Closed-circuit Air Coolers for Small Thermal Power Plants

Closed-Circuit Air Coolers for Small Thermal Power Plants

Closed-circuit air coolers for small thermal power plants (typically referring to condensing/back-pressure units ≤60 MW, gas turbine/biomass/ waste-to-energy waste heat recovery units) are heat exchange systems that use air as the final cooling source and feature a fully enclosed internal circulation of process media (circulating water / thermal oil / ethylene glycol). They are designed to address three key requirements: water conservation, water quality preservation, and precise temperature control, and are suitable for both auxiliary equipment cooling and main condensing / waste heat recovery applications.

Closed-loop Auxiliary Equipment Cooling System (Air Cooler)

Components: Tube-fin air cooler + closed-loop circulation pump + expansion tank + filter + makeup water system

Process: Cooled medium (lubricating oil / generator cooling water / hydraulic oil) → inside air cooler tubes → heat exchange and cooling via air side → return to equipment for circulation

Key Features: Fully enclosed medium, zero pollution, zero evaporation; suitable for critical auxiliary equipment such as oil stations for induced and forced draft fans, generator air cooling, and coal mill lubrication systems.