Louver for heat gain/loss calculation as well as air flow simulation?

RE: Louver for heat gain/loss calculation as well as air flow simulation?

Duncan Brown — Wed, 02 Apr 2014 09:52:55 GMT

With regards Steady State - air flow pathways are irrelevant as they only consider simple air flow changes as defined in the room data.

I have sent you a PM with a couple of queries on - could you please reply?

RE: Louver for heat gain/loss calculation as well as air flow simulation?

Michael Kwan — Mon, 31 Mar 2014 17:07:25 GMT

It would be for both. Because what I wanted to do as a next step is to also run the CFD simulations too.

Thanks.

RE: Louver for heat gain/loss calculation as well as air flow simulation?

Duncan Brown — Mon, 31 Mar 2014 08:18:10 GMT

Would this be for steady state calculations of for simulation?

RE: Louver for heat gain/loss calculation as well as air flow simulation?

Michael Kwan — Fri, 28 Mar 2014 20:13:55 GMT

I've tried using the transfer grille, but it didn't work. Upon further investigation, I realized that the transfer grille is only for internal partition only. It doesn't work for external air transfer. Is that correct?

Maybe could you provide a more detailed guidance for setting up the following scenario:

A rectangular single-floor, single-room building. There are four louvers at low level on a long wall. On the high level of the opposite wall, there are four openings for four propeller-type exhaust fans without louvers.

How do you model these two cases:

1. Natural ventilation. The fans are off.

2. Forced ventilation. The fans are on.

Thanks.

RE: Louver for heat gain/loss calculation as well as air flow simulation?

Duncan Brown — Thu, 27 Feb 2014 09:06:13 GMT

You should use the flowpath data options for setting up general airflows. Use opening window definitions purely for opening windows. The transfer grille option should suffice for setting up a louvre.

Please note that airflow paths and opening windows are not considered if you are running Steady State calculations (as seen in image). You need to run Simulation calculations to take advantage of airflow pathways.