AU2013265698B2 - Method for exchanging heat between a salt melt and a further medium in a coiled heat-exchanger - Google Patents
Method for exchanging heat between a salt melt and a further medium in a coiled heat-exchanger Download PDFInfo
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- AU2013265698B2 AU2013265698B2 AU2013265698A AU2013265698A AU2013265698B2 AU 2013265698 B2 AU2013265698 B2 AU 2013265698B2 AU 2013265698 A AU2013265698 A AU 2013265698A AU 2013265698 A AU2013265698 A AU 2013265698A AU 2013265698 B2 AU2013265698 B2 AU 2013265698B2
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- Prior art keywords
- heat
- heat transfer
- salt melt
- transfer medium
- heat exchanger
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- 150000003839 salts Chemical class 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000000155 melt Substances 0.000 description 5
- 102100033945 Glycine receptor subunit alpha-1 Human genes 0.000 description 4
- 101000996297 Homo sapiens Glycine receptor subunit alpha-1 Proteins 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- SKZKKFZAGNVIMN-UHFFFAOYSA-N Salicilamide Chemical compound NC(=O)C1=CC=CC=C1O SKZKKFZAGNVIMN-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000374 eutectic mixture Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Inorganic materials [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
- F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
-
- 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
-
- 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
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/06—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium
-
- 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
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
- F22B1/167—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour using an organic fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/22—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight
- F22B21/26—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight bent helically, i.e. coiled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D2020/0047—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material using molten salts or liquid metals
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a method for indirectly exchanging heat between a salt melt (2, 2') as a first heat transfer medium, and at least one second heat transfer medium (15, 15'). According to the invention, at least one coiled heat-exchanger (5) is used for the purpose of exchanging heat between the salt melt (2, 2') and the second heat transfer medium (15, 15').
Description
PCT/EP 2013/001420 WO 2013/174486
Description
Method for exchanging heat between a salt melt and a further medium in a coiled heat- exchanger
The invention relates to a process for indirect heat exchange between a salt melt as first heat transfer medium and at least one second heat transfer medium such as heat transfer oil. Salt melts are, for example, used as heat transfer medium in solar thermal power stations.
Here, a heat transfer medium is a liquid, gaseous or supercritical medium which takes up or releases heat at one place in the power station process and releases it again or takes it up again at another place in the power station process or outside the latter. In this sense, a working medium into which thermal energy is introduced in the power station process in order to convert this energy into mechanical work is also considered to be a heat transfer medium.
In solar thermal power stations, electric power is generated from the energy of the sun by means of a thermodynamic circular process. Here, superheated vapour is generated from a working medium (e.g. water or ammonia) circulating in a vapour circuit and is subsequently expanded so as to perform work in a steam (vapour) turbine coupled with an electric generator. Heat can be supplied to the working medium directly by means of solar radiation or indirectly via a heat transfer medium (e.g. heat transfer oil, salt melt) which is in turn heated by means of concentrated sunlight. To extend power generation into times at which the sun is not shining or to compensate for cloud-related fluctuations in incoming solar radiation, part of the incident solar heat can be temporarily stored by means of the same heat transfer medium (direct) or another heat transfer medium (indirect). Salt melts (typically eutectic mixtures of KN03 and NaN03) are usually used for heat storage; these melts are heated directly or indirectly via another heat transfer medium, for example heat transfer oil, to temperatures in the range 250-400°C or 600°C and stored in flat bottom tanks and transfer their heat either directly or indirectly to the working medium.
To effect heat exchange between a salt melt and a further heat transfer medium, it is customary to use shell-and-tube heat exchangers, known as STHEs. Owing to the WO 2013/174486 PCT/EP 2013/ 001420 2 large quantities of heat to be transferred at small temperature differences between the heat-transferring heat transfer media, a plurality of STHEs are connected in series. In existing plants (Andasol 1 and 2), for example, six heat exchangers are arranged for the loading and unloading of the salt melt stores. In the case of even higher quantities of heat to be transferred, parallel trains have to be constructed. This leads to high capital costs and additional efficiency losses during heat transfer.
In addition, the STHEs used hitherto have, owing to their structure, low flexibility in respect of the temperature changes during starting up and running down of the power station or on loading and unloading the energy store, which leads to an increased reaction time in the case of load fluctuations and, resulting therefrom, to difficulties in adapting to the requirements of the power grid.
It is therefore an object of the present invention to provide a process of the type mentioned at the outset by means of which the disadvantages of the prior art are overcome.
This object is achieved by a process according to Claim 1. Dependent Claims 2 to 8 relate to preferred embodiments.
Accordingly, a process for indirect heat exchange between a salt melt as first heat transfer medium and at least one second heat transfer medium, for example heat transfer oil or water or steam, is provided. According to the invention, the salt melt and the second heat transfer medium are conveyed through at least one helically coiled heat exchanger in order to effect heat exchange.
Helically coiled heat exchangers, known as CWHEs (derived from the name Coil-Wound Heat Exchangers), are specific types of heat exchangers which are at present used in various industrial processes, for example the methanol scrub, natural gas liquefaction or in ethylene production. A helically coiled heat exchanger generally has a plurality of tubes which are coiled in a plurality of layers around a central core tube. The tubes are surrounded by a shell which bounds an outer space around the tubes, hereinafter referred to as cylindrical space. Furthermore, the tubes are mostly brought together in perforated plates at the ends of the heat exchanger to form one or more bundles and connected to ports on the shell of the heat exchanger. The tubes of the 3 2013265698 03 Mar 2017 arranged at various heights which determine serious heating levels for heating the vessel.
Any discussion Of the prior aft: throughout the specification should: In no way he considered as an admission that such prior art is widely known or forms part of common genera! knowledge in the field. 5 It is an object of the present invention to overcome or ameliorate: at: least one of the disadvantages of the prior art, or to provide a useful alternative. it is an object of a preferred embodiment of the present invention to provide a process of the type mentioned at the outset by means of which the disadvantages of the prior art, in particular In respect of the previously used STHEs, are overcome. 0 According to a first aspect, the invention provides a process for indirect heat exchange between a salt meit as first heat transfer medium and at least one second heat transfer medium, wherein the salt melt and the second heat transfer medium are introduced into a helically coiled heat exchanger and conveyed through this, with the heat exchanger having a plurality of tubes which are coiled in a plurality of layers around a central core tube and are 5 surrounded by a shell which bounds a cylindrical space around the tubes and the salt melt being passed through the cylindrical space of the helically coiled heat exchanger and the temperature of the salt melt being In the-range from about 250°C to about 6,00oOt and the second heat transfer medium or further heat transfer media, which is/are a salt melt, water,: steam,ammonia, supercritical carbon dioxide or heat transfer oil is/are conveyed through the 0 tubes of the helically coiled heatexchanger.
According to a second aspect, the invention provides use of a process: according to the first aspect in a sbfar thermal power Station,: A process for indirect heat: exchange between a salt melt as first heat transfer medium and at least one second heat transfer medium:, for example heat transfer oil or water or steam, is: 25 provided. According to the Invention,, thesalt melt and the second heat transfer medium are: introduced Into a helically coiled heat exchanger and conveyed through: this in order to effect heat exchange, with the.helically coiled heatexchanger having a plurality of tubes which are: coiled in a, plurality of layers around a central core tube and are: surrounded by ashell which bounds: a cylindrical space around thetubes and the salt melt being passed through the •30 cylindrical apace of the: helically coiled heat exchanger and the temperature of the salt meit being in··the range from about 25QDC to about 800°C. According to the invention,: the second heat transfer medium or further heat transfer media is/are passed: through the tubes of the 3a 2013265698 03 Mar 2017 5 helically .colled' heat exchanger; where the second heat exchanger or further heat exchangers is/are a salt melt, water, steam, ammonia, supercritical carbon dioxide or heat transfer oil.
Helically coiled heat exchangers, known as CWHEs {derived from the name Coil-Wound Heat Exchangers), are specific types of heat exchangers which are at present used in various industrial processes, for example the methanol scrub, natural gas liquefaction or In ethylene production. A helically coiled heat exchanger has a plurality of tubes which are colled In a plurality of layers around a central core tube. The tubes are surrounded by a shell which bounds an outer space around the tubes, hereinafter referred to as cylindrical space. Furthermore, the tubes are mostly brought together in perforated plates at the ends of the heat exchanger to form one or more bundles and connected to ports of the shell of the heat exchanger. The tubes of the heat exchanger can thus be supplied with a single heat transfer medium stream (single-stream) or a ____ _ WO 2013/174486 PCT/EP 2013/001420 4 A preferred variant of the process of the invention provides for the total quantity of heat to be exchanged between the two heat transfer media in a transfer line to be exchanged via not more than two CWHEs. A plurality of heat transfer steps, for example preheating and/or vaporization and/or superheating of a heat transfer medium, for example water or steam, should preferably be carried out in one CWHE. A particularly preferred variant of the process of the invention provides for the total quantity of heat to be exchanged between the two heat transfer media in a transfer line to be exchanged via precisely one CWHE. The preheating, vaporization and superheating of a heat transfer medium, for example water or steam, should preferably be carried out in precisely one CWHE.
The process of the invention can be employed particularly advantageously in solar thermal power stations since, owing to the mechanical simplicity of CWHEs, the heat store of a solar thermal power station can be made considerably more compact than is possible according to the prior art, which leads to significantly lower capital costs.
In solar thermal power stations, it is also possible for uses in which heat transfer media or working media which are not salt melts are to exchange heat with one another, for example heat transfer oil and water/steam, to occur. Here too, helically coiled heat exchangers can advantageously be used for exchanging heat between the heat transfer media which are not salt melts. The heat exchange between the heat transfer media or working media can take place in one or in a plurality of parallel transfer line(s).
In the following, the invention will be illustrated with the aid of examples. The figures show:
Figure 1 a schematic depiction of two processes for indirect heat exchange between a salt melt as first heat transfer medium and a second heat transfer medium with the aid of a helically coiled heat exchanger in a solar thermal power station; WO 2013/174486 PCT/ EP 2013/ 001420 5
Figure 2 the helically coiled heat exchanger of Fig. 1 in a perspective and partially cut-open view.
First example:
The route of the heat transfer medium in the first example is shown by continuous lines in Fig. 1 and 2. Salt melt 2 as first heat exchanger is taken at a temperature of about 300°C from the storage tank 1 and fed via a line 4 into a helically coiled heat exchanger 5 which is shown in perspective view in Fig. 2.
The helically coiled heat exchanger 5 shown in Fig. 2 has a shell 6 which surrounds a cylindrical space 7 within the heat exchanger 5. Within the cylindrical space 7, there are a plurality of tubes 8 which are coiled in a plurality of layers around a central core tube 9. The heat exchanger 5 shown in Fig. 2 has three bundles 10 of tubes which can be supplied, in each case via separate ports 11 or 21, with fluids. Flowever, a singlestream embodiment having a single bundle 10 of tubes is adequate for the present use. The in each case three bundles 10, ports 11 and 21 present should in each case be considered to have been replaced by one bundle 10, one port 11 at the lower end of the heat exchanger 5 and one port 21 at the upper end of the heat exchanger. A singlestream embodiment will therefore be assumed in the following description.
The salt melt 2 is introduced into the cylindrical space 7 of the heat exchanger 5 via the line 4 and a port 16 at the lower end of the heat exchanger. At the upper end of the heat exchanger 5, heat transfer oil having a temperature of about 400°C is introduced as second heat transfer medium 15 via the port 21 into the tubes 8 of the helically coiled heat exchanger 5. Flere, the hot heat transfer oil 15 flowing into the tubes 8 undergoes indirect heat exchange with the salt melt 2 which flows in the cylindrical space 7 and is heated. The heated salt melt 2 leaves the cylindrical space 7 of the heat exchanger 5 with a temperature of about 400°C via a port 14 at the upper end of the heat exchanger 5 and is, as depicted in Fig. 1, introduced via a line 17 into a second storage tank 20. The heated salt melt 2 can be taken from the storage tank 20 for further use. The heat transfer oil 15 which has been cooled to a temperature of about 300°C leaves the heat exchanger 5 at its lower end via the port 11.
Second example: WO 2013/174486 PCT/ EP 2013/ 001420 6
The route of the heat transfer medium in the second example is drawn in as broken lines in Fig. 1 and 2. The salt melt 2’ is conveyed by means of a pump 3 from the storage tank 1 by the line 4’ to the heat exchanger 5. At the upper end of the heat exchanger 5, the salt melt 2’ is introduced via the port 14 into the cylindrical space 7 of 5 the heat exchanger 5 at a temperature in the range from 250°C and 600°C, in general from 250°C to 400°C or in high-temperature applications also in a range from 550°C and 600°C. The salt melt 2’ undergoes indirect heat exchange with water 15’ which is introduced into the tubes 8 at the lower end of the heat exchanger 5 via the port 11.
The water 15’ is, while flowing through the tubes 8, firstly preheated, vaporized and 10 subsequently superheated before leaving the helically coiled heat exchanger 5 via the port 21 as superheated steam 15” and is subsequently fed to a steam turbine (not shown). The salt melt 2’ which has been cooled in the heat exchanger 5 leaves the cylindrical space 7 of the heat exchanger 5 via the port 16 and is conveyed via the line 17’ to the storage tank 20. From there, the salt melt 2’ can be reheated by direct or 15 indirect supply of solar energy so as to be available again for heat exchange in the heat exchanger 5.
Claims (7)
1. Process for indirect heat exchange between a salt melt as first heat transfer medium and at least one second heat transfer medium, 'wherein the salt melt and the second heat transfer medium are introduced into a helically coiled heat exchanger and conveyed through this, with the heat exchanger having a plurality of tubes which are coiled in a plurality of layers around a central core tube and are surrounded by a shell which bounds a-cylindrical space around the tubes and the salt melt being passed through the cylindrical space of the helically coiled heat exchanger and the temperature of the salt melt being in the range from about 250°C'to about 600°C, and the second heat transfer medium or further heat transfer media, which is/are a salt melt, wafer, steam, ammonia, supercritical carbon dioxide or heat transfer oil is/are conveyed through the tubes of the helically coiled heat exchanger.
2. Process according to Claim 1, wherein the temperature of the salt melt is in the range from about 250°C to about 400:°C.
3. Process according to Claim 1 or Claim 2, wherein the temperature of the salt melt is in the range from about 55Q°C to about 600*0.
4. Process according to any one of the preceding claims, wherein the total quantity of heat to be exchanged between the salt melt and the second heat transfer medium is exchanged in a plurality of helically coiled heat exchangers arranged in parallel.
5. Process according to any one of the preceding claims, wherein the total quantity of heat to be transferred between the salt melt and the second heat transfer medium is exchanged via not more than two helically coiled heat exchangers.
6. - Process according to any one of Claims 1,2,3 and 5, wherein the total quantity of heat to be exchanged between the salt melt and the second heat transfer medium is exchanged via precisely one helically coiled heat exchanger.
7. Use of a process according to any one of the preceding claims in a solar thermal power station.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012010311.5 | 2012-05-24 | ||
| DE102012010311A DE102012010311A1 (en) | 2012-05-24 | 2012-05-24 | Method for operating a solar thermal power plant |
| EP12005614.8A EP2667135A1 (en) | 2012-05-24 | 2012-08-02 | Method for heat exchange between a salt melt and another medium in a coiled heat exchanger |
| EP12005614.8 | 2012-08-02 | ||
| PCT/EP2013/001420 WO2013174486A1 (en) | 2012-05-24 | 2013-05-14 | Method for exchanging heat between a salt melt and a further medium in a coiled heat-exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2013265698A1 AU2013265698A1 (en) | 2014-11-27 |
| AU2013265698B2 true AU2013265698B2 (en) | 2017-03-23 |
Family
ID=46875616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2013265698A Ceased AU2013265698B2 (en) | 2012-05-24 | 2013-05-14 | Method for exchanging heat between a salt melt and a further medium in a coiled heat-exchanger |
Country Status (11)
| Country | Link |
|---|---|
| EP (2) | EP2667135A1 (en) |
| CN (1) | CN104321608A (en) |
| AU (1) | AU2013265698B2 (en) |
| CL (1) | CL2014003179A1 (en) |
| CY (1) | CY1118367T1 (en) |
| DE (1) | DE102012010311A1 (en) |
| ES (1) | ES2600734T3 (en) |
| MA (1) | MA37558B1 (en) |
| PT (1) | PT2856055T (en) |
| WO (1) | WO2013174486A1 (en) |
| ZA (1) | ZA201408436B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20130877A1 (en) | 2013-05-29 | 2014-11-30 | Alfa Laval Olmi S P A | POWER SUPPLY GROUP OF A TURBINE OF A THERMODYNAMIC SOLAR PLANT AND THERMODYNAMIC SOLAR SYSTEM INCLUDING THE SAME GROUP |
| DE102014107173B4 (en) | 2014-05-21 | 2022-03-03 | Pokolm Frästechnik GmbH & Co. KG | Tool for applying small impact impulses |
| EP3128278B1 (en) * | 2015-08-06 | 2018-06-20 | Linde Aktiengesellschaft | Feeding and removal of pipe streams with interim temperature in coiled heat exchangers |
| WO2017157533A1 (en) * | 2016-03-16 | 2017-09-21 | Linde Aktiengesellschaft | Safety heat exchanger for temperature control |
| CN105841522A (en) * | 2016-04-05 | 2016-08-10 | 中国科学院上海高等研究院 | Molten salt heat exchanger for intelligently controlling heat exchange flowing speed |
| EP4273447A1 (en) * | 2022-05-06 | 2023-11-08 | RD Estate GmbH & Co. KG | Steam generator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8201857A (en) * | 1982-05-06 | 1983-12-01 | Ir Leonard Hupkes | Solar heat storage vessel - contains heat supply and extract tubes in e.g. salt with 50-80 deg. centigrade m.pt. and connected via metal gauze |
| DE102010009485A1 (en) * | 2010-02-26 | 2011-09-01 | Siemens Aktiengesellschaft | Apparatus and method for generating superheated steam by means of solar energy based on the forced-circulation concept and use of superheated steam |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2355911B1 (en) * | 2010-03-24 | 2012-02-08 | Herlogas, S.A. | OVEN FOR THE FUSION OF INORGÉ? NICAS SALTS. |
| EP2600058A1 (en) * | 2011-12-01 | 2013-06-05 | Siemens Aktiengesellschaft | Device for converting a liquid work medium into a gas or vapor state, in particular for generating water steam |
-
2012
- 2012-05-24 DE DE102012010311A patent/DE102012010311A1/en not_active Withdrawn
- 2012-08-02 EP EP12005614.8A patent/EP2667135A1/en not_active Withdrawn
-
2013
- 2013-05-14 WO PCT/EP2013/001420 patent/WO2013174486A1/en active Application Filing
- 2013-05-14 PT PT137229951T patent/PT2856055T/en unknown
- 2013-05-14 EP EP13722995.1A patent/EP2856055B1/en not_active Not-in-force
- 2013-05-14 AU AU2013265698A patent/AU2013265698B2/en not_active Ceased
- 2013-05-14 MA MA37558A patent/MA37558B1/en unknown
- 2013-05-14 CN CN201380026583.9A patent/CN104321608A/en active Pending
- 2013-05-14 ES ES13722995.1T patent/ES2600734T3/en active Active
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2014
- 2014-11-17 ZA ZA2014/08436A patent/ZA201408436B/en unknown
- 2014-11-21 CL CL2014003179A patent/CL2014003179A1/en unknown
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2016
- 2016-11-09 CY CY20161101149T patent/CY1118367T1/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8201857A (en) * | 1982-05-06 | 1983-12-01 | Ir Leonard Hupkes | Solar heat storage vessel - contains heat supply and extract tubes in e.g. salt with 50-80 deg. centigrade m.pt. and connected via metal gauze |
| DE102010009485A1 (en) * | 2010-02-26 | 2011-09-01 | Siemens Aktiengesellschaft | Apparatus and method for generating superheated steam by means of solar energy based on the forced-circulation concept and use of superheated steam |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2600734T3 (en) | 2017-02-10 |
| EP2856055B1 (en) | 2016-08-10 |
| EP2667135A1 (en) | 2013-11-27 |
| MA20150348A1 (en) | 2015-10-30 |
| AU2013265698A1 (en) | 2014-11-27 |
| MA37558B1 (en) | 2016-05-31 |
| PT2856055T (en) | 2016-11-21 |
| ZA201408436B (en) | 2016-01-27 |
| EP2856055A1 (en) | 2015-04-08 |
| WO2013174486A1 (en) | 2013-11-28 |
| DE102012010311A1 (en) | 2013-11-28 |
| CN104321608A (en) | 2015-01-28 |
| CY1118367T1 (en) | 2017-06-28 |
| CL2014003179A1 (en) | 2015-07-10 |
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