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    • 74. 发明公开
    • Optimum fin designs for downflow reboilers
    • Verbesserter RippenentwurffürabwärtsströmendeAufkocher
    • EP0952419A1
    • 1999-10-27
    • EP99302930.5
    • 1999-04-15
    • AIR PRODUCTS AND CHEMICALS, INC.
    • Sunder, SwaminathanHoughton, Patrick Allan
    • F28D9/00F28F3/02F25J3/00
    • F28F9/0268F25J3/04412F25J5/002F25J2250/04F25J2290/32F28D9/0068F28D2021/0033F28F3/025F28F2250/108
    • A plate-fin heat exchanger or downflow reboiler/condenser (6) has optimum heat transfer fin (28;36) dimensions to increase the efficiency of heat transfer between evaporating and condensing fluids such as cryogens ( e.g. , oxygen and nitrogen). The plate-fin heat exchanger has a plurality of heat transfer fins (28;36) disposed between neighbouring parting sheets of uniform fin height less than or equal to 0.20 inch (0.05 cm) and either or both (i) the fin frequency is greater than or equal to 25 in -1 (10 cm -1 ) and (ii) the fin thickness is less than or equal to 0.008 inch (0.02 cm). Such optimum fins are most effectively employed at least within the first heat transfer section (28A) downstream of the hardway distributor section of the evaporating stream passages and within the entire heat transfer section (36) between the inlet and outlet distributor sections of the condensing stream passages.
    • 板翅式热交换器或下流再沸器/冷凝器(6)具有最佳的传热翅片(28; 36)尺寸,以提高蒸发和冷凝流体(例如,氧气和氮气)之间的热传递效率。 板翅式热交换器具有多个传热翅片(28; 36),其布置在均匀翅片高度小于或等于0.20英寸(0.05cm)的相邻分离片之间,并且其中或之一或两者(i)翅片频率较大 (10cm -1)以上25以下,(ii)翅片厚度小于或等于0.008英寸(0.02cm)。 至少在蒸发物流通道的硬道分配器部分下游的第一传热部分(28A)内以及冷凝流入口和出口分配器部分之间的整个传热部分(36)内最有效地使用这种最佳散热片 通道。