How to set window opening for windows with different fract_area_oper in the same room?

charlie.brooker · March 18, 2023, 10:55am

I think the set up you have there will apply the second window opening control to all openings.

There might be a way to do this with the components, but I feel like this might be something that you need a python component for.

If you look at the code in the HB Window Opening component:

github.com

ladybug-tools/honeybee-grasshopper-energy/blob/master/honeybee_grasshopper_energy/src/HB Window Opening.py

# Honeybee: A Plugin for Environmental Analysis (GPL)
# This file is part of Honeybee.
#
# Copyright (c) 2023, Ladybug Tools.
# You should have received a copy of the GNU Affero General Public License
# along with Honeybee; If not, see <http://www.gnu.org/licenses/>.
# 
# @license AGPL-3.0-or-later <https://spdx.org/licenses/AGPL-3.0-or-later>

"""
Define the window opening properties for all operable apertures of a Room.
_
By default, the properties assigned by this component are translated into simple
ZoneVentilation objects in the resulting IIDF, which can approximate airflow
from both single-sided bouyancy-driven ventilation as well as wind-driven cross
ventilation. Bouyancy-driven flow can happen for essentially all openings while
wind-driven flow can only happen when there are pressure differences across
windows on opposite sides of a Room.
_
Simple ZoneVentilation is computed using the following formulas:

This file has been truncated. show original

Hopefully you’ll be able to follow the logic of how the window opening is being assigned.

It might be possible to use some of this code, but instead of applying the vent opening to the room, it may be possible to apply it to the aperture by doing

vent_aps = aperture.properties.energy.assign_ventilation_opening(vent_open)

You’d then have to build some logic to filter the apertures to assign one type of control to one set and another to the other set.