The Natconn Blog

The Client : NTPC Simhadri - Vishakhapatnam, Andhra Pradesh, India
The LOI Date: Oct. 2008
The Job: CW System Package - Stage 2
The Cost: INR 18.31 Crores

The Client : NTPC Jhajjar - Haryana, India
The LOI Date: Dec. 2008
The Job: CW System Package - Stage 1
The Cost: INR 25.76 Crores

Here’s the simplification:

The “CW” stands for Circulating Water. And Circulating Water Systems at any power plant have two important functions:

1. Filter water before it is pumped to and through the condenser
2. Cool the condenser

Major Components include:
1. Supply Basin: The water source. Sea, River, Ocean or lord varuna himself.
2. Trash Racks: These racks remove large debris such as seaweed, grass, or logs. These racks must be periodically cleaned to remove debris that builds up.
3. Travelling Screens: These are large steel screens up to 30 feet long that rotate and filter out larger debris that passes through the trash racks.

For further reading buy this. Arguably a power plant bible.