What is the difference expansion between turbine expander and valve throttle ?

透平式膨胀机和节流阀之间的膨胀有什么不同。

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The model of thermal expand valve is built and the connection of flux, pressure difference between the front and behind of the valve and cryogen dryness of inlet and outlet.

建立了热力膨胀阀模型，重点建立了流量与阀前后压差及制冷剂进出口干度的关系。

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When the pressure difference changes with time, a phase shift will occur between the transient pressure difference and displace of valve flap, which could cause leakage and even reverse flow.

当阀片两侧的压差随时间变化时，阀片的启闭与压差的变化之间存在一定的相位差，有可能引起泄漏甚至反向流动。

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But in an Arena study published online this week in the journal Circulation: Cardiovascular Imaging, evaluation of over 5, 200 patients in phase 3 trials of 52 weeks of lorcaserin (10 mg, twice daily) or placebo showed only a slight difference in heart valve problems: 2.04% for placebo and 2.37% for lorcaserin.

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There was no statistically significant difference in the development of FDA-defined valve abnormalities between Belviq and placebo-treated patients.

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On a conference call, Arena Chief Executive Jack Lief said that there were heart valve problems seen in the trial, but that in the end he expects no difference between Arena's drug and placebo when it comes to this side effect.

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