Hi community, I recently been trying to get an accurate visualization of the outdoor comfort with Ladybug tools, and especially with UTCI measurement. I followed all hydras possible about that subject and many many posts. As vegetation - trees, green surfaces, and others - play a crucial role in th…

Thanks for the example @Erikbeeren , opening your example is correct, but when I apply this material and batteries, the thermal properties results are reverted, I mean, the grass Is hotter than concrete, I would like to attach the model, but it says I am a new user.

Hi @gonchotorena , I checked the model again. When i run the simulation I get the same results as in the animation. What could be the issue is that the order off the zones created is different when you open the file. The tags which I put above the zones in that case do not correspond with the zone…

Thanks for your answer @Erikbeeren . My fault, I wanted to say that the problem happens when I apply your grasshoper model to my own project. Finally I can attach the model. [example] I attach now the model Example.zip (985.2 KB) New upgrade: Last night I was checking again. One problem was the…

Hi @gonchotorena , I attached your weather file to my model and and had the same results as you had. The grass surface heated up more then concrete surface. In reality this can’t be the case. If you walk bare-foot outside on a hot sunny summer-day, you will burn your feet on concrete pavement but …

Thanks for the information and the references. Im gonna check the problems, but its probably I will use the official epw files. I´m new with ladybug, when you say tickness of the ground zone you refer the distance of the extrusión of the geometry, isnt i? As well the thick of the soil is the materi…

Yes, but you can try also the other parameters. For instance the “leaf reflectivity” has also a huge impact on the results. In the input/output reference of energyplus on page 214 you can find more information about the different settings. InputOutputReference.pdf 16.13 MB …

Sorry for reply lately. Thanks a lot

Hi @Erikbeeren , Coming to this conversation a little late, but I’m having a similar issue with trying to add grass to a surface and comparing it to concrete. If I use your file directly, then I get the following result [image] The grass in all cases performs worse than concrete… In applying the …

Hi @ElzineBraasch , I think you have to dive deep in to the energyplus calculations to really understand what is happening. Wich factors are taken into account and wich are not and how this relates to the physical process described in different literature. I did not have time yet for doing this.

As @Erikbeeren suggests, there are a whole host of reasons why concrete would be cooler than grass, especially when the surfaces are relatively cool like in your screenshot. Usually, concrete has a higher albedo than grass so it absorbs less energy to begin with. If the climate is humid (like Melb…

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Outdoor comfort UTCI microclimat map || Vegetation limitations

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