ladybug_comfort.di module¶
Utility function for calculating Discomfort Index (DI).
- ladybug_comfort.di.discomfort_index(ta, rh)[source]¶
Calculate discomfort index (DI) from air temperature and relative humidity.
Discomfort Index is derived from original work carried out by Eral C. Thom [1] which defined discomfort index based on dry-bulb and wet-bulb temperature. It is the human-perceived increase in air temperature due to humidity increase.
Note
[1] Thom, E.C. (1959) “The Discomfort Index”. Weatherwise, 12, 57-61.
- Parameters
ta – Air temperature [C]
rh – Relative humidity [%]
- Returns
di – Discomfort index [C]
- ladybug_comfort.di.discomfort_index_effect_category(di)[source]¶
Get the category of effect associated with a given discomfort index (DI).
Each number (from -6 to 3) represents a certain DI thermal sensation category. With categories being the following:
-6 = Hyper-glacial
-5 = Glacial
-4 = Extremely cold
-3 = Very cold
-2 = Cold
-1 = Cool
0 = Comfortable
1 = Hot
2 = Very hot
3 = Torrid
- Parameters
di – Discomfort Index [C]
- Returns
category – An integer indicating the level of effect associated with the discomfort index. Values are one of the following:
-6 = Hyper-glacial
-5 = Glacial
-4 = Extremely cold
-3 = Very cold
-2 = Cold
-1 = Cool
0 = Comfortable
1 = Hot
2 = Very hot
3 = Torrid