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MarketScreener Homepage  >  Equities  >  Nyse  >  Emerson Electric Co.    EMR

EMERSON ELECTRIC CO.

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Emerson Electric : NAES Combustion Turbine Purge Credit Retrofit Reduces Power Plant Hot Startup Time by 30%

10/27/2020 | 12:05am EST

Following Emerson's completion of a combustion turbine purge credit retrofit project, NAES Corporation has reduced average hot startup time at Middle River Power's Tracy combined-cycle power plant by approximately 30%. The plant's ability to more quickly generate megawatts is expected to result in an additional $170,000 in annual revenue.​ High Resolution Image

Emerson executes turnkey project that enables gas-fired plant to generate additional revenue, reduce costs

​PITTSBURGH (Oct. 27, 2020)
- Following Emerson's completion of a combustion turbine purge credit retrofit project in early 2019, NAES Corporation has reduced average hot startup time at Middle River Power's Tracy combined-cycle power plant by approximately 30%. The plant's ability to more quickly generate megawatts is expected to result in an additional $170,000 in annual revenue.

The Tracy plant, located 80 miles southeast of San Francisco, is owned by Middle River Power LLC and operated by NAES. In response to fluctuations in renewable energy generation, the 323-MW, 2x1 combined cycle plant starts frequently-typically 250 to 300 times per year.

Prior to the retrofit project, the plant was required to perform a 20 minute, fresh air pre-start purge cycle to remove potentially explosive residual fuels from the combustion system. The purge cycle extended overall startup times, putting the plant at greater risk of a delayed or failed start and missing its power purchase agreement (PPA) dispatch obligations and potentially triggering substantial financial penalties.

To reduce that risk, NAES took advantage of a change to the National Fire Protection Association's NFPA 85: Boiler and Combustion Systems Hazard Code, which gave them the option to eliminate the pre-start purge by modifying fuel and monitoring systems. While replacing steam turbine controls and the excitation system at the Tracy plant with its Ovation™ automation technology, Emerson also made the National Fire Protection Association-compliant mechanical modifications to the fuel train and related changes to the combustion turbine and duct burner control logic. Emerson scope included mechanical, electrical and control system design, as well as installation and commissioning.

'Tracy has seen immediate results following the implementation of the Purge Credit project, most notably significantly reduced startup time. Emerson's technology and engineering resources got this project across the line for us and we are extremely pleased with the results,' said Nick van Haeften, P.E., maintenance manager, NAES Corporation.

Since the project's completion, the plant has been able to maintain an indefinite purge credit between dispatches. Eliminating the pre-start purge has reduced hot startup time by approximately 20 minutes, or 30%. Plant management estimates that this additional time online, at load, could translate into $170,000 in additional annual revenue. Reducing startup time may also help the Tracy plant avoid the expense of PPA failed-start penalties which could be in excess of $300,000 per incident. There have been no failed starts since project completion. Within 2 weeks of project completion, one failed start was already avoided due to the ability to re-start after a trip and still meet the dispatch.

There are other expected economic and operational benefits as well. Reducing heat recovery steam generator thermal stress is expected to extend the life of the unit by deferring maintenance costs for three to six years, which is beyond the timeframe of the utility's current PPA. All told, this project is expected to result in a return on investment in only two to three years.

'Today's power market is more competitive than ever,' said Bob Yeager, president of Emerson's power and water business. 'NAES is a forward-thinking organization that recognized how the purge credit can boost reliability and revenue, thereby putting the Tracy plant in an excellent position to capitalize on future market opportunities.'

Media:
• Contacts: Emerson Automation Solutions Global Media Contacts

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About Emerson
Emerson (NYSE: EMR), headquartered in St. Louis, Missouri (USA), is a global technology and engineering company providing innovative solutions for customers in industrial, commercial, and residential markets. Our Emerson Automation Solutions business helps process, hybrid, and discrete manufacturers maximize production, protect personnel and the environment while optimizing their energy and operating costs. Our Emerson Commercial & Residential Solutions business helps ensure human comfort and health, protect food quality and safety, advance energy efficiency, and create sustainable infrastructure. For more information visit Emerson.com.

Disclaimer

Emerson Electric Co. published this content on 27 October 2020 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 27 October 2020 05:04:09 UTC


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