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WO1997047879A1 - Procede permettant de faire fonctionner une centrale electrique a energie solaire pourvue d'au moins un generateur de vapeur a energie solaire, et centrale electrique a energie solaire - Google Patents

Procede permettant de faire fonctionner une centrale electrique a energie solaire pourvue d'au moins un generateur de vapeur a energie solaire, et centrale electrique a energie solaire Download PDF

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Publication number
WO1997047879A1
WO1997047879A1 PCT/DE1997/001106 DE9701106W WO9747879A1 WO 1997047879 A1 WO1997047879 A1 WO 1997047879A1 DE 9701106 W DE9701106 W DE 9701106W WO 9747879 A1 WO9747879 A1 WO 9747879A1
Authority
WO
WIPO (PCT)
Prior art keywords
solar
steam generator
solar power
residual moisture
power plant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE1997/001106
Other languages
German (de)
English (en)
Inventor
Wolfgang Köhler
Wolfgang Kastner
Reinhard Rippel
Hans-Jürgen CIRKEL
Hans-Christian TRÄNKENSCHUH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP97926969A priority Critical patent/EP0904490A1/fr
Priority to IL12622897A priority patent/IL126228A0/xx
Publication of WO1997047879A1 publication Critical patent/WO1997047879A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00—Devices for producing mechanical power from solar energy
    • F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
    • F03G6/065—Devices for producing mechanical power from solar energy with solar energy concentrating means having a Rankine cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/06—Control systems for steam boilers for steam boilers of forced-flow type
    • F22B35/16—Control systems for steam boilers for steam boilers of forced-flow type responsive to the percentage of steam in the mixture of steam and water
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

Definitions

  • the invention relates to a method for operating a solar power plant with at least one solar steam generator and to a solar power plant.
  • the incident solar radiation is bundled and used as a heat source for energy conversion.
  • Examples of solar power plants are parabolic trough, tower and dish power plants.
  • the solar radiation is, for example, concentrated approximately at a point from several mirrors arranged on frames, the heliostats, onto a common receiver, for example in the tower of a tower power station or on its own in a dish power station. There it heats a heat transfer medium.
  • a common receiver for example in the tower of a tower power station or on its own in a dish power station.
  • Another possibility of using solar energy is to focus the solar radiation approximately linearly on an absorber tube by means of parabolic trough collectors, which serves as a receiver. If the heat transfer medium, for example water, is evaporated directly in the receiver, this is referred to as direct evaporation. In the case of direct evaporation, the receiver is also referred to as a solar steam generator.
  • the invention is based on the object of largely avoiding the risk of overheating in the solar steam generator and reducing the costs of a solar power plant.
  • the feed water supply for the solar steam generator as a function of the residual moisture (1-x) of the wet steam at an output of the solar steam generator is set such that a predetermined setpoint (lx) * for the residual moisture (1-x) at the output of the solar steam generator of wet steam is present.
  • the solar power plant contains at least one solar steam generator and a control circuit for regulating the residual moisture (l-x) of the wet steam at the outlet of the solar steam generator.
  • a predetermined setpoint value (l-x) * for the residual moisture (l-x) of the wet steam at the outlet of the steam generator is present at the input of the solar steam generator.
  • the existence of the residual moisture (l-x) of the wet steam at the outlet of the solar steam generator presupposes that wet steam, ie. H. in other words, a mixture of water and steam is present.
  • the residual moisture (I-x) of the wet steam is preferably continuously recorded and used as a control variable for the supply of the mass flow (M) of the feed water for the solar steam generator.
  • a regulation is a process in which in a
  • Control loop continuously records the variable to be controlled (the "controlled variable”, in this case the residual moisture (l-x) of the wet steam) with another variable, the "reference variable” (here: the
  • a device for continuously detecting the residual moisture (lx) of the wet steam is provided at the outlet of the solar steam generator.
  • the residual moisture (lx) of the wet steam at the outlet of the solar steam generator is recorded repeatedly, either continuously or continuously.
  • the controlled variable is recorded continuously and compared with the reference variable (lx) *.
  • the controlled variable is continuously and repeatedly recorded only at certain points in time, the sampling times, and compared with the reference variable (1- x) *.
  • a transmitter device is provided for the reference variable (lx) * of the residual moisture (lx) of the wet steam, which is to follow the controlled variable in a predetermined dependency.
  • a controllable feed water valve is preferably provided as an adjusting device for the mass flow (M) of the feed water for the solar steam generator.
  • a solar power plant 2 comprises at least one solar steam generator 4.
  • the solar power plant 2 is, for example, a parabolic trough, tower or dish power plant.
  • Feed water is fed into an inlet 8 of the solar steam generator 4 via a feed line 6.
  • the wet steam generated in the solar steam generator 4 is discharged, for example, to a turbine via a discharge line 10 from the outlet 12 of the solar steam generator 4.
  • a feed water valve 14 is arranged in the feed line 6 as an adjusting device for the mass flow (M) of the feed water supply for the solar steam generator 4.
  • M mass flow
  • the discharge line 10 there is a device 16 for continuously recording the residual moisture (lx) of the wet steam at the outlet 12 of the solar Steam generator 4 arranged.
  • the feed water valve 14, the solar steam generator 4 and the device 16 for continuously detecting the residual moisture (lx) represent the controlled system 60 of the control circuit 50 according to the invention.
  • a transmitter device 22 acts on a control device
  • An electrical signal line 18 leads from the control device 20 to the controllable feed water valve 14 in the feed line 6.
  • the control circuit 50 is closed by an electrical feedback line 25, which connects the device 16 to an actual value input of the control device 20.
  • the signal direction in the control circuit 50 is indicated by the arrows 26.
  • the feed water supply for the solar steam generator 4 is always set via the feed line 6 with the feed water valve 14 as a function of the residual moisture (lx) of the wet steam at the outlet 12 of the solar steam generator 4 so that the outlet 12 of the solar steam generator 4 Steam generator 4, the predetermined setpoint (lx) * for the residual moisture (lx) of the wet steam is present.
  • the residual moisture (l-x) of the wet steam is continuously recorded by means of the device 16 and used as a control variable for the mass flow (M) of the feed water supply for the solar steam generator 4.
  • the residual moisture (lx) as a control variable, where x indicates the steam content at the outlet 12 of the solar steam generator 4, can be continuously compared with the reference variable (lx) * become. If a sampling control is used, the residual moisture (lx) of the wet steam is continuously recorded only at certain times, the sampling times, and compared with the reference variable (lx) *.
  • a plurality of solar steam generators 4 can also be connected in series.
  • a separate control circuit 50 can then be used for each of the solar steam generators 4 connected in series. As a result, each steam generator 4 is individually regulated in the case of a large number of solar steam generators 4.
  • Each downstream solar steam generator 4 is fed the outlet mass flow of the upstream solar steam generator 4 and an individually regulated feed water flow, which is regulated in such a way that the setpoint (lx) * for the residual moisture (lx) of the wet steam is output at the steam generator 4 is available .

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

L'invention concerne un procédé permettant de faire fonctionner une centrale électrique à énergie solaire (2) pourvue d'au moins un générateur de vapeur (4) à énergie solaire qui génère de la vapeur humide, selon lequel l'alimentation en eau du générateur solaire de vapeur (4) est réglée en fonction de l'humidité résiduelle (1-x) de la vapeur humide à la sortie (12) du générateur de vapeur (4) à énergie solaire de sorte qu'une valeur nominale prédéterminée (1-x)* de l'humidité résiduelle (1-x) de la vapeur humide soit maintenue à la sortie (12) du générateur de vapeur (4). Cette mesure évite, dans une large mesure, la surchauffe du générateur de vapeur (4) à énergie solaire.
PCT/DE1997/001106 1996-06-10 1997-06-02 Procede permettant de faire fonctionner une centrale electrique a energie solaire pourvue d'au moins un generateur de vapeur a energie solaire, et centrale electrique a energie solaire Ceased WO1997047879A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP97926969A EP0904490A1 (fr) 1996-06-10 1997-06-02 Procede permettant de faire fonctionner une centrale electrique a energie solaire pourvue d'au moins un generateur de vapeur a energie solaire, et centrale electrique a energie solaire
IL12622897A IL126228A0 (en) 1996-06-10 1997-06-02 Method of operating solar power plant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19623074 1996-06-10
DE19623074.8 1996-06-10

Publications (1)

Publication Number Publication Date
WO1997047879A1 true WO1997047879A1 (fr) 1997-12-18

Family

ID=7796508

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/001106 Ceased WO1997047879A1 (fr) 1996-06-10 1997-06-02 Procede permettant de faire fonctionner une centrale electrique a energie solaire pourvue d'au moins un generateur de vapeur a energie solaire, et centrale electrique a energie solaire

Country Status (4)

Country Link
EP (1) EP0904490A1 (fr)
IL (1) IL126228A0 (fr)
MA (1) MA24203A1 (fr)
WO (1) WO1997047879A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CY2418B1 (en) * 2003-11-05 2004-11-12 Nestoras Th Georgiou New type of running a electrical power plant.
WO2010132849A3 (fr) * 2009-05-15 2012-08-16 Areva Solar, Inc. Systèmes et procédés de production de vapeur à l'aide du rayonnement solaire
EP2053242A3 (fr) * 2007-10-22 2014-10-22 Deutsches Zentrum für Luft- und Raumfahrt e.V. Procédé de fonctionnement d'une centrale thermique solaire et centrale thermique solaire

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100743A (en) * 1976-12-20 1978-07-18 The Northwestern Mutual Life Insurance Company Gravity engine
JPS60164179A (ja) * 1984-02-07 1985-08-27 Mitsubishi Heavy Ind Ltd 太陽熱吸収器制御システム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100743A (en) * 1976-12-20 1978-07-18 The Northwestern Mutual Life Insurance Company Gravity engine
JPS60164179A (ja) * 1984-02-07 1985-08-27 Mitsubishi Heavy Ind Ltd 太陽熱吸収器制御システム

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
MUELLER M ET AL: "SOLARE FARMKRAFTWERKE UND DIREKTVERDAMPFUNG IN KOLLEKTOREN", FORSCHUNGSVERBUND SONNENENERGIE, 31 December 1993 (1993-12-31), pages 57 - 64, XP000647082 *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 333 (M - 443) 27 December 1985 (1985-12-27) *
THOMAS A: "SOLAR STEAM GENERATING SYSTEMS USING PARABOLIC TROUGH CONCENTRATORS", ENERGY CONVERSION AND MANAGEMENT, vol. 37, no. 2, 1 February 1996 (1996-02-01), pages 215 - 245, XP000546384 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CY2418B1 (en) * 2003-11-05 2004-11-12 Nestoras Th Georgiou New type of running a electrical power plant.
EP2053242A3 (fr) * 2007-10-22 2014-10-22 Deutsches Zentrum für Luft- und Raumfahrt e.V. Procédé de fonctionnement d'une centrale thermique solaire et centrale thermique solaire
WO2010132849A3 (fr) * 2009-05-15 2012-08-16 Areva Solar, Inc. Systèmes et procédés de production de vapeur à l'aide du rayonnement solaire
CN102741616A (zh) * 2009-05-15 2012-10-17 阿海珐太阳能公司 利用太阳辐射生产蒸汽的系统和方法
CN102741616B (zh) * 2009-05-15 2015-04-29 阿海珐太阳能公司 利用太阳辐射生产蒸汽的系统和方法

Also Published As

Publication number Publication date
MA24203A1 (fr) 1997-12-31
EP0904490A1 (fr) 1999-03-31
IL126228A0 (en) 1999-05-09

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