Working Principle of Dry Cooling Tower.
- Hot Fluid In: The warm process fluid, which has absorbed heat from an industrial process or a power plant condenser, is pumped into a system of pipes or coils. This circuit is completely sealed.
- Airflow: Large fans (mechanical draft) or natural wind (natural draft) force or draw ambient air across the outside of these pipes or coils.
- Heat Transfer: The heat from the hot fluid inside the pipes is transferred through the pipe wall (made of conductive metals like aluminum or copper fins) to the cooler ambient air flowing over them. The air is heated, and the fluid inside is cooled.
- Cool Fluid Out: The now-cooled fluid is sent back to the industrial process or power plant to absorb more heat, and the cycle repeats.
- No Mixing: The process fluid and the cooling air never come into direct contact. This is the defining characteristic of a dry cooling tower.