Classical Nepal Bhasa, Classical Syriac, Coptic, Cornish, Corsican, Cree, Creek, Creoles and pidgins , Crimean Tatar; Crimean Turkish, Croatian, Cushitic languages, Czech, Dakota, Danish, Dargwa, Delaware, Dinka, Divehi; Dhivehi; Maldivian, Dogri, Dogrib, Dravidian languages, Duala, Dutch; Flemish, Dyula, Dzongkha, Eastern Frisian, Efik, Egyptian (Ancient), Ekajuk, Elamite, English, Erzya, Esperanto, Estonian, Ewe, Ewondo, Fang, Fanti, Faroese, Fijian, Filipino; Pilipino, Finnish, Finno-Ugrian languages, Fon, French, Friulian, Fulah, Ga, Gaelic; Scottish Gaelic, Galibi Carib, Galician, Ganda, Gayo, Gbaya, Geez, Georgian, German, Germanic languages, Gilbertese, Gondi, Gorontalo, Gothic, Grebo, Greek, Modern, Guarani, Gujarati, Gwich'in, Haida, Haitian; Haitian Creole, Hausa, Hawaiian, Hebrew, Herero, Hiligaynon, Himachali languages; Western Pahari languages, Hindi, Hiri Motu, Hittite, Hmong; Mong, Hungarian, Hupa, Iban, Icelandic, Ido, Igbo, Ijo languages, Iloko, Inari Sami, Indic languages, Indo-European languages, Indonesian, Ingush, Interlingue; Occidental, Inuktitut, Inupiaq, Iranian languages, Irish, Iroquoian languages, Italian, Japanese, Javanese, Judeo-Arabic, Judeo-Persian, Kabardian, Kabyle, Kachin; Jingpho, Kalaallisut; Greenlandic, Kalmyk; Oirat, Kamba, Kannada, Kanuri, Kara-Kalpak, Karachay-Balkar, Karelian, Karen languages, Kashmiri, Kashubian, Kawi, Kazakh, Khasi, Khoisan languages, Khotanese; Sakan, Kikuyu; Gikuyu, Kimbundu, Kinyarwanda, Kirghiz; Kyrgyz, Klingon; tlhIngan-Hol, Komi, Kongo, Konkani, Korean, Kosraean, Kpelle, Kru languages, Kuanyama; Kwanyama, Kumyk, Kurdish, Kurukh, Kutenai, Ladino, Lahnda, Lamba, Land Dayak languages, Lao, Latin, Latvian, Lezghian, Limburgan; Limburger; Limburgish, Lingala, Lithuanian, Lojban, Lower Sorbian, Lozi, Luba-Katanga, Luba-Lulua, Luiseno, Lule Sami, Lunda, Luo (Kenya and Tanzania), Lushai, Luxembourgish; Letzeburgesch, Macedonian, Madurese, Magahi, Maithili, Makasar, Malagasy, Malay, Malayalam, Maltese, Manchu, Mandar, Mandingo, Manipuri, Manobo languages, Manx, Maori, Mapudungun; Mapuche, Marathi, Mari, Marshallese, Marwari, Masai, Mayan languages, Mende, Mi'kmaq; Micmac, Minangkabau, Mirandese, Mohawk, Moksha, Mon-Khmer languages, Mongo, Mongolian, Mossi, Multiple languages, Munda languages, N'Ko, Nahuatl languages, Nauru, Navajo; Navaho, Ndebele, North; North Ndebele, Ndebele, South; South Ndebele, Ndonga, Neapolitan, Nepal Bhasa; Newari, Nepali, Nias, Niger-Kordofanian languages, Nilo-Saharan languages, Niuean, North American Indian languages, Northern Frisian, Northern Sami, Norwegian, Nubian languages, Nyamwezi, Nyankole, Nyoro, Nzima, Occitan (post 1500); Proven√ßal, Ojibwa, Oriya, Oromo, Osage, Ossetian; Ossetic, Otomian languages, Pahlavi, Palauan, Pali, Pampanga; Kapampangan, Pangasinan, Panjabi; Punjabi, Papiamento, Papuan languages, Pedi; Sepedi; Northern Sotho, Persian, Philippine languages, Phoenician, Pohnpeian, Polish, Portuguese, Prakrit languages, Pushto; Pashto, Quechua, Rajasthani, Rapanui, Rarotongan; Cook Islands Maori, Romance languages, Romanian; Moldavian; Moldovan, Romansh, Romany, Rundi, Russian, Salishan languages, Samaritan Aramaic, Sami languages, Samoan, Sandawe, Sango, Sanskrit, Santali, Sardinian, Sasak, Scots, Selkup, Semitic languages, Serbian, Serer, Shan, Shona, Sichuan Yi; Nuosu, Sicilian, Sidamo, Sign Languages, Siksika, Sindhi, Sinhala; Sinhalese, Sino-Tibetan languages, Siouan languages, Skolt Sami, Slave (Athapascan), Slavic languages, Slovak, Slovenian, Sogdian, Somali, Songhai languages, Soninke, Sorbian languages, Sotho, Southern, South American Indian (Other), Southern Altai, Southern Sami, Spanish; Castilian, Sranan Tongo, Sukuma, Sumerian, Sundanese, Susu, Swahili, Swati, Swedish, Swiss German; Alemannic; Alsatian, Syriac, Tagalog, Tahitian, Tai languages, Tajik, Tamashek, Tamil, Tatar, Telugu, Tereno, Tetum, Thai, Tibetan, Tigre, Tigrinya, Timne, Tiv, Tlingit, Tok Pisin, Tokelau, Tonga (Nyasa), Tonga (Tonga Islands), Tsimshian, Tsonga, Tswana, Tumbuka, Tupi languages, Turkish, Turkmen, Tuvalu, Tuvinian, Twi, Udmurt, Ugaritic, Uighur; Uyghur, Ukrainian, Umbundu, Uncoded languages, Undetermined, Upper Sorbian, Urdu, Uzbek, Vai, Venda, Vietnamese, Volap√ºk, Votic, Wakashan languages, Walamo, Walloon, Waray, Washo, Welsh, Western Frisian, Wolof, Xhosa, Yakut, Yao, Yapese, Yiddish, Yoruba, Yupik languages, Zande languages, Zapotec, Zaza; Dimili; Dimli; Kirdki; Kirmanjki; Zazaki, Zenaga, Zhuang; Chuang, Zulu, Zuni) for this property.

343

A dynamic thermal performance model for flat-plate solar collectors based on the thermal inertia correction of the steady-state test method  

Science Journals Connector (OSTI)

Abstract In determining the dynamic thermal performance of a flat-plate solar collector, when the instantaneous solar irradiance changes sharply at one moment, most of the existing models cannot accurately predict the momentary thermal characteristics of outlet temperature and useful heat gain. In the present study, an analytical model in the form of series expansion is put forward to depict the momentary thermal characteristics of flat-plate solar collectors. The analytical model reveals that, instantaneous useful heat gain of a solar collector at one moment consists of the steady-state useful heat gain and corresponding thermal inertia correction. The model is then validated by the experimental data. It indicates that the analytical model can properly predict the dynamic thermal performance of the solar air collector. Besides, the model pertains to other types of solar thermal collectors, if they can be tested by the steady-state test method.

Jie Deng; Yupeng Xu; Xudong Yang

2015-01-01T23:59:59.000Z

344

Pressure drops for direct steam generation in line-focus solar thermal systems  

E-Print Network [OSTI]

the focus of the solar collector, and then generate steam outside the collector in a large heat exchanger applicable to DSG in long horizontal pipes as required for the current work with a line-focus collector. #12Pressure drops for direct steam generation in line-focus solar thermal systems John Pye1 , Graham

345

Biomass Gasification using Solar Thermal Energy M. Munzinger and K. Lovegrove  

E-Print Network [OSTI]

.lovegrove@anu.edu.au Hydrogen from Biomass as an energy carrier has generated increasing interest in recent years in connection with the use of solar heat as energy source for the conversion reaction. Biomass gasification effective as high energy density transport fuels. Gas derived from solar thermal conversion of biomass

346

Unglazed transpired solar collector having a low thermal-conductance absorber  

DOE Patents [OSTI]

An unglazed transpired solar collector using solar radiation to heat incoming air for distribution, comprises an unglazed absorber formed of low thermal-conductance material having a front surface for receiving the solar radiation and openings in the unglazed absorber for passage of the incoming air such that the incoming air is heated as it passes towards the front surface of the absorber and the heated air passes through the openings in the absorber for distribution. 3 figs.

Christensen, C.B.; Kutscher, C.F.; Gawlik, K.M.

1997-12-02T23:59:59.000Z

347

Unglazed transpired solar collector having a low thermal-conductance absorber  

DOE Patents [OSTI]

An unglazed transpired solar collector using solar radiation to heat incoming air for distribution, comprising an unglazed absorber formed of low thermal-conductance material having a front surface for receiving the solar radiation and openings in the unglazed absorber for passage of the incoming air such that the incoming air is heated as it passes towards the front surface of the absorber and the heated air passes through the openings in the absorber for distribution.

Christensen, Craig B. (Boulder, CO); Kutscher, Charles F. (Golden, CO); Gawlik, Keith M. (Boulder, CO)

1997-01-01T23:59:59.000Z

348

Tax Revenue and Job Benefits from Solar Thermal Power Plants in Nye County  

SciTech Connect (OSTI)

The objective of this report is to establish a common understanding of the financial benefits that the County will receive as solar thermal power plants are developed in Amargosa Valley. Portions of the tax data and job estimates in the report were provided by developers Solar Millennium and Abengoa Solar in support of the effort. It is hoped that the resulting presented data will be accepted as factual reference points for the ensuing debates and financial decisions concerning these development projects.

Kuver, Walt

2009-11-10T23:59:59.000Z

349

Thermal and Hydraulic Design of a Solar Collector Field for a Primary School Pool  

Science Journals Connector (OSTI)

Abstract The methodology and results of the thermal and hydraulic design for a solar heating field of an elementary school's semi-olympic pool is presented. Improved flat solar collectors with copper tube and aluminum fins were used. From own experiences, many Mexican solar fields do not operate correctly because of their poor flow balance (irrigation), may be due to lack of attention given to this aspect. That's why the research of this work focuses on studying the behavior of the pressure drop in a hydraulic arrangement, particularly of this facility, in which all collector batteries are connected in parallel. Previously two solar collectors were sent to a specialized laboratory for certification tests, obtaining the optimum water flow value for maximum thermal efficiency. The results show an optimum range between 4 and 11 L/min. On the other hand, the development of a thermal model based on a temporal energy balance, allowed us to determine that the optimum solar heating area is around 338 m2, using 195 flat-coated solar collectors, with copper tube and aluminum fin. For this heating system a water volume/solar collection area relation, called REVA, of 1.45m3/m2 was obtained. Referred to the hydraulic design and using the program EPANET 2.0 it was found that in the proposed arrangement, 192 solar collectors were irrigated with the optimal range and only 2 solar collectors were below the lower range at 3 L/min.

Rubén Dorantes; Georgina García; Carlos Salazar; Heber Oviedo; Humberto González; Raúl Alanis; Edgar Salazar; Ignacio R. Martín-Dominguez

2014-01-01T23:59:59.000Z

350

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

OF CALIFORNIA RIVERSIDE Phase Change Materials for ThermalOF THE THESIS Phase Change Materials for Thermal Energyto utilize phase change materials (PCM’s) to enhance thermal

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

351

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

PHASE CHANGE THERMAL ENERGY STORAGE FOR CONCENTRATING SOLARChange Materials for Thermal Energy Storage in ConcentratedChange Materials for Thermal Energy Storage in Concentrated

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

352

Control of thermal emittance of stainless steel using sputtered tungsten thin films for solar thermal power applications  

Science Journals Connector (OSTI)

Abstract Low thermal emittance is the key factor of a solar collector. For high temperature solar thermal applications, low emittance is an important parameter, because the thermal radiative losses of the absorbers increase proportionally by T4. Our primary motivation for carrying out this work has been to lower the thermal emittance of stainless steel substrate (intrinsic emittance=0.12–0.13) by coating a thin film of high infrared (IR) reflecting tungsten (W). Tungsten thin films were deposited on stainless steel substrates using a glow discharge direct current magnetron sputtering system. Emittance as low as 0.03 was obtained by varying the thickness of W coating on stainless steel substrate. The influences of structural, morphological and electrical properties of the W coating on its emittance values are studied. The effect of substrate roughness on the emittance of W coating is also examined. Thermal stability of the W coatings is studied in both vacuum and air. In order to demonstrate the effect of W interlayer, solar selective coating of AlTiN/AlTiON/AlTiO tandem absorber was deposited on W coated stainless steel substrates, which exhibited absorptance of 0.955 and emittance of 0.08 with a thermal stability up to 600 °C in vacuum.

K.P. Sibin; Siju John; Harish C. Barshilia

2015-01-01T23:59:59.000Z

353

Thermal distributions in stellar plasmas, nuclear reactions and solar neutrinos  

E-Print Network [OSTI]

The physics of nuclear reactions in stellar plasma is reviewed with special emphasis on the importance of the velocity distribution of ions. Then the properties (density and temperature) of the weak-coupled solar plasma are analysed, showing that the ion velocities should deviate from the Maxwellian distribution and could be better described by a weakly-nonexstensive (|q-1|solar neutrino fluxes, and on the pp neutrino energy spectrum, and analyse the consequences for the solar neutrino problem.

M. Coraddu; G. Kaniadakis; A. Lavagno; M. Lissia; G. Mezzorani; P. Quarati

1998-11-24T23:59:59.000Z

354

Thermodynamic Analysis And Simulation Of A Solar Thermal Power System.  

E-Print Network [OSTI]

??Solar energy is a virtually inexhaustible energy resource, and thus, has great potential in helping meet many of our future energy requirements. Current technology used… (more)

Harith, Akila

2012-01-01T23:59:59.000Z

355

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Plan Webinar Wednesday, Jan. 14 Sandian Presents on PV Failure Analysis at European PV Solar Energy Conference and Exhibition (EU PVSC) EC Top Publications Design and Analysis...

356

Solar cooking : the development of a thermal battery .  

E-Print Network [OSTI]

??There are many rural area in the world where cooking fuel is very scarce. One solution to this problem is to use solar energy to… (more)

Cutting, Alexander Chatfield

2007-01-01T23:59:59.000Z

357

Research Program - Center for Solar and Thermal Energy Conversion  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

In the Inorganic PV thrust, we develop nanostructured materials architectures for solar energy conversion by engineering absorption and transport properties not available in the...

358

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

ollection subsystem uses heliostats and a central receiverhr Installed Cost of the Heliostats* - Installed Cost of thein Chapter 4. Table 2-4. Heliostats Reference Solar Power

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

359

Wind Issues in Solar Thermal Performance Ratings: Preprint  

SciTech Connect (OSTI)

We suggest that wind bias against unglazed solar water heaters be mitigated by using a calibrated collector model to derive a wind correction to the measured efficiency curve.

Burch, J.; Casey, R.

2009-04-01T23:59:59.000Z

360

Rock bed thermal storage for concentrating solar power plants.  

E-Print Network [OSTI]

??ENGLISH ABSTRACT: Concentrating solar power plants are a promising means of generating electricity. However, they are dependent on the sun as a source of energy,… (more)

Allen, Kenneth Guy

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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.


361

An Analysis of Solar Thermal Technologies Integrated into a Canadian Office Building  

Science Journals Connector (OSTI)

Abstract This paper presents an analysis of three innovative solar heating and cooling systems integrated into a typical high performance office building in Montreal, Québec, Canada. A base case energy model of the office is first created in TRNSYS and used to determine the building thermal loads and the end use energy use distribution. This model then serves as the base for the analysis of several reference cases and innovative solar systems, including solar driven absorption chiller and heat pump designs. Results highlight the importance of operating the solar system in both heating and cooling modes. A combination of a GSHP with a solar driven chiller and direct solar heating was found to achieve the highest primary energy savings, with a 76% reduction relative to a standard reference system. The highest solar fractions were obtained for a solar driven absorption heat pump, with the system achieving an annual solar fraction of 0.31 while meeting nearly the entire heating load and a significant portion of the cooling load of a typical building floor through solar energy. It was concluded that the most practical application of solar energy for this building type and climate involved using solar energy to supplement a highly efficient base mechanical system such as a heat pump. Future work will examine additional climate regions and control strategies for system operations.

Justin Tamasauskas; Martin Kegel; Roberto Sunye

2014-01-01T23:59:59.000Z

362

Aora Energy Aora Solar | Open Energy Information  

Open Energy Info (EERE)

Aora Energy Aora Solar Aora Energy Aora Solar Jump to: navigation, search Name Aora Energy (Aora Solar) Place Yavne, Israel Zip 81227 Sector Solar Product Israel-based company that has developed a tower and heliostat Solar Thermal Electricity Generation (STEG). References Aora Energy (Aora Solar)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Aora Energy (Aora Solar) is a company located in Yavne, Israel . References ↑ "Aora Energy (Aora Solar)" Retrieved from "http://en.openei.org/w/index.php?title=Aora_Energy_Aora_Solar&oldid=342218" Categories: Clean Energy Organizations Companies Organizations Stubs What links here Related changes Special pages Printable version

363

Task 39 Exhibition – Assembly of Polymeric Components for a New Generation of Solar Thermal Energy Systems  

Science Journals Connector (OSTI)

Abstract IEA SHC Task 39 is dedicated to the development, optimization and deployment of materials and designs for polymer based solar thermal systems and components. To increase the confidence in polymeric solar thermal applications, Task 39 actively supports international research activities and seeks to promote successful applications and state-of-the-art products. For the SHC conference 2013, different polymeric components suitable for domestic hot water preparation and space heating were singled out for an exhibition. Promising polymeric collectors, air collectors, thermosiphons, storage tanks and other components from industrial partners all over the world were brought to Freiburg and assembled at the Fraunhofer-Institute for Solar Energy Systems ISE. The resulting SHC Task 39 Exhibition of polymeric components shows the feasibility of all-polymeric solar thermal systems and highlights their potential, especially as scalable and modular applications for building integration or as export products to sunny regions.

Michael Koehl; Sandrin Saile; Andreas Piekarczyk; Stephan Fischer

2014-01-01T23:59:59.000Z

364

NREL: Concentrating Solar Power Research - Publications  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Publications Publications NREL develops publications, including technical reports and papers, about its R&D activities in concentrating solar power, as well as related information. Below you'll find a list of selected NREL publications concerning these activities. Also see TroughNet's publications on parabolic trough technology, and market and economic assessment. For other NREL concentrating solar power publications, you can search NREL's Publications Database. Selected Publications These publications are available as Adobe Acrobat PDFs. Utility-Scale Power Tower Solar Systems: Performance Acceptance Test Guidelines NREL Subcontract Report Author: David Kearney - Kearney & Associates Publication Date: March 2013 Simulating the Value of Concentrating Solar Power with Thermal Energy

365

A model of the thermal processing of particles in solar nebula shocks: Application to the cooling rates of chondrules  

E-Print Network [OSTI]

A model of the thermal processing of particles in solar nebula shocks: Application to the cooling for the thermal processing of particles in shock waves typical of the solar nebula. This shock model improves are accounted for in their ef fects on the mass, momentum and energy fluxes. Also, besides thermal exchange

Connolly Jr, Harold C.

366

Current and future costs for parabolic trough and power tower systems in the US market.  

SciTech Connect (OSTI)

NREL's Solar Advisor Model (SAM) is employed to estimate the current and future costs for parabolic trough and molten salt power towers in the US market. Future troughs are assumed to achieve higher field temperatures via the successful deployment of low melting-point, molten-salt heat transfer fluids by 2015-2020. Similarly, it is assumed that molten salt power towers are successfully deployed at 100MW scale over the same time period, increasing to 200MW by 2025. The levelized cost of electricity for both technologies is predicted to drop below 11 cents/kWh (assuming a 10% investment tax credit and other financial inputs outlined in the paper), making the technologies competitive in the marketplace as benchmarked by the California MPR. Both technologies can be deployed with large amounts of thermal energy storage, yielding capacity factors as high as 65% while maintaining an optimum LCOE.

Turchi, Craig (National Renewable Energy Laboratory, Golden, CO); Kolb, Gregory J.; Mehos, Mark Steven (National Renewable Energy Laboratory, Golden, CO); Ho, Clifford Kuofei

2010-08-01T23:59:59.000Z

367

Thermoelectrics Combined with Solar Concentration for Electrical and Thermal Cogeneration  

E-Print Network [OSTI]

the thermoelectric module, and the water cooling tubes. Tothermoelectric module, combined with the thermal power transferred by the water cooling

Jackson, Philip Robert

2012-01-01T23:59:59.000Z

368

Unique Challenges in the Design and Operation Philosophy of Solar Thermal Power Plants  

Science Journals Connector (OSTI)

Abstract Solar thermal power plant design and operation philosophy involves unique challenges as compared to design of conventional thermal power plants. The solar receiver operation should be able to absorb maximum solar load during transient events like daily start-up and shut-down. This requires aggressive ramp rates for transient operation of the power plant. However, the component and system level limitations must be considered in formulating these modes of operation and ramp rates. A solar receiver which usually receives heat from heliostats is designed to receive high heat flux to operate at high temperature and pressure during daytime. However, during night-time the receiver receives no heat flux and is losing heat to the environment. Day-night cyclic operation of a solar thermal power plant induces thermal cycles in the solar receiver pressure parts. Since solar receiver tubes are not insulated, the amplitude of thermal cycling is significant and needs to be addressed with proper tools and design approach. Besides, higher plant cycle efficiency requires higher operating temperature and pressure of a solar receiver, further increasing the amplitude of thermal cycling. The system level and component level response to these day-night cycles has a significant impact on modes of operation as well as on the life usage of various components. It also affects the design, specifications and operation of various plant level components. The solar thermal power plant design and operation process is optimized by having a system level thermal-hydraulics model for the solar receiver to simulate the transient start-up and shut-down events. Since all of the major components of the system are included in the model, it reflects the transient response of each of the components on each other and on the overall system. This simulation can be used to generate input conditions for component level life usage analysis. The component level life usage analysis is done using the finite-element method. The component level life usage analysis determines the permissible ramp rates. The thermal-hydraulics dynamic simulation outlines the operational philosophy of the system.

R. Terdalkar; H. Qian; G. Ye

2014-01-01T23:59:59.000Z

369

Application of solar thermal energy to buildings and industry  

SciTech Connect (OSTI)

Flat plate collectors and evacuated tube collectors are described, as are parabolic troughs, Fresnel lenses, and compound parabolic concentrators. Use of solar energy for domestic hot water and for space heating and cooling are discussed. Some useful references and methods of system design and sizing are given. This includes mention of the importance of economic analysis. The suitability of solar energy for industrial use is discussed, and solar ponds, point-focus receivers and central receivers are briefly described. The use of solar energy for process hot water, drying and dehydration, and process steam are examined, industrial process heat field tests by the Department of Energy are discussed, and a solar total energy system in Shenandoah, GA is briefly described. (LEW)

Kutscher, C. F.

1981-05-01T23:59:59.000Z

370

Solar thermal collector system modeling and testing for novel solar cooker  

E-Print Network [OSTI]

Solar cookers are aimed at reducing pollution and desertification in the developing world. However, they are often disregarded as they do not give users the ability to cook after daylight hours. The Wilson solar cooker is ...

Foley, Brian, S.B. (Brian M.). Massachusetts Institute of Technology

2014-01-01T23:59:59.000Z

371

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

372

A two dimensional thermal network model for a photovoltaic solar wall  

SciTech Connect (OSTI)

A two dimensional thermal network model is proposed to predict the temperature distribution for a section of photovoltaic solar wall installed in an outdoor room laboratory in Concordia University, Montreal, Canada. The photovoltaic solar wall is constructed with a pair of glass coated photovoltaic modules and a polystyrene filled plywood board as back panel. The active solar ventilation through a photovoltaic solar wall is achieved with an exhaust fan fixed in the outdoor room laboratory. The steady state thermal network nodal equations are developed for conjugate heat exchange and heat transport for a section of a photovoltaic solar wall. The matrix solution procedure is adopted for formulation of conductance and heat source matrices for obtaining numerical solution of one dimensional heat conduction and heat transport equations by performing two dimensional thermal network analyses. The temperature distribution is predicted by the model with measurement data obtained from the section of a photovoltaic solar wall. The effect of conduction heat flow and multi-node radiation heat exchange between composite surfaces is useful for predicting a ventilation rate through a solar ventilation system. (author)

Dehra, Himanshu [1-140 Avenue Windsor, Lachine, Quebec (Canada)

2009-11-15T23:59:59.000Z

373

Performance of a Thermally Stable Polyaromatic Hydrocarbon in a Simulated Concentrating Solar Power Loop  

SciTech Connect (OSTI)

Polyaromatic hydrocarbon thermal fluids showing thermally stability to 600 C have been tested for solar thermal-power applications. Although static thermal tests showed promising results for 1-phenylnaphthalene, loop testing at temperatures to 450 C indicated that the fluid isomerized and degraded at a slow rate. In a loop with a temperature high enough to drive the isomerization, the higher melting point byproducts tended to condense onto cooler surfaces. So, as experienced in loop operation, eventually the internal channels of cooler components in trough solar electric generating systems, such as the waste heat rejection exchanger, may become coated or clogged affecting loop performance. Thus, pure 1-phenylnaphthalene, without addition of stabilizers, does not appear to be a fluid that would have a sufficiently long lifetime (years to decades) to be used in a loop at the temperatures greater than 500 C. The performance of a concentrating solar loop using high temperature fluids was modeled based on the National Renewable Laboratory Solar Advisory Model. It was determined that a solar-to-electricity efficiency of up to 30% and a capacity factor of near 60% could be achieved using a high efficiency collector and 12 h thermal energy storage.

McFarlane, Joanna [ORNL] [ORNL; Bell, Jason R [ORNL] [ORNL; Felde, David K [ORNL] [ORNL; Joseph III, Robert Anthony [ORNL] [ORNL; Qualls, A L [ORNL] [ORNL; Weaver, Samuel P [ORNL] [ORNL

2014-01-01T23:59:59.000Z

374

Working fluid selection for an increased efficiency hybridized geothermal-solar thermal power plant in Newcastle, Utah.  

E-Print Network [OSTI]

??Renewable sources of energy are of extreme importance to reduce greenhouse gas emissions from traditional power plants. Such renewable sources include geothermal and solar thermal… (more)

Carnell, John Walter

2012-01-01T23:59:59.000Z

375

Sandia National Laboratories: National Solar Thermal Test Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

CSP Images & Videos On September 26, 2012, in Image Gallery Videos Concentrating Solar Power Image Gallery A picture says a thousand words, especially on the World Wide Web. Both...

376

Thermal Analysis of Compound—Parabolic Concentrating Solar Energy Collectors  

Science Journals Connector (OSTI)

Despite the vast attention devoted recently to the design and development of effective collectors for harnessing solar energy at medium and high temperatures (>100° ... in the design of the compound parabolic con...

B. Norton; D. E. Prapas

1987-01-01T23:59:59.000Z

377

Science Highlights- Center for Solar and Thermal Energy Conversion  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Emission in Type-II GaSbGaAs Quantum Dots and Prospects for intermediate band solar energy conversion Angular Selective Semi-Transparent Photovoltaics Mechanisms of Nanorod...

378

Effect of Solar Thermal Energy on Photoreactions’ Rate  

Science Journals Connector (OSTI)

The Shockley-Queisser limit predicts that at least 70% of solar energy is available to be converted into heat. In this paper, we show that this heating component can play a significant...

Hosseini Hashemi, Seyyed Mohammad; Choi, Jae-Woo; Psaltis, Demetri

379

10 MWe Solar Thermal Central Receiver Pilot Plant — Heliostat Evaluation  

Science Journals Connector (OSTI)

At the 10 MWe Solar Central Receiver Pilot Plant near Barstow, California, the beam characterization system (BCS) has been upgraded and a sunshape measurement system has been added. Heliostat mirror cleanliness h...

C. L. Mavis

1985-01-01T23:59:59.000Z

380

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

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


381

Efficiency Limit of Molecular Solar Thermal Energy Collecting Devices  

Science Journals Connector (OSTI)

Maximum efficiencies and potential temperature gradients are estimated using a number of basic assumptions on desired storage lifetimes and energy losses. ... Snaith, H. J.Estimating the maximum attainable efficiency in dye-sensitized solar cells Adv. ... and optical losses in the dye-sensitized system are reviewed, and the main losses in potential from the conversion of an absorbed photon at the optical bandgap of the sensitizer to the open-circuit voltage generated by the solar cell are specifically highlighted. ...

Karl Börjesson; Anders Lennartson; Kasper Moth-Poulsen

2013-04-12T23:59:59.000Z

382

EVACUATED TUBE COLLECTORS SIMPLIFY SOLAR THERMAL SYSTEM LAYOUT  

Science Journals Connector (OSTI)

SUMMARY Evacuated tube collectors (ETC's) differ quite markedly in their behaviour from the more familiar flat plate solar collectors. The consequences in cost of the entire system are investigated for a typical residential dwelling, making full use of the advantages offered by ETC's. A significant saving in initial cost as well as in maintenance costs can be realised. KEYWORDS Evacuated tube collectors; solar system layout; freeze protection; overheat protection.

C.W.J. van Koppen; P. Verhaart

1986-01-01T23:59:59.000Z

383

Research Program - Center for Solar and Thermal Energy Conversion  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

below. Organic and Hybrid Systems for TE Improving Thermoelectric Efficiency via Low Thermal Boundary Conductance Heat dissipation in Atomic-Scale Junctions A General Strategy to...

384

Thermal and economical analysis of a central solar heating system with underground seasonal storage in Turkey  

Science Journals Connector (OSTI)

Thermal performance and economic feasibility of two types of central solar heating system with seasonal storage under four climatically different Turkey locations are investigated. The effects of storage volume and collector area on the thermal performance and cost are studied for three load sizes. The simulation model of the system consisting of flat plate solar collectors, a heat pump, under ground storage tank and heating load based on a finite element analysis and finite element code ANSYS™ is chosen as a convenient tool. In this study, the lowest solar fraction value for Trabzon (41°N) and the highest solar fraction value for Adana (37°N) are obtained. Based on the economic analysis, the payback period of system is found to be about 25–35 years for Turkey.

A. Ucar; M. Inalli

2005-01-01T23:59:59.000Z

385

A review of studies on central receiver solar thermal power plants  

Science Journals Connector (OSTI)

The use of central receiver system (CRS) for electricity production promises to be one of the most viable options to replace fossil fuel power plants. Indeed, research and development activities on its basic subsystems have been booming rapidly since 1980s. This paper reviews the most important studies on the major components of central receiver solar thermal power plants including the heliostat field, the solar receiver and the power conversion system. After an overview of Concentrating Solar Power (CSP) technology, current status and applications of the \\{CRSs\\} are highlighted. Next, a detailed literature survey of existing design comprising optical, thermal and thermodynamic analysis, and techniques used to assess components have been arranged. This is followed by experimental investigations in which design concepts are established. The last section contains recent subsequent improvement of such key components as heliostat, receiver and hybrid solar gas turbine that are boosting in many R&D activities merging international collaboration during the past 30 years.

Omar Behar; Abdallah Khellaf; Kamal Mohammedi

2013-01-01T23:59:59.000Z

386

Molten Salt-Carbon Nanotube Thermal Energy Storage for Concentrating Solar Power Systems  

Office of Scientific and Technical Information (OSTI)

Molten Salt-Carbon Nanotube Thermal Energy Storage for Concentrating Solar Power Systems Molten Salt-Carbon Nanotube Thermal Energy Storage for Concentrating Solar Power Systems Final Report March 31, 2012 Michael Schuller, Frank Little, Darren Malik, Matt Betts, Qian Shao, Jun Luo, Wan Zhong, Sandhya Shankar, Ashwin Padmanaban The Space Engineering Research Center Texas Engineering Experiment Station Texas A&M University Abstract We demonstrated that adding nanoparticles to a molten salt would increase its utility as a thermal energy storage medium for a concentrating solar power system. Specifically, we demonstrated that we could increase the specific heat of nitrate and carbonate salts containing 1% or less of alumina nanoparticles. We fabricated the composite materials using both evaporative and air drying methods. We tested several thermophysical properties of the composite materials,

387

Anomalous Viscosity, Resistivity, and Thermal Diffusivity of the Solar Wind Plasma  

E-Print Network [OSTI]

In this paper we have estimated typical anomalous viscosity, resistivity, and thermal difffusivity of the solar wind plasma. Since the solar wind is collsionless plasma, we have assumed that the dissipation in the solar wind occurs at proton gyro radius through wave-particle interactions. Using this dissipation length-scale and the dissipation rates calculated using MHD turbulence phenomenology [{\\it Verma et al.}, 1995a], we estimate the viscosity and proton thermal diffusivity. The resistivity and electron's thermal diffusivity have also been estimated. We find that all our transport quantities are several orders of magnitude higher than those calculated earlier using classical transport theories of {\\it Braginskii}. In this paper we have also estimated the eddy turbulent viscosity.

Mahendra K. Verma

1995-09-05T23:59:59.000Z

388

Energy Partitions and Evolution in a Purely Thermal Solar Flare  

E-Print Network [OSTI]

This paper presents a solely thermal flare, which we detected in the microwave range from the thermal gyro- and free-free emission it produced. An advantage of analyzing thermal gyro emission is its unique ability to precisely yield the magnetic field in the radiating volume. When combined with observationally-deduced plasma density and temperature, these magnetic field measurements offer a straightforward way of tracking evolution of the magnetic and thermal energies in the flare. For the event described here, the magnetic energy density in the radio-emitting volume declines over the flare rise phase, then stays roughly constant during the extended peak phase, but recovers to the original level over the decay phase. At the stage where the magnetic energy density decreases, the thermal energy density increases; however, this increase is insufficient, by roughly an order of magnitude, to compensate for the magnetic energy decrease. When the magnetic energy release is over, the source parameters come back to ne...

Fleishman, Gregory D; Gary, Dale E

2015-01-01T23:59:59.000Z

389

Thermal performance prediction of a solar hybrid gas turbine  

Science Journals Connector (OSTI)

The present work focuses on a modelling procedure to simulate the operation of a solar hybrid gas turbine. The method is applied to a power generation system including an heliostat field, a receiver and a 36 MW commercial gas turbine. Heat is provided by concentrated solar power and integrated by fossil fuel. A detailed modelling of the gas turbine (GT) is proposed to predict the performance of commercial GT models in actual operating conditions. Advanced software tools were combined together to predict design and off-design performance of the whole system: TRNSYS® was used to model the solar field and the receiver while the gas turbine simulation was performed by means of Thermoflex®. A detailed comparison between the solarized and the conventional gas turbine is reported, taking into account GT electric power, efficiency and shaft speed. All thermodynamic parameters such pressure ratio, air flow and fuel consumption were compared. The main advantage of solarization is the fossil fuel saving, but it is balanced by a relevant penalty in power output and efficiency.

G. Barigozzi; G. Bonetti; G. Franchini; A. Perdichizzi; S. Ravelli

2012-01-01T23:59:59.000Z

390

SOLCOST - Version 3. 0. Solar energy design program for non-thermal specialists  

SciTech Connect (OSTI)

The SOLCOST solar energy design program is a public domain computerized design tool intended for use by non-thermal specialists to size solar systems with a methodology based on life cycle cost. An overview of SOLCOST capabilities and options is presented. A detailed guide to the SOLCOST input parameters is included. Sample problems showing typical imput decks and resulting SOLCOST output sheets are given. Details of different parts of the analysis are appended. (MHR)

Not Available

1980-05-01T23:59:59.000Z

391

Modeling the heating of the Green Energy Lab in Shanghai by the geothermal heat pump combined with the solar thermal energy and ground energy storage.  

E-Print Network [OSTI]

?? This work involves the study of heating systems that combine solar collectors, geothermal heat pumps and thermal energy storage in the ground. Solar collectors… (more)

Yu, Candice Yau May

2012-01-01T23:59:59.000Z

392

Thermal solar collector with VO2 absorber coating and thermochromic glazing – Temperature matching and triggering  

Science Journals Connector (OSTI)

Abstract Overheating is a common problem both with the use of active and passive solar energy in thermal solar energy systems and in highly glazed buildings, even in central European latitudes. In solar thermal collectors, the elevated temperatures occurring during stagnation result in reduced lifetime of the collector materials. They lead to water evaporation, glycol degradation and stresses in the collector with increasing vapor pressure. Special precautions are necessary to release this pressure; only mechanical solutions exist nowadays. The temperature of degradation of glycols is above 160–170 °C. However, it would be preferable to limit the temperature of the collector to approximately 100 °C, avoiding likewise the evaporation of the used water-glycol mixture. Additionally, the elevated temperatures lead to degradation of the materials that compose the collector, such as sealing, thermal insulation and the selective absorber coating. A new way of protecting solar thermal systems without any mechanical device (e.g. for shading or for pressure release) is proposed. A durable inorganic thermochromic material, which exhibits a change in optical properties at a transition temperature T t , is vanadium dioxide (VO2). At 68 °C, VO2 undergoes a reversible crystal structural phase transition accompanied by a strong variation in optical properties. Therefore, a dynamical switching of the thermal emittance ? th can be achieved by VO2. By doping the material with tungsten, it is possible to lower the transition temperature making it suitable as a glazing coating. The possibility of using the switch in emittance of the absorber coating in order to trigger the transition of a thermochromic coating on the glazing of the solar collector has been studied. An analytical approach yielded the required transition temperature of such a switching glazing. The fascinating optical properties of these switchable films elucidate the way towards novel intelligent thermal solar collector materials.

Antonio Paone; Mario Geiger; Rosendo Sanjines; Andreas Schüler

2014-01-01T23:59:59.000Z

393

Solar Power in the Desert: Are the current large-scale solar developments really improving California’s environment?  

E-Print Network [OSTI]

expectancy of a thermal solar energy development? A commontowards solar energy: Photovoltaic vs Solar Thermal. In:

Allen, Michael F.; McHughen, Alan

2011-01-01T23:59:59.000Z

394

Active charge/passive discharge solar heating systems: thermal analysis  

SciTech Connect (OSTI)

The performance of active charge/passive discharge solar space-heating systems is analyzed. This type of system combines liquid-cooled solar collector panels with a massive integral storage component that passively heats the building interior by radiation and free convection. The TRNSYS simulation program is used to evaluate system performance and to provide input for the development of a simplified analysis method. This method, which provides monthly calculations of delivered solar energy, is based on Klein's Phi-bar procedure and data from hourly TRNSYS simulations. The method can be applied to systems using a floor slab, a structural wall, or a water tank as the storage component. Important design parameters include collector area and orientation, building heat loss, collector and heat-exchanger efficiencies, storage capacity, and storage to room coupling.

Swisher, J.

1981-01-01T23:59:59.000Z

395

A review of thermal energy storage technologies and control approaches for solar cooling  

Science Journals Connector (OSTI)

Abstract This paper presents a review of thermal storage media and system design options suitable for solar cooling applications. The review covers solar cooling applications with heat input in the range of 60–250 °C. Special attention is given to high temperature (>100 °C) high efficiency cooling applications that have been largely ignored in existing reviews. Sensible and latent heat storage materials have been tabulated according to their suitability for double effect and triple effect chillers. A summary of system designs for water storage (sensible heat), and phase change material storage (latent heat) has been provided. The article summarizes literature related to solar thermal air-conditioning systems from a material level as well as plant level considerations. This includes evaluating various control strategies for managing the thermal store, that aid in optimal functioning of a solar air conditioning plant. Modeling approaches are reviewed for sizing the solar thermal store, highlighting the large difference seen in specific storage size when applied in different applications.

Sergio Pintaldi; Cristian Perfumo; Subbu Sethuvenkatraman; Stephen White; Gary Rosengarten

2015-01-01T23:59:59.000Z

396

Solar thermal collector system modeling and testing for novel solar cooker .  

E-Print Network [OSTI]

??Solar cookers are aimed at reducing pollution and desertification in the developing world. However, they are often disregarded as they do not give users the… (more)

Foley, Brian, S.B. (Brian M.). Massachusetts; Institute of Technology

2014-01-01T23:59:59.000Z

397

Development of a Technology Roadmap for Solar Thermal Cooling in Austria  

Science Journals Connector (OSTI)

Aim of the project was the development of a technology roadmap for solar thermal cooling in Austria involving the relevant market players. The main contents of the technology roadmap are the compilation of the initial position in terms of existing solar thermal cooling plants as well as relevant R&D results, identification of market potentials, technology development and the necessary measures for it. The technology developments are described in short term, medium term, and long term objectives as well as the connected market relevance for Austria and the economic development of this technology. Scenarios for a useful interaction with other sustainable thermal cooling technologies like cooling with district heating are analyzed to clarify the future position of solar thermal cooling in the Austrian energy supply. The market player of this technology reach from component manufactures (solar thermal collector, ab-/-adsorption chillers, ventilation systems, storages, control, etc.), business enterprises (hotels, breweries, laundries, supermarkets, etc.), building developers and consultancy engineers to research institutions, energy agencies and political decision makers. All of these groups were involved in the development of the technology roadmap by expert workshops and interviews.

Anita Preisler; Tim Selke; Hilbert Focke; Nicole Hartl; Georg Geissegger; Erich Podesser; Alexander Thür

2012-01-01T23:59:59.000Z

398

Advances in the integration of solar thermal energy with conventional and non-conventional power plants  

Science Journals Connector (OSTI)

Pollution and increasing fuel prices are the main focus for governments today. The main cause of pollution is existing electricity power plants that use huge quantities of fossil fuel. A new strategy should be applied in the coming decades based on the integration of existing power plants with renewable energy sources, such as solar and wind energy. Hybridization of existing power plants with solar energy is one proven option to overcome the problems of pollution and increasing fuel prices. In this paper, a review of the previous studies and papers for integrating solar thermal energy with conventional and non-conventional power plants was carried out. The focus on hybrid solar conventional power plants includes: the review of studies of hybrid solar–steam cycle power plants, integrated solar combined-cycle systems (ISCCS) and hybrid solar–gas turbine power plants, while for hybrid solar non-conventional power plants the focus of study is hybrid solar–geothermal power plants. The most successful option is ISCCS due to their advantages and the plans for implementation at various power plants in the world like in Tunisia, Egypt, Spain, and Iran.

M.S. Jamel; A. Abd Rahman; A.H. Shamsuddin

2013-01-01T23:59:59.000Z

399

Thermal characteristics of tubular receivers of solar radiation line concentrators  

Science Journals Connector (OSTI)

A stationary thermal model of an LCS-HR system is considered, taking into account the basic parameters of the problem: availability of a transparent screen, selectivity of the receiver, characteristics of the ...

Sh. I. Klychev; R. A. Zakhidov; R. Khuzhanov; Z. Sh. Klychev…

2013-10-01T23:59:59.000Z

400

Conversion of Concentrated Solar Thermal Energy into Chemical Energy  

Science Journals Connector (OSTI)

When a concentrated solar beam is irradiated to the ceramics such as Ni-ferrite, the high-energy flux in the range of 1500–2500 kW/m2 is absorbed by an excess Frenkel defect formation. This non-equilibrium state ...

Yutaka Tamaura

2012-03-01T23:59:59.000Z

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


401

Solar cooking : the development of a thermal battery  

E-Print Network [OSTI]

There are many rural area in the world where cooking fuel is very scarce. One solution to this problem is to use solar energy to cook food. However most people around the world like to cook large meals at night, when the ...

Cutting, Alexander Chatfield

2007-01-01T23:59:59.000Z

402

High Temperature Thermal Array for Next Generation Solar Thermal Power Production  

Broader source: Energy.gov [DOE]

This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23–25, 2013 near Phoenix, Arizona.

403

Cooling Towers- Energy Conservation Strategies Understanding Cooling Towers  

E-Print Network [OSTI]

Cooling towers are energy conservation devices that Management, more often than not, historically overlooks in the survey of strategies for plant operating efficiencies. The utilization of the colder water off the cooling tower is the money maker!...

Smith, M.

404

Thermal Processing and Characterizations of Dye-Sensitized Solar Cells Based on Nanostructured TiO2  

Science Journals Connector (OSTI)

Thermal Processing and Characterizations of Dye-Sensitized Solar Cells Based on Nanostructured TiO2 ... This work reports an extensive study about the effects of thermal treatments on the performance of TiO2-based dye-sensitized solar cells. ... The current–voltage characteristics were measured using an Advantest R6243 current/voltage unit after a 10 min wait for achieving thermal equilibrium under AM 1.5G, simulated solar light of 100 mW cm–2 and irradiated from a WACOM super solar simulator. ...

Filippo Fabbri; Francesca Detto; Nicola Armani; Norifusa Satoh; Tullo Besagni; Maura Pavesi; Giancarlo Salviati

2013-01-04T23:59:59.000Z

405

Power efficiency for very high temperature solar thermal cavity receivers  

DOE Patents [OSTI]

This invention is an improved solar energy cavity receiver for exposing materials and components to high temperatures. The receiver includes a housing having an internal reflective surface defining a cavity and having an inlet for admitting solar radiation thereto. A photothermal absorber is positioned in the cavity to receive radiation from the inlet. A reflective baffle is positioned between the absorber and the inlet to severely restrict the re-radiation of energy through the inlet. The front surface of the baffle defines a narrow annulus with the internal reflective surface of the housing. The front surface of the baffle is contoured to reflect incoming radiation onto the internal surface of the housing, from which it is reflected through the annulus and onto the front surface of the absorber. The back surface of the baffle intercepts infrared radiation from the front of the absorber. With this arrangement, a high percentage of the solar power input is retained in the cavity; thus, high internal temperatures are attained.

McDougal, Allan R. (LaCanada-Flintridge, CA); Hale, Robert R. (Upland, CA)

1984-01-01T23:59:59.000Z

406

Power Tower | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

50 MW of power from CSP power towers are installed in the United States, Spain, and Germany. The SunShot Initiative funds (R&D) on power tower systems and related aspects within...

407

DRAIN-BACK PROTECTED LOW-FLOW SOLAR HEATING SYSTEM WITH DISTRIBUTED ELEVATED THERMALLY STRATIFIED STORAGE  

Science Journals Connector (OSTI)

ABSTRACT Design considerations concerning a drain-back freeze and overheat protection system are given with emphasis on nitrogen management and thermal stratification of an elevated distributed storage. The actual system of GNT in Berg, Federal Republic of Germany is described. KEYWORDS Solar Heating; Freeze Protection; Overheat Protection; Drain-Back System;

W.B. VELTKAMP; J. VAN BERKEL; A.T. KEESMAN

1990-01-01T23:59:59.000Z

408

Compendium of information on identification and testing of materials for plastic solar thermal collectors  

SciTech Connect (OSTI)

This report is intended to organize and summarize prior and current literature concerning the weathering, aging, durability, degradation, and testing methodologies as applied to materials for plastic solar thermal collectors. Topics covered include (1) rate of aging of polymeric materials; (2) environmental factors affecting performance; (3) evaluation and prediction of service life; (4) measurement of physical and chemical properties; (5) discussion of evaluation techniques and specific instrumentation; (6) degradation reactions and mechanisms; (7) weathering of specific polymeric materials; and (8) exposure testing methodology. Major emphasis has been placed on defining the current state of the art in plastics degradation and on identifying information that can be utilized in applying appropriate and effective aging tests for use in projecting service life of plastic solar thermal collectors. This information will also be of value where polymeric components are utilized in the construction of conventional solar collectors or any application where plastic degradation and weathering are prime factors in material selection.

McGinniss, V.D.; Sliemers, F.A.; Landstrom, D.K.; Talbert, S.G.

1980-07-31T23:59:59.000Z

409

Dynamic response of guyed towers  

E-Print Network [OSTI]

guyed towers. A parametric study was conducted using eigen analysis to determine the effects of consistent mass, geometric stiffness and P-Delta gravity loads. Time domain solutions were obtained by direct integration for motion due to regular Stokes... guyed tower 2 References to guyed tower dynamic analysis 4 Effect of mass formulation on tower natural periods. 5 P-Delta effect on fundamental period. 6 Effect of axial compression on the 1st & 2nd mode. 7 Geometric stiffness effect on natural...

Gillcrist, Mark Christopher

2012-06-07T23:59:59.000Z

410

Technical and economical system comparison of photovoltaic and concentrating solar thermal power systems depending on annual global irradiation  

Science Journals Connector (OSTI)

Concentrating solar thermal power and photovoltaics are two major technologies for converting sunlight to electricity. Variations of the annual solar irradiation depending on the site influence their annual efficiency, specific output and electricity generation cost. Detailed technical and economical analyses performed with computer simulations point out differences of solar thermal parabolic trough power plants, non-tracked and two-axis-tracked PV systems. Therefore, 61 sites in Europe and North Africa covering a global annual irradiation range from 923 to 2438 kW h/m2 a have been examined. Simulation results are usable irradiation by the systems, specific annual system output and levelled electricity cost. Cost assumptions are made for today's cost and expected cost in 10 years considering different progress ratios. This will lead to a cost reduction by 50% for PV systems and by 40% for solar thermal power plants. The simulation results show where are optimal regions for installing solar thermal trough and tracked PV systems in comparison to non-tracked PV. For low irradiation values the annual output of solar thermal systems is much lower than of PV systems. On the other hand, for high irradiations solar thermal systems provide the best-cost solution even when considering higher cost reduction factors for PV in the next decade. Electricity generation cost much below 10 Eurocents per kW h for solar thermal systems and about 12 Eurocents/kW h for PV can be expected in 10 years in North Africa.

Volker Quaschning

2004-01-01T23:59:59.000Z

411

Concrete as a thermal energy storage medium for thermocline solar energy storage systems  

Science Journals Connector (OSTI)

Abstract Rising energy costs and the adverse effect on the environment caused by the burning of fossil fuels have triggered extensive research into alternative sources of energy. Harnessing the abundance of solar energy has been one of the most attractive energy alternatives. However, the development of an efficient and economical solar energy storage system is of major concern. According to the Department of Energy (DOE), the cost per kilowatt hour electric from current technologies which utilize solar energy is high, estimated at approximately $0.15–$0.20/kW helectric, while the unit cost to store the thermal energy is approximately $30.00/kW hthermal. Based on traditional means of producing electricity (through burning fossil fuels), the unit cost of electricity is $0.05–$0.06/kW h. Clearly, current solar energy technologies cannot compete with traditional forms of electricity generation. In response, the DOE has established a goal of reducing the cost of solar generated electricity to $0.05–$0.07/kW helectric and achieving thermal storage costs below $15.00/kW hthermal. Reduction in the cost of the storage medium is one step in achieving the stated goal. In this research program economical concrete mixtures were developed that resisted temperatures up to 600 °C. This temperature level represents a 50% increase over the operating temperature of current systems, which is approximately 400 °C. However, long-term testing of concrete is required to validate its use. At this temperature, the unit cost of energy stored in concrete (the thermal energy storage medium) is estimated at $0.88–$1.00/kW hthermal. These concrete mixtures, used as a thermal energy storage medium, can potentially change solar electric power output allowing production through periods of low to no insolation at lower unit costs.

Emerson John; Micah Hale; Panneer Selvam

2013-01-01T23:59:59.000Z

412

Feasibility of combined solar thermal and ground source heat pump systems in cold climate, Canada  

Science Journals Connector (OSTI)

This document presents a study for examining the viability of hybrid ground source heat pump (GSHP) systems that use solar thermal collectors as the supplemental component in heating dominated buildings. Loads for an actual house in the City of Milton near Toronto, Canada, were estimated. TRNSYS, a system simulation software tool, was used to model yearly performance of a conventional GSHP system as well as a proposed hybrid GSHP system. Actual yearly data collected from the site were examined against the simulation results. This study demonstrates that hybrid ground source heat pump system combined with solar thermal collectors is a feasible choice for space conditioning for heating dominated houses. It was shown that the solar thermal energy storage in the ground could reduce a large amount of ground heat exchanger (GHX) length. Combining three solar thermal collectors with a total area of 6.81 m2 to a GSHP system will reduce GHX length by 15%. Sensitivity analysis was carried out for different cities of Canada and resulted that Vancouver, with mildest climate compared to other cities, was the best candidate for the proposed solar hybrid GSHP system with a GHX length reduction to solar collector area ratio of 7.64 m/m2. Overall system economic viability was also evaluated using a 20-year life-cycle cost analysis. The analysis showed that there is small economic benefit in comparing to the conventional GSHP system. The net present value of the proposed hybrid system based on the 20-year life-cycle cost analysis was estimated to be in a range of 3.7%–7.6% (or $1500 to $3430 Canadian dollar) lower than the conventional GSHP system depending on the drilling cost.

Farzin M. Rad; Alan S. Fung; Wey H. Leong

2013-01-01T23:59:59.000Z

413

Windmill tower shadow eliminator  

SciTech Connect (OSTI)

In a wind driven propeller system an airfoil support for the shaft of a propeller having an even number of blades extends above and below the shaft a distance at least equal to the blade length and pivots with the propeller into the wind for substantially eliminating tower shadow effects on the propeller.

Randolph, A.J.

1984-04-17T23:59:59.000Z

414

High-Temperature Solar Selective Coating Development for Power...  

Broader source: Energy.gov (indexed) [DOE]

High-Temperature Solar Selective Coating Development for Power Tower Receivers - FY13 Q2 High-Temperature Solar Selective Coating Development for Power Tower Receivers - FY13 Q2...

415

Thermal energy storage technologies and systems for concentrating solar power plants  

Science Journals Connector (OSTI)

This paper presents a review of thermal energy storage system design methodologies and the factors to be considered at different hierarchical levels for concentrating solar power (CSP) plants. Thermal energy storage forms a key component of a power plant for improvement of its dispatchability. Though there have been many reviews of storage media, there are not many that focus on storage system design along with its integration into the power plant. This paper discusses the thermal energy storage system designs presented in the literature along with thermal and exergy efficiency analyses of various thermal energy storage systems integrated into the power plant. Economic aspects of these systems and the relevant publications in literature are also summarized in this effort.

Sarada Kuravi; Jamie Trahan; D. Yogi Goswami; Muhammad M. Rahman; Elias K. Stefanakos

2013-01-01T23:59:59.000Z

416

Thermal Evaporation and Characterization of Sb2Se3 Thin Film for Substrate Sb2Se3/CdS Solar Cells  

Science Journals Connector (OSTI)

Thermal Evaporation and Characterization of Sb2Se3 Thin Film for Substrate Sb2Se3/CdS Solar Cells ... Here we report Sb2Se3 solar cells fabricated from thermal evaporation. ... Sb2Se3; thermal evaporation; thin film; solar cells ...

Xinsheng Liu; Jie Chen; Miao Luo; Meiying Leng; Zhe Xia; Ying Zhou; Sikai Qin; Ding-Jiang Xue; Lu Lv; Han Huang; Dongmei Niu; Jiang Tang

2014-06-12T23:59:59.000Z

417

Bionics in textiles: flexible and translucent thermal insulations for solar thermal applications  

Science Journals Connector (OSTI)

...simultaneously high thermal insulation characteristics. The principle...Development of a translucent thermal insulation (a) Polar bear and its fur...show a hollow structure with foam in the core (figure 2...at the same time an ideal insulation material. In combination...

2009-01-01T23:59:59.000Z

418

Pueblo Towers | Open Energy Information  

Open Energy Info (EERE)

Towers Towers Jump to: navigation, search Name Pueblo Towers Facility Pueblo Towers Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Vestas Towers Developer Vestas Towers Energy Purchaser Vestas Towers Location CO Coordinates 38.205834°, -104.588141° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.205834,"lon":-104.588141,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

419

Physical Properties of Solid Particle Thermal Energy Storage Media for Concentrating Solar Power Applications  

Science Journals Connector (OSTI)

Abstract Solid ceramic particles have proven to be an effective heat transfer and thermal storage media for central receiver power production for a heat input temperature up to 1000 °C. In the directly illuminated solid particle receiver, a cascade of ?0.1-1 mm diameter particles is directly heated within a receiver cavity by concentrated solar energy. The efficiency of this approach, with respect to the energy balance on the receiver itself, is dependent on the physical properties of the particles. In this work, the radiative properties, solar weighted absorptance and thermal emittance, have been measured for several commercially available particle candidates both in the as-received state and after thermal exposure to simulate extended operation at elevated temperature in air between 700?C-1000?C. Heating the particles is shown to significantly reduce the solar weighted absorptance of as-received particles within 24 hours of exposure to air at 1000 °C, while heating at 700 °C in air has relatively little effect. In the as-received state, solar weighted absorptance can be as high as 93%, dropping to 84% after 192 hours at 1000?C. Particle stability is better at 700?C, and the solar absorptance remains above 92% after 192 hours of exposure. Analysis using x-ray diffraction (XRD) shows evidence of multiple chemical transformations in the sintered bauxite particle materials, which contain oxides of aluminum, silicon, titanium, and iron, following heating in air. However, the XRD spectra show only small differences between as-received and heat treated particles leaving open the possibility that the observed change in radiative properties results from a change in oxidation state without a concomitant phase change. Regardless of the specific degradation mechanism, t he solar weighted absorptance of the particles can be increased beyond the as-received condition by chemically reducing the particles in forming gas (5%H2 in N2 or Ar) above 700 °C, providing a possible means of periodically rejuvenating degraded particles in situ.

N. Siegel; M. Gross; C. Ho; T. Phan; J. Yuan

2014-01-01T23:59:59.000Z

420

Development of a Combined Hot Water and Sorption Store for Solar Thermal Systems  

Science Journals Connector (OSTI)

Abstract The motivation for the development of a combined hot water and sorption store is to complement the advantages and to reduce the disadvantages of the two particular storage technologies. Hot water stores offer high heat supply rates but are particularly suitable for short term storage due to heat losses whereas for a sorption store the power drain is low but it shows the advantage of a high storage density and long-term heat storage almost without losses. The combined hot water and sorption store has been developed using the example of a solar thermal system for domestic hot water preparation. The store consists of a radial stream adsorber integrated in a hot water store. Adsorption and desorption experiments in laboratory have been conducted with a prototype store in full-scale. A numerical model of the combined store has been developed and annual simulations of a solar thermal system including a combined hot water and sorption store have been conducted. The thermal performance has been compared to those of reference hot water stores. The results of the experimental and numerical investigations will be presented in this paper and the benefit of a combined hot water and sorption store applied for solar thermal systems will be discussed.

Rebecca Weber; Henner Kerskes; Harald Drück

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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.


421

Monograph Series, No. 4: 10 MWe Solar Thermal Central Receiver Pilot Plant heliostat field aimpoint improvements  

SciTech Connect (OSTI)

New early morning and late afternoon heliostat aimpoints have been developed for the 10 MWe Solar Thermal Central Receiver Pilot Plant. These new heliostat aimpoints increase the fraction of the total receiver incident solar energy on selected panels to reduce the early morning start-up time and extend the late afternoon operating time, compared to those in current use at the Pilot Plant. Preliminary results from tests using the new morning start-up aimpoint file indicates that the winter start-up time was reduced by 30 to 45 minutes.

Baker, A.F.; Atwood, D.L.

1986-01-01T23:59:59.000Z

422

Review of combined photovoltaic/thermal collector: solar assisted heat pump system options  

SciTech Connect (OSTI)

The advantages of using photovoltaic (PV) and combined photovoltaic/thermal (PV/T) collectors in conjunction with residential heat pumps are examined. The thermal and electrical power requirements of similar residences in New York City and Fort Worth are the loads under consideration. The TRNSYS energy balance program is used to simulate the operations of parallel, series, and cascade solar assisted heat pump systems. Similar work involving exclusively thermal collectors is reviewed, and the distinctions between thermal and PV/T systems are emphasized. Provided the defrost problem can be satisfactorily controlled, lifecycle cost analyses show that at both locations the optimum collector area is less than 50 m/sup 2/ and that the parallel system is preferred.

Sheldon, D.B.; Russell, M.C.

1980-01-01T23:59:59.000Z

423

Exclusively Thermal Donor-doped Cz Wafers for Silicon Heterojunction Solar Cell Technology  

Science Journals Connector (OSTI)

Abstract In this paper, a first evaluation of the compatibility between thermal donor-doped Czochralski silicon and the hydrogenated amorphous Silicon/crystalline Silicon heterojunction technology, is presented. The wafers resistivity was adjusted thanks to the controlled thermal donors generation through 450 °C anneals of calculated durations, following a model detailed in this paper. Minority carrier lifetimes higher than 2 milliseconds, matching the requirements of the heterojunction technology used, were demonstrated. The solar cells were manufactured and efficiencies comparable to cells based on “high quality” Float-Zone substrates were obtained. The stability of the solar cells performances under illumination and temperature was also assessed, and revealed no degradation of the bulk quality even after prolonged illumination.

Frédéric Jay; Jordi Veirman; Nora Najid; Delfina Muñoz; Sébastien Dubois; Anis Jouini

2014-01-01T23:59:59.000Z

424

Analysis of Concentrating Solar Power with Thermal Energy Storage in a California 33% Renewable Scenario  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Analysis of Concentrating Analysis of Concentrating Solar Power with Thermal Energy Storage in a California 33% Renewable Scenario Paul Denholm, Yih-Huei Wan, Marissa Hummon, and Mark Mehos Technical Report NREL/TP-6A20-58186 March 2013 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 15013 Denver West Parkway Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 An Analysis of Concentrating Solar Power with Thermal Energy Storage in a California 33% Renewable Scenario Paul Denholm, Yih-Huei Wan, Marissa Hummon, and Mark Mehos Prepared under Task No. CP08.8301

425

Control of Noise in Power Station Cooling Tower Systems  

Science Journals Connector (OSTI)

Power?station cooling tower systems must handle large volumes of water and air with large potential energy in the water flows and the requirement for large fans. To minimize the noise generated at power station sites use is made of efficient tower fill materials dual low?speed fans (which shifts the spectrum and lowers mid?frequency noise level) and barrier effects in tower location and orientation. Conventional noise control measures such as mufflers are avoided because of the required increase in pressure across the fan and the high initial cost for quieting large towers. The use of natural draft towers is discussed and it is shown that although the low?frequency noise may be reduced the noise levels at typical property line locations are of the same order of magnitude as that for conventional mechanical cooling towers. Since cooling towers at power stations are required as an environmental (thermal) pollution control measure a trade?off between temperature rise of local water supplies versus increases in community noise becomes a critical factor.

Lewis S. Goodfriend

1973-01-01T23:59:59.000Z

426

Evaluation of distributed building thermal energy storage in conjunction with wind and solar electric power generation  

Science Journals Connector (OSTI)

Abstract Energy storage is often seen as necessary for the electric utility systems with large amounts of solar or wind power generation to compensate for the inability to schedule these facilities to match power demand. This study looks at the potential to use building thermal energy storage as a load shifting technology rather than traditional electric energy storage. Analyses are conducted using hourly electric load, temperature, wind speed, and solar radiation data for a 5-state central U.S. region in conjunction with simple computer simulations and economic models to evaluate the economic benefit of distributed building thermal energy storage (TES). The value of the TES is investigated as wind and solar power generation penetration increases. In addition, building side and smart grid enabled utility side storage management strategies are explored and compared. For a relative point of comparison, batteries are simulated and compared to TES. It is found that cooling TES value remains approximately constant as wind penetration increases, but generally decreases with increasing solar penetration. It is also clearly shown that the storage management strategy is vitally important to the economic value of TES; utility side operating methods perform with at least 75% greater value as compared to building side management strategies. In addition, TES compares fairly well against batteries, obtaining nearly 90% of the battery value in the base case; this result is significant considering TES can only impact building thermal loads, whereas batteries can impact any electrical load. Surprisingly, the value of energy storage does not increase substantially with increased wind and solar penetration and in some cases it decreases. This result is true for both TES and batteries and suggests that the tie between load shifting energy storage and renewable electric power generation may not be nearly as strong as typically thought.

Byron W. Jones; Robert Powell

2015-01-01T23:59:59.000Z

427

City of Medicine Hat Concentrating Solar Thermal Demonstration Project, Alberta, Canada  

Science Journals Connector (OSTI)

Abstract Following a 2007 conceptual feasibility study on a demonstration project to use renewable energy to supplement the production of electricity in their municipal utility, the city council of Medicine Hat approved and identified funding sources to design and construct a commercially Integrated Solar Combined Cycle demonstration with a capacity of 1 MWe. The demonstration project was undertaken as a step to reduce green house gas emissions, explore the viability of concentrating solar thermal technology under local conditions, and introduce concentrated solar power electricity generation in Alberta, which enjoys the highest solar resource of direct normal irradiance (DNI) in the country. The 203 \\{MWe\\} municipal power plant consists of four combustion turbine (CT)/heat recovery steam generator (HRSG) units feeding superheated steam to two steam turbines. The project is located at a latitude of 50° N. Based on recent satellite evaluations of the DNI resource in Canada, a Typical Meteorological Year was established for project design. The solar field consists of eight SkyTrough® (SkyFuel, Arvada, CO) collector assemblies located approximately 400m south of the power plant at a slightly lower elevation. Hot HTF exiting from the solar field is piped down to the power plant, where a solar steam generator (SSG) produces saturated steam for injection into the superheater section of the HRSG of a single CT unit. Permitting, preliminary and detailed design, and procurement tasks are complete. The short construction period started in April 2013 to be completed early Fall 2013 or Spring 2014, followed by commissioning, solar field acceptance testing, and initial operation.

K. MacKenzie; R. Bowers; D. Wacker; R. Drever; A. Jyoti; D. Kearney

2014-01-01T23:59:59.000Z

428

An improved absorption generator for solar-thermal powered heat pumps. Part 2: Energy and economics  

SciTech Connect (OSTI)

Solar heated absorption chiller installations have been very expensive for their rating. To enhance collector thermal efficiency the liquid flowing within the collectors must be kept as cool as possible. However, there is also a need to operate the absorption reported earlier. The compromise usually results in poor collector efficiency as well as a relatively poor specific chiller effect. The proposed vortex generator permits a heat pump to operate efficiently with relatively low temperature solar heated fluid (70--80 C). As a result, the collectors are cooler and more efficient. As noted in Part 1, the specific heat pumping capacity is about 27% greater than conventional systems operating at the same reduced generator temperatures. Therefore, a smaller, less expensive chiller is required. The reduced investment in solar arrays and absorption chillers is estimated along with a range of paybacks.

Fineblum, S. [Megadyne Inc., Rochester, NY (United States)

1997-12-31T23:59:59.000Z

429

Liquid Metal as a Heat Transport Fluid for Thermal Solar Power Applications  

Science Journals Connector (OSTI)

Abstract In order to increase the thermal efficiency and produce process heat for hydrogen production, the operating temperature of the heat transfer fluid in thermal solar plants needs to increase. In addition reaching 900 °C would also increase the heat storage density and the efficiency of the thermodynamic cycle by using a combined cycle for electricity production. The benefits of hydrogen (e.g., for fuel cells) and a more efficient thermodynamic cycle would allow a plant to have a higher energy output per square acre of land use, thereby increasing its economic competiveness. Today, solar thermal plants do not operate at these high temperatures due to the fact that conventional heat transport fluids begin to disintegrate around 600 °C [1,2]. For non-solar applications, low melting-temperature metals, such as wood's metal and lead- bismuth eutectic alloy, have been examined as heat-transport media, because of the large temperature ranges over which they remain liquid. Lead-bismuth eutectic alloy (LBE; 45% Pb, 55% Bi) melts at 125 °C and does not boil until 1670 °C, making it an ideal heat-transfer medium for application in thermal solar power [3]. The main obstacle to using LBE is finding structural materials that can withstand the harsh corrosion environments at high temperatures. In this work the key issues of materials exposed to liquid metal are described while initial data on carious steels tested in liquid metal are provided. While corrosion is a significant issue in this environment, mechanical failure of steels in liquid metal are discussed as well.

D. Frazer; E. Stergar; C. Cionea; P. Hosemann

2014-01-01T23:59:59.000Z

430

Organic Rankine power conversion subsystem development for the small community solar thermal power system  

SciTech Connect (OSTI)

The development and preliminary test results for an air-cooled, hermetically sealed 20 kW sub E organic Rankine cycle engine/alternator unit for use with point focussing distributed receiver solar thermal power system. A 750 F toluene is the working fluid and the system features a high speed, single-stage axial flow turbine direct-coupled to a permanent magnet alternator. Good performance was achieved with the unit in preliminary tests.

Barber, R.E.; Boda, F.P.

1982-07-01T23:59:59.000Z

431

SunShot Initiative: Baseload Concentrating Solar Power Generation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Concentrating Solar Power Generation Concentrating Solar Power Generation In 2010, DOE issued the Baseload Concentrating Solar Power (CSP) Generation funding opportunity announcement (FOA). The following projects were selected under this competitive solicitation: Abengoa: Advanced Nitrate Salt Central Receiver Power Plant eSolar: Modular and Scalable Baseload Molten Salt Plant Conceptual Design and Feasibility General Atomics: Baseload CSP Generation Integrated with Sulfur-Based Thermochemical Heat Storage HiTek: Low-Cost Heliostat Development Infinia: Innovative Phase Change Thermal Energy Storage Solution for Baseload Power PPG: Next-Generation Low-Cost Reflector Rocketdyne: Solar Power Tower Improvements with the Potential to Reduce Costs SENER: High-Efficiency Thermal Storage System for Solar Plants

432

Transition Region Emission and Energy Input to Thermal Plasma During the Impulsive Phase of Solar Flares  

E-Print Network [OSTI]

The energy released in a solar flare is partitioned between thermal and non-thermal particle energy and lost to thermal conduction and radiation over a broad range of wavelengths. It is difficult to determine the conductive losses and the energy radiated at transition region temperatures during the impulsive phases of flares. We use UVCS measurements of O VI photons produced by 5 flares and subsequently scattered by O VI ions in the corona to determine the 5.0 thermal energy and the conductive losses deduced from RHESSI and GOES X-ray data using areas from RHESSI images to estimate the loop volumes, cross-sectional areas and scale lengths. The transition region luminosities during the impulsive phase exceed the X-ray luminosities for the first few minutes, but they are smaller than the rates of increase of thermal energy unless the filling factor of the X-ray emitting gas is ~ 0.01. The estimated conductive losses from the hot gas are too large to be balanced by radiative losses or heating of evaporated plasma, and we conclude that the area of the flare magnetic flux tubes is much smaller than the effective area measured by RHESSI during this phase of the flares. For the 2002 July 23 flare, the energy deposited by non-thermal particles exceeds the X-ray and UV energy losses and the rate of increase of the thermal energy.

J. C. Raymond; G. Holman; A. Ciaravella; A. Panasyuk; Y. -K. Ko; J. Kohl

2007-01-12T23:59:59.000Z

433

Towards an improved architectural quality of building integrated solar thermal systems (BIST)  

Science Journals Connector (OSTI)

Architectural integration is a major issue in the development and spreading of solar thermal technologies. Yet the architectural quality of most existing building integrated solar thermal systems (BIST) is quite poor, which often discourages potential new users. In this paper, the results of a large web survey on architectural quality, addressed to more than 170 European architects and other building professionals are presented and commented. Integration criteria and design guidelines established and confirmed through the analysis of these results are proposed. Subsequently, a novel methodology to design future solar thermal collectors systems suited to building integration is described, showing a new range of design possibilities. The methodology focuses on the essential teamwork between architects and engineers to ensure both energy efficiency and architectural integrability, while playing with the formal characteristics of the collectors (size, shape, colour, etc.). Finally a practical example of such a design process conducted within the European project SOLABS is given; the resulting collector is described, and integration simulations are presented.

MariaCristina Munari Probst; Christian Roecker

2007-01-01T23:59:59.000Z

434

Solar Thermal Energy: Possibilities of its Use in Low-Income Areas of Metro SÃO Paulo, Brazil  

Science Journals Connector (OSTI)

This article calls the attention to the increase of energy consumption world wide and the importance of renewable sources of energy to reduce environmental degradation and fight climate change. Solar thermal energy

Maria-Lucia Borba

2009-01-01T23:59:59.000Z

435

List of Publications A Numerical Study of Transient Mixed Convection Flows in a Thermal Storage Tank, J. Solar  

E-Print Network [OSTI]

List of Publications A Numerical Study of Transient Mixed Convection Flows in a Thermal Storage Tank, J. Solar Energy Eng. 105, 246­253 (1983) (with A.M.C. Chan & D. Giusti) An Approximate Analytical

Smereka, Peter

436

Investigation of the Solar Energy Utilization for Meeting Part of the Thermal Demands of Agricultural-Product Mechanical Dryers  

Science Journals Connector (OSTI)

In this study a methodology for the determination of the fraction of thermal loads supplied by a solar energy system, employed for preheating air in a ... . The basic parameters influencing the mechanical-dryer energy

Stamatios Babalis; Elias Papanikolaou…

2009-01-01T23:59:59.000Z

437

Energy 101: Concentrating Solar Power | Department of Energy  

Energy Savers [EERE]

From towers to dishes to linear mirrors to troughs, concentrating solar power (CSP) technologies reflect and collect solar heat to generate electricity. A single CSP...

438

Solar gas turbine systems: Design, cost and perspectives  

Science Journals Connector (OSTI)

The combination of high solar shares with high conversion efficiencies is one of the major advantages of solar gas turbine systems compared to other solar-fossil hybrid power plants. Pressurized air receivers are used in solar tower plants to heat the compressed air in the gas turbine to temperatures up to 1000 °C. Therefore solar shares in the design case of 40% up to 90% can be realized and annual solar shares up to 30% can be achieved in base load. Using modern gas turbine systems in recuperation or combined cycle mode leads to conversion efficiencies of the solar heat from around 40% up to more than 50%. This is an important step towards cost reduction of solar thermal power. Together with the advantages of hybrid power plants—variable solar share, fully dispatchable power, 24 h operation without storage—solar gas turbine systems are expected to have a high potential for market introduction in the mid term view. In this paper the design and performance assessment of several prototype plants in the power levels of 1 MW, 5 MW and 15 MW are presented. Advanced software tools are used for design optimization and performance prediction of the solar tower gas turbine power plants. Detailed cost assumptions for the solarized gas turbine, the solar tower plant and further equipment as well as for operation and maintenance are presented. Intensive performance and economic analysis of the prototype plants for different locations and capacity factors are shown. The cost reduction potential through automation and remote operation is revealed.

Peter Schwarzbözl; Reiner Buck; Chemi Sugarmen; Arik Ring; Ma Jesús Marcos Crespo; Peter Altwegg; Juan Enrile

2006-01-01T23:59:59.000Z

439

The Thermal Environment of the Fiber Glass Dome for the New Solar Telescope at Big Bear Solar Observatory  

E-Print Network [OSTI]

The New Solar Telescope (NST) is a 1.6-meter off-axis Gregory-type telescope with an equatorial mount and an open optical support structure. To mitigate the temperature fluctuations along the exposed optical path, the effects of local/dome-related seeing have to be minimized. To accomplish this, NST will be housed in a 5/8-sphere fiberglass dome that is outfitted with 14 active vents evenly spaced around its perimeter. The 14 vents house louvers that open and close independently of one another to regulate and direct the passage of air through the dome. In January 2006, 16 thermal probes were installed throughout the dome and the temperature distribution was measured. The measurements confirmed the existence of a strong thermal gradient on the order of 5 degree Celsius inside the dome. In December 2006, a second set of temperature measurements were made using different louver configurations. In this study, we present the results of these measurements along with their integration into the thermal control system (ThCS) and the overall telescope control system (TCS).

A. P. Verdoni; C. Denker; J. R. Varsik; S. Shumko; J. Nenow; R. Coulter

2007-08-04T23:59:59.000Z

440

Solar Thermal Conversion of Biomass to Synthesis Gas: Cooperative Research and Development Final Report, CRADA Number CRD-09-00335  

SciTech Connect (OSTI)

The CRADA is established to facilitate the development of solar thermal technology to efficiently and economically convert biomass into useful products (synthesis gas and derivatives) that can replace fossil fuels. NREL's High Flux Solar Furnace will be utilized to validate system modeling, evaluate candidate reactor materials, conduct on-sun testing of the process, and assist in the development of solar process control system. This work is part of a DOE-USDA 3-year, $1M grant.

Netter, J.

2013-08-01T23:59:59.000Z

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


441

Comparison of an impedance heating system to mineral insulated heat trace for power tower applications  

SciTech Connect (OSTI)

A non-conventional type of heating system is being tested at Sandia National Laboratories for solar thermal power tower applications. In this system, called impedance heating, electric current flows directly through the pipe to maintain the desired temperature. The pipe becomes the resistor where the heat is generated. Impedance heating has many advantages over previously used mineral insulated (MI) heat trace. An impedance heating system should be much more reliable than heat trace cable since delicate junctions and cabling are not used and the main component, a transformer, is inherently reliable. A big advantage of impedance heating is the system can be sized to rapidly heat up the piping to provide rapid response times necessary in cyclic power plants such as solar power towers. In this paper, experimental results from testing an impedance heating system are compared to MI heat trace. The authors found impedance heating was able to heat piping rapidly and effectively. There were not significant stray currents and impedance heating did not affect instrumentation.

Pacheco, J.E.; Kolb, W.J.

1997-03-01T23:59:59.000Z

442

Cooling Towers Make Money  

E-Print Network [OSTI]

was hired and wrote specifications for a four cell induced draft counterflow cooling tower to cool 10,000 GPM entering at 95 0 F leaving at 85 0 F during an 80 0 F ambient wet bulb temperature. The specifications required that the bidders project a... F during an ambient wet bulb temperature of 7] OF could not be met The SuperCellular film fill, style] 3] 62 Illustration 3 was selected by the consultant because of its previous highly satisfactory service in sewage treatment trickling filter...

Burger, R.

443

Design and optimization of solid thermal energy storage modules for solar thermal power plant applications  

Science Journals Connector (OSTI)

Abstract Solid sensible heat storage is an attractive option for high-temperature storage applications in terms of investment and maintenance costs. Typical solid thermal energy storage systems use a heat transfer fluid to exchange heat as the fluid flows through a tubular heat exchanger embedded in the solid storage material. The modified lumped capacitance method is used with an effective heat transfer coefficient in a simplified analysis of the heat transfer in solid thermal energy storage systems for a solid cylindrical heat storage unit. The analytical solution was found using the Laplace transform method. The solution was then used to develop an optimization method for designing solid storage modules which uses the system requirements (released energy and fluid outlet temperature) as the constraint conditions and the storage module cost as the objective function for the optimization. Optimized results are then given for many kinds of system configurations.

Yongfang Jian; Quentin Falcoz; Pierre Neveu; Fengwu Bai; Yan Wang; Zhifeng Wang

2015-01-01T23:59:59.000Z

444

A passive solar test facility for Saudi Arabia  

SciTech Connect (OSTI)

A passive solar test facility has been designed for Dammam, Saudi Arabia. It will be located on the campus of King Faisal University, adjacent to the Persian Gulf. This maritime desert climate is terribly sevre, and one for which it is a formidable challenge to design a year around thermally efficient building. This facility incorporates seven different passive strategies: proper orientation, operable shading for windows, flow-through ventilation, externally insulated thermal mass, wind tower with direct evaporative cooling, indirect evaporative cooling through a double shell, and solar water heating. Construction should begin in June of 1983. Upon completion, the building will be monitored for at least two years.

Woods, P.K.

1983-06-01T23:59:59.000Z

445

Solar Meridional Circulation from Doppler Shifts of the Fe I line at lambda 5250 Angstroms as Measured by the 150-foot Solar Tower Telescope at the Mt. Wilson Observatory  

E-Print Network [OSTI]

Doppler shifts of the Fe I spectral line at lambda5250 Angstroms from the full solar disk obtained over the period 1986 to 2009 are analyzed to determine the circulation velocity of the solar surface along meridional planes. Simultaneous measurements of the Zeeman splitting of this line are used to obtain measurements of the solar magnetic field that are used to select low field points and impose corrections for the magnetically induced Doppler shift. The data utilized is from a new reduction that preserves the full spatial resolution of the original observations so that the circulation flow can be followed to latitudes of 80 degrees N/S. The deduced meridional flow is shown to differ from the circulation velocities derived from magnetic pattern movements. A reversed circulation pattern is seen in polar regions for three successive solar minima. An surge in circulation velocity at low latitudes is seen during the rising phases of cycles 22 and 23.

Ulrich, Roger K

2010-01-01T23:59:59.000Z

446

FLORIDA TOWER FOOTPRINT EXPERIMENTS  

SciTech Connect (OSTI)

The Florida Footprint experiments were a series of field programs in which perfluorocarbon tracers were released in different configurations centered on a flux tower to generate a data set that can be used to test transport and dispersion models. These models are used to determine the sources of the CO{sub 2} that cause the fluxes measured at eddy covariance towers. Experiments were conducted in a managed slash pine forest, 10 km northeast of Gainesville, Florida, in 2002, 2004, and 2006 and in atmospheric conditions that ranged from well mixed, to very stable, including the transition period between convective conditions at midday to stable conditions after sun set. There were a total of 15 experiments. The characteristics of the PFTs, details of sampling and analysis methods, quality control measures, and analytical statistics including confidence limits are presented. Details of the field programs including tracer release rates, tracer source configurations, and configuration of the samplers are discussed. The result of this experiment is a high quality, well documented tracer and meteorological data set that can be used to improve and validate canopy dispersion models.

WATSON,T.B.; DIETZ, R.N.; WILKE, R.; HENDREY, G.; LEWIN, K.; NAGY, J.; LECLERC, M.

2007-01-01T23:59:59.000Z

447

Solar Carbon Monoxide, Thermal Profiling, and the Abundances of C, O, and their Isotopes  

E-Print Network [OSTI]

A solar photospheric "thermal profiling" analysis is presented, exploiting the infrared rovibrational bands of carbon monoxide (CO) as observed with the McMath-Pierce Fourier transform spectrometer (FTS) at Kitt Peak, and from above the Earth's atmosphere by the Shuttle-borne ATMOS experiment. Visible continuum intensities and center-limb behavior constrained the temperature profile of the deep photosphere, while CO center-limb behavior defined the thermal structure at higher altitudes. The oxygen abundance was self consistently determined from weak CO absorptions. Our analysis was meant to complement recent studies based on 3-D convection models which, among other things, have revised the historical solar oxygen (and carbon) abundance downward by a factor of nearly two; although in fact our conclusions do not support such a revision. Based on various considerations, an oxygen abundance of 700+/-100 ppm (parts per million relative to hydrogen) is recommended; the large uncertainty reflects the model sensitivity of CO. New solar isotopic ratios also are reported for 13C, 17O, and 18O.

Thomas R. Ayres; Claude Plymate; Christoph U. Keller

2006-06-07T23:59:59.000Z

448

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

449

Life Cycle Assessment of solar energy systems: Comparison of photovoltaic and water thermal heater at domestic scale  

Science Journals Connector (OSTI)

Abstract This study is concerned with the results of a Life Cycle Assessment comparison between photovoltaic – silicon based modules and thin film modules – and solar thermal systems, as technologies which are usually installed for partially covering household energy demand. Several studies focused on energy and environmental performances of photovoltaic and solar thermal collectors, however they have been always analysed separately. This study proposes the comparison of different systems to exploit the solar energy, producing different energy types. The comparison was done referring to one square meter of roof surface occupied by the equipment. The environmental burdens were calculated according to the indicators proposed by Eco-indicator'95 method. The results showed that the system based on thermal solar collector obtained the major number of more favourable indicators: eight out of ten, in the case of no-recycling of materials after dismantling phase, and six out of ten in the case of recycling of materials after dismantling phase. The thin film modules and solar thermal collector showed the lowest values of energy payback time and \\{CO2eq\\} payback time. Results clearly show that photovoltaic and solar thermal collector can effectively provide comparable environmental and energy benefits as regard to domestic scale installation.

E. Carnevale; L. Lombardi; L. Zanchi

2014-01-01T23:59:59.000Z

450

Assessing thermal energy storage technologies of concentrating solar plants for the direct coupling with chemical processes. The case of solar-driven biomass gasification  

Science Journals Connector (OSTI)

Abstract Dynamic simulation, design improvements and control issues in solar power plants might compete with special considerations on energy storing techniques. In order to provide the stability in production of power or chemical commodities in spite of discontinuity in the source of energy, i.e., sun, overall concerns in the details of solar power plant, competition and comparison of common storing technologies should be taken into account to ensure the effectiveness and continuity of the supply. This research activity is aimed at extending the study from the power generation purpose to the solar-supplied chemical commodities production, highlighting the limitations of certain well-established thermal energy storage techniques when concentrating solar is directly coupled with chemical processes. The (intrinsically dynamic and closed-loop) simulation of solar power plants and direct thermal energy storage technologies is performed for the direct thermal energy storage technologies and, only for the case of thermocline, it is coupled with computational fluid-dynamic (CFD) studies for the proper assessment of molten salt and steam temperature trends. To investigate benefits/restrictions of the storage technologies, the solar steam generation is integrated with the gasification of biomasses for syngas production. Also, first-principles dynamic model for the biomass gasifier is provided.

Flavio Manenti; Andres R. Leon-Garzon; Zohreh Ravaghi-Ardebili; Carlo Pirola

2014-01-01T23:59:59.000Z

451

Operational Performance Results of an Innovative Solar Thermal Cooling and Heating Plant  

Science Journals Connector (OSTI)

Solar thermal cooling and heating plants with single-effect sorption chillers/heat pumps promise primary energy savings compared to electric vapor compression chiller systems. Yet, the need of auxiliary electric a nd fossil energy for the operation and backup of the thermal cooling system possibly worsen the primary energy balance. An auspicious approach to overcome this problem is the application of a more efficient multi -stage sorption chiller with flexible operational modes. A pilot installation of that innovative solar thermal heating and cooling plant comprising a two stage absorption chiller/heat pump is presented. Beginning with the motivation and the system concept, a detailed analysis of the 2011/2012 cooling and heating periods is shown. The influence of the different system components – especially the absorption chiller – on the overall system performance is analyzed and a comparison to data from a detailed dynamic model is carried out. Recommendations for the improvement with respect to efficiency and economic aspects are given based on the installation process and the operational experience gained in the last 1 ½ years.

Manuel Riepl; Felix Loistl; Richard Gurtner; Martin Helm; Christian Schweigler

2012-01-01T23:59:59.000Z

452

Best Management Practice #10: Cooling Tower Management  

Broader source: Energy.gov [DOE]

Cooling towers regulate temperature by dissipating heat from recirculating water used to cool chillers, air-conditioning equipment, or other process equipment. Heat is rejected from the tower...

453

Outdoor testing of advanced optical materials for solar thermal electric applications  

SciTech Connect (OSTI)

The development of low-cost, durable advanced optical materials is an important element in making solar energy viable for electricity production. It is important to determine the expected lifetime of candidate reflector materials in real-world service conditions. The demonstration of the optical durability of such materials in outdoor environments is critical to the successful commercialization of solar thermal electric technologies. For many years optical performance data have been collected and analyzed by the National Renewable Energy Laboratory (NREL) for candidate reflector materials subjected to simulated outdoor exposure conditions. Much of this testing is accelerated in order to predict service durability. Some outdoor testing has occurred but not in a systematic manner. To date, simulated/accelerated testing has been limited correlation with actual outdoor exposure testing. Such a correlation is desirable to provide confidence in lifetime predictions based upon accelerated weathering methods. To obtain outdoor exposure data for realistic environments and to establish a data base for correlating simulated/accelerated outdoor exposure data with actual outdoor exposure data, the development of an expanded outdoor testing program has recently been initiated by NREL. Several outdoor test sites will be selected based on the solar climate, potential for solar energy utilization by industry, and cost of installation. Test results are site dependent because exposure conditions vary with geographical location. The importance of this program to optical materials development is outlined, and the process used to determine and establish the outdoor test sites is described. Candidate material identification and selection is also discussed. 10 refs.

Wendelin, T.J.; Jorgensen, G.; Goggin, R.M.

1992-05-01T23:59:59.000Z

454

Neural network modelling of thermal stratification in a solar DHW storage  

SciTech Connect (OSTI)

In this study an artificial neural network (ANN) model is introduced for modelling the layer temperatures in a storage tank of a solar thermal system. The model is based on the measured data of a domestic hot water system. The temperatures distribution in the storage tank divided in 8 equal parts in vertical direction were calculated every 5 min using the average 5 min data of solar radiation, ambient temperature, mass flow rate of collector loop, load and the temperature of the layers in previous time steps. The introduced ANN model consists of two parts describing the load periods and the periods between the loads. The identified model gives acceptable results inside the training interval as the average deviation was 0.22 C during the training and 0.24 C during the validation. (author)

Geczy-Vig, P.; Farkas, I. [Department of Physics and Process Control, Szent Istvan University, Pater K. u. 1., H-2103 Goedoello (Hungary)

2010-05-15T23:59:59.000Z

455

On the feasibility of colored glazed thermal solar collectors based on thin film interference filters  

Science Journals Connector (OSTI)

Glazed thermal solar collectors, typically equipped with black, optical selective absorber sheets, exhibit good energy conversion efficiency. However, the black color, and sometimes the visibility of tubes and corrugations of the metal sheets, limit the architectural integration into buildings. In order to overcome this drawback, interference filters are considered as a promising approach. Multilayered thin film stacks deposited on the cover glass can produce a colored reflection hiding the black absorber without a great loss of energy. These interference filters are designed and optimized by numerical simulation. Such coatings are deposited by vacuum processes (e.g. magnetron sputtering) and also via the SolGel method. Optical measurements, such as real-time laser-reflectometry and spectrophotometry, are suitable to determine film thicknesses and optical constants of individual layers, and to measure color coordinates and solar transmittance for the multilayer stacks. Advantages and disadvantages of the different coating processes are discussed.

A. Schüler; C. Roecker; J.-L. Scartezzini; J. Boudaden; I.R. Videnovic; R.S.-C. Ho; P. Oelhafen

2004-01-01T23:59:59.000Z

456

An improved absorption generator for solar-thermal powered heat pumps. Part 1: Feasibility  

SciTech Connect (OSTI)

Solar heated absorption chiller installations have been, typically, very expensive for their rating. The need to keep the liquid flowing within the collectors as cool as possible to enhance collector thermal efficiency, conflicts with the need to operate the absorption chiller at a higher temperature. The compromise usually results in poor collector efficiency as well as a relatively poor specific chiller effect. The proposed vortex generator permits a heat pump to operate efficiently with relatively low temperature solar heated fluid (70--80 C). As a result, the collectors are cooler and much more efficient. In addition, the specific heat pumping capacity is about 27% greater than conventional systems operating at the same reduced generator temperatures and, therefore, a smaller chiller is required. The economic consequences of these benefits will be presented in Part 2.

Fineblum, S. [Megadyne Inc., Rochester, NY (United States)

1997-12-31T23:59:59.000Z

457

Millimeter radiation from a 3D model of the solar atmosphere I. Diagnosing chromospheric thermal structure  

E-Print Network [OSTI]

Aims. We use advanced 3D NLTE radiative magnetohydrodynamic simulations of the solar atmosphere to carry out detailed tests of chromospheric diagnostics at millimeter and submillimeter wavelengths. Methods. We focused on the diagnostics of the thermal structure of the chromosphere in the wavelength bands from 0.4 mm up to 9.6 mm that can be accessed with the Atacama Large Millimeter/Submillimeter Array (ALMA) and investigated how these diagnostics are affected by the instrumental resolution. Results. We find that the formation height range of the millimeter radiation depends on the location in the simulation domain and is related to the underlying magnetic structure. Nonetheless, the brightness temperature is a reasonable measure of the gas temperature at the effective formation height at a given location on the solar surface. There is considerable scatter in this relationship, but this is significantly reduced when very weak magnetic fields are avoided. Our results indicate that although instrumental smearin...

Loukitcheva, Maria; Carlsson, Mats; White, Stephen

2015-01-01T23:59:59.000Z

458

Understanding local adoption of tax credits to promote solar-thermal energy: Spanish municipalities' case  

Science Journals Connector (OSTI)

Abstract Spanish local governments may offer, in accordance with Royal Decree 2/2004, tax credits up to 50% in Real Estate Tax for those with installed solar powered thermal or electrical energy systems. This paper analyzes by logistic regression estimation which factors influence the decision of governments to implement this tax credit. Factors included as explanatory variables are related to the characteristics of municipalities, fiscal stress, environmental stress, the environmentally friendly nature of municipalities, the neighboring effect, and economic motivations. Results show that municipalities applying these measures are mostly large in size, with high solar potential, with predominantly collective-housing buildings, with low fiscal stress, mainly rural, environmentally friendly, surrounded by municipalities implementing similar measures and with higher unemployment rates.

José Manuel González-Limón; María del P. Pablo-Romero; Antonio Sánchez-Braza

2013-01-01T23:59:59.000Z

459

Numerical Study on the Thermal Performance of a Novel Impinging Type Solar Receiver for Solar Dish-Brayton System.  

E-Print Network [OSTI]

?? An impinging type solar receiver has been designed for potential applications in a future Brayton Solar Dish System. The EuroDish system is employed as… (more)

Xu, Haoxin

2013-01-01T23:59:59.000Z

460

SunDwel Solar Limited | Open Energy Information  

Open Energy Info (EERE)

SunDwel Solar Limited Jump to: navigation, search Logo: SunDwel Solar Limited Name: SunDwel Solar Limited Address: 1 Tower Road Place: Washington, United Kingdom Sector: Solar...

Note: This page contains sample records for the topic "tower solar thermal" 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.


461

Evaluation of annual efficiencies of high temperature central receiver concentrated solar power plants with thermal energy storage.  

SciTech Connect (OSTI)

The current study has examined four cases of a central receiver concentrated solar power plant with thermal energy storage using the DELSOL and SOLERGY computer codes. The current state-of-the-art base case was compared with a theoretical high temperature case which was based on the scaling of some input parameters and the estimation of other parameters based on performance targets from the Department of Energy SunShot Initiative. This comparison was done for both current and high temperature cases in two configurations: a surround field with an external cylindrical receiver and a north field with a single cavity receiver. There is a fairly dramatic difference between the design point and annual average performance, especially in the solar field and receiver subsystems, and also in energy losses due to the thermal energy storage being full to capacity. Additionally, there are relatively small differences (<2%) in annual average efficiencies between the Base and High Temperature cases, despite an increase in thermal to electric conversion efficiency of over 8%. This is due the increased thermal losses at higher temperature and operational losses due to subsystem start-up and shut-down. Thermal energy storage can mitigate some of these losses by utilizing larger thermal energy storage to ensure that the electric power production system does not need to stop and re-start as often, but solar energy is inherently transient. Economic and cost considerations were not considered here, but will have a significant impact on solar thermal electric power production strategy and sizing.

Ehrhart, Brian David; Gill, David Dennis

2013-07-01T23:59:59.000Z

462

Phase-change thermal energy storage: Final subcontract report  

SciTech Connect (OSTI)

The research and development described in this document was conducted within the US Department of Energy's Solar Thermal Technology Program. The goal of this program is to advance the engineering and scientific understanding of solar thermal technology and to establish the technology base from which private industry can develop solar thermal power production options for introduction into the competitive energy market. Solar thermal technology concentrates the solar flux using tracking mirrors or lenses onto a receiver where the solar energy is absorbed as heat and converted into electricity or incorporated into products as process heat. The two primary solar thermal technologies, central receivers and distributed receivers, employ various point and line-focus optics to concentrate sunlight. Current central receiver systems use fields of heliostats (two-axes tracking mirrors) to focus the sun's radiant energy onto a single, tower-mounted receiver. Point focus concentrators up to 17 meters in diameter track the sun in two axes and use parabolic dish mirrors or Fresnel lenses to focus radiant energy onto a receiver. Troughs and bowls are line-focus tracking reflectors that concentrate sunlight onto receiver tubes along their focal lines. Concentrating collector modules can be used alone or in a multimodule system. The concentrated radiant energy absorbed by the solar thermal receiver is transported to the conversion process by a circulating working fluid. Receiver temperatures range from 100{degree}C in low-temperature troughs to over 1500{degree}C in dish and central receiver systems. 12 refs., 119 figs., 4 tabs.

Not Available

1989-11-01T23:59:59.000Z

463

Off-design performance analysis of a closed-cycle ocean thermal energy conversion system with solar thermal preheating and superheating  

Science Journals Connector (OSTI)

Abstract This article reports the off-design performance analysis of a closed-cycle ocean thermal energy conversion (OTEC) system when a solar thermal collector is integrated as an add-on preheater or superheater. Design-point analysis of a simple OTEC system was numerically conducted to generate a gross power of 100 kW, representing a base OTEC system. In order to improve the power output of the OTEC system, two ways of utilizing solar energy are considered in this study: (1) preheating of surface seawater to increase its input temperature to the cycle and (2) direct superheating of the working fluid before it enters a turbine. Obtained results reveal that both preheating and superheating cases increase the net power generation by 20–25% from the design-point. However, the preheating case demands immense heat load on the solar collector due to the huge thermal mass of the seawater, being less efficient thermodynamically. The superheating case increases the thermal efficiency of the system from 1.9% to around 3%, about a 60% improvement, suggesting that this should be a better approach in improving the OTEC system. This research provides thermodynamic insight on the potential advantages and challenges of adding a solar thermal collection component to OTEC power plants.

Hakan Aydin; Ho-Saeng Lee; Hyeon-Ju Kim; Seung Kyoon Shin; Keunhan Park

2014-01-01T23:59:59.000Z

464

Multi-Criteria Decision Analysis of Concentrated Solar Power with Thermal Energy Storage and Dry Cooling  

Science Journals Connector (OSTI)

For comparison, the ratio of life cycle GHG emissions to LCOE for pulverized coal (PC), integrated gasification combined cycle (IGCC), natural gas combined cycle (NGCC), PC with carbon capture and storage (CCS), IGCC with CCS, and NGCC with CCS are 31, 19, 12, 3, 2, and 2 kgCO2eq/$, respectively (Supporting Information Table S4, p S10). ... Poullikkas, A.Economic analysis of power generation from parabolic trough solar thermal plants for the Mediterranean region—A case study for the island of Cyprus Renewable Sustainable Energy Rev. 2009, 13 ( 9) 2474– 2484 ...

Sharon J. W. Klein

2013-11-18T23:59:59.000Z

465

Simulating the Value of Concentrating Solar Power with Thermal Energy Storage in a Production Cost Model  

SciTech Connect (OSTI)

Concentrating solar power (CSP) deployed with thermal energy storage (TES) provides a dispatchable source of renewable energy. The value of CSP with TES, as with other potential generation resources, needs to be established using traditional utility planning tools. Production cost models, which simulate the operation of grid, are often used to estimate the operational value of different generation mixes. CSP with TES has historically had limited analysis in commercial production simulations. This document describes the implementation of CSP with TES in a commercial production cost model. It also describes the simulation of grid operations with CSP in a test system consisting of two balancing areas located primarily in Colorado.

Denholm, P.; Hummon, M.

2012-11-01T23:59:59.000Z

466

Kinematic Stirling engine as an energy conversion subsystem for paraboloidal dish solar thermal power plants  

SciTech Connect (OSTI)

The potential of a suitably designed and economically manufactured Stirling engine as the energy conversion subsystem of a paraboloidal dish-Stirling solar thermal power module has been estimated. Results obtained by elementary cycle analyses have been shown to match quite well the performance characteristics of an advanced kinematic Stirling engine, the United Stirling P-40, as established by current prototypes of the engine and by a more sophisticated analytic model of its advanced derivative. In addition to performance, brief consideration has been given to other Stirling engine criteria such as durability, reliability, and serviceability. Production costs have not been considered here.

Bowyer, J.M.

1984-04-15T23:59:59.000Z

467

Kinematic Stirling engine as an energy conversion subsystem for paraboloidal dish solar thermal plants  

SciTech Connect (OSTI)

The potential of a suitably designed and economically manufactured Stirling engine as the energy conversion subsystem of a paraboloidal dish-Stirling solar thermal power module was estimated. Results obtained by elementary cycle analyses were shown to match quite well the performance characteristics of an advanced kinematic Stirling engine, the United Stirling P-40, as established by current prototypes of the engine and by a more sophisticated analytic model of its advanced derivative. In addition to performance, brief consideration was given to other Stirling engine criteria such as durability, reliability, and serviceability. Production costs were not considered here.

Bowyer, J.M.

1984-04-01T23:59:59.000Z

468

Solar central receiver in perspective  

SciTech Connect (OSTI)

The variation in the energy costs of solar central receiver systems as a function of power level, receiver geometry, heliostat size, and heliostat canting option are presented. The results were obtained using a new version of the DELSOL computer model. A broad minimum in the cost of thermal energy at the base of the tower is observed in systems with power levels from 10 MW/sub t/ to over 1000 MW/sub t/. In addition, this power range can be served by a single heliostat design.

Dellin, T.A.

1980-01-01T23:59:59.000Z

469

Opto-thermal analysis of a lightweighted mirror for solar telescope  

E-Print Network [OSTI]

In this paper, an opto-thermal analysis of a moderately heated lightweighted solar telescope mirror is carried out using 3D finite element analysis (FEA). A physically realistic heat transfer model is developed to account for the radiative heating and energy exchange of the mirror with surroundings. The numerical simulations show the non-uniform temperature distribution and associated thermo-elastic distortions of the mirror blank clearly mimicking the underlying discrete geometry of the lightweighted substrate. The computed mechanical deformation data is analyzed with surface polynomials and the optical quality of the mirror is evaluated with the help of a ray-tracing software. The thermal print-through distortions are further shown to contribute to optical figure changes and mid-spatial frequency errors of the mirror surface. A comparative study presented for three commonly used substrate materials, namely, Zerodur, Pyrex and Silicon Carbide (SiC) is relevant to vast area of large optics requirements in gro...

Banyal, Ravinder K; Chatterjee, S

2013-01-01T23:59:59.000Z

470

Coloured Solar-thermal Absorbers – A Comparative Analysis of Cermet Structures  

Science Journals Connector (OSTI)

Abstract Novel coloured solar-thermal absorber coatings are obtained as thin films of alumina infiltrated with pigment oxides (Fe2O3 and V2O5) and sulfides (CuS). The coatings are stepwise obtained in successive spray pyrolysis depositions, using inorganic precursors. The composite layers have good crystallinity degree and develop various morphologies, with very different matrix- pigment infiltration; the addition of gold nanoparticles differently influences the properties, depending on the interactions with the precursor species: it can strongly decrease the thermal emittance, when embedded in the layers structure (Fe2O3) or it can form large aggregates on the matrix (V2O5) without significant effect on the optical properties. Bright red spectral selective coatings, with spectral selectivity of 12 were obtained using Fe2O3 hematite pigments.

Anca Duta; Luminita Isac; Andrea Milea; Elena Ienei; Dana Perniu

2014-01-01T23:59:59.000Z

471

Numerical Study of a Propagating Non-Thermal Microwave Feature in a Solar Flare Loop  

E-Print Network [OSTI]

We analytically and numerically study the motion of electrons along a magnetic loop, to compare with the observation of the propagating feature of the non-thermal microwave source in the 1999 August 28 solar flare reported by Yokoyama et al. (2002). We model the electron motion with the Fokker-Planck equation and calculate the spatial distribution of the gyrosynchrotron radiation. We find that the microwave propagating feature does not correspond to the motion of electrons with a specific initial pitch angle. This apparent propagating feature is a consequence of the motion of an ensemble of electrons with different initial pitch angles, which have different time and position to produce strong radiation in the loop. We conclude that the non-thermal electrons in the 1999 August 28 flare were isotropically accelerated and then are injected into the loop.

T. Minoshima; T. Yokoyama

2008-06-02T23:59:59.000Z

472

Performance prediction of a solar thermal energy system using artificial neural networks  

Science Journals Connector (OSTI)

Abstract This paper describes in details an application of artificial neural networks (ANNs) to predict the performance of a solar thermal energy system (STES) used for domestic hot water and space heating application. Experiments were conducted on the STES under a broad range of operating conditions during different seasons and Canadian weather conditions in Ottawa, over the period of March 2011 through December 2012 to assess the system performance. These experimental data were utilised for training, validating and testing the proposed ANN model. The model was applied to predict various performance parameters of the system, namely the preheat tank stratification temperatures, the heat input from the solar collectors to the heat exchanger, the heat input to the auxiliary propane-fired tank, and the derived solar fractions. The back-propagation learning algorithm with two different variants, the Levenberg–Marguardt (LM) and scaled conjugate gradient (SCG) algorithms were used in the network. It was found that the optimal algorithm and topology were the LM and the configuration with 10 inputs, 20 hidden and 8 output neurons/outputs, respectively. The preheat tank temperature and solar fraction predictions agreed very well with the experimental values using the testing data sets. The \\{ANNs\\} predicted the preheat water tank stratification temperatures and the solar fractions of the STES within less that ±3% and ±10% errors, respectively. The results confirmed the effectiveness of this method and provided very good accuracy even when the input data are distorted with different levels of noise. Moreover, the results of this study demonstrate that the ANN approach can provide high accuracy and reliability for predicting the performance of complex energy systems such as the one under investigation. Finally, this method can also be exploited as an effective tool to develop applications for predictive performance monitoring system, condition monitoring, fault detection and diagnosis of STES.

Wahiba Yaïci; Evgueniy Entchev

2014-01-01T23:59:59.000Z

473

Brayton-Cycle Baseload Power Tower CSP System  

SciTech Connect (OSTI)

The primary objectives of Phase 2 of this Project were: 1. Engineer, fabricate, and conduct preliminary testing on a low-pressure, air-heating solar receiver capable of powering a microturbine system to produce 300kWe while the sun is shining while simultaneously storing enough energy thermally to power the system for up to 13 hours thereafter. 2. Cycle-test a high-temperature super alloy, Haynes HR214, to determine its efficacy for the system’s high-temperature heat exchanger. 3. Engineer the thermal energy storage system This Phase 2 followed Wilson’s Phase 1, which primarily was an engineering feasibility study to determine a practical and innovative approach to a full Brayton-cycle system configuration that could meet DOE’s targets. Below is a summary table of the DOE targets with Wilson’s Phase 1 Project results. The results showed that a Brayton system with an innovative (low pressure) solar receiver with ~13 hours of dry (i.e., not phase change materials or molten salts but rather firebrick, stone, or ceramics) has the potential to meet or exceed DOE targets. Such systems would consist of pre-engineered, standardized, factory-produced modules to minimize on-site costs while driving down costs through mass production. System sizes most carefully analyzed were in the range of 300 kWe to 2 MWe. Such systems would also use off-the-shelf towers, blowers, piping, microturbine packages, and heliostats. Per DOE’s instructions, LCOEs are based on the elevation and DNI levels of Daggett, CA, for a 100 MWe power plant following 2 GWe of factory production of the various system components. Success criteria DOE targets Wilson system LCOE DOE’s gas price $6.75/MBtu 9 cents/kWh 7.7 cents/kWh LCOE Current gas price $4.71/MBtu NA 6.9 cents/kWh Capacity factor 75% (6500hr) 75-100% Solar fraction 85% (5585hr) >5585hr Receiver cost $170/kWe $50/kWe Thermal storage cost $20/kWhth $13/kWhth Heliostat cost $120/m2 $89.8/m2

Anderson, Bruce

2013-12-31T23:59:59.000Z

474

Integrated Modeling of Building Energy Requirements Incorporating Solar Assisted Cooling  

E-Print Network [OSTI]

current conditions solar thermal energy collection proves anenergy systems by the addition of active solar thermal

Firestone, Ryan; Marnay, Chris; Wang, Juan

2005-01-01T23:59:59.000Z

475

Improving Process Cooling Tower Eddiciency  

E-Print Network [OSTI]

of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 7 Improving Cooling Tower Efficiency ? Two Improvements in Capacity/Performance 1. Filtration for water quality control Side stream filtration Make up water quality...-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 2 Types of Cooling Towers Forced Draft Towers ESL-IE-13-05-08 Proceedings of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 3 Types...

Turpish, W.

2013-01-01T23:59:59.000Z

476

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

and Photovoltaic Solar Energy Converters,” American ChemicalNocera D. G. , 2010, “Solar Energy Supply and Storage forof Abiotic Photo-chemical Solar Energy Storage Systems,”

Coso, Dusan

2013-01-01T23:59:59.000Z

477

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

3 Fig. 1.2. Solar power plant operation [Materials for Concentrating Solar Power Plant Applications AMaterials for Concentrating Solar Power Plant Applications

Roshandell, Melina

2013-01-01T23:59:59.000Z

478

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Organometallic Frames for Solar Energy Storage, Berkeley. [Nocera D. G. , 2010, “Solar Energy Supply and Storage forof Abiotic Photo-chemical Solar Energy Storage Systems,”

Coso, Dusan

2013-01-01T23:59:59.000Z

479

E-Print Network 3.0 - active solar thermal Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

. ACTIVE SOLAR SYSTEMS Solar collectors are designed to take advan- tage of the greenhouse effect. The flat... " solar system (Figure 2). It is called active because it requires...

480

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Nocera D. G. , 2010, “Solar Energy Supply and Storage forof Abiotic Photo-chemical Solar Energy Storage Systems,”Power Plants,” Journal of Solar Energy Engineering, 124 (2),

Coso, Dusan

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tower solar thermal" 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.


481

Thermal performance analysis of a direct-expansion solar-assisted heat pump water heater  

Science Journals Connector (OSTI)

A direct-expansion solar-assisted heat pump water heater (DX-SAHPWH) is described, which can supply hot water for domestic use during the whole year. The system mainly employs a bare flat-plate collector/evaporator with a surface area of 4.2 m2, an electrical rotary-type hermetic compressor, a hot water tank with the volume of 150 L and a thermostatic expansion valve. R-22 is used as working fluid in the system. A simulation model based on lumped and distributed parameter approach is developed to predict the thermal performance of the system. Given the structure parameters, meteorological parameters, time step and final water temperature, the numerical model can output operational parameters, such as heat capacity, system COP and collector efficiency. Comparisons between the simulation results and the experimental measurements show that the model is able to give satisfactory predictions. The effect of various parameters, including solar radiation, ambient temperature, wind speed and compressor speed, has been analyzed on the thermal performance of the system.

X.Q. Kong; D. Zhang; Y. Li; Q.M. Yang

2011-01-01T23:59:59.000Z

482

Influence of Hydraulics and Control of Thermal Storage in Solar Assisted Heat Pump Combisystems  

Science Journals Connector (OSTI)

Abstract This paper studies the influence of hydraulics and control of thermal storage in systems combined with solar thermal and heat pump for the production of warm water and space heating in dwellings. A reference air source heat pump system with flat plate collectors connected to a combistore was defined and modeled together with the IEA SHC Task 44/HPP Annex 38 (T44A38) “Solar and Heat Pump Systems” boundary conditions of Strasbourg climate and SFH45 building. Three and four pipe connections as well as use of internal and external heat exchangers for DHW preparation were investigated as well as sensor height for charging of the DHW zone in the store. The temperature in this zone was varied to ensure the same DHW comfort was achieved in all cases. The results show that the four pipe connection results in 9% improvement in SPF compared to three pipe and that the external heat exchanger for DHW preparation leads to a 2% improvement compared to the reference case. Additionally the sensor height for charging the DHW zone of the store should not be too low, otherwise system performance is adversely affected.

Stefano Poppi; Chris Bales

2014-01-01T23:59:59.000Z

483

Chaotic mean wind in turbulent thermal convection and long-term correlations in solar activity  

E-Print Network [OSTI]

It is shown that correlation function of the mean wind velocity in a turbulent thermal convection (Rayleigh number $Ra \\sim 10^{11}$) exhibits exponential decay with a very long correlation time, while corresponding largest Lyapunov exponent is certainly positive. These results together with the reconstructed phase portrait indicate presence of a chaotic component in the examined mean wind. Telegraph approximation is also used to study relative contribution of the chaotic and stochastic components to the mean wind fluctuations and an equilibrium between these components has been studied. Since solar activity is based on the thermal convection processes, it is reasoned that the observed solar activity long-term correlations can be an imprint of the mean wind chaotic properties. In particular, correlation function of the daily sunspots number exhibits exponential decay with a very long correlation time and corresponding largest Lyapunov exponent is certainly positive, also relative contribution of the chaotic and stochastic components follows the same pattern as for the convection mean wind.

A. Bershadskii

2009-08-27T23:59:59.000Z

484

Economic analysis of community solar heating systems that use annual cycle thermal energy storage  

SciTech Connect (OSTI)

The economics of community-scale solar systems that incorporate a centralized annual cycle thermal energy storage (ACTES) coupled to a distribution system is examined. Systems were sized for three housing configurations: single-unit dwellings, 10-unit, and 200-unit apartment complexes in 50-, 200-, 400-, and 1000-unit communities in 10 geographic locations in the United States. Thermal energy is stored in large, constructed, underground tanks. Costs were assigned to each component of every system in order to allow calculation of total costs. Results are presented as normalized system costs per unit of heat delivered per building unit. These methods allow: (1) identification of the relative importance of each system component in the overall cost; and (2) identification of the key variables that determine the optimum sizing of a district solar heating system. In more northerly locations, collectors are a larger component of cost. In southern locations, distribution networks are a larger proportion of total cost. Larger, more compact buildings are, in general, less expensive to heat. For the two smaller-scale building configurations, a broad minima in total costs versus system size is often observed.

Baylin, F.; Monte, R.; Sillman, S.; Hooper, F.C.; McClenahan, J.D.

1981-02-01T23:59:59.000Z

485

Mechanism of Thermal Reversal of the (Fulvalene)tetracarbonyldiruthenium Photoisomerization: Toward Molecular Solar-Thermal Energy Storage  

SciTech Connect (OSTI)

In the currently intensifying quest to harness solar energy for the powering of our planet, most efforts are centered around photoinduced generic charge separation, such as in photovoltaics, water splitting, other small molecule activation, and biologically inspired photosynthetic systems. In contrast, direct collection of heat from sunlight has received much less diversified attention, its bulk devoted to the development of concentrating solar thermal power plants, in which mirrors are used to focus the sun beam on an appropriate heat transfer material. An attractive alternative strategy would be to trap solar energy in the form of chemical bonds, ideally through the photoconversion of a suitable molecule to a higher energy isomer, which, in turn, would release the stored energy by thermal reversal. Such a system would encompass the essential elements of a rechargeable heat battery, with its inherent advantages of storage, transportability, and use on demand. The underlying concept has been explored extensively with organic molecules (such as the norbornadiene-quadricyclane cycle), often in the context of developing photoswitches. On the other hand, organometallic complexes have remained relatively obscure in this capacity, despite a number of advantages, including expanded structural tunability and generally favorable electronic absorption regimes. A highly promising organometallic system is the previously reported, robust photo-thermal fulvalene (Fv) diruthenium couple 1 {l_reversible} 2 (Scheme 1). However, although reversible and moderately efficient, lack of a full, detailed atom-scale understanding of its key conversion and storage mechanisms have limited our ability to improve on its performance or identify optimal variants, such as substituents on the Fv, ligands other than CO, and alternative metals. Here we present a theoretical investigation, in conjunction with corroborating experiments, of the mechanism for the heat releasing step of 2 {yields} 1 and its Fe (4) and Os (6) relatives. The results of the combined study has enabled a rigorous interpretation of earlier and new experimental measurements and paint a surprising picture. First-principles calculations were employed based on spin unrestricted density functional theory (DFT) with a non-empirical gradient corrected exchange-correlation functional. Ultrasoft pseudopotentials were used to describe the valence-core interactions of electrons, including scalar relativistic effects of the core. Wavefunctions and charge densities were expanded in plane waves with kinetic energies up to 25 and 200 Rydberg, respectively. Reaction pathways were delineated with the string method, as implemented within the Car-Parrinello approach. This method allows for the efficient determination of the minimum energy path (MEP) of atomistic transitions and thus also saddle points (transition states, TSs), which are the energy maxima along the MEP. All geometries were optimized until all forces on the atoms were less than 0.02 eV/{angstrom}. The calculated structures of 1 and 2 were in good agreement with their experimental counterparts.

Kanai, Y; Srinivasan, V; Meier, S K; Vollhardt, K P; Grossman, J C

2010-02-18T23:59:59.000Z

486

Effect of nano-ZrO2 on microstructure and thermal shock behaviour of Al2O3/SiC composite ceramics used in solar thermal power  

Science Journals Connector (OSTI)

The Al2O3-ZrO2(3Y)-SiC composite ceramics used in solar thermal power were prepared by micrometric Al2O3, nano-ZrO2 and SiC powders under the condition of pressureless sintering. The bulk density and bending stre...

Xiaohong Xu ???; Guohao Jiao; Jianfeng Wu…

2011-04-01T23:59:59.000Z

487

Modelling Concentrating Solar Power with Thermal Energy Storage for Integration Studies (Presentation)  

SciTech Connect (OSTI)

Concentrating solar power with thermal energy storage (CSP-TES) can provide multiple benefits to the grid, including low marginal cost energy and the ability to levelize load, provide operating reserves, and provide firm capacity. It is challenging to properly value the integration of CSP because of the complicated nature of this technology. Unlike completely dispatchable fossil sources, CSP is a limited energy resource, depending on the hourly and daily supply of solar energy. To optimize the use of this limited energy, CSP-TES must be implemented in a production cost model with multiple decision variables for the operation of the CSP-TES plant. We develop and implement a CSP-TES plant in a production cost model that accurately characterizes the three main components of the plant: solar field, storage tank, and power block. We show the effect of various modelling simplifications on the value of CSP, including: scheduled versus optimized dispatch from the storage tank and energy-only operation versus co-optimization with ancillary services.

Hummon, M.; Jorgenson, J.; Denholm, P.; Mehos, M.

2013-10-01T23:59:59.000Z

488

Modelling Concentrating Solar Power with Thermal Energy Storage for Integration Studies: Preprint  

SciTech Connect (OSTI)

Concentrating solar power with thermal energy storage (CSP-TES) can provide multiple benefits to the grid, including low marginal cost energy and the ability to levelize load, provide operating reserves, and provide firm capacity. It is challenging to properly value the integration of CSP because of the complicated nature of this technology. Unlike completely dispatchable fossil sources, CSP is a limited energy resource, depending on the hourly and daily supply of solar energy. To optimize the use of this limited energy, CSP-TES must be implemented in a production cost model with multiple decision variables for the operation of the CSP-TES plant. We develop and implement a CSP-TES plant in a production cost model that accurately characterizes the three main components of the plant: solar field, storage tank, and power block. We show the effect of various modelling simplifications on the value of CSP, including: scheduled versus optimized dispatch from the storage tank and energy-only operation versus co-optimization with ancillary services.

Hummon, M.; Denholm, P.; Jorgenson, J.; Mehos, M.

2013-10-01T23:59:59.000Z

489

NREL: Concentrating Solar Power Research Home Page  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A collage of Concentrating Solar Power photographs. The first photo shows a dish-engine solar system. The second is of a SAIC Stirling dish collector. And the third photo shows a SkyTrough solar concentrator located on a mesa top. A collage of Concentrating Solar Power photographs. The first photo shows a dish-engine solar system. The second is of a SAIC Stirling dish collector. And the third photo shows a SkyTrough solar concentrator located on a mesa top. NREL collaborates with industry to further the research and development (R&D) of concentrating solar power (CSP) plant and solar thermal technologies. NREL's projects in concentrating solar power focus on components R&D and systems analysis related to power tower and parabolic trough technologies: Collectors Receivers Power block Thermal energy storage Analysis. In addition, NREL has received funding through the following competitively awarded projects: 10-megawatt supercritical carbon dioxide (s-CO2) turbine test Near-blackbody, enclosed-particle receiver integrated with a

490

Cooling Tower Inspection with Scuba  

E-Print Network [OSTI]

A serious problem of scale and other solid material settling in heat transfer equipment was threatening to shut down our ethylene plant. All evidence pointed to the cooling tower as the source of the contamination. Visual inspection of the cooling...

Brenner, W.

1982-01-01T23:59:59.000Z

491

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

for evening cooking in a solar cooker. Energy Convers Manageperformance of a solar cooker based on an evacuated tube

Roshandell, Melina

2013-01-01T23:59:59.000Z

492

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

493

Transition Region Emission and Energy Input to Thermal Plasma during the Impulsive Phase of Solar Flares  

Science Journals Connector (OSTI)

The energy released in a solar flare is partitioned between thermal and nonthermal particle energy and lost to thermal conduction and radiation over a broad range of wavelengths. It is difficult to determine the conductive losses and the energy radiated at transition region temperatures during the impulsive phases of flares. We use UVCS measurements of O VI photons produced by five flares and subsequently scattered by O VI ions in the corona to determine the 5.0 ? log T ? 6.0 transition region luminosities. We compare them with the rates of increase of thermal energy and the conductive losses deduced from RHESSI and GOES X-ray data using areas from RHESSI images to estimate the loop volumes, cross-sectional areas, and scale lengths. The transition region luminosities during the impulsive phase exceed the X-ray luminosities for the first few minutes, but they are smaller than the rates of increase of thermal energy unless the filling factor of the X-ray-emitting gas is ~0.01. The estimated conductive losses from the hot gas are too large to be balanced by radiative losses or heating of evaporated plasma, and we conclude that the area of the flare magnetic flux tubes is much smaller than the effective area measured by RHESSI during this phase of the flares. For the 2002 July 23 flare, the energy deposited by nonthermal particles exceeds the energy radiated in X-rays, the energy radiated at transition region temperatures, and the rate of increase of the thermal energy.

John C. Raymond; Gordon Holman; A. Ciaravella; A. Panasyuk; Y.-K. Ko; J. Kohl

2007-01-01T23:59:59.000Z

494

PERFORMANCE OF AN EXPERIMENTAL SOLAR-DRIVEN ABSORPTION AIR CONDITIONER--ANNUAL REPORT JULY 1975-SEPT. 1976  

E-Print Network [OSTI]

solar collectors almost certainly reqld res evaporat 1ve coo 1 i ng towers,tower for water- cooling the condenser was an overriding concern in development of a practical solar

Dao, K.

2010-01-01T23:59:59.000Z

495

Solar Compartment Design Methods, Performance Analysis and Thermal Data for Solar Composting Latrines: A Full Scale Experimental Study  

E-Print Network [OSTI]

. Pathogen resistance to disinfection or inactivation in latrines is multifaceted. The full-scale solar composting compartment studies at the University of Kansas have advanced the knowledge about feces composting in solar compartments based on climate...

Rendall, Joseph D.

2012-12-31T23:59:59.000Z

496

Effect of simultaneous electrical and thermal treatment on the performance of bulk heterojunction organic solar cell blended with organic salt  

SciTech Connect (OSTI)

This work presents the influence of simultaneous electrical and thermal treatment on the performance of organic solar cell blended with organic salt. The organic solar cells were composed of indium tin oxide as anode, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene]: (6,6)-phenyl-C61 butyric acid methyl ester: tetrabutylammonium hexafluorophosphate blend as organic active layer and aluminium as cathode. The devices underwent a simultaneous fixed-voltage electrical and thermal treatment at different temperatures of 25, 50 and 75 °C. It was found that photovoltaic performance improved with the thermal treatment temperature. Accumulation of more organic salt ions in the active layer leads to broadening of p-n doped regions and hence higher built-in electric field across thin intrinsic layer. The simultaneous electrical and thermal treatment has been shown to be able to reduce the electrical treatment voltage.

Sabri, Nasehah Syamin; Yap, Chi Chin; Yahaya, Muhammad [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia); Salleh, Muhamad Mat [Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia)

2013-11-27T23:59:59.000Z

497

Novel integration options of concentrating solar thermal technology with fossil-fuelled and CO2 capture processes  

Science Journals Connector (OSTI)

Concentrating solar thermal (CST) technology has been commercially proven in utility-scale power plants that have been in operation since the 1980’s. CST uses reflecting surfaces to focus solar energy onto collectors, generating extreme heat than can be used for a variety of purposes. The current focus of CST is large-scale electrical power generation. However, new applications, such as solar fuels, are quickly gaining momentum. One key shortcoming of CST technology is its sensitivity to disruptions in sunlight availability over time. CST systems require either thermal energy storage or backup systems to operate during heavy cloud periods or at night. On the other hand, fossil-based energy systems have high availability and reliability, but they generate substantial CO2 emissions compared to equivalent CST processes. A novel solution would combine the benefits of CST technology and of fossil-fueled energy systems. Such a solar-fossil hybrid system would guarantee energy availability in the absence of sunlight or stored solar energy. The addition of carbon capture to these systems could reduce their carbon intensity to almost zero. This paper introduces three important solar-fossil hybrid energy systems: (1) Integrated Solar Combined Cycle (ISCC), (2) Solar-assisted post-combustion capture (SAPCAP), and (3) Solar gasification with CO2 capture. These novel concepts have great potential to overcome the inherent limitations of their component technologies and to achieve superior greenhouse gas mitigation techno-economic performance in large-scale applications. The paper describes the features of the three solar-fossil hybrid systems described earlier, discusses its advantages and disadvantages, and provides examples of applications. The goal of this manuscript is to introduce experts in the CCS and CST fields to the opportunities of integration between these technologies and their potential benefits.

Guillermo Ordorica-Garcia; and Alfonso Vidal Delgado; Aranzazu Fernandez Garcia

2011-01-01T23:59:59.000Z

498

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

heat source can be solar thermal energy, biological thermaland concentrated solar thermal energy farms. They demandsources include solar thermal energy, geo-thermal energy,

Lim, Hyuck

2011-01-01T23:59:59.000Z

499

Investigations to convert CO2, NaCl and H2O into Na2CO3 and \\{HCl\\} by thermal solar energy with high solar efficiency  

Science Journals Connector (OSTI)

Abstract Exhaust CO2, NaCl and H2O can be converted to Na2CO3 and \\{HCl\\} by the MgCl2/MgO modified ammonia soda process at a maximum temperature of 525 °C. Such a temperature is easily reached by solar troughs. Subsequently this process stores thermal solar energy as chemical energy and concomitantly CO2 can be removed from the environment. The process has been investigated theoretically and experimentally to further enhance its solar efficiency. It is shown theoretically that Mg-compounds are unique for this process and that the MgCl2/MgO modification is optimal. Experiments demonstrate that by splitting the main reaction of this process into two steps the solar efficiency can be enhanced to 21.5% and very highly concentrated \\{HClaq\\} can be obtained. The yield of the main chemical reaction exceeds 95% at 525 °C. Suggestions are given for an improved thermal solar trough system to perform the main chemical reaction.

Martin Forster

2014-01-01T23:59:59.000Z

500

CALIFORNIA SOLAR DATA MANUAL  

E-Print Network [OSTI]

and William A. Beckman, Solar Energy Thermal Processes (JohnWiley, Inc" New York. Solar Energy Thermal Processes. John1977): SOLCOST, Solar Energy Design Program for Non-Thermal

Berdahl, P.

2010-01-01T23:59:59.000Z