EP2379953A2 - Conduit absorbeur pour le réflecteur cylindro-parabolique d'une centrale solaire - Google Patents

Conduit absorbeur pour le réflecteur cylindro-parabolique d'une centrale solaire

Info

Publication number
EP2379953A2
EP2379953A2 EP10702010A EP10702010A EP2379953A2 EP 2379953 A2 EP2379953 A2 EP 2379953A2 EP 10702010 A EP10702010 A EP 10702010A EP 10702010 A EP10702010 A EP 10702010A EP 2379953 A2 EP2379953 A2 EP 2379953A2
Authority
EP
European Patent Office
Prior art keywords
radiation
absorber
thermal opening
absorber line
width
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.)
Withdrawn
Application number
EP10702010A
Other languages
German (de)
English (en)
Inventor
Andrea Pedretti
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.)
Airlight Energy IP SA
Original Assignee
Airlight Energy IP SA
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 Airlight Energy IP SA filed Critical Airlight Energy IP SA
Publication of EP2379953A2 publication Critical patent/EP2379953A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/74—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/88—Multi reflective traps
    • 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
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49355—Solar energy device making

Definitions

  • the present invention relates to an absorber line for a solar power plant according to claim 1 and a method for its production according to claim 12.
  • the radiation of the sun is mirrored by collectors with the help of the concentrator and focused specifically on a place in which thereby high temperatures.
  • the concentrated heat can be dissipated and used to operate thermal engines such as turbines, which in turn drive the generating generators.
  • Parabolic trough power plants have a large number of collectors, which have long concentrators with a small transverse dimension, and thus do not have a focal point but a focal line, which makes them fundamentally different in construction from the Dish Sterling and solar tower power plants.
  • These line concentrators today have a length of 20 m to 150 m, while the width can reach 5 m or 10 m and more.
  • an absorber line for the concentrated heat usually up to 400 0 C
  • a transport medium is a fluid such. Thermal oil or superheated steam in question, which circulates in the absorber lines.
  • trough collector is preferably designed as a parabolic trough collector
  • trough collectors are often used with spherical or only approximately parabolic trained concentrator, since an exactly parabolic concentrator with the above dimensions only with large, so economically difficult to make reasonable effort.
  • the nine SEGS trough power plants in Southern California together produce an output of approx. 350 MW; An additional power plant in Nevada is scheduled to go online and deliver over 60 MW.
  • Another example of a trough power plant is the Andasol 1 in Andalusia, with a concentrator area of 510'000 m 2 and 50 MW power, the temperature in the absorber lines being around 400 ° C.
  • the circulation system for the circulation of the heat-transporting fluid can reach a length of up to 100 km in such power plants, or more, when the concepts for the future large-scale plants are realized.
  • the cost of Andasol 1 is € 300 million.
  • the absorber lines are increasingly expensive to avoid these energy losses.
  • widespread conventional absorber lines are formed as a metal tube encased in glass, wherein there is a vacuum between glass and metal tube.
  • the metal tube carries in its interior, the heat-transporting medium and is provided on its outer surface with a coating that absorbs irradiated light in the visible range improved, but has a low radiation rate for wavelengths in the infrared range.
  • the enveloping glass tube protects the metal tube from cooling by wind and acts as an additional barrier to heat dissipation.
  • the disadvantage here is that the enveloping glass wall
  • the absorber line can be additionally provided with a surrounding mechanical protective tube, which must be provided with an opening for the incident solar radiation, but the absorber line otherwise protects quite reliably.
  • US Pat. No. 1,644,473 now shows an externally insulated absorber line having an absorber space extending longitudinally therethrough, into which concentrated radiation enters via a slot also extending longitudinally along the absorber line.
  • These means consist on the one hand of two of the slot opening opposite deflecting mirrors, in which case preferably in the slot a converging lens is arranged, the incoming radiation collected on the
  • the absorbing wall of the absorber space is provided with alternating elevations and grooves, on which the incoming radiation is scattered by reflection and so also distributed over the entire wall surface.
  • a heat-transporting fluid flows around the absorbent wall of the absorber chamber and dissipates the heat.
  • absorber lines of the type mentioned should now also be improved.
  • An absorber line with the features of claim 1.
  • a preferred embodiment of an externally insulated absorber line has the features of claim 3.
  • the means for reducing the radiation emitted by the absorbing surface increasingly reduce it with increasing temperature of the absorbing surface, and vice versa reduce the comparatively low temperature locally, can reduce the expense for an absorber line.
  • the operating temperature of the absorbing surface and the technical complexity for the reduction of the emitted radiation increases sharply, which is particularly significant if the temperature of the heat-transporting fluid to increase the efficiency of the power plant above the current 400 0 C also increased and for to be provided for industrial use.
  • complex means for the reduction of the emitted radiation at the output side of the absorber line ie concentrated in the high operating temperature region of the absorbent surface and simple (or no) means for reducing the emitted radiation at the input side provided.
  • the preferred embodiment of the present invention is particularly suitable for trough collectors with a spherically curved concentrator.
  • Such concentrators do not produce a focal line, but a focal line region, which as such requires a comparatively wide thermal opening.
  • a wide thermal opening is critical for high efficiency because of the radiation losses. According to the invention, the radiation losses are now reduced where they occur, while where the radiation losses are low, the simple, cost-effective construction with a wide thermal opening can be maintained unchanged.
  • FIG. 1 shows schematically a gutter collector with an absorber line according to the prior art
  • FIG. 2 shows a cross section through an externally insulated absorber line with an inner absorber space
  • FIG. 3 shows a view of the absorber line according to the invention
  • Figure 4 is a representation of the distribution of the flow of concentrated radiation in the thermal opening, un
  • Figure 5a to 5d shows the flow in the four different sections of the absorber line of Figure 2.
  • FIG. 6 shows a partial cross section through the absorber line formed according to the invention with an optical element.
  • a trough collector 1 is shown, of the kind as z.Bsp. Thousands are used in SEGS solar power plants.
  • a trough-shaped, as a mirror approximated in the cross section of a parabola concentrator 2 rests on suitably trained supports 3.
  • Solar radiation 4 is reflected at the mirror of the concentrator 2 and directed to an absorber 5; this is located at the location of the focal line 7 of the mirror.
  • a focal line area is created instead of a focal line
  • the absorber line 5 is suspended from suitable carriers 6 at the location of the focal line 7 or of the focal line area.
  • the mirror is pivotally mounted on the supports 3, so that the mirror can be traced to the seasonal (or the daily) position of the sun.
  • Fluid conveyed in the absorber line 5 absorbs the heat introduced into the line 5 by the concentrated solar radiation and transports it via a suitable, conventional, not shown in detail relief line system to the thermal machines of the power plant, where electricity is generated.
  • Such trough collectors 1 are known to those skilled in various embodiments in all details of the construction. Likewise, the person skilled in the art knows the appropriate guidance of the lines which lead the heat-transporting fluid to the respective gutter collector of a solar power plant and away from it. As a rule, but not necessarily, the heat-transporting fluid is in a circuit.
  • fluids are used for heat transport; in particular fluids such as oil, which have a high heat capacity, are preferred.
  • Water or air are scarcely used - at least not in the case of solar electricity production in the industrial dipstick - because their relatively small heat capacity, which is based on their volume, means that large volumes have to be moved through the power plant's piping system, which creates its own problems.
  • Figure 2 shows an externally insulated absorber duct 10 in a preferred embodiment for the application of the present invention in cross-section.
  • a here as a slot 11 with the edges 22,23 trained, extending along the absorber line 10 thermal opening 14 allows the passage of concentrated solar radiation into the interior of the conduit 10 into it, as shown in the figure using the example of a sun ray 4.
  • an absorber space 12 Longitudinally in the interior of the absorber line 10 extends an absorber space 12 to the preferably formed by a thin-walled hollow profile absorbent wall 13 is formed with a substantially constant wall thickness.
  • a jacket 18 surrounds the absorber space 12 substantially concentrically and in such a way that between it and the absorbent wall 13 a space 19 of annular cross-section is formed which extends longitudinally through the absorber line 10.
  • the absorbent wall 13 is formed as a corrugated profile.
  • Wall 13 absorbs, multiply reflected (each time again partially absorbed) and thus the incident radiation is scattered, which is exemplified by its reflected components 4 'to 4' "Thus distributed through the beam 4 energy distributed over the entire range of
  • the heat-transporting fluid flows constantly from the input side of the absorber line to its output side, whereby the absorbing wall 13 is cooled on the input side the strongest; Accordingly, the operating temperature of the absorbent wall 13 is the smallest on the input side, then rises evenly to the output side, where it is highest.
  • the heat-transporting fluid occurs, for example, with a temperature of z.Bsp. 60 0 C in the absorber line 10, is continuously heated on the way through this and leaves it with a starting temperature, which, for example, when using the present invention. in the case of air (or other media) at 650 0 C.
  • the absorbent wall 13 is cooled most strongly and on the output side weakest; in the present example, then its temperature T A w input side 150 0 C, then increases linearly over its length and is finally the output side at 650 0 C ( Figure 3).
  • the jacket 18 has an insulating layer which reduces or prevents a heat emission of the absorber line 10 to the outside. Since this insulation does not have to be permeable to incoming radiation as in a widely used type according to the prior art, it can be simple (thus also inexpensive) and effective at the same time, for example. be made of rock wool.
  • FIG. 3 shows a view of the absorber line 10 of Figure 2 with a view of the thermal opening 14. Schematically illustrated, the input-side port 20 for heat-transporting fluid, the output side of the absorber line 10 is denoted by 21.
  • the absorbent wall 13 in the presently preferred embodiment warms from 150 ° C on the input side to 650 ° C on the output side, s. the representation of the operating temperature curve T A W of the absorbing wall 13 over the length I of the absorber line 10. It should be noted that, for improved efficiency, in particular the industrial power producing solar power plants a high from today's perspective concentration of solar radiation, in the present example 80- aus (more according to the invention), ie 80 suns, as well as the highest possible temperature of the heat-transporting fluid (and thus the absorbent wall 13) is desirable and should therefore be sought.
  • the absorbent wall 13 In operation, i. at operating temperature, the absorbent wall 13 now radiates thermal radiation 24, as described below. This is emitted via the surface of the thermal opening 14 to the outside, which reduces the efficiency of the absorber line 10.
  • the thermal opening 14 is subdivided over its length into four sections 26 to 29, which each have the following means:
  • the thermal opening 14 has its full, non-reduced width b v .
  • these means have the thermal opening 14 with reduced width b re d 27
  • the thermal opening 14 is provided with a cover 30 which is transparent to radiation in the visible range and impermeable to radiation substantially in the infrared range or reduced permeability.
  • an optical element 31 is arranged at the thermal opening 14 of reduced width b re d 29 , which is also designed for concentrated radiation 4 incident on the thermal opening 14 of reduced width b red 2 9 Refraction of the beam path through the thermal opening 14 to pass therethrough ( Figure 6).
  • the optical element is further formed such that the radiation 4 is detected, which is incident in a width corresponding to the thermal opening 14 of non-reduced width b v .
  • a cover of the thermal opening 14 in the sections 26 and 27 can be omitted if the opening is directed against the bottom, since the hot air in the absorber chamber 12 due to the convection does not flow, thus no heat loss occurs.
  • Figure 4 now shows a general representation of the distribution K of the flux of concentrated radiation 4 in the region and across the width of the thermal
  • FIGS. 5a to 5d now show four diagrams 26 * to 29 *, corresponding in each case to the diagram of FIG. 4, corresponding to the ratios in the sections 26 to 29 of the absorber line 10 (FIG. 3), wherein additionally the flow W of the absorbent wall 13 emitted radiation 24 is registered. Since the absorbing wall 13 is heated substantially uniformly, the distribution W of the flow of radiation 24 is a horizontal straight line; the emitted radiation 24 emerges from the thermal opening 14 with substantially uniform intensity over the entire width b thereof.
  • the direction of the concentrated radiation 4 is assumed to be positive (into the line 10)
  • the direction of the emitted radiation 24 is negative (out of the line 10). Accordingly, the flow W should be drawn in the negative region of the vertical axis of the diagrams. For the sake of easier representation (intersections of the distribution K with the flow W) W is nevertheless entered with a positive value.
  • the flow W 26 is not relevant.
  • the width b of the thermal opening 14 is therefore not reduced and tuned to the full width b v of the distribution K of the concentrated radiation 4.
  • the ratios of FIG. 4 are present, the average flux D 2 through the opening 14 being 80'0OO [W / m 2 ] or 80 suns.
  • the river W 27 is already relevant. Accordingly, according to the invention, here the width of the thermal opening is reduced to the width b rec i 27 such that within the width b rec i 27 the sum of the flows K + W (concentrated radiation 4 and emitted radiation 24) is at least zero at each point (which would not be the case outside b red 27 ). Over every point of the width b reue 27 there is always more radiation in the sum than out. Thus, despite the heat emission W caused by radiation 24 over the entire width b re d 27, an exclusively positive energy input into the absorber chamber 12 results.
  • the average flux D27 (again the hatched areas) is more than 80,000 [W / m 2 ] or 80 suns, so that despite the reduced width b red 27, the energy input through the opening 14 is optimal.
  • section 28 of the river is 28 W significant.
  • the flow of the flow W 2 8 emitted by the absorbent wall 13 is reduced to the flow W 28 ' actually exiting through the orifice 14, the latter being decisive for the sizing of the width b re d 28, which in turn is such that the sum of the river F and the
  • the river W 29 is critical.
  • the distribution is now almost uniform. by the optical element 31, preferably that radiation 4 is detected, which incident in the region of the opening 14 over the unreduced width b v .
  • the optical element 31 thus additionally concentrates the radiation 4 concentrated by the concentrator 2, whereby the distribution of the flux F 2 g with respect to that of FIG. 4 and FIGS. 5 a to 5 c is advantageously changed in accordance with the curve drawn in the figure.
  • the width b re d 2 9 can generally be reduced to approximately 70% of the full width b v .
  • the use of such an optical element 31 results in the advantage that increasingly concentrated radiation 4 enters through the opening 14, which differs from the non-parallel solar radiation (opening angle of the solar radiation of approximately 0.5 ° , see above) or at the concentrator 2 ( Figure 1) scattered solar radiation comes.
  • a refractive index of 1.5 (glass) means that the width b re d 2 9 can be further reduced, finally about 50% of the full width b v , and still the energy corresponding to a concentration of 80 suns (parallel radiation ) is received by the line 10.
  • the energy loss W 2 g can be reduced by half.
  • the loss is no longer 50% (corresponding to 40 ⁇ 000 W / m 2 ) of the concentrated radiation 4 provided by the concentrator 2 (FIG. 1), but only 25%.
  • FIG. 6 shows a cross section through a part of the absorber line 10 in the section 29 at the location of the thermal opening 14.
  • the absorbent wall 13, the jacket 18, the annular space 19 and the optical element 31 are shown.
  • a concentrated sun ray 4 strikes the optical element 31 and is refracted against the solder 40 to do so that it runs as a beam 4 * in the optical element 31 and reaches the absorbing wall 13 as the beam 4 **, where it is scattered into the absorber chamber 12. It can be seen from the figure that, as mentioned with reference to FIG. 5 d, the entire radiation concentrated over the width b v is detected and passes through the width b re d 29 into the absorber chamber 12.
  • the shape of the optical element 31 may be graphically constructed by one skilled in the art and made accordingly. According to the invention, the element which is then complicated to produce is arranged only in the section where the losses would otherwise be too high due to the emitted radiation 24.
  • the example shown in Figures 4 and 5 relates to a preferred embodiment;
  • the person skilled in the art will adapt and appropriately design the concentration factor of the concentrator 2 (FIG. 1) or the distribution of the flux of the concentrated radiation 4 in the region of the thermal opening (as well as itself).
  • the means for reducing the emitted radiation 24 may be suitably combined with each other or other such means may be provided.
  • the width of the opening 14 instead of a gradation between the sections 26, 27, 28 and also 29 can be adjusted continuously to the increasing operating temperature of the absorbent wall 13.
  • the inventive compositions can be used at even higher operating temperatures than 650 0 C.

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

Abstract

L'invention concerne un tube absorbeur (10) qui présente une ouverture thermique (14) sur laquelle sont placés des moyens qui réduisent le rayonnement (26) émis vers l'extérieur par la surface absorbante (13) en raison de sa température de fonctionnement, et ce de manière accrue au fur et à mesure que la température de fonctionnement augmente.
EP10702010A 2009-01-08 2010-01-07 Conduit absorbeur pour le réflecteur cylindro-parabolique d'une centrale solaire Withdrawn EP2379953A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00020/09A CH700227A1 (de) 2009-01-08 2009-01-08 Absorberleitung für den Rinnenkollektor eines Solarkraftwerks.
PCT/CH2010/000003 WO2010078668A2 (fr) 2009-01-08 2010-01-07 Conduit absorbeur pour le réflecteur cylindro-parabolique d'une centrale solaire

Publications (1)

Publication Number Publication Date
EP2379953A2 true EP2379953A2 (fr) 2011-10-26

Family

ID=40823516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10702010A Withdrawn EP2379953A2 (fr) 2009-01-08 2010-01-07 Conduit absorbeur pour le réflecteur cylindro-parabolique d'une centrale solaire

Country Status (7)

Country Link
US (1) US20120031095A1 (fr)
EP (1) EP2379953A2 (fr)
CN (1) CN102292606A (fr)
CH (1) CH700227A1 (fr)
CL (1) CL2011001677A1 (fr)
WO (1) WO2010078668A2 (fr)
ZA (1) ZA201105003B (fr)

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ES2548879T3 (es) * 2008-03-28 2015-10-21 Airlight Energy Ip Sa Colector parabólico para una central solar
CH698860A1 (de) * 2008-05-07 2009-11-13 Airlight Energy Holding Sa Rinnenkollektor für ein Solarkraftwerk.
US20100043779A1 (en) * 2008-08-20 2010-02-25 John Carroll Ingram Solar Trough and Receiver
CH702469A1 (de) 2009-12-17 2011-06-30 Airlight Energy Ip Sa Parabol-Kollektor.
CH703998A1 (de) * 2010-10-24 2012-04-30 Airlight Energy Ip Sa Sonnenkollektor.
CH704007A1 (de) * 2010-10-24 2012-04-30 Airlight Energy Ip Sa Sonnenkollektor mit einer ersten Konzentratoranordnung und gegenüber dieser verschwenkbaren zweiten Konzentratoranordnung.
CH704006A1 (de) * 2010-10-24 2012-04-30 Airlight Energy Ip Sa Rinnenkollektor sowie Absorberrohr für einen Rinnenkollektor.
CH703995A2 (de) * 2010-10-24 2012-04-30 Airlight Energy Ip Sa Rinnenkollektor sowie Absorberrohr für einen Rinnenkollektor.
CN102135331A (zh) * 2011-03-16 2011-07-27 北京航空航天大学 一种槽式太阳能集热器
CN102927698B (zh) * 2011-08-09 2015-07-22 北京兆阳光热技术有限公司 一种吸热、储热、换热一体化装置
CH706465A1 (de) * 2012-05-01 2013-11-15 Airlight Energy Ip Sa Rinnenkollektor mit einer Konzentratoranordnung.
CH706688A1 (de) * 2012-06-24 2013-12-31 Airlight Energy Ip Sa Absorberanordnung für einen Rinnenkollektor.
US20170350621A1 (en) * 2016-06-06 2017-12-07 Frontline Aerospace, Inc Secondary solar concentrator
US11739984B2 (en) * 2020-03-31 2023-08-29 The Florida State University Research Foundation, Inc. Solar energy collection system with symmetric wavy absorber pipe

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Also Published As

Publication number Publication date
CL2011001677A1 (es) 2012-04-09
CH700227A1 (de) 2010-07-15
ZA201105003B (en) 2012-03-28
US20120031095A1 (en) 2012-02-09
CN102292606A (zh) 2011-12-21
WO2010078668A3 (fr) 2010-09-23
WO2010078668A2 (fr) 2010-07-15

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