Anthropogenic heat flux input for BEP+BEM

[MariaCharaKarypidou]

Hello,

Is there a way to provide input data with regards to the anthropogenic heat flux associated with each local climate zone type? That would be particularly helpful in cases that the sf_urban_physics = 3 (BEP+BEM) is used.

Many thanks, Maria

[matthiasdemuzere]

The ingestion of the LCZ information does not interfere with the anthropogenic heat flux (initialization). Perhaps @andreazonato can provide more context here??

[andreazonato]

Hi @MariaCharaKarypidou ,

At the state of the art, BEP+BEM cannot ingest anthropogenic heat flux. So it is not linked to the LCZs. I guess you should modify the code (and therefore the URBPARM_LCZ.TBL) to make it possible.

Andrea

[MariaCharaKarypidou]

Hi Andrea,

Thank you for your reply!

So, in the case of sf_urban_physics = 3, the scheme uses the urban canopy parameters referring to the morphological characteristics of the urban environment and then the AHF values are calculated internally by the sf_urban_physics scheme? I had a look at the URBPARM_LCZ.TBL file. So basically, if someone would like to intiialize the AHF values, they would need to provide a table with all the sf_urban_physics = 3 values (GAPHUM, GAPTEMP, HSEQUIP etc.)?

Best regards,

Maria

On 9/21/2022 2:56 PM, andreazonato wrote:

Hi @MariaCharaKarypidou https://github.com/MariaCharaKarypidou ,

At the state of the art, BEP+BEM cannot ingest anthropogenic heat flux. So it is not linked to the LCZs. I guess you should modify the code (and therefore the URBPARM_LCZ.TBL) to make it possible.

Andrea

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[andreazonato]

@MariaCharaKarypidou Ok Maria, now I understand you are referring to the air conditioning released by buildings (the AHF is another thing, that you can set for sf_urban_physics=1).

Yes, you can set the parameters you mentioned in the URBPARM_LCZ.TBL, one for each LCZ (for example, you can turn on the Air conditioning/ heating just in one LCZ, and make the GAPTEMP different for all the classes).

Of course, the energy consumption (and therefore the heat released) depends even on geometrical parameters, since they are proportional to the number of floors in the building (so to the building height) and the width of the building.

Hope this reply to your question

Andrea

[MariaCharaKarypidou]

Hi Andrea, thank you for clarifying that!

So if I understand correctly, the difference between sf_urban_physics=2/3 is that option 3 incorporates AC parameters, while option 2 does not? Are AHF available only for sf_urban_physics=1?

Best regards,

Maria

On 9/21/2022 4:27 PM, andreazonato wrote:

@MariaCharaKarypidou https://github.com/MariaCharaKarypidou Ok Maria, now I understand you are referring to the air conditioning released by buildings (the AHF is another thing, that you can set for sf_urban_physics=1).

Yes, you can set the parameters you mentioned in the URBPARM_LCZ.TBL, one for each LCZ (for example, you can turn on the Air conditioning/ heating just in one LCZ, and make the GAPTEMP different for all the classes).

Of course, the energy consumption (and therefore the heat released) depends even on geometrical parameters, since they are proportional to the number of floors in the building (so to the building height) and the width of the building.

Hope this reply to your question

Andrea

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[andreazonato]

Exactly. sf_urban_physics=3 adds the parameterization of the energy exchange between the building and the surrounding air.

And yes, AHF is available only for sf_urban_physics=1. However, with some coding it is possible to be implemented even on BEP+BEM

Andrea

[MariaCharaKarypidou]

Thank you very much, Andrea!

Best regards,

Maria

On 9/21/2022 5:11 PM, andreazonato wrote:

Exactly. sf_urban_physics=3 adds the parameterization of the energy exchange between the building and the surrounding air.

And yes, AHF is available only for sf_urban_physics=1. However, with some coding it is possible to be implemented even on BEP+BEM

Andrea

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