yangpeixian 发表于 2012-4-9 22:15:30

3m长的固定管板换热器不用折流板是不行的

壳侧的流量很大，壳侧的接管540mm，而你的壳内径才600mm，很不合理。

建议你先用设计模式进行计算。

new_maymay 发表于 2012-4-10 09:39:51

cdwenjian 发表于 2012-4-9 14:40 static/image/common/back.gif
干脆你直接把附件上传来看看算了，这样说不清楚，，，

附件重新上传了，麻烦帮我看看，谢谢。


new_maymay 发表于 2012-4-10 09:40:43

yangpeixian 发表于 2012-4-9 22:15 static/image/common/back.gif
3m长的固定管板换热器不用折流板是不行的

壳侧的流量很大，壳侧的接管540mm，而你的壳内径才600mm，很不 ...

我试着改了一下，裕度总是为负值。。。

yangpeixian 发表于 2012-4-11 22:07:10

new_maymay 发表于 2012-4-10 09:40 static/image/common/back.gif
我试着改了一下，裕度总是为负值。。。



Film (Boiling)The film-boiling regime occurs when the production of vapor at the heat transfer surface becomes so large that a continuous vapor film is present. The heat transfer coefficient drops dramatically, and nucleation stops. Boiling occurs at the interface between the bulk liquid and the continuous vapor film. The vapor film acts as an additional heat transfer resistance.
Film boiling occurs above a critical heat flux, which is calculated by HTRI programs and displayed on the monitors. In general, film boiling is not a desirable regime because of the low heat transfer coefficients and high wall temperatures, but it cannot always be avoided.


楼主，你查看 reports/tubeside monitor 最后一行，就是因为管侧 形成film boiling 导致管侧传热系数很小。

因此，冷热流体必须纯逆流换热。 你这个换热器尺寸很小就够了。

new_maymay 发表于 2012-4-12 12:28:41

yangpeixian 发表于 2012-4-11 22:07 static/image/common/back.gif
Film (Boiling)The film-boiling regime occurs when the prod ...

十分感谢 。   明白错误之处了。

new_maymay 发表于 2012-4-12 12:32:05

yangpeixian 发表于 2012-4-11 22:07 static/image/common/back.gif
Film (Boiling)The film-boiling regime occurs when the prod ...

你用的哪个版本的？ 为什么我没有你上面的那些提示啊。我用5.0

zhang330124 发表于 2012-4-5 14:10:12

回复内容看看附件

春笋 发表于 2012-4-5 14:10:12

不错，又占了一个沙发！

gaoxuejian2006 发表于 2012-4-5 14:10:12

cdwenjian 发表于 2012-4-6 09:35
上传一个氟利昂的例题吧，大家讨论学习一下。

谢谢分享！！
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查看完整版本: htri 管程传热系数太小