Cycle Isolation Monitoring
Power & Process Products and Services
Curtiss-Wright is a global integrated company with a
long tradition of providing state-of-the-art, reliable
solutions through trusted customer relationships.
The Plant Optimization Group, a business unit within
Plant Information Monitoring and Control, provides a
variety of products, services, and software-related
solutions to the global power industry. We are leaders
in thermal performance software and services; equipment
reliability solutions; valve condition monitoring; and
advanced data analytics. We further enhance our customer
support through our Monitoring and Diagnostic Center
providing remote detailed evaluation of the condition
of clients’ assets.
We are committed to the safe operation and improved
performance and reliability of power plants worldwide.
This chart illustrates the impact on
generation and heat rate resulting from valve leak-by.
HP Heater 5 ES Safety to ATM
HP Heater 6 ES Safety to ATM
Aging plants, deteriorating valve performance, and increased
demand for electric power require careful attention to
any potential loss of efficiency and generation. Often
capturing lost MWs is the greatest return on investment,
especially inside of the steam cycle. To find these lost
MWs in the steam cycle, Curtiss-Wright has developed our
Cycle Isolation product to keep your plant operating at its
Finding and correcting issues with leaking valves in power plants leads to:
Improved plant efficiency
Prevention of valve damage
Decreased fuel usage
Decreased water production cost
Decreased maintenance cost
Cycle Isolation is valve leakage losses that bypass
the generation process. Leakage through these valves
is one of the largest and often most overlooked issues
in nuclear, fossil, and CCGT power plants. In some cases,
leaking steam valves can result in more than 5 MWs of lost
generation! These losses are compounded by the undetected
valve leakage continuously damaging the valve, increasing
the leak, and leading to additional losses in generation
and increased heat rate.
By understanding and evaluating the valves’ performance,
we can balance MW losses against planned outages and
determine maintenance scheduling that is most advantageous
to the utility.
How does the Cycle Isolation Product Work?
On-line Cycle Isolation monitoring and reporting is
now an integral part of our FAMOS suite and PEPSE-RT
thermal performance monitoring software. Combining
real-time data and web browser displays, our product
quickly detects cycle isolation issues and automatically
estimates the leakage rate as well as generation and
heat rate impacts for each leaking valve.
The Cycle Isolation product uses downstream temperature
information to generate leakage alerts. These temperatures
can be entered manually from plant walk downs, or, if
instrumentation is available, the data can be gathered
in real time. Additionally, tools are available to set
up notification, alarms, and reports to be automatically
delivered to users and recorded in the historian.
The Cycle Isolation module can be deployed as an
upgrade to an existing FAMOS/PEPSE-RT installation
or independently. With either option, the cycle isolation
monitoring system is a must-have for getting the most
out of your power plant.