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Author Topic: Pressure Relief Damper/Vent  (Read 2828 times)

wilsonobre

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Pressure Relief Damper/Vent
« on: November 17, 2014, 05:57:51 am »

Hi everyone!
I want to simulate a Pressure Relief Vent on Pyrosim! Which surface should i use?  Can you help me
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Charlie Thornton

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Re: Pressure Relief Damper/Vent
« Reply #1 on: November 17, 2014, 09:22:56 am »

You may be able to do what you want with an activation event for the vent based on a gas-phase device (pressure) with a set point.
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wilsonobre

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Re: Pressure Relief Damper/Vent
« Reply #2 on: November 18, 2014, 04:55:55 am »

Well Thank you Mr Thornton, I will use the control to ativate a vent! Thanks again
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Charlie Thornton

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Re: Pressure Relief Damper/Vent
« Reply #3 on: November 18, 2014, 09:00:54 am »

We (mostly Dan Swenson) looked into this a bit more after I posted and my answer was too simple. It turns out that you can't activate and deactivate an OPEN type vent. The correct solution appears to involve defining multiple pressure zones and then deactivating the wall that separates them when your pressure sensor triggers. Dan is working on an example and I'm hoping he'll share when it's done.

There also turns out to be an example case in the FDS Users Guide that describes a similar situation. It's on page 101, "Example Case: Breaking Pressure Zones".
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wilsonobre

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Re: Pressure Relief Damper/Vent
« Reply #4 on: November 19, 2014, 06:02:58 am »

Thank you again, I've seen that someone Posted on the Thunderhead Engineering News Page,
(http://www.thunderheadeng.com/2014/11/modeling-pressure-relief-vent/)
 Thank you for look again about this subject, I appreciate!
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