The Annual Loads component will always be significantly faster than the Model To OSM component because:
The Annual Loads component runs at 1 timestep per hour by default, which is only suitable for modeling monthly loads and it CANNOT be used to model detailed HVAC energy use, natural ventilation, or peak load/HVAC size. Conversely, the “Model To OSM” component runs at 6 timesteps per hour by default, which is suitable for modeling all of these cases.
The Annual Loads component uses FullExterior solar distribution by default while the Model To OSM component uses FullExteriorWithReflections by default.
The HVAC system in the Annual Loads component is always Ideal Air and so there are no sophisticated HVAC controls to be computed.
So your difference in simulation time does not seem that unreasonable, especially if your model has a detailed HVAC system.
Also, your description here does not sound quite correct:
You should only be plugging rooms and shades into this “HB Model” component when setting up an energy simulation. If you are plugging in glazing (Apertures) to the HB Model component, then you are likely duplicating the geometry that is being sent off to the OSM.
Your screenshot is mostly correct except your are not adding the apertures correctly. You should be assigning the Apertures to your Rooms and then there is no need to connect the Apertures to the HB Model component. You should probably just watch this series here to get accustomed to the model creation workflows of the LBT plugin.
I have been through that whole series and it was very helpful. I rewired it as shown below for both a plenum version and non-plenum version of my design, ran HB Annual Loads for a quick look and got much closer results (270 vs 273). So the problem was that HoneyBee was angry with my bad wiring…Will run HB Model To OSM later to verify.
@chris The difficulty I’m having with using the tuts you posted above is that its a single-room, single level exercise with automated shades versus Rhino modelled shades. I went through every one of your multi-room tuts from 2014 (link below) to try to get a grip on multi-room workflow but the nomenclature and workflow seems to have changed quite a bit since then so not as useful.
There’s a playlist with some multi-zone tutorial modeling here:
It’s not finished yet but there’s some stuff there to get you oriented. And, as I mentioned in another post, the best/fastest way to build large Honeybee models is with the Pollination Rhino Plugin. We (the developers of Ladybug Tools) sell licenses for it but it saves a lot of time and we have some pretty robust documentation for it in the User Manual here as well as these Pollination Video Tutorials.
