Hi,
I have been asked to simulate outdoor comfort for an outdoor space, parking + some green areas, in terms of PMV or equivalent (PET, PDD), considering also wind (represented as vector).
I simulated in the past UTCI, I wonder if there is a way to simulate PMV for outdoor spaces, and if so if there is any tool and resource you would suggest me.
As always, thanks in advance for your support and attentions.
Bests
Francesco
@FrancescoEmanuele I believe this is the component for you:
_model: A Honeybee Model for which PMV comfort will be mapped. Note that
this model should have radiance grids assigned to it in order
to produce meaningful results.
So don’t forget to add the grids where you want to simulate:
basic workflow:
best
-trevor
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PMV is not intended for outdoors. Conceptually it will be wrong to simulate that.
Rather, PMV is intended for conditioned spaces.
-A.
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@AbrahamYezioro is correct that the consensus today is that PMV, as a metric, is really only a good predictor of comfort for indoor conditioned spaces. It was developed from climate chamber studies and that is really the only type of environment that it’s good at describing.
However, historically, the Standard Effective Temperature (SET) that you can get from the PMV Comfort Map component by setting write_set_map_ to True was developed with outdoor conditions in mind. Typically, people changed the name of the metric to outSET when it was used for these purposes to make it clear that they were tying to use it outdoors (and that it therefore might not mean quite the same thing as when it was used on the indoors).
Granted, SET isn’t nearly as robust of an outdoor comfort metric as PET is so, if you need to use a “heat balance style” thermal comfort metric on the outdoors, PET is what I would recommend. I always had plans of adding another Thermal Map component for PET mapping but there was not enough demand to justify the time it would take to make it in the past. Furthermore we have a LB PET Comfort component that can be used to do certain PET mapping, albeit with a lot of data tree management.
@FrancescoEmanuele , if you decide to go down the route of experimenting with PET, I recommend starting from this sample file of a deconstructed comfort map:
… and just replace the PMV component at the end with a PET one. Given that you’re using it on the outdoors, you’ll also want to replace the interior E+ temperatures with outdoor ones…
If you find the results of that useful and the overall workflow of the deconstructed map limiting, let me know and I’ll keep a “HB PET Comfort Map” in mind when setting up my priority list for the future LBT releases.
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Thank you Chris, Trevor, and Abraham.
In this circumstance, I was thinking to use UTCI, I will try also to go through the LB PET Comfort Component. I will keep you updated.
Thanks for your support.
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@chris I managed to use the LB Pet Comfort component and it works, I would like to add materials for external surfaces (pavings, asphalt, vegetation).
I went through the deconstructed thermal map you shared, but I could not find out if, and how, it is possible to use that path to include construction materials.
LB Pet Comfort component is perfect, is there any way I could add materials (essentially the albedo) within that path?
thanks again for your support and attention
Francesco
You can learn some honeybee energy modeling. In particular, videos 8, 9, and 10 of this series will help you customize the constructions: