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    • 3. 发明授权
    • Joint-cycle high-efficiency fuel cell system with power generating turbine
    • 具有发电涡轮机的联合循环高效燃料电池系统
    • US06921595B2
    • 2005-07-26
    • US09870412
    • 2001-05-30
    • Lawrence G. ClawsonMark R. Hagan
    • Lawrence G. ClawsonMark R. Hagan
    • H01M8/06F02C3/22H01M20060101H01M2/00H01M8/00H01M8/04H01M8/12H01M8/18
    • H01M8/0612H01M8/04022H01M8/04089H01M2250/407Y02E60/563
    • The efficiency of a combination reformer/fuel cell system is significantly improved by recapturing the energy value of heat generated in the fuel cell and producing additional power. The cooling water from the fuel cell is mixed, entirely or in part, with sufficient or excess compressed air, and at least partially evaporates in the compressed air. The air is at least sufficient to support the oxidative reactions in the fuel cell and also to serve as oxidant in a burner that provides heat to reform fuel/steam mixtures into hydrogen-containing reformate. This air/steam mixture, after leaving the fuel cell, is further heated by heat exchange with the reformate stream and reformate-producing modules, and with the exhaust stream of the burner. The steam/air mixture is injected into the burner, optionally after superheating in the burner exhaust, and is reacted with fuel in the burner. The burner exhaust may be used to provide heat to a fuel reforming reaction. The high-temperature burner exhaust may also be used to drive an expander, preferably a turbine, at a location in the system which is downstream of the burner, but in which the exhaust is at a high temperature so as to run the turbine efficiently. The turbine recovers heat energy from the fuel cell as mechanical energy, typically in excess of the energy required to run a compressor, because of the addition of steam to the compressed air. Moreover, system heat removal elements, such as radiators, as well as overall system size and cost, can be markedly reduced for a given level of output.
    • 通过重新获得在燃料电池中产生的热量的能量值并产生额外的功率,组合重整器/燃料电池系统的效率显着提高。 来自燃料电池的冷却水全部或部分地与足够的或过量的压缩空气混合,并且在压缩空气中至少部分蒸发。 空气至少足以支持燃料电池中的氧化反应,并且还用作燃烧器中的氧化剂,燃烧器提供热量以将燃料/蒸气混合物重整成含氢重整产物。 离开燃料电池后的空气/蒸汽混合物通过与重整产物流和重整产生模块的热交换以及与燃烧器的排气流进一步加热。 将蒸气/空气混合物注入燃烧器中,任选地在燃烧器排气中过热后,与燃烧器中的燃料反应。 燃烧器排气可以用于向燃料重整反应提供热量。 高温燃烧器排气也可以用于在燃烧器下游的系统中的一个位置处驱动膨胀机,优选涡轮机,其中排气处于高温,以有效地运行涡轮机。 由于向压缩空气中加入蒸汽,涡轮机以机械能(通常超过运行压缩机所需的能量)恢复来自燃料电池的热能。 此外,对于给定的输出水平,系统除热元件(例如散热器)以及总体系统尺寸和成本可以显着降低。
    • 4. 发明授权
    • High-efficiency fuel cell power system with power generating expander
    • 具有发电扩张器的高效燃料电池电力系统
    • US06916564B2
    • 2005-07-12
    • US10335538
    • 2002-12-31
    • Lawrence G. ClawsonChristopher J. O'BrienMark R. Hagan
    • Lawrence G. ClawsonChristopher J. O'BrienMark R. Hagan
    • H01M20060101H01M2/00H01M2/02H01M8/00H01M8/04H01M8/06H01M8/10H01M8/12H01M8/14H01M8/18
    • H01M8/04022H01M8/04089H01M8/04111H01M8/04126H01M2008/1095H01M2250/402H01M2250/407Y02B90/12Y02E60/563
    • A hydrogen fuel cell power system having improved efficiency comprises a fuel cell, a source of hydrogen gas, a compressor for creating a pressurized air stream, and a liquid supply which is heated by waste heat form the power system and evaporates into the pressurized air stream to produce a pressurized air and steam mixture. The pressurized air/steam mixture, which is preferably used as the oxidant in the fuel cell, is combusted with fuel in a burner to produce a high-temperature steam-laden exhaust stream. The high-temperature steam-laden exhaust stream drives an expander to produce a power output, and a power take-off from the expander uses the expander power to, for instance, drive an electrical generator, or drive other system components. The evaporation of liquid can take place external to the fuel cell, or can take place directly within the fuel cell, preferably using a cooling liquid that is directly injected into the fuel cell. The fuel cell power system advantageously uses the low-temperature waste heat of the fuel cell to evaporate liquid into the pressurized air, resulting in a steam/air mixture having a relatively large expansion potential.The systems and related methods of the invention are applicable to a wide range of fuel cell power systems, including a “pure” or “non-hybrid” fuel cell power system, powered by hydrogen from either an external source, such as a hydrogen storage tank, or from “direct” reforming of a fuel at the anode. The invention is also applicable to integrated or “hybridized” fuel cell power systems which contain a local fuel reformer. In these systems, the fuel cell is powered by hydrogen-containing reformate generated by the reformer.
    • 具有提高效率的氢燃料电池电力系统包括燃料电池,氢气源,用于产生加压空气流的压缩机,以及由废热加热形成电力系统并蒸发成加压空气流的液体供应源 以产生加压的空气和蒸汽混合物。 优选用作燃料电池中的氧化剂的加压空气/蒸汽混合物在燃烧器中与燃料一起燃烧以产生高温蒸汽负载排气流。 高温蒸汽排气流驱动膨胀机以产生动力输出,并且来自膨胀机的动力输出使用膨胀机动力来例如驱动发电机或驱动其他系统部件。 液体的蒸发可以在燃料电池的外部进行,或者可以直接在燃料电池内进行,优选使用直接喷射到燃料电池中的冷却液。 燃料电池电力系统有利地使用燃料电池的低温余热将液体蒸发到加压空气中,导致具有相对较大膨胀电位的蒸汽/空气混合物。 本发明的系统和相关方法适用于各种各样的燃料电池电力系统,包括“纯”或“非混合”燃料电池电力系统,其由来自外部源的氢气供电,诸如氢存储 罐或从阳极“燃料”直接重整。 本发明也适用于含有局部燃料重整器的集成或“混合”燃料电池电力系统。 在这些系统中,燃料电池由重整器产生的含氢重整产物提供动力。
    • 6. 发明授权
    • Condensing furnace with submerged combustion
    • 冷凝炉具有浸没式燃烧
    • US5097802A
    • 1992-03-24
    • US621141
    • 1990-11-30
    • Lawrence G. Clawson
    • Lawrence G. Clawson
    • F22B1/26F24H1/10
    • F24H1/0045F22B1/26F24H1/107
    • A high efficiency furnace having a substantially continuous wet heat exchanger wherein such continuous wet operation is provided by raising the dew point of the combustion products by submerged combustion before introduction into said head exchanger. That is, a water holding reservoir is provided between the burner and the heat exchanger, and condensate flows from the heat exchanger back into the reservoir. The combustion products are drawn through the water in the reservoir by providing a partition having a submerged lower portion, and providing a pressure differential between the chambers on the two sides of the partition. The submerged passageway from one chamber to the other may preferably be a serrated bottom edge on the partition or a plurality of apertures in the partition. The pressure differential may be provided by using a combustion blower or alternatively, using an induced draft blower preferably disposed at the flue end of the heat exchanger. Also provided is a controller that continues to activate the blower for a predetermined time period after the fuel is shut off to the burner so that the heat exchanger is flushed with pure water condensate at the end of a burning cycle.
    • 一种具有基本上连续的湿式热交换器的高效率炉,其中通过在引入所述头部热交换器之前通过浸没燃烧提高燃烧产物的露点来提供这种连续的湿式操作。 也就是说,在燃烧器和热交换器之间设置储水容器,并且冷凝物从热交换器返回到储存器中。 燃烧产物通过提供具有浸没下部的分隔件并在分隔壁的两侧的室之间提供压力差而被抽吸在储存器中的水中。 从一个室到另一个室的浸没通道可优选地是分隔件上的锯齿形底部边缘或隔板中的多个孔。 压差可以通过使用燃烧鼓风机或替代地使用优选地设置在热交换器的烟道端处的感应式送风机来提供。 还提供了一种控制器,其在将燃料切断到燃烧器之后继续激活鼓风机预定的时间段,使得热交换器在燃烧循环结束时用纯水冷凝物冲洗。
    • 9. 发明授权
    • Recuperative clothes dryer with enhanced recirculation and air flow
    • 具有增强的再循环和空气流的再生衣物干燥器
    • US4665628A
    • 1987-05-19
    • US846549
    • 1986-03-31
    • Lawrence G. Clawson
    • Lawrence G. Clawson
    • D06F58/02F26B3/04F26B11/04
    • D06F58/02
    • A clothes dryer operating with a very high volume of air flow across the clothes thereby enabling a high percentage of air recirculation without sacrifice to drying time or efficiency. A cylindrical clothes drum is surrounded by an air tight casing. Radial perforations are formed along the entire cylindrical wall of the drum. Drying air is forced axially into the drum and radially expelled through the perforations. By expelling the air through the total area of all perforations, a high air flow is maintained without increasing exit velocity. The expelled air is drawn back between the drum and casing towards the drum air inlet. Over 80% of the expelled air is recirculated back into the drum resulting in expelled air having a high water vapor content. Consequently, the energy per pound of exhaust air is increased sufficiently to heat water for direct use in washing machines. In another embodiment, the high air flow is used to advantage with a lower percentage of recirculation to achieve reduced drying time.
    • 干衣机以大量的空气流动,穿过衣物,从而能够高比例的空气再循环,而不牺牲干燥时间或效率。 一个圆筒形的衣物桶被一个气密的外壳包围着。 径向穿孔沿滚筒的整个圆柱形壁形成。 干燥空气被轴向推入滚筒并通过穿孔径向排出。 通过排出空气通过所有穿孔的总面积,保持高空气流而不增加出口速度。 排出的空气在滚筒和壳体之间被抽回鼓筒进气口。 超过80%的排出的空气被再循环回到滚筒中,导致具有高水蒸汽含量的排出的空气。 因此,每磅废气的能量增加到足以加热水直接用于洗衣机。 在另一个实施方案中,高空气流以较低百分比的再循环利用,以实现减少的干燥时间。