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    Method of calculating radiation
    3.
    发明公开
    Method of calculating radiation 审中-公开
    Verfahren zur Strahlungsrechnung

    公开(公告)号：EP1349048A1

    公开(公告)日：2003-10-01

    申请号：EP03006233.5

    申请日：2003-03-20

    申请人： Hitachi, Ltd. ,  BABCOCK-HITACHI K.K.

    发明人： Yamamoto, Kenji ,  Itou, Osamu ,  Taniguchi, Masayuki ,  Okazaki, Hirofumi ,  Sakata, Taro

    IPC分类号： G06F1/16

    CPC分类号： G06F1/16

    摘要： The invention relates to a method, a storage medium and a computer system for calculating radiation.
    Conventionally, a coarse mesh having the same size, i.e., a calculation cell, was used regardless to whether the location is near or remote from radiation elements such as calculation cells and wall face elements. Therefore, it took very long calculation time to calculate an energy exchange between a remote location covered by a coarse mesh and a noted cell. Further, there were many non-influential cells for calculation in a location remote from a noted radiation element for radiation calculation, thus making the calculation accuracy low. The present invention provides a method of calculating radiation comprising a measure for completing the calculation rapidly while keeping the calculation accuracy high.
    Near at a calculation cell from which radiation energy is emitted or at a calculation cell P into which radiation energy is absorbed, a small (level 0) cell is used, and at a remote location from the calculation cell P, a large (level n) cell formed by combining plural small cells is used. Further, a largest calculation cell which comes into the field of view angle ΔΩ covered by a ray is selected. As a result, the accuracy of the radiation calculation is enhanced, the calculation time is shortened and the amount of memory necessary for the calculation can be reduced.

    摘要翻译： 本发明涉及一种用于计算辐射的方法，存储介质和计算机系统。 常规地，使用具有相同尺寸的粗网格，即计算单元，而不管该位置是靠近还是远离诸如计算单元和壁面元件的辐射元件。 因此，计算一个粗糙网格覆盖的远程位置和一个已知单元格之间的能量交换花费了很长的计算时间。 此外，在远离用于辐射计算的所述辐射元件的位置中存在许多用于计算的无影响的单元，从而使得计算精度低。 本发明提供了一种计算辐射的方法，其包括在保持计算精度高的同时快速完成计算的措施。 在发射辐射能量的计算单元或辐射能量吸收的计算单元P附近，使用小（0级）单元，并且在与计算单元P的远程位置处 使用通过组合多个小单元形成的大（n级）单元。 此外，选择进入由光线覆盖的视角DELTA OMEGA的最大计算单元。 结果，增强了辐射计算的精度，缩短了计算时间，并且可以减少计算所需的存储量。

    Solid fuel burner, burning method using the same, combustion apparatus and method of operating the combustion apparatus
    5.
    发明公开
    Solid fuel burner, burning method using the same, combustion apparatus and method of operating the combustion apparatus 有权
    固体燃料燃烧器，使用相同的，燃烧锅炉和用于其操作的方法的方法

    公开(公告)号：EP1312859A1

    公开(公告)日：2003-05-21

    申请号：EP02025073.4

    申请日：2002-11-12

    申请人： Hitachi, Ltd. ,  BABCOCK-HITACHI K.K.

    发明人： Okazaki, Hirofumi ,  Taniguchi, Masayuki ,  Tsumura, Toshikazu ,  Takahashi, Yoshitaka ,  Kuramashi, Kouji

    IPC分类号： F23D1/00

    CPC分类号： F23C6/045 ,  F23C7/004 ,  F23C7/008 ,  F23C2201/20 ,  F23C2900/06041 ,  F23D1/00 ,  F23D2201/10 ,  F23D2201/20 ,  F23D2209/20

    摘要： A solid fuel burner using a low oxygen concentration gas as a transporting gas of a low grade solid fuel such as brown coal or the like and a combustion method using the solid fuel burner are provided. The solid fuel burner comprises a means for accelerating ignition of the fuel and a means for preventing slugging caused by combustion ash from occurring. Mixing of fuel and air inside a fuel nozzle (11) is accelerated by that an additional air nozzle (12) and a separator (35) for separating a flow passage are arranged in the fuel nozzle (11), and the exit of the additional air nozzle (12) is set at a position so as to overlap with the separator (35) when seeing from a direction perpendicular to a burner axis, and additional air is ejected in a direction nearly perpendicular to a flow direction of a fuel jet flowing through the fuel nozzle 11. An amount of air from the additional air nozzle (12) is varied corresponding to a combustion load. By increasing the amount of air from the additional air nozzle (12) at a low load operation, an oxygen concentration of a circulation flow (19) formed in a downstream portion outside the exit of the fuel nozzle (11) is increased to stably burn the fuel. By decreasing the amount of air from the additional air nozzle (12) at a high load operation, a flame is formed at a position distant from the fuel nozzle (11) to suppress radiant heat received by structures of the solid fuel burner and walls of the furnace.

    摘要翻译： 提供如褐煤或类似物，并使用固体燃料燃烧器的燃烧方法，包括：使用低的氧浓度的气体为低等级的固体燃料的气体输送固体燃料燃烧器。 固体燃料燃烧器包括用于加速燃料的点火及防范猛击通过燃烧灰的发生引起的一种手段。 燃料和空气的燃料喷嘴（11）内的混合是通过做到额外的空气喷嘴（12）和用于分离的流动通道中的燃料喷嘴（11）被布置在分离器（35），和附加的出口加速 空气喷嘴（12）被设定在一位置，从而与所述分离器（35）当从一个方向看垂直于燃烧器轴线重叠，并且额外的空气被排出的方向几乎垂直于燃料喷射的流动的流动方向 通过燃料喷嘴11从附加空气喷嘴（12）的空气量而变化对应于燃烧负荷。 通过在燃料喷嘴的出口外的下游部形成的循环流（19）的氧浓度在低负荷操作从附加空气喷嘴（12）增加空气的量（11）提高到稳定燃烧 燃料。 通过在高负载操作降低空气从辅助空气喷嘴（12）的量，火焰在从燃料喷嘴（11）远离抑制由固体燃料燃烧器的结构和墙壁接收的辐射热的位置上形成 炉。