Indirect Dry Cooling - Dry Cooling
Overview
An indirect dry natural draft condensing system, in the example above, couples a dry cooling tower with a steam surface condenser. Such a condensing system is particularly suited for large power plants. The concept can also be applied with mechanical draft dry towers over a wide range of plant sizes.
Features
Turbine exhaust steam condenses in the surface condenser, which utilizes a secondary cooling water loop to reject the heat from the cooling water to the ambient air via the Natural Draft Cooling Towers fin tube bundles. The condensed steam is returned to the boiler circuit.
The cooling bundles are horizontally inclined within the tower shell or vertically arranged at the tower circumference.
The bundles consist of high quality fin tubes such as elliptically shaped with wound steel fins that are hot dip galvanized.
Benefits
- No effect on environment.
- No water consumption water treatment represents and provides a safety barrier for nuclear power applications.
- No visible plume compact simplified design with greater degree of prefabrication in workshop.
- No fan power consumption small power consumption in water loop circulation pump.
- Negligable noise generation
- Outstanding corrosion protection
- A separated loop for steam and cooling water avoid contamination or high water treatment requirements
