The Natconn Blog

Good read this one

This time around we have our hands full with coal-fired plants. But we’d love to do supercritical stuff. It kinda looks great on the company’s CV. Today’s state-of-the-art, supercritical coal-fired power plants - the up and coming one in india - provide efficiencies that exceed 45 percent. This benefit will significantly increase the kWh produced per pound of coal burned, with fewer emissions. In addition to using less coal, lower emission levels for supercritical plants are achieved using well-proven emissions control technologies.

We are now rough and ready .Here goes the duct on 6th March. The CW duct.

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.

This is NTPC Simhadri. We are working on the 2nd phase of this fossil fired power unit and we have a great deal of work to do. 9000 tonnes to be precise. At the onset of things this is SMAW. Or MMA.