DRAG® technology eliminates valve trim noise

IMI CCI provides low noise solution for air-cooled condenser.


Customer: Combined Cycle Power Plant

Region: Americas

The challenge

In the United States, two sister 640MW 2x1 combined cycle power plants received approval to modernise their facilities. Both plants will convert from water-cooled condensers to air-cooled condensers, eliminating the use of ocean water for cooling. However, the conversion to air-cooled condensers was not without risk.  Stringent far-field noise requirements associated with the neighbouring residential areas represented a significant hurdle. To complete their modernisation plan, the plant owners needed a low noise solution for the turbine bypass valves located upstream of their new air-cooled condensers.

The solution

The IMI CCI sales and application engineering team collaborated closely with
the end user, EPC, and OEM to define the complex engineering requirements of the air-cooled condenser system and the recommended system solution to meet the plant’s stringent noise requirements.  The IMI CCI solution provided multi-stage DRAG® technology to eliminate the valve trim noise and an under-the-plug configuration to mitigate the potential for low frequency seat bore jet recombination and valve outlet expansion noise.
In addition, the stringent far-field noise requirements necessitated multi-stage DRAG® technology be applied to the critical and typically noisy start-up vent applications.
This is an excellent example of IMI CCI’s experience, expertise, and global capability delivering an exceptional solution to the customer.​


English:​ IMICCI_CS01071.01-19en_AW_Dig.pdf

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DRAG® technology eliminates valve trim noise