Revision history [back]

Hi everyone, I'm new to all this building energy modeling thing and I've got some doubts while creating my model. I'm modeling a real building and my objective is to simulate a green roof on it and evaluate if this modification can reduce the total eletric consumption (decreasing the use of the ACs).

I thought I should use the FullInteriorlandExterior option, and for that I created all my spaces with a convex geometry. But, many rooms got split up in many pieces, so I assigned Air Walls for the 'openings'. I've read that it transforms it into a Drywall material, so the heat is transfered, but not airflow. So I thought of using the "ZoneCrossMixing" to allow that.

My questions are:

1. Should I really use the ZoneCrossMixing and Air Walls to represent this openings? That way I would let them be two different thermal zones.

2. Should I merge the two spaces into one thermal zone? I was really afraid of all the possible problems of using Internal Mass.

3. Is there really a huge difference in results between FullExterior and FullInteriorandExterior? Should I forget all of the above and just use FullExterior?

I'm sorry for all these subjective questions, I have just come to a dead-end, so I thought I could use an expert advice :)

P.S: before anyone questions, this simulation is part of my thesis, but I really wanted to make it as precise as possible, since the building being simulated is from the company I am currently an Intern in ;D

Hi everyone, I'm new to all this building energy modeling thing and I've got some doubts while creating my model. I'm modeling a real building and my objective is to simulate a green roof on it and evaluate if this modification can reduce the total eletric consumption (decreasing the use of the ACs).

I thought I should use the FullInteriorlandExterior option, and for that I created all my spaces with a convex geometry. But, many rooms got split up in many pieces, so I assigned Air Walls for the 'openings'. I've read that it transforms it into a Drywall material, so the heat is transfered, but not airflow. So I thought of using the "ZoneCrossMixing" to allow that.

My questions are:

1. Should I really use the ZoneCrossMixing and Air Walls to represent this openings? That way I would let them be two different thermal zones.

2. Should I merge the two spaces into one thermal zone? I was really afraid of all the possible problems of using Internal Mass.

3. Is there really a huge difference in results between FullExterior and FullInteriorandExterior? Should I forget all of the above and just use FullExterior?

I'm sorry for all these subjective questions, I have just come to a dead-end, so I thought I could use an expert advice :)

P.S: before anyone questions, this simulation is part of my thesis, but I really wanted to make it as precise as possible, since the building being simulated is from the company I am currently an Intern in ;D

Hi everyone, I'm new to all this building energy modeling thing and I've got some doubts while creating my model. I'm modeling a real building and my objective is to simulate a green roof on it and evaluate if this modification can reduce the total eletric consumption (decreasing the use of the ACs).

I thought I should use the FullInteriorlandExterior option, and for that I created all my spaces with a convex geometry. But, many rooms got split up in many pieces, so I assigned Air Walls for the 'openings'. I've read that it transforms it into a Drywall material, so the heat is transfered, but not airflow. So I thought of using the "ZoneCrossMixing" to allow that.

My questions are:

1. Should I really use the ZoneCrossMixing and Air Walls to represent this openings? That way I would let them be two different thermal zones.

2. Should I merge the two spaces into one thermal zone? I was really afraid of all the possible problems of using Internal Mass.

3. Is there really a huge difference in results between FullExterior and FullInteriorandExterior? Should I forget all of the above and just use FullExterior?

I'm sorry for all these subjective questions, I have just come to a dead-end, so I thought I could use an expert advice :)

P.S: before anyone questions, this simulation is part of my thesis, but I really wanted to make it as precise as possible, since the building being simulated is from the company I am currently an Intern in ;D

Hi everyone, I'm new to all this building energy modeling thing and I've got some doubts while creating my model. I'm modeling a real building and my objective is to simulate a green roof on it and evaluate if this modification can reduce the total eletric consumption (decreasing the use of the ACs).

I thought I should use the FullInteriorlandExterior option, and for that I created all my spaces with a convex geometry. But, many rooms got split up in many pieces, so I assigned Air Walls for the 'openings'. I've read that it transforms it into a Drywall material, so the heat is transfered, but not airflow. So I thought of using the "ZoneCrossMixing" to allow that.

My questions are:

1. Should I really use the ZoneCrossMixing and Air Walls to represent this openings? That way I would let them be two different thermal zones.

2. Should I merge the two spaces into one thermal zone? I was really afraid of all the possible problems of using Internal Mass.

3. Is there really a huge difference in results between FullExterior and FullInteriorandExterior? Should I forget all of the above and just use FullExterior?

I'm sorry for all these subjective questions, I have just come to a dead-end, so I thought I could use an expert advice :)

P.S: before anyone questions, this simulation is part of my thesis, but I really wanted to make it as precise as possible, since the building being simulated is from the company I am currently an Intern in ;D

Hi everyone, I'm new to all this building energy modeling thing and I've got some doubts while creating my model. I'm modeling a real building and my objective is to simulate a green roof on it and evaluate if this modification can reduce the total eletric consumption (decreasing the use of the ACs).

I thought I should use the FullInteriorlandExterior option, and for that I created all my spaces with a convex geometry. But, many rooms got split up in many pieces, so I assigned Air Walls for the 'openings'. I've read that it transforms it into a Drywall material, so the heat is transfered, but not airflow. So I thought of using the "ZoneCrossMixing" to allow that.

My questions are:

1. Should I really use the ZoneCrossMixing and Air Walls to represent this openings? That way I would let them be two different thermal zones.

2. Should I merge the two spaces into one thermal zone? I was really afraid of all the possible problems of using Internal Mass.

3. Is there really a huge difference in results between FullExterior and FullInteriorandExterior? Should I forget all of the above and just use FullExterior?

I'm sorry for all these subjective questions, I have just come to a dead-end, so I thought I could use an expert advice :)

P.S: before anyone questions, this simulation is part of my thesis, but I really wanted to make it as precise as possible, since the building being simulated is from the company I am currently an Intern in ;D