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    • 5. 再颁专利
    • Optimized offset strip fin for use in compact heat exchangers
    • 用于紧凑型热交换器的优化偏移散热片
    • USRE35890E
    • 1998-09-08
    • US988405
    • 1992-11-30
    • Allan K. So
    • Allan K. So
    • F28F1/10F28F3/02F28F13/12
    • F28F1/105F28F3/027Y10S165/916
    • An offset strip fin for use in compact automotive heat exchangers is disclosed. The offset strip fin has multiple transverse rows of corrugations extending in the axial direction wherein the corrugations in adjacent rows overlap in order that the oil boundary layer is continually re-started. The fin dimensions have been optimized in order to achieve superior ratio of heat transfer to pressure drop along the axial direction. In one aspect, .�.an.!. .Iadd.a .Iaddend.compact concentric tube heat exchanger has an offset set strip tin located in an annular fluid flow passageway located between a pair of concentric tubes. The preferred range of lanced lengths is determined to be between 0.035" to 0.075" for periodically developed flow. Maintaining the lanced length in the regime of periodically developed flow is advantageous in that it gives a higher heat transfer coefficient than is achievable with fully developed flow. This also provides the added advantage that variations in the shape of the flow passages from the rectangular do not impact negatively on the heat transfer. .Iadd.The corrugations have top portions and bottom portions of the same width. The height of the corrugations is greater than this width. .Iaddend.
    • 公开了一种用于紧凑型汽车热交换器的偏移散热片。 偏移散热片具有在轴向方向上延伸的多个横向波纹,其中相邻行中的波纹重叠,以使油边界层不断重新启动。 已经优化了翅片尺寸以便实现传热与轴向压降的优良比例。 在一个方面,一种紧凑型同心管式热交换器具有位于位于一对同心管之间的环形流体流动通道中的偏移设定带状锡。 对于周期性发展的流,优选的长度的范围被确定在0.035“至0.075”之间。 在定期开发的流动状态下保持长度是有利的,因为它具有比在完全发达的流动下可实现的传热系数更高的传热系数。 这还提供了附加的优点,即来自矩形的流动通道的形状的变化不会对热传递产生负面影响。 波纹具有相同宽度的顶部和底部。 波纹的高度大于该宽度。
    • 10. 发明授权
    • Optimized offset strip fin for use in contact heat exchangers
    • 用于接触式热交换器的优化偏移散热片
    • US5107922A
    • 1992-04-28
    • US663414
    • 1991-03-01
    • Allan K. So
    • Allan K. So
    • F28F1/10F28F3/02
    • F28F1/105F28F3/027Y10S165/916
    • An offset strip fin for use in compact automotive heat exchangers is disclosed. The offset strip fin has multiple transverse rows of corrugations extending in the axial direction wherein the corrugations in adjacent rows overlap in order that the oil boundary layer is continually re-started. The fin dimensions have been optimized in order to achieve superior ratio of heat transfer to pressure drop along the axial direction. In one aspect, an compact concentric tube heat exchanger has an offset strip fin located in an annular fluid flow passageway located between a pair of concentric tubes. The preferred range of lanced lengths is determined to be between 0.035" to 0.075" for periodically developed flow. Maintaining the lanced length in the regime of periodically developed flow is advantageous in that it gives a higher heat transfer coefficient than is achievable with fully developed flow. This also provides the added advantage that variations in the shape of the flow passages from the rectangular do not impact negatively on the heat transfer.
    • 公开了一种用于紧凑型汽车热交换器的偏移散热片。 偏移散热片具有在轴向方向上延伸的多个横向的波纹排,其中相邻行中的波纹重叠,以使油边界层不断重新启动。 已经优化了翅片尺寸以便实现传热与轴向压降的优良比例。 在一个方面,紧凑型同心管热交换器具有位于位于一对同心管之间的环形流体流动通道中的偏移条翅片。 对于周期性发展的流,优选的长度的范围被确定在0.035“至0.075”之间。 在定期开发的流动状态下保持长度是有利的,因为它具有比在完全发达的流动下可实现的传热系数更高的传热系数。 这还提供了附加的优点,即来自矩形的流动通道的形状的变化不会对热传递产生负面影响。