# Extension to comfort library -> operative Temperature calculation

### Functionality to add/problem to solve

Hey everybody, I updated the comfort library to accommodate the calculation of the operative temperature. This is actually very simple as it is the arithmetic mean value of the air temperature of each cell and the mean radiative temperature of each cell.

There are two options now:

a) No radiation model in use. b) Radiation model in use

For a) is already working as the user either specify a single value (in the FO dictionary) or a constant radiation temperature is derived from all walls given inside the geometry (its the mean temperature of all walls followed by the VDI2078). Hence, the patch added is sufficient to calculate the operative temperature

For b) I will go to implement the black body radiation calculation based on the G field as the operative temperature is a hypothesis based on a black body room. So while a user specifies the radiation model, each cell can be evaluated for the black body radiation temperature and hence the operative temperature can be directly calculated (not given in this patch but will follow).

### Target audience

Civil and Pharma-Industries.

### Proposal

Simply use the patch given (simply a few lines added)

### What does success look like, and how can we measure that?

Difficult.

### Links / references

EN ISO 7730 ASHRAE-55 VDI2078 comfort.C