Search found 40 matches

Geert,

You're right..It says mechanical + natural ventilation + Inf.. And since there is no energy consumption, the ac/h is only through nat. vent although it gets listed as mechanical + nat. vent ...

when I go to the Grid display instead of the graph display, I can see mechanical ventilation listed in it..

Please find the model attached.

Thanks,

Hi,

I have been doing a natural ventilation analysis for a simple box having cross ventilation. I am using the calculated option, operable windows and have turned off the mechanical heating/cooling ...

Please find attached the small scale model.

I dont get any error messages.

I do not see air flow through the window openings in a calculated natural ventilation option. When I increase the scale of the model under the same settings, it show ...

Thank you for the reply.

Could you let me know the equation that Energy Plus uses to calculate air flow through vent using Cd..

Big models do not seem like a problem. I am able to model them.

But my question was about small model. I am not able to simulate air flow in very small model of the size I mentioned in the post ear ...

hi,

What is the discharge coefficient considered by the program for calculating air flow through windows? Is there a way to change it?

Hi,

I made a model of the size 10" (h)x10"(w) x 20"(l) long model with openings and calculated natural ventilation options. I could not see the air flow through the window. But when I increase the ...

Steve,

I tried refining the grid. Bu the aspect ratio increases a lot. I see that the grid has to be changed along the entire length or width of the model which increases the complexity and also re ...

Hello,

Sorry, I had one more question that I forgot to include in my earlier post.

While setting up the CFD External Analysis, the wind speed was set as 980fpm. Then why would the velocity of th ...

Hello,

I made a model with louvers using component blocks to do an external CFD analysis. (image attached)
I went ahead with the default CFD grid. The CFD simulations went upto 2500 iterations and ...

Hello,

I tried editing the default CFD grid around an area of interest in my model. I used the uniform grid spacing.

But the space only gets divided in one direction. How do I divide the grid a ...

Andy,

I followed the steps 1-4.. Still no success..

In the end, tried installing it in safe mode and it worked. so now it is up and running.

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