US20140076412A1 - Method of Draining Heat-Transfer Oil in a Solar Power Plant, and Equipment for Draining, Storing and Replenishing Heat-Transfer Oil in Order to Implement Said Method - Google Patents

Method of Draining Heat-Transfer Oil in a Solar Power Plant, and Equipment for Draining, Storing and Replenishing Heat-Transfer Oil in Order to Implement Said Method Download PDF

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Publication number
US20140076412A1
US20140076412A1 US14/119,918 US201114119918A US2014076412A1 US 20140076412 A1 US20140076412 A1 US 20140076412A1 US 201114119918 A US201114119918 A US 201114119918A US 2014076412 A1 US2014076412 A1 US 2014076412A1
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United States
Prior art keywords
oil
conduits
loop
installation
conduit
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Abandoned
Application number
US14/119,918
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English (en)
Inventor
Jesùs Lacalle Bayo
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.)
GD Energy Services SA
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Logistica Y Acondicionamientos Industriales Sau
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 Logistica Y Acondicionamientos Industriales Sau filed Critical Logistica Y Acondicionamientos Industriales Sau
Assigned to LOGISTICA Y ACONDICIONAMIENTOS INDUSTRIALES, S.A.U. reassignment LOGISTICA Y ACONDICIONAMIENTOS INDUSTRIALES, S.A.U. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LACALLE BAYO, JESUS
Publication of US20140076412A1 publication Critical patent/US20140076412A1/en
Assigned to GD ENERGY SERVICES, S.A.U. reassignment GD ENERGY SERVICES, S.A.U. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: LOGISTICA Y ACONDICIONAMIENTOS INDUSTRIALES, S.A.U.
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24J2/4634—
    • F24J2/4607—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/50—Preventing overheating or overpressure
    • F24S40/53—Preventing overheating or overpressure by venting solar heat collector enclosures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/60—Arrangements for draining the working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S80/20—Working fluids specially adapted for solar heat collectors
    • 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
    • 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
    • Y02E10/44—Heat exchange systems
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0402—Cleaning, repairing, or assembling
    • Y10T137/0419—Fluid cleaning or flushing
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/6416—With heating or cooling of the system
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y10T137/86035—Combined with fluid receiver

Definitions

  • a method for draining thermal oil at a solar thermal plant, and an installation for drainage, storage and replacement of thermal oil for implementing this method is disclosed.
  • This invention covers a method for draining thermal oil at a solar thermal plant, in which the oil is withdrawn from this even at high temperatures, stored in appropriate isolation and temperature conditions, and then returned into the loop from which this was withdrawn or to another line or tank of the installation at the plant.
  • This also refers to an installation that can be used for cleaning circuits through which fluids such as thermal oil circulate, for example at a solar thermal plant.
  • Thermal fluids have a high environmental risk through toxicity, and at high temperatures also involve a high risk of ignition or explosion.
  • a solar thermal installation comprises a set of collection circuits through which thermal oil circulates.
  • This thermal oil reaches a temperature of almost 400°.
  • Solar thermal installations also undergo deterioration and breakdowns, sometimes stemming from the high corrosiveness of oil and/or of its contamination, which may have the effect of the pressure in the installations rising, placing these at risk of breakage, for which reason there is also a risk of auto-ignition of oil when its temperature is high in the presence of oxygen, for example, the oxygen in the air.
  • One purpose of this invention is thus to propose an installation for the removal, storage and replacement of this oil, enabling performing the repair or processes for maintenance and cleaning of the lines and equipment that has been drained in order to keep part of this installation running, minimising energy losses, and a method for carrying this out.
  • the oil is allowed to cool in this tank until this is taken back into the installation at an appropriate temperature of around 80°.
  • the treatment times are nevertheless very long due to the high temperature, and there is also a significant risk of deflagration.
  • the tank works under pressure and is filled with nitrogen to prevent any presence of air.
  • the installation is unloaded by means of rinsing by injecting nitrogen, to prevent contact with air, which also entails high costs as well as not providing any total guarantee as to the lack of oxygen through not being able to detect nitrogen leaks.
  • the invention being proposed consists of an installation for draining, storing and replacing the thermal oil at a solar thermal plant, normally a transportable installation, comprising the following items;
  • the drainage method involves the following operations:
  • Each of the stages involves the relevant opening/closing of the valves, as will be stated below and the activation of the relevant impelling, cooling and/or suction devices.
  • FIG. 1 shows a schematic view of the installation of the invention running in a first phase of the process in which the auxiliary conduits for the loop forming the communication conduits between the oil tank and the pumping device are filled with oil;
  • FIG. 2 shows a schematic view of the installation of the invention running in a first phase of the process in which the auxiliary conduits of the loop forming the drainage conduits are filled with oil;
  • FIG. 3 shows a schematic view of the installation of the invention running in a first phase of the process in which the auxiliary conduits of the loop forming the filling conduits are filled with oil; the operations of FIGS. 1 , 2 and 3 can be performed simultaneously in the same operation or sequentially;
  • FIG. 4 shows the schematic view of the installation of FIGS. 1 to 3 , but running in a second phase of the process in which there is a rinsing of the content of the loop of the installation in which the oil to be treated is contained;
  • FIG. 5 shows the schematic view of the installation of FIGS. 1 to 4 , but running in a third phase of the process, in which the loop of the installation is emptied by applying forced suction;
  • FIG. 6 shows the schematic view of the installation of FIGS. 1 to 5 , but running in a fourth phase of the process, in which the loop of the installation is filled by applying an impulsion force;
  • FIG. 7 shows the schematic view of the installation of FIGS. 1 to 6 , but running in a fifth phase of the process, in which the conduits, normally portable, which have been used for carrying out the previous processes, are emptied.
  • the solar thermal installation comprises general conduits ( 1 ) and, isolated by means of valves ( 91 , 92 ), a loop of the installation ( 2 ) corresponding to a group of solar collectors arranged in series:
  • a first phase consists in filling the different conduits; this takes place simultaneously or sequentially. Initially one has to proceed to fill the interior loop made up of conduits ( 80 , 70 , and 65 ); to this end valves ( 53 , 52 , 43 , 42 , 54 ) are left open and the others are closed. Valve ( 61 ) can be left open to ensure that the pressure in the tank is at atmospheric level. The temperature is that of the oil in the tank, not over 80° C., nor under 12° C. The other valves will remain closed. The pumping device is activated and oil is made to circulate through the conduits ( 65 , 80 and 70 ).
  • valves ( 54 , 53 , 52 , 56 , 13 , 14 , 32 , 31 , 42 , and 41 ) have to be open.
  • valve ( 61 ) can be left open. The oil will thus circulate through conduits ( 70 , 30 , 14 , 50 , and 80 ) driven by the pumping set ( 6 ).
  • valves ( 23 , 24 , 33 , 31 , 42 , 41 , 54 , 53 , 52 and 58 ) to be open, and the rest, except for valve ( 61 ), as stated above, to be closed.
  • the oil will thus circulate through conduits 70 , 68 , 60 , 20 , 50 , and 80 .
  • valves ( 13 , 14 , 56 , 32 , 33 , 31 , 42 , 41 , 54 , 53 , 52 , 58 , 23 and 24 ) will have to be left open.
  • Valve ( 61 ) can also be open.
  • valves ( 11 and 21 ) which are connected with the loop of the installation are opened, and valves 14 , 32 , 31 , 42 , 41 , 54 , 53 , 52 , 58 , and 23 should also be open.
  • the other valves, except for valve ( 61 ) will be closed, the oil circulating through conduits ( 68 , 60 , 40 , 50 , 80 , 70 ).
  • valves ( 22 , 21 , 11 , 14 , 32 , 31 , 42 , 41 , 62 ) will be open and valve ( 61 ) will be closed and the depression or suction set will come into operation ( 8 ).
  • the oil in the loop is now cold and by suction the oil will be replaced by air which comes in through valve ( 22 ).
  • valves ( 11 , 14 , 32 , 31 , 42 , 41 , 54 , 53 , 52 , 58 , 23 , and 21 ) are left open and valve ( 61 ) can be open.
  • the air that was in the loop of the installation ( 2 ) thus goes through the conduits up to the tank ( 7 ), and if necessary to the exterior through the valve ( 61 ).
  • After filling the loop valves ( 11 , 12 ) are closed and the installation can now be used.
  • the set of conduits then has to be collected, for which purpose the oil has to be taken to the oil tank ( 7 ). This is done by connecting the depression or suction set ( 8 ) and opening all the valves, even the ones for atmospheric intake ( 12 , 22 , 55 ). Like the filling, the drainage can be done by loops by closing the relevant valves that are not involved in draining the relevant loop.
  • valves are normally electronically operated electric valves and a control system is designed for opening and closing the valves in groups according to the phase or operation to be performed.
  • the set of apparatus is preferably mounted on the platform of a vehicle or the trailer of a vehicle.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
US14/119,918 2011-05-27 2011-05-27 Method of Draining Heat-Transfer Oil in a Solar Power Plant, and Equipment for Draining, Storing and Replenishing Heat-Transfer Oil in Order to Implement Said Method Abandoned US20140076412A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2011/070385 WO2012164105A1 (fr) 2011-05-27 2011-05-27 Procédé destiné au drainage d'huile thermique dans une installation thermosolaire, et installation de drainage, stockage et renouvellement d'huile thermique pour mettre en oeuvre ce procédé

Publications (1)

Publication Number Publication Date
US20140076412A1 true US20140076412A1 (en) 2014-03-20

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US14/119,918 Abandoned US20140076412A1 (en) 2011-05-27 2011-05-27 Method of Draining Heat-Transfer Oil in a Solar Power Plant, and Equipment for Draining, Storing and Replenishing Heat-Transfer Oil in Order to Implement Said Method

Country Status (6)

Country Link
US (1) US20140076412A1 (fr)
EP (1) EP2716995A4 (fr)
AU (1) AU2011369838A1 (fr)
MX (1) MX2013013607A (fr)
WO (1) WO2012164105A1 (fr)
ZA (1) ZA201308487B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140202555A1 (en) * 2011-09-02 2014-07-24 Gd Energy Services S.A.U. Method for Draining Thermal Oil in a Thermosolar Plant, and Corresponding Auxiliary Installation for Carrying Out Said Method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4262658A (en) * 1978-06-26 1981-04-21 Owens-Illinois, Inc. Drainable solar collector apparatus
US4440152A (en) * 1981-10-26 1984-04-03 Western Solar Products, Inc. Zero gauge solar system
US4644935A (en) * 1984-09-21 1987-02-24 Rayflow Corp. Solar heater control
US20100192606A1 (en) * 2009-01-30 2010-08-05 Panasonic Corporation Liquid circulation heating system
US20100224182A1 (en) * 2007-10-03 2010-09-09 Dux Manufacturing Limited Solar Hot Water System and Method of Operating a Solar Hot Water System

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE393962B (sv) * 1974-04-26 1977-05-31 Joenkoepings Mek Werkstads Foretredesvis ombord pa fartyg anordnad anleggning for lossning och lensning av last- och/eller spolvetska
US4458669A (en) * 1981-03-02 1984-07-10 Lee Kap Joong Building heating system
US4691692A (en) * 1985-12-05 1987-09-08 Conner Jr Leo B Solar energy system with delayed drain-back
DE4338604A1 (de) * 1993-11-11 1995-05-18 Sandler Energietechnik Solarkollektor-Befüllung & Entleerung
CN200951755Y (zh) * 2006-04-18 2007-09-26 立晏企业有限公司 动力方向机同步换油装置
EP2306116B1 (fr) * 2009-10-01 2011-12-07 European Solar Engineering SA Installation solaire thermique à drainage gravitaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4262658A (en) * 1978-06-26 1981-04-21 Owens-Illinois, Inc. Drainable solar collector apparatus
US4440152A (en) * 1981-10-26 1984-04-03 Western Solar Products, Inc. Zero gauge solar system
US4644935A (en) * 1984-09-21 1987-02-24 Rayflow Corp. Solar heater control
US20100224182A1 (en) * 2007-10-03 2010-09-09 Dux Manufacturing Limited Solar Hot Water System and Method of Operating a Solar Hot Water System
US20100192606A1 (en) * 2009-01-30 2010-08-05 Panasonic Corporation Liquid circulation heating system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140202555A1 (en) * 2011-09-02 2014-07-24 Gd Energy Services S.A.U. Method for Draining Thermal Oil in a Thermosolar Plant, and Corresponding Auxiliary Installation for Carrying Out Said Method
US9217583B2 (en) * 2011-09-02 2015-12-22 Gd Energy Services S.A.U. Method for draining thermal oil in a thermosolar plant, and corresponding auxiliary installation for carrying out said method

Also Published As

Publication number Publication date
MX2013013607A (es) 2014-01-08
EP2716995A4 (fr) 2015-01-07
EP2716995A1 (fr) 2014-04-09
AU2011369838A1 (en) 2013-12-12
ZA201308487B (en) 2014-07-30
WO2012164105A1 (fr) 2012-12-06

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AS Assignment

Owner name: LOGISTICA Y ACONDICIONAMIENTOS INDUSTRIALES, S.A.U

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LACALLE BAYO, JESUS;REEL/FRAME:031666/0382

Effective date: 20131122

AS Assignment

Owner name: GD ENERGY SERVICES, S.A.U., SPAIN

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Effective date: 20140128

STCB Information on status: application discontinuation

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