CN111512482A - 具有燃料电池阵列、控制单元和动态电负载的用于生成电力的系统和方法 - Google Patents
具有燃料电池阵列、控制单元和动态电负载的用于生成电力的系统和方法 Download PDFInfo
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Abstract
基于从燃料源(110)提供的化学燃料(F)在燃料电池阵列(120)中产生电力。该电力经由输出端子(125)保持可用。传感器单元(130)记录传感器信号(VS),该传感器信号(VS)反映燃料电池阵列中的化学燃料(F)的消耗相对于被接收在燃料电池阵列(120)中的化学燃料(F)的量的程度。通过测量燃料电池阵列(120)中的至少一个电压(V1、…、Vn、VOUT)来监测燃料电池阵列(120)中的电力的产生。由燃料电池阵列(120)产生的电力的部分(PEF)被控制以被馈送到连接到输出端子(125)的动态电负载(150)中。响应于传感器信号(VS)控制被馈送到动态电负载(150)中的所述部分(PEF),使得被接收在燃料电池阵列(120)中的化学燃料(F)的量与产生电力时在燃料电池阵列(120)中消耗的化学燃料的量之间的差最小化。
Description
技术领域
本发明总体涉及基于燃料电池的电力的产生。更具体地,本发明涉及根据权利要求1的前序部分的系统和对应的方法。本发明还涉及计算机程序和非易失性数据载体。
背景技术
WO 2010/062251涉及用于便携式电子设备的电源。在此,该设计包括控制单元,该控制单元响应于燃料电池性能的变化并且被适配成在故障的情况下在一段时间内暂时停止或减小燃料电池电流。在燃料电池单元的出口处还设置有泄压阀。该阀被适配成响应于燃料电池单元内部的增大的压力而打开。限流器联接在燃料源与燃料电池单元之间。限流器被适配成在正常操作期间在燃料电池单元内提供低于阀的打开压力的压力。
关于燃料电池性能的任何改变,这种设计提供了期望的灵活性。然而,在将化学能转化成电能的处理中,仍存在改进整体效率的空间。
发明内容
因此,本发明的一个目的是提供一种高效的能量转换解决方案。
本发明的另一目的是提供一种用于产生电力的简单且安全的解决方案,其中,未消耗的氢逸出到周围环境中的风险被最小化。
根据本发明的一个方面,这些目的通过最初描述的控制系统来实现,其中,该系统包含动态电负载,该动态电负载连接到输出端子。控制单元被配置成接收传感器信号,并且响应于该传感器信号来控制由燃料电池阵列产生的电力中的、被馈送到动态电负载的部分。被馈送到动态电负载的上述部分使得被接收在燃料电池阵列中的化学燃料的量与产生电力时在燃料电池阵列中消耗的化学燃料的量之间的差最小化。
该系统是有利的,因为该系统以直接且可靠的方式处理暂时过剩的燃料。另外,在该处理期间无需将未使用的燃料释放到周围环境中。
根据本发明该方面的一个实施方式,该系统包括可控阀,该可控阀被布置成影响燃料电池阵列中接收的化学燃料的量。控制单元进一步被配置成响应于传感器信号来控制可控阀。由此,可以将输入到燃料电池阵列中的燃料的总输入设定到适当的水平。自然地,这减少了对动态电负载的需求。
根据本发明该方面的另一实施方式,燃料源包含燃料箱和化学反应器。燃料箱被配置成容纳用于化学反应的至少一种源物质,例如,氢氧化钠和水,化学反应器被配置成通过化学反应产生化学燃料,例如,氢气。以上提及的可控阀在此被布置在燃料箱与化学反应器之间用于至少一种源物质的通道中。因此,可控阀可以方便地控制被生成并传输到燃料电池阵列中的燃料的量。
根据本发明的该方面的又一实施方式,压力传感器被布置成产生反映化学反应器中的压力水平的压力信号。在此,控制单元被配置成进一步响应于压力信号来控制可控阀。另选地或除此之外,温度传感器可以被布置成产生反映化学反应器中的温度的温度信号;并且控制单元被配置成进一步响应于该温度信号来控制可控阀。由此,进一步基于压力和/或温度水平,可以朝着期望的强度控制上述处理。
根据本发明的该方面的进一步的实施方式,动态电负载包含可充电电池和/或超级电容器。这是有利的,特别是与电阻负载相比,因为这种动态电负载使得能够有效地存储生成的任何过量的电能以供以后使用。
根据本发明的该方面的另一实施方式,由控制单元测量的至少一个电压包括在燃料电池阵列中的多个燃料电池中的各个燃料电池上的相应的单独的电压。如果所述相应的单独的电压中的至少一个电压低于第一阈值电压,则控制单元在此特别地被配置成减少被馈送到动态电负载中的部分。另选地或除此之外,由控制单元测量的至少一个电压包含了在输出端子处的输出电压。在这种情况下,如果输出电压低于第二阈值电压,则控制单元被配置成减少被馈送到动态电负载的部分。因此,如果出于某种原因出现电压降,则被馈送到动态电负载的能量的量将减少。继而,这使得能够将输出电压平衡到相对稳定的值。
根据本发明的该方面的再一实施方式,控制单元被配置成通过改变流入动态电负载的电流的大小来控制电力的被馈送到动态电负载中的部分。例如,如果动态电负载包含不需要恒定电流的负载(诸如,锂离子电池),则这是一种方便的设计。因此进一步优选地是,控制单元包括开关模式直流-直流转换器,其中,开关频率和/或占空比可以由来自传感器单元的电压控制。
根据本发明的另一方面,上述目的是通过生成电力的方法来实现的,该方法包括:从燃料源向燃料电池阵列提供化学燃料;基于化学燃料在燃料电池阵列中产生电力,该电力经由输出端子保持可用;经由传感器单元记录传感器信号,该传感器信号反映燃料电池阵列中的化学燃料的消耗相对于被接收在燃料电池阵列中的化学燃料的量的程度;并且通过测量燃料电池阵列中的至少一个电压来监测燃料电池阵列中的电力的产生。此外,动态电负载连接到输出端子,并且该方法包括:接收传感器信号;以及响应于该传感器信号,控制由燃料电池阵列产生的电力中的、被馈送到动态电负载的部分。在此,被馈送到动态电负载的上述部分被控制,使得被接收在燃料电池阵列中的化学燃料的量与产生电力时在燃料电池阵列中消耗的化学燃料的量之间的差最小化。从上面参照所提出的控制系统的讨论中,该方法及其优选实施方式的优点是显而易见的。
根据本发明的进一步的方面,上述目的通过计算机程序来实现,该计算机程序可以加载到通信地连接到处理单元的非易失性数据载体中。该计算机程序包括软件,该软件用于当上述程序在处理单元上运行时执行上述方法。
根据本发明的另一方面,该目的是通过包含上述计算机程序的非易失性数据载体来实现的。
根据以下描述和从属权利要求,本发明的进一步的优点、有益特征和应用将变得显而易见。
附图说明
现在将借助于优选实施方式并参照附图更详细地解释本发明,该优选实施方式作为示例公开。
图1示出了根据本发明一个实施方式的系统的框图;以及
图2借助于流程图例示了根据本发明的一般方法。
具体实施方式
图1示出了所提出的系统的框图的示例。该系统包含燃料源110、燃料电池阵列120、传感器单元130、控制单元140和动态电负载150。
燃料源110被配置成提供化学燃料F。例如,为此,燃料源110可以包括燃料箱111和化学反应器117。燃料箱111被配置成容纳用于化学反应的至少一种源物质SS,化学反应器117被配置成通过化学反应产生化学燃料F。例如,源物质SS可以包括水(H2O)和氢氧化钠(NaOH);并且基于此,化学反应器117可以被配置成产生呈氢气(H2)形式的化学燃料F。优选地,可控阀115被布置在燃料箱111与化学反应器117之间用于至少一种源物质SS的通道中。由此,馈送到化学反应器117中的源物质SS的量可以由控制单元140经由控制信号Ctrl-F来改变。
燃料电池阵列120被配置成从燃料源110接收化学燃料F,并基于化学燃料F产生经由输出端子125保持可用的电力。燃料电池阵列120通常包含相对较大数量的燃料电池FC(比如,n+1个),该燃料电池FC被串联地布置在燃料电池组件中。在工作中,在各个燃料电池上产生相应的电压V1、...、Vn。
传感器单元130被定位在燃料电池组件中的最后一个燃料电池(在此为第(n+1)个电池)处,并且被配置成记录传感器信号VS,该传感器信号反映燃料电池阵列120中的化学燃料F的消耗相对于被接收在燃料电池阵列120中的化学燃料F的量的程度。燃料电池FC的串联布置意味着,如果在燃料电池组件中化学燃料F已经被完全消耗,则在最后一个燃料电池n+1之后没有剩余未消耗的燃料F。换句话说,在传感器单元130中,得出燃料电池阵列120中的化学燃料F的消耗程度是相对简单的任务。
控制单元140被配置成通过测量燃料电池FC上的相应的电压V1、…、Vn来监测燃料电池阵列120中的电力的产生。控制单元140还被配置成测量输出端子125处的输出电压VOUT,并且基于该输出电压VOUT控制化学能到电能的转换,如下文所述。
此外,控制单元140被配置成接收传感器信号VS,该传感器信号VS同样可以由电压表示。在这种情况下,控制单元140优选地包括开关模式直流-直流转换器,其中,开关频率和/或占空比(duty cycle)可以由来自传感器单元130的传感器信号VS表示的电压来控制。
在任何情况下,响应于传感器信号VS,控制单元140被配置成经由控制信号Ctrl-I控制由燃料电池阵列120产生的电力中的、要被馈送到动态电负载150的部分PEF。更精确地,控制单元140控制要被馈送到动态电负载150的这样的部分PEF,以使得被接收在燃料电池阵列120中的化学燃料F的量与产生电力时在燃料电池阵列120中消耗的化学燃料的量之间的差最小化。
优选地,控制单元被配置成通过改变流入动态电负载150中的电流的大小来控制(Ctrl-I)电力中的被馈送到动态电负载150的部分PEF。
如果动态电负载150包含可充电电池(例如,锂离子类型的)和/或所谓的超级电容器(即,其电容值明显高于其它电容器的高容量电容器,与电解电容器相比,超级电容器每单位体积或质量通常可以存储10倍至100倍多的能量,并且超级电容器承受的充电和放电循环比可充电电池多得多),则是进一步有利的。即,这些类型的蓄电单元在充电处理中不需要恒定电流。
优选地,控制单元140被配置成如果相应的单独的电压V1、…、Vn中的至少一个电压下降到第一阈值电压(比如,350mV)以下,则减少电力的被馈送到动态电负载150的部分PEF。因此,该部分PEF可以保持在适当水平。
类似地,如果输出电压VOUT下降到第二阈值电压(比如,300mv)以下,则控制单元140优选被配置成减少电力的被馈送到动态电负载150的部分PEF。
根据本发明的一个实施方式,控制单元140还被配置成,响应于传感器信号VS,经由控制信号Ctrl-F来控制可控阀115。因此,影响了被接收在燃料电池阵列120中的化学燃料F的量,使得足够然而不过量的化学燃料F被馈送到燃料电池阵列120中。
根据本发明的另一实施方式,压力传感器160被布置成产生反映化学反应器117中的压力水平的压力信号PS。控制单元140在此被配置成进一步响应于压力信号PS来控制可控阀115。由此,控制单元140可以将化学反应器117中的处理调节到期望的压力水平。此外,除此以外或作为其另选方式,温度传感器170可以被布置成产生反映化学反应器117中的温度的温度信号TS。这使得控制单元140能够将化学反应器117中的处理调节到适当的温度水平。
如果中央控制单元140被配置成以全自动的方式(例如,通过执行计算机程序)来实现上述过程,则通常是有利的。因此,控制单元140优选地通信地连接到存储计算机程序的存储单元143(即,非易失性数据载体),该存储单元143又包含软件145,该软件145用于当计算机程序在至少一个处理器147上运行时,使控制单元140中的至少一个处理器147执行上述动作。
为了总结,并参照图2中的流程图,我们现在将描述根据本发明的用于基于燃料电池生成电力的一般方法。这里假设燃料电池被布置在燃料电池阵列中。
在第一步骤210中,燃料电池阵列从燃料源接收化学燃料,例如,氢气。与步骤210并行,步骤220基于化学燃料在燃料电池阵列中产生电力。电力经由输出端子保持可用,并且动态电负载也连接到输出端子。
在步骤210中燃料电池阵列接收化学燃料的同时,并行步骤230记录化学燃料的消耗相对于被接收在燃料电池阵列中的化学燃料的总量的程度。在步骤230之后的步骤250检查在燃料电池阵列中是否存在过剩的化学燃料,即,接收到的燃料是否多于消耗的燃料。如果是,则遵循步骤270;否则,该过程循环回到步骤210。并且,在步骤270中,动态电负载增大,从而减小了被接收在燃料电池阵列中的化学燃料的量与燃料电池阵列中消耗的化学燃料的量之间的差。燃料电池阵列中的化学燃料的消耗相对于被接收在燃料电池阵列中的化学燃料的量的程度经由传感器信号(例如,表示燃料电池阵列的传感器单元中的电压)来监测。
类似地,在步骤220中在燃料电池阵列中产生电力期间;步骤240通过测量燃料电池阵列中的至少一个电压来监测这种产生。随后的步骤260检查是否至少一个电压低于至少一个阈值。如果是,则遵循步骤280;否则,该过程循环回到步骤220。在步骤280中,减小了动态电负载,从而允许被接收在燃料电池阵列中的化学燃料的较大比例通过输出端子被馈送出。
总而言之,在步骤250和260中进行的检查分别旨在控制由燃料电池阵列产生的电力中的要被馈送到动态电负载中的部分,使得被接收在燃料电池阵列中的化学燃料量与产生电力时在燃料电池阵列中消耗的化学燃料的量之间的差最小化。
上面参照图2描述的所有处理步骤以及步骤的任何子序列可以借助于经编程的处理器来控制。而且,尽管以上参照附图描述的本发明的实施方式包括处理器和在至少一个处理器中执行的处理,但是本发明因此还扩展到被适配成将本发明应用于实践的计算机程序、尤其是在载体上或载体中的计算机程序。该程序可以是源代码、目标代码以及介于源代码和目标代码之间的代码的形式(诸如,部分编译的形式),或者是适合用于实现根据本发明的处理的任何其它形式。该程序可以是操作系统的一部分,也可以是单独的应用。载体可以是能够承载程序的任何实体或设备。例如,载体可以包括存储介质,诸如,闪速存储器、ROM(只读存储器)(例如,DVD(数字视频/通用磁盘)、CD(光盘)或半导体ROM)、EPROM(可擦除可编程只读存储器)、EEPROM(电可擦除可编程只读存储器))或者例如软盘或硬盘的磁记录介质。此外,载体可以是可以经由电缆或光缆或通过无线电或通过其它装置来传送的可传输的载体,诸如,电信号或光信号。当程序被实施成可以通过电缆或其它设备或装置直接传送的信号时,载体可以由这种电缆或设备或装置构成。另选地,载体可以是其中嵌入有程序的集成电路,该集成电路被适配成执行相关处理或在执行相关处理中使用。
当在本说明书中使用时,术语“包括/包含”用于指定所陈述的特征、整数、步骤或部件的存在。然而,该术语不排除一个或更多个附加特征、整数、步骤或组件或其组的存在或附加。
本发明不限于附图中描述的实施方式,而是可以在权利要求的范围内自由地改变。
Claims (20)
1.一种用于生成电力的系统(100),所述系统包括:
燃料源(110),所述燃料源(110)被配置成提供化学燃料(F),
燃料电池阵列(120),所述燃料电池阵列(120)被配置成从所述燃料源(110)接收所述化学燃料(F),并基于所述燃料源(110)来产生经由输出端子(125)保持可用的电力,
传感器单元(130),所述传感器单元(130)被配置成记录传感器信号(VS),所述传感器信号(VS)反映所述燃料电池阵列(120)中的化学燃料的消耗相对于被接收在所述燃料电池阵列(120)中的化学燃料(F)的量的程度,以及
控制单元(140),所述控制单元(140)被配置成通过测量所述燃料电池阵列(120)中的至少一个电压(V1、…、Vn、VOUT)来监测所述燃料电池阵列(120)中的电力的产生,
其特征在于
所述系统(100)包括动态电负载(150),所述动态电负载(150)连接到所述输出端子(125),并且
所述控制单元(140)进一步被配置成接收所述传感器信号(VS),并响应于所述传感器信号(VS)来控制(Ctrl-I)由所述燃料电池阵列(120)产生的所述电力中的、要被馈送到所述动态电负载(150)中的部分(PEF),所述控制单元(140)控制要被馈送到所述动态电负载(150)中的这样的部分(PEF),这样的部分(PEF)使得被接收在所述燃料电池阵列(120)中的化学燃料(F)的所述量与产生所述电力时所述燃料电池阵列(120)中消耗的化学燃料的量之间的差最小化。
2.根据权利要求1所述的系统(100),所述系统(100)包括可控阀(115),所述可控阀(115)被布置成影响被接收在所述燃料电池阵列(120)中的化学燃料(F)的所述量,并且
所述控制单元(140)被配置成响应于所述传感器信号(VS)来控制(Ctrl-F)所述可控阀(115)。
3.根据权利要求2所述的系统(100),其中,所述燃料源(110)包括燃料箱(111)和化学反应器(117),所述燃料箱(111)被配置成容纳用于化学反应的至少一种源物质(SS),所述化学反应器(117)被配置成通过所述化学反应来产生所述化学燃料(F),所述可控阀(115)被布置在所述燃料箱(111)与所述化学反应器(117)之间用于所述至少一种源物质(SS)的通道中。
4.根据权利要求3所述的系统(100),所述系统(100)包括压力传感器(160),所述压力传感器(160)被布置成产生反映所述化学反应器(117)中的压力水平的压力信号(PS),并且
所述控制单元(140)被配置成进一步响应于所述压力信号(PS)来控制所述可控阀(115)。
5.根据权利要求3或4中的任一项所述的系统(100),所述系统(100)包括温度传感器(170),所述温度传感器(170)被布置成产生反映所述化学反应器(117)中的温度的温度信号(TS),并且
所述控制单元(140)被配置成进一步响应于所述温度信号(TS)来控制所述可控阀(115)。
6.根据前述权利要求中的任一项所述的系统(100),其中,所述动态电负载(150)包括可充电电池和超级电容器中的至少一者。
7.根据前述权利要求中的任一项所述的系统(100),其中,由所述控制单元(140)测量的所述至少一个电压(V1、…、Vn、VOUT)包括:
所述燃料电池阵列(120)中的多个燃料电池(FC)中的各个燃料电池上的相应的单独的电压(V1、…、Vn),并且所述控制单元(140)被配置成如果所述相应的单独的电压中的至少一个电压低于第一阈值电压,则减少被馈送到所述动态电负载(150)中的所述部分(PEF)。
8.根据前述权利要求中的任一项所述的系统(100),其中,由所述控制单元(140)测量的所述至少一个电压(V1、…、Vn、VOUT)包括:
在所述输出端子(125)处的输出电压(VOUT),并且所述控制单元(140)被配置成如果所述输出电压(VOUT)低于第二阈值电压,则减少被馈送到所述动态电负载(150)中的所述部分(PEF)。
9.根据前述权利要求中的任一项所述的系统(100),其中,所述控制单元被配置成通过改变流入所述动态电负载(150)中的电流的大小来控制(Ctrl-I)所述电力中的、被馈送到所述动态电负载(150)中的所述部分(PEF)。
10.根据前述权利要求中的任一项所述的系统(100),其中,所述控制单元(140)包括开关模式直流-直流转换器,其中,开关频率和占空比中的至少一者能够由来自所述传感器单元(130)的所述传感器信号(VS)所表示的电压来控制。
11.一种生成电力的方法,所述方法包括:
从燃料源(110)向燃料电池阵列(120)提供化学燃料(F),
基于所述化学燃料(F)在所述燃料电池阵列(120)中产生电力,所述电力经由输出端子(125)保持可用,
经由传感器单元(130)来记录传感器信号(VS),所述传感器信号(VS)反映所述燃料电池阵列中的化学燃料(F)的消耗相对于被接收在所述燃料电池阵列(120)中的化学燃料(F)的量的程度,并且
通过测量所述燃料电池阵列(120)中的至少一个电压(V1、…、Vn、VOUT)来监测所述燃料电池阵列(120)中的电力的产生,
其特征在于,一动态电负载(150)被连接到所述输出端子(125),并且所述方法进一步包括:
接收所述传感器信号(VS),并响应于所述传感器信号(VS)来
控制(Ctrl-I)由所述燃料电池阵列(120)产生的所述电力中的、要被馈送到所述动态电负载(150)中的部分(PEF),要被馈送到所述动态电负载(150)中的所述部分(PEF)被控制成使得被接收在所述燃料电池阵列(120)中的化学燃料(F)的所述量与产生所述电力时所述燃料电池阵列(120)中消耗的化学燃料的量之间的差最小化。
12.根据权利要求11所述的方法,其中,一可控阀(115)被布置成影响被接收在所述燃料电池阵列(120)中的化学燃料(F)的所述量,并且所述方法进一步包括:
响应于所述传感器信号(VS)来控制(Ctrl-F)所述可控阀(115)。
13.根据权利要求12所述的方法,其中,所述燃料源(110)包括燃料箱(111)和化学反应器(117),所述燃料箱(111)被配置成容纳用于化学反应的至少一种源物质(SS),所述化学反应器(117)被配置成通过所述化学反应来产生所述化学燃料(F),所述可控阀(115)被布置在所述燃料箱(111)与所述化学反应器(117)之间用于所述至少一种源物质(SS)的通道中。
14.根据权利要求13所述的方法,其中,一压力传感器(160)被布置成产生反映所述化学反应器(117)中的压力水平的压力信号(PS),并且所述方法进一步包括:
进一步响应于所述压力信号(PS)来控制所述可控阀(115)。
15.根据权利要求13或14中的任一项所述的方法,其中,一温度传感器(170)被布置成产生反映所述化学反应器(117)中的温度的温度信号(TS),并且所述方法进一步包括:
进一步响应于所述温度信号(TS)来控制所述可控阀(115)。
16.根据权利要求11至15中的任一项所述的方法,其中,所测量的所述至少一个电压(V1、...、Vn、VOUT)包括所述燃料电池阵列(120)中的多个燃料电池(FC)中的各个燃料电池上的相应的单独的电压(V1、...、Vn),并且所述方法进一步包括:
如果所述相应的单独的电压中的至少一个电压低于第一阈值电压,则减少被馈送到所述动态电负载(150)中的所述部分(PEF)。
17.根据权利要求11至16中的任一项所述的系统方法,其中,所测量的所述至少一个电压(V1、…、Vn、VOUT)包括在所述输出端子(125)处的输出电压(VOUT),并且所述方法进一步包括:
如果所述输出电压(VOUT)低于第二阈值电压,则减少被馈送到所述动态电负载(150)中的所述部分(PEF)。
18.根据权利要求11至17中的任一项所述的系统方法,其中,通过改变流入所述动态电负载(150)中的电流的大小来控制所述电力中的被馈送到所述动态电负载(150)中的所述部分(PEF)。
19.一种计算机程序(145),所述计算机程序(145)能够加载到通信地连接到处理单元(147)的非易失性数据载体(143)中,所述计算机程序(145)包括软件,所述软件用于当所述计算机程序(145)被在所述处理单元(147)上运行时执行根据权利要求11至18中的任一项所述的方法。
20.一种包含根据权利要求19所述的计算机程序(145)的非易失性数据载体(143)。
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PCT/SE2018/051082 WO2019083435A1 (en) | 2017-10-26 | 2018-10-23 | SYSTEM AND METHOD FOR GENERATING ELECTRIC POWER WITH A FUEL CELL NETWORK, CONTROL UNIT AND DYNAMIC POWER CHARGE |
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US20150050528A1 (en) * | 2012-03-13 | 2015-02-19 | Nissan Motor Co., Ltd. | Fuel cell system |
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GB0906885D0 (en) * | 2004-05-28 | 2009-06-03 | Idatech Llc | Utilization-based fuel cell monitoring and control |
CN101036259A (zh) * | 2004-08-23 | 2007-09-12 | 索尼株式会社 | 燃料电池、燃料电池的使用方法、燃料电池的阴极、电子装置、电极反应利用装置和电极反应利用装置的电极 |
EP2112707A1 (de) * | 2008-04-24 | 2009-10-28 | Howaldtswerke-Deutsche Werft GmbH | Verfahren zur Energieversorgung |
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