CN101379350A - 用于太阳能吸收板的横截面可变的薄壁集流器 - Google Patents
用于太阳能吸收板的横截面可变的薄壁集流器 Download PDFInfo
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- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
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- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
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- 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
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
- F24S10/74—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the tubular conduits are not fixed to heat absorbing plates and are not touching each other
- F24S10/742—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the tubular conduits are not fixed to heat absorbing plates and are not touching each other the conduits being parallel to each other
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- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
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- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
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- F28F21/081—Heat exchange elements made from metals or metal alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
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- Y02E10/00—Energy generation through renewable energy sources
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- 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
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- 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
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- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S165/00—Heat exchange
- Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
- Y10S165/471—Plural parallel conduits joined by manifold
- Y10S165/489—Two piece header structure
Abstract
本发明涉及用于一种用于太阳能吸收板的横截面可变的薄壁集流器,以镍基超级合金制造,并由薄壁主体(18)和多个管嘴(16、21)形成。集流器(10)连接到一系列接合管嘴(16),其中各太阳能吸收管(14)连接到这些接合管嘴;以及至少一个入口或出口管嘴(21),至少一个馈送管连接到该入口或出口管嘴。主体(18)可以为纺锤形,或者可以由两个以较大基部接合在一起的截头圆锥区段形成,并且可以进一步在所述入口或出口管嘴(21)的高度处具有中部柱状区段。该集流器尤其适用于在太阳能板中汇集高温流体。
Description
技术领域
本发明涉及一种集流器(header)设计,更具体地说,涉及用来分布和汇集太阳能吸收板的太阳能吸收管的集流器设计,所述太阳能吸收管属于太阳能中央收集器,通常具有熔融的盐,但是也可以采用其他高温转移流体。
背景技术
横截面不变的薄壁柱状集流器以前已经用在太阳能吸收管的熔融盐接收面板中,太阳能吸收管借助机加工衬套和管嘴连接到所述集流器,这些衬套和管嘴接下来焊接到所述柱状集流器。有时直接从所述柱状集流器挤压出所述管嘴。这些实施例可见于美国专利US6,736,134B2或其PCT申请WO03/021159A2版本中。
这种结构中的一些使得接合集流器主体与太阳能吸收管的接合区域承受较高的热应变,特别是在盐流速较低的集流器侧部区域。这种热应变是由于流经所述集流器的熔融盐集群通过太阳能电厂的定日镜场而引起的温度快速变化所导致的。可以通过在将所述太阳能吸收管接合到所述集流器的接合管嘴中放置套筒或其他热保护件来减小这种源于温度突变的应变。但是,这种热保护件具有难于生产且难于装配的几何形状,这样将提高生产和检测难度,并且使得这些过程代价高昂。如果没有这些保护件,则设备的使用寿命将极其短暂。
另一方面,柱状集流器要求最小的横截面通流面积,以便以最小的压力损失将盐流或转移流体流均匀分布到连接所述集流器的全部太阳能吸收管中。但是,众所周知,在整个集流器中,盐流或转移流体流并不均匀,并且这种可变流动分布取决于集流器上所述管或者馈送管连接部的结构或者分布盐或转移流体的太阳能吸收管的结构。
横截面不变的柱状集流器基本上在中部进行馈送,随着流体经过连接在集流器中部的太阳能吸收管进行分布,转移流体的流速在其侧部区域大幅降低,这在太阳能吸收管与集流器侧部连接的同时,导致在接合管嘴中产生严重预过渡(pre-transient)热应变。
这种横截面不变的柱状集流器结构在那些远离集流器馈送管的地方并不优化,集群过渡所产生的热应变结合所述集流器作为承压容器而必须吸收的机械应力,导致主体壁厚比所希望的壁厚要大,由于在所述集流器接合到所述太阳能吸收管的接合管嘴处引发的热应变,所以这也具有破坏性。
发明内容
因此,本发明的主要目的是提供一种集流器结构,其可以用在具有熔融盐或者任何其他转移流体的太阳能接收板中,在所述集流器接合到所述太阳能吸收管的接合管嘴处能更为有效地抵御热应变,而不需要使用复杂昂贵的热保护设备。
本发明的另一项目的在于提供一种集流器结构,用于具有熔融盐或任何其他转移流体的太阳能接收板中,允许在该集流器的主体中使用薄壁,以使用于接合太阳能吸收管的接合管嘴更好地符合这些管的较薄厚度。
本发明的另一项目的在于提供一种集流器结构,用于具有熔融盐或任何其他转移流体的太阳能吸收板中,允许对连接的全部管使用相同的集流器-太阳能吸收管接合管嘴构思,包括那些位于盐或转移流体流量高的集流器区域和流量低的区域中的接合管嘴,而且在制造和成本方面存在附带的优势。
前述和其他目的通过薄壁集流器来实现,该集流器通常具有较小的最大直径以及可变横截面。
必须从能够用来制造集流器和太阳能吸收管的可能材料中进行选材,这些材料在高于600℃的高温下具有良好的性质,即机械强度较高、热疲劳强度高、抗蠕变强度高、在高温且承受应变的情况下对硝酸盐或所用转移流体的耐腐蚀性好、热膨胀系数较低以使热变形引起的载荷降低,并且可以焊接,可以塑形而且还比较常用。在这一方面,镍基超级合金,诸如Inconel625等,是良好的选择。
集流器组件包含了挤压或机加工并后续焊接的接合管嘴,用于通过太阳能吸收管分布和汇集熔融盐或所用的转移流体,它们全部都优选以镍基超级合金制造。所述集流器还包含至少一个入口或出口管嘴,将集流器的主体连接到至少一个馈送管。集流器主体不是横截面不变的柱状,而是具有可变的横截面,在接合到所述管的接合区段或接合到所述馈送管的接合区段横截面最大,而随着集流器区段远离所述馈送管或所述管而横截面逐渐减小。
集流器的重要功能是在太阳能吸收管内以最小压力损失均匀分布盐流或转移流体流。为此,具有优势的是让集流器馈送管的通流面积至少等于连接到集流器的太阳能吸收管的通流面积的总和。如果不是用一个馈送管来供给集流器,而是使用多于一个馈送管,则馈送管通流面积总和必须至少等于连接到集流器的太阳能吸收管的通流面积总和。
集流器主体的最大横截面位于用于接合到馈送管的接合区域内,至少等于连接到集流器的太阳能吸收管的通流面积总和的1.5倍。集流器主体的剩余横截面随着集流器从供给集流器的馈送管或管离开而逐渐减小,遵循特定变化规律,但是优选变化梯度最大,这样允许通过可行的制造工艺将所连接的太阳能吸收管的全部接合管嘴收容到集流器内,并且允许借助自动轨迹焊将全部这些管接合到它们各自的管嘴。集流器侧部或端部区域是较难满足这些条件的区域,因为存在通流面积最小的区域,因此它们限定了不同的梯度。
相对于横截面不变且尺寸与可变集流器的最大横截面相同的集流器而言,横截面可变的集流器提供的优势在于:
可变集流器允许更大程度地改善接合在其上的太阳能吸收管内的流动分布,由于横截面通流面积较小而增大了集流器侧部区域内的盐流或转移流体流的流速,因此在集流器-管接合管嘴内降低了相对于过渡状态而产生的热应变,并且由于上述横截面通流面积减小所以降低了这些区域的机械压应力,这样明显降低了相对于相同压力载荷所产生的应变。
从这些优势可以派生出相关的优势,集流器整体横截面通流面积减小的程度越大,这些优势理论上越大,这些优势包括限定更薄的壁厚的可能性以及针对本发明的集流器主体进行优化,使得在使用该集流器的太阳能电厂的定日镜场中发生集群过渡过程的时候,该集流器主体能承受盐流速或转移流体流速较低的集流器区域内所遭受的严重热应变。
得益于其优势的影响,本发明的另一项优势在于,对于全部与集流器连接的管来说,能够对将集流器接合到太阳能吸收管的接合管嘴限定为相同的构思,明显带来制造和成本方面的优势,而且对于盐或转移流体流速较低的集流器区域内的管嘴,不需要使用其他复杂的设计或者复杂昂贵的热保护设备。
其他额外优势是因直径较小而减小了闭合集流器的盖板的厚度,本发明允许这种厚度减小。
通过实施例,并考虑到该实施例中仅由中部管来供给集流器,所以在本发明的物理实施例中,可变横截面使得集流器呈纺锤形。在本发明的另一个物理实施例中,横截面变化梯度恒定,使得集流器包括两个借助较大基部接合起来的截头圆锥区段。
在本发明另一种物理实施例中,连接馈送管的集流器的主体的中部区域保持柱状以便于制造,而在该连接部的出口处立即变成可变横截面。
在任何情况下,集流器整体横截面尽可能减小,但是受到可行的制造工艺的制约,该可行的制造工艺允许将其连接的太阳能吸收管的全部接合管嘴收容到集流器中并且通过焊接接合在其上。
作为尺寸参考,考虑了太阳能吸收管厚度较薄而且这些管彼此并排布置在太阳光线入射平面上形成接收板,集流器长度大约等于所连接的太阳能吸收管的总数乘以这些管的平均直径。
根据前述限定的最大横截面,集流器最大直径的最小值为太阳能吸收管平均直径乘以太阳能吸收管数1.5倍的平方根,并且集流器最小直径与其最大直径之间的比率(该比率尽可能最大)随着集流器长度变大而增大,或者换句话说,随着集流器连接的太阳能吸收管数增多,根据直径比率,较大的横截面增多。
这样,本发明的集流器更为有利,因为集流器必须较大,以连接更多的太阳能吸收管,并且较之以前研制的集流器,本发明为集流器主体提供了更薄更优化的厚度,这样在热力学上更好地符合所连接的太阳能吸收管的较薄厚度,使得温度梯度较小,因此在集群流通过程中在盐或转移流体中引发严重温度过渡过程的时候,在集流器-管接合管嘴内产生的热应变较小。这样,较之以前研制的集流器-管组件而言,显著延长了本发明集流器-管组件的寿命。
本发明不再需要在盐或转移流体流速较低的集流器区域内的管嘴中使用昂贵复杂的热保护件,而且相对于流速较高、工作条件较好的区域内的管嘴来说,不再需要为流速较低的区域内的管嘴限定不同的管嘴设计。
附图说明
全部已经论述的特征以及其他作为本发明特性的特征,如果它们包含在权利要求书中,则将从以下参照附图的说明中得到更好的理解,附图中示出了作为非限制性示例给出的可能实施例。
附图中:
图1示出了属于中央接收器的太阳能吸收管的局部横截面侧视图,带有根据本发明形成的集流器;
图2示出了纺锤形、横截面可变的集流器的正视图;
图3示出了图2所示的平面图;
图4示出了图2所示集流器的剖面图;
图5示出了由锥形截锥体形成的横截面可变的集流器的正视图;
图6示出了带有两个入口的横截面可变的集流器的正视图,其中横截面最大并与馈送管连接的中部区域为柱状区段,所述柱状中部区域也可以适用于纺锤形集流器。
具体实施方式
图1示出了本发明优选物理实施例的集流器10组件的侧视图,该组件布置在太阳能吸收板12内侧。太阳能吸收板12由一系列彼此平行并借助接合管嘴16接合的太阳能吸收管14形成,所述接合管嘴16用于接合集流器10的主体18。
集流器10组件由横截面可变的主体18和闭合侧盖19形成,它们在图2至6中示出。管14优选对焊在接合管嘴16上。
熔融盐或者所用的转移流体通过接合到该集流器10的入口管嘴和出口管嘴21进出太阳能吸收板。熔融盐或转移流体吸收定日镜(heliostat)场(未示出)反射到管14上的太阳能辐射22的热能。
所述集流器组件用来将加热的盐或流体分布到太阳能吸收管14,或从其汇集盐或流体。除了来自定日镜场的太阳能辐射22所入射的面板表面之外,所述板组件利用热保护件23隔离,以改善该组件的热效率。
图2、3和4分别以正视图、平面图和剖面图分别图示出了根据本发明优选物理实施例,形状为纺锤形的横截面可变的集流器10。所述管嘴,包括入口管嘴和出口管嘴21以及用于接合到太阳能吸收管的接合管嘴16,优选在横截面可变的集流器10的主体18上直接挤压出来。在使用焊接管嘴的情况下,后者进行塑形和加工之后,将它们插入集流器主体18制作的现有孔中,然后进行焊接。
太阳能吸收管14优选对焊到各接合管嘴16。集流器组件的可靠性很大程度上取决于这些元件的焊接件,因此,自动化的过程越多,则集流器10越可靠。
尽可能减小集流器10整体的横截面,受到可行的制造工艺制约,该生产条件允许在集流器10的主体18侧部或端部区域内通过优化分布来收容其所连接的太阳能吸收管14的全部接合管嘴16,并且还受到通过焊接将集流器10组件接合到太阳能吸收管14的加工过程的制约。
图5示出了根据本发明另一种物理实施例,横截面可变的集流器10的视图。在该实施例中,横截面变化梯度恒定,以使集流器10包括共用较大基部的两个截头圆锥区段。
图6示出了根据部本发明另一物理实施例,横截面可变的集流器10的视图。其中,连接馈送管的集流器10的主体18的中部区域维持柱状,以便于生产,而在连接部的出口处立即变成可变结构。
虽然参照示于图中的实施例论述并解释了本发明,但是本领域技术人员应该理解,可以对所述实施例的形状和细节进行若干改动,而且不会改变要求保护的本发明的精神和范围。
Claims (6)
1.一种用于太阳能吸收板的横截面可变的薄壁集流器,以镍基超级合金制造,用于分布和汇集熔融硝酸盐或任何其他高温流体,由以下形成:主体(18);多个遍布所述主体(18)分布的接合管嘴(16),这些接合管嘴将所述主体连接到太阳能吸收管(14);和将所述主体(18)连接到至少一馈送管的至少一入口或出口管嘴(21),其特征在于,所述主体(18)具有可变的横截面,从横截面最大的中部区域持续减小,直到到达所述主体(18)的端部区段,所述至少一个入口或出口管嘴(21)的轴线位于所述中部区域内。
2.如权利要求1所述的集流器,其特征在于,所述集流器(10)的主体(18)采用纺锤形。
3.如权利要求1所述的集流器,其特征在于,所述集流器(10)的主体(18)采用两个截头圆锥元件以其较大基部相对的形式。
4.如权利要求1至3任一项所述的集流器,其特征在于,所述集流器(10)的主体(18)的横截面最大的中部区域由柱状区段构成。
5.如权利要求1至3任一项所述的集流器,其特征在于,所述集流器(10)的主体(18)的横截面最大的中部区域由垂直于所述主体轴线的平面限定。
6.如权利要求1至5任一项所述的集流器,其特征在于,
用于供给所述集流器(10)的所述馈送管的通流面积总和至少等于与所述集流器(10)连接的全部太阳能吸收管(14)的通流面积;
所述集流器(10)的主体(18)的最大通流面积至少等于连接它的全部太阳能吸收管(14)的通流面积的1.5倍。
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ESP200600221 | 2006-02-01 | ||
ES200600221A ES2263394B1 (es) | 2006-02-01 | 2006-02-01 | Colector de seccion transversal variable y pared delgada para paneles de absorcion solar. |
PCT/EP2007/000806 WO2007088031A1 (en) | 2006-02-01 | 2007-01-31 | Thin wall header with a variable cross-section for solar absorption panels |
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CN101379350A true CN101379350A (zh) | 2009-03-04 |
CN101379350B CN101379350B (zh) | 2011-11-16 |
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US (1) | US8186341B2 (zh) |
EP (1) | EP1979688B1 (zh) |
CN (1) | CN101379350B (zh) |
AT (1) | ATE537413T1 (zh) |
AU (1) | AU2007211610B2 (zh) |
CY (1) | CY1112627T1 (zh) |
ES (2) | ES2263394B1 (zh) |
IL (1) | IL193008A (zh) |
MA (1) | MA30230B1 (zh) |
PT (1) | PT1979688E (zh) |
WO (1) | WO2007088031A1 (zh) |
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CN104024731A (zh) * | 2011-12-21 | 2014-09-03 | 阿尔斯通技术有限公司 | 形状优化集管及其制造方法 |
CN104024731B (zh) * | 2011-12-21 | 2017-01-18 | 通用电器技术有限公司 | 形状优化集管及其制造方法 |
Also Published As
Publication number | Publication date |
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AU2007211610A2 (en) | 2009-04-23 |
US8186341B2 (en) | 2012-05-29 |
CN101379350B (zh) | 2011-11-16 |
IL193008A (en) | 2012-04-30 |
CY1112627T1 (el) | 2016-02-10 |
ATE537413T1 (de) | 2011-12-15 |
MA30230B1 (fr) | 2009-02-02 |
ZA200806552B (en) | 2009-11-25 |
ES2263394A1 (es) | 2006-12-01 |
IL193008A0 (en) | 2009-02-11 |
AU2007211610B2 (en) | 2011-08-11 |
US20090250051A1 (en) | 2009-10-08 |
ES2263394B1 (es) | 2007-11-16 |
WO2007088031A1 (en) | 2007-08-09 |
EP1979688B1 (en) | 2011-12-14 |
AU2007211610A1 (en) | 2007-08-09 |
ES2378485T3 (es) | 2012-04-13 |
PT1979688E (pt) | 2012-03-08 |
EP1979688A1 (en) | 2008-10-15 |
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