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

Hydrogen Storage in Wind Turbine Towers: Cost Analysis and Conceptual...  

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

in Wind Turbine Towers: Cost Analysis and Conceptual Design Hydrogen Storage in Wind Turbine Towers: Cost Analysis and Conceptual Design Preprint 34851.pdf More Documents &...

2

AQUIFER THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

using aquifers for thermal energy storage. Problems outlinedmatical Modeling of Thermal Energy Storage in Aquifers,"ings of Aquifer Thermal Energy Storage Workshop, Lawrence

Tsang, C.-F.

2011-01-01T23:59:59.000Z

3

AQUIFER THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

aquifers for thermal energy storage. Problems outlined aboveModeling of Thermal Energy Storage in Aquifers," Proceed-ings of Aquifer Thermal Energy Storage Workshop, Lawrence

Tsang, C.-F.

2011-01-01T23:59:59.000Z

4

AQUIFER THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

using aquifers for thermal energy storage. Problems outlinedmatical Modeling of Thermal Energy Storage in Aquifers,"Proceed- ings of Aquifer Thermal Energy Storage Workshop,

Tsang, C.-F.

2011-01-01T23:59:59.000Z

5

Seasonal thermal energy storage  

SciTech Connect (OSTI)

This report describes the following: (1) the US Department of Energy Seasonal Thermal Energy Storage Program, (2) aquifer thermal energy storage technology, (3) alternative STES technology, (4) foreign studies in seasonal thermal energy storage, and (5) economic assessment.

Allen, R.D.; Kannberg, L.D.; Raymond, J.R.

1984-05-01T23:59:59.000Z

6

HEATS: Thermal Energy Storage  

SciTech Connect (OSTI)

HEATS Project: The 15 projects that make up ARPA-E’s HEATS program, short for “High Energy Advanced Thermal Storage,” seek to develop revolutionary, cost-effective ways to store thermal energy. HEATS focuses on 3 specific areas: 1) developing high-temperature solar thermal energy storage capable of cost-effectively delivering electricity around the clock and thermal energy storage for nuclear power plants capable of cost-effectively meeting peak demand, 2) creating synthetic fuel efficiently from sunlight by converting sunlight into heat, and 3) using thermal energy storage to improve the driving range of electric vehicles (EVs) and also enable thermal management of internal combustion engine vehicles.

None

2012-01-01T23:59:59.000Z

7

AQUIFER THERMAL ENERGY STORAGE-A SURVEY  

E-Print Network [OSTI]

High temperature underground thermal energy storage, inProceedings, Thermal Energy Storage in Aquifers Workshop:underground thermal energy storage, in ATES newsletter:

Tsang, Chin Fu

2012-01-01T23:59:59.000Z

8

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

Survey of Thermal Energy Storage in Aquifers Coupled withconcept of thermal energy storage in aquifers was suggestedLow Temperature Thermal Energy Storage Program of Oak Ridge

Authors, Various

2011-01-01T23:59:59.000Z

9

AQUIFER THERMAL ENERGY STORAGE-A SURVEY  

E-Print Network [OSTI]

1978, High temperature underground thermal energy storage,in Proceedings, Thermal Energy Storage in Aquifers Workshop:High temperature underground thermal energy storage, in ATES

Tsang, Chin Fu

2012-01-01T23:59:59.000Z

10

Article for thermal energy storage  

DOE Patents [OSTI]

A thermal energy storage composition is provided which is in the form of a gel. The composition includes a phase change material and silica particles, where the phase change material may comprise a linear alkyl hydrocarbon, water/urea, or water. The thermal energy storage composition has a high thermal conductivity, high thermal energy storage, and may be used in a variety of applications such as in thermal shipping containers and gel packs.

Salyer, Ival O. (Dayton, OH)

2000-06-27T23:59:59.000Z

11

Systems analysis of thermal storage  

SciTech Connect (OSTI)

During FY 1981, analyses were conducted on thermal storage concepts for solar thermal applications. These studies include estimates of both the obtainable costs of thermal storage concepts and their worth to a user (i.e., value). Based on obtainable costs and performance, an in-depth study evaluated thermal storage concepts for water/steam, organic fluid, and gas/Brayton solar thermal receivers. Promising and nonpromising concepts were identified. A study to evaluate thermal storage concepts for a liquid metal receiver was initiated. The value of thermal storage in a solar thermal industrial process heat application was analyzed. Several advanced concepts are being studied, including ground-mounted thermal storage for parabolic dishes with Stirling engines.

Copeland, R.J.

1981-08-01T23:59:59.000Z

12

AQUIFER THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

of Discharge Using Ground- Water Storage," Transactions1971. "Storage of Solar Energy in a Sandy-Gravel Ground,"

Tsang, C.-F.

2011-01-01T23:59:59.000Z

13

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

14

Systems analysis of thermal storage  

SciTech Connect (OSTI)

During FY80 analyses were conducted on thermal storage concepts for solar thermal applications. These studies include both estimates of the obtainable costs of thermal storage concepts and their worth to a user (i.e., value). Based on obtainable costs and performance, promising thermal storage concepts are being identified. A preliminary screening was completed in FY80 and a more in-depth study was initiated. Value studies are being conducted to establish cost goals. A ranking of storage concepts based on value in solar thermal electric plants was conducted for both diurnal and long duration applications. Ground mounted thermal storage concepts for a parabolic dish/Stirling systtem are also being evaluated.

Copeland, R. J.

1980-08-01T23:59:59.000Z

15

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

and J. Schwarz, Survey of Thermal Energy Storage in AquifersLow Temperature Thermal Energy Storage Program of Oak RidgeAquifers for Seasonal Thermal Energy Storage: An Overview of

Authors, Various

2011-01-01T23:59:59.000Z

16

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

and J. Schwarz, Survey of Thermal Energy Storage in AquifersB. Quale. Seasonal storage of thermal energy in water in theSecond Annual Thermal Energy Storage Contractors'

Authors, Various

2011-01-01T23:59:59.000Z

17

Lih thermal energy storage device  

DOE Patents [OSTI]

A thermal energy storage device for use in a pulsed power supply to store waste heat produced in a high-power burst operation utilizes lithium hydride as the phase change thermal energy storage material. The device includes an outer container encapsulating the lithium hydride and an inner container supporting a hydrogen sorbing sponge material such as activated carbon. The inner container is in communication with the interior of the outer container to receive hydrogen dissociated from the lithium hydride at elevated temperatures.

Olszewski, Mitchell (Knoxville, TN); Morris, David G. (Knoxville, TN)

1994-01-01T23:59:59.000Z

18

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

19

Concentrating Solar Program; Session: Thermal Storage - Overview (Presentation)  

SciTech Connect (OSTI)

The project overview of this presentation is: (1) description--(a) laboratory R and D in advanced heat transfer fluids (HTF) and thermal storage systems; (b) FOA activities in solar collector and component development for use of molten salt as a heat transfer and storage fluid; (c) applications for all activities include line focus and point focus solar concentrating technologies; (2) Major FY08 Activities--(a) advanced HTF development with novel molten salt compositions with low freezing temperatures, nanofluids molecular modeling and experimental studies, and use with molten salt HTF in solar collector field; (b) thermal storage systems--cost analysis and updates for 2-tank and thermocline storage and model development and analysis to support near-term trought deployment; (c) thermal storage components--facility upgrade to support molten salt component testing for freeze-thaw receiver testing, long-shafted molten salt pump for parabolic trough and power tower thermal storage systems; (d) CSP FOA support--testing and evaluation support for molten salt component and field testing work, advanced fluids and storage solicitation preparation, and proposal evaluation for new advanced HTF and thermal storage FOA.

Glatzmaier, G.; Mehos, M.; Mancini, T.

2008-04-01T23:59:59.000Z

20

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

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

Thermal Energy Storage Potential in Supermarkets.  

E-Print Network [OSTI]

?? The objective of this research is to evaluate the potential of thermal energy storage in supermarkets with CO2 refrigeration systems. Suitable energy storage techniques… (more)

Ohannessian, Roupen

2014-01-01T23:59:59.000Z

22

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

23

Thermal Energy Storage for Cooling of Commercial Buildings  

E-Print Network [OSTI]

of Commercial Building Thermal Energy _Storage in ASEANGas Electric Company, "Thermal Energy Storage for Cooling,"LBL--25393 DE91 ,THERMAL ENERGY STORAGE FOR COOLING OF

Akbari, H.

2010-01-01T23:59:59.000Z

24

Thermal Energy Storage for Cooling of Commercial Buildings  

E-Print Network [OSTI]

Building Thermal Energy _Storage in ASEAN Countries,"Company, "Thermal Energy Storage for Cooling," SeminarTHERMAL FOR COOLING ENERGY STORAGE BUILDINGS OF COMMERCIAL

Akbari, H.

2010-01-01T23:59:59.000Z

25

AQUIFER THERMAL ENERGY STORAGE-A SURVEY  

E-Print Network [OSTI]

solid-fluid heat storage systems in the ground; extractions0 Thermal storage of cold water in ground water aquifers forA. 8 1971, Storage of solar energy in a sandy-gravel ground:

Tsang, Chin Fu

2012-01-01T23:59:59.000Z

26

Successfully Marketing Thermal Storage in Commercial Buildings  

E-Print Network [OSTI]

This paper first reviews the key hurdles to thermal energy storage. Next, case studies of three electric utility thermal storage marketing programs are reviewed. The results of these case studies. as well as advice and experiences from other...

McDonald, C.

1988-01-01T23:59:59.000Z

27

Thermal Storage Options for HVAC Systems  

E-Print Network [OSTI]

THERMAL STORAGE OPTIONS FOR HVAC SYSTEMS B. N. Gidwani, P.E. Roy F. Weston, Inc. West Chester, Pennsylvania ABSTRACT With the ever-increasing cost of electricity and the high demand charges levied by utility compa nies, thermal storage... for cooling is rapidly becom ing a widely recognized method to lower cooling costs. There are three maior types of thermal stor age systems: ? Ice Storage: This utilizes the latent heat of fusion of ice for thermal storage. During off Deak periods...

Weston, R. F.; Gidwani, B. N.

28

Microwavable thermal energy storage material  

DOE Patents [OSTI]

A microwavable thermal energy storage material is provided which includes a mixture of a phase change material and silica, and a carbon black additive in the form of a conformable dry powder of phase change material/silica/carbon black, or solid pellets, films, fibers, moldings or strands of phase change material/high density polyethylene/ethylene-vinyl acetate/silica/carbon black which allows the phase change material to be rapidly heated in a microwave oven. The carbon black additive, which is preferably an electrically conductive carbon black, may be added in low concentrations of from 0.5 to 15% by weight, and may be used to tailor the heating times of the phase change material as desired. The microwavable thermal energy storage material can be used in food serving applications such as tableware items or pizza warmers, and in medical wraps and garments.

Salyer, Ival O. (Dayton, OH)

1998-09-08T23:59:59.000Z

29

Microwavable thermal energy storage material  

DOE Patents [OSTI]

A microwavable thermal energy storage material is provided which includes a mixture of a phase change material and silica, and a carbon black additive in the form of a conformable dry powder of phase change material/silica/carbon black, or solid pellets, films, fibers, moldings or strands of phase change material/high density polyethylene/ethylene vinyl acetate/silica/carbon black which allows the phase change material to be rapidly heated in a microwave oven. The carbon black additive, which is preferably an electrically conductive carbon black, may be added in low concentrations of from 0.5 to 15% by weight, and may be used to tailor the heating times of the phase change material as desired. The microwavable thermal energy storage material can be used in food serving applications such as tableware items or pizza warmers, and in medical wraps and garments. 3 figs.

Salyer, I.O.

1998-09-08T23:59:59.000Z

30

Electric thermal storage demonstration program  

SciTech Connect (OSTI)

In early 1989, MMWEC, a joint action agency comprised of 30 municipal light departments in Massachusetts and one affiliate in Rhode Island, responded to a Department of Energy request to proposal for the Least Cost Utility Planning program. The MMWEC submission was for the development of a program, focused on small rural electric utilities, to promote the use of electric thermal storage heating systems in residential applications. In this progress report, cost savings at Bolyston light department is discussed. (JL)

Not Available

1992-02-01T23:59:59.000Z

31

Electric thermal storage demonstration program  

SciTech Connect (OSTI)

In early 1989, MMWEC, a joint action agency comprised of 30 municipal light departments in Massachusetts and one affiliate in Rhode Island, responded to a Department of Energy request to proposal for the Least Cost Utility Planning program. The MMWEC submission was for the development of a program, focused on small rural electric utilities, to promote the use of electric thermal storage heating systems in residential applications. In this progress report, cost savings at Bolyston light department is discussed. (JL)

Not Available

1992-01-01T23:59:59.000Z

32

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

33

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

34

Thermal Storage with Ice Harvesting Systems  

E-Print Network [OSTI]

Application of Harvesting Ice Storage Systems. Thermal storage systems are becoming widely accepted techniques for utility load management. This paper discusses the principles of ice harvesting equipment and their application to the multi...

Knebel, D. E.

1986-01-01T23:59:59.000Z

35

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

Key to Large-Scale Cogeneration?" Public Power, v, 35, no.Thermal Energy Storage for Cogeneration and Solar Systems,"Energy Storage for Cogeneration and Solar Systems, tion from

Authors, Various

2011-01-01T23:59:59.000Z

36

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

37

PCM energy storage during defective thermal cycling:.  

E-Print Network [OSTI]

??Incomplete thermal cycling affects storage capacities of phase change materials (PCMs). Existing PCM measuring methods are presented with their drawbacks. A new device named “the… (more)

Koekenbier, S.F.

2011-01-01T23:59:59.000Z

38

Thermal Energy Storage:Analysis and Application.  

E-Print Network [OSTI]

??The purpose of this paper is to analyze and determine the feasibility of a cold thermal storage system in manufacturing Industries. Cooling loads and actual… (more)

Ogunkoya, Dolanimi Olugbenga

2009-01-01T23:59:59.000Z

39

EXPERIMENTAL AND THEORETICAL STUDIES OF THERMAL ENERGY STORAGE IN AQUIFERS  

E-Print Network [OSTI]

In Proceed- ings of Thermal Energy Storage in Aquifers Work-Mathematical Modeling of Thermal Energy storage in Aquifers.In Proceed- ings of Thermal Energy Storage in Aquifers Work-

Tsang, Chin Fu

2011-01-01T23:59:59.000Z

40

EXPERIMENTAL AND THEORETICAL STUDIES OF THERMAL ENERGY STORAGE IN AQUIFERS  

E-Print Network [OSTI]

Department of Energy, Energy Storage Division through thegeneration and energy storage, Presented at Frontiers ofIn Proceed- ings of Thermal Energy Storage in Aquifers Work-

Tsang, Chin Fu

2011-01-01T23:59:59.000Z

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

Project Profile: Reducing the Cost of Thermal Energy Storage...  

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

Reducing the Cost of Thermal Energy Storage for Parabolic Trough Solar Power Plants Project Profile: Reducing the Cost of Thermal Energy Storage for Parabolic Trough Solar Power...

42

Project Profile: Degradation Mechanisms for Thermal Energy Storage...  

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

Degradation Mechanisms for Thermal Energy Storage and Heat Transfer Fluid Containment Materials Project Profile: Degradation Mechanisms for Thermal Energy Storage and Heat Transfer...

43

Project Profile: Innovative Phase Change Thermal Energy Storage...  

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

Phase Change Thermal Energy Storage Solution for Baseload Power Project Profile: Innovative Phase Change Thermal Energy Storage Solution for Baseload Power Infinia logo Infinia,...

44

Project Profile: Innovative Thermal Energy Storage for Baseload...  

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

Thermal Energy Storage for Baseload Solar Power Generation Project Profile: Innovative Thermal Energy Storage for Baseload Solar Power Generation University of South Florida logo...

45

Thermal Storage with Conventional Cooling Systems  

E-Print Network [OSTI]

The newly opened Pennsylvania Convention Center in Philadelphia, PA; Exxon's Computer Facility at Florham Park, NJ; The Center Square Building in Philadelphia, are success stories for demand shifting through thermal storage. These buildings employ a...

Kieninger, R. T.

1994-01-01T23:59:59.000Z

46

Thermal Energy Storage for Vacuum Precoolers  

E-Print Network [OSTI]

radically creating high peak demands and low load factors. An ice bank thermal energy storage (TES) and ice water vapor condenser were installed. The existing equipment and TES system were computer monitored to determine energy consumption and potential... efficiency at night. The ice bank thermal energy storage system has a 4.4 year simple payback. While building ice, the refrigeration system operated at a 6.26 Coefficient of Performance (COP). The refrigeration system operated more efficiently at night...

Nugent, D. M.

47

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

48

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

49

Aquifer thermal energy (heat and chill) storage  

SciTech Connect (OSTI)

As part of the 1992 Intersociety Conversion Engineering Conference, held in San Diego, California, August 3--7, 1992, the Seasonal Thermal Energy Storage Program coordinated five sessions dealing specifically with aquifer thermal energy storage technologies (ATES). Researchers from Sweden, The Netherlands, Germany, Switzerland, Denmark, Canada, and the United States presented papers on a variety of ATES related topics. With special permission from the Society of Automotive Engineers, host society for the 1992 IECEC, these papers are being republished here as a standalone summary of ATES technology status. Individual papers are indexed separately.

Jenne, E.A. (ed.)

1992-11-01T23:59:59.000Z

50

LiH thermal energy storage device  

DOE Patents [OSTI]

A thermal energy storage device for use in a pulsed power supply to store waste heat produced in a high-power burst operation utilizes lithium hydride as the phase change thermal energy storage material. The device includes an outer container encapsulating the lithium hydride and an inner container supporting a hydrogen sorbing sponge material such as activated carbon. The inner container is in communication with the interior of the outer container to receive hydrogen dissociated from the lithium hydride at elevated temperatures. 5 figures.

Olszewski, M.; Morris, D.G.

1994-06-28T23:59:59.000Z

51

Thermal Storage Materials Laboratory (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes the purpose, lab specifications, applications scenarios, and information on how to partner with NREL's Thermal Storage Materials Laboratory at the Energy Systems Integration Facility. The Thermal Storage Materials Laboratory at NREL's Energy Systems Integration Facility (ESIF) investigates materials that can be used as high-temperature heat transfer fluids or thermal energy storage media in concentrating solar power (CSP) plants. Research objectives include the discovery and evaluation of candidate fluids and phase-change materials (PCM) to serve as thermal energy storage media in the temperature range of 300 C to 800 C. Knowledge of thermophysical properties such as melting point, heat of fusion, density, viscosity, thermal stability are essential for understanding how candidate materials could be deployed in CSP plants. The laboratory runs high-temperature instruments for the analysis of thermophysical properties. Small samples of candidate materials are prepared and characterized using differential scanning calorimetry, thermogravimetric analysis, and other specialized analytical methods. Instrumentation capabilities are being expanded to allow for analysis of samples up to 1,200 C. Higher temperature operation is one method to increase the efficiency and lower the cost of CSP systems.

Not Available

2011-10-01T23:59:59.000Z

52

Advanced Heat Transfer Fluids and Novel Thermal Storage Concepts...  

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

Systems Lehigh University: Novel Thermal Storage Technologies for Concentrating Solar Power Generation Terrafore: Heat Transfer and Latent Heat Storage in Inorganic Molten...

53

Macroencapsulation of Phase Change Materials for Thermal Energy Storage.  

E-Print Network [OSTI]

??The use of a latent heat storage system using phase change materials (PCMs) is an effective way of storing thermal energy. Latent heat storage enables… (more)

Pendyala, Swetha

2012-01-01T23:59:59.000Z

54

Thermal Energy Storage Technology for Transportation and Other...  

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

Energy Storage Technology for Transportation and Other Applications D. Bank, M. Maurer, J. Penkala, K. Sehanobish, A. Soukhojak Thermal Energy Storage Technology for Transportation...

55

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

56

Cost-Effective Solar Thermal Energy Storage: Thermal Energy Storage With Supercritical Fluids  

SciTech Connect (OSTI)

Broad Funding Opportunity Announcement Project: UCLA and JPL are creating cost-effective storage systems for solar thermal energy using new materials and designs. A major drawback to the widespread use of solar thermal energy is its inability to cost-effectively supply electric power at night. State-of-the-art energy storage for solar thermal power plants uses molten salt to help store thermal energy. Molten salt systems can be expensive and complex, which is not attractive from a long-term investment standpoint. UCLA and JPL are developing a supercritical fluid-based thermal energy storage system, which would be much less expensive than molten-salt-based systems. The team’s design also uses a smaller, modular, single-tank design that is more reliable and scalable for large-scale storage applications.

None

2011-02-01T23:59:59.000Z

57

Molten Glass for Thermal Storage: Advanced Molten Glass for Heat Transfer and Thermal Energy Storage  

SciTech Connect (OSTI)

HEATS Project: Halotechnics is developing a high-temperature thermal energy storage system using a new thermal-storage and heat-transfer material: earth-abundant and low-melting-point molten glass. Heat storage materials are critical to the energy storage process. In solar thermal storage systems, heat can be stored in these materials during the day and released at night—when the sun is not out—to drive a turbine and produce electricity. In nuclear storage systems, heat can be stored in these materials at night and released to produce electricity during daytime peak-demand hours. Halotechnics new thermal storage material targets a price that is potentially cheaper than the molten salt used in most commercial solar thermal storage systems today. It is also extremely stable at temperatures up to 1200°C—hundreds of degrees hotter than the highest temperature molten salt can handle. Being able to function at high temperatures will significantly increase the efficiency of turning heat into electricity. Halotechnics is developing a scalable system to pump, heat, store, and discharge the molten glass. The company is leveraging technology used in the modern glass industry, which has decades of experience handling molten glass.

None

2012-01-01T23:59:59.000Z

58

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

E-Print Network [OSTI]

UNIVERSITY OF CALIFORNIA RIVERSIDE Phase Change Materials for Thermal Energy Storage in Concentrated Solar

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

59

AQUIFER THERMAL ENERGY STORAGE. A NUMERICAL SIMULATION OF AUBURN UNIVERSITY FIELD EXPERIMENTS  

E-Print Network [OSTI]

Auburn University Thermal Energy Storage , LBL No. 10194.Mathematical modeling of thermal energy storage in aquifers,of Current Aquifer Thermal Energy Storage Programs (in

Tsang, Chin Fu

2013-01-01T23:59:59.000Z

60

Optimal Deployment of Thermal Energy Storage under Diverse Economic and Climate Conditions  

E-Print Network [OSTI]

Deployment  of  Thermal  Energy   Storage  under  Diverse  Dincer I. On thermal energy storage systems and applicationsin research on cold thermal energy storage, International

DeForest, Nicolas

2014-01-01T23:59:59.000Z

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

Modeling of Thermal Storage Systems in MILP Distributed Energy Resource Models  

E-Print Network [OSTI]

potential materials for thermal energy storage in buildingcoupled with thermal energy storage," Applied Energy, vol.N. Fumo, "Benefits of thermal energy storage option combined

Steen, David

2014-01-01T23:59:59.000Z

62

THEORETICAL STUDIES IN LONG-TERM THERMAL ENERGY STORAGE IN AQUIFERS  

E-Print Network [OSTI]

Mathematical Modeling of Thermal Energy Storage in Aquifers.of Aquifer Thermal Energy Storage Workshop, Lawrencewithin the Seasonal Thermal Energy Storage program managed

Tsang, C.F.

2013-01-01T23:59:59.000Z

63

SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS-MATHEMATICAL MODELING STUDIES IN 1979  

E-Print Network [OSTI]

of Aquifer Thermal Energy Storage." Lawrence Berkeleythe Auburn University Thermal Energy Storage Experiment."LBL~l0208 SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS~

Tsang, Chin Fu

2013-01-01T23:59:59.000Z

64

THEORETICAL STUDIES IN LONG-TERM THERMAL ENERGY STORAGE IN AQUIFERS  

E-Print Network [OSTI]

Mathematical Modeling of Thermal Energy Storage in Aquifers.of Aquifer Thermal Energy Storage Workshop, Lawrencethe Seasonal Thermal Energy Storage program managed by

Tsang, C.F.

2013-01-01T23:59:59.000Z

65

Optimal Deployment of Thermal Energy Storage under Diverse Economic and Climate Conditions  

E-Print Network [OSTI]

2012. [8] Dincer I. On thermal energy storage systems andin research on cold thermal energy storage, InternationalLF. Overview of thermal energy storage (TES) potential

DeForest, Nicolas

2014-01-01T23:59:59.000Z

66

SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS-MATHEMATICAL MODELING STUDIES IN 1979  

E-Print Network [OSTI]

Aspects of Aquifer Thermal Energy Storage." Lawrencethe Auburn University Thermal Energy Storage Experiment."LBL~l0208 SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS~

Tsang, Chin Fu

2013-01-01T23:59:59.000Z

67

Modeling of Thermal Storage Systems in MILP Distributed Energy Resource Models  

E-Print Network [OSTI]

potential materials for thermal energy storage in buildingcogeneration coupled with thermal energy storage," AppliedN. Fumo, "Benefits of thermal energy storage option combined

Steen, David

2014-01-01T23:59:59.000Z

68

THEORETICAL STUDIES IN LONG-TERM THERMAL ENERGY STORAGE IN AQUIFERS  

E-Print Network [OSTI]

Mathematical Modeling of Thermal Energy Storage in Aquifers.Proceedings of Aquifer Thermal Energy Storage Workshop,within the Seasonal Thermal Energy Storage program managed

Tsang, C.F.

2013-01-01T23:59:59.000Z

69

Gas storage carbon with enhanced thermal conductivity  

DOE Patents [OSTI]

A carbon fiber carbon matrix hybrid adsorbent monolith with enhanced thermal conductivity for storing and releasing gas through adsorption and desorption is disclosed. The heat of adsorption of the gas species being adsorbed is sufficiently large to cause hybrid monolith heating during adsorption and hybrid monolith cooling during desorption which significantly reduces the storage capacity of the hybrid monolith, or efficiency and economics of a gas separation process. The extent of this phenomenon depends, to a large extent, on the thermal conductivity of the adsorbent hybrid monolith. This invention is a hybrid version of a carbon fiber monolith, which offers significant enhancements to thermal conductivity and potential for improved gas separation and storage systems.

Burchell, Timothy D. (Oak Ridge, TN); Rogers, Michael Ray (Knoxville, TN); Judkins, Roddie R. (Knoxville, TN)

2000-01-01T23:59:59.000Z

70

Project Profile: Novel Thermal Energy Storage Systems for Concentratin...  

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

Solar Power Project Profile: Novel Thermal Energy Storage Systems for Concentrating Solar Power University of Connecticut logo The University of Connecticut, under the Thermal...

71

Rehabilitating A Thermal Storage System Through Commissioning  

E-Print Network [OSTI]

supplementary chiller (50 tons) was needed due to an under- sized storage tank and an under-sized chller. In 1995, the authors were asked to investigate the problems and provide possible solutions. The thermal storage system was subsequently rehabilitated... draws water from the bottom of the tank and sends the return water to the top of the tank. Valve V4 isolates the chiller from the building and the tank. In the charging mode (Figure 2b), valves V3 and V4 are open while valve V1 is 06 wcad closed...

Liu, M.; Veteto, B.; Claridge, D. E.

1998-01-01T23:59:59.000Z

72

Investigations in cool thermal storage: storage process optimization and glycol sensible storage enhancement  

E-Print Network [OSTI]

device in order to meet the utility's mandate. The first part of this study looks at the effects of adding propylene glycol to a static-water ice thermal storage tank, in the pursuit of increasing storage capacity. The effects of glycol addition...

Abraham, Michaela Marie

1993-01-01T23:59:59.000Z

73

STATE OF CALIFORNIA THERMAL ENERGY STORAGE (TES) SYSTEM ACCEPTANCE  

E-Print Network [OSTI]

STATE OF CALIFORNIA THERMAL ENERGY STORAGE (TES) SYSTEM ACCEPTANCE CEC-MECH-15A (Revised 07/10) CALIFORNIA ENERGY COMMISSION CERTIFICATE OF ACCEPTANCE MECH-15A NA7.5.14 Thermal Energy Storage (TES) System THERMAL ENERGY STORAGE (TES) SYSTEM ACCEPTANCE CEC-MECH-15A (Revised 07/10) CALIFORNIA ENERGY COMMISSION

74

Advanced Thermal Energy Storage: Novel Tuning of Critical Fluctuations for Advanced Thermal Energy Storage  

SciTech Connect (OSTI)

HEATS Project: NAVITASMAX is developing a novel thermal energy storage solution. This innovative technology is based on simple and complex supercritical fluids— substances where distinct liquid and gas phases do not exist, and tuning the properties of these fluid systems to increase their ability to store more heat. In solar thermal storage systems, heat can be stored in NAVITASMAX’s system during the day and released at night—when the sun is not shining—to drive a turbine and produce electricity. In nuclear storage systems, heat can be stored in NAVITASMAX’s system at night and released to produce electricity during daytime peak-demand hours.

None

2011-12-01T23:59:59.000Z

75

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

76

Metal Hydride Thermal Storage: Reversible Metal Hydride Thermal Storage for High-Temperature Power Generation Systems  

SciTech Connect (OSTI)

HEATS Project: PNNL is developing a thermal energy storage system based on a Reversible Metal Hydride Thermochemical (RMHT) system, which uses metal hydride as a heat storage material. Heat storage materials are critical to the energy storage process. In solar thermal storage systems, heat can be stored in these materials during the day and released at night—when the sun is not out—to drive a turbine and produce electricity. In nuclear storage systems, heat can be stored in these materials at night and released to produce electricity during daytime peak-demand hours. PNNL’s metal hydride material can reversibly store heat as hydrogen cycles in and out of the material. In a RHMT system, metal hydrides remain stable in high temperatures (600- 800°C). A high-temperature tank in PNNL’s storage system releases heat as hydrogen is absorbed, and a low-temperature tank stores the heat until it is needed. The low-cost material and simplicity of PNNL’s thermal energy storage system is expected to keep costs down. The system has the potential to significantly increase energy density.

None

2011-12-05T23:59:59.000Z

77

Aquifer thermal energy storage. International symposium: Proceedings  

SciTech Connect (OSTI)

Aquifers have been used to store large quantities of thermal energy to supply process cooling, space cooling, space heating, and ventilation air preheating, and can be used with or without heat pumps. Aquifers are used as energy sinks and sources when supply and demand for energy do not coincide. Aquifer thermal energy storage may be used on a short-term or long-term basis; as the sole source of energy or as a partial storage; at a temperature useful for direct application or needing upgrade. The sources of energy used for aquifer storage are ambient air, usually cold winter air; waste or by-product energy; and renewable energy such as solar. The present technical, financial and environmental status of ATES is promising. Numerous projects are operating and under development in several countries. These projects are listed and results from Canada and elsewhere are used to illustrate the present status of ATES. Technical obstacles have been addressed and have largely been overcome. Cold storage in aquifers can be seen as a standard design option in the near future as it presently is in some countries. The cost-effectiveness of aquifer thermal energy storage is based on the capital cost avoidance of conventional chilling equipment and energy savings. ATES is one of many developments in energy efficient building technology and its success depends on relating it to important building market and environmental trends. This paper attempts to provide guidance for the future implementation of ATES. Individual projects have been processed separately for entry onto the Department of Energy databases.

NONE

1995-05-01T23:59:59.000Z

78

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

The Legalization of Ground Water Storage," Water Resourcesprocedure to above ground storage of heat in huge insulatedthis project is heat storage in ground-water regions storage

Authors, Various

2011-01-01T23:59:59.000Z

79

Thermal performance of the Brookhaven natural thermal storage house  

SciTech Connect (OSTI)

In the Brookhaven natural thermal storage house, an energy-efficient envelope, passive solar collectors, and a variety of energy conservation methods are incorporated. The thermal characteristics of the house during the tested heating season are evaluated. Temperature distributions at different zones are displayed, and the effects of extending heating supply ducts only to the main floor and heating return ducts only from the second floor are discussed. The thermal retrievals from the structure and the passive collectors are assessed, and the total conservation and passive solar contributions are outlined. Several correlation factors relating these thermal behaviors are introduced, and their diurnal variations are displayed. Finally, the annual energy requirements, and the average load factors are analyzed and discussed.

Ghaffari, H.T.; Jones, R.F.

1981-01-01T23:59:59.000Z

80

Chilled Water Thermal Storage System and Demand Response at the University of California at Merced  

E-Print Network [OSTI]

Chilled Water Thermal Storage System and Demand Response atChilled Water Thermal Storage System and Demand Response atgallon chilled water storage system is charged daily during

Granderson, Jessica

2010-01-01T23:59:59.000Z

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

SEASONAL THERMAL ENERGY STORAGE IN AQUIFERS-MATHEMATICAL MODELING STUDIES IN 1979  

E-Print Network [OSTI]

of Aquifer Thermal Energy Storage." Lawrence BerkeleyP, Andersen, "'rhermal Energy Storage in a Confined Aquifer~University Thermal Energy Storage Experiment." Lawrence

Tsang, Chin Fu

2013-01-01T23:59:59.000Z

82

Sandia National Laboratories: solar thermal storage  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbineredox-activeNational Solar Thermal Testthermal storage Sandia

83

Thermal Characterization of Graphitic Carbon Foams for Use in Thermal Storage Applications.  

E-Print Network [OSTI]

?? Highly conductive graphitic foams are currently being studied for use as thermal conductivity enhancers (TCEs) in thermal energy storage (TES) systems. TES systems store… (more)

Drummond, Kevin P.

2012-01-01T23:59:59.000Z

84

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

85

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

E-Print Network [OSTI]

STORAGE FOR CONCENTRATING SOLAR POWER PLANTS,” Eurosun 2010,COST REDUCTION STUDY FOR SOLAR THERMAL POWER PLANTS, Ottawa,heat transfer in solar thermal power plants utilizing phase

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

86

Computational Study on Thermal Properties of HVAC System with Building Structure Thermal Storage  

E-Print Network [OSTI]

Building structure thermal storage (BSTS) HVAC systems can store heat during nighttime thermal storage operation (nighttime operation hours) by using off-peak electricity and release it in the daytime air-conditioning operation (daytime operation...

Sato, Y.; Sagara, N.; Ryu, Y.; Maehara, K.; Nagai, T.

2007-01-01T23:59:59.000Z

87

An Evaluation of Thermal Storage at Two Industrial Plants  

E-Print Network [OSTI]

Thermal storage offers substantial energy cost savings potential in situations with favorable electrical rates and significant cooling demand. Full storage is usually restricted to facilities occupied only part of the day, but two industrial plants...

Brown, M. L.; Gurta, M. E.

88

Boosting CSP Production with Thermal Energy Storage  

SciTech Connect (OSTI)

Combining concentrating solar power (CSP) with thermal energy storage shows promise for increasing grid flexibility by providing firm system capacity with a high ramp rate and acceptable part-load operation. When backed by energy storage capability, CSP can supplement photovoltaics by adding generation from solar resources during periods of low solar insolation. The falling cost of solar photovoltaic (PV) - generated electricity has led to a rapid increase in the deployment of PV and projections that PV could play a significant role in the future U.S. electric sector. The solar resource itself is virtually unlimited; however, the actual contribution of PV electricity is limited by several factors related to the current grid. The first is the limited coincidence between the solar resource and normal electricity demand patterns. The second is the limited flexibility of conventional generators to accommodate this highly variable generation resource. At high penetration of solar generation, increased grid flexibility will be needed to fully utilize the variable and uncertain output from PV generation and to shift energy production to periods of high demand or reduced solar output. Energy storage is one way to increase grid flexibility, and many storage options are available or under development. In this article, however, we consider a technology already beginning to be used at scale - thermal energy storage (TES) deployed with concentrating solar power (CSP). PV and CSP are both deployable in areas of high direct normal irradiance such as the U.S. Southwest. The role of these two technologies is dependent on their costs and relative value, including how their value to the grid changes as a function of what percentage of total generation they contribute to the grid, and how they may actually work together to increase overall usefulness of the solar resource. Both PV and CSP use solar energy to generate electricity. A key difference is the ability of CSP to utilize high-efficiency TES, which turns CSP into a partially dispatchable resource. The addition of TES produces additional value by shifting the delivery of solar energy to periods of peak demand, providing firm capacity and ancillary services, and reducing integration challenges. Given the dispatchability of CSP enabled by TES, it is possible that PV and CSP are at least partially complementary. The dispatchability of CSP with TES can enable higher overall penetration of the grid by solar energy by providing solar-generated electricity during periods of cloudy weather or at night, when PV-generated power is unavailable. Such systems also have the potential to improve grid flexibility, thereby enabling greater penetration of PV energy (and other variable generation sources such as wind) than if PV were deployed without CSP.

Denholm, P.; Mehos, M.

2012-06-01T23:59:59.000Z

89

Thermal Storage Applications for Commercial/Industrial Facilities  

E-Print Network [OSTI]

THERMAL STORAGE APPLICATIONS FOR COMMERCIAL/INDUSTRIAL FACILITIES Roger 1. Knipp, PE. Dallas Power & Light Company Dallas, Texas ABSTRACT Texas Utilities Electric Company has been actively encouraging installations of thermal storage... since 1981. Financial incentives and advantageous rates can make thermal storage an attractive cooling concept in Texas Utilities Electric Company service area. Currently, 14 million square feet of commercial building space in Dallas is either...

Knipp, R. L.

90

Carbon Foam Infused with Pentaglycerine for Thermal Energy Storage Applications.  

E-Print Network [OSTI]

??A thermal energy storage device that uses pentaglycerine as a phase change material was developed. This solid-state phase change material was embedded in a carbon… (more)

Johnson, Douglas James

2011-01-01T23:59:59.000Z

91

Performance investigation of various cold thermal energy storages.  

E-Print Network [OSTI]

??This study deals with solidification and melting of some typical encapsulated ice thermal energy storage geometries. Using ANSYS GAMBIT and FLUENT 6.0 software, HTF fluid… (more)

MacPhee, David

2008-01-01T23:59:59.000Z

92

Thermal Storage Materials Laboratory (Fact Sheet), NREL (National...  

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

heat transfer fluids or thermal energy storage media in concentrating solar power (CSP) plants. Research objectives include the discovery and evaluation of candidate fluids...

93

Project Profile: Novel Thermal Storage Technologies for Concentrating...  

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

feasibility of using phase change materials (PCM) at elevated temperatures and to acquire engineering results that will lead to the demonstration of large-scale thermal storage...

94

Thermal Storage and Advanced Heat Transfer Fluids (Fact Sheet)  

SciTech Connect (OSTI)

Fact sheet describing NREL CSP Program capabilities in the area of thermal storage and advanced heat transfer fluids: measuring thermophysical properties, measuring fluid flow and heat transfer, and simulating flow of thermal energy and fluid.

Not Available

2010-08-01T23:59:59.000Z

95

Composite materials for thermal energy storage  

DOE Patents [OSTI]

A composite material for thermal energy storage based upon polyhydric alcohols, such as pentaerythritol, trimethylol ethane (also known as pentaglycerine), neopentyl glycol and related compounds including trimethylol propane, monoaminopentaerythritol, diamino-pentaerythritol and tris(hydroxymethyl)acetic acid, separately or in combinations, which provide reversible heat storage through crystalline phase transformations. These PCM's do not become liquid during use and are in contact with at least one material selected from the group consisting of metals, carbon, siliceous, plastic, cellulosic, natural fiber, artificial fiber, concrete, gypsum, porous rock, and mixtures thereof. Particulate additions such as aluminum or graphite powders, as well as metal and carbon fibers can also be incorporated therein. Particulate and/or fibrous additions can be introduced into molten phase change materials which can then be cast into various shapes. After the phase change materials have solidified, the additions will remain dispersed throughout the matrix of the cast solid. The polyol is in contact with at least one material selected from the group consisting of metals, carbon, siliceous, plastic, cellulosic, natural fiber, artificial fiber, concrete, gypsum, and mixtures thereof.

Benson, D.K.; Burrows, R.W.; Shinton, Y.D.

1985-01-04T23:59:59.000Z

96

Composite materials for thermal energy storage  

DOE Patents [OSTI]

The present invention discloses composite material for thermal energy storage based upon polyhydric alcohols, such as pentaerythritol, trimethylol ethane (also known as pentaglycerine), neopentyl glycol and related compounds including trimethylol propane, monoaminopentaerythritol, diamino-pentaerythritol and tris(hydroxymethyl)acetic acid, separately or in combinations, which provide reversible heat storage through crystalline phase transformations. These phase change materials do not become liquid during use and are in contact with at least one material selected from the group consisting of metals, carbon siliceous, plastic, cellulosic, natural fiber, artificial fiber, concrete, gypsum, porous rock, and mixtures thereof. Particulate additions, such as aluminum or graphite powders, as well as metal and carbon fibers can also be incorporated therein. Particulate and/or fibrous additions can be introduced into molten phase change materials which can then be cast into various shapes. After the phase change materials have solidified, the additions will remain dispersed throughout the matrix of the cast solid. The polyol is in contact with at least one material selected from the group consisting of metals, carbon siliceous, plastic, cellulosic, natural fiber, artificial fiber, concrete, gypsum, and mixtures thereof.

Benson, David K. (Golden, CO); Burrows, Richard W. (Conifer, CO); Shinton, Yvonne D. (Northglenn, CO)

1986-01-01T23:59:59.000Z

97

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

98

Eurotherm Seminar #99 Advances in Thermal Energy Storage  

E-Print Network [OSTI]

Eurotherm Seminar #99 Advances in Thermal Energy Storage 1 EUROTHERM99-01-103 Convection Energy Storage 2 Nussel number. This study shows that an increase in the convection coefficient leads in this paper consists in horizontal PCM plates separated by an air flow. This is a storage system dedicated

Boyer, Edmond

99

EXERGETIC ANALYSIS OF A STEAM-FLASHING THERMAL STORAGE SYSTEM  

E-Print Network [OSTI]

cost benefits are still evident. Currently, there are many solar power plants that have been announced Abstract Thermal energy storage is attractive in the design of concentrator solar thermal systems because, power output from a solar field. At the right cost, a storage system can improve overall economics

100

Optimization of Ice Thermal Storage Systems Design for HVAC Systems  

E-Print Network [OSTI]

Ice thermal storage is promising technology to reduce energy costs by shifting the cooling cost from on-peak to off-peak periods. The paper discusses the optimal design of ice thermal storage and its impact on energy consumption, demand, and total...

Nassif, N.; Hall, C.; Freelnad, D.

2013-01-01T23:59:59.000Z

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

Continuous Commissioning(SM) of a Thermal Storage System  

E-Print Network [OSTI]

shows that commissioning of the thermal storage system is not limited to the storage tank itself, but is closely related to successful commissioning of building air handling units (AHUs) and chilled water loops. The full benefit of a thermal storage... than a dozen major buildings. The storage system was installed after a campus-wide energy efficiency retrofit. It is designed to store 42?F chilled water with a return water temperature of 56?F. Total storage capacity is 7000 ton-hours. The tank...

Turner, W. D.; Liu, M.

2001-01-01T23:59:59.000Z

102

Verification survey report of the south waste tank farm training/test tower and hazardous waste storage lockers at the West Valley demonstration project, West Valley, New York  

SciTech Connect (OSTI)

A team from ORAU's Independent Environmental Assessment and Verification Program performed verification survey activities on the South Test Tower and four Hazardous Waste Storage Lockers. Scan data collected by ORAU determined that both the alpha and alpha-plus-beta activity was representative of radiological background conditions. The count rate distribution showed no outliers that would be indicative of alpha or alpha-plus-beta count rates in excess of background. It is the opinion of ORAU that independent verification data collected support the site?s conclusions that the South Tower and Lockers sufficiently meet the site criteria for release to recycle and reuse.

Weaver, Phyllis C.

2012-08-29T23:59:59.000Z

103

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

104

Thermal Energy Storage for Electricity Peak-demand Mitigation: A Solution in Developing and Developed World Alike  

E-Print Network [OSTI]

N ATIONAL L ABORATORY Thermal Energy Storage for Electricity20, 2012. I. Dincer, On thermal energy storage systems andin research on cold thermal energy storage, International

DeForest, Nicholas

2014-01-01T23:59:59.000Z

105

MULTIPLE WELL VARIABLE RATE WELL TEST ANALYSIS OF DATA FROM THE AUBURN UNIVERSITY THERMAL ENERGY STORAGE PROGRAM  

E-Print Network [OSTI]

experimental Thermal energy storage in confined aquifers. ©lAUBURN UNIVERSITY THERMAL ENERGY STORAGE PROGRM1 Christineseries of aquifer thermal energy storage field experiments.

Doughty, Christine

2012-01-01T23:59:59.000Z

106

Thermal Energy Storage for Electricity Peak-demand Mitigation: A Solution in Developing and Developed World Alike  

E-Print Network [OSTI]

20, 2012. I. Dincer, On thermal energy storage systems andin research on cold thermal energy storage, Internationalpp177–189, 2002. [PG&E] Thermal Energy Storage Strategies

DeForest, Nicholas

2014-01-01T23:59:59.000Z

107

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

FUTURE CONSIDERATIONS FOR CAVERN STORAGE Some of the topicsgravel or sand into the cavern in order to reduce the volumeAbove ground equipment for cavern storage opera- tions.

Authors, Various

2011-01-01T23:59:59.000Z

108

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

HAUSZ, W. , 1977. "Seasonal Storage in District Heating,"District Heating, July-August-September, 1977, pp. 5-11.aquifer storage for district heating and cooling. C. W.

Authors, Various

2011-01-01T23:59:59.000Z

109

Ice Thermal Storage Systems for LWR Supplemental Cooling and Peak Power Shifting  

SciTech Connect (OSTI)

Availability of enough cooling water has been one of the major issues for the nuclear power plant site selection. Cooling water issues have frequently disrupted the normal operation at some nuclear power plants during heat waves and long draught. The issues become more severe due to the new round of nuclear power expansion and global warming. During hot summer days, cooling water leaving a power plant may become too hot to threaten aquatic life so that environmental regulations may force the plant to reduce power output or even temporarily to be shutdown. For new nuclear power plants to be built at areas without enough cooling water, dry cooling can be used to remove waste heat directly into the atmosphere. However, dry cooling will result in much lower thermal efficiency when the weather is hot. One potential solution for the above mentioned issues is to use ice thermal storage systems (ITS) that reduce cooling water requirements and boost the plant’s thermal efficiency in hot hours. ITS uses cheap off-peak electricity to make ice and uses those ice for supplemental cooling during peak demand time. ITS is suitable for supplemental cooling storage due to its very high energy storage density. ITS also provides a way to shift large amount of electricity from off peak time to peak time. Some gas turbine plants already use ITS to increase thermal efficiency during peak hours in summer. ITSs have also been widely used for building cooling to save energy cost. Among three cooling methods for LWR applications: once-through, wet cooling tower, and dry cooling tower, once-through cooling plants near a large water body like an ocean or a large lake and wet cooling plants can maintain the designed turbine backpressure (or condensation temperature) during 99% of the time; therefore, adding ITS to those plants will not generate large benefits. For once-through cooling plants near a limited water body like a river or a small lake, adding ITS can bring significant economic benefits and avoid forced derating and shutdown during extremely hot weather. For the new plants using dry cooling towers, adding the ice thermal storage systems can effectively reduce the efficiency loss and water consumption during hot weather so that new LWRs could be considered in regions without enough cooling water. \\ This paper presents the feasibility study of using ice thermal storage systems for LWR supplemental cooling and peak power shifting. LWR cooling issues and ITS application status will be reviewed. Two ITS application case studies will be presented and compared with alternative options: one for once-through cooling without enough cooling for short time, and the other with dry cooling. Because capital cost, especially the ice storage structure/building cost, is the major cost for ITS, two different cost estimation models are developed: one based on scaling method, and the other based on a preliminary design using Building Information Modeling (BIM), an emerging technology in Architecture/Engineering/Construction, which enables design options, performance analysis and cost estimating in the early design stage.

Haihua Zhao; Hongbin Zhang; Phil Sharpe; Blaise Hamanaka; Wei Yan; WoonSeong Jeong

2010-06-01T23:59:59.000Z

110

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

111

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

112

Designing a Thermal Energy Storage Program for Electric Utilities  

E-Print Network [OSTI]

Electric utilities are looking at thermal energy storage technology as a viable demand side management (DSM) option. In order for this DSM measure to be effective, it must be incorporated into a workable, well-structured utility program. This paper...

Niehus, T. L.

1994-01-01T23:59:59.000Z

113

The Strong Case for Thermal Energy Storage and Utility Incentives  

E-Print Network [OSTI]

construction costs, more stringent regulations, and increasing environmental constraints regarding development of new generating facilities. As the thermal cooling storage technology has matured, more and more utilities are recognizing that widespread use...

McCannon, L. W.

114

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

F. J. Molz. Subsurface Waste Heat Storage, Experimentalfor land disposal of waste heat and waste water. Inst. forfor land disposal of waste heat and waste water. Inst. for

Authors, Various

2011-01-01T23:59:59.000Z

115

AQUIFER THERMAL ENERGY STORAGE-A SURVEY  

E-Print Network [OSTI]

energy storage for cogeneration and solar systems, inTwin City district cogeneration system, in Proceedings,proposed system, based on cogeneration of power and heat by

Tsang, Chin Fu

2012-01-01T23:59:59.000Z

116

Modeling of thermal energy storage in groundwater aquifers  

E-Print Network [OSTI]

MODELING OF THERMAL ENERGY STORAGE IN GROUNDWATER AQUIFERS A Thesis by DAVID BRYAN REED Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1979... ABSTRACT Modeling of Thermal Energy Storage in Groundwater Aquifers. (December 1979) David Bryan Reed, B. S. , Texas A&M University Chairman of Advisory Committee: Dr. Donald L. Reddell Solar energy is a promising alternate energy source for space heat...

Reed, David Bryan

2012-06-07T23:59:59.000Z

117

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

118

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

III, "Man-made Geothermal Energy," presented at MiamiA.C.Meyers III; "Manmade Geothermal Energy", Proc. of Miamiin soils extraction of geothermal energy heat storage in the

Authors, Various

2011-01-01T23:59:59.000Z

119

Aquifer thermal energy storage reference manual: seasonal thermal energy storage program  

SciTech Connect (OSTI)

This is the reference manual of the Seasonal Thermal Energy Storage (STES) Program, and is the primary document for the transfer of technical information of the STES Program. It has been issued in preliminary form and will be updated periodically to include more technical data and results of research. As the program progresses and new technical data become available, sections of the manual will be revised to incorporate these data. This primary document contains summaries of: the TRW, incorporated demonstration project at Behtel, Alaska, Dames and Moore demonstration project at Stony Brook, New York, and the University of Minnesota demonstration project at Minneapolis-St. Paul, Minnesota; the technical support programs including legal/institutional assessment; economic assessment; environmental assessment; field test facilities; a compendia of existing information; numerical simulation; and non-aquifer STES concepts. (LCL)

Prater, L.S.

1980-01-01T23:59:59.000Z

120

Dish Stirling High Performance Thermal Storage  

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

metrology for development and production Glint and glare Design tools National Solar Thermal Test Facility: Rich Dish Stirling Tradition Involvement with most Dish...

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

Thermal Energy Storage in Adsorbent Beds .  

E-Print Network [OSTI]

??Total produced energy in the world is mostly consumed as thermal energy which is used for space or water heating. Currently, more than 85% of… (more)

Ugur, Burcu

2013-01-01T23:59:59.000Z

122

Performance evaluation of thermal energy storage systems;.  

E-Print Network [OSTI]

??Solar thermal technologies are promising, given the fact that solar newlineenergy is the cheapest and most widely available of all renewable energy newlinetechnologies. The recent… (more)

Ramana A S

2014-01-01T23:59:59.000Z

123

Preliminary survey and evaluation of nonaquifer thermal energy storage concepts for seasonal storage  

SciTech Connect (OSTI)

Thermal energy storage enables the capture and retention of heat energy (or cold) during one time period for use during another. Seasonal thermal energy storage (STES) involves a period of months between the input and recovery of energy. The purpose of this study was to make a preliminary investigation and evaluation of potential nonaquifer STES systems. Current literature was surveyed to determine the state of the art of thermal energy storage (TES) systems such as hot water pond storage, hot rock storage, cool ice storage, and other more sophisticated concepts which might have potential for future STES programs. The main energy sources for TES principally waste heat, and the main uses of the stored thermal energy, i.e., heating, cooling, and steam generation are described. This report reviews the development of sensible, latent, and thermochemical TES technologies, presents a preliminary evaluation of the TES methods most applicable to seasonal storage uses, outlines preliminary conclusions drawn from the review of current TES literature, and recommends further research based on these conclusions. A bibliography of the nonaquifer STES literature review, and examples of 53 different TES concepts drawn from the literature are provided. (LCL)

Blahnik, D.E.

1980-11-01T23:59:59.000Z

124

Thermal Storage with Conventional Cooling Systems  

E-Print Network [OSTI]

demand which results in lower electrical costs. The effectiveness of this 'Thermal Retention System" is determined by its design characteristics, its operational efficiency and comparative system analysis. Today's computer technology has provided...

McGee, E. E.

1990-01-01T23:59:59.000Z

125

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

of Thermal Energy Energy Sources o Solar Heat o Winter Coldusual Solar Energy System which uses only a heat source andsources and heat sinks not found anywhere else. Furthermore even where Solar energy

Authors, Various

2011-01-01T23:59:59.000Z

126

Legal and regulatory issues affecting aquifer thermal energy storage  

SciTech Connect (OSTI)

This document updates and expands the report with a similar title issued in October 1980. This document examines a number of legal and regulatory issues that potentially can affect implementation of the aquifer thermal energy storage (ATES) concept. This concept involves the storage of thermal energy in an underground aquifer until a later date when it can be effectively utilized. Either heat energy or chill can be stored. Potential end uses of the energy include district space heating and cooling, industrial process applications, and use in agriculture or aquaculture. Issues are examined in four categories: regulatory requirements, property rights, potential liability, and issues related to heat or chill delivery.

Hendrickson, P.L.

1981-10-01T23:59:59.000Z

127

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

128

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

129

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

130

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

131

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

132

Phase change thermal energy storage material  

DOE Patents [OSTI]

A thermal energy storge composition is disclosed. The composition comprises a non-chloride hydrate having a phase change transition temperature in the range of 70.degree.-95.degree. F. and a latent heat of transformation of at least about 35 calories/gram.

Benson, David K. (Golden, CO); Burrows, Richard W. (Conifer, CO)

1987-01-01T23:59:59.000Z

133

Pulse thermal energy transport/storage system  

DOE Patents [OSTI]

A pulse-thermal pump having a novel fluid flow wherein heat admitted to a closed system raises the pressure in a closed evaporator chamber while another interconnected evaporator chamber remains open. This creates a large pressure differential, and at a predetermined pressure the closed evaporator is opened and the opened evaporator is closed. This difference in pressure initiates fluid flow in the system.

Weislogel, Mark M. (23133 Switzer Rd., Brookpark, OH 44142)

1992-07-07T23:59:59.000Z

134

Power Tower Technology Roadmap and cost reduction plan.  

SciTech Connect (OSTI)

Concentrating solar power (CSP) technologies continue to mature and are being deployed worldwide. Power towers will likely play an essential role in the future development of CSP due to their potential to provide dispatchable solar electricity at a low cost. This Power Tower Technology Roadmap has been developed by the U.S. Department of Energy (DOE) to describe the current technology, the improvement opportunities that exist for the technology, and the specific activities needed to reach the DOE programmatic target of providing competitively-priced electricity in the intermediate and baseload power markets by 2020. As a first step in developing this roadmap, a Power Tower Roadmap Workshop that included the tower industry, national laboratories, and DOE was held in March 2010. A number of technology improvement opportunities (TIOs) were identified at this workshop and separated into four categories associated with power tower subsystems: solar collector field, solar receiver, thermal energy storage, and power block/balance of plant. In this roadmap, the TIOs associated with power tower technologies are identified along with their respective impacts on the cost of delivered electricity. In addition, development timelines and estimated budgets to achieve cost reduction goals are presented. The roadmap does not present a single path for achieving these goals, but rather provides a process for evaluating a set of options from which DOE and industry can select to accelerate power tower R&D, cost reductions, and commercial deployment.

Mancini, Thomas R.; Gary, Jesse A. (U.S. Department of Energy); Kolb, Gregory J.; Ho, Clifford Kuofei

2011-04-01T23:59:59.000Z

135

Thermal energy storage for cooling of commercial buildings  

SciTech Connect (OSTI)

The storage of coolness'' has been in use in limited applications for more than a half century. Recently, because of high electricity costs during utilities' peak power periods, thermal storage for cooling has become a prime target for load management strategies. Systems with cool storage shift all or part of the electricity requirement from peak to off-peak hours to take advantage of reduced demand charges and/or off-peak rates. Thermal storage technology applies equally to industrial, commercial, and residential sectors. In the industrial sector, because of the lack of economic incentives and the custom design required for each application, the penetration of this technology has been limited to a few industries. The penetration rate in the residential sector has been also very limited due to the absence of economic incentives, sizing problems, and the lack of compact packaged systems. To date, the most promising applications of these systems, therefore, appear to be for commercial cooling. In this report, the current and potential use of thermal energy storage systems for cooling commercial buildings is investigated. In addition, a general overview of the technology is presented and the applicability and cost-effectiveness of this technology for developed and developing countries are discussed. 28 refs., 12 figs., 1 tab.

Akbari, H. (Lawrence Berkeley Lab., CA (USA)); Mertol, A. (Science Applications International Corp., Los Altos, CA (USA))

1988-07-01T23:59:59.000Z

136

Sandia National Laboratories: solar thermal energy storage  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbineredox-activeNational Solar Thermal Test Facilitysolarsolarenergy

137

Thermal energy storage technical progress report, April 1992--March 1993  

SciTech Connect (OSTI)

The Department of Energy (DOE) is supporting development of thermal energy storage (TES) as a means of efficiently coupling energy supplies to variable heating or cooling demands. Uses of TES include electrical demand-side management in buildings and industry, extending the utilization of renewable energy resources such as solar, and recovery of waste heat from periodic industrial processes. Technical progress to develop TES for specific diurnal and industrial applications under the Oak Ridge National Laboratory`s TES program from April 1992 to March 1993 is reported and covers research in the areas of low temperature sorption, thermal energy storage water heater, latent heat storage wallboard and latent/sensible heat regenerator technology development.

Olszewski, M.

1993-05-01T23:59:59.000Z

138

Wind turbine tower for storing hydrogen and energy  

DOE Patents [OSTI]

A wind turbine tower assembly for storing compressed gas such as hydrogen. The tower assembly includes a wind turbine having a rotor, a generator driven by the rotor, and a nacelle housing the generator. The tower assembly includes a foundation and a tubular tower with one end mounted to the foundation and another end attached to the nacelle. The tower includes an in-tower storage configured for storing a pressurized gas and defined at least in part by inner surfaces of the tower wall. In one embodiment, the tower wall is steel and has a circular cross section. The in-tower storage may be defined by first and second end caps welded to the inner surface of the tower wall or by an end cap near the top of the tower and by a sealing element attached to the tower wall adjacent the foundation, with the sealing element abutting the foundation.

Fingersh, Lee Jay (Westminster, CO)

2008-12-30T23:59:59.000Z

139

Design and installation manual for thermal energy storage  

SciTech Connect (OSTI)

The purpose of this manual is to provide information on the design and installation of thermal energy storage in active solar systems. It is intended for contractors, installers, solar system designers, engineers, architects, and manufacturers who intend to enter the solar energy business. The reader should have general knowledge of how solar heating and cooling systems operate and knowledge of construction methods and building codes. Knowledge of solar analysis methods such as f-Chart, SOLCOST, DOE-1, or TRNSYS would be helpful. The information contained in the manual includes sizing storage, choosing a location for the storage device, and insulation requirements. Both air-based and liquid-based systems are covered with topics on designing rock beds, tank types, pump and fan selection, installation, costs, and operation and maintenance. Topics relevant to latent heat storage include properties of phase-change materials, sizing the storage unit, insulating the storage unit, available systems, and cost. Topics relevant to heating domestic water include safety, single- and dual-tank systems, domestic water heating with air- and liquid-based space heating systems, and stand alone domestics hot water systems. Several appendices present common problems with storage systems and their solutions, heat transfer fluid properties, economic insulation thickness, heat exchanger sizing, and sample specifications for heat exchangers, wooden rock bins, steel tanks, concrete tanks, and fiberglass-reinforced plastic tanks.

Cole, R L; Nield, K J; Rohde, R R; Wolosewicz, R M

1980-01-01T23:59:59.000Z

140

Futurestock'2003 9 International Conference on Thermal Energy Storage, Warsaw, POLAND  

E-Print Network [OSTI]

is also needed when designing a BTES (Borehole Thermal Energy Storage) system. The ground thermal381 Futurestock'2003 9 th International Conference on Thermal Energy Storage, Warsaw, POLAND, BTES, TED-measurement ABSTRACT The thermal conductivity of the ground and thermal resistance

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

Distributed Energy Resources On-Site Optimization for Commercial Buildings with Electric and Thermal Storage Technologies  

E-Print Network [OSTI]

could be acquired, e.g. battery storage, the costs for whichlead/acid battery, and thermal storage, capabilities, withis limited by battery size - Heat storage is limited by

Stadler, Michael

2008-01-01T23:59:59.000Z

142

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

143

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

144

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

145

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

146

Ice Thermal Storage Systems for Nuclear Power Plant Supplemental Cooling and Peak Power Shifting  

SciTech Connect (OSTI)

Availability of cooling water has been one of the major issues for the nuclear power plant site selection. Cooling water issues have frequently disrupted the normal operation at some nuclear power plants during heat waves and long draught. One potential solution is to use ice thermal storage (ITS) systems that reduce cooling water requirements and boost the plant’s thermal efficiency in hot hours. ITS uses cheap off-peak electricity to make ice and uses the ice for supplemental cooling during peak demand time. ITS also provides a way to shift a large amount of electricity from off peak time to peak time. For once-through cooling plants near a limited water body, adding ITS can bring significant economic benefits and avoid forced derating and shutdown during extremely hot weather. For the new plants using dry cooling towers, adding the ITS systems can effectively reduce the efficiency loss during hot weather so that new plants could be considered in regions lack of cooling water. This paper will review light water reactor cooling issues and present the feasibility study results.

Haihua Zhao; Hongbin Zhang; Phil Sharpe; Blaise Hamanaka; Wei Yan; WoonSeong Jeong

2013-03-01T23:59:59.000Z

147

Thermal energy storage technical progress report, April 1990--March 1991  

SciTech Connect (OSTI)

The Department of Energy (DOE) is supporting development of thermal energy storage (TES) as a means of efficiently coupling energy supplies to variable heating or cooling demands. Uses of TES include electrical demand-side management in buildings and industry, extending the utilization of renewable energy resources such as solar, and recovery of waste heat from periodic industrial processes. Technical progress to develop TES for specific diurnal and industrial applications under Oak Ridge National Laboratory's TES program from April 1990 to March 1992 is reported and covers research in the areas of low temperature sorption, direct contact ice making, latent heat storage plasterboard and latent/sensible heat regenerator technology development.

Tomlinson, J.J.

1992-03-01T23:59:59.000Z

148

Thermal energy storage technical progress report, April 1990--March 1991  

SciTech Connect (OSTI)

The Department of Energy (DOE) is supporting development of thermal energy storage (TES) as a means of efficiently coupling energy supplies to variable heating or cooling demands. Uses of TES include electrical demand-side management in buildings and industry, extending the utilization of renewable energy resources such as solar, and recovery of waste heat from periodic industrial processes. Technical progress to develop TES for specific diurnal and industrial applications under Oak Ridge National Laboratory`s TES program from April 1990 to March 1992 is reported and covers research in the areas of low temperature sorption, direct contact ice making, latent heat storage plasterboard and latent/sensible heat regenerator technology development.

Tomlinson, J.J.

1992-03-01T23:59:59.000Z

149

COUPLING SUPERCRITICAL AND SUPERHEATED DIRECT STEAM GENERATION WITH THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

salt. This a distinct advantage for minimising the amount of salt required for a given amount of energy the advantages of high temperature that are achievable from high-concentration solar collectors such as solar energy storage system, having been demonstrated on both troughs (SEGS I) and towers (Solar Two) [3

150

Investigation of thermal storage and steam generator issues  

SciTech Connect (OSTI)

A review and evaluation of steam generator and thermal storage tank designs for commercial nitrate salt technology showed that the potential exists to procure both on a competitive basis from a number of qualified vendors. The report outlines the criteria for review and the results of the review, which was intended only to assess the feasibility of each design, not to make a comparison or select the best concept.

Not Available

1993-08-01T23:59:59.000Z

151

New phase-change thermal energy storage materials for buildings  

SciTech Connect (OSTI)

A new class of phase-change thermal energy storage materials is under development at SERI. These materials are unusual in two ways. They reversibly absorb large amounts of heat during a solid-state, crystal transformation more than 70/sup 0/C below their melting temperatures, and their solid-state transformation temperatures may be adjusted over a range from 7/sup 0/C to 188/sup 0/C by varying the ratios of binary mixtures of the components. Because these storage materials remain solid throughout the range of their service temperatures, unique opportunities exist for incorporating them into building materials. Composites have been made with ordinary, porous construction materials such as wood, gypsum board, and lightweight concrete as the matrix and with the solid-state phase change materials (SS PCM) filling the void space. The thermal storage capacities of such composites are thereby increased by more than 100% without changing the basic nature and workability of the matrix, construction material. Parametric analyses have been conducted to determine what combination of properties would be optimum for certain solar and energy conserving building applications including Trombe wall, direct gain, and distributed cool storage (combined with night ventilation).

Benson, D.K.; Christensen, C.B.; Burrows, R.W.

1985-10-01T23:59:59.000Z

152

Thermal Energy Storage for Cooling of Commercial Buildings  

E-Print Network [OSTI]

trates a design load profile for a partial storage system.load management / full storage / ice storage / partialfor partial storage) because part of the cooling load is

Akbari, H.

2010-01-01T23:59:59.000Z

153

AQUIFER THERMAL ENERGY STORAGE. A NUMERICAL SIMULATION OF AUBURN UNIVERSITY FIELD EXPERIMENTS  

E-Print Network [OSTI]

C.F. , 1980, "Aquifer Thermal Energy - Parameter Study" (infrom the Auburn University Thermal Energy Storage , LBL No.studies in aquifer thermal energy , Presented at the ~~~~~~~

Tsang, Chin Fu

2013-01-01T23:59:59.000Z

154

PHASE CHANGE MATERIALS IN FLOOR TILES FOR THERMAL ENERGY STORAGE  

SciTech Connect (OSTI)

Passive solar systems integrated into residential structures significantly reduce heating energy consumption. Taking advantage of latent heat storage has further increased energy savings. This is accomplished by the incorporation of phase change materials into building materials used in passive applications. Trombe walls, ceilings and floors can all be enhanced with phase change materials. Increasing the thermal storage of floor tile by the addition of encapsulated paraffin wax is the proposed topic of research. Latent heat storage of a phase change material (PCM) is obtained during a change in phase. Typical materials use the latent heat released when the material changes from a liquid to a solid. Paraffin wax and salt hydrates are examples of such materials. Other PCMs that have been recently investigated undergo a phase transition from one solid form to another. During this process they will release heat. These are known as solid-state phase change materials. All have large latent heats, which makes them ideal for passive solar applications. Easy incorporation into various building materials is must for these materials. This proposal will address the advantages and disadvantages of using these materials in floor tile. Prototype tile will be made from a mixture of quartz, binder and phase change material. The thermal and structural properties of the prototype tiles will be tested fully. It is expected that with the addition of the phase change material the structural properties will be compromised to some extent. The ratio of phase change material in the tile will have to be varied to determine the best mixture to provide significant thermal storage, while maintaining structural properties that meet the industry standards for floor tile.

Douglas C. Hittle

2002-10-01T23:59:59.000Z

155

Similarity and generalized analysis of efficiencies of thermal energy storage systems  

SciTech Connect (OSTI)

This paper examined the features of three typical thermal storage systems including: (1) direct storage of heat transfer fluid in containers, (2) storage of thermal energy in a packed bed of solid filler material, with energy being carried in/out by a flowing heat transfer fluid which directly contacts the packed bed, and (3) a system in which heat transfer fluid flows through tubes that are imbedded into a thermal storage material which may be solid, liquid, or a mixture of the two. The similarity of the three types of thermal storage systems was discussed, and generalized energy storage governing equations were introduced in both dimensional and dimensionless forms. The temperatures of the heat transfer fluid during energy charge and discharge processes and the overall energy storage efficiencies were studied through solution of the energy storage governing equations. Finally, provided in the paper are a series of generalized charts bearing curves for energy storage effectiveness against four dimensionless parameters grouped up from many of the thermal storage system properties including dimensions, fluid and thermal storage material properties, as well as the operational conditions including mass flow rate of the fluid, and the ratio of energy charge and discharge time periods. Engineers can conveniently look up the charts to design and calibrate the size of thermal storage tanks and operational conditions without doing complicated individual modeling and computations. It is expected that the charts will serve as standard tools for thermal storage system design and calibration.

Peiwen Li; Jon Van Lew; Cholik Chan; Wafaa Karaki; Jake Stephens; J. E. O'Brien

2012-03-01T23:59:59.000Z

156

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

157

Development of Thermal Analysis Capability of Dry Storage Cask for Spend Fuel Interim Storage  

SciTech Connect (OSTI)

As most of the nuclear power plants, on-site spent fuel pools (SFP) of Taiwan's plants were not originally designed with a storage capacity for all the spent fuel generated over the operating life by their reactors. For interim spent fuel storage, dry casks are one of the most reliable measures to on-site store over-filled assemblies from SFPs. The NUHOMS{sup R}-52B System consisting of a canister stored horizontally in a concrete module is selected for thermal evaluation in this paper. The performance of each cask in criticality, radioactive, material and thermal needs to be carefully addressed to ensure its enduring safety. Regarding the thermal features of dry storage casks, three different kinds of heat transfer mechanisms are involved, which include natural convection heat transfer outside and/or inside the canister, radiation heat transfer inside and outside the canister, and conduction heat transfer inside the canister. To analyze the thermal performance of dry storage casks, RELAP5-3D is adopted to calculate the natural air convection and radiation heat transfer outside the canister to the ambient environment, and ANSYS is applied to calculate the internal conduction and radiation heat transfer. During coupling iteration between codes, the heat energy across the canister wall needs to be conserved, and the inner wall temperature of the canister needs to be converged. By the coupling of RELAP5-3D and ANSYS, the temperature distribution within each fuel assembly inside canisters can be calculated and the peaking cladding temperature can be identified. (authors)

Fu-Kuang Ko; Liang, Thomas K.S.; Chung-Yu Yang [Institute of Nuclear Energy Research P.O. Box 3-3, Longtan, 32500, Taiwan (China)

2002-07-01T23:59:59.000Z

158

Developing a Cost Model and Methodology to Estimate Capital Costs for Thermal Energy Storage  

SciTech Connect (OSTI)

This report provides an update on the previous cost model for thermal energy storage (TES) systems. The update allows NREL to estimate the costs of such systems that are compatible with the higher operating temperatures associated with advanced power cycles. The goal of the Department of Energy (DOE) Solar Energy Technology Program is to develop solar technologies that can make a significant contribution to the United States domestic energy supply. The recent DOE SunShot Initiative sets a very aggressive cost goal to reach a Levelized Cost of Energy (LCOE) of 6 cents/kWh by 2020 with no incentives or credits for all solar-to-electricity technologies.1 As this goal is reached, the share of utility power generation that is provided by renewable energy sources is expected to increase dramatically. Because Concentrating Solar Power (CSP) is currently the only renewable technology that is capable of integrating cost-effective energy storage, it is positioned to play a key role in providing renewable, dispatchable power to utilities as the share of power generation from renewable sources increases. Because of this role, future CSP plants will likely have as much as 15 hours of Thermal Energy Storage (TES) included in their design and operation. As such, the cost and performance of the TES system is critical to meeting the SunShot goal for solar technologies. The cost of electricity from a CSP plant depends strongly on its overall efficiency, which is a product of two components - the collection and conversion efficiencies. The collection efficiency determines the portion of incident solar energy that is captured as high-temperature thermal energy. The conversion efficiency determines the portion of thermal energy that is converted to electricity. The operating temperature at which the overall efficiency reaches its maximum depends on many factors, including material properties of the CSP plant components. Increasing the operating temperature of the power generation system leads to higher thermal-to-electric conversion efficiency. However, in a CSP system, higher operating temperature also leads to greater thermal losses. These two effects combine to give an optimal system-level operating temperature that may be less than the upper operating temperature limit of system components. The overall efficiency may be improved by developing materials, power cycles, and system-integration strategies that enable operation at elevated temperature while limiting thermal losses. This is particularly true for the TES system and its components. Meeting the SunShot cost target will require cost and performance improvements in all systems and components within a CSP plant. Solar collector field hardware will need to decrease significantly in cost with no loss in performance and possibly with performance improvements. As higher temperatures are considered for the power block, new working fluids, heat-transfer fluids (HTFs), and storage fluids will all need to be identified to meet these new operating conditions. Figure 1 shows thermodynamic conversion efficiency as a function of temperature for the ideal Carnot cycle and 75% Carnot, which is considered to be the practical efficiency attainable by current power cycles. Current conversion efficiencies for the parabolic trough steam cycle, power tower steam cycle, parabolic dish/Stirling, Ericsson, and air-Brayton/steam Rankine combined cycles are shown at their corresponding operating temperatures. Efficiencies for supercritical steam and carbon dioxide (CO{sub 2}) are also shown for their operating temperature ranges.

Glatzmaier, G.

2011-12-01T23:59:59.000Z

159

Thermal analysis of the failed equipment storage vault system  

SciTech Connect (OSTI)

A storage facility for failed glass melters is required for radioactive operation of the Defense Waste Processing Facility (DWPF). It is currently proposed that the failed melters be stored in the Failed Equipment Storage Vaults (FESV`s) in S area. The FESV`s are underground reinforced concrete structures constructed in pairs, with adjacent vaults sharing a common wall. A failed melter is to be placed in a steel Melter Storage Box (MSB), sealed, and lowered into the vault. A concrete lid is then placed over the top of the FESV. Two melters will be placed within the FESV/MSB system, separated by the common wall. There is no forced ventilation within the vault so that the melter is passively cooled. Temperature profiles in the Failed Equipment Storage Vault Structures have been generated using the FLOW3D software to model heat conduction and convection within the FESV/MSB system. Due to complexities in modeling radiation with FLOW3D, P/THERMAL software has been used to model radiation using the conduction/convection temperature results from FLOW3D. The final conjugate model includes heat transfer by conduction, convection, and radiation to predict steady-state temperatures. Also, the FLOW3D software has been validated as required by the technical task request.

Jerrell, J.; Lee, S.Y.; Shadday, A.

1995-07-01T23:59:59.000Z

160

Assessment and Prediction of the Thermal Performance of a Centralized Latent Heat Thermal Energy Storage Utilizing Artificial Neural Network  

E-Print Network [OSTI]

A simulation tool is developed to analyze the thermal performance of a centralized latent heat thermal energy storage system (LHTES) using computational fluid dynamics (CFD). The LHTES system is integrated with a mechanical ventilation system...

El-Sawi, A.; Haghighat, F.; Akbari, H.

2013-01-01T23:59:59.000Z

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

technology offer SandTES -High Temperature Sand Thermal Energy Storage  

E-Print Network [OSTI]

technology offer SandTES - High Temperature Sand Thermal Energy Storage key words: High Temperature Energy Storage | Fluidized Bed | Sand | The invention consists of a fluidized bed with internal heat together with Dr. Eisl of ENRAG GmbH. Background Thermal energy storage (TES) systems are essential

Szmolyan, Peter

162

Short term thermal energy storage Institut fr Kernenergetik und Energiesysteme, University of Stuttgart, Stuttgart, FRG  

E-Print Network [OSTI]

477 Short term thermal energy storage A. Abhat Institut für Kernenergetik und Energiesysteme the problem of short term thermal energy storage for low temperature solar heating applications. The techniques of sensible and latent heat storage are discussed, with particular emphasis on the latter

Paris-Sud XI, Université de

163

Conceptual design and engineering studies of adiabatic compressed air energy storage (CAES) with thermal energy storage  

SciTech Connect (OSTI)

The objective of this study was to perform a conceptual engineering design and evaluation study and to develop a design for an adiabatic CAES system using water-compensated hard rock caverns for compressed air storage. The conceptual plant design was to feature underground containment for thermal energy storage and water-compensated hard rock caverns for high pressure air storage. Other design constraints included the selection of turbomachinery designs that would require little development and would therefore be available for near-term plant construction and demonstration. The design was to be based upon the DOE/EPRI/PEPCO-funded 231 MW/unit conventional CAES plant design prepared for a site in Maryland. This report summarizes the project, its findings, and the recommendations of the study team; presents the development and optimization of the plant heat cycle and the selection and thermal design of the thermal energy storage system; discusses the selection of turbomachinery and estimated plant performance and operational capability; describes the control system concept; and presents the conceptual design of the adiabatic CAES plant, the cost estimates and economic evaluation, and an assessment of technical and economic feasibility. Particular areas in the plant design requiring further development or investigation are discussed. It is concluded that the adiabatic concept appears to be the most attractive candidate for utility application in the near future. It is operationally viable, economically attractive compared with competing concerns, and will require relatively little development before the construction of a plant can be undertaken. It is estimated that a utility could start the design of a demonstration plant in 2 to 3 years if research regarding TES system design is undertaken in a timely manner. (LCL)

Hobson, M.J.

1981-11-01T23:59:59.000Z

164

Quantifying the Value of CSP with Thermal Energy Storage  

Broader source: Energy.gov [DOE]

This PowerPoint slide deck was originally presented at the SunShot Concentrating Solar Power Program Review by Paul Denholm and Mark Mehos of NREL on April 23, 2013. Entitled "Quantifying the Value of CSP with Thermal Energy Storage," the presenters seek to answer the question, "What is the addition of TES to a CSP plant actually worth?" Ultimately they conclude that CSP with TES can actually complement other variable generation sources including solar PV and act as an enabling technology to achieve higher overall penetration of renewable energy.

165

Bibliography of the seasonal thermal energy storage library  

SciTech Connect (OSTI)

The Main Listing is arranged alphabetically by the last name of the first author. Each citation includes the author's name, title, publisher, publication date, and where applicable, the National Technical Information Service (NTIS) number or other document number. The number preceding each citation is the identification number for that document in the Seasonal Thermal Energy Storage (STES) Library. Occasionally, one or two alphabetic characters are added to the identification number. These alphabetic characters indicate that the document is contained in a collection of papers, such as the proceedings of a conference. An Author Index and an Identification Number Index are included. (WHK)

Prater, L.S.; Casper, G.; Kawin, R.A.

1981-08-01T23:59:59.000Z

166

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

167

Thermal Energy Storage for Cooling of Commercial Buildings  

E-Print Network [OSTI]

For the ice storage system, during direct cooling, thethe building cooling load. In dynamic systems, ice is formedcooling/demand-limited storage / electric load management / full storage / ice

Akbari, H.

2010-01-01T23:59:59.000Z

168

Value of Concentrating Solar Power and Thermal Energy Storage  

SciTech Connect (OSTI)

This paper examines the value of concentrating solar power (CSP) and thermal energy storage (TES) in four regions in the southwestern United States. Our analysis shows that TES can increase the value of CSP by allowing more thermal energy from a CSP plant?s solar field to be used, by allowing a CSP plant to accommodate a larger solar field, and by allowing CSP generation to be shifted to hours with higher energy prices. We analyze the sensitivity of CSP value to a number of factors, including the optimization period, price and solar forecasting, ancillary service sales, capacity value and dry cooling of the CSP plant. We also discuss the value of CSP plants and TES net of capital costs.

Sioshansi, R.; Denholm, P.

2010-02-01T23:59:59.000Z

169

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

E-Print Network [OSTI]

solar-thermal- assisted hvac system. Energy and Buildings, [of a Solar-Assisted HVAC System with Thermal Storage A.of a solar-assisted HVAC system with thermal storage. Energy

Mammoli, Andrea

2014-01-01T23:59:59.000Z

170

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

the exhaust steam in an indirect condenser and rejects heatSteam Feedwater Heaters* - Installed Cost of the Dry-Cooling Tower and Condenser* -steam feedwater heaters Feedwater (50BoK, 14.5 MPa) I nd irect condenser

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

171

The integration of water loop heat pump and building structural thermal storage systems  

SciTech Connect (OSTI)

Many commercial buildings need heat in one part and, at the same time, cooling in another part. Even more common is the need for heating during one part of the day and cooling during another in the same spaces. If that energy could be shifted or stored for later use, significant energy might be saved. If a building's heating and cooling subsystems could be integrated with the building's structural mass and used to collect, store, and deliver energy, the energy might be save cost-effectively. To explore this opportunity, researchers at the Pacific Northwest Laboratory (PNL) examined the thermal interactions between the heating, ventilating, and air-conditioning (HVAC) system and the structure of a commercial building. Computer models were developed to simulate the interactions in an existing building located in Seattle, Washington, to determine how these building subsystems could be integrated to improve energy efficiency. The HVAC subsystems in the existing building were modeled. These subsystems consist of decentralized water-source heat pumps (WSHP) in a closed water loop, connected to cooling towers for heat rejection during cooling mode and boilers to augment heating. An initial base case'' computer model of the Seattle building, as-built, was developed. Metered data available for the building were used to calibrate this model to ensure that the analysis would provide information that closely reflected the operation of a real building. The HVAC system and building structure were integrated in the model using the concrete floor slabs as thermal storage media. The slabs may be actively charged during off-peak periods with the chilled water in the loop and then either actively or passively discharged into the conditioned space during peak periods. 21 refs., 37 figs., 17 tabs.

Marseille, T.J.; Schliesing, J.S.

1991-10-01T23:59:59.000Z

172

Designing an Optimal Urban Community Mix for an Aquifer Thermal Energy Storage System.  

E-Print Network [OSTI]

??This research examined what mix of building types result in the most efficient use of a technology known as Aquifer Thermal Energy Storage (ATES). Hourly… (more)

Zizzo, Ryan

2010-01-01T23:59:59.000Z

173

Encapsulation of High Temperature Phase Change Materials for Thermal Energy Storage.  

E-Print Network [OSTI]

??Thermal energy storage is a major contributor to bridge the gap between energy demand (consumption) and energy production (supply) by concentrating solar power. The utilization… (more)

Nath, Rupa

2012-01-01T23:59:59.000Z

174

Numerical Investigation of Stratified Thermal Storage Tank Applied in Adsorption Heat Pump Cycle.  

E-Print Network [OSTI]

??With the aid of the TES (Thermal Energy Storage) in the adsorption heat pump cycle, the COP of the system can be improved. Different geometrical… (more)

Taheri, Hadi

2014-01-01T23:59:59.000Z

175

Evaluation of diurnal thermal energy storage combined with cogeneration systems  

SciTech Connect (OSTI)

This report describes the results of an evaluation of thermal energy storage (TES) integrated with simple gas turbine cogeneration systems. The TES system captures and stores thermal energy from the gas turbine exhaust for immediate or future generation of process heat. Integrating thermal energy storage with conventional cogeneration equipment increases the initial cost of the combined system; but, by decoupling electric power and process heat production, the system offers the following two significant advantages: (1) Electric power can be generated on demand, irrespective of the process heat load profile, thus increasing the value of the power produced; (2) Although supplementary firing could be used to serve independently varying electric and process heat loads, this approach is inefficient. Integrating TES with cogeneration can serve the two independent loads while firing all fuel in the gas turbine. The study evaluated the cost of power produced by cogeneration and cogeneration/TES systems designed to serve a fixed process steam load. The value of the process steam was set at the levelized cost estimated for the steam from a conventional stand-alone boiler. Power costs for combustion turbine and combined-cycle power plants were also calculated for comparison. The results indicated that peak power production costs for the cogeneration/TES systems were between 25% and 40% lower than peak power costs estimated for a combustion turbine and between 15% and 35% lower than peak power costs estimated for a combined-cycle plant. The ranges reflect differences in the daily power production schedule and process steam pressure/temperature assumptions for the cases evaluated. Further cost reductions may result from optimization of current cogeneration/TES system designs and improvement in TES technology through future research and development.

Somasundaram, S.; Brown, D.R.; Drost, M.K.

1992-11-01T23:59:59.000Z

176

Numerical Investigation of the Effect of Chirality of Carbon Nanotube on the Interfacial Thermal Resistance  

E-Print Network [OSTI]

temperatures, molten salts and their eutectics are used in conventional high temperature thermal energy storage (TES) systems and also as coolants for energy conversion, such as in power tower configurations that are typically used in CSP applications. A major...

Hu, Yuzhu

2014-06-05T23:59:59.000Z

177

Energy Storage R&D: Thermal Management Studies and Modeling (Presentation)  

SciTech Connect (OSTI)

Here we summarize NREL's FY09 energy storage R&D studies in the areas of 1. thermal characterization and analysis, 2. cost, life, and performance trade-off studies, and 3. thermal abuse modeling.

Pesaran, A. A.

2009-05-01T23:59:59.000Z

178

Environmental risk assessment for aquifer thermal energy storage  

SciTech Connect (OSTI)

This report has been prepared by Pacific Northwest Laboratory at the request of the International Energy Agency (IEA). The US Department of Energy represents the United States in the IEA for Annex IV, the IEA task for research and development in aquifer thermal energy storage (ATES). Installation and operation of an ATES system is necessarily intrusive to ground-water resources. Therefore, governmental authorities usually require an environmental risk assessment to be performed before permission to construct an ATES system is granted. Writing an accurate statement of risk presupposes a knowledge of aquifer and ground-water characteristics and that an engineering feasibility study has taken place. Effective and logical presentation of the results of the risk assessment can expedite the grant of approval. Introductory remarks should address questions regarding why the ATES project has been proposed, what it is expected to accomplish, and what the expected benefits are. Next, the system configuration, including the aquifer, ATES plant, and well field, should be described in terms of size and location, design components, and thermal and hydraulic capacity. The final element of system design, the predicted annual operating cycle, needs to be described in sufficient detail to allow the reviewer to appreciate the net hydraulic, thermal, and hydrochemical effects imposed on the aquifer. Risks may be environmental or legal. Only after a reviewer has been introduced to the proposed system's design, operation, and scale can risk issues can be identified and weighed against the benefits of the proposed ATES system.

Hall, S.H.

1993-01-01T23:59:59.000Z

179

Environmental risk assessment for aquifer thermal energy storage  

SciTech Connect (OSTI)

This report has been prepared by Pacific Northwest Laboratory at the request of the International Energy Agency (IEA). The US Department of Energy represents the United States in the IEA for Annex IV, the IEA task for research and development in aquifer thermal energy storage (ATES). Installation and operation of an ATES system is necessarily intrusive to ground-water resources. Therefore, governmental authorities usually require an environmental risk assessment to be performed before permission to construct an ATES system is granted. Writing an accurate statement of risk presupposes a knowledge of aquifer and ground-water characteristics and that an engineering feasibility study has taken place. Effective and logical presentation of the results of the risk assessment can expedite the grant of approval. Introductory remarks should address questions regarding why the ATES project has been proposed, what it is expected to accomplish, and what the expected benefits are. Next, the system configuration, including the aquifer, ATES plant, and well field, should be described in terms of size and location, design components, and thermal and hydraulic capacity. The final element of system design, the predicted annual operating cycle, needs to be described in sufficient detail to allow the reviewer to appreciate the net hydraulic, thermal, and hydrochemical effects imposed on the aquifer. Risks may be environmental or legal. Only after a reviewer has been introduced to the proposed system`s design, operation, and scale can risk issues can be identified and weighed against the benefits of the proposed ATES system.

Hall, S.H.

1993-01-01T23:59:59.000Z

180

Title COMBINATION OF THERMAL SOLAR COLLECTORS, HEAT PUMP AND THERMAL ENERGY STORAGE FOR DWELLINGS IN BELGIUM.  

E-Print Network [OSTI]

The amount of available solar energy in Belgium is more than sufficient to meet local heat demand for space heating and domestic hot water in a dwelling. However, the timing of both the availability of solar energy and the need for thermal energy, match only to a limited extent. Therefore, compact storage of the surplus of thermal energy is a critical issue. Depending on the temperature at which this energy is available, directly from the sun or indirectly through the storage, different combinations with a heat pump can be considered. By combining solar energy with a heat pump one may benefit on both sides since the fraction of solar energy increases as well as the performance of the heat pump. The aim of this thesis is to select the best out of three configurations that combine thermal solar collectors, heat pump and thermal energy storage for heating purposes in dwellings in Belgium, based on model simulations. Energetic, exergetic and economic criteria are used to evaluate the different configurations, while thermal comfort and domestic hot water tap profiles should be met. One (or more) performance index (indices) is (are) defined enabling an objective comparison between different systems. Today several systems are already commercially available on the international market [4]. Since these systems consist of different components, the system design is a crucial issue. Therefore, special attention should be paid to the sizing of the individual components, the interaction of the components within the global system, and the strategy for operational control. To study the interaction with the building, three types of buildings (already defined in a previous project) are considered.

Contact Raf; De Herdt; Roel De Coninck; Filip Van Den Schoor; Lieve Helsen

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

Advanced Thermal Storage for Central Receivers with Supercritical Coolants  

SciTech Connect (OSTI)

The principal objective of the study is to determine if supercritical heat transport fluids in a central receiver power plant, in combination with ceramic thermocline storage systems, offer a reduction in levelized energy cost over a baseline nitrate salt concept. The baseline concept uses a nitrate salt receiver, two-tank (hot and cold) nitrate salt thermal storage, and a subcritical Rankine cycle. A total of 6 plant designs were analyzed, as follows: Plant Designation Receiver Fluid Thermal Storage Rankine Cycle Subcritical nitrate salt Nitrate salt Two tank nitrate salt Subcritical Supercritical nitrate salt Nitrate salt Two tank nitrate salt Supercritical Low temperature H2O Supercritical H2O Two tank nitrate salt Supercritical High temperature H2O Supercritical H2O Packed bed thermocline Supercritical Low temperature CO2 Supercritical CO2 Two tank nitrate salt Supercritical High temperature CO2 Supercritical CO2 Packed bed thermocline Supercritical Several conclusions have been drawn from the results of the study, as follows: 1) The use of supercritical H2O as the heat transport fluid in a packed bed thermocline is likely not a practical approach. The specific heat of the fluid is a strong function of the temperatures at values near 400 °C, and the temperature profile in the bed during a charging cycle is markedly different than the profile during a discharging cycle. 2) The use of supercritical CO2 as the heat transport fluid in a packed bed thermocline is judged to be technically feasible. Nonetheless, the high operating pressures for the supercritical fluid require the use of pressure vessels to contain the storage inventory. The unit cost of the two-tank nitrate salt system is approximately $24/kWht, while the unit cost of the high pressure thermocline system is nominally 10 times as high. 3) For the supercritical fluids, the outer crown temperatures of the receiver tubes are in the range of 700 to 800 °C. At temperatures of 700 °C and above, intermetallic compounds can precipitate between, and within, the grains of nickel alloys. The precipitation leads to an increase in tensile strength, and a decrease in ductility. Whether the proposed tube materials can provide the required low cycle fatigue life for the supercritical H2O and CO2 receivers is an open question. 4) A ranking of the plants, in descending order of technical and economic feasibility, is as follows: i) Supercritical nitrate salt and baseline nitrate salt: equal ratings ii) Low temperature supercritical H2O iii) Low temperature supercritical CO2 iv) High temperature supercritical CO2 v) High temperature supercritical H2O 5) The two-tank nitrate salt thermal storage systems are strongly preferred over the thermocline systems using supercritical heat transport fluids.

Kelly, Bruce D.

2010-06-15T23:59:59.000Z

182

Microwave impregnation of porous materials with thermal energy storage materials  

DOE Patents [OSTI]

A method for impregnating a porous, non-metallic construction material with a solid phase-change material is described. The phase-change material in finely divided form is spread onto the surface of the porous material, after which the porous material is exposed to microwave energy for a time sufficient to melt the phase-change material. The melted material is spontaneously absorbed into the pores of the porous material. A sealing chemical may also be included with the phase-change material (or applied subsequent to the phase-change material) to seal the surface of the porous material. Fire retardant chemicals may also be included with the phase-change materials. The treated construction materials are better able to absorb thermal energy and exhibit increased heat storage capacity.

Benson, David K. (Golden, CO); Burrows, Richard W. (Conifer, CO)

1993-01-01T23:59:59.000Z

183

Microwave impregnation of porous materials with thermal energy storage materials  

DOE Patents [OSTI]

A method for impregnating a porous, non-metallic construction material with a solid phase-change material is described. The phase-change material in finely divided form is spread onto the surface of the porous material, after which the porous material is exposed to microwave energy for a time sufficient to melt the phase-change material. The melted material is spontaneously absorbed into the pores of the porous material. A sealing chemical may also be included with the phase-change material (or applied subsequent to the phase-change material) to seal the surface of the porous material. Fire retardant chemicals may also be included with the phase-change materials. The treated construction materials are better able to absorb thermal energy and exhibit increased heat storage capacity.

Benson, D.K.; Burrows, R.W.

1993-04-13T23:59:59.000Z

184

Thermal Attacks on Storage Systems Nathanael Paul Sudhanva Gurumurthi David Evans  

E-Print Network [OSTI]

temperature, known as the thermal envelope. Exceeding the thermal envelope decreases the drive's reliability relationship between disk RPM and viscous heating. If the drive exceeds the thermal envelope, the drive canThermal Attacks on Storage Systems Nathanael Paul Sudhanva Gurumurthi David Evans University

Gurumurthi, Sudhanva

185

Review of simulation techniques for aquifer thermal energy storage (ATES)  

SciTech Connect (OSTI)

The storage of thermal energy in aquifers has recently received considerable attention as a means to conserve and more efficiently use energy supplies. The analysis of aquifer thermal energy storage (ATES) systems will rely on the results from mathematical and geochemical models. Therefore, the state-of-the-art models relevant to ATES was reviewed and evaluated. These models describe important processes active in ATES including ground-water flow, heat transport (heat flow), solute transport (movement of contaminants), and geochemical reactions. In general, available models of the saturated ground-water environment are adequate to address most concerns associated with ATES; that is, design, operation, and environmental assessment. In those cases where models are not adequate, development should be preceded by efforts to identify significant physical phenomena and relate model parameters to measurable quantities. Model development can then proceed with the expectation of an adequate data base existing for the model's eventual use. Review of model applications to ATES shows that the major emphasis has been on generic sensitivity analysis and site characterization. Assuming that models are applied appropriately, the primary limitation on model calculations is the data base used to construct the model. Numerical transport models are limited by the uncertainty of subsurface data and the lack of long-term historical data for calibration. Geochemical models are limited by the lack of thermodynamic data for the temperature ranges applicable to ATES. Model applications undertaken with data collection activities on ATES sites should provide the most important contributions to the understanding and utilization of ATES. Therefore, the primary conclusion of this review is that model application to field sites in conjunction with data collection activities is essential to the development of this technology.

Mercer, J.W.; Faust, C.R.; Miller, W.J.; Pearson, F.J. Jr.

1981-03-01T23:59:59.000Z

186

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

process configurations for solar power plants with sensible-heatsolar power plant with sensible-heat storage since the chemical~heat storage processsolar power plant with a sulfur-oxide storage process. chemical~heat

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

187

EXPERIMENTAL AND THEORETICAL STUDIES OF THERMAL ENERGY STORAGE IN AQUIFERS  

E-Print Network [OSTI]

1971, storage of Solar Energy in a Bandy- Gravel Ground. 2.Aquifer Storage of Heated Water: A Field Experuuent. GroundStorage of Heated Water: Part II - Numerical Simulation of Field Results. Ground

Tsang, Chin Fu

2011-01-01T23:59:59.000Z

188

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

189

A Comparison of Open Versus Closed Systems in Thermal Storage Applications  

E-Print Network [OSTI]

The use of thermal storage, by its very nature, requires a large storage vessel. Depending upon the technology employed, this can vary from as little as 1.6cuft./ton-hour, up to 15cuft./ton-hour. The result can be storage tanks with volumes...

Salbodkin, A.

1990-01-01T23:59:59.000Z

190

A Novel Integrated Frozen Soil Thermal Energy Storage and Ground-Source Heat Pump System  

E-Print Network [OSTI]

In this paper, a novel integrated frozen soil thermal energy storage and ground-source heat pump (IFSTS&GSHP) system in which the GHE can act as both cold thermal energy storage device and heat exchanger for GSHP is first presented. The IFSTS...

Jiang, Y.; Yao, Y.; Rong, L.; Ma, Z.

2006-01-01T23:59:59.000Z

191

Comparison of closed and open thermochemical processes, for long-term thermal energy storage applications  

E-Print Network [OSTI]

1 Comparison of closed and open thermochemical processes, for long-term thermal energy storage-term thermal storage, second law analysis * Corresponding author: E-mail: mazet@univ-perp.fr Nomenclature c Energy Tecnosud, Rambla de la thermodynamique, 66100 Perpignan, France b Université de Perpignan Via

Paris-Sud XI, Université de

192

Efficient Heat Storage Materials: Metallic Composites Phase-Change Materials for High-Temperature Thermal Energy Storage  

SciTech Connect (OSTI)

HEATS Project: MIT is developing efficient heat storage materials for use in solar and nuclear power plants. Heat storage materials are critical to the energy storage process. In solar thermal storage systems, heat can be stored in these materials during the day and released at night—when the sun’s not out—to drive a turbine and produce electricity. In nuclear storage systems, heat can be stored in these materials at night and released to produce electricity during daytime peak-demand hours. MIT is designing nanostructured heat storage materials that can store a large amount of heat per unit mass and volume. To do this, MIT is using phase change materials, which absorb a large amount of latent heat to melt from solid to liquid. MIT’s heat storage materials are designed to melt at high temperatures and conduct heat well—this makes them efficient at storing and releasing heat and enhances the overall efficiency of the thermal storage and energy-generation process. MIT’s low-cost heat storage materials also have a long life cycle, which further enhances their efficiency.

None

2011-11-21T23:59:59.000Z

193

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

194

The Effects of Nanoparticle Augmentation of Nitrate Thermal Storage Materials for Use in Concentrating Solar Power Applications  

E-Print Network [OSTI]

The Department of Energy funded a project to determine if the specific heat of thermal energy storage materials could be improved by adding nanoparticles. The standard thermal energy storage materials are molten salts. The chosen molten salt was a...

Betts, Matthew

2011-08-08T23:59:59.000Z

195

Development and characterization of a new MgSO4-zeolite composite for long-term thermal energy storage  

E-Print Network [OSTI]

the material. For that specific purpose, a new thermal energy storage composite material has been developed expanded structure for MgSO4, with energy densities of 150-400 kWh.m-3 at a storage temperature compatible. Keywords: thermal energy storage; thermochemical process; long-term storage; zeolites; magnesium sulphate

196

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 Der energy density of the reactor, Jm -3 thermal conductivity, Wm -1 .K -1 G reactive gas

Paris-Sud XI, Université de

197

Relationship of regional water quality to aquifer thermal energy storage  

SciTech Connect (OSTI)

Ground-water quality and associated geologic characteristics may affect the feasibility of aquifer thermal energy storage (ATES) system development in any hydrologic region. This study sought to determine the relationship between ground-water quality parameters and the regional potential for ATES system development. Information was collected from available literature to identify chemical and physical mechanisms that could adversely affect an ATES system. Appropriate beneficiation techniques to counter these potential geochemical and lithologic problems were also identified through the literature search. Regional hydrology summaries and other sources were used in reviewing aquifers of 19 drainage regions in the US to determine generic geochemical characteristics for analysis. Numerical modeling techniques were used to perform geochemical analyses of water quality from 67 selected aquifers. Candidate water resources regions were then identified for exploration and development of ATES. This study identified six principal mechanisms by which ATES reservoir permeability may be impaired: (1) particulate plugging, (2) chemical precipitation, (3) liquid-solid reactions, (4) formation disaggregation, (5) oxidation reactions, and (6) biological activity. Specific proven countermeasures to reduce or eliminate these effects were found. Of the hydrologic regions reviewed, 10 were identified as having the characteristics necessary for ATES development: (1) Mid-Atlantic, (2) South-Atlantic Gulf, (3) Ohio, (4) Upper Mississippi, (5) Lower Mississippi, (6) Souris-Red-Rainy, (7) Missouri Basin, (8) Arkansas-White-Red, (9) Texas-Gulf, and (10) California.

Allen, R.D.

1983-11-01T23:59:59.000Z

198

An investigation of cement mortar thermal storage characteristics  

E-Print Network [OSTI]

energy storage characteristics of solid cement mortar cylinders. Two var1a- tions 1nvolving mechanically induced porosity were also investigated. Rocks, a commonly used sensible heat storage material, were tested to prov1de a reference for the cement... mortar. A numer1cal model, analogous to program available for rock bed storage systems, simulating the cement mortar cylinder storage section was developed. Heat transfer coefficients were calculated from the experimental data for use in the model...

Davis, Glenn Baker

2012-06-07T23:59:59.000Z

199

Solar Power Tower Design Basis Document, Revision 0  

SciTech Connect (OSTI)

This report contains the design basis for a generic molten-salt solar power tower. A solar power tower uses a field of tracking mirrors (heliostats) that redirect sunlight on to a centrally located receiver mounted on top a tower, which absorbs the concentrated sunlight. Molten nitrate salt, pumped from a tank at ground level, absorbs the sunlight, heating it up to 565 C. The heated salt flows back to ground level into another tank where it is stored, then pumped through a steam generator to produce steam and make electricity. This report establishes a set of criteria upon which the next generation of solar power towers will be designed. The report contains detailed criteria for each of the major systems: Collector System, Receiver System, Thermal Storage System, Steam Generator System, Master Control System, and Electric Heat Tracing System. The Electric Power Generation System and Balance of Plant discussions are limited to interface requirements. This design basis builds on the extensive experience gained from the Solar Two project and includes potential design innovations that will improve reliability and lower technical risk. This design basis document is a living document and contains several areas that require trade-studies and design analysis to fully complete the design basis. Project- and site-specific conditions and requirements will also resolve open To Be Determined issues.

ZAVOICO,ALEXIS B.

2001-07-01T23:59:59.000Z

200

Thermal Energy Storage in Metal Foams filled with Paraffin Wax.  

E-Print Network [OSTI]

??Phase change materials (PCM) such as paraffin wax are known to exhibit slow thermal response due to their relatively low thermal conductivity. In this study,… (more)

Vadwala, Pathik

2012-01-01T23:59:59.000Z

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

Thermal Energy Storage: It's not Just for Electric Cost Savings Anymore  

E-Print Network [OSTI]

Large cool Thermal Energy Storage (TES), typically ice TES or chilled water (CHW) TES, has traditionally been thought of, and used for, managing time-of-day electricity use to reduce the cost associated with electric energy and demand charges...

Andrepont, J. S.

2014-01-01T23:59:59.000Z

202

Research on Thermal Properties in a Phase Change Wallboard Room Based on Air Conditioning Cold Storage  

E-Print Network [OSTI]

of Science and Technology Press, 1996. [2] J.Kelly kissock, J Michael Hannig, Thomas I. Whitney et al. Early results from testing phase change wallboard, IEA Annex10? phase change materials and chemical reactions for thermal energy storage first...

Feng, G.; Li, W.; Chen, X.

2006-01-01T23:59:59.000Z

203

Analysis of a Retrofitted Thermal Energy Storage Air-conditioning System of a Marine Museum.  

E-Print Network [OSTI]

??Thermal energy storage(TES) air-conditioning system is a electrical load management technology with great potential to shift load from peak to off-peak utility periods. TES is… (more)

Yu, Po-wen

2005-01-01T23:59:59.000Z

204

Energy Comparison Between Conventional and Chilled Water Thermal Storage Air Conditioning Systems  

E-Print Network [OSTI]

, encouraged by government subsidies and driven by the rapid and continual expansion in building construction, urban development, and the heavy reliance on Air Conditioning (AC) systems for the cooling of buildings. The Chilled Water Thermal Storage (CWTS...

Sebzali, M.; Hussain, H. J.; Ameer, B.

2010-01-01T23:59:59.000Z

205

State-of-the-Art Thermal Energy Storage Retrofit at a Large Manufacturing Facility  

E-Print Network [OSTI]

This paper will describe the existing conditions, strategic planning, feasibility study, economic analysis, design, specification, construction, and project management for the 2.9 megawatt “full shift” chilled water thermal energy storage retrofit...

Fiorino, D.

206

Heat recovery and thermal storage : a study of the Massachusetts State Transportation Building  

E-Print Network [OSTI]

A study of the energy system at the Massachusetts State Transportation Building was conducted. This innovative energy system utilizes internal-source heat pumps and a water thermal storage system to provide building heating ...

Bjorklund, Abbe Ellen

1986-01-01T23:59:59.000Z

207

Optimal operation and design of solar-thermal energy storage systems  

E-Print Network [OSTI]

The present thesis focuses on the optimal operation and design of solar-thermal energy storage systems. First, optimization of time-variable operation to maximize revenue through selling and purchasing electricity to/from ...

Lizarraga-García, Enrique

2012-01-01T23:59:59.000Z

208

COBRA-SFS thermal analysis of a sealed storage cask for the Monitored Retrievable Storage of spent fuel  

SciTech Connect (OSTI)

The COBRA-SFS (Spent Fuel Storage) computer code was used to predict temperature distributions in a concrete Sealed Storage Cask (SSC). This cask was designed for the Department of Energy in the Monitored Retrievable Storage (MRS) program for storage of spent fuel from commercial power operations. Analytical results were obtained for nominal operation of the SSC with spent fuel from 36 PWR fuel assemblies consolidated in 12 cylindrical canisters. Each canister generates 1650 W of thermal power. A parametric study was performed to assess the effects on cask thermal performance of thermal conductivity of the concrete, the fin material, and the amount of radial reinforcing steel bars (rebar). Seven different cases were modeled. The results of the COBRA-SFS analysis of the current cask design predict that the peak fuel cladding temperature in the SSC will not exceed the 37/sup 0/C design limit for the maximum spent fuel load of 19.8 kW and a maximum expected ambient temperature of 37.8/sup 0/C (100/sup 0/F). The results of the parametric analyses illustrate the importance of material selection and design optimization with regard to the SSC thermal performance.

Rector, D.R.; Wheeler, C.L.

1986-01-01T23:59:59.000Z

209

Optimal Control of Harvesting Ice Thermal Storage Systems  

E-Print Network [OSTI]

for optimal control of a harvesting ice storage system. A simplified procedure is used to develop 24 hour load data. Example installations will be shown....

Knebel, D. E.

1988-01-01T23:59:59.000Z

210

Comparison of the percent recoveries of activated charcoal and Spherocarb after storage utilizing thermal desorption  

E-Print Network [OSTI]

COMPARISON OF THE PERCENT RECOVERIES OF ACTIVATED CHARCOAL AND SPHEROCARB AFTER STORAGE UTILIZING THERMAL DESORPTION A Thesis by Paul Emery Sti dham Submitted to the Graduate College of Texas Al!M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE December 1980 Major Subject: Industrial Hygiene COMPARISON OF THE PERCENT RECOVERIES OF ACTIVATED CHARCOAL AND SPHEROCARB AFTER STORAGE UTILIZING THERMAL DESORPTI ON A Thesis by Paul Emery Stidham...

Stidham, Paul Emery

1980-01-01T23:59:59.000Z

211

Thermal Energy Storage/Heat Recovery and Energy Conservation in Food Processing  

E-Print Network [OSTI]

discharges can be made more economically attrac tank holding several thousand gallons of water tive by incorporating thermal energy storage in a maintained at 128-130?F. This scald tank is con heat recovery system. Thermal energy storage can stantly... the ultimate energy end use. of wasting this hot water to the plant drain, a heat A project conducted by the Georgia Tech exchanger was installed at the Gold Kist plant to Engineering Experiment Station to demonstrate preheat scald tank makeup water...

Combes, R. S.; Boykin, W. B.

1980-01-01T23:59:59.000Z

212

Wave propagation and thermodynamic losses in packed-bed thermal reservoirs for energy storage  

E-Print Network [OSTI]

 .     The  reservoirs  of  interest  here  typically  comprise  a  cylindrical  pressure  vessel  containing  the  solid  storage  medium  in  the  form  of  a  packed  bed  of  pebbles  or  gravel,  or  a  uniform... WAVE  PROPAGATION  AND  THERMODYNAMIC  LOSSES  IN  PACKED-­?BED  THERMAL  RESERVOIRS  FOR  ENERGY  STORAGE       Alexander  White1,  Joshua  McTigue1,  Christos  Markides2   1  Cambridge  University...

White, Alexander; McTigue, Joshua; Markides, Christos

2014-03-26T23:59:59.000Z

213

INORGANIC NANOPARTICLES AS PHASE-CHANGE MATERIALS FOR LARGE-SCALE THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

INORGANIC NANOPARTICLES AS PHASE-CHANGE MATERIALS FOR LARGE- SCALE THERMAL ENERGY STORAGE Miroslaw storage performance. The expected immediate outcome of this effort is the demonstration of high-energy generation at high efficiency could revolutionize the development of solar energy. Nanoparticle-based phase

Pennycook, Steve

214

STP-ECRTS - THERMAL AND GAS ANALYSES FOR SLUDGE TRANSPORT AND STORAGE CONTAINER (STSC) STORAGE AT T PLANT  

SciTech Connect (OSTI)

The Sludge Treatment Project (STP) is responsible for the disposition of sludge contained in the six engineered containers and Settler tank within the 105-K West (KW) Basin. The STP is retrieving and transferring sludge from the Settler tank into engineered container SCS-CON-230. Then, the STP will retrieve and transfer sludge from the six engineered containers in the KW Basin directly into a Sludge Transport and Storage Containers (STSC) contained in a Sludge Transport System (STS) cask. The STSC/STS cask will be transported to T Plant for interim storage of the STSC. The STS cask will be loaded with an empty STSC and returned to the KW Basin for loading of additional sludge for transportation and interim storage at T Plant. CH2MHILL Plateau Remediation Company (CHPRC) contracted with Fauske & Associates, LLC (FAI) to perform thermal and gas generation analyses for interim storage of STP sludge in the Sludge Transport and Storage Container (STSCs) at T Plant. The sludge types considered are settler sludge and sludge originating from the floor of the KW Basin and stored in containers 210 and 220, which are bounding compositions. The conditions specified by CHPRC for analysis are provided in Section 5. The FAI report (FAI/10-83, Thermal and Gas Analyses for a Sludge Transport and Storage Container (STSC) at T Plant) (refer to Attachment 1) documents the analyses. The process considered was passive, interim storage of sludge in various cells at T Plant. The FATE{trademark} code is used for the calculation. The results are shown in terms of the peak sludge temperature and hydrogen concentrations in the STSC and the T Plant cell. In particular, the concerns addressed were the thermal stability of the sludge and the potential for flammable gas mixtures. This work was performed with preliminary design information and a preliminary software configuration.

CROWE RD; APTHORPE R; LEE SJ; PLYS MG

2010-04-29T23:59:59.000Z

215

Thermal Energy Storage for Space Cooling--Federal Technology Alert  

SciTech Connect (OSTI)

Cool storage technology can be used to significantly reduce energy costs by allowing energy-intensive, electrically driven cooling equipment to be predominantly operated during off peak hours when electricity rates are lower. This Federal Technology Alert, which is sponsored by DOE's Federal Energy Management Program (FEMP), describes the basic types of cool storage technologies and cooling system integration options. In addition, it defines the savings potential in the federal sector, presents application advice, and describes the performance experience of specific federal users. The results of a case study of a GSA building using cool storage technology are also provided.

Brown, Daryl R

2000-12-31T23:59:59.000Z

216

Thermal analysis of adsorptive natural gas storages during dynamic charge phase at room temperature  

SciTech Connect (OSTI)

The thermal behavior of an adsorptive natural gas (ANG) vessel pressurized continuously with light hydrocarbon gases and their mixture at 27 C was analyzed using two different activated carbons. Activated carbon AC-L showed better isothermal storage capacity than AC-D due to its sufficient porous structure. However, higher adsorption capacity claimed more extreme thermal fluctuation represented by a temperature rise of 99.2 C at the center region of the bed charged continuously with methane at 1 L min{sup -1} up to pressure of 4 MPa, corresponding to 82.5 C in AC-D bed. Higher charge rate of 5 L min{sup -1} claimed severer thermal fluctuation of 116 C in AC-L/methane system calling for a serious reduction of 26.9% in the dynamic storage capacity with respect to the isothermal storage capacity. This reduction brought the storage system to a working pressure of about 2.5 MPa rather than the desired working pressure of {proportional_to}4 MPa (about 40% reduction in storage pressure). The severest temperature rise was at the center region caused by bed poor thermal conductivity leading to limited heat transfer. High ethane and propane portions in natural gas may contribute to the thermal fluctuation of the storage system as their heats of adsorption are higher than that for methane. (author)

Ridha, Firas N.; Yunus, Rosli M.; Rashid, Mohd. [Department of Chemical Engineering, University of Technology Malaysia, 81310 UTM, Skudai, Johor (Malaysia); Ismail, Ahmad F. [Department of Gas Engineering, University of Technology Malaysia, 81310 UTM, Skudai, Johor (Malaysia)

2007-10-15T23:59:59.000Z

217

Thermal control system and method for a passive solar storage wall  

DOE Patents [OSTI]

The invention provides a system and method for controlling the storing and elease of thermal energy from a thermal storage wall wherein said wall is capable of storing thermal energy from insolation of solar radiation. The system and method includes a device such as a plurality of louvers spaced a predetermined distance from the thermal wall for regulating the release of thermal energy from the thermal wall. This regulating device is made from a material which is substantially transparent to the incoming solar radiation so that when it is in any operative position, the thermal storage wall substantially receives all of the impacting solar radiation. The material in the regulating device is further capable of being substantially opaque to thermal energy so that when the device is substantially closed, thermal release of energy from the storage wall is substantially minimized. An adjustment device is interconnected with the regulating mechanism for selectively opening and closing it in order to regulate the release of thermal energy from the wall.

Ortega, Joseph K. E. (Westminister, CO)

1984-01-01T23:59:59.000Z

218

Thermal Stability and Hydrogen Release Kinetics of Ammonia Borane Under Vehicle Storage Conditions  

SciTech Connect (OSTI)

Ammonia borane (AB) is a promising chemical hydrogen storage material for H2 powered fuel-cell vehicles (FCVs) owing to its considerable hydrogen density and stability under typical ambient conditions. U.S. Department of Energy (DOE) Technical Targets for on-board hydrogen storage systems in 2015 provide a requirement for operating temperatures in full-sun exposure as high as 60°C (50°C by 2010) [1]. The purpose of this work is to investigate the thermal stability of solid AB during storage on-board a FCV at 40 to 60°C. Calorimeter measurements and calculation models are used to estimate AB thermal stability and H2 release kinetics under isothermal, adiabatic, and cooled storage conditions as a function of storage time, temperature, and AB purity.

Rassat, Scot D.; Smith, R. Scott; Aardahl, Christopher L.; Autrey, Thomas; Chin, Arthur A.; Magee, Joseph W.; VanSciver, Gary R.; Lipiecki, Frank J.

2006-09-01T23:59:59.000Z

219

Thermoeconomic optimization of sensible heat thermal storage for cogenerated waste-to-energy recovery  

SciTech Connect (OSTI)

This paper investigates the feasibility of employing thermal storage for cogenerated waste-to-energy recovery such as using mass-burning water-wall incinerators and topping steam turbines. Sensible thermal storage is considered in rectangular cross-sectioned channels through which is passed unused process steam at 1,307 kPa/250 C (175 psig/482 F) during the storage period and feedwater at 1,307 kPa/102 C (175 psig/216 F) during the recovery period. In determining the optimum storage configuration, it is found that the economic feasibility is a function of mass and specific heat of the material and surface area of the channel as well as cost of material and fabrication. Economic considerations included typical cash flows of capital charges, energy revenues, operation and maintenance, and income taxes. Cast concrete is determined to be a potentially attractive storage medium.

Abdul-Razzak, H.A. [Texas A and M Univ., Kingsville, TX (United States). Dept. of Mechanical and Industrial Engineering; Porter, R.W. [Illinois Inst. of Tech., chicago, IL (United States). Dept. of Mechanical and Aerospace Engineering

1995-10-01T23:59:59.000Z

220

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

Summary of the Proposed Solar Power Plant Design The ImpactGenerated by this Solar Power Plant The Impact of StorageVessel Design on the Solar Power Plant III I;l f> (I Q I)

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

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

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network [OSTI]

of the Proposed Solar Power Plant Design The Impact ofGenerated by this Solar Power Plant The Impact of StorageDesign on the Solar Power Plant III I;l f> (I Q I) II (I

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

222

Development and Demonstration of an Innovative Thermal Energy Storage System for Baseload Power Generation  

SciTech Connect (OSTI)

The objective of this project is to research and develop a thermal energy storage system (operating range 3000C ���¢�������� 450 0C ) based on encapsulated phase change materials (PCM) that can meet the utility-scale base-load concentrated solar power plant requirements at much lower system costs compared to the existing thermal energy storage (TES) concepts. The major focus of this program is to develop suitable encapsulation methods for existing low-cost phase change materials that would provide a cost effective and reliable solution for thermal energy storage to be integrated in solar thermal power plants. This project proposes a TES system concept that will allow for an increase of the capacity factor of the present CSP technologies to 75% or greater and reduce the cost to less than $20/kWht.

D. Y. Goswami

2012-09-04T23:59:59.000Z

223

Design considerations for concentrating solar power tower systems employing molten salt.  

SciTech Connect (OSTI)

The Solar Two Project was a United States Department of Energy sponsored project operated from 1996 to 1999 to demonstrate the coupling of a solar power tower with a molten nitrate salt as a heat transfer media and for thermal storage. Over all, the Solar Two Project was very successful; however many operational challenges were encountered. In this work, the major problems encountered in operation of the Solar Two facility were evaluated and alternative technologies identified for use in a future solar power tower operating with a steam Rankine power cycle. Many of the major problems encountered can be addressed with new technologies that were not available a decade ago. These new technologies include better thermal insulation, analytical equipment, pumps and values specifically designed for molten nitrate salts, and gaskets resistant to thermal cycling and advanced equipment designs.

Moore, Robert Charles; Siegel, Nathan Phillip; Kolb, Gregory J.; Vernon, Milton E.; Ho, Clifford Kuofei

2010-09-01T23:59:59.000Z

224

High Density Thermal Energy Storage with Supercritical Fluids...  

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

concept using supercritical fluids - Enhanced penetration of solar thermal for baseload power - Waste heat capture * Presents feasibility looking at thermodynamics of...

225

Diurnal cool thermal energy storage: Research programs, technological developments, and commercial status  

SciTech Connect (OSTI)

This report presents an overview of the major federal and private research and development efforts in diurnal cool thermal energy storage for electric load management in buildings. Included are brief technical descriptions and research histories of the technologies and applications of cool thermal storage. The goals, accomplishments, and funding levels of major thermal storage research programs also are summarized. The report concludes with the results of recent field performance evaluations of cool thermal storage installations and a discussion of the current commercial status of thermal storage equipment, including utility participation programs. This report was sponsored by the Technology and Consumer Products (TCP) Division within the Office of Conservation of the US Department of Energy. This report is part of TCP's ongoing effort to examine and evaluate technology developments and research efforts in the areas of lighting, space heating and cooling, water heating, refrigeration, and other building energy conversion equipment. Information obtained through this effort is used as an input in developing the US research agenda in these areas.

Wise, M A

1992-01-01T23:59:59.000Z

226

Summary Report for Concentrating Solar Power Thermal Storage Workshop: New Concepts and Materials for Thermal Energy Storage and Heat-Transfer Fluids, May 20, 2011  

SciTech Connect (OSTI)

This document summarizes a workshop on thermal energy storage for concentrating solar power (CSP) that was held in Golden, Colorado, on May 20, 2011. The event was hosted by the U.S. Department of Energy (DOE), the National Renewable Energy Laboratory, and Sandia National Laboratories. The objective was to engage the university and laboratory research communities to identify and define research directions for developing new high-temperature materials and systems that advance thermal energy storage for CSP technologies. This workshop was motivated, in part, by the DOE SunShot Initiative, which sets a very aggressive cost goal for CSP technologies -- a levelized cost of energy of 6 cents per kilowatt-hour by 2020 with no incentives or credits.

Glatzmaier, G.

2011-08-01T23:59:59.000Z

227

Advanced Thermal Storage System with Novel Molten Salt: December 8, 2011 - April 30, 2013  

SciTech Connect (OSTI)

Final technical progress report of Halotechnics Subcontract No. NEU-2-11979-01. Halotechnics has demonstrated an advanced thermal energy storage system with a novel molten salt operating at 700 degrees C. The molten salt and storage system will enable the use of advanced power cycles such as supercritical steam and supercritical carbon dioxide in next generation CSP plants. The salt consists of low cost, earth abundant materials.

Jonemann, M.

2013-05-01T23:59:59.000Z

228

Comparison of domestic olivine and European magnesite for electrically charged thermal energy storage  

SciTech Connect (OSTI)

Electrically charged thermal energy storage (TES) heaters employing high heat capacity ceramic refractories for sensible heat storage have been in use in Europe for several years. With these devices, low cost off-peak electrical energy is stored by heating a storage core composed of ceramic material to approximately 800/sup 0/C. During the peak period, no electrical energy is used as the building heating needs are supplied by extracting the stored energy from the core by forced air circulation. The recent increase in use of off-peak TES units in the U.S. has led to the search for a domestic supply of high heat capacity ceramic refractory material. North Carolina's extensive but underutilized supply of refractory grade olivine has been proposed as a source of storage material for these units. In this paper the suitability of North Carolina olivine for heat storage applications is assessed by comparing its thermal performance with that of European materials. Using the method of ASHRAE Standard 94.2, the thermal performance of two commercially available room-size TES units was determined experimentally with two different storage materials, North Carolina olivine and German magnesite. Comparisons are made and conclusions are drawn.

Laster, W.R.; Gay, B.M.; Palmour, H.; Schoenhals, R.J.

1982-01-01T23:59:59.000Z

229

Method of making improved gas storage carbon with enhanced thermal conductivity  

DOE Patents [OSTI]

A method of making an adsorbent carbon fiber based monolith having improved methane gas storage capabilities is disclosed. Additionally, the monolithic nature of the storage carbon allows it to exhibit greater thermal conductivity than conventional granular activated carbon or powdered activated carbon storage beds. The storage of methane gas is achieved through the process of physical adsorption in the micropores that are developed in the structure of the adsorbent monolith. The disclosed monolith is capable of storing greater than 150 V/V of methane [i.e., >150 STP (101.325 KPa, 298K) volumes of methane per unit volume of storage vessel internal volume] at a pressure of 3.5 MPa (500 psi).

Burchell, Timothy D. (Oak Ridge, TN); Rogers, Michael R. (Knoxville, TN)

2002-11-05T23:59:59.000Z

230

Legal and regulatory issues affecting the aquifer thermal energy storage concept  

SciTech Connect (OSTI)

A number of legal and regulatory issus that potentially can affect implementation of the Aquifer Thermal Energy Storage (ATES) concept are examined. This concept involves the storage of thermal energy in an underground aquifer until a later date when it can be effectively utilized. Either heat energy or chill can be stored. Potential end uses of the energy include district space heating and cooling, industrial process applications, and use in agriculture or aquaculture. Issues are examined in four categories: regulatory requirements, property rights, potential liability, and issues related to heat or chill delivery.

Hendrickson, P.L.

1980-10-01T23:59:59.000Z

231

Analysis and System Design of a Large Chiller Plant for Korea, with or without Thermal Storage  

E-Print Network [OSTI]

% was provided by thermal storage as in the previous scheme. Electric centrifugal chillers, two (2) at 950 tons each, were still required to charge the ice tanks at night, because gas-fired absorption chillers cannot make the 28°F (-2.2"C) glycol solution... simulated. C. Electric Centrifugal Chillers with Thermal Storage: Local code requires that a maximum of 60% of the peak cooling load be satisfied "real-time" by electricity. Therefore, two (2) 1,020-ton electric centrifugal chillers provided 2,040 tons...

Levin, C.; Simmonds, P.

1996-01-01T23:59:59.000Z

232

TIGER:Thermal-Aware File Assignment in Storage Clusters  

E-Print Network [OSTI]

% of total energy consumption [4]. Energy and cooling cost caused by data nodes motivate us to study file for clusters by offering about 10 to 15 percent cooling energy savings without significantly degrading I--In this paper, we present thermal-aware file assign- ment technique called TIGER for reducing cooling cost

Qin, Xiao

233

Loss analysis of thermal reservoirs for electrical energy storage schemes  

E-Print Network [OSTI]

phase. HX1 and HX2 are heat exchangers used to reject heat at near-ambient conditions. The compressor, C, and expander, E, may be turbomachines as in Ref. [5] or reciprocating devices, as in Ref. [4] 33 2 Schematic view of heat transfer within... are heat exchangers used to reject heat at near-ambient conditions. The compressor, C, and expander, E, may be turboma- chines as in Ref. [5] or reciprocating devices, as in Ref. [4] 33 T2 x hot 1 T ? T ? T x gas front storage m edia Tg + Tg sT Q . ? Tg...

White, Alexander

2011-05-14T23:59:59.000Z

234

Thermal Modeling Studies for Active Storage Modules in the Calvert Cliffs ISFSI  

SciTech Connect (OSTI)

Temperature measurements obtained for two storage modules in the Calvert Cliffs Nuclear Power Station’s Independent Spent Fuel Storage Installation (ISFSI) as part of the Used Fuel Disposition Campaign of the Department of Energy (DOE) were used to perform validation and sensitivity studies on detailed computational fluid dynamics (CFD) models of the concrete storage modules, including the dry storage canister within the modules. The storage modules in the Calvert Cliffs Nuclear Power Station’s ISFSI are a site-specific version of the standard NUHOMS® HSM. The two modules inspected each contained a 24P DSC loaded with 24 CE 14x14 spent fuel assemblies. The thermal analysis was performed using the STAR-CCM+ package, and the models developed for the specific ISFSI modules yielded temperature predictions in actual storage conditions for the concrete structure, the DSC and its contents, including preliminary estimates of fuel cladding temperatures for the used nuclear fuel. The results of this work demonstrate that existing CFD modeling tools can be used to obtain reasonable and accurate detailed representations of spent fuel storage systems with realistic decay heat loadings when the model omits specific conservatisms and bounding assumptions normally used in design-basis and safety-basis calculations. This paper presents sensitivity studies on modeling detail (for the storage module and the DSC), boundary conditions, and decay heat load, to evaluate the effect of the modeling approach on predicted temperatures and temperature distributions. Because nearly all degradation mechanisms for materials and structures comprising dry storage and transportation systems are dependent on temperature, accurate characterization of local temperatures and temperature gradients that the various components of these systems will experience over the entire storage period has been identified as a primary requirement for evaluation of very long term storage of used nuclear fuel.

Adkins, Harold E.; Fort, James A.; Suffield, Sarah R.; Cuta, Judith M.; Collins, Brian A.

2013-06-14T23:59:59.000Z

235

Thermal Modeling of NUHOMS HSM-15 and HSM-1 Storage Modules at Calvert Cliffs Nuclear Power Station ISFSI  

SciTech Connect (OSTI)

As part of the Used Fuel Disposition Campaign of the Department of Energy (DOE), visual inspections and temperature measurements were performed on two storage modules in the Calvert Cliffs Nuclear Power Station’s Independent Spent Fuel Storage Installation (ISFSI). Detailed thermal models models were developed to obtain realistic temperature predictions for actual storage systems, in contrast to conservative and bounding design basis calculations.

Suffield, Sarah R.; Fort, James A.; Adkins, Harold E.; Cuta, Judith M.; Collins, Brian A.; Siciliano, Edward R.

2012-10-01T23:59:59.000Z

236

Cost Optimal Operation of Thermal Energy Storage System with Real-Time Prices  

E-Print Network [OSTI]

Cost Optimal Operation of Thermal Energy Storage System with Real-Time Prices Toru Kashima, Member of the result [4]. The same can be said for time varying real-time prices. Real-time energy pricing is not yet such as chillers. Energy resources such as electricity or natural gas are bought from suppliers at certain prices

237

Economical Analysis of a Groundwater Source Heat Pump with Water Thermal Storage System  

E-Print Network [OSTI]

The paper is based on a chilled and heat source for the building which has a total area of 140000m2 in the suburb of Beijing. By comparing the groundwater source heat pump of water thermal storage (GHPWTS) with a conventional chilled and heat source...

Zhou, Z.; Xu, W.; Li, J.; Zhao, J.; Niu, L.

2006-01-01T23:59:59.000Z

238

Development of encapsulated lithium hydride thermal energy storage for space power systems  

SciTech Connect (OSTI)

Inclusion of thermal energy storage in a pulsed space power supply will reduce the mass of the heat rejection system. In this mode, waste heat generated during the brief high-power burst operation is placed in the thermal store; later, the heat in the store is dissipated to space via the radiator over the much longer nonoperational period of the orbit. Thus, the radiator required is of significantly smaller capacity. Scoping analysis indicates that use of lithium hydride as the thermal storage medium results in system mass reduction benefits for burst periods as long as 800 s. A candidate design for the thermal energy storage component utilizes lithium hydride encapsulated in either 304L stainless steel or molybdenum in a packed-bed configuration with a lithium or sodium-potassium (NaK) heat transport fluid. Key issues associated with the system design include phase-change induced stresses in the shell, lithium hydride and shell compatibility, lithium hydride dissociation and hydrogen loss from the system, void presence and movement associated with the melt-freeze process, and heat transfer limitations on obtaining the desired energy storage density. 58 refs., 40 figs., 11 tabs.

Morris, D.G.; Foote, J.P.; Olszewski, M.

1987-12-01T23:59:59.000Z

239

Regional assessment of aquifers for thermal-energy storage. Volume 2. Regions 7 through 12  

SciTech Connect (OSTI)

This volume contains information on the geologic and hydrologic framework, major aquifers, aquifers which are suitable and unsuitable for annual thermal energy storage (ATES) and the ATES potential of the following regions of the US: Unglaciated Central Region; Glaciated Appalachians, Unglaciated Appalachians; Coastal Plain; Hawaii; and Alaska. (LCL)

Not Available

1981-06-01T23:59:59.000Z

240

Regional assessment of aquifers for thermal energy storage. Volume 1. Regions 1 through 6  

SciTech Connect (OSTI)

This volume contains information on the geologic and hydrologic framework, major aquifers, aquifers which are suitable and unsuitable for annual thermal energy storage (ATES) and the ATES potential of the following regions of the US: the Western Mountains; Alluvial Basins; Columbia LAVA Plateau; Colorado Plateau; High Plains; and Glaciated Central Region. (LCL)

Not Available

1981-06-01T23:59:59.000Z

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

External review of the thermal energy storage (TES) cogeneration study assumptions. Final report  

SciTech Connect (OSTI)

This report is to provide a detailed review of the basic assumptions made in the design, sizing, performance, and economic models used in the thermal energy storage (TES)/cogeneration feasibility studies conducted by Pacific Northwest Laboratory (PNL) staff. This report is the deliverable required under the contract.

Lai, B.Y.; Poirier, R.N. [Chicago Bridge and Iron Technical Services Co., Plainfield, IL (United States)

1996-08-01T23:59:59.000Z

242

Reducing Energy Costs And Minimizing Capital Requirements: Case Studies of Thermal Energy Storage (TES)  

E-Print Network [OSTI]

, and thus during those times when power has its highest cost or value. Thermal Energy Storage (TES) provides a means of de-coupling the generation of cooling from the provision of cooling to the peak cooling loads. In this manner, peak power demand...

Andrepont, J. S.

2007-01-01T23:59:59.000Z

243

Thermal Energy Storage/Waste Heat Recovery Applications in the Cement Industry  

E-Print Network [OSTI]

, and the Portland Cement Association have studied the potential benefits of using waste heat recovery methods and thermal energy storage systems in the cement manufacturing process. This work was performed under DOE Contract No. EC-77-C-01-50S4. The study has been...

Beshore, D. G.; Jaeger, F. A.; Gartner, E. M.

1979-01-01T23:59:59.000Z

244

Predictive control and thermal energy storage for optimizing a multi-energy district boiler  

E-Print Network [OSTI]

and used when demand is high, instead of engaging the gas-fuel oil boiler. Keywords: multi-energy district believe that by 2015 the supply of oil and natural gas will be unable to keep up with demand [1 of La Rochelle (France) adding to the plant a controlled thermal storage tank. This plant supplies

Paris-Sud XI, Université de

245

Conceptual Design of a 100 MWe Modular Molten Salt Power Tower Plant  

SciTech Connect (OSTI)

A conceptual design of a 100 MWe modular molten salt solar power tower plant has been developed which can provide capacity factors in the range of 35 to 75%. Compared to single tower plants, the modular design provides a higher degree of flexibility in achieving the desired customer's capacity factor and is obtained simply by adjusting the number of standard modules. Each module consists of a standard size heliostat field and receiver system, hence reengineering and associated unacceptable performance uncertainties due to scaling are eliminated. The modular approach with multiple towers also improves plant availability. Heliostat field components, receivers and towers are shop assembled allowing for high quality and minimal field assembly. A centralized thermal-storage system stores hot salt from the receivers, allowing nearly continuous power production, independent of solar energy collection, and improved parity with the grid. A molten salt steam generator converts the stored thermal energy into steam, which powers a steam turbine generator to produce electricity. This paper describes the conceptual design of the plant, the advantages of modularity, expected performance, pathways to cost reductions, and environmental impact.

James E. Pacheco; Carter Moursund, Dale Rogers, David Wasyluk

2011-09-20T23:59:59.000Z

246

Novel Molten Salts Thermal Energy Storage for Concentrating Solar Power Generation  

SciTech Connect (OSTI)

The explicit UA program objective is to develop low melting point (LMP) molten salt thermal energy storage media with high thermal energy storage density for sensible heat storage systems. The novel Low Melting Point (LMP) molten salts are targeted to have the following characteristics: 1. Lower melting point (MP) compared to current salts (<222ºC) 2. Higher energy density compared to current salts (>300 MJ/m3) 3. Lower power generation cost compared to current salt In terms of lower power costs, the program target the DOE's Solar Energy Technologies Program year 2020 goal to create systems that have the potential to reduce the cost of Thermal Energy Storage (TES) to less than $15/kWh-th and achieve round trip efficiencies greater than 93%. The project has completed the experimental investigations to determine the thermo-physical, long term thermal stability properties of the LMP molten salts and also corrosion studies of stainless steel in the candidate LMP molten salts. Heat transfer and fluid dynamics modeling have been conducted to identify heat transfer geometry and relative costs for TES systems that would utilize the primary LMP molten salt candidates. The project also proposes heat transfer geometry with relevant modifications to suit the usage of our molten salts as thermal energy storage and heat transfer fluids. The essential properties of the down-selected novel LMP molten salts to be considered for thermal storage in solar energy applications were experimentally determined, including melting point, heat capacity, thermal stability, density, viscosity, thermal conductivity, vapor pressure, and corrosion resistance of SS 316. The thermodynamic modeling was conducted to determine potential high temperature stable molten salt mixtures that have thermal stability up to 1000 °C. The thermo-physical properties of select potential high temperature stable (HMP) molten salt mixtures were also experimentally determined. All the salt mixtures align with the go/no-go goals stipulated by the DOE for this project. Energy densities of all salt mixtures were higher than that of the current solar salt. The salt mixtures costs have been estimated and TES system costs for a 2 tank, direct approach have been estimated for each of these materials. All estimated costs are significantly below the baseline system that used solar salt. These lower melt point salts offer significantly higher energy density per volume than solar salt – and therefore attractively smaller inventory and equipment costs. Moreover, a new TES system geometry has been recommended A variety of approaches were evaluated to use the low melting point molten salt. Two novel changes are recommended that 1) use the salt as a HTF through the solar trough field, and 2) use the salt to not only create steam but also to preheat the condensed feedwater for Rankine cycle. The two changes enable the powerblock to operate at 500°C, rather than the current 400°C obtainable using oil as the HTF. Secondly, the use of salt to preheat the feedwater eliminates the need to extract steam from the low pressure turbine for that purpose. Together, these changes result in a dramatic 63% reduction required for 6 hour salt inventory, a 72% reduction in storage volume, and a 24% reduction in steam flow rate in the power block. Round trip efficiency for the Case 5 - 2 tank “direct” system is estimated at >97%, with only small losses from time under storage and heat exchange, and meeting RFP goals. This attractive efficiency is available because the major heat loss experienced in a 2 tank “indirect” system - losses by transferring the thermal energy from oil HTF to the salt storage material and back to oil to run the steam generator at night - is not present for the 2 tank direct system. The higher heat capacity values for both LMP and HMP systems enable larger storage capacities for concentrating solar power.

Reddy, Ramana G. [The University of Alabama] [The University of Alabama

2013-10-23T23:59:59.000Z

247

THERMAL EVALUATION OF DRUM TYPE RADIOACTIVE MATERIAL PACKAGING ARRAYS IN STORAGE  

SciTech Connect (OSTI)

Drum type packages are routinely used to transport radioactive material (RAM) in the U.S. Department of Energy (DOE) complex. These packages are designed to meet the federal regulations described in 10 CFR 71.[1] In recent years, there has been a greater need to use these packagings to store the excess fissile material, especially plutonium for long term storage. While the design requirements for safe transportation of these packagings are well defined, the requirements for safe long term storage are not well established. Since the RAM contents in the packagings produce decay heat, it is important that they are stored carefully to prevent overheating of the containment vessel (CV) seals to prevent any leakage and the impact limiter to maintain the package structural integrity. This paper analyzes different storage arrays for a typical 9977 packaging for thermal considerations and makes recommendations for their safe storage under normal operating conditions.

Gupta, N

2009-04-27T23:59:59.000Z

248

Parametric studies and optimisation of pumped thermal electricity storage  

E-Print Network [OSTI]

(T2 and T4) are fixed, 38 instead of fixing T1 and T3, then variation of the pressure ratio gives trends similar to those observed for gas 39 turbine cycles for which there are optimum pressure ratios, as shown in Fig. 4(b). The optimum pressure 40... t , where 28 Dh is the cylinder mean hydraulic diameter and ?t is the mean thermal diffusivity of the gas. Based on the 29 dimensions and conditions listed in Tables 2 and 3, the Peclet number for the hot cylinder is 34 000, 30 suggesting an efficiency loss...

McTigue, Joshua; White, Alexander; Markides, Christos N.

2014-09-11T23:59:59.000Z

249

Sandia National Laboratories: metal hydride storage thermal-management  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbine bladelifetime is the cumulativeissues thermal-management

250

Predictive Optimal Control of Active and Passive Building Thermal Storage Inventory  

SciTech Connect (OSTI)

Cooling of commercial buildings contributes significantly to the peak demand placed on an electrical utility grid. Time-of-use electricity rates encourage shifting of electrical loads to off-peak periods at night and weekends. Buildings can respond to these pricing signals by shifting cooling-related thermal loads either by precooling the building's massive structure or the use of active thermal energy storage systems such as ice storage. While these two thermal batteries have been engaged separately in the past, this project investigates the merits of harnessing both storage media concurrently in the context of predictive optimal control. This topical report describes the demonstration of the model-based predictive optimal control for active and passive building thermal storage inventory in a test facility in real-time using time-of-use differentiated electricity prices without demand charges. The laboratory testing findings presented in this topical report cover the second of three project phases. The novel supervisory controller successfully executed a three-step procedure consisting of (1) short-term weather prediction, (2) optimization of control strategy over the next planning horizon using a calibrated building model, and (3) post-processing of the optimal strategy to yield a control command for the current time step that can be executed in the test facility. The primary and secondary building mechanical systems were effectively orchestrated by the model-based predictive optimal controller in real-time while observing comfort and operational constraints. The findings reveal that when the optimal controller is given imperfect weather fore-casts and when the building model used for planning control strategies does not match the actual building perfectly, measured utility costs savings relative to conventional building operation can be substantial. This requires that the facility under control lends itself to passive storage utilization and the building model includes a realistic plant model. The savings associated with passive building thermal storage inventory proved to be small be-cause the test facility is not an ideal candidate for the investigated control technology. Moreover, the facility's central plant revealed the idiosyncratic behavior that the chiller operation in the ice-making mode was more energy efficient than in the chilled-water mode. Field experimentation (Phase III) is now required in a suitable commercial building with sufficient thermal mass, an active TES system, and a climate conducive to passive storage utilization over a longer testing period to support the laboratory findings presented in this topical report.

Gregor P. Henze; Moncef Krarti

2003-12-17T23:59:59.000Z

251

Tomorrow`s energy today for cities and counties - keep it cool with thermal energy storage  

SciTech Connect (OSTI)

Cool thermal energy storage (TES) is described as a means for electric utilities to provide electricity from off-peak times, particularly in the summer when air-conditioning accounts for 50% or more of electricity consumption. Cool TES uses off-peak power to provide cooling capacity by extracting heat from a storage medium such as ice or other phase change material. A refrigeration system may may be utilized at night to provide a reservoir of cold material. During the day, the reservoir is tapped to provide cooling capacity. The advantages of TES are discussed.

NONE

1995-07-01T23:59:59.000Z

252

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

SciTech Connect (OSTI)

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, including the specific heat, thermal conductivity, latent heat, and melting point. We also assessed the stability of the composite material with repeated thermal cycling and the effects of adding the nanoparticles on the corrosion of stainless steel by the composite salt. Our results indicate that stable, repeatable 25-50% improvements in specific heat are possible for these materials. We found that using these composite salts as the thermal energy storage material for a concentrating solar thermal power system can reduce the levelized cost of electricity by 10-20%. We conclude that these materials are worth further development and inclusion in future concentrating solar power systems.

Michael Schuller; Frank Little; Darren Malik; Matt Betts; Qian Shao; Jun Luo; Wan Zhong; Sandhya Shankar; Ashwin Padmanaban

2012-03-30T23:59:59.000Z

253

Evaluation of olivine ceramic refractories for thermal-energy-storage application  

SciTech Connect (OSTI)

High-heat capacity refractory ceramics have been employed in European electric heat storage furnaces for over two decades. In these systems, ceramic refractories are heated to approximately 1500/sup 0/F, using low-cost electric energy during the off-peak demand hours. During the peak demand hours, heat is extracted as needed by controlled circulation of air through the core to meet space conditioning requirements. Heat storage or thermal energy storage (TES) furnaces represent (a) valuable load-leveling capabilities for electric utilities and (b) safe, convenient, reliable heat sources for consumers. Because of its relatively high-heat capacity and relatively low cost, olivine is one of the more attractive candidate materials for such ceramics. This paper includes a discussion of the goals of the current study, along with results achieved to date. Further, here is a discussion of future work to be undertaken as a part of this study.

Palmour, H. III; Gay, B.M.; Cochran, R.L.

1981-01-01T23:59:59.000Z

254

Hybrid Vapor Compression Adsorption System: Thermal Storage Using Hybrid Vapor Compression Adsorption System  

SciTech Connect (OSTI)

HEATS Project: UTRC is developing a new climate-control system for EVs that uses a hybrid vapor compression adsorption system with thermal energy storage. The targeted, closed system will use energy during the battery-charging step to recharge the thermal storage, and it will use minimal power to provide cooling or heating to the cabin during a drive cycle. The team will use a unique approach of absorbing a refrigerant on a metal salt, which will create a lightweight, high-energy-density refrigerant. This unique working pair can operate indefinitely as a traditional vapor compression heat pump using electrical energy, if desired. The project will deliver a hot-and-cold battery that provides comfort to the passengers using minimal power, substantially extending the driving range of EVs.

None

2012-01-04T23:59:59.000Z

255

Environmental assessment of the potential effects of aquifer thermal energy storage systems on microorganisms in groundwater  

SciTech Connect (OSTI)

The primary objective of this study was to evaluate the potential environmental effects (both adverse and beneficials) of aquifer thermal energy storage (ATES) technology pertaining to microbial communities indigenous to subsurface environments (i.e., aquifers) and the propagation, movement, and potential release of pathogenic microorganisms (specifically, Legionella) within ATES systems. Seasonal storage of thermal energy in aquifers shows great promise to reduce peak demand; reduce electric utility load problems; contribute to establishing favorable economics for district heating and cooling systems; and reduce pollution from extraction, refining, and combustion of fossil fuels. However, concerns that the widespread implementation of this technology may have adverse effects on biological systems indigeneous to aquifers, as well as help to propagate and release pathogenic organisms that enter thee environments need to be resolved. 101 refs., 2 tabs.

Hicks, R.J.; Stewart, D.L.

1988-03-01T23:59:59.000Z

256

Predictive Optimal Control of Active and Passive Building Thermal Storage Inventory  

SciTech Connect (OSTI)

Cooling of commercial buildings contributes significantly to the peak demand placed on an electrical utility grid. Time-of-use electricity rates encourage shifting of electrical loads to off-peak periods at night and weekends. Buildings can respond to these pricing signals by shifting cooling-related thermal loads either by precooling the building's massive structure or the use of active thermal energy storage systems such as ice storage. While these two thermal batteries have been engaged separately in the past, this project investigated the merits of harnessing both storage media concurrently in the context of predictive optimal control. To pursue the analysis, modeling, and simulation research of Phase 1, two separate simulation environments were developed. Based on the new dynamic building simulation program EnergyPlus, a utility rate module, two thermal energy storage models were added. Also, a sequential optimization approach to the cost minimization problem using direct search, gradient-based, and dynamic programming methods was incorporated. The objective function was the total utility bill including the cost of reheat and a time-of-use electricity rate either with or without demand charges. An alternative simulation environment based on TRNSYS and Matlab was developed to allow for comparison and cross-validation with EnergyPlus. The initial evaluation of the theoretical potential of the combined optimal control assumed perfect weather prediction and match between the building model and the actual building counterpart. The analysis showed that the combined utilization leads to cost savings that is significantly greater than either storage but less than the sum of the individual savings. The findings reveal that the cooling-related on-peak electrical demand of commercial buildings can be considerably reduced. A subsequent analysis of the impact of forecasting uncertainty in the required short-term weather forecasts determined that it takes only very simple short-term prediction models to realize almost all of the theoretical potential of this control strategy. Further work evaluated the impact of modeling accuracy on the model-based closed-loop predictive optimal controller to minimize utility cost. The following guidelines have been derived: For an internal heat gain dominated commercial building, reasonable geometry simplifications are acceptable without a loss of cost savings potential. In fact, zoning simplification may improve optimizer performance and save computation time. The mass of the internal structure did not show a strong effect on the optimization. Building construction characteristics were found to impact building passive thermal storage capacity. It is thus advisable to make sure the construction material is well modeled. Zone temperature setpoint profiles and TES performance are strongly affected by mismatches in internal heat gains, especially when they are underestimated. Since they are a key factor in determining the building cooling load, efforts should be made to keep the internal gain mismatch as small as possible. Efficiencies of the building energy systems affect both zone temperature setpoints and active TES operation because of the coupling of the base chiller for building precooling and the icemaking TES chiller. Relative efficiencies of the base and TES chillers will determine the balance of operation of the two chillers. The impact of mismatch in this category may be significant. Next, a parametric analysis was conducted to assess the effects of building mass, utility rate, building location and season, thermal comfort, central plant capacities, and an economizer on the cost saving performance of optimal control for active and passive building thermal storage inventory. The key findings are: (1) Heavy-mass buildings, strong-incentive time-of-use electrical utility rates, and large on-peak cooling loads will likely lead to attractive savings resulting from optimal combined thermal storage control. (2) By using economizer to take advantage of the cool fresh air during the night, the bu

Gregor P. Henze; Moncef Krarti

2005-09-30T23:59:59.000Z

257

PRELIMINARY REPORT: EFFECTS OF IRRADIATION AND THERMAL EXPOSURE ON ELASTOMERIC SEALS FOR CASK TRANSPORTATION AND STORAGE  

SciTech Connect (OSTI)

A testing and analysis approach to predict the sealing behavior of elastomeric seal materials in dry storage casks and evaluate their ability to maintain a seal under thermal and radiation exposure conditions of extended storage and beyond was developed, and initial tests have been conducted. The initial tests evaluate the aging response of EPDM elastomer O-ring seals. The thermal and radiation exposure conditions of the CASTOR® V/21 casks were selected for testing as this cask design is of interest due to its widespread use, and close proximity of the seals to the fuel compared to other cask designs leading to a relatively high temperature and dose under storage conditions. A novel test fixture was developed to enable compression stress relaxation measurements for the seal material at the thermal and radiation exposure conditions. A loss of compression stress of 90% is suggested as the threshold at which sealing ability of an elastomeric seal would be lost. Previous studies have shown this value to be conservative to actual leakage failure for most aging conditions. These initial results indicate that the seal would be expected to retain sealing ability throughout extended storage at the cask design conditions, though longer exposure times are needed to validate this assumption. The high constant dose rate used in the testing is not prototypic of the decreasingly low dose rate that would occur under extended storage. The primary degradation mechanism of oxidation of polymeric compounds is highly dependent on temperature and time of exposure, and with radiation expected to exacerbate the oxidation.

Verst, C.; Skidmore, E.; Daugherty, W.

2014-05-30T23:59:59.000Z

258

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

259

Technology Potential of Thermal Energy Storage (TES) Systems in Federal Facilities  

SciTech Connect (OSTI)

This document presents the findings of a technology market assessment for thermal energy storage (TES) in space cooling applications. The potential impact of TES in Federal facilities is modeled using the Federal building inventory with the appropriate climatic and energy cost data. In addition, this assessment identified acceptance issues and major obstacles through interviews with energy services companies (ESCOs), TES manufacturers, and Federal facility staff.

Chvala, William D.

2001-07-31T23:59:59.000Z

260

Thermal performance sensitivity studies in support of material modeling for extended storage of used nuclear fuel  

SciTech Connect (OSTI)

The work reported here is an investigation of the sensitivity of component temperatures of a storage system, including fuel cladding temperatures, in response to age-related changes that could degrade the design-basis thermal behavior of the system. Three specific areas of interest were identified for this study. • degradation of the canister backfill gas from pure helium to a mixture of air and helium, resulting from postulated leakage due to stress corrosion cracking (SCC) of canister welds • changes in surface emissivity of system components, resulting from corrosion or other aging mechanisms, which could cause potentially significant changes in temperatures and temperature distributions, due to the effect on thermal radiation exchange between components • changes in fuel and basket temperatures due to changes in fuel assembly position within the basket cells in the canister The purpose of these sensitivity studies is to provide a realistic example of how changes in the physical properties or configuration of the storage system components can affect temperatures and temperature distributions. The magnitudes of these sensitivities can provide guidance for identifying appropriate modeling assumptions for thermal evaluations extending long term storage out beyond 50, 100, 200, and 300 years.

Cuta, Judith M.; Suffield, Sarah R.; Fort, James A.; Adkins, Harold E.

2013-08-15T23:59:59.000Z

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

Wind tower service lift  

DOE Patents [OSTI]

An apparatus used for maintaining a wind tower structure wherein the wind tower structure may have a plurality of legs and may be configured to support a wind turbine above the ground in a better position to interface with winds. The lift structure may be configured for carrying objects and have a guide system and drive system for mechanically communicating with a primary cable, rail or other first elongate member attached to the wind tower structure. The drive system and guide system may transmit forces that move the lift relative to the cable and thereby relative to the wind tower structure. A control interface may be included for controlling the amount and direction of the power into the guide system and drive system thereby causing the guide system and drive system to move the lift relative to said first elongate member such that said lift moves relative to said wind tower structure.

Oliphant, David; Quilter, Jared; Andersen, Todd; Conroy, Thomas

2011-09-13T23:59:59.000Z

262

Current and Future Costs for Parabolic Trough and Power Tower Systems in the US Market: Preprint  

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, C.; Mehos, M.; Ho, C. K.; Kolb, G. J.

2010-10-01T23:59:59.000Z

263

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

264

Dynamic modeling and control strategies for a micro-CSP plant with thermal storage powered by the Organic Rankine cycle  

E-Print Network [OSTI]

Organic Rankine cycle (ORC) systems are gaining ground as a means of effectively providing sustainable energy. Coupling small-scale ORCs powered by scroll expander- generators with solar thermal collectors and storage can ...

Ireland, Melissa Kara

2014-01-01T23:59:59.000Z

265

Demand-Side and Supply-Side Load Management: Optimizing with Thermal Energy Storage (TES) for the Restructuring Energy Marketplace  

E-Print Network [OSTI]

-side regarding power generation. Thermal Energy Storage (TES) can provide the flexibility essential to the economical management of power. In large industrial applications, the added value of TES has been demonstrated, not only in managing operating costs...

Andrepont, J. S.

266

Reducing the Cost of Thermal Energy Storage for Parabolic Trough Solar Power Plants  

SciTech Connect (OSTI)

Thermal energy storage systems using phase change materials were evaluated for trough systems that use oil, steam, and high temperature salts as heat transfer fluids. A variety of eutectic salts and metal alloys were considered as phase change materials in a cascaded arrangement. Literature values of specific heat, latent heat, density, and other thermophysical properties were used in initial analyses. Testing laboratories were contracted to measure properties for candidate materials for comparison to the literature and for updating the models. A TRNSYS model from Phase 1 was further developed for optimizing the system, including a novel control algorithm. A concept for increasing the bulk thermal conductivity of the phase change system was developed using expanded metal sheets. Outside companies were contracted to design and cost systems using platecoil heat exchangers immersed in the phase change material. Laboratory evaluations of the one-dimensional and three-dimensional behavior of expanded metal sheets in a low conductivity medium were used to optimize the amount of thermal conductivity enhancement. The thermal energy storage systems were compared to baseline conventional systems. The best phase change system found in this project, which was for the high temperature plant, had a projected cost of $25.2 per kWhth, The best system also had a cost that was similar to the base case, a direct two-tank molten salt system.

Gawlik, Keith

2013-06-25T23:59:59.000Z

267

Evaluation of diurnal thermal energy storage combined with cogeneration systems. Phase 2  

SciTech Connect (OSTI)

This report describes the results of a study of thermal energy storage (TES) systems integrated with combined-cycle gas turbine cogeneration systems. Integrating thermal energy storage with conventional cogeneration equipment increases the initial cost of the combined system; but, by decoupling electric power and process heat production, the system offers two significant advantages. First, electric power can be generated on demand, irrespective of the process heat load profile, thus increasing the value of the power produced. Second, although supplementary firing could be used to serve independently varying electric and process heat loads, this approach is inefficient. Integrating TES with cogeneration can serve the two independent loads while firing all fuel in the gas turbine. An earlier study analyzed TES integrated with a simple-cycle cogeneration system. This follow-on study evaluated the cost of power produced by a combined-cycle electric power plant (CC), a combined-cycle cogeneration plant (CC/Cogen), and a combined-cycle cogeneration plant integrated with thermal energy storage (CC/TES/Cogen). Each of these three systems was designed to serve a fixed (24 hr/day) process steam load. The value of producing electricity was set at the levelized cost for a CC plant, while the value of the process steam was for a conventional stand-alone boiler. The results presented here compared the costs for CC/TES/Cogen system with those of the CC and the CC/Cogen plants. They indicate relatively poor economic prospects for integrating TES with a combined-cycle cogeneration power plant for the assumed designs. The major reason is the extremely close approach temperatures at the storage media heaters, which makes the heaters large and therefore expensive.

Somasundaram, S.; Brown, D.R.; Drost, M.K.

1993-07-01T23:59:59.000Z

268

Solar Updraft TowersSolar Updraft Towers Presentation 5  

E-Print Network [OSTI]

Solar Updraft TowersSolar Updraft Towers CEE 491 Presentation 5 Travis Satsuma May 5, 2009 #12 Benefits Solar tower built in the desert, instigates plant growth Condensation created at night enlivens turbines running 24/7 CO2 only produced during construction of tower #12;HistoryHistory In 1903, Catalan

Prevedouros, Panos D.

269

Radiometric Modeling of Mechanical Draft Cooling Towers to Assist in the Extraction of their Absolute Temperature  

E-Print Network [OSTI]

of Mechanical Draft Cooling Towers to Assist in the Extraction of their Absolute Temperature from Remote Thermal Abstract Determination of the internal temperature of a mechanical draft cooling tower (MDCT) from remotelyRadiometric Modeling of Mechanical Draft Cooling Towers to Assist in the Extraction

Salvaggio, Carl

270

Molten Salt Power Tower Cost Model for the System Advisor Model (SAM)  

SciTech Connect (OSTI)

This report describes a component-based cost model developed for molten-salt power tower solar power plants. The cost model was developed by the National Renewable Energy Laboratory (NREL), using data from several prior studies, including a contracted analysis from WorleyParsons Group, which is included herein as an Appendix. The WorleyParsons' analysis also estimated material composition and mass for the plant to facilitate a life cycle analysis of the molten salt power tower technology. Details of the life cycle assessment have been published elsewhere. The cost model provides a reference plant that interfaces with NREL's System Advisor Model or SAM. The reference plant assumes a nominal 100-MWe (net) power tower running with a nitrate salt heat transfer fluid (HTF). Thermal energy storage is provided by direct storage of the HTF in a two-tank system. The design assumes dry-cooling. The model includes a spreadsheet that interfaces with SAM via the Excel Exchange option in SAM. The spreadsheet allows users to estimate the costs of different-size plants and to take into account changes in commodity prices. This report and the accompanying Excel spreadsheet can be downloaded at https://sam.nrel.gov/cost.

Turchi, C. S.; Heath, G. A.

2013-02-01T23:59:59.000Z

271

The effects of storage time, storage temperature, and concentration on percent recoveries of thermally desorbed diffusive dosimeter samples contaminated with chloroform  

E-Print Network [OSTI]

, the Analabs Thermal Desorber. 4. The Programmed Thermal Desorber on the left and linear chart recorder on the far right. 5. Gas Chromatograph Peak, Integrator Counting, and GC Conditions for Chloroform. 10 17 19 21 24 6. Photograph Illustrating.... A 2 x 3 x 3 Factorial Treatment Design . 13. Analysis of Variance Table for the Experimental Data 14. Mean Percent Recovery vs. Storage Temperature for 7 Days and 14 Days Storage Time At Concentration I (5 ppm - 8 hours). 26 27 28 29 30 31...

Gallucci, Joseph Matthew

2012-06-07T23:59:59.000Z

272

High Energy Density Thermal Batteries: Thermoelectric Reactors for Efficient Automotive Thermal Storage  

SciTech Connect (OSTI)

HEATS Project: Sheetak is developing a new HVAC system to store the energy required for heating and cooling in EVs. This system will replace the traditional refrigerant-based vapor compressors and inefficient heaters used in today’s EVs with efficient, light, and rechargeable hot-and-cold thermal batteries. The high energy density thermal battery—which does not use any hazardous substances—can be recharged by an integrated solid-state thermoelectric energy converter while the vehicle is parked and its electrical battery is being charged. Sheetak’s converters can also run on the electric battery if needed and provide the required cooling and heating to the passengers—eliminating the space constraint and reducing the weight of EVs that use more traditional compressors and heaters.

None

2011-11-15T23:59:59.000Z

273

Development and Performance Evaluation of High Temperature Concrete for Thermal Energy Storage for Solar Power Generation  

SciTech Connect (OSTI)

Thermal energy can be stored by the mechanism of sensible or latent heat or heat from chemical reactions. Sensible heat is the means of storing energy by increasing the temperature of the solid or liquid. Since the concrete as media cost per kWhthermal is $1, this seems to be a very economical material to be used as a TES. This research is focused on extending the concrete TES system for higher temperatures (500 �ºC to 600 �ºC) and increasing the heat transfer performance using novel construction techniques. To store heat at high temperature special concretes are developed and tested for its performance. The storage capacity costs of the developed concrete is in the range of $0.91-$3.02/kWhthermal Two different storage methods are investigated. In the first one heat is transported using molten slat through a stainless steel tube and heat is transported into concrete block through diffusion. The cost of the system is higher than the targeted DOE goal of $15/kWhthermal The increase in cost of the system is due to stainless steel tube to transfer the heat from molten salt to the concrete blocks.The other method is a one-tank thermocline system in which both the hot and cold fluid occupy the same tank resulting in reduced storage tank volume. In this model, heated molten salt enters the top of the tank which contains a packed bed of quartzite rock and silica sand as the thermal energy storage (TES) medium. The single-tank storage system uses about half the salt that is required by the two-tank system for a required storage capacity. This amounts to a significant reduction in the cost of the storage system. The single tank alternative has also been proven to be cheaper than the option which uses large concrete modules with embedded heat exchangers. Using computer models optimum dimensions are determined to have an round trip efficiency of 84%. Additionally, the cost of the structured concrete thermocline configuration provides the TES capacity cost of $33.80$/kWhthermal compared with $30.04/kWhthermal for a packed-bed thermocline (PBTC) configuration and $46.11/kWhthermal for a two-tank liquid configuration.

R. Panneer Selvam, Micah Hale and Matt strasser

2013-03-31T23:59:59.000Z

274

Accepted for publication in Energy and Buildings. 2014. http://dx.doi.org/10.1016/j.enbuild.2014.03.056 Improvement of Borehole Thermal Energy Storage Design Based on  

E-Print Network [OSTI]

.03.056 1 Improvement of Borehole Thermal Energy Storage Design Based on Experimental and Modelling Results Thermal Energy Storage appears to be an attractive solution for solar thermal energy storage. The SOLARGEOTHERM research project aimed to evaluate the energetic potential of borehole thermal energy storage

Paris-Sud XI, Université de

275

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

276

Optimizing energy storage and reproduction for Aquifer Thermal Energy Storage. A scientific approach in enhancing ATES system performance at Achmea Apeldoorn through application of smart extraction and infiltration strategies.  

E-Print Network [OSTI]

??In the subsurface beneath the campus of Apeldoorn Achmea, the groundwater flow velocity is high. This causes a problem for its Aquifer Thermal Energy Storage… (more)

Groot, J.H.

2014-01-01T23:59:59.000Z

277

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

278

System for thermal energy storage, space heating and cooling and power conversion  

DOE Patents [OSTI]

An integrated system for storing thermal energy, for space heating and cong and for power conversion is described which utilizes the reversible thermal decomposition characteristics of two hydrides having different decomposition pressures at the same temperature for energy storage and space conditioning and the expansion of high-pressure hydrogen for power conversion. The system consists of a plurality of reaction vessels, at least one containing each of the different hydrides, three loops of circulating heat transfer fluid which can be selectively coupled to the vessels for supplying the heat of decomposition from any appropriate source of thermal energy from the outside ambient environment or from the spaces to be cooled and for removing the heat of reaction to the outside ambient environment or to the spaces to be heated, and a hydrogen loop for directing the flow of hydrogen gas between the vessels. When used for power conversion, at least two vessels contain the same hydride and the hydrogen loop contains an expansion engine. The system is particularly suitable for the utilization of thermal energy supplied by solar collectors and concentrators, but may be used with any source of heat, including a source of low-grade heat.

Gruen, Dieter M. (Downers Grove, IL); Fields, Paul R. (Chicago, IL)

1981-04-21T23:59:59.000Z

279

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

280

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

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

High-Temperature Phase Change Materials (PCM) Candidates for Thermal Energy Storage (TES) Applications  

SciTech Connect (OSTI)

It is clearly understood that lower overall costs are a key factor to make renewable energy technologies competitive with traditional energy sources. Energy storage technology is one path to increase the value and reduce the cost of all renewable energy supplies. Concentrating solar power (CSP) technologies have the ability to dispatch electrical output to match peak demand periods by employing thermal energy storage (TES). Energy storage technologies require efficient materials with high energy density. Latent heat TES systems using phase change material (PCM) are useful because of their ability to charge and discharge a large amount of heat from a small mass at constant temperature during a phase transformation like melting-solidification. PCM technology relies on the energy absorption/liberation of the latent heat during a physical transformation. The main objective of this report is to provide an assessment of molten salts and metallic alloys proposed as candidate PCMs for TES applications, particularly in solar parabolic trough electrical power plants at a temperature range from 300..deg..C to 500..deg.. C. The physical properties most relevant for PCMs service were reviewed from the candidate selection list. Some of the PCM candidates were characterized for: chemical stability with some container materials; phase change transformation temperatures; and latent heats.

Gomez, J. C.

2011-09-01T23:59:59.000Z

282

Computational simulations of latent heat thermal energy storage systems - with innovative and first-principles based simulation for the underlying unsteady melting (and solidification) processes.  

E-Print Network [OSTI]

?? This thesis develops an effective modeling and simulation procedure for a specific thermal energy storage system commonly used and recommended for various applications (such… (more)

Gumaste, Rohan Achyut

2011-01-01T23:59:59.000Z

283

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

284

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.

285

Temperature-dependent mechanical property testing of nitrate thermal storage salts.  

SciTech Connect (OSTI)

Three salt compositions for potential use in trough-based solar collectors were tested to determine their mechanical properties as a function of temperature. The mechanical properties determined were unconfined compressive strength, Young's modulus, Poisson's ratio, and indirect tensile strength. Seventeen uniaxial compression and indirect tension tests were completed. It was found that as test temperature increases, unconfined compressive strength and Young's modulus decreased for all salt types. Empirical relationships were developed quantifying the aforementioned behaviors. Poisson's ratio tends to increase with increasing temperature except for one salt type where there is no obvious trend. The variability in measured indirect tensile strength is large, but not atypical for this index test. The average tensile strength for all salt types tested is substantially higher than the upper range of tensile strengths for naturally occurring rock salts. Interest in raising the operating temperature of concentrating solar technologies and the incorporation of thermal storage has motivated studies on the implementation of molten salt as the system working fluid. Recently, salt has been considered for use in trough-based solar collectors and has been shown to offer a reduction in levelized cost of energy as well as increasing availability (Kearney et al., 2003). Concerns regarding the use of molten salt are often related to issues with salt solidification and recovery from freeze events. Differences among salts used for convective heat transfer and storage are typically designated by a comparison of thermal properties. However, the potential for a freeze event necessitates an understanding of salt mechanical properties in order to characterize and mitigate possible detrimental effects. This includes stress imparted by the expanding salt. Samples of solar salt, HITEC salt (Coastal Chemical Co.), and a low melting point quaternary salt were cast for characterization tests to determine unconfined compressive strength, indirect tensile strength, coefficient of thermal expansion (CTE), Young's modulus, and Poisson's ratio. Experiments were conducted at multiple temperatures below the melting point to determine temperature dependence.

Everett, Randy L.; Iverson, Brian D.; Broome, Scott Thomas; Siegel, Nathan Phillip; Bronowski, David R.

2010-09-01T23:59:59.000Z

286

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

287

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

288

Cooling Towers, The Debottleneckers  

E-Print Network [OSTI]

Power generating plants and petro-chemical works are always expanding. An on-going problem is to identify and de-bottle neck restricting conditions of growth. The cooling tower is a highly visible piece of equipment. Most industrial crossflow units...

Burger, R.

289

Analyzing the Effects of Climate and Thermal Configuration on Community Energy Storage Systems (Presentation)  

SciTech Connect (OSTI)

Community energy storage (CES) has been proposed to mitigate the high variation in output from renewable sources and reduce peak load on the electrical grid. Thousands of these systems may be distributed around the grid to provide benefits to local distribution circuits and to the grid as a whole when aggregated. CES must be low cost to purchase and install and also largely maintenance free through more than 10 years of service life to be acceptable to most utilities.Achieving the required system life time is a major uncertainty for lithium-ion batteries. The lifetime and immediate system performance of batteries can change drastically with battery temperature, which is a strong function of system packaging, local climate, electrical duty cycle, and other factors. In other Li-ion applications, this problem is solved via air or liquid heating and cooling systems that may need occasional maintenance throughout their service life. CES requires a maintenance-free thermal management system providing protection from environmental conditions while rejecting heat from a moderate electrical duty cycle. Thus, the development of an effective, low-cost, zero-maintenance thermal management system poses a challenge critical to the success of CES. NREL and Southern California Edison have collaborated to evaluate the long-term effectiveness of various CES thermal configurations in multiple climates by building a model of CES based on collected test data, integrating it with an NREL-developed Li-ion degradation model, and applying CES electrical duty cycles and historic location-specific meteorological data to forecast battery thermal response and degradation through a 10-year service life.

Neubauer, J.; Pesaran, A.; Coleman, D.; Chen, D.

2013-10-01T23:59:59.000Z

290

Evaluation Framework and Analyses for Thermal Energy Storage Integrated with Packaged Air Conditioning  

SciTech Connect (OSTI)

Few third-party guidance documents or tools are available for evaluating thermal energy storage (TES) integrated with packaged air conditioning (AC), as this type of TES is relatively new compared to TES integrated with chillers or hot water systems. To address this gap, researchers at the National Renewable Energy Laboratory conducted a project to improve the ability of potential technology adopters to evaluate TES technologies. Major project outcomes included: development of an evaluation framework to describe key metrics, methodologies, and issues to consider when assessing the performance of TES systems integrated with packaged AC; application of multiple concepts from the evaluation framework to analyze performance data from four demonstration sites; and production of a new simulation capability that enables modeling of TES integrated with packaged AC in EnergyPlus. This report includes the evaluation framework and analysis results from the project.

Kung, F.; Deru, M.; Bonnema, E.

2013-10-01T23:59:59.000Z

291

Innovative Phase Change Thermal Energy Storage Solution for Baseload Power Phase 1 Final Report  

SciTech Connect (OSTI)

The primary purpose of this project is to develop and validate an innovative, scalable phase change salt thermal energy storage (TES) system that can interface with Infinia’s family of free-piston Stirling engines (FPSE). This TES technology is also appropriate for Rankine and Brayton power converters. Solar TES systems based on latent heat of fusion rather than molten salt temperature differences, have many advantages that include up to an order of magnitude higher energy storage density, much higher temperature operation, and elimination of pumped loops for most of Infinia’s design options. DOE has funded four different concepts for solar phase change TES, including one other Infinia awarded project using heat pipes to transfer heat to and from the salt. The unique innovation in this project is an integrated TES/pool boiler heat transfer system that is the simplest approach identified to date and arguably has the best potential for minimizing the levelized cost of energy (LCOE). The Phase 1 objectives are to design, build and test a 1-hour TES proof-of-concept lab demonstrator integrated with an Infinia 3 kW Stirling engine, and to conduct a preliminary design of a 12-hour TES on-sun prototype.

Qiu, Songgang

2013-05-15T23:59:59.000Z

292

Enabling Greater Penetration of Solar Power via the Use of CSP with Thermal Energy Storage  

SciTech Connect (OSTI)

At high penetration of solar generation there are a number of challenges to economically integrating this variable and uncertain resource. These include the limited coincidence between the solar resource and normal demand patterns and limited flexibility of conventional generators to accommodate variable generation resources. Of the large number of technologies that can be used to enable greater penetration of variable generators, concentrating solar power (CSP) with thermal energy storage (TES) presents a number of advantages. The use of storage enables this technology to shift energy production to periods of high demand or reduced solar output. In addition, CSP can provide substantial grid flexibility by rapidly changing output in response to the highly variable net load created by high penetration of solar (and wind) generation. In this work we examine the degree to which CSP may be complementary to PV by performing a set of simulations in the U.S. Southwest to demonstrate the general potential of CSP with TES to enable greater use of solar generation, including additional PV.

Denholm, P.; Mehos, M.

2011-11-01T23:59:59.000Z

293

Variable Frequency AC Drives for Cooling Tower Energy Efficiency  

E-Print Network [OSTI]

speed fan drives. Fan speed is reduced to yield specific water temperatures at thermal conditions less difficult than design. The reduced air flow is accomplished by reduced fan power consumption, resulting in optimum cooling tower operation... and economics. Automatic fan speed control by sensing cold water temperature is the economic essence of the application of adjustable frequency power to A-C fan motors. 2.2 Cell Partitions In some multi-cell mechanical-draft cooling towers, the isolation...

Corey, R. W.

1982-01-01T23:59:59.000Z

294

Estimation of Biomass Heat Storage Using Thermal Infrared Imagery: Application to a Walnut Orchard  

E-Print Network [OSTI]

NOTE Estimation of Biomass Heat Storage Using Thermalmethod to estimate tree biomass heat storage from thermalinfrared (TIR) imaging of biomass surface temperature is

Garai, Anirban; Kleissl, Jan; Llewellyn Smith, Stefan G.

2010-01-01T23:59:59.000Z

295

Department of Mechanical Engineering Spring 2013 Improving the Efficiency of a Non-Pressurized Thermal Storage Tank  

E-Print Network [OSTI]

-Pressurized Thermal Storage Tank Overview Hydroflex had provided the team with a tank and the heat exchanger coil that was to be used to heat the tank. While attempting to improve the tank's efficiency, the team was required to keep certain parameters of the tank the same, such as it insulation and the type of coil that was used

Demirel, Melik C.

296

Distributed Energy Resources On-Site Optimization for Commercial Buildings with Electric and Thermal Storage Technologies  

E-Print Network [OSTI]

photovoltaics and solar thermal collectors; electricalfor application of solar thermal and recovered heat to end-absorption chiller solar thermal photovoltaics Results

Stadler, Michael

2008-01-01T23:59:59.000Z

297

COBRA-SFS (Spent-Fuel Storage) thermal-hydraulic analyses of the CASTOR-1C and REA 2023 BWR storage casks containing consolidated spent fuel  

SciTech Connect (OSTI)

Consolidation of spent nuclear fuel rods is being considered as one option for more efficient and compact storage of reactor spent fuel assemblies. In this concept, rods from two disassembled spent fuel assemblies will be consolidated in a space originally intended to store a single unconsolidated assembly. The thermal performance of consolidated fuel rods in dry storage, especially in multiassembly storage systems, is one of the major issues that must be addressed prior to implementation. In this study, Pacific Northwest Laboratory researchers performed thermal-hydraulic analyses for both the REA 2023 cask and the CASTOR-1C cask containing either unconsolidated or consolidated BWR spent fuel assemblies. The objective was to determine the effect of consolidating spent fuel assemblies on the temperature distributions within both types of casks. Two major conclusions resulted from this study. First, a lumping technique (combining rods and flow channels), which reduces the number of computational nodes required to model complex multiassembly geometries, could be used for both unconsolidated and consolidated rods with negligible effect on prediction accuracies. Second, with a relatively high thermal conductivity backfill gas (e.g., helium), the predicted peak fuel rod temperature in a canister of consolidated rods generating the same amount of heat as an unconsolidated assembly is essentially the same as the peak temperature in the unconsolidated assembly. In contrast, with a relatively low thermal conductivity backfill gas (e.g., nitrogen), the opposite is true and the predicted peak temperature in a consolidated canister is significantly higher than in an unconsolidated assembly. Therefore, when rods are consolidated, selection of the backfill gas is important in maintaining peak rod temperatures below allowable values for rods with relatively high decay heat generation rates.

Rector, D.R.; Cuta, J.M.; Lombardo, N.J.

1986-12-01T23:59:59.000Z

298

Preliminary Thermal Modeling of HI-STORM 100 Storage Modules at Diablo Canyon Power Plant ISFSI  

SciTech Connect (OSTI)

Thermal analysis is being undertaken at Pacific Northwest National Laboratory (PNNL) in support of inspections of selected storage modules at various locations around the United States, as part of the Used Fuel Disposition Campaign of the U.S. Department of Energy, Office of Nuclear Energy (DOE-NE) Fuel Cycle Research and Development. This report documents pre-inspection predictions of temperatures for two modules at the Diablo Canyon Power Plant ISFSI identified as candidates for inspection. These are HI-STORM 100 modules of a site-specific design for storing PWR 17x17 fuel in MPC-32 canisters. The temperature predictions reported in this document were obtained with detailed COBRA-SFS models of these storage systems, with the following boundary conditions and assumptions. • storage module overpack configuration based on FSAR documentation of HI-STORM100S-218, Version B; due to unavailability of site-specific design data for Diablo Canyon ISFSI modules • Individual assembly and total decay heat loadings for each canister, based on at-loading values provided by PG&E, “aged” to time of inspection using ORIGEN modeling o Special Note: there is an inherent conservatism of unquantified magnitude – informally estimated as up to approximately 20% -- in the utility-supplied values for at-loading assembly decay heat values • Axial decay heat distributions based on a bounding generic profile for PWR fuel. • Axial location of beginning of fuel assumed same as WE 17x17 OFA fuel, due to unavailability of specific data for WE17x17 STD and WE 17x17 Vantage 5 fuel designs • Ambient conditions of still air at 50°F (10°C) assumed for base-case evaluations o Wind conditions at the Diablo Canyon site are unquantified, due to unavailability of site meteorological data o additional still-air evaluations performed at 70°F (21°C), 60°F (16°C), and 40°F (4°C), to cover a range of possible conditions at the time of the inspection. (Calculations were also performed at 80°F (27°C), for comparison with design basis assumptions.) All calculations are for steady-state conditions, on the assumption that the surfaces of the module that are accessible for temperature measurements during the inspection will tend to follow ambient temperature changes relatively closely. Comparisons to the results of the inspections, and post-inspection evaluations of temperature measurements obtained in the specific modules, will be documented in a separate follow-on report, to be issued in a timely manner after the inspection has been performed.

Cuta, Judith M.; Adkins, Harold E.

2014-04-17T23:59:59.000Z

299

Recommended Best Practices for the Characterization of Storage Properties of Hydrogen Storage Materials- Section 6 Thermal Properties of Hydrogen Storage Materials  

Broader source: Energy.gov [DOE]

This report, written by H2 Technology Consulting, provides an introduction to and overview of the recommended best practices in making measurements of the hydrogen storage properties of materials.

300

Fundamental heat transfer processes related to phase change thermal storage media  

SciTech Connect (OSTI)

Research on fundamental heat transfer processes which occur in phase-change thermal storage systems is described. The research encompasses both melting and freezing, and includes both experiment and analysis. The status of four research problems is discussed. One of the freezing problems was focused on investigating, via experiment, the extent to which freezing can be enhanced by the attachment of fins to the external surface of a cooled vertical tube situated in a liquid phase-change medium. Very substantial enhancements were encountered which neutralize the degradation of freezing due to the thermal resistance of the frozen layer and to natural convection in the liquid phase. The second of the freezing problems was analytical in nature and sought to obtain solutions involving both the phase-change medium and the heat transfer fluid used either to add heat to or extract heat from the medium. For freezing on a plane wall, it was possible to obtain a closed-form analytical solution, while for freezing about a coolant-carrying circular tube, a new numerical methodology was devised to obtain finite-difference solutions. For melting, quantitative design-quality heat transfer coefficients were determined experimentally for melting adjacent to a heated vertical tube. These experiments explored the effects of solid-phase subcooling and of open versus closed top containment on the coefficients. A dimensionless correlation enables these results to be used for a wide range of phase-change media. Studies on melting of a phase-change material situated within a circular tube are in progress.

Sparrow, E. M.; Ramsey, J. W.

1981-01-01T23:59:59.000Z

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

A simulation software for cooling towers optimal operation  

SciTech Connect (OSTI)

Deregulation of power markets in Europe will facilitate competing alternatives in power supplies, more competitive energy prices and will improve customer service. The Romanian power sector is also characterized by profound transformation from old, polluting system to one reaching for efficiencies of market-driven economy. In order to reduce the production costs of combined electricity and heat generation power plants, the paper presents the software called CTO for optimization of the cross-current cooling tower`s operation. The optimum operation of the cooling tower will be that which performs the removal of the waste heat-of imposed thermal level- at a minimum specific cost. For different alternatives of the known input values and for all possible operation diagrams the cooling tower parameters are calculated through the developed software. As a result its optimum operation conditions are indicated.

Damian, M.; Motoiu, I.; Caracasian, L. [Inst. of Power Studies and Design, Bucharest (Romania)

1998-12-31T23:59:59.000Z

302

COBRA-SFS: A thermal-hydraulic analysis code for spent fuel storage and transportation casks  

SciTech Connect (OSTI)

COBRA-SFS is a general thermal-hydraulic analysis computer code for prediction of material temperatures and fluid conditions in a wide variety of systems. The code has been validated for analysis of spent fuel storage systems, as part of the Commercial Spent Fuel Management Program of the US Department of Energy. The code solves finite volume equations representing the conservation equations for mass, moment, and energy for an incompressible single-phase heat transfer fluid. The fluid solution is coupled to a finite volume solution of the conduction equation in the solid structure of the system. This document presents a complete description of Cycle 2 of COBRA-SFS, and consists of three main parts. Part 1 describes the conservation equations, constitutive models, and solution methods used in the code. Part 2 presents the User Manual, with guidance on code applications, and complete input instructions. This part also includes a detailed description of the auxiliary code RADGEN, used to generate grey body view factors required as input for radiative heat transfer modeling in the code. Part 3 describes the code structure, platform dependent coding, and program hierarchy. Installation instructions are also given for the various platform versions of the code that are available.

Michener, T.E.; Rector, D.R.; Cuta, J.M.; Dodge, R.E.; Enderlin, C.W.

1995-09-01T23:59:59.000Z

303

Potential industrial applications for composite phase-change materials as thermal energy storage media  

SciTech Connect (OSTI)

Considerable effort has been spent by the US Department of Energy and its contractors over the last few years to develop composite phase-change materials (CPCMs) for thermal energy storage (TES). This patented TES medium consists of a phase-change material (typically a salt or metal alloy) that is retained within the porous structure of a supporting material (typically a ceramic). The objectives of this study were to (1) introduce CPCMs to industries that may not otherwise be aware of them, (2) identify potentially attractive applications for CPCM in industry, (3) determine technical requirements that will affect the design of CPCM's for specific applications, and (4) generate interest among industrial firms for employing CPCM TES in their processes. The approach in this study was to examine a wide variety of industries using a series of screens to select those industries that would be most likely to adopt CPCM TES in their processes. The screens used in this study were process temperature, presence of time-varying energy flows, energy intensity of the industry, and economic growth prospects over the next 5 years. After identifying industries that passed all of the screens, representatives of each industry were interviewed by telephone to introduce them to CPCM TES, assess technical requirements for CPCM TES in their industry, and determine their interest in pursuing applications for CPCM TES. 11 refs., 4 tabs.

Spanner, G.E.; Wilfert, G.L.

1989-07-01T23:59:59.000Z

304

Optimal Deployment of Thermal Energy Storage under Diverse Economic and Climate Conditions  

SciTech Connect (OSTI)

This paper presents an investigation of the economic benefit of thermal energy storage (TES) for cooling, across a range of economic and climate conditions. Chilled water TES systems are simulated for a large office building in four distinct locations, Miami in the U.S.; Lisbon, Portugal; Shanghai, China; and Mumbai, India. Optimal system size and operating schedules are determined using the optimization model DER-CAM, such that total cost, including electricity and amortized capital costs are minimized. The economic impacts of each optimized TES system is then compared to systems sized using a simple heuristic method, which bases system size as fraction (50percent and 100percent) of total on-peak summer cooling loads. Results indicate that TES systems of all sizes can be effective in reducing annual electricity costs (5percent-15percent) and peak electricity consumption (13percent-33percent). The investigation also indentifies a number of criteria which drive TES investment, including low capital costs, electricity tariffs with high power demand charges and prolonged cooling seasons. In locations where these drivers clearly exist, the heuristically sized systems capture much of the value of optimally sized systems; between 60percent and 100percent in terms of net present value. However, in instances where these drivers are less pronounced, the heuristic tends to oversize systems, and optimization becomes crucial to ensure economically beneficial deployment of TES, increasing the net present value of heuristically sized systems by as much as 10 times in some instances.

DeForest, Nicolas; Mendes, Goncalo; Stadler, Michael; Feng, Wei; Lai, Judy; Marnay, Chris

2014-04-15T23:59:59.000Z

305

Seasonal Thermal Energy Storage Program: Progress summary for the period April 1986 through March 1988  

SciTech Connect (OSTI)

This report discusses recent progress in the DOE program, directed by Pacific Northwest Laboratory, to develop seasonal thermal energy storage (STES). STES has been identified as one method to substantially improve energy efficiency and economics in certain sectors of our economy. It provides a potentially economic means of using waste heat and climatic energy resources to meet a significant portion of our growing energy need for building and industrial process heating and cooling. Environmental benefits accompany the use of STES in many applications. Furthermore, STES can contribute to reduced reliance on premium fuels that are often obtained from foreign sources. Lastly by improving the energy economics of industry, STES can contribute to improved US industrial competitiveness. The report is provided in four sections; the first being this introduction Section 2 of the report describes the program and briefly documents its organization, goals, history, and long-term plans. Section 3 describes the progress during the period from April, 1986, through March, 1988. Section 4 provides a short update on international development of STES. 17 refs., 16 figs., 7 tabs.

Kannberg, L.D.

1988-10-01T23:59:59.000Z

306

Life Cycle Assessment of Thermal Energy Storage: Two-Tank Indirect and Thermocline  

SciTech Connect (OSTI)

In the United States, concentrating solar power (CSP) is one of the most promising renewable energy (RE) technologies for reduction of electric sector greenhouse gas (GHG) emissions and for rapid capacity expansion. It is also one of the most price-competitive RE technologies, thanks in large measure to decades of field experience and consistent improvements in design. One of the key design features that makes CSP more attractive than many other RE technologies, like solar photovoltaics and wind, is the potential for including relatively low-cost and efficient thermal energy storage (TES), which can smooth the daily fluctuation of electricity production and extend its duration into the evening peak hours or longer. Because operational environmental burdens are typically small for RE technologies, life cycle assessment (LCA) is recognized as the most appropriate analytical approach for determining their environmental impacts of these technologies, including CSP. An LCA accounts for impacts from all stages in the development, operation, and decommissioning of a CSP plant, including such upstream stages as the extraction of raw materials used in system components, manufacturing of those components, and construction of the plant. The National Renewable Energy Laboratory (NREL) is undertaking an LCA of modern CSP plants, starting with those of parabolic trough design.

Heath, G.; Turchi, C.; Burkhardt, J.; Kutscher, C.; Decker, T.

2009-07-01T23:59:59.000Z

307

Distributed Energy Resources On-Site Optimization for Commercial Buildings with Electric and Thermal Storage Technologies  

E-Print Network [OSTI]

efficiency requirements - Maximum emission limits Investment constraints: - Payback period is constrained Storage constraints: - Electricity stored is limited by battery

Stadler, Michael

2008-01-01T23:59:59.000Z

308

COBRA-SFS (Spent Fuel Storage): A thermal-hydraulic analysis computer code: Volume 3, Validation assessments  

SciTech Connect (OSTI)

This report presents the results of the COBRA-SFS (Spent Fuel Storage) computer code validation effort. COBRA-SFS, while refined and specialized for spent fuel storage system analyses, is a lumped-volume thermal-hydraulic analysis computer code that predicts temperature and velocity distributions in a wide variety of systems. Through comparisons of code predictions with spent fuel storage system test data, the code's mathematical, physical, and mechanistic models are assessed, and empirical relations defined. The six test cases used to validate the code and code models include single-assembly and multiassembly storage systems under a variety of fill media and system orientations and include unconsolidated and consolidated spent fuel. In its entirety, the test matrix investigates the contributions of convection, conduction, and radiation heat transfer in spent fuel storage systems. To demonstrate the code's performance for a wide variety of storage systems and conditions, comparisons of code predictions with data are made for 14 runs from the experimental data base. The cases selected exercise the important code models and code logic pathways and are representative of the types of simulations required for spent fuel storage system design and licensing safety analyses. For each test, a test description, a summary of the COBRA-SFS computational model, assumptions, and correlations employed are presented. For the cases selected, axial and radial temperature profile comparisons of code predictions with test data are provided, and conclusions drawn concerning the code models and the ability to predict the data and data trends. Comparisons of code predictions with test data demonstrate the ability of COBRA-SFS to successfully predict temperature distributions in unconsolidated or consolidated single and multiassembly spent fuel storage systems.

Lombardo, N.J.; Cuta, J.M.; Michener, T.E.; Rector, D.R.; Wheeler, C.L.

1986-12-01T23:59:59.000Z

309

COBRA-SFS (Spent Fuel Storage): A thermal-hydraulic analysis computer code: Volume 2, User's manual  

SciTech Connect (OSTI)

COBRA-SFS (Spent Fuel Storage) is a general thermal-hydraulic analysis computer code used to predict temperatures and velocities in a wide variety of systems. The code was refined and specialized for spent fuel storage system analyses for the US Department of Energy's Commercial Spent Fuel Management Program. The finite-volume equations governing mass, momentum, and energy conservation are written for an incompressible, single-phase fluid. The flow equations model a wide range of conditions including natural circulation. The energy equations include the effects of solid and fluid conduction, natural convection, and thermal radiation. The COBRA-SFS code is structured to perform both steady-state and transient calculations; however, the transient capability has not yet been validated. This volume contains the input instructions for COBRA-SFS and an auxiliary radiation exchange factor code, RADX-1. It is intended to aid the user in becoming familiar with the capabilities and modeling conventions of the code.

Rector, D.R.; Cuta, J.M.; Lombardo, N.J.; Michener, T.E.; Wheeler, C.L.

1986-11-01T23:59:59.000Z

310

COBRA-SFS (Spent Fuel Storage): A thermal-hydraulic analysis computer code: Volume 1, Mathematical models and solution method  

SciTech Connect (OSTI)

COBRA-SFS (Spent Fuel Storage) is a general thermal-hydraulic analysis computer code used to predict temperatures and velocities in a wide variety of systems. The code was refined and specialized for spent fuel storage system analyses for the US Department of Energy's Commercial Spent Fuel Management Program. The finite-volume equations governing mass, momentum, and energy conservation are written for an incompressible, single-phase fluid. The flow equations model a wide range of conditions including natural circulation. The energy equations include the effects of solid and fluid conduction, natural convection, and thermal radiation. The COBRA-SFS code is structured to perform both steady-state and transient calculations: however, the transient capability has not yet been validated. This volume describes the finite-volume equations and the method used to solve these equations. It is directed toward the user who is interested in gaining a more complete understanding of these methods.

Rector, D.R.; Wheeler, C.L.; Lombardo, N.J.

1986-11-01T23:59:59.000Z

311

ENERGY STORAGE IN AQUIFERS - - A SURVEY OF RECENT THEORETICAL STUDIES  

E-Print Network [OSTI]

temperature underground thermal energy storage. In Proc. Th~al modeling of thermal energy storage in aquifers. In ~~-Mathematical modeling; thermal energy storage; aquifers;

Tsang, Chin Fu

2013-01-01T23:59:59.000Z

312

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

313

Daily Texan April 1, 2014 Keeping Tower dark for Earth Hour was  

E-Print Network [OSTI]

of the University's Energy and Water Conservation program, said the Tower going dark was a gesture similarDaily Texan April 1, 2014 Keeping Tower dark for Earth Hour was intended to raise awareness British thermal units, of natural gas. According to the University's Utilities and Energy Management

John, Lizy Kurian

314

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...

315

Thermal storage for solar cooling using paired ammoniated salt reactors. Final report  

SciTech Connect (OSTI)

The objectives of the program were to investigate the feasibility of using various solid and liquid ammoniates in heat pump/thermal storage systems for space heating and cooling. The study included corrosion testing of selected metallic and non-metallic specimens in the ammoniates, subscale testing of the candidate ammoniates singly and in pairs, trade studies and conceptual design of a residential system, prototype testing, and ammoniation/deammoniation cyclic testing of manganese chloride. Results of the corrosion testing showed that problems exist with manganese and magnesium chloride ammoniates, except with the teflon which displayed excellent resistance in all environments. Also, all liquid ammoniates are unsuitable for use with uncoated carbon steel. Cycling of the manganese chloride between the high and low ammoniates does not affect its properties. However, the density change between the high and low ammoniates could cause packing problems in a reactor which constrains the salt volume. Subscale tests with solid ammoniates indicated that the heat transfer coefficient in a fixed bed reactor is low (approx. 1 Btu/h-ft/sup 2/-/sup 0/F). Therefore solid ammoniates are not practical because of the high heat exchanger cost requirement. Forced ammonia recirculation was tested as a means of increasing heat transfer rate in the fixed bed reactor with solid salts, but was not successful. Conversely, the subscale testing with liquid ammoniates produced heat transfer coefficients of 40 to 45 Btu/h-ft/sup 2/-/sup 0/F. Thus, the residential design was based on a liquid ammoniate/ammonia system using ammonium nitrate as the salt.

Not Available

1981-09-01T23:59:59.000Z

316

Thermal Storage Commercial Plant Design Study for a 2-Tank Indirect Molten Salt System: Final Report, 13 May 2002 - 31 December 2004  

SciTech Connect (OSTI)

Subcontract report by Nexant, Inc., and Kearney and Associates regarding a study of a solar parabolic trough commercial plant design with 2-tank indirect molten salt thermal storage system.

Kelly, B.; Kearney, D.

2006-07-01T23:59:59.000Z

317

Chiller Start/Stop Optimization for a Campus-wide Chilled Water System with a Thermal Storage Tank Under a Four-Period Electricity Rate Schedule  

E-Print Network [OSTI]

The existence of a 1.4-million-gallon chilled water thermal storage tank greatly increases the operational flexibility of a campuswide chilled water system under a four-part electricity rate structure. While significant operational savings can...

Zhou, J.; Wei, G.; Turner, W. D.; Deng, S.; Claridge, D.; Contreras, O.

2002-01-01T23:59:59.000Z

318

Analysis of novel, above-ground thermal energy storage concept utilizing low-cost, solid medium .  

E-Print Network [OSTI]

??Clean energy power plants cannot effectively match peak demands without utilizing energy storage technologies. Currently, several solutions address short term demand cycles, but little work… (more)

Barineau, Mark Michael

2010-01-01T23:59:59.000Z

319

Radiometric Modeling of Mechanical Draft Cooling Towers to Assist in the Extraction of their Absolute Temperature from  

E-Print Network [OSTI]

of remote thermal imagery. Knowledge of the temperature of the cooling towers is necessary for inputRadiometric Modeling of Mechanical Draft Cooling Towers to Assist in the Extraction of their Absolute Temperature from Remote Thermal Imagery Matthew Montanaroa, Carl Salvaggioa, Scott D. Browna

Salvaggio, Carl

320

Stellar Explosions by Magnetic Towers  

E-Print Network [OSTI]

We propose a magnetic mechanism for the collimated explosion of a massive star relevant for GRBs, XRFs and asymmetric supernovae. We apply Lynden-Bell's magnetic tower scenario to the interior of a massive rotating star after the core has collapsed to form a black hole with an accretion disk or a millisecond magnetar acting as a central engine. We solve the force-free Grad-Shafranov equation to calculate the magnetic structure and growth of a tower embedded in a stellar environment. The pressure of the toroidal magnetic field, continuously generated by differential rotation of the central engine, drives a rapid expansion which becomes vertically collimated after lateral force balance with the surrounding gas pressure is reached. The collimation naturally occurs because hoop stress concentrates magnetic field toward the rotation axis and inhibits lateral expansion. This leads to the growth of a self-collimated magnetic tower. When embedded in a massive star, the supersonic expansion of the tower drives a strong bow shock behind which an over-pressured cocoon forms. The cocoon confines the tower by supplying collimating pressure and provides stabilization against disruption due to MHD instabilities. Because the tower consists of closed field lines starting and ending on the central engine, mixing of baryons from the cocoon into the tower is suppressed. The channel cleared by the growing tower is thus plausibly free of baryons and allows the escape of magnetic energy from the central engine through the star. While propagating down the stellar density gradient, the tower accelerates and becomes relativistic. During the expansion, fast collisionless reconnection becomes possible resulting in dissipation of magnetic energy which may be responsible for GRB prompt emission.

Dmitri A. Uzdensky; Andrew I. MacFadyen

2006-05-05T23:59:59.000Z

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

University of Minnesota aquifer thermal energy storage (ATES) project report on the second long-term cycle  

SciTech Connect (OSTI)

The technical feasibility of high-temperature [>100{degrees}C (>212{degrees}F)] aquifer thermal energy storage (ATES) in a deep, confined aquifer was tested in a series of experimental cycles at the University of Minnesota`s St. Paul field test facility (FTF). This report describes the second long-term cycle (LT2), which was conducted from October 1986 through April 1987. Heat recovery; operational experience; and thermal, chemical, hydrologic, and geologic effects are reported. Approximately 61% of the 9.21 GWh of energy added to the 9.38 {times} 10{sup 4} m{sup 3} of ground water stored during LT2 was recovered. Temperatures of the water stored and recovered averaged 118{degrees}C (244{degrees}F) and 85{degrees}C (185{degrees}F), respectively. Results agreed with previous cycles conducted at the FTF. System operation during LT2 was nearly as planned. Operational experience from previous cycles at the FTF was extremely helpful. Ion-exchange softening of the heated and stored aquifer water prevented scaling in the system heat exchangers and the storage well, and changed the major-ion chemistry of the stored water. Sodium bicarbonate replaced magnesium and calcium bicarbonate as primary ions in the softened water. Water recovered form storage was approximately at equilibrium with respect to dissolved ions. Silica, calcium, and magnesium were significantly higher in recovered water than in injected water. Sodium was significantly lower in water recovered than in water stored.

Hoyer, M.C.; Hallgren, J.P.; Lauer, J.L.; Walton, M.; Eisenreich, S.J.; Howe, J.T.; Splettstoesser, J.F. [Minnesota Geological Survey, St. Paul, MN (United States)

1991-12-01T23:59:59.000Z

322

University of Minnesota aquifer thermal energy storage (ATES) project report on the second long-term cycle  

SciTech Connect (OSTI)

The technical feasibility of high-temperature (>100{degrees}C (>212{degrees}F)) aquifer thermal energy storage (ATES) in a deep, confined aquifer was tested in a series of experimental cycles at the University of Minnesota's St. Paul field test facility (FTF). This report describes the second long-term cycle (LT2), which was conducted from October 1986 through April 1987. Heat recovery; operational experience; and thermal, chemical, hydrologic, and geologic effects are reported. Approximately 61% of the 9.21 GWh of energy added to the 9.38 {times} 10{sup 4} m{sup 3} of ground water stored during LT2 was recovered. Temperatures of the water stored and recovered averaged 118{degrees}C (244{degrees}F) and 85{degrees}C (185{degrees}F), respectively. Results agreed with previous cycles conducted at the FTF. System operation during LT2 was nearly as planned. Operational experience from previous cycles at the FTF was extremely helpful. Ion-exchange softening of the heated and stored aquifer water prevented scaling in the system heat exchangers and the storage well, and changed the major-ion chemistry of the stored water. Sodium bicarbonate replaced magnesium and calcium bicarbonate as primary ions in the softened water. Water recovered form storage was approximately at equilibrium with respect to dissolved ions. Silica, calcium, and magnesium were significantly higher in recovered water than in injected water. Sodium was significantly lower in water recovered than in water stored.

Hoyer, M.C.; Hallgren, J.P.; Lauer, J.L.; Walton, M.; Eisenreich, S.J.; Howe, J.T.; Splettstoesser, J.F. (Minnesota Geological Survey, St. Paul, MN (United States))

1991-12-01T23:59:59.000Z

323

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

324

Efficient Phase-Change Materials: Development of a Low-Cost Thermal Energy Storage System Using Phase-Change Materials with Enhanced Radiation Heat Transfer  

SciTech Connect (OSTI)

HEATS Project: USF is developing low-cost, high-temperature phase-change materials (PCMs) for use in thermal energy storage systems. Heat storage materials are critical to the energy storage process. In solar thermal storage systems, heat can be stored in these materials during the day and released at night—when the sun is not out—to drive a turbine and produce electricity. In nuclear storage systems, heat can be stored in these materials at night and released to produce electricity during daytime peak-demand hours. Most PCMs do not conduct heat very well. Using an innovative, electroless encapsulation technique, USF is enhancing the heat transfer capability of its PCMs. The inner walls of the capsules will be lined with a corrosion-resistant, high-infrared emissivity coating, and the absorptivity of the PCM will be controlled with the addition of nano-sized particles. USF’s PCMs remain stable at temperatures from 600 to 1,000°C and can be used for solar thermal power storage, nuclear thermal power storage, and other applications.

None

2011-12-05T23:59:59.000Z

325

Thermal energy storage in phase change material. Final scientific report 1 Feb 81-31 Jan 82  

SciTech Connect (OSTI)

The present study deals with an experimental investigation of low temperature thermal storage based on macroencapsulation of Phase Change Material (PCM). The storage performance capabilities of capsule bed, tube bank and tubular single-pass heat exchanger are compared. The tests are conducted on the VKI Solar Utility Network (SUN) which is a closed loop facility designed to study air heating systems. An original data acquisition chain based on two conversing microprocessors is developed to carry out mass flow, pressure drop and temperature measurements. The experimental results are interpreted on the basis of comparison with numerical predictions and they allow to draw the following conclusions. Each type of matrix has its own range of operation for practical application but from a heat transfer standpoint, the PCM capsule packing unit is strongly recommended. It is suggested to extend this investigation to the effect of Reynolds number to find optimum range for thermo-mechanical efficiency.

White, P.; Buchlin, J-M.

1982-03-01T23:59:59.000Z

326

Cooling Towers, Energy Conservation Strategies  

E-Print Network [OSTI]

system. While our engineers are pretty well convinced of the importance of their sophisticated equipment, and rightly so, they take the cooling towers and the cold water returning from them for granted. Design Conditions are specified...

Burger, R.

1983-01-01T23:59:59.000Z

327

Cooling Towers, Energy Conservation Machines  

E-Print Network [OSTI]

Cooling towers, in all too many industrial plants, are often the neglected units of the process chain which are hidden bonanzas for energy conservation and dollar savings. By lowering the entire systems temperature by the use of colder water...

Burger, R.

1980-01-01T23:59:59.000Z

328

Analysis of novel, above-ground thermal energy storage concept utilizing low-cost, solid medium  

E-Print Network [OSTI]

Clean energy power plants cannot effectively match peak demands without utilizing energy storage technologies. Currently, several solutions address short term demand cycles, but little work has been done to address seasonal ...

Barineau, Mark Michael

2010-01-01T23:59:59.000Z

329

Evaluation of Representative Smart Grid Investment Grant Project Technologies: Thermal Energy Storage  

SciTech Connect (OSTI)

This document is one of a series of reports estimating the benefits of deploying technologies similar to those implemented on the Smart Grid Investment Grant (SGIG) projects. Four technical reports cover the various types of technologies deployed in the SGIG projects, distribution automation, demand response, energy storage, and renewables integration. A fifth report in the series examines the benefits of deploying these technologies on a national level. This technical report examines the impacts of energy storage technologies deployed in the SGIG projects.

Tuffner, Francis K.; Bonebrake, Christopher A.

2012-02-14T23:59:59.000Z

330

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

331

Distributed Energy Resources On-Site Optimization for Commercial Buildings with Electric and Thermal Storage Technologies  

SciTech Connect (OSTI)

The addition of storage technologies such as flow batteries, conventional batteries, and heat storage can improve the economic as well as environmental attractiveness of on-site generation (e.g., PV, fuel cells, reciprocating engines or microturbines operating with or without CHP) and contribute to enhanced demand response. In order to examine the impact of storage technologies on demand response and carbon emissions, a microgrid's distributed energy resources (DER) adoption problem is formulated as a mixed-integer linear program that has the minimization of annual energy costs as its objective function. By implementing this approach in the General Algebraic Modeling System (GAMS), the problem is solved for a given test year at representative customer sites, such as schools and nursing homes, to obtain not only the level of technology investment, but also the optimal hourly operating schedules. This paper focuses on analysis of storage technologies in DER optimization on a building level, with example applications for commercial buildings. Preliminary analysis indicates that storage technologies respond effectively to time-varying electricity prices, i.e., by charging batteries during periods of low electricity prices and discharging them during peak hours. The results also indicate that storage technologies significantly alter the residual load profile, which can contribute to lower carbon emissions depending on the test site, its load profile, and its adopted DER technologies.

Lacommare, Kristina S H; Stadler, Michael; Aki, Hirohisa; Firestone, Ryan; Lai, Judy; Marnay, Chris; Siddiqui, Afzal

2008-05-15T23:59:59.000Z

332

Tower Temperature and Humidity Sensors (TWR) Handbook  

SciTech Connect (OSTI)

Three tall towers are installed at the Atmospheric Radiation Measurement (ARM) Climate Research Facility: a 60-meter triangular tower at the Southern Great Plains (SGP) Central Facility (CF), a 21-meter walkup scaffolding tower at the SGP Okmulgee forest site (E21), and a 40-meter triangular tower at the North Slope of Alaska (NSA) Barrow site. The towers are used for meteorological, radiological, and other measurements.

Cook, DR

2010-02-01T23:59:59.000Z

333

Summary of: Simulating the Value of Concentrating Solar Power with Thermal Energy Storage in a Production Cost Model (Presentation)  

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.

2013-02-01T23:59:59.000Z

334

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

335

Effect of Thermal Aging on NO oxidation and NOx storage in a...  

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

More Documents & Publications Impacts of Biodiesel on Emission Control Devices NOx Abatement Research and Development CRADA with Navistar Incorporated Thermal Deactivation...

336

Cool Storage Performance  

E-Print Network [OSTI]

Utilities have promoted the use of electric heat and thermal storage to increase off peak usage of power. High daytime demand charges and enticing discounts for off peak power have been used as economic incentives to promote thermal storage systems...

Eppelheimer, D. M.

1985-01-01T23:59:59.000Z

337

Thermal Energy Storage Using Phase Change Materials in Corrugated Copper Panels  

E-Print Network [OSTI]

variations (Lane [2]; Abhat [3]). Latent heat storage has been researched and pioneered by Dr. Telkes in the 1940s (Lane [2]) and others. It did not receive much attention until the energy crisis of the late 1970s and 1980s when it was researched for use... in different applications especially for solar heating. The first application of PCM described in literature was their use for the heating and cooling of buildings by Telkes [4]. The storage capacity of a LHS system incorporating a PCM medium is given...

Aigbotsua, Clifford Okhumeode

2012-07-16T23:59:59.000Z

338

7.2.9. Tower 7.2.10. Winterdienstgebude /  

E-Print Network [OSTI]

.2.9.3.5.3 Überwachung der Kälteversorgung des Towers 7.2.9.3.6 Wärmeversorgung des Towers / Heat Supply of Tower 7

Berlin,Technische Universität

339

Innovative Application of Maintenance-Free Phase-Change Thermal Energy Storage for Dish-Engine Solar Power Generation  

SciTech Connect (OSTI)

This final report summarizes the final results of the Phase II Innovative Application of Maintenance-Free Phase-Change Thermal Energy Storage for Dish-Engine Solar Power Generation project being performed by Infinia Corporation for the U.S. Department of Energy under contract DE-FC36-08GO18157 during the project period of September 1, 2009 - August 30, 2012. The primary objective of this project is to demonstrate the practicality of integrating thermal energy storage (TES) modules, using a suitable thermal salt phase-change material (PCM) as its medium, with a dish/Stirling engine; enabling the system to operate during cloud transients and to provide dispatchable power for 4 to 6 hours after sunset. A laboratory prototype designed to provide 3 kW-h of net electrical output was constructed and tested at Infinia's Ogden Headquarters. In the course of the testing, it was determined that the system's heat pipe network - used to transfer incoming heat from the solar receiver to both the Stirling generator heater head and to the phase change salt - did not perform to expectations. The heat pipes had limited capacity to deliver sufficient heat energy to the generator and salt mass while in a charging mode, which was highly dependent on the orientation of the device (vertical versus horizontal). In addition, the TES system was only able to extract about 30 to 40% of the expected amount of energy from the phase change salt once it was fully molten. However, the use of heat pipes to transfer heat energy to and from a thermal energy storage medium is a key technical innovation, and the project team feels that the limitations of the current device could be greatly improved with further development. A detailed study of manufacturing costs using the prototype TES module as a basis indicates that meeting DOE LCOE goals with this hardware requires significant efforts. Improvement can be made by implementing aggressive cost-down initiatives in design and materials, improving system performance by boosting efficiencies, and by refining cost estimates with vendor quotes in lieu of mass-based approaches. Although the prototype did not fully demonstrate performance and realize projected cost targets, the project team believes that these challenges can be overcome. The test data showed that the performance can be significantly improved by refining the heat pipe designs. However, the project objective for phase 3 is to design and test on sun the field ready systems, the project team feels that is necessary to further refine the prototype heat pipe design in the current prototype TES system before move on to field test units, Phase 3 continuation will not be pursued.

Qui, Songgang [Temple University] [Temple University; Galbraith, Ross [Infinia] [Infinia

2013-01-23T23:59:59.000Z

340

Exergetic analysis of a steam-flashing thermal storage Paul T. O'Brien  

E-Print Network [OSTI]

conditions, although cost benefits are still evident. Currently, there are many solar power plants that have dispatchable, if not continuous, power output from a solar field. At the right cost, a storage system can improve overall economics of a solar energy system. Presented here is a simulation study

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

An investigation into the thermal properties of selected sensible and latent heat storage materials  

E-Print Network [OSTI]

in the latent heat of fusion. Considerable work has been done in analyzing latent heat storage systems. Telkes and Raymond [lj did early work with a sodium sulfate system using sealed drums. iVore recent experimental work was conducted with other salt...

Wood, Stanley Clayton

1982-01-01T23:59:59.000Z

342

Testing thermocline filler materials and molten-salt heat transfer fluids for thermal energy storage systems used in parabolic trough solar power plants.  

SciTech Connect (OSTI)

Parabolic trough power systems that utilize concentrated solar energy to generate electricity are a proven technology. Industry and laboratory research efforts are now focusing on integration of thermal energy storage as a viable means to enhance dispatchability of concentrated solar energy. One option to significantly reduce costs is to use thermocline storage systems, low-cost filler materials as the primary thermal storage medium, and molten nitrate salts as the direct heat transfer fluid. Prior thermocline evaluations and thermal cycling tests at the Sandia National Laboratories' National Solar Thermal Test Facility identified quartzite rock and silica sand as potential filler materials. An expanded series of isothermal and thermal cycling experiments were planned and implemented to extend those studies in order to demonstrate the durability of these filler materials in molten nitrate salts over a range of operating temperatures for extended timeframes. Upon test completion, careful analyses of filler material samples, as well as the molten salt, were conducted to assess long-term durability and degradation mechanisms in these test conditions. Analysis results demonstrate that the quartzite rock and silica sand appear able to withstand the molten salt environment quite well. No significant deterioration that would impact the performance or operability of a thermocline thermal energy storage system was evident. Therefore, additional studies of the thermocline concept can continue armed with confidence that appropriate filler materials have been identified for the intended application.

Kelly, Michael James; Hlava, Paul Frank; Brosseau, Douglas A.

2004-07-01T23:59:59.000Z

343

SMUD Kokhala Power Tower Study  

SciTech Connect (OSTI)

Kokhala is the name of a new hybridized power tower design which integrates a nitrate-salt solar power tower with a gas turbine combined-cycle power plant. This integration achieves high value energy, low costs, and lower investor risk than a conventional solar only power tower plant. One of the primary advantages of this system is that it makes small power tower plants much more economically competitive with conventional power generation technologies. This paper is an overview of a study that performed a conceptual evaluation of a small (30 MWe) commercial plant suitable for the Sacramento Municipal Utility District`s (SMUD) Rancho Seco power plant site near Sacramento, California. This paper discusses the motivation for using a small hybrid solar plant and provides an overview of the analysis methodology used in the study. The results indicate that a power tower integrated with an advanced gas turbine, combined with Sacramento`s summer solar resource, could produce a low- risk, economically viable power generation project in the near future.

Price, Henry W. [National Renewable Energy Laboratory, Golden, CO (United States); Whitney, Daniel D.; Beebe, H.I. [Sacramento Municipal Utility District, CA (United States)

1997-06-01T23:59:59.000Z

344

Molten Salt Nanomaterials for Thermal Energy Storage and Concentrated Solar Power Applications  

E-Print Network [OSTI]

The thermal efficiency of concentrated solar power (CSP) system depends on the maximum operating temperature of the system which is determined by the operating temperature of the TES device. Organic materials (such as synthetic oil, fatty acid...

Shin, Donghyun

2012-10-19T23:59:59.000Z

345

Cooling Strategies Based on Indicators of Thermal Storage in Commercial Building Mass  

E-Print Network [OSTI]

Building thermal mass and multi-day regimes of hot weather are important, yet poorly understood, contributors to cooling energy requirements. This paper develops load-shifting sub-cooling and precooling equipment operating strategies to address a...

Eto, J. H.

1985-01-01T23:59:59.000Z

346

Scenario Analysis of Peak Demand Savings for Commercial Buildings with Thermal Mass in California  

E-Print Network [OSTI]

by utilizing thermal energy storage such as ice storage orThermal Storage Utilization. ” Journal of Solar Energy

Yin, Rongxin

2010-01-01T23:59:59.000Z

347

Distributed Generation with Heat Recovery and Storage  

E-Print Network [OSTI]

in floor tiles for thermal energy storage,” working paper,D. R. (2000). Thermal energy storage for space cooling,A simple model of thermal energy storage is developed as a

Siddiqui, Afzal S.; Marnay, Chris; Firestone, Ryan M.; Zhou, Nan

2008-01-01T23:59:59.000Z

348

Domestic olivine vs magnesite as a thermal-energy-storage material: performance comparisons for electrically heated room-size units in accordance with ASHRAE Standard 94. 2  

SciTech Connect (OSTI)

Electrically heated thermal-energy-storage (TES) heaters employing high-heat-capacity ceramic refractories for sensible heat storage have been in use in Europe for several years. With these heaters, low cost off-peak electrical energy is stored by heating a storage core composed of ceramic material to approximately 800/sup 0/C. During the peak period, no electrical energy is used as the building heating needs are supplied by extracting the stored heat from the core by forced air circulation. Recently significant interest in the use of off-peak TES units in the US has occured, leading to the search for a domestic supply of high heat capacity ceramic refractory material. North Carolina's extensive but under-utilized supply of refractory grade olivine has been proposed as a source of storage material for these units. In this paper, the suitability of North Carolina olivine for heat-storage applications is assessed by comparing its thermal performance with that of European materials. Using the method of ASHRAE Standard 94.2, the thermal performance of two small room-sized commercially available TES units was determined experimentally with two different storage materials, North Carolina olivine and German magnesite. Comparisons between the two materials are made and conclusions are drawn.

Laster, W.R.; Schoenhals, R.J.; Gay, B.M.; Palmour, H. III

1982-01-01T23:59:59.000Z

349

CSP Tower Air Brayton Combustor  

Broader source: Energy.gov [DOE]

This fact sheet describes a concentrating solar power tower air Brayton combustor project awarded under the DOE's 2012 SunShot CSP R&D award program. The team, led by the Southwest Research Institute, is working to develop an external combustor that allows for the mixing of CSP-heated air with natural gas in hybridized power plants. This project aims to increase the temperature capabilities of the CSP tower air receiver and gas turbine to 1,000ºC and achieve energy conversion efficiencies greater than 50%.

350

Chilled Water Thermal Storage System and Demand Response at the University of California at Merced  

SciTech Connect (OSTI)

The University of California at Merced is a unique campus that has benefited from intensive efforts to maximize energy efficiency, and has participated in a demand response program for the past two years. Campus demand response evaluations are often difficult because of the complexities introduced by central heating and cooling, non-coincident and diverse building loads, and existence of a single electrical meter for the entire campus. At the University of California at Merced, a two million gallon chilled water storage system is charged daily during off-peak price periods and used to flatten the load profile during peak demand periods. This makes demand response more subtle and challenges typical evaluation protocols. The goal of this research is to study demand response savings in the presence of storage systems in a campus setting. First, University of California at Merced summer electric loads are characterized; second, its participation in two demand response events is detailed. In each event a set of strategies were pre-programmed into the campus control system to enable semi-automated response. Finally, demand savings results are applied to the utility's DR incentives structure to calculate the financial savings under various DR programs and tariffs. A key conclusion to this research is that there is significant demand reduction using a zone temperature set point change event with the full off peak storage cooling in use.

Granderson, Jessica; Dudley, Junqiao Han; Kiliccote, Sila; Piette, Mary Ann

2009-10-08T23:59:59.000Z

351

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

352

Cooling Tower Inspection with Scuba  

E-Print Network [OSTI]

tower pump suction basin was accomplished by diving into the basin using SCUBA gear. It was possible to see a build-up of debris on the pump suction basket strainers and on the floor of the sumps. Also, it was discovered that one of the four baskets had...

Brenner, W.

1982-01-01T23:59:59.000Z

353

Thermal treatment effects on charge storage performance of graphene-based materials for supercapacitors  

SciTech Connect (OSTI)

Graphene materials were synthesized by reduction of exfoliated graphene oxide sheets by hydrazine hydrate and then thermally treated in nitrogen to improve the surface area and their electrochemical performance as electrical double-layer capacitor electrodes. The structural and surface properties of the prepared reduced graphite oxide (RGO) were investigated using atomic force microscopy, scanning electron microscopy, Raman spectra, X-ray diffraction, and nitrogen adsorption / desorption. RGO forms a continuous network of crumpled sheets, which consist of numerous few-layer and single-layer graphenes. Electrochemical studies were conducted by cyclic voltammetry, impedance spectroscopy, and galvanostatic charge-discharge measurements. The modified RGO materials showed enhanced electrochemical performance, with maximum specific capacitance of 96 F/g, energy density of 12.8 Wh/kg, and power density of 160 kW/kg. The results demonstrate that thermal treatment of RGO at selected conditions is a convenient and efficient method for improving specific capacitance, energy, and power density.

Zhang, Hongxin [ORNL; Bhat, Vinay V [ORNL; Gallego, Nidia C [ORNL; Contescu, Cristian I [ORNL

2012-01-01T23:59:59.000Z

354

Thermal Storage for Energy Efficient Structures (Poteet High School Case Study)  

E-Print Network [OSTI]

and cooling valves in sequence for temperature control. Ventilation air dampers and control valves close when units are de-energized. I. DDC CONTROL SYSTEM Controls equipment, provides system operation information, generates historical data files... with air units or fan and coil units with hot and chilled water coils. Whenever occupancy is sensed the lights and HVAC equipment are energized and automatically oontrolled by sequencing coil valves to maintain the temperature setting. The thermal...

Utesch, A. L.

1988-01-01T23:59:59.000Z

355

Light storage via coherent population oscillation in a thermal cesium vapor  

E-Print Network [OSTI]

We report on the storage of light via the phenomenon of Coherent Population Oscillation (CPO) in an atomic cesium vapor at room temperature. In the experiment the optical information of a probe field is stored in the CPO of two ground states of a Lambda three-level system formed by the Zeeman sublevels of the hyperfine transition F = 3 - F' = 2 of cesium D2 line. We show directly that this CPO based memory is very insensitive to stray magnetic field inhomogeneities and presents a lifetime which is mainly limited only by atomic motion. A theoretical simulation of the measured spectra was also developed and is in very good agreement with the experiment.

A. J. F. de Almeida; J. Sales; M. -A. Maynard; T. Laupretre; F. Bretenaker; D. Felinto; F. Goldfarb; J. W. R. Tabosa

2014-09-19T23:59:59.000Z

356

Thermal Storage R&D for CSP Systems | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from theDepartment of EnergyThe Sun and Its Energy (11 activities)TheofThermal

357

The Volatility and the Thermal Storage Performance of Binary Polyalcohol Systems Used in the Wall  

E-Print Network [OSTI]

. The structural and chemical analyses of a kind of shape-stabilized paraffin. ACTA Energiae Solaris Sinica. 2000, 21(4):4 421. (in Chinese) Qin Penghua, Yang Rui, Zhang Yinping etc.. Thermal performance of shape-stabilized phase change materials. J (in... Chinese) Fan Yaofeng, Zhang Xinxiang. Progress in studies of solid-solid phase change materials. REVIEW OF MATERIALS. 2003,17(7):50-53. (in Ch [10] Ruan Deshui?Zhang Taiping. DSC Research of phase change materials. ACTA Energiae Solaris Sinica...

Yan, Q.

2006-01-01T23:59:59.000Z

358

Thermal Performance of Phase Change Wallboard for Residential Cooling Application  

E-Print Network [OSTI]

the discharge of thermal energy storage without releasingto low-energy cooling sources. Large thermal storage devices

Feustel, H.E.

2011-01-01T23:59:59.000Z

359

Preliminary Thermal Modeling of HI-Storm 100S-218 Version B Storage Modules at Hope Creek Cuclear Power Station ISFSI  

SciTech Connect (OSTI)

As part of the Used Fuel Disposition Campaign of the U. S. Department of Energy, Office of Nuclear Energy (DOE-NE) Fuel Cycle Research and Development, a consortium of national laboratories and industry is performing visual inspections and temperature measurements of selected storage modules at various locations around the United States. This report documents thermal analyses in in support of the inspections at the Hope Creek Nuclear Generating Station ISFSI. This site utilizes the HI-STORM100 vertical storage system developed by Holtec International. This is a vertical storage module design, and the thermal models are being developed using COBRA-SFS (Michener, et al., 1987), a code developed by PNNL for thermal-hydraulic analyses of multi assembly spent fuel storage and transportation systems. This report describes the COBRA-SFS model in detail, and presents pre-inspection predictions of component temperatures and temperature distributions. The final report will include evaluation of inspection results, and if required, additional post-test calculations, with appropriate discussion of results.

Cuta, Judith M.; Adkins, Harold E.

2013-08-30T23:59:59.000Z

360

Vortex-augmented cooling tower - windmill combination  

DOE Patents [OSTI]

A cooling tower for cooling large quantities of effluent water from a production facility by utilizing natural wind forces includes the use of a series of helically directed air inlet passages extending outwardly from the base of the tower to introduce air from any direction in a swirling vortical pattern while the force of the draft created in the tower makes it possible to place conventional power generating windmills in the air passage to provide power as a by-product.

McAllister, J.E. Jr.

1982-09-02T23:59:59.000Z

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

Thermal Energy Storage for Electricity Peak-demand Mitigation: A Solution in Developing and Developed World Alike  

SciTech Connect (OSTI)

In much of the developed world, air-conditioning in buildings is the dominant driver of summer peak electricity demand. In the developing world a steadily increasing utilization of air-conditioning places additional strain on already-congested grids. This common thread represents a large and growing threat to the reliable delivery of electricity around the world, requiring capital-intensive expansion of capacity and draining available investment resources. Thermal energy storage (TES), in the form of ice or chilled water, may be one of the few technologies currently capable of mitigating this problem cost effectively and at scale. The installation of TES capacity allows a building to meet its on-peak air conditioning load without interruption using electricity purchased off-peak and operating with improved thermodynamic efficiency. In this way, TES has the potential to fundamentally alter consumption dynamics and reduce impacts of air conditioning. This investigation presents a simulation study of a large office building in four distinct geographical contexts: Miami, Lisbon, Shanghai, and Mumbai. The optimization tool DER-CAM (Distributed Energy Resources Customer Adoption Model) is applied to optimally size TES systems for each location. Summer load profiles are investigated to assess the effectiveness and consistency in reducing peak electricity demand. Additionally, annual energy requirements are used to determine system cost feasibility, payback periods and customer savings under local utility tariffs.

DeForest, Nicholas; Mendes, Goncalo; Stadler, Michael; Feng, Wei; Lai, Judy; Marnay, Chris

2013-06-02T23:59:59.000Z

362

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

363

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

E-Print Network [OSTI]

Proceedings on thermal energy storage and energy conversion;polymer microcomposites for thermal energy storage. SAE SocLow temperature thermal energy storage: a state of the art

Roshandell, Melina

2013-01-01T23:59:59.000Z

364

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

E-Print Network [OSTI]

on Sustainable thermal Energy Storage Technologies, Part I:2009, “Review on Thermal Energy Storage with Phase Change2002, “Survey of Thermal Energy Storage for Parabolic Trough

Coso, Dusan

2013-01-01T23:59:59.000Z

365

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

E-Print Network [OSTI]

Review on Sustainable thermal Energy Storage Technologies,D. , 2009, “Review on Thermal Energy Storage with PhaseW. , 2002, “Survey of Thermal Energy Storage for Parabolic

Coso, Dusan

2013-01-01T23:59:59.000Z

366

Pueblo Towers | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExploration JumpSanyalTempWellheadWahkiakum County Place: WashingtonTowers Jump to:

367

Sandia National Laboratories: Solar Tower  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErikGroundbreaking WorkTransformationSitingMoltenTower Solar CSP R&D

368

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

369

A Microcomputer Model of Crossflow Cooling Tower Performance  

E-Print Network [OSTI]

The energy use characteristics of evaporative cooling towers are of interest because, although such towers are widely used in industry, they do require a substantial amount of energy. Evaporative cooling towers are basically large heat exchangers...

Reichelt, G. E; Jones, J. W.

1984-01-01T23:59:59.000Z

370

Targeting adequate thermal stability and fire safety in selecting ionic liquid-based electrolytes for energy storage  

E-Print Network [OSTI]

for energy storage L. Chancelier,a,b A.O. Diallo,c,d C.C. Santini,*a G. Marlair,*c T. Gutel,b S. Mailley,b C Abstract The energy storage market relating to lithium based systems regularly grows in size and expands for the promotion of a new generation of energy storage systems. These systems must be capable of addressing

Paris-Sud XI, Université de

371

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

density, making direct thermal energy storage methods, e.g.reduced. Conventional thermal energy harvesting and storageharvesting, storage, and utilization of thermal energy has

Lim, Hyuck

2011-01-01T23:59:59.000Z

372

Optimal sequencing of a cooling tower with multiple cells  

E-Print Network [OSTI]

This paper evaluates the energy savings potential of multi-cell cooling tower optimal sequencing control methods. Annual tower fan energy usage is calculated for a counter-flow tower with multiple variable-speed fans. Effectiveness-NTU tower model...

Zhang, Z.; Liu, J.

2012-01-01T23:59:59.000Z

373

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

374

Effects of guy wires on SWECS tower dynamics. Technical report  

SciTech Connect (OSTI)

The Rocky Flats (RF) Supporting Research and Technology (SRT) study for tower testing/analysis has led to some useful information concerning the effect of tower guy pretension on small wind system tower dynamics. The effect of guy-wire pretension on tower natural frequencies is usually considered negligible if the guy: (1) has no sag caused by gravity, and (2) the tension is not approaching the tower buckling load. At the rf test center it was found that, for the test tower even when these conditions were avoided, the guy fundamental frequency must be 30% greater than the tower fundamental frequency to maintain the fundamental's characteristics.

Butterfield, C P; Pykkonen, K R; Sexton, J H

1980-07-01T23:59:59.000Z

375

Cooling Towers--Energy Conservation Strategies  

E-Print Network [OSTI]

A cooling water system can be optimized by operating the cooling tower at the highest possible cycles of concentration without risking sealing and fouling of heat exchanger surfaces, tube bundles, refrigeration equipment, overhead condensers...

Matson, J.

376

Projective preservation : reframing Rudolph's Tower for Boston  

E-Print Network [OSTI]

By 2012, the fate of Paul Rudolph's tower in downtown Boston has been in question for years while a vision of a denser city calls for its demolition. Projected development on the site currently argues that to move forward, ...

Turner, Jessica K

2012-01-01T23:59:59.000Z

377

Cooling Towers, The Neglected Energy Resource  

E-Print Network [OSTI]

Loving care is paid to the compressors, condensers, and computer programs of refrigeration systems. When problems arise, operator: run around in circles with expensive "fixes", but historically ignore the poor orphan, the cooling tower perched...

Burger, R.

1985-01-01T23:59:59.000Z

378

Advanced wet-dry cooling tower concept  

E-Print Network [OSTI]

The purpose of this years' work has been to test and analyze the new dry cooling tower surface previously developed. The model heat transfer test apparatus built last year has been instrumented for temperature, humidity ...

Snyder, Troxell Kimmel

379

Hydraulic Cooling Tower Driver- The Innovation  

E-Print Network [OSTI]

One of the weaknesses of present day cooling tower drives are fan wrecks caused by shaft couplings breaking, gear box malfunctions due to inadequate lubrication, gear tooth wear, and inaccessibility for inspection and routine maintenance. The hydro...

Dickerson, J. A.

380

Design of a water tower energy storage system .  

E-Print Network [OSTI]

??This project is aimed at supporting the Mizzou Advantage strategic initiative in the area of Sustainable Energy. In particular, the project focuses on preparatory studies… (more)

Giri, Sagar Kishor

2013-01-01T23:59:59.000Z

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

Hydrogen Storage in Wind Turbine Towers: Cost Analysis and Conceptual  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:GroundtoProduction TechnicalSensor

382

Cooling Towers, The Neglected Energy Resource  

E-Print Network [OSTI]

COOLING TOWERS, THE NEGLECTED ENERGY RESOURCE ROBERT BURGER President, Burger Associates, Inc. Dallas, Texas (USA) Loving care is paid to the compress ors, condensers, and computer programs of refrigeration and air conditioning systems... is too hot, high temperature cut-outs occur and more energy must be provided to the motors to maintain the refrigeration cycle. COOLING TOWERS: 1) are just as important a link in the chain as the other equipment, 2) are an important source...

Burger, R.

383

Effect of Gaseous Impurities on Long-Term Thermal Cycling and Aging Properties of Complex Hydrides for Hydrogen Storage  

SciTech Connect (OSTI)

This program was dedicated to understanding the effect of impurities on Long-Term Thermal Cycling and aging properties of Complex Hydrides for Hydrogen Storage. At the start of the program we found reversibility between Li2NH+LiH ? LiH+LiNH2 (yielding ~5.8 wt.%H capacity). Then we tested the effect of impurity in H2 gas by pressure cycling at 255oC; first with industrial gas containing ppm levels of O2 and H2O as major impurities. Both these impurities had a significant impact on the reversibility and decreased the capacity by 2.65 wt.%H. Further increase in number of cycles from 500 to 1100 showed only a 0.2 wt%H more weight loss, showing some capacity is still maintained after a significant number of cycles. The loss of capacity is attributed to the formation of ~55 wt% LiH and ~30% Li2O, as major contaminant phases, along with the hydride Li2NH phase; suggesting loss of nitrogen during cycling. The effect of 100 ppm H2O in H2 also showed a decrease of ~2.5 wt.%H (after 560 cycles), and 100ppm O2 in H2; a loss of ~4.1 wt.%. Methane impurity (100 ppm, 100cycles), showed a very small capacity loss of 0.9 wt.%H under similar conditions. However, when Li3N was pressure cycled with 100ppmN2-H2 there were beneficial effects were observed (255oC); the reversible capacity increased to 8.4wt.%H after 853 cycles. Furthermore, with 20 mol.%N2-H2 capacity increased to ~10 wt.%H after 516 cycles. We attribute this enhancement to the reaction of nitrogen with liquid lithium during cycling as the Gibbs free energy of formation of Li3N (?Go = -98.7 kJ/mol) is more negative than that of LiH (?Go = -50.3 kJ/mol). We propose that the mitigation of hydrogen capacity losses is due to the destabilization of the LiH phase that tends to accumulate during cycling. Also more Li2NH phase was found in the cycled product. Mixed Alanates (3LiNH2:Li3AlH6) showed that 7 wt% hydrogen desorbed under dynamic vacuum. Equilibrium experiments (maximum 12 bar H2) showed up to 4wt% hydrogen reversibly stored in the material after the first desorption. The activation energy was found to be 51 kJ/mol, as compared to 81 kJ/mol for pure lithium alanate. It is proposed that based on the data obtained and CALPHAD modeling that the improvement in cycling is due to the formation of pure lithium (liquid at 255oC), which is able to react with nitrogen specifically forming Li3N. The presence of nitrogen in the 80/20 molar mixtures in a hydride bed along with hydrogen causes Li to form Li3N rather than LiH, and subsequently regenerates the Li2NH phase and yields a ~10 wt.%H reversibly.

Chandra, Dhanesh (Primary Contact); Lamb, Joshua; Chien, Wen-Ming; Talekar, Anjali; and Pal, Narendra.

2011-03-28T23:59:59.000Z

384

Feasibility study for measurement of insulation compaction in the cryogenic rocket fuel storage tanks at Kennedy Space Center by fast/thermal neutron techniques  

SciTech Connect (OSTI)

The liquid hydrogen and oxygen cryogenic storage tanks at John F. Kennedy Space Center (KSC) use expanded perlite as thermal insulation. Some of the perlite may have compacted over time, compromising the thermal performance and also the structural integrity of the tanks. Neutrons can readily penetrate through the 1.75 cm outer steel shell and through the entire 120 cm thick perlite zone. Neutrons interactions with materials produce characteristic gamma rays which are then detected. In compacted perlite the count rates in the individual peaks in the gamma ray spectrum will increase. Portable neutron generators can produce neutron simultaneous fluxes in two energy ranges: fast (14 MeV) and thermal (25 meV). Fast neutrons produce gamma rays by inelastic scattering which is sensitive to Si, Al, Fe and O. Thermal neutrons produce gamma rays by radiative capture in prompt gamma neutron activation (PGNA), which is sensitive to Si, Al, Na, K and H among others. The results of computer simulations using the software MCNP and measurements on a test article suggest that the most promising approach would be to operate the system in time-of-flight mode by pulsing the neutron generator and observing the subsequent die away curve in the PGNA signal.

Livingston, R. A. [Materials Science and Engineering Dept., U. of Maryland, College Park, MD (United States); Schweitzer, J. S. [Physics Dept., U. of Connecticut, Storrs (United States); Parsons, A. M. [Goddard Space Flight Center, Greenbelt (United States); Arens, E. E. [John F. Kennedy Space Center, FL (United States)

2014-02-18T23:59:59.000Z

385

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

E-Print Network [OSTI]

Thermal Energy Storage,” Renewable and Sustainable EnergyReview on Sustainable thermal Energy Storage Technologies,Energy Storage Using Phase Change Materials,” Renewable and Sustainable Energy

Coso, Dusan

2013-01-01T23:59:59.000Z

386

Numerical and Experimental Investigation of Inorganic Nanomaterials for Thermal Energy Storage (TES) and Concentrated Solar Power (CSP) Applications  

E-Print Network [OSTI]

maximizing the thermal conductivity of the nanomaterial (which typically occurs for nanoparticle size varying between ~ 20-30nm) and maximizing the specific heat capacity (which typically occurs for nanoparticle size less than 5nm), while simultaneously...

Jung, Seunghwan

2012-07-16T23:59:59.000Z

387

Integrated Building Energy Systems Design Considering Storage Technologies  

E-Print Network [OSTI]

could be acquired, e.g. battery storage, the costs for whichlead/acid battery, and thermal storage, capabilities, witha) thermal storage 8 IV) flow battery V) absorption chiller

Stadler, Michael

2009-01-01T23:59:59.000Z

388

ENERGY STORAGE IN AQUIFERS - - A SURVEY OF RECENT THEORETICAL STUDIES  

E-Print Network [OSTI]

underground thermal energy storage. In Proc. Th~rmal1980), 'I'hermal energy storage? in a confined aquifer·--al modeling of thermal energy storage in aquifers. In ~~-

Tsang, Chin Fu

2013-01-01T23:59:59.000Z

389

Unique Solar Thermal Laboratory Gets an Upgrade | Department...  

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

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...

390

User manual for AQUASTOR: a computer model for cost analysis of aquifer thermal energy storage coupled with district heating or cooling systems. Volume I. Main text  

SciTech Connect (OSTI)

A computer model called AQUASTOR was developed for calculating the cost of district heating (cooling) using thermal energy supplied by an aquifer thermal energy storage (ATES) system. The AQUASTOR model can simulate ATES district heating systems using stored hot water or ATES district cooling systems using stored chilled water. AQUASTOR simulates the complete ATES district heating (cooling) system, which consists of two principal parts: the ATES supply system and the district heating (cooling) distribution system. The supply system submodel calculates the life-cycle cost of thermal energy supplied to the distribution system by simulating the technical design and cash flows for the exploration, development, and operation of the ATES supply system. The distribution system submodel calculates the life-cycle cost of heat (chill) delivered by the distribution system to the end-users by simulating the technical design and cash flows for the construction and operation of the distribution system. The model combines the technical characteristics of the supply system and the technical characteristics of the distribution system with financial and tax conditions for the entities operating the two systems into one techno-economic model. This provides the flexibility to individually or collectively evaluate the impact of different economic and technical parameters, assumptions, and uncertainties on the cost of providing district heating (cooling) with an ATES system. This volume contains the main text, including introduction, program description, input data instruction, a description of the output, and Appendix H, which contains the indices for supply input parameters, distribution input parameters, and AQUASTOR subroutines.

Huber, H.D.; Brown, D.R.; Reilly, R.W.

1982-04-01T23:59:59.000Z

391

Integrated Building Energy Systems Design Considering Storage Technologies  

E-Print Network [OSTI]

photovoltaic, software, solar thermal systems Abstract Theinteractions among PV, solar thermal, and storage systemsstorage, PV, as well as solar thermal system adoption, two

Stadler, Michael

2009-01-01T23:59:59.000Z

392

Lifting system and apparatus for constructing wind turbine towers  

DOE Patents [OSTI]

The disclosed invention is utilized for mounting a wind turbine and blade assembly on the upper end of a wind turbine tower. The invention generally includes a frame or truss that is pivotally secured to the top bay assembly of the tower. A transverse beam is connected to the frame or truss and extends fore of the tower when the frame or truss is in a first position and generally above the tower when in a second position. When in the first position, a wind turbine or blade assembly can be hoisted to the top of the tower. The wind turbine or blade assembly is then moved into position for mounting to the tower as the frame or truss is pivoted to a second position. When the turbine and blade assembly are secured to the tower, the frame or truss is disconnected from the tower and lowered to the ground.

Livingston, Tracy; Schrader, Terry; Goldhardt, James; Lott, James

2011-02-01T23:59:59.000Z

393

Digital places : rethinking urban elements : the case of the tower  

E-Print Network [OSTI]

Problem - How can we make working, living and all aspects of our life in the urban tower more palatable? How can we create environment at the urban tower scale. With technology as one of the biggest drivers of social and ...

Gichuhi, Christopher M. (Christopher Mwethera), 1976-

2004-01-01T23:59:59.000Z

394

Wind Turbine Towers Establish New Height Standards and Reduce...  

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

Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy Case study that...

395

Lab Helps FAA Build Energy-Efficient Control Towers | Department...  

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

Lab Helps FAA Build Energy-Efficient Control Towers Lab Helps FAA Build Energy-Efficient Control Towers April 23, 2010 - 10:57am Addthis With help from the Pacific Northwest...

396

Boise Air Traffic Control Tower: High Performance and sustainable Building Guiding Principles Technical Assistance  

SciTech Connect (OSTI)

Overview of energy efficiency opportunities for new FAA tower construction using the Boise Air Traffic Control Tower as an example.

Fowler, Kimberly M.; Goel, Supriya; Henderson, Jordan W.

2013-09-01T23:59:59.000Z

397

Incorporating supercritical steam turbines into molten-salt power tower plants : feasibility and performance.  

SciTech Connect (OSTI)

Sandia National Laboratories and Siemens Energy, Inc., examined 14 different subcritical and supercritical steam cycles to determine if it is feasible to configure a molten-salt supercritical steam plant that has a capacity in the range of 150 to 200 MWe. The effects of main steam pressure and temperature, final feedwater temperature, and hot salt and cold salt return temperatures were determined on gross and half-net efficiencies. The main steam pressures ranged from 120 bar-a (subcritical) to 260 bar-a (supercritical). Hot salt temperatures of 566 and 600%C2%B0C were evaluated, which resulted in main steam temperatures of 553 and 580%C2%B0C, respectively. Also, the effects of final feedwater temperature (between 260 and 320%C2%B0C) were evaluated, which impacted the cold salt return temperature. The annual energy production and levelized cost of energy (LCOE) were calculated using the System Advisory Model on 165 MWe subcritical plants (baseline and advanced) and the most promising supercritical plants. It was concluded that the supercritical steam plants produced more annual energy than the baseline subcritical steam plant for the same-size heliostat field, receiver, and thermal storage system. Two supercritical steam plants had the highest annual performance and had nearly the same LCOE. Both operated at 230 bar-a main steam pressure. One was designed for a hot salt temperature of 600%C2%B0C and the other 565%C2%B0C. The LCOEs for these plants were about 10% lower than the baseline subcritical plant operating at 120 bar-a main steam pressure and a hot salt temperature of 565%C2%B0C. Based on the results of this study, it appears economically and technically feasible to incorporate supercritical steam turbines in molten-salt power tower plants.

Pacheco, James Edward; Wolf, Thorsten [Siemens Energy, Inc., Orlando, FL; Muley, Nishant [Siemens Energy, Inc., Orlando, FL

2013-03-01T23:59:59.000Z

398

Structural Optimization of High Voltage Transmission Line Towers considering  

E-Print Network [OSTI]

Structural Optimization of High Voltage Transmission Line Towers considering Continuum and Discrete/or to common designs largely repeated (e.g. automotive compo- nents), and high voltage transmission towers can than conventional designs of high voltage transmission line towers. The optimization model proposed

Colominas, Ignasi

399

Preliminary Thermal Modeling of Hi-Storm 100S-218 Version B Storage Modules at Hope Creek Nuclear Power Station ISFSI  

SciTech Connect (OSTI)

This report fulfills the M3 milestone M3FT-13PN0810022, “Report on Inspection 1”, under Work Package FT-13PN081002. Thermal analysis is being undertaken at Pacific Northwest National Laboratory (PNNL) in support of inspections of selected storage modules at various locations around the United States, as part of the Used Fuel Disposition Campaign of the U.S. Department of Energy, Office of Nuclear Energy (DOE-NE) Fuel Cycle Research and Development. This report documents pre-inspection predictions of temperatures for four modules at the Hope Creek Nuclear Generating Station ISFSI that have been identified as candidates for inspection in late summer or early fall/winter of 2013. These are HI-STORM 100S-218 Version B modules storing BWR 8x8 fuel in MPC-68 canisters. The temperature predictions reported in this document were obtained with detailed COBRA-SFS models of these four storage systems, with the following boundary conditions and assumptions.

Cuta, Judith M.; Adkins, Harold E.

2013-08-30T23:59:59.000Z

400

Untapped Energy Savings from Cooling Towers  

E-Print Network [OSTI]

source of energy and monetary savings. Many of these savings can come from simple maintenance or by changing the way the tower is operated. The more dramatic savings can come from changing to advanced fill concepts. Over our 40 years of working...

Phelps Jr., P.

2011-01-01T23:59:59.000Z

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

Project Profile: Sensible Heat, Direct, Dual-Media Thermal Energy...  

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

Sensible Heat, Direct, Dual-Media Thermal Energy Storage Module Project Profile: Sensible Heat, Direct, Dual-Media Thermal Energy Storage Module Acciona logo Acciona Solar, under...

402

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States  

E-Print Network [OSTI]

optimal could be acquired. Battery storage costs are roughlylead/acid battery) and thermal storage, capabilities, withcell electric storage heat storage flow battery abs. chiller

Stadler, Michael

2009-01-01T23:59:59.000Z

403

User manual for AQUASTOR: a computer model for cost analysis of aquifer thermal-energy storage oupled with district-heating or cooling systems. Volume II. Appendices  

SciTech Connect (OSTI)

A computer model called AQUASTOR was developed for calculating the cost of district heating (cooling) using thermal energy supplied by an aquifer thermal energy storage (ATES) system. the AQUASTOR Model can simulate ATES district heating systems using stored hot water or ATES district cooling systems using stored chilled water. AQUASTOR simulates the complete ATES district heating (cooling) system, which consists of two prinicpal parts: the ATES supply system and the district heating (cooling) distribution system. The supply system submodel calculates the life-cycle cost of thermal energy supplied to the distribution system by simulating the technical design and cash flows for the exploration, development, and operation of the ATES supply system. The distribution system submodel calculates the life-cycle cost of heat (chill) delivered by the distribution system to the end-users by simulating the technical design and cash flows for the construction and operation of the distribution system. The model combines the technical characteristics of the supply system and the technical characteristics of the distribution system with financial and tax conditions for the entities operating the two systems into one techno-economic model. This provides the flexibility to individually or collectively evaluate the impact of different economic and technical parameters, assumptions, and uncertainties on the cost of providing district heating (cooling) with an ATES system. This volume contains all the appendices, including supply and distribution system cost equations and models, descriptions of predefined residential districts, key equations for the cooling degree-hour methodology, a listing of the sample case output, and appendix H, which contains the indices for supply input parameters, distribution input parameters, and AQUASTOR subroutines.

Huber, H.D.; Brown, D.R.; Reilly, R.W.

1982-04-01T23:59:59.000Z

404

Simplified Numerical Description of Latent Storage Characteristics for Phase Change Wallboard  

E-Print Network [OSTI]

the discharge of thermal energy storage without "dumping"thermal mass, and • utilize low-energy heating and cooling sources. Large thermal storagelow- energy cooling sources. Large thermal storage devices

Fuestel, H.E.

2011-01-01T23:59:59.000Z

405

Composite Tower Solutions | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions LLC Jump to: navigation, search Name:CXD) Jump23TechnologyTower

406

DOE Global Energy Storage Database  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The DOE International Energy Storage Database has more than 400 documented energy storage projects from 34 countries around the world. The database provides free, up-to-date information on grid-connected energy storage projects and relevant state and federal policies. More than 50 energy storage technologies are represented worldwide, including multiple battery technologies, compressed air energy storage, flywheels, gravel energy storage, hydrogen energy storage, pumped hydroelectric, superconducting magnetic energy storage, and thermal energy storage. The policy section of the database shows 18 federal and state policies addressing grid-connected energy storage, from rules and regulations to tariffs and other financial incentives. It is funded through DOE’s Sandia National Laboratories, and has been operating since January 2012.

407

LCA (Life Cycle Assessment) of Parabolic Trough CSP: Materials Inventory and Embodied GHG Emissions from Two-Tank Indirect and Thermocline Thermal Storage (Presentation)  

SciTech Connect (OSTI)

In the United States, concentrating solar power (CSP) is one of the most promising renewable energy (RE) technologies for reduction of electric sector greenhouse gas (GHG) emissions and for rapid capacity expansion. It is also one of the most price-competitive RE technologies, thanks in large measure to decades of field experience and consistent improvements in design. One of the key design features that makes CSP more attractive than many other RE technologies, like solar photovoltaics and wind, is the potential for including relatively low-cost and efficient thermal energy storage (TES), which can smooth the daily fluctuation of electricity production and extend its duration into the evening peak hours or longer. Because operational environmental burdens are typically small for RE technologies, life cycle assessment (LCA) is recognized as the most appropriate analytical approach for determining their environmental impacts of these technologies, including CSP. An LCA accounts for impacts from all stages in the development, operation, and decommissioning of a CSP plant, including such upstream stages as the extraction of raw materials used in system components, manufacturing of those components, and construction of the plant. The National Renewable Energy Laboratory (NREL) is undertaking an LCA of modern CSP plants, starting with those of parabolic trough design.

Heath, G.; Burkhardt, J.; Turchi, C.; Decker, T.; Kutscher, C.

2009-07-20T23:59:59.000Z

408

Reliability Analysis of Cooling Towers: Influence of Rebars Corrosion on Failure  

SciTech Connect (OSTI)

Natural-draught cooling towers are used in nuclear power plants as heat exchangers. These structures are submitted to environmental loads such as wind and thermal gradients that are stochastic in nature. A probabilistic framework has been developed by EDF (Electricite de France) for assessing the durability of such structures. In this paper, the corrosion of the rebars due to concrete carbonation and the corresponding weakening of the reinforced concrete sections is considered. Due to the presence of time in the definition of the limit state function associated with the loss of serviceability of the cooling tower, time-variant reliability analysis has to be used. A novel approach is proposed to take into account the random 'initiation time', which corresponds to the time necessary for the carbonation to attain the rebars. Results are given in terms of the probability of failure of the structure over its life time. (authors)

Sudret, Bruno [Electricite de France - EDF, Research and Development Division, Dpt of Materials and Mechanics of Components, Site des Renardieres, 77818 Moret-sur-Loing Cedex (France); Pendola, Maurice [PHI-MECA Engineering, 1 Allee Alan Turing, 63170 - Aubiere (France)

2002-07-01T23:59:59.000Z

409

Vortex-augmented cooling tower-windmill combination  

DOE Patents [OSTI]

A cooling tower for cooling large quantities of effluent water from a production facility by utilizing natural wind forces includes the use of a series of helically directed air inlet passages extending outwardly from the base of the tower to introduce air from any direction in a swirling vortical pattern while the force of the draft created in the tower makes it possible to place conventional power generating windmills in the air passages to provide power as a by-product.

McAllister, Jr., John E. (Aiken, SC)

1985-01-01T23:59:59.000Z

410

Upcoming Funding Opportunity for Tower Manufacturing and Installation...  

Office of Environmental Management (EM)

systems with hub heights of at least 120 meters. Scaling to taller towers allows wind turbines to capture less turbulent and often stronger wind resources, thereby increasing...

411

Upcoming Funding Opportunity for Tower Manufacturing and Installation...  

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

and logistics constraints affecting the deployment of taller utility-scale wind turbine systems with hub heights of at least 120 meters. Scaling to taller towers allows wind...

412

Comparative evaluation of cooling tower drift eliminator performance  

E-Print Network [OSTI]

The performance of standard industrial evaporative cooling tower drift eliminators is analyzed using experiments and numerical simulations. The experiments measure the

Chan, Joseph Kwok-Kwong

413

Solar power tower development: Recent experiences  

SciTech Connect (OSTI)

Recent experiences with the 10 MW{sub e} Solar Two and the 2.5 MW{sub t} TSA (Technology Program Solar Air Receiver) demonstration plants are reported. The heat transfer fluids used in these solar power towers are molten-nitrate salt and atmospheric air, respectively. Lessons learned and suggested technology improvements for next-generation plants are categorized according to subsystem. The next steps to be taken in the commercialization process for each these new power plant technologies is also presented.

Tyner, C.; Kolb, G.; Prairie, M. [and others

1996-12-01T23:59:59.000Z

414

ARM - Campaign Instrument - aerosol-tower-eml  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert SouthwestTechnologiesgovInstrumentsacr-jpl Comments? WegovInstrumentsaerosol-tower-eml

415

Towering Cumulus Stage Mature Stage Dissipating Stage  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism in Layered NbS2Topo II: An EnzymePersonal Computerso wSolutionTowering

416

Tower, Minnesota: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty LtdSteen,Ltd JumpOperations JumpTooele County, Utah:JumpVesselTower, Minnesota:

417

A STUDY OF ATES THERMAL BEHAVIOR USING A STEADY FLOW MODEL  

E-Print Network [OSTI]

and Warman, J.c. , "Thermal energy storage in a confinedProceedings of Thermal Energy Storage in Aquifers Workshop,c.F. , ~Aquifer thermal energy storage- parameter study,~

Doughty, Christine

2013-01-01T23:59:59.000Z

418

Thermochemical energy storage systems: modelling, analysis and design.  

E-Print Network [OSTI]

??Thermal energy storage (TES) is an advanced technology for storing thermal energy that can mitigate environmental impacts and facilitate more efficient and clean energy systems.… (more)

Haji Abedin, Ali

2010-01-01T23:59:59.000Z

419

Data Center Economizer Cooling with Tower Water; Demonstration of a  

E-Print Network [OSTI]

exchanger was configured to use higher temperature water produced by a cooling tower alone. The other coilLBNL-6660E Data Center Economizer Cooling with Tower Water; Demonstration of a Dual Heat Exchanger-temperature cooling water, so that it can support many more hours of free cooling compared to traditional systems

420

Experimental Investigation of the Padding Tower for Air Dehumidifier  

E-Print Network [OSTI]

. Under same solution flux, the total pressure drop of the tower adds lineally along with the increase of padding height. Fig. 2 (b) reflects the air vapor content variety at the tower outlet along with the padding filling height variety under...

Wang, J.; Liu, J.; Li, C.; Zhang, G.; An, S.

2006-01-01T23:59:59.000Z

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

E-Print Network 3.0 - airport control towers Sample Search Results  

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

3 Airport Tower Automation With the construction of Bergstrom International Airport in South Austin, the FAA has Summary: . The tower communicates with the airplanes via...

422

Purification of water from cooling towers and other heat exchange systems  

DOE Patents [OSTI]

The amount of silica in cooling tower water is reduced by passing cooling tower water through a column of silica gel.

Sullivan; Enid J. (Los Alamos, NM), Carlson; Bryan J. (Ojo Caliente, NM), Wingo; Robert M. (Los Alamos, NM), Robison; Thomas W. (Stilwell, KS)

2012-08-07T23:59:59.000Z

423

Tunable Electrical and Thermal Transport in Ice-Templated MultiLayer Graphene Nanocomposites  

E-Print Network [OSTI]

to electrical energy storage,1­3 thermal energy storage,4­13 and composite materials.14­21 Ice applications in thermal and electrical energy storage. Phase change thermal storage seeks to reduce building offsets in energy supply and demand.6 Thermal energy storage is also an appealing way to cool power

Maruyama, Shigeo

424

Tower reactors for bioconversion of lignocellulosic material  

DOE Patents [OSTI]

An apparatus for enzymatic hydrolysis and fermentation of pretreated lignocellulosic material, in the form of a tower bioreactor, having mixers to achieve intermittent mixing of the material. Precise mixing of the material is important for effective heat and mass transfer requirements without damaging or denaturing the enzymes or fermenting microorganisms. The pretreated material, generally in the form of a slurry, is pumped through the bioreactor, either upwards of downwards, and is mixed periodically as it passes through the mixing zones where the mixers are located. For a thin slurry, alternate mixing can be achieved by a pumping loop which also serves as a heat transfer device. Additional heat transfer takes place through the reactor heat transfer jackets.

Nguyen, Quang A. (16458 W. 1st Ave., Golden, CO 80401)

1998-01-01T23:59:59.000Z

425

Tower reactors for bioconversion of lignocellulosic material  

DOE Patents [OSTI]

An apparatus for enzymatic hydrolysis and fermentation of pretreated lignocellulosic material, in the form of a tower bioreactor, having mixers to achieve intermittent mixing of the material. Precise mixing of the material is important for effective heat and mass transfer requirements without damaging or denaturing the enzymes or fermenting microorganisms. The pretreated material, generally in the form of a slurry, is pumped through the bioreactor, either upwards or downwards, and is mixed periodically as it passes through the mixing zones where the mixers are located. For a thin slurry, alternate mixing can be achieved by a pumping loop which also serves as a heat transfer device. Additional heat transfer takes place through the reactor heat transfer jackets.

Nguyen, Quang A. (16458 W. 1st Ave., Golden, CO 80401)

1999-01-01T23:59:59.000Z

426

Tower reactors for bioconversion of lignocellulosic material  

DOE Patents [OSTI]

An apparatus is described for enzymatic hydrolysis and fermentation of pretreated lignocellulosic material, in the form of a tower bioreactor, having mixers to achieve intermittent mixing of the material. Precise mixing of the material is important for effective heat and mass transfer requirements without damaging or denaturing the enzymes or fermenting microorganisms. The pretreated material, generally in the form of a slurry, is pumped through the bioreactor, either upwards or downwards, and is mixed periodically as it passes through the mixing zones where the mixers are located. For a thin slurry, alternate mixing can be achieved by a pumping loop which also serves as a heat transfer device. Additional heat transfer takes place through the reactor heat transfer jackets. 5 figs.

Nguyen, Q.A.

1999-03-30T23:59:59.000Z

427

Tower reactors for bioconversion of lignocellulosic material  

DOE Patents [OSTI]

An apparatus is disclosed for enzymatic hydrolysis and fermentation of pretreated lignocellulosic material. The apparatus consists of a tower bioreactor which has mixers to achieve intermittent mixing of the material. Precise mixing of the material is important for effective heat and mass transfer requirements without damaging or denaturing the enzymes or fermenting microorganisms. The pretreated material, generally in the form of a slurry, is pumped through the bioreactor, either upwards or downwards, and is mixed periodically as it passes through the mixing zones where the mixers are located. For a thin slurry, alternate mixing can be achieved by a pumping loop which also serves as a heat transfer device. Additional heat transfer takes place through the reactor heat transfer jackets. 5 figs.

Nguyen, Q.A.

1998-03-31T23:59:59.000Z

428

Evaluating Availability of Networked Storages Using Commercial Workloads  

E-Print Network [OSTI]

, and disk faults into the SAN system, we observe and analyze system availability in terms of performability performability of the two SAN systems under different faulty conditions. It is observed that STICS-based SAN), and storage devices such as disk arrays, tapes, and CD towers etc. Little is understood about the effects

Yang, Qing "Ken"

429

Gas hydrate cool storage system  

DOE Patents [OSTI]

The invention presented relates to the development of a process utilizing a gas hydrate as a cool storage medium for alleviating electric load demands during peak usage periods. Several objectives of the invention are mentioned concerning the formation of the gas hydrate as storage material in a thermal energy storage system within a heat pump cycle system. The gas hydrate was formed using a refrigerant in water and an example with R-12 refrigerant is included. (BCS)

Ternes, M.P.; Kedl, R.J.

1984-09-12T23:59:59.000Z

430

Model Predictive Control for Energy Efficient Buildings  

E-Print Network [OSTI]

towers water pumps thermal storage tank water supply water loop system weather low-level MPC Setpoints Solar

Ma, Yudong

2012-01-01T23:59:59.000Z

431

Olivine refractory bricks for heat storage applications  

SciTech Connect (OSTI)

This invention relates to an olivine refractory brick having thermal and physical properties suitable for use as a thermal energy storage unit in an electric thermal storage furnace and characterized by having excellent thermal shock properties and resistance to spalling. The brick consists essentially of densely compacted grains of olivine and a plastic refractory kaolin binder which effects a sintered, liquid assisted but substantially solid state grain-to-grain bonding of the olivine grains.

Cochrane, R.L.; Gay, B.M.; Palmour, H.I.

1981-12-01T23:59:59.000Z

432

Introducing an Online Cooling Tower Performance Analysis Tool  

E-Print Network [OSTI]

and variable nature of all of the factors that can influence performance; fan speed, wind speed, sump temperature, heat load, ambient temperature, relative humidity, etc. This can be overwhelming for a regular operator resulting in many cooling towers being set...

Muller, M.R.; Muller, M.B.; Rao, P.

2012-01-01T23:59:59.000Z

433

Energy Efficiency Evaluation of Guangzhou West Tower Façade System  

E-Print Network [OSTI]

Guangzhou West Tower is an extremely tall public building. The energy efficiency evaluation of its façade should be different than that of ordinary public buildings. Based on the national code GB50189-2005, “Design Standard for Energy efficiency...

Meng, Q.; Zhang, L.

2006-01-01T23:59:59.000Z

434

Cooling Towers - Energy Conservation and Money Making Mechanisms  

E-Print Network [OSTI]

cooling towers in operation are performing at levels as low as 50% of capability. This is energy wasteful and financially foolish. There are many reasons for this deficiency, among them the present service is greater than the original requirements...

Burger, R.

1981-01-01T23:59:59.000Z

435

Wind Shear Characteristics at Central Plains Tall Towers: Preprint  

SciTech Connect (OSTI)

Conference paper for WindPower 2006 held June 4-7, 2006, in Pittsburgh, PA, describing the wind shear characteristics at tall tower sites in the Central Plains of the United States.

Schwartz, M.; Elliott, D.

2006-06-01T23:59:59.000Z

436

About the Design & Construction Collaborative Life Sciences Building & Skourtes Tower  

E-Print Network [OSTI]

About the Design & Construction Collaborative Life Sciences Building & Skourtes Tower With an emphasis on connection, the inter-disciplinary, multi-institutional building's design reflects its. Anticipating LEED Platinum rating, the building incorporated sustainable construction practices, including div

Chapman, Michael S.

437

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

E-Print Network [OSTI]

Early direct steam generation prototypes include two central tower projects: a solar-powered enhanced oil recovery project called STEOR in the early 1980s (Romero 2002), and a solar tower projectPressure drops for direct steam generation in line-focus solar thermal systems John Pye1 , Graham

438

The Tower Shielding Facility: Its glorious past  

SciTech Connect (OSTI)

The Tower Shielding Facility (TSF) is the only reactor facility in the US that was designed and built for radiation-shielding studies in which both the reactor source and shield samples could be raised into the air to allow measurements to be made without interference from ground scattering or other spurious effects. The TSF proved its usefulness as many different programs were successfully completed. It became active in work for the Defense Atomic Support Agency (DASA) Space Nuclear Auxiliary Power, Defense Nuclear Agency, Liquid Metal Fast Breeder Reactor Program, the Gas-Cooled and High-Temperature Gas-Cooled Reactor programs, and the Japanese-American Shielding Program of Experimental Research, just to mention a few of the more extensive ones. The history of the TSF as presented in this report describes the various experiments that were performed using the different reactors. The experiments are categorized as to the programs which they supported and placed in corresponding chapters. The experiments are described in modest detail, along with their purpose when appropriate. Discussion of the results is minimal, but references are given to more extensive topical reports.

Muckenthaler, F.J.

1997-05-07T23:59:59.000Z

439

Underground-Energy-Storage Program, 1982 annual report  

SciTech Connect (OSTI)

Two principal underground energy storage technologies are discussed--Seasonal Thermal Energy Storage (STES) and Compressed Air Energy Storage (CAES). The Underground Energy Storage Program objectives, approach, structure, and milestones are described, and technical activities and progress in the STES and CAES areas are summarized. STES activities include aquifer thermal energy storage technology studies and STES technology assessment and development. CAES activities include reservoir stability studies and second-generation concepts studies. (LEW)

Kannberg, L.D.

1983-06-01T23:59:59.000Z

440

Underground Energy Storage Program. 1983 annual summary  

SciTech Connect (OSTI)

The Underground Energy Storage Program approach, structure, history, and milestones are described. Technical activities and progress in the Seasonal Thermal Energy Storage and Compressed Air Energy Storage components of the program are then summarized, documenting the work performed and progress made toward resolving and eliminating technical and economic barriers associated with those technologies. (LEW)

Kannberg, L.D.

1984-06-01T23:59:59.000Z

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

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

E-Print Network [OSTI]

materials (PCM) in solar thermal concentrating technologyeffective and efficient solar thermal electricity generatorbeen considered for solar thermal energy storages. These are

Roshandell, Melina

2013-01-01T23:59:59.000Z

442

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

443

Evaluating Equipment Performance Using SCADA/PMS Data for Thermal Utility Plants - Case Studies  

E-Print Network [OSTI]

The equipment in cogeneration plants and thermal energy plants such as gas tubing generators, boilers, steam turbine generators, chillers and cooling towers are often critical to satisfying building needs. Their actual energy performance is very...

Deng, X.; Chen, Q.; Xu, C.

2007-01-01T23:59:59.000Z

444

Evaluation of Effect of Fuel Assembly Loading Patterns on Thermal and Shielding Performance of a Spent Fuel Storage/Transportation Cask  

SciTech Connect (OSTI)

The licensing of spent fuel storage casks is generally based on conservative analyses that assume a storage system being uniformly loaded with design basis fuel. The design basis fuel typically assumes a maximum assembly enrichment, maximum burn up, and minimum cooling time. These conditions set the maximum decay heat loads and radioactive source terms for the design. Recognizing that reactor spent fuel pools hold spent fuel with an array of initial enrichments, burners, and cooling times, this study was performed to evaluate the effect of load pattern on peak cladding temperature and cask surface dose rate. Based on the analysis, the authors concluded that load patterns could be used to reduce peak cladding temperatures in a cask without adversely impacting the surface dose rates.

Cuta, Judith M.; Jenquin, Urban P.; McKinnon, Mikal A.

2001-11-20T23:59:59.000Z

445

Conceptual design selection and development of a latent-heat thermal-energy-storage subsystem for a saturated-steam solar receiver and load  

SciTech Connect (OSTI)

The following latent heat storage concepts are described and evaluated in comparison with each other and with an oil/rock sensible heat storage system: (1) passive tube intensive (shell-and-tube heat exchanger) with and without heat transfer enhanced by fins; (2) phase change material cans (or chubbs) with a biphenyl intermediate heat transfer fluid; (3) phase change material macroencapsulation in a containment tank full of tubes; (4) microencapsulation in a porous carrier; (5) direct contact heat exchange; and (6) systems using mechanical scrapers for removing solidified phase change material from container surfaces. A tube intensive system with heat transfer enhancement was selected, and the conceptual design and cost/performance estimates are given for it. A commercial scale unit is assessed, and design changes and corresponding costs are presented that would be required to make the system meet changed requirements. (LEW)

Not Available

1981-02-01T23:59:59.000Z

446

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...

447

Automatically controlled wind propeller and tower shadow eliminator  

SciTech Connect (OSTI)

A propeller hub carries pivotally-mounted blades that are linked to a spring-loaded collar on the propeller shaft for automatic coning and feathering under predetermined high velocity movement along the propeller shaft to change the blade pitch angle during low wind velocity conditions. An airfoil support mounts a propeller shaft and turns therewith to reduce tower shadow effects. This is called a ''down-wind system'' meaning the propeller is behind the tower and causes the assembly to rotate into the wind without a tail vane.

Randolph, A.J.

1982-01-12T23:59:59.000Z

448

Solar Two: A successful power tower demonstration project  

SciTech Connect (OSTI)

Solar Two, a 10MWe power tower plant in Barstow, California, successfully demonstrated the production of grid electricity at utility-scale with a molten-salt solar power tower. This paper provides an overview of the project, from inception in 1993 to closure in the spring of 1999. Included are discussions of the goals of the Solar Two consortium, the planned-vs.-actual timeline, plant performance, problems encountered, and highlights and successes of the project. The paper concludes with a number of key results of the Solar Two test and evaluation program.

REILLY,HUGH E.; PACHECO,JAMES E.

2000-03-02T23:59:59.000Z

449

Energy Storage  

ScienceCinema (OSTI)

ORNL Distinguished Scientist Parans Paranthaman is discovering new materials with potential for greatly increasing batteries' energy storage capacity and bring manufacturing back to the US.

Paranthaman, Parans

2014-06-23T23:59:59.000Z

450

Energy Storage  

SciTech Connect (OSTI)

ORNL Distinguished Scientist Parans Paranthaman is discovering new materials with potential for greatly increasing batteries' energy storage capacity and bring manufacturing back to the US.

Paranthaman, Parans

2014-06-03T23:59:59.000Z

451

The Safe Storage Study for Autocatalytic Reactive Chemicals  

E-Print Network [OSTI]

In the U.S. Chemical Safety and Hazard Investigation Board (CSB) report, Improving Reactive Hazard Management, there are 37 out of 167 accidents, which occurred in a storage tank or a storage area. This fact demonstrates that thermal runaway...

Liu, Lijun

2010-10-12T23:59:59.000Z

452

Solar Two: A Molten Salt Power Tower Demonstration* Craig E.Tyner  

E-Print Network [OSTI]

.S. Department of Energy (DOE),Sandia National Laboratories, and industry to convert the 10-MwSolar One Power 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 convertedplant, called SolarTwo, will reduce

Laughlin, Robert B.

453

THE TOWER FOUNDATION OF SAN JOSE STATE UNIVERSITY Procurement Card Application  

E-Print Network [OSTI]

THE TOWER FOUNDATION OF SAN JOSE STATE UNIVERSITY Procurement Card Application CARDHOLDER card is lost or stolen, I will notify the Tower Foundation immediately. I will surrender my Procurement Card to Tower Foundation upon termination of employment or upon reallocation of duties which do

Eirinaki, Magdalini

454

Ilchmann, Achim; Pahl, M. : Adaptive Multivariable pH Regulation of a Biogas Tower Reactor  

E-Print Network [OSTI]

Ilchmann, Achim; Pahl, M. : Adaptive Multivariable pH Regulation of a Biogas Tower Reactor Zuerst. The adaptive controller was successlullytesteclover il pcriod of tu'o nonths at a biogas tower reuetoriu pilot are not applicable to the biogas tower reüctor.since a dontinatingf-eatureof the new reactol' prir-rciplc-is its

Knobloch,Jürgen

455

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.

456

The Postnikov tower in motivic stable homotopy theory  

E-Print Network [OSTI]

's slice tower #12;Categories of spaces Fix a field k (perfect?). · Spc := the category of simplicial sets: "spaces". · Spc(k) := the category of presheaves of spaces on Sm/k: "spaces over k". · Pointed versions Spc, Spc(k). Spc Spc(k): S "constant presheaf" S. Sm/k Spc(k): X "representable presheaf" Y Hom

457

TOWER FOUNDATION OF SJSU VENDOR/CONSULTANT DATA FORM  

E-Print Network [OSTI]

TOWER FOUNDATION OF SJSU VENDOR/CONSULTANT DATA FORM ONE WASHINGTON SQUARE, SAN JOSE, CA 95192. Vendor/Consultant Name: Mailing Address: City, State, Zip Code: Telephone Number: Email Address: Vendor or an employee of SJSU. Vendor's Taxpayer I.D. Number ­ NOTE: Payment will not be processed without

Eirinaki, Magdalini

458

800mm luxury : pencil tower phenomenon in Hong Kong, China  

E-Print Network [OSTI]

150m2 - 40m2 - 60m3. Pencil Towers are slender pencil-like apartment buildings. They are commonly found in high-dense Asian cities such as Hong Kong, Tokyo and Singapore. Focusing on Hong Kong as the context of research, ...

Yam, Hiu Lan

2012-01-01T23:59:59.000Z

459

Multi-cell storage battery  

DOE Patents [OSTI]

A multi-cell storage battery, in particular to a lithium storage battery, which contains a temperature control device and in which groups of one or more individual cells arranged alongside one another are separated from one another by a thermally insulating solid layer whose coefficient of thermal conductivity lies between 0.01 and 0.2 W/(m*K), the thermal resistance of the solid layer being greater by at least a factor .lambda. than the thermal resistance of the individual cell. The individual cell is connected, at least in a region free of insulating material, to a heat exchanger, the thermal resistance of the heat exchanger in the direction toward the neighboring cell being selected to be greater by at least a factor .lambda. than the thermal resistance of the individual cell and, in addition, the thermal resistance of the heat exchanger toward the temperature control medium being selected to be smaller by at least a factor of about 10 than the thermal resistance of the individual cell, and .lambda. being the ratio of the energy content of the individual cell to the amount of energy that is needed to trigger a thermally induced cell failure at a defined upper operating temperature limit.

Brohm, Thomas (Hattersheim, DE); Bottcher, Friedhelm (Kelkheim, DE)

2000-01-01T23:59:59.000Z

460

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

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

Methods of forming thermal management systems and thermal management methods  

DOE Patents [OSTI]

A thermal management system for a vehicle includes a heat exchanger having a thermal energy storage material provided therein, a first coolant loop thermally coupled to an electrochemical storage device located within the first coolant loop and to the heat exchanger, and a second coolant loop thermally coupled to the heat exchanger. The first and second coolant loops are configured to carry distinct thermal energy transfer media. The thermal management system also includes an interface configured to facilitate transfer of heat generated by an internal combustion engine to the heat exchanger via the second coolant loop in order to selectively deliver the heat to the electrochemical storage device. Thermal management methods are also provided.

Gering, Kevin L.; Haefner, Daryl R.

2012-06-05T23:59:59.000Z

462

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

463

Hydrogen storage and integrated fuel cell assembly  

DOE Patents [OSTI]

Hydrogen is stored in materials that absorb and desorb hydrogen with temperature dependent rates. A housing is provided that allows for the storage of one or more types of hydrogen-storage materials in close thermal proximity to a fuel cell stack. This arrangement, which includes alternating fuel cell stack and hydrogen-storage units, allows for close thermal matching of the hydrogen storage material and the fuel cell stack. Also, the present invention allows for tailoring of the hydrogen delivery by mixing different materials in one unit. Thermal insulation alternatively allows for a highly efficient unit. Individual power modules including one fuel cell stack surrounded by a pair of hydrogen-storage units allows for distribution of power throughout a vehicle or other electric power consuming devices.

Gross, Karl J. (Fremont, CA)

2010-08-24T23:59:59.000Z

464

Thermal management systems and methods  

DOE Patents [OSTI]

A thermal management system for a vehicle includes a heat exchanger having a thermal energy storage material provided therein, a first coolant loop thermally coupled to an electrochemical storage device located within the first coolant loop and to the heat exchanger, and a second coolant loop thermally coupled to the heat exchanger. The first and second coolant loops are configured to carry distinct thermal energy transfer media. The thermal management system also includes an interface configured to facilitate transfer of heat generated by an internal combustion engine to the heat exchanger via the second coolant loop in order to selectively deliver the heat to the electrochemical storage device. Thermal management methods are also provided.

Gering, Kevin L.; Haefner, Daryl R.

2006-12-12T23:59:59.000Z

465

Hydrogen Storage  

Fuel Cell Technologies Publication and Product Library (EERE)

This 2-page fact sheet provides a brief introduction to hydrogen storage technologies. Intended for a non-technical audience, it explains the different ways in which hydrogen can be stored, as well a

466

Nanostructured Materials for Energy Generation and Storage  

E-Print Network [OSTI]

efficiency of the thermoelectric energy generation and battery storageefficiency of the thermoelectric energy generation and battery storagebattery electrodes suggest that the use of nanostructured materials can substantially improve the thermal management of the batteries and their energy storage efficiency.

Khan, Javed Miller

2012-01-01T23:59:59.000Z

467

Economical Energy Storage Option Enhances Energy Purchasing Strategies  

E-Print Network [OSTI]

Chilled Water Thermal Energy Storage (TES) offers benefits to both the electricity supplier and the electricity user. This well-established technology uses stratified chilled water to store energy in thermal form so that electricity can be purchased...

Hansen, D. W.; Winters, P. J.

468

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

E-Print Network [OSTI]

Thermal energy storage for sustainable energy consumption –Sustainable Energy, Cambridge University Press, 65- Dermott A.M, Frysinger G.R, Storage

Roshandell, Melina

2013-01-01T23:59:59.000Z

469

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

E-Print Network [OSTI]

Storage of Solar Thermal Energy,” Solar Energy, 18 (3), pp.Power Plants,” Journal of Solar Energy Engineering, 124 (2),Cycle Storage of Solar Energy,” Energy & Environmental

Coso, Dusan

2013-01-01T23:59:59.000Z

470

A study of a cooling tower with variable packing geometries  

E-Print Network [OSTI]

/deck pex' sq. ft. of tower ground Surface area (sq. ft. )s per deck~ pez sq, ft. of towex' gz ound area, 0, 298 0, 181 0. 113 2, 26 1. 21 0 ' 86 0, 298 0 ' 306 0, 316 The experimenter observed the following ma)or things with those thxee.../section 2. 28 Height of each section, ft. 3 Hoard foot of mater1al/deck per st ft. of tower ground area 0. 302 0. 1940 0. 0432 1. 26 0, 956 6 6 3 3 Number of sections tested 1, 2 k 3 1~ 2 d 3 1, 2 d 3 eTriangular type tested with vertex down . /In...

Azad, Abul Kalam

1957-01-01T23:59:59.000Z

471

Cooling Tower Energy Conservation Through Hydraulic Fan Drives  

E-Print Network [OSTI]

Fan Drive Eliminates These Problems from the Drive Train. The electric motor is at ground level; close coupled to a hydraulic pump, filters and oil reservoir. Hydraulic lines bring oil flow to the lightweight hydraulic motor mounted at the fan... Tower Fan Drives Are Many: It removes the hazard of costly fan wrecks and shaft coupling breakage. It eliminates gearbox maintenance, breakdown or replacement. The electric motor is mounted with the reservoir and pump at ground level for ease...

Dickerson, J.

472

Energy (Cost) Savings by Zero Discharge in Cooling Towers  

E-Print Network [OSTI]

. Relatively clean water may be added directly to the cooling tower basin (see Figure n. Reuse streams containing high suspended solids but of otherwise acceptable quality may be input just before the filters ~n the J The remainingireuse The flowrate..., silica, phos phates, and suspended solids. Other potential foulants and scale-forming species must be controlled by inhibitors or removed by an additional process in the sidestream treatment. Waste streams with scaling and corrosion potential before...

Matson, J. V.; Gardiner, W. M.; Harris, T. G.; Puckorius, P. R.

1982-01-01T23:59:59.000Z

473

Heat storage with CREDA  

SciTech Connect (OSTI)

The principle of operation of ETS or Electric Thermal Storage is discussed in this book. As can be seen by the diagram presented, heating elements buried deep within the core are energized during off-peak periods or periods of lower cost energy. These elements charge the core to a per-determined level, then during the on-peak periods when the cost of electricity is higher or demand is higher, the heat is extracted from the core. The author discusses how this technology has progressed to the ETS equipment of today; this being the finer control of charging rates and extraction of heat from the core.

Beal, T. (Fostoria Industries, Fostoria, OH (US))

1987-01-01T23:59:59.000Z

474

Thermal storage studies for solar heating and cooling: applications using chemical heat pumps. Final report, September 15, 1979-April 15, 1980  

SciTech Connect (OSTI)

TRNSYS-compatible subroutines for the simulation of chemical heat pumps have been written, and simulations (including heating, cooling, and domestic hot water) have been performed for Washington, DC and Ft. Worth, Texas. Direct weekly comparisons of the H/sub 2/SO/sub 4//H/sub 2/O and CaCl/sub 2//CH/sub 3/OH cycles have been carried out. Projected performance of the NH/sub 4/NO/sub 3//NH/sub 3/ cycle has also been investigated, and found to be essentially identical to H/sub 2/SO/sub 4//H/sub 2/O. In all cases simulated, the solar collector is a fixed evacuated tube system, which is necessary because chemical heat pumps operate at higher solar collector temperatures (> 100/sup 0/C) than conventional solar systems. With standard residential loads, the chemical heat pumps performed surprisingly well. In the Ft. Worth climate, less than 45 m/sup 2/ of collectors were required to meet over 90% of the heating and cooling loads. In Washington, DC, the area required to meet the cooling load was smaller (as little as 20 m/sup 2/, depending on window shading), but was sufficient to meet only 50 to 60% of the heating load. However, gas-fired backup via the heat pump was quite effective in reducing fossil fuel consumption: the thermal COPs in the heating mode were in the range 1.6 to 1.7. Since chemical heat pumps are designed to reject heat at relatively high temperatures, they were also effective in providing domestic hot water, supplying ca. 70% of the DHW in summer, ca. 50% in winter, and nearly 100% in spring and fall.

Offenhartz, P O.D.

1981-04-01T23:59:59.000Z

475

SUPERCONDUCTING MAGNETIC ENERGY STORAGE  

E-Print Network [OSTI]

Superconducting 30-MJ Energy Storage Coil", Proc. 19 80 ASC,Superconducting Magnetic Energy Storage Plant", IEEE Trans.SlIperconducting Magnetic Energy Storage Unit", in Advances

Hassenzahl, W.

2011-01-01T23:59:59.000Z

476

HEITSCH, R OMISCH --HYDRO-STORAGE SUBPROBLEMS IN POWER GENERATION 1 Hydro-Storage Subproblems in Power Generation  

E-Print Network [OSTI]

HEITSCH, R ¨OMISCH -- HYDRO-STORAGE SUBPROBLEMS IN POWER GENERATION 1 Hydro-Storage Subproblems that owns a hydro-thermal generation sys- tem and trades on the power market often lead to complex stochas- tic optimization problems. We present a new approach to solving stochastic hydro-storage subproblems

Römisch, Werner

477

Department of Mechanical Engineering Spring 2013 Green Towers Vertical Aquaponic Microfarm  

E-Print Network [OSTI]

PENNSTATE Department of Mechanical Engineering Spring 2013 Green Towers Vertical Aquaponic gardens" inside of vertically placed, twenty-foot tall shipping containers. The gardens utilize aquaponic

Demirel, Melik C.

478

At 200 feet tall, the Tower at Sandia National Laboratories  

E-Print Network [OSTI]

components and systems in proposed solar thermal electrical plants planned for large-scale power generation for a variety of activities, including: · Nuclear thermal flash simulation. · Thermal performance testingkW thermal power and peak fluxes up to 1500 W/cm2. They are individually controlled to track to sun

479

Performance characteristics of an induced draft, counterflow, spray cooling tower  

E-Print Network [OSTI]

V Total mass transfer coefi'icient, pounds of water per hour per square Zoot per pound of vapor per pound of dry air Tower characteristic Number of nozzles used XX SURVEY OF LXTERATUHE The currently accepted theory of heat and mass exchange between... a stream of' water droplets and a stream of unsatu rated air was first proposed by Robinson (8)o in 1MS, and, ln 19S5$ by Waker g Lewi s y and 5!cAdams ( 1 ) . Al so in 1985, -gerlrel (5), using the same basic equations somewhat moxe rigorously...

Jones, Charles Edward

2012-06-07T23:59:59.000Z

480

Broadwind Energy Formerly Tower Tech Holdings | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBoston Area SolarConnecticut:659243°Broadwind Energy Formerly Tower Tech

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

DEMONSTRATION OF ENERGY STORAGE INTEGRATED WITH A SOLAR DISH FIELD IN WHYALLA  

E-Print Network [OSTI]

energy storage into the thermal cycle is a key point of differentiation between solar thermalDEMONSTRATION OF ENERGY STORAGE INTEGRATED WITH A SOLAR DISH FIELD IN WHYALLA Joe Coventry 1-of-a-kind demonstration of an integrated solar dish and molten- salt storage system, using the superheated steam energy

482

NUMERICAL ANALYSIS OF VENTILATION TEMPERATURES REGULATION BY ENERGY STORAGE IN PHASE CHANGE  

E-Print Network [OSTI]

NUMERICAL ANALYSIS OF VENTILATION TEMPERATURES REGULATION BY ENERGY STORAGE IN PHASE CHANGE, the use of thermal energy storage (TES) systems receives increasing interest. To allow high or low temperature thermal energy to be stored for later use, a heat or cool storage with PCM could be designed; Zhu

Paris-Sud XI, Université de

483

Camera-based reflectivity measurement for solar thermal applications  

E-Print Network [OSTI]

of the solar-weighted reflectivity of the receiver component in CSP systems. Such reflectivity measurement Tubular receivers for solar thermal power plants, specifically tower plants, are in common use, in plants to be able to do conveniently in the field, possibly at intervals throughout the life of the plant

484

Optimizing Cooling Tower Performance Refrigeration Systems, Chemical Plants, and Power Plants All Have A Resource Quietly Awaiting Exploitation-Cold Water!!  

E-Print Network [OSTI]

requirements before a cooling tower is purchased. This relates to the volume of circulating water, hot water temperature on the tower, cold water discharge, and wet bulb temperature (consisting of ambient temperature and relative humidity). After the tower...

Burger, R.

485

Coagulation chemistries for silica removal from cooling tower water.  

SciTech Connect (OSTI)

The formation of silica scale is a problem for thermoelectric power generating facilities, and this study investigated the potential for removal of silica by means of chemical coagulation from source water before it is subjected to mineral concentration in cooling towers. In Phase I, a screening of many typical as well as novel coagulants was carried out using concentrated cooling tower water, with and without flocculation aids, at concentrations typical for water purification with limited results. In Phase II, it was decided that treatment of source or make up water was more appropriate, and that higher dosing with coagulants delivered promising results. In fact, the less exotic coagulants proved to be more efficacious for reasons not yet fully determined. Some analysis was made of the molecular nature of the precipitated floc, which may aid in process improvements. In Phase III, more detailed study of process conditions for aluminum chloride coagulation was undertaken. Lime-soda water softening and the precipitation of magnesium hydroxide were shown to be too limited in terms of effectiveness, speed, and energy consumption to be considered further for the present application. In Phase IV, sodium aluminate emerged as an effective coagulant for silica, and the most attractive of those tested to date because of its availability, ease of use, and low requirement for additional chemicals. Some process optimization was performed for coagulant concentration and operational pH. It is concluded that silica coagulation with simple aluminum-based agents is effective, simple, and compatible with other industrial processes.

Nyman, May Devan; Altman, Susan Jeanne; Stewart, Tom

2010-02-01T23:59:59.000Z

486

Computer Simulation of Cooling Effect of Wind Tower on Passively Ventilated Building  

E-Print Network [OSTI]

Computer Simulation of Cooling Effect of Wind Tower on Passively Ventilated Building John Seryak Kelly Kissock Project Engineer Associate Professor Department of Mechanical and Aerospace Engineering... University of Dayton Dayton, Ohio ABSTRACT Traditional buildings are cooled and ventilated by mechanically induced drafts. Natural ventilation aspires to cool and ventilate a building by natural means, such as cross ventilation or wind towers...

Seryak, J.; Kissock, J. K.

2002-01-01T23:59:59.000Z

487

LQG control of horizontal wind turbines for blades and tower loads alleviation  

E-Print Network [OSTI]

LQG control of horizontal wind turbines for blades and tower loads alleviation A. Pintea*, N of power produced by two bladed horizontal variable speed wind turbines. The proposed controller ensures oscillations and with the tower bending tendency. Keywords: LQG control, Wind turbines, Multi-objective control

Paris-Sud XI, Université de

488

The Only Way is Up On A Tower of Abstractions for Biology  

E-Print Network [OSTI]

The Only Way is Up On A Tower of Abstractions for Biology Jasmin Fisher1 , Nir Piterman2 Abstract. We draw an analogy between biology and computer hard- ware systems and argue for the need that in reverse engineering of biological systems; only by using a tower of abstractions we would be able

Vardi, Moshe Y.

489

UT tower goes dark to conserve energy by KVUE.com  

E-Print Network [OSTI]

UT tower goes dark to conserve energy by KVUE.com Posted on November 22, 2013 at 5:12 PM Updated, but the first time the tower turned off its lights for the initiative. In previous initiatives, the UT Energy and Water Conservation (EWC) Program simply asked the campus community to turn off lights, computers

Johnston, Daniel

490

The Use of Tall Tower Field Data for Estimating Wind Turbine Power Performance , J. Chapman1  

E-Print Network [OSTI]

The Use of Tall Tower Field Data for Estimating Wind Turbine Power Performance A. Swift1 , J wind speed measurements on the TTU WISE 200m and 78m towers. A hypothetical wind turbine is shown. At potential wind turbine sites, it is uncommon to have wind measurements available at multiple heights. Then

Manuel, Lance

491

GreenCache: Augmenting Off-the-Grid Cellular Towers with Multimedia Caches  

E-Print Network [OSTI]

or commercial advantage and that copies bear this notice and the full citation on the first page. To copy to run cellular towers "off the grid" [4]. Today's "off the grid" cellu- lar towers operate off diesel with expensive and "dirty" diesel fuel. S

Shenoy, Prashant

492

Method and system for simulating heat and mass transfer in cooling towers  

DOE Patents [OSTI]

The present invention is a system and method for simulating the performance of a cooling tower. More precisely, the simulator of the present invention predicts values related to the heat and mass transfer from a liquid (e.g., water) to a gas (e.g., air) when provided with input data related to a cooling tower design. In particular, the simulator accepts input data regarding: (a) cooling tower site environmental characteristics; (b) cooling tower operational characteristics; and (c) geometric characteristics of the packing used to increase the surface area within the cooling tower upon which the heat and mass transfer interactions occur. In providing such performance predictions, the simulator performs computations related to the physics of heat and mass transfer within the packing. Thus, instead of relying solely on trial and error wherein various packing geometries are tested during construction of the cooling tower, the packing geometries for a proposed cooling tower can be simulated for use in selecting a desired packing geometry for the cooling tower.

Bharathan, Desikan (Lakewood, CO); Hassani, A. Vahab (Golden, CO)

1997-01-01T23:59:59.000Z

493

SHM BASED SYSTEM DESIGN OFA WIND TURBINE TOWER USING A MODAL SENSITIVITY BASED BAYES DETECTOR  

E-Print Network [OSTI]

SHM BASED SYSTEM DESIGN OFA WIND TURBINE TOWER USING A MODAL SENSITIVITY BASED BAYES DETECTOR Mads@ramboll.com ABSTRACT It is investigated if material based structural safety can be replaced with safety obtained from of the NREL 5MW wind turbine tower subjected to bending fatigue and horizontal circumferential cracking

Boyer, Edmond

494

Gas storage materials, including hydrogen storage materials  

DOE Patents [OSTI]

A material for the storage and release of gases comprises a plurality of hollow elements, each hollow element comprising a porous wall enclosing an interior cavity, the interior cavity including structures of a solid-state storage material. In particular examples, the storage material is a hydrogen storage material, such as a solid state hydride. An improved method for forming such materials includes the solution diffusion of a storage material solution through a porous wall of a hollow element into an interior cavity.

Mohtadi, Rana F; Wicks, George G; Heung, Leung K; Nakamura, Kenji

2014-11-25T23:59:59.000Z

495

Gas storage materials, including hydrogen storage materials  

DOE Patents [OSTI]

A material for the storage and release of gases comprises a plurality of hollow elements, each hollow element comprising a porous wall enclosing an interior cavity, the interior cavity including structures of a solid-state storage material. In particular examples, the storage material is a hydrogen storage material such as a solid state hydride. An improved method for forming such materials includes the solution diffusion of a storage material solution through a porous wall of a hollow element into an interior cavity.

Mohtadi, Rana F; Wicks, George G; Heung, Leung K; Nakamura, Kenji

2013-02-19T23:59:59.000Z

496

System and method for aligning heliostats of a solar power tower  

DOE Patents [OSTI]

Disclosed is a solar power tower heliostat alignment system and method that includes a solar power tower with a focal area, a plurality of heliostats that each reflect sunlight towards the focal area of the solar power tower, an off-focal area location substantially close to the focal area of the solar power tower, a communication link between the off-focal area location and a misaligned heliostat, and a processor that interprets the communication between the off-focal area location and the misaligned heliostat to identify the misaligned heliostat from the plurality of heliostats and that determines a correction for the identified misaligned heliostat to realign the misaligned heliostat to reflect sunlight towards the focal area of the solar power tower.

Convery, Mark R.

2013-01-01T23:59:59.000Z

497

Structural Design Considerations for Tubular Power Tower Receivers Operating at 650 Degrees C: Preprint  

SciTech Connect (OSTI)

Research of advanced power cycles has shown supercritical carbon dioxide power cycles may have thermal efficiency benefits relative to steam cycles at temperatures around 500 - 700 degrees C. To realize these benefits for CSP, it is necessary to increase the maximum outlet temperature of current tower designs. Research at NREL is investigating a concept that uses high-pressure supercritical carbon dioxide as the heat transfer fluid to achieve a 650 degrees C receiver outlet temperature. At these operating conditions, creep becomes an important factor in the design of a tubular receiver and contemporary design assumptions for both solar and traditional boiler applications must be revisited and revised. This paper discusses lessons learned for high-pressure, high-temperature tubular receiver design. An analysis of a simplified receiver tube is discussed, and the results show the limiting stress mechanisms in the tube and the impact on the maximum allowable flux as design parameters vary. Results of this preliminary analysis indicate an underlying trade-off between tube thickness and the maximum allowable flux on the tube. Future work will expand the scope of design variables considered and attempt to optimize the design based on cost and performance metrics.

Neises, T. W.; Wagner, M. J.; Gray, A. K.

2014-04-01T23:59:59.000Z

498

Advanced building skins : translucent thermal storage elements  

E-Print Network [OSTI]

Advances in the material sciences continue to provide designers with a wealth of new materials that challenge preconceived notions of the building envelope and its performance. These new technologies can be used to create ...

Kienzl, Nico, 1971-

1999-01-01T23:59:59.000Z

499

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

abandoned. The two-dimensional model gives a rotationally symmetrical approxima- tion to the reservoir.

Authors, Various

2011-01-01T23:59:59.000Z

500

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network [OSTI]

F. Meyer Walter Hausz General Electric Co. -TEMPO Center forUtilities, GE72TMP-56, General Electric Co. -TEMPO, Santaof the Interior; General Electric Co. -TEMPO, Santa Barbara,

Authors, Various

2011-01-01T23:59:59.000Z