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板式冷却器厂家关于翅片厚度偏差引起的阻力偏差

2019-05-22

翅片厚度偏差虽然引起的单位传热面积差别不大,但对流体的流动阻力影响较大,BR板式冷却器易引起偏流。从而影响换热性能。现以下面一组数据来说明:同等规格(等翅高、等节距、同类型)翅片名义厚度为0·2 mm的铝箔,当材料厚度偏差为±0·03 mm时(根据GB/T 3880·1—2006标准要求),翅片流动阻力大小可相差19·63%;当材料厚度偏差为±0·015 mm时(根据HTA 2631—2008标准要求),空气板式冷却器翅片流动阻力大小可相差9·38%;当材料厚度偏差为±0·01 mm时,翅片流动阻力大小可相差6·16%。

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