g ree ngis ood
except when it’s water.
CONSULTING
Our country is going through a
continuing shift towards embracing
environmentally healthy “Green”
technologies. U. S. Water Services
is proud to be a leader in this trend.
An “Energy Star” Partner since 2004, we
have long been committed to reducing
energy consumption and environmental
pollution at our customer sites.
CHEMISTRY
Whether removing newly restricted components from our treatment chemistries, or developing new ways to remove contaminants from waste streams, we are constantly working to minimize our customers environmental impact.
ENGINEERING
Our design team has created some of the most cutting edge water treatment systems in the country. They are helping our customers reduce or eliminate water discharge, and recycle gray water.
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EQUIPMENT
Our custom designed equipment helps our customers cut CO2 emissions and reduce energy usage.
Let us help you go green and clean.
environmental cost of frequent startups. If we can give them the ability to turndown equipment in off-peak time periods, we give them the maneuvering room they need to participate in ancillary markets and to meet their own power needs on a cyclical basis. Our OpFlex portfolio of operational flexibility enhancements, which include upgrades around startup, turndown and fuel flexibility, will play an increasing role in how we help our customers succeed.
Adams: Thorough consideration to operational flexibility is required for the continuously changing market. In addition to the high cycling duty, it is becoming very common to experience changes in gas composition that can easily disrupt the stability of the unit.
Upgrades to the F and G class turbines include significant improvements in emission capabilities. New ultra-low NOX combustion systems were developed with 9 ppm and 15 ppm NOX for F and G classes, respectively. These systems are also coupled with a proven self-tuning combustion dynamics system, allowing stable operation of the units even under changing gas composition as high as +/- 5 percent Wobbe Index.
The upgraded designs have also evolved toward faster load rates while maintaining tighter emission regulation. Additionally, more robust designs have allowed longer operating periods and more frequent start/stop cycles between maintenance outages. This cycling capability has been demonstrated at our in-house verification power station, where the industry steam- cooled pioneer, the M501G gas turbine, has accumulated 1,865 starts during its 10 years of operation.
Boyce: Siemens has developed the Flex-Plant 30 which integrates the fast-start technology of the SGT6-5000F into its existing highly efficient 2x1 60 Hz F-class combined cycle product with a triple-pressure reheat bottoming cycle. The focus of this plant is to utilize a proven product designed primarily for continuous-duty operation and expand its flexibility to span continuous-to-intermediate-duty operating regimes economically. For peaking- to intermediate-duty operation, Siemens has developed the Flex-Plant 10 which also integrates the fast-start technology of the SGT6-5000F into combined cycle application. The Flex-Plant 10 consists of the SGT6-5000F with 10-minute start capability (baseload in 12 minutes) with 9 ppm NO , advanced single-
X
pressure non-reheat HRSG with conventional SCR; bedplate-mounted non-condensing steam turbine; air-cooled heat exchanger condenser with full-capacity steam bypass system; and air-cooled generators for gas and steam turbines.
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