Energy Simulation - Differentiate Fixed and Openable Windows

Hi Chris, hi all,

first of all thank you for the continuous development of Ladybug and Honeybee tools, they are great!

I’m working on the energy simulation for a greenhouse at the top of a skyscraper. The space will be naturally ventilated and I need to run a few simulations to understand its thermal behaviour.

I’ve started creating the Honeybee Zone but I’m struggling with the definition of the different windows’ typologies. In fact, some of them are openable and some of them fixed (see attached image) and I would like to differenciate them in my definition. Is there a way to do it so to correctly set up “Honeybee_Set EP Airflow” later on?

Thank you for your help!


@AndreaRossi772 ,

The short answer is “yes you can” but it’s ultimately up to you to do the math about the total fraction of your glazing that is operable and height differences between the lower and upper windows on your greenhouse. You then plug this fraction of total are and height into the Set EP Airflow component. Alternatively, you might want to build a custom wind and stack object to get full control over the airflow calculation, which is the second option here:
http://hydrashare.github.io/hydra/viewer?owner=chriswmackey&fork=hydra_2&id=Natural_Ventilation&slide=0&scale=1&offset=0,0

The EnergyPlus Input/Output reference has details about how to use this wind and stack object and what the calculation method is:
http://bigladdersoftware.com/epx/docs/8-7/input-output-reference/group-airflow.html#zoneventilationwindandstackopenarea

-Chris