CO2 concentration

Added a method to calculate the CO2 concentration profile over a simulation time.

The CO2 concentration in the make up air (m3/m3 person) was considered to be 440ppm.

The percentage of CO2 in the exhaled air was set to 4.2%.

Used refs:

• https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7127751/ - % of CO2 in exhaled air (4.2%)
• https://www.engineeringtoolbox.com/pollution-concentration-rooms-d_692.html - calculator to confirm the results.

Script to generate a CO2 plot for a simulation day (14/10/2022): CO_2.py

Script adapted by Andre (15/12/2022): CO2_inputs.py