Ventilation systems in underground tunnels

 Ventilation systems in underground tunnels

Underground spaces need ventilation to help reduce any buildup of CO2 and help keep the area cool.

How natural ventilation works underground

Natural ventilation works through going from the entrance to the exit, traveling through bringing fresh air from the outside. There are many systems that can work so that the fresh air reaches all areas of the tunnels specializing in longer tunnels. 

Longitudinal ventilation 

The direction of airflow is longitudinal in nature. These types of ventilation in tunnels can bring the polluted air up and bring in the fresh air. It can move from the entrance to exit, entrance to the shaft, and shaft to shaft. 

Wind Towers

Wind towers work by taking the air out of the underground and transferring it with fresh air from above ground. Serval of these could be installed along Rye Lane to help ventilate the underground.

Mechanical Ventilation

This ventilation system work to keep fresh air in the area. It uses a blowing and exhausting combined by bringing cool air for outside and heating it up, or warm and cooling it down.

Sources

-https://theconstructor.org/transportation/ventilation-systems-in-tunnel-construction/15998/

-https://www.burrowbureau.com/ventilation-underground-homes.htm  

-https://www.scipedia.com/public/Gupta_Tiwari_2016a 

-https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/37/e3sconf_clima2019_01039.pdf