[Bldg-sim] Natural Ventilation with Archsim

Performance Network via Bldg-sim bldg-sim at lists.onebuilding.org
Sun Jun 4 03:15:22 PDT 2017


Archsim is a multi-zone simulation program for Rhino3D using Grasshopper3D algorithmic modeling. Archsim can simulate natural ventilation in 3 different modes.


1. Scheduled
2. Simple wind and stack equations
3. Airflow network


Learn more<https://attendee.gototraining.com/42b11/register/6836385445249017602>


The first option is great for coupling Archsim with other tools that return a schedule of air-changes in hourly format. Just link this schedule in the zone settings under the ventilation tab or specify a fixed air change rate.This model does not model airflow from zone to zone.


The second option uses simple formulas explained on the slides below. This model is extremely robust – especially for buoyancy driven flow. Wind driven flow always assumes an ideal exhaust and basically simulates cross-ventilation – even if you only model one window – this can easily lead to overestimation of the wind driven ventilation potential. This model does not model airflow from zone to zone.


[cid:7acdd585-bd45-4c10-a2f7-2420227d5c17]


The third option is the airflow network. It provides the possibility to model natural ventilation and more complicated airflow paths through the building. Thus, this is the preferred option – however – it might slow down your simulations.


Learn more<https://attendee.gototraining.com/42b11/register/6836385445249017602>


...


Performance Network
http://www.performance.network


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