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Número de publicaciónUS20110000213 A1
Tipo de publicaciónSolicitud
Número de solicitudUS 12/647,904
Fecha de publicación6 Ene 2011
Fecha de presentación28 Dic 2009
Fecha de prioridad27 May 2005
También publicado comoUS7640746, US20060266039
Número de publicación12647904, 647904, US 2011/0000213 A1, US 2011/000213 A1, US 20110000213 A1, US 20110000213A1, US 2011000213 A1, US 2011000213A1, US-A1-20110000213, US-A1-2011000213, US2011/0000213A1, US2011/000213A1, US20110000213 A1, US20110000213A1, US2011000213 A1, US2011000213A1
InventoresMark Joseph Skowronski, Ronald Farris Kincaid
Cesionario originalMarkron Technologies, Llc
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Method and system integrating solar heat into a regenerative rankine steam cycle
US 20110000213 A1
A method to integrate collected solar thermal energy into the feedwater system of a Rankine cycle power plant is disclosed. This novelty uses a closed loop, single phase fluid system to collect both the solar heat and to provide the heat input into the feedwater stream of a regenerative Rankine cycle. One embodiment of this method of integrating solar energy into a regenerative Rankine power plant cycle, such as a coal power plant, allows for automatic balancing of the steam extraction flows and does not change the temperature of the feedwater to the boiler. The concept, depending on the application, allows for the spare turbine capacity normally available in a coal plant to be used to produce incremental capacity and energy that is powered by solar thermal energy. By “piggybacking” on the available components and infrastructure of the host Rankine cycle power plant, considerable cost savings are achieved resulting in lower solar produced electricity costs.
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1. A method for generating power, the method comprising the steps of:
generating a heated circulating fluid through the use of solar thermal sensible heat in a closed loop, single phase system;
transferring energy from the solar heated fluid to the feedwater, using a feedwater heater in series with other feedwater heaters, of a host regenerative Rankine cycle power plant, wherein the transferred heat is used to augment or replace steam turbine extraction steam heating in one or more of the high pressure feedwater heaters (downstream of the boiler feed pump) of the host power plant.
2. The method of claim 1, wherein the solar heated fluid's temperature is controlled to optimize the feedwater temperature during varying capacity loads of the host plant's Rankine cycle to maximize the overall efficiency of the Rankine cycle.
3. The method of claim 1, wherein the solar heated fluid's flow is controlled to optimize the feedwater temperature during varying capacity loads of the host plant's Rankine cycle to maximize the overall efficiency of the Rankine cycle.
4. The method of claim 1, wherein the solar fluid heating of the feedwater that replaces or augments the host plant's steam turbine extraction steam heating of the feedwater utilizes the idle capacity in the host Rankine power plant's steam turbine and generator that exists to handle increased steam flow through the steam turbine when one or more feedwaters are valved out of the steam cycle while maintaining essentially the same fuel input into the Rankine cycle.
5. The method of claim 1, wherein the solar fluid heating of the feedwater that replaces or augments the host plant's steam turbine extraction steam heating of the feedwater allows the boiler operator to reduce the fuel flow to the boiler realizing a lower fuel consumption at the same capacity output by replacing fossil fuel with solar heat.
6. The method of claim 1, wherein the placement of the transferred solar heat into the host plant's feedwater stream is such that the subsequent steam turbine extraction flows to the downstream feedwater heaters in the host plant's Rankine regenerative cycle are automatically regulated through the modulation of the solar heated fluid resulting in essentially the same feedwater temperature discharge temperature to the boiler with or without solar heat input into the previous feedwater heaters.
7. The method of claim of 1, wherein the maximum amount of solar collected heat and full use of the concentrated solar collectors can be inputted into the host plant's feedwater through the use of automatic regulation of the host plant's extraction steam resulting from varying the solar heat input as delineated in claims 2 and 3.
8. The method of claim 1, wherein the transferring of energy from the solar heated fluid to the feedwater of a host regenerative Rankine cycle power plant comprises the steps of
transferring the energy from the solar heated, closed loop system to a second closed loop system circulating a second fluid;
transferring the energy from the second fluid in the second circulating closed loop system to the host plant's feedwater thereby eliminating any direct leakage of the solar heated fluid in the first circulating closed loop system into the host plant's feedwater stream.
9. The method of using a lower pressure solar heated transfer fluid in a single closed loop system to preclude, leakage into the higher pressure feedwater stream of the host plant's regenerative Rankine cycle.
10. The method of claim 1, wherein the use of solar heat storage is utilized to more effectively implement the processes described in claims 2 and 3.
11. The method of claim 10, wherein the transfer pipe carrying the solar heated fluid between the solar field and the regenerative Rankine cycle power plant is used as the primary storage mechanism to more effectively implement the processes described in claims 2 and 3.
12. The method to input variable solar heat input without the use of storage into a regenerative Rankine power plant cycle while maintaining constant heat input to the boiler and without altering the boiler fuel input.
  • [0001]
    This application claims the benefits of the U.S. Provisional Patent Application No. 60/684,845 entitled “Method To Integrate Solar Thermal With A Coal Fired Rankine Cycle” filed on May 27, 2005. This provisional application is incorporated by reference herein in its entirety.
  • [0002]
  • [0000]
    3,995,429 Rollins
    4,069,674 Warren
    4,192,144 Pierce
    4,613,409 Volland
    5,444,972 Moore
    5,727,379 Cohn
    5,806,317 Kohler, et al
    5,857,322 Cohn
    6,792,759 Rollins
    6,694,740 Nayar
  • [0000]
    • 12th SolarPACES Intern. Symposium, Mexico 2004 “Plug-In Strategy for Market Introduction of Fresnel Collectors”, Lurchenmuller et al
    • “Stanwell Solar Thermal Power Project” by Burbidge, et al
  • [0005]
    This invention pertains to the electric power generation field wherein large utility size power plants are used to generate the nation's electricity. The ever increasing cost of fossil fuels will not abate since fossil fuels have a finite limit and, as the finite quantity decreases with use, the growing demand for electricity will ultimately lead to significantly higher electricity costs. This invention utilizes the sun to provide supplemental heat into a conventional Rankine cycle. A major advantage of this novelty is that it “piggybacks” on the existing components and infrastructure of the new or existing Rankine cycle power plant. This piggybacking results in significant cost reduction since a solar boiler, solar feedwater train and solar steam turbine-generator are not needed; these components are supplied in the Rankine cycle instead and convert the solar supplied heat into electricity resulting in a significant reduction in the cost of solar produced electricity.
  • [0006]
    In addition, the novelty is particularly well suited to supply supplemental solar heat to a coal regenerative Rankine cycle since this type of coal plant often has surplus capacity in its steam turbine generator and associated equipment. This surplus capacity is normally installed since the valving out of a feedwater heater for maintenance or unexpected outage will result in a higher capacity steam flow through the steam turbine and the operators of the plant would then have the extra turbine capacity to handle the excess steam flow. By having this surplus capacity, the Rankine cycle can then produce greater amounts of generation. However, there is a detrimental impact on the heat rate (efficiency) when a feedwater heater is valved out. The novelty proposed herein supplements the heat input into the Rankine cycle such that this inefficiency is essentially eliminated. The type of novelty proposed herein is best suited for large scale Rankine cycle power plants that utilize regenerative feedwater stream and are typically in the 100 MW and greater size range.
  • [0007]
    The concept of integrating a solar thermal power plant into a fossil fuel power plant has previously been investigated; in these investigations, solar heat was used to preheat feedwater through evaporation of the feedwater or the feedwater is bifurcated resulting in a portion of the feedwater stream to be heated with extraction steam and the remaining feedwater stream heated by solar means. For example, Cohn U.S. Pat. No. 5,727,379 teaches that solar heat is used to evaporate the feedwater prior to boiler entrance. This method would then require an expensive solar boiler and is not applicable to a Rankine cycle using regenerative heating. Warren U.S. Pat. No. 4,069,674 teaches that the feedwater is bifurcated immediately at the condenser hotwell resulting in high temperature solar being used to heat relatively cold feedwater resulting in high entropic losses. Thermodynamically, it is always preferable to add heat at the highest possible temperature. In addition, current technology being explored uses solar heat to evaporate water into steam which is then used to directly provide energy to a feedwater heater. This type of technology results in complex and costly equipment when compared to the novelty proposed.
  • [0008]
    While all of these methods provide some sort of value addition, they all have certain thermodynamic restrictions and cost disadvantages. The following concept proposes a novelty that is more cost effective and energy efficient than any of the previously studied integration methods and poses less capital and less operational risk to the host regenerative steam cycle power plant. The concept can be used for new installations or can be easily retrofitted into existing regenerative Rankine power cycles such as coal plants. In particular, the southwest United States has numerous coal plants that are located in isolated areas that have high solar insolation that are prime candidates for solar thermal retrofit. This method may also be used for other fossil fueled (including natural gas) or nuclear fueled boiler scenarios and most other regenerative steam Rankine power cycles.
  • [0009]
    For purposes of illustration, this novelty is discussed herein as applied to a coal plant. Nearly all large coal plants use both reheat and regeneration to achieve high cycle efficiency. Reheat can be defined as returning steam, which has been partially expanded in the turbine, back to the boiler for additional heating prior to continued expansion in the turbine. Regeneration is a method to limit condenser loss in a Rankine cycle by taking partially expanded steam (extracted from the steam turbine) and using it to pre-heat the feedwater prior to additional heating and vaporization in the boiler. By pre-heating the feedwater, less heat energy is needed in the boiler to produce steam and, since the partially expanded steam is condensed using feedwater as the “heat sink”, less heat is rejected to the condenser. Regeneration can be accomplished using either “open” or “closed” feedwater heaters. In the “open” feedwater heater, the extracted steam from the turbine is mixed directly with the feedwater; in the “closed” feedwater heater, the extraction steam is not mixed with the feedwater but uses both sensible and latent heat in normally a tube and shell feedwater heater to boost the feedwater temperature.
  • [0010]
    This novelty achieves lower solar power electricity costs by utilizing the existing power plant components and infrastructure, primarily the turbine and generator of the Rankine cycle power plant. A solar boiler is also not necessary since all solar heat is directly transferred to the Rankine cycle via a common fluid that is used for both solar heat collection and heating the feedwater stream in the Rankine cycle.
  • [0011]
    The proposed concept uses a “closed” feedwater heater system to heat the feedwater directly with collected solar thermal energy and without the additional steam conversion process typically found in other studied solar Rankine integration methods. A common single phase heat transfer fluid is used in a sensible heat transfer process to both collect the solar heat energy and to add heat into the feedwater stream of the coal plant thus supplanting a portion of the turbine extraction steam used to pre-heat the feedwater. The additional feedwater heater which is heated with solar energy is added either serially or in parallel to the conventional feedwater heaters that use extraction steam to heat the feedwater. In this manner, the extracted steam from the turbine is reduced but the boiler still receives the feedwater at the same temperature as before. Accordingly, the amount of turbine output is increased because more steam is now directed through the turbine and the overall efficiency remains high because there is no degradation in the feedwater temperature. Typically, there are sufficient margins in the turbine generator of a coal regenerative steam cycle to allow an increase in capacity output resulting from an increase in steam flow through the turbine; typically these margins are in the order of 5% to 10% of additional generating capacity which would then be available to provide the additional generation when the Rankine cycle is augmented with solar heat. This increase in steam turbine flow would result from the reduction in extraction steam flows since solar heat is now replacing a portion of the extracted steam used for feedwater heating. Consequently, the direct heating of the feedwater through solar thermal energy will allow an increase in turbine output in new facilities where the extra steam turbine capacity is designed into the plant or at existing facilities where there are additional margins in the steam turbine. In existing facilities where there is no spare capacity in the steam turbine, the solar heat will still displace fossil fuel.
  • [0012]
    The proposed novelty can be used to input solar heat in an added feedwater heater that is located downstream of the last feedwater heater (in a retrofit application) and have the potential, if so desired by the coal plant operators, to increase the feedwater temperature to the boiler (typically, this is the economizer section of the boiler). Alternately, the solar heat input can be made through a feedwater heater that is added in between two feedwater heaters that are heated with extraction steam. In this embodiment, the solar heat input into the feedwater stream can be varied by temperature and flow and, accordingly, the steam extraction heaters downstream of the solar feedwater heater will auto adjust to maintain the design feedwater temperature. This is achieved by the extraction steam flow auto adjusting based on the operating pressure and temperature of the feedwater heater.
  • [0013]
    Given the second law of thermodynamics, it is always beneficial to heat a working fluid at the highest possible temperature. Consequently it proposed that mainly the 1st point heater be the primary source for supplemental solar heat; the 1st point heater (last heater in the feedwater train) is operated at the highest pressure and is used to achieve heat addition to the feedwater at the highest temperature. The solar added feedwater heater can be placed either upstream or downstream of the 1st point heater. If downstream, then the novelty has the ability to adjust the temperature of the feedwater that is directed to the boiler (economizer). If upstream, then the novelty can input variable solar heat resulting in the auto adjust of the extraction steam for all heaters downstream of the solar heater. For additional turbine capacity increase or to offset fossil fuel consumption, additional heaters could be used, however, this novelty proposes the solar direct heating of feedwater that is downstream of the boiler feed pump in order to maintain high efficiency.
  • [0014]
    It is noted that all of the feedwater heating in the proposed concept is provided by solar sensible heat. Accordingly, there is higher solar system efficiency since no heat of evaporation (latent heat) is solar provided; this allows heat transfer with smaller temperature differences than otherwise would be realized if the solar heat was used for evaporation also. The heat of evaporation for the Rankine cycle occurs in the fossil fueled boiler and, consequently, entropic losses associated with this flashing are already accounted for in the fossil fueled Rankine cycle. The use of solar provided sensible heat to an existing Rankine cycle is an advantage compared to a solar cycle which must provide its own latent heat for flashing.
  • [0015]
    FIG. 1 shows the embodiment that has the solar added feedwater heater downstream of the last extraction steam feedwater heater (at the end of the regenerative feedwater train); in this embodiment, the feedwater temperature into the boiler can be varied.
  • [0016]
    FIG. 2 shows the embodiment that has the solar added feedwater heater upstream of the last extraction steam feedwater heater; in this embodiment, the solar heat input, through control of the solar heat collection fluid flow and temperature, can be varied.
  • [0017]
    Referring to FIG. 1, solar heat is collected with trough technology or other suitable solar concentrating heat collection devices. Using the solar trough technology (which can be substituted with other high temperature solar heating devices), the sun's energy is “line” focused on a Heat Collection Element (HCE). The HCE is essentially a specially designed pipe that contains a fluid suitable for the collection of high temperature heat. Once the sun's energy has been focused and concentrated on the HCE, the energy is collected in the high temperature collection fluid 4 that is typically special oil designed to withstand high temperatures. Current technology limits this temperature to about 730-750 F. The hot oil is then pumped into a Hot Oil Storage (optional) that would provide both storage for extended operation or storage that would allow for higher outputs of thermal energy for shorter durations. The Hot Oil Storage also provides a buffer to smooth out heat spikes and heat loss from the solar collectors. Once the heat has been delivered to the storage or to the feedwater train of the steam Rankine cycle, the oil 5 is then returned to the solar collector for reheating. The storage system can consist of a single tank using thermocline storage technology or also consist of two tanks; one specially designated for “hot” oil and the other specially designated for “cold” oil in order to ensure even flow delivery to the solar collector field. The hot oil storage may also be designed through additional length and oversized transfer piping to the solar feedwater heater. In this manner, the amount of heat transfer fluid in the pipeline provides the necessary storage.
  • [0018]
    The hot oil 6 fed from the Hot Oil Storage Tank is then directed to a new feedwater heater X that provides heat in addition to or in substitution for the heat provided by the steam extraction 8 to the upstream heater. Typically, the hot oil would be on the “shell side” of the feedwater heater X and the feedwater, because it would be at a much higher pressure, would be on the “tube side” of the feedwater heater. It is anticipated that most retrofit applications would consist of substituting heat provided by the hot oil 6 for the high pressure extraction steam 8. In this manner, design operating parameters of the economizer is maintained and additional generating capacity may be realized since more steam would then be available to expand through the Steam Turbine. The cooled oil 7 is then returned to storage and eventually cold oil 5 is returned to the solar loop for reheating.
  • [0019]
    As noted in FIG. 1, the proposed additional new oil feedwater heater X would be installed in series with the existing feedwater train is the novelty is applied to an existing plant (typical heater train shown in FIG. 1 are designated as heaters a, b, c, d, and e) which is used in typical Rankine cycles to preheat the condensate 1 and feedwater 2 (note: for simplicity, the boiler feed pump is not shown) prior to entry to the boiler economizer. When there is no heated oil 4 provided by the solar collector and when there is no storage hot oil 5, the feedwater would merely pass through the feedwater heater X having already been pre-heated with the conventional feedwater train with the only penalty being a small feedwater pressure drop through the added solar heater X. Valve 10 would then be valved open to allow steam extraction 8 from the turbine and another valve 12 would allow drips 9 to flow to the next lower pressure heater. When solar heat is available, the hot oil 4, 6 would then be pumped to the heater and the valving reversed to restrict the extraction steam flow to the existing heater and to restrict the drip flow 9 to the next lower pressure heater. Valving 11, 13 would allow safe operation of the solar hot oil supply system. Alternately, the new feedwater heater could be installed in parallel with the existing heater(s) with appropriate valving for when the heater is in use and when it is not. It should be noted that the additional new oil feedwater heater X could also be easily installed in parallel with the feedwater train to achieve the same effects (not shown).
  • [0020]
    Although the concept can be applied to existing coal Rankine systems, if applied to new systems, the boiler could then be designed to receive higher feedwater temperatures heated by supplemental solar heat. In this manner, efficiencies more closely resembling Carnot efficiencies would be achieved since the feedwater temperature would be closer to the feedwater's saturation temperature. In addition, higher turbine capability would also be achieved since extraction steam would be further reduced permitting higher turbine flows and resulting higher outputs.
  • [0021]
    In FIG. 2 the same process is shown as is illustrated in FIG. 1 with the exception that the solar heat is supplied to a feedwater heater that is upstream of the 1st point (high pressure) feedwater heater. In this manner, the solar heat into the feedwater stream can be varied by the control of the solar heating fluid's temperature and flow. The downstream feedwater heater, which is heated with extraction steam, from the solar feedwater heater X will automatically adjust the extraction steam flow based on the design temperature and pressure of the feedwater stream and the design temperature and pressure of the extraction steam flow.
  • [0022]
    This phenomenon results since the feedwater heater will condense that amount of pressurized steam based on the incoming temperature of the feedwater. As the temperature of the feedwater stream increases due to solar heating then the extraction steam will automatically diminish to compensate. In this manner, the total amount of solar heat that can be collected on days when the solar insolation may exceed the design can be utilized in an efficient manner. It is uneconomic to design the solar collection system to collect all possible solar insolation since it makes little economic sense to design the system when the full system may only operate, say, 3% or 4% of the time. However, this novelty allows all solar heat collected to be used and useful. No solar heat is ever lost due to the lack of capacity to process and use the solar heat. The auto adjust mechanism of the novelty compensates for any excess solar insolation that may be collected. In addition, this novelty also allows the Rankine cycle to automatically compensate for any modulation of the solar heat input.
Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US3995429 *14 Jul 19757 Dic 1976Walter Todd PetersApparatus for generating power using environmental temperature differentials
US4055948 *8 Dic 19751 Nov 1977Kraus Robert ASolar thermal-radiation, absorption and conversion system
US4060990 *19 Feb 19766 Dic 1977Foster Wheeler Energy CorporationPower generation system
US4069674 *14 Ene 197724 Ene 1978Warren Glenn BPower plant
US4091622 *29 Nov 197630 May 1978Marchesi Carlo MCombined day and night solar energy system
US4164123 *25 Ago 197614 Ago 1979Smith Otto J MSolar thermal electric power plant
US4189922 *8 Mar 197826 Feb 1980Snamprogetti S.P.A.Converting solar energy into electric power
US4192144 *3 Ago 197811 Mar 1980Westinghouse Electric Corp.Direct contact heat exchanger with phase change of working fluid
US4358929 *28 Abr 198016 Nov 1982Stephen MolivadasSolar power system
US4509333 *15 Abr 19839 Abr 1985Sanders Associates, Inc.Brayton engine burner
US4613409 *19 Ago 198523 Sep 1986Volland Craig SHigh rate solar still and process
US4619809 *30 Mar 198328 Oct 1986The Babcock & Wilcox CompanySteam generation and reheat apparatus
US4765142 *12 May 198723 Ago 1988Gibbs & Hill, Inc.Compressed air energy storage turbomachinery cycle with compression heat recovery, storage, steam generation and utilization during power generation
US4942736 *19 Sep 198824 Jul 1990Ormat Inc.Method of and apparatus for producing power from solar energy
US5109665 *11 Oct 19895 May 1992Hitachi, Ltd.Waste heat recovery boiler system
US5417052 *5 Nov 199323 May 1995Midwest Research InstituteHybrid solar central receiver for combined cycle power plant
US5444972 *12 Abr 199429 Ago 1995Rockwell International CorporationSolar-gas combined cycle electrical generating system
US5471832 *9 Mar 19945 Dic 1995Hitachi, Ltd.Combined cycle power plant
US5628183 *12 Oct 199413 May 1997Rice; Ivan G.Split stream boiler for combined cycle power plants
US5647199 *12 Sep 199515 Jul 1997General Electric Co.Combined-cycle with multi-pressure reheat system
US5727379 *31 May 199617 Mar 1998Electric Power Research InstituteHybid solar and fuel fired electrical generating system
US5806317 *17 Sep 199615 Sep 1998Siemens AktiengesellschaftMethod and device for solar steam generation
US5857322 *30 Sep 199712 Ene 1999Electric Power Research Institute, Inc.Hybrid solar and fuel fired electrical generating system
US6000211 *12 Nov 199714 Dic 1999York Research CorporationSolar power enhanced combustion turbine power plant and methods
US6418478 *11 Mar 19989 Jul 2002Commvault Systems, Inc.Pipelined high speed data transfer mechanism
US6422017 *3 Sep 199823 Jul 2002Ashraf Maurice BassilyReheat regenerative rankine cycle
US6484506 *26 Ago 199926 Nov 2002York Research Corp.Solar power enhanced combustion turbine power plant and methods
US6694740 *20 Sep 200224 Feb 2004Electric Power Research Institute, Inc.Method and system for a thermodynamic process for producing usable energy
US6792759 *21 Nov 200221 Sep 2004William S. RollinsHigh density combined cycle power plant process
US6857322 *5 Abr 200122 Feb 2005Bp Chemicals LimitedMethod for measuring compressibility during a polymerization process
US6912645 *18 Jul 200228 Jun 2005Lucent Technologies Inc.Method and apparatus for archival data storage
US6941759 *22 Nov 200213 Sep 2005Jasper Energy Development LlcSolar power enhanced combustion turbine power plants and methods
US7035880 *6 Jul 200025 Abr 2006Commvault Systems, Inc.Modular backup and retrieval system used in conjunction with a storage area network
US7040095 *16 Ago 20059 May 2006Lang Fred DMethod and apparatus for controlling the final feedwater temperature of a regenerative rankine cycle
US7089383 *6 Jun 20038 Ago 2006Hewlett-Packard Development Company, L.P.State machine and system for data redundancy
US7330997 *3 Jun 200412 Feb 2008Gary OdomSelective reciprocal backup
US7343459 *2 May 200511 Mar 2008Commvault Systems, Inc.Systems and methods for detecting & mitigating storage risks
US7617297 *26 Jul 200510 Nov 2009International Business Machines CorporationProviding archiving of individual mail content while maintaining a single copy mail store
US7640746 *25 May 20065 Ene 2010Markon Technologies, LLCMethod and system integrating solar heat into a regenerative rankine steam cycle
US7668884 *28 Nov 200623 Feb 2010Commvault Systems, Inc.Systems and methods for classifying and transferring information in a storage network
US7788230 *23 Ene 200731 Ago 2010International Business Machines CorporationBacking-up and restoring files including files referenced with multiple file names
US7818495 *28 Ene 200819 Oct 2010Hitachi, Ltd.Storage device and deduplication method
US7856414 *22 Mar 200221 Dic 2010Christopher ZeeAssured archival and retrieval system for digital intellectual property
US7873806 *27 Jul 200918 Ene 2011Commvault Systems, Inc.Snapshot storage and management system with indexing and user interface
US7882077 *30 Mar 20071 Feb 2011Commvault Systems, Inc.Method and system for offline indexing of content and classifying stored data
US7921077 *29 Jun 20065 Abr 2011Netapp, Inc.System and method for managing data deduplication of storage systems utilizing persistent consistency point images
US7962452 *28 Dic 200714 Jun 2011International Business Machines CorporationData deduplication by separating data from meta data
US8055618 *18 Abr 20118 Nov 2011International Business Machines CorporationData deduplication by separating data from meta data
US8086799 *12 Ago 200827 Dic 2011Netapp, Inc.Scalable deduplication of stored data
US8131687 *13 Nov 20086 Mar 2012International Business Machines CorporationFile system with internal deduplication and management of data blocks
US8156279 *15 Oct 201010 Abr 2012Hitachi, Ltd.Storage device and deduplication method
US8170994 *31 Oct 20071 May 2012Symantec CorporationTechniques for virtual archiving
US8190823 *18 Sep 200829 May 2012Lenovo (Singapore) Pte. Ltd.Apparatus, system and method for storage cache deduplication
US8234444 *11 Mar 200831 Jul 2012International Business Machines CorporationApparatus and method to select a deduplication protocol for a data storage library
US20020055972 *19 Dic 20019 May 2002Weinman Joseph BernardDynamic content distribution and data continuity architecture
US20050150230 *21 Sep 200414 Jul 2005Rollins William S.IiiHigh density combined cycle power plant process
US20060095470 *4 Nov 20044 May 2006Cochran Robert AManaging a file in a network environment
US20060260314 *27 Mar 200623 Nov 2006Kincaid Ronald FMethod and system integrating combined cycle power plant with a solar rankine power plant
US20060266039 *25 May 200630 Nov 2006Skowronski Mark JMethod and system integrating solar heat into a regenerative rankine steam cycle
US20070136200 *9 Dic 200514 Jun 2007Microsoft CorporationBackup broker for private, integral and affordable distributed storage
US20070151244 *18 Dic 20065 Jul 2007Gurin Michael HThermodynamic Power Conversion Cycle and Methods of Use
US20070271316 *22 May 200622 Nov 2007I3Archives, Inc.System and method for backing up medical records
US20080005141 *29 Jun 20063 Ene 2008Ling ZhengSystem and method for retrieving and using block fingerprints for data deduplication
US20090049260 *12 Ago 200819 Feb 2009Upadhyayula Shivarama NarasimhHigh performance data deduplication in a virtual tape system
US20090268903 *25 Abr 200829 Oct 2009Netapp, Inc.Network storage server with integrated encryption, compression and deduplication capability
US20090271402 *25 Abr 200829 Oct 2009Kiran SrinivasanDeduplication of Data on Disk Devices Based on a Threshold Number of Sequential Blocks
US20100088296 *3 Oct 20088 Abr 2010Netapp, Inc.System and method for organizing data to facilitate data deduplication
US20100223441 *11 May 20102 Sep 2010Mark David LillibridgeStoring chunks in containers
US20110035357 *26 Oct 201010 Feb 2011Daniel TingSystem and method for managing data deduplication of storage systems utilizing persistent consistency point images
US20110125720 *24 Nov 201026 May 2011Dell Products L.P.Methods and apparatus for network efficient deduplication
US20120084524 *30 Sep 20115 Abr 2012Parag GokhaleArchiving data objects using secondary copies
US20120179656 *20 Mar 201212 Jul 2012Alan BunteSystems and methods for creating copies of data, such as archive copies
US20120209809 *24 Abr 201216 Ago 2012Anand PrahladContinuous data protection over intermittent connections, such as continuous data backup for laptops or wireless devices
US20120271793 *26 Jun 201225 Oct 2012Parag GokhaleApplication-aware and remote single instance data management
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US9617874 *17 Jun 201311 Abr 2017General Electric Technology GmbhSteam power plant turbine and control method for operating at low load
US20110165526 *31 Ago 20097 Jul 2011Reinhard SchuExternal preheating of fresh air in solid material furnaces
US20140366537 *17 Jun 201318 Dic 2014Alstom Technology LtdSteam power plant turbine and control method for operating at low load
CN102588020A *7 Ene 201118 Jul 2012中国电力工程顾问集团公司Solar power generation and thermal power generation combined turbine-generator unit and realizing method
CN103016081A *6 Ene 20133 Abr 2013华北电力大学(保定)Mixed power generation system for biomass gasification and fossil energy
CN103115348A *5 Mar 201322 May 2013何敬东Device and method for reducing regenerative cycle coal burning heat consumption by using of solar energy
CN105332865A *6 Ago 201417 Feb 2016烟台龙源电力技术股份有限公司Tower type solar energy and coal-fired boiler photo-thermal cogeneration system
CN106523053A *26 Dic 201622 Mar 2017王连生Solar heat and thermal power plant coupling power generation and heat storage energy combination system and realization method
Clasificación de EE.UU.60/650, 60/641.8
Clasificación internacionalF01K25/00, F03G6/00
Clasificación cooperativaY02E10/46, F03G6/005, F05B2220/301, F01K3/18
Clasificación europeaF01K3/18, F03G6/00R2
Eventos legales
24 Jun 2010ASAssignment
Effective date: 20070222