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The following Titles Reflect the Requested Application Sequencing
Advanced Sensors for Power Plant Instruments
Mettler Toledo is offering pH and other instruments with advanced digital sensors that go well beyond basic measurement and digital signal conversion within the sensor. Such sensors fully exploit the opportunities available when measurements are made right next to the sensor element. They don’t compromise the measuring circuit design in order to accommodate the resistance and capacitance of long analog signal cables, especially for conductivity measurement. They don’t incur uncertainty when different measuring circuits are used to calibrate the sensor than are used in the final installation because the measuring circuit is inseparable from the sensor elements. In addition, they always utilize correct calibration data for their measurements because on-board memory retains it. Advanced digital sensors include real-time predictive diagnostics. These take the sensor’s cumulative operating exposure into account to forecast in real time when calibration, maintenance and replacement will be needed. Taken together, the sum of these advanced sensor capabilities are designated Intelligent Sensor Management or ISM®. ISM sensors are able to warn of the need for service before loss of accuracy or failure, making the measurements more reliable and increasing the efficiency of maintenance scheduling. They can also eliminate unnecessary servicing
Revision Date: 9/12/2018
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Mettler Toledo, Instrument, Ultrapure Water, pH, Conductivity
Getting Reliable Turbine Bypass System Performance in Cycling Power Plants
Recommendations to get reliable performance of turbine bypass systems are made. These are based on recent experiences in a number of cycling power stations. Results of an investigation into cracks in the pressure boundary downstream of turbine bypass systems in some power stations are described. Where failures occurred, these systems were behaving quite differently from the design intent or what the operators thought was going on at the turbine bypass system (TBS). The root causes were traced through analysis of failed components, reviews of plant layout and operation, analysis of DCS data, additional measurements at the site and finite element analysis. The primary contributors to such problems were the control algorithms, oversized spray-water valves, leaking spraywater lines, and thermal shocking of the system. Improper layout of the system is a contributor in some cases. All these, in varying degrees, contribute to the damage to the components and, over time, results in fatigue failures.
Revision Date: 5/8/2017
Tags: 221118 - Other Electric Power , CCI, High Performance Valve, Valve, Steam Generation
Valve Market strategy focused on large purchasers such as BHE
This article in the December issue of Valve World by Mcilvaine advises suppliers of high performance valves to identify the largest purchasers and build the marketing program around them. An opportunity to work with BHE who spends $ 90 million/yr on valves is explained.
Revision Date: 11/7/2016
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , 221111 - Hydroelectric Power Generation 水力发电, 221114 - Wind Power , 221118 - Other Electric Power , BHE Environmental, Inc., Valve
Montrose supplies stack testing, consulting, and laboratory services
Montrose has acquired a number of companies and supplies a whole suite of environmental services.
Revision Date: 8/17/2015
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Montrose Environmental, Total System Solutions, Monitoring, Testing
Eliminating Feedwater Control Valve Damage with Multi-stage, Multi-path Flowserve Control Valves
The feedwater control valve (located downstream of the high-pressure feedwater heaters) performs the critical function of controlling the feedwater flow rate over a wide range of service conditions. During startup and shutdown, the feedwater control valve restricts flow by controlling near the closed position. The pressure drop across the valve is high, which can cause severe cavitation and noise. Over time, these severe service conditions will damage a control valve. Even a properly designed valve will not work well unless it is connected to a correctly sized actuator. An undersized actuator will cause unstable flow conditions while an oversized unit has a slow response to input signals. Flowserve has successfully addressed these issues with specially engineering multi-stage multi-path, or MSMP, designs. MSMP trim channels the flow through a series of orifices to reduce the pressure in stages. This prevents cavitation from occurring inside the valve. The velocity of the feedwater is kept low to prevent erosion of the valve body and to reduce noise and vibration. MSMP trim is customer-designed for the full range of service conditions. MSMP trim prevents cavitation when throttling near the seat but acts like a conventional control valve when controlling near the full-open position. As the pressure drop across the valve decreases, the cavitation also decreases and then stops. To maintain flow rate with decreasing pressure drop, the valve will open further and expose flow paths without orifices. The orifices are not needed at this flow condition because cavitation has stopped.
Revision Date: 8/3/2015
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Flowserve, Valve, Actuator, Boiler Feedwater System, High Performance Valve, Cavitation, Noise, Vibration
Combined Cycle Gas Turbine Valve Markets, Issues and Options
Valve suppliers can supply more than just valves. Total Solutions provide packages based on needs which are specific to processes and industries. This addition of Total Solutions to the revenue base adds more than $700 million to the annual market. GTCC plants have many special issues such as fast start HRSGS. They create unique requirements for valve design. A decision guide on GTCC valves is a gateway to the entire database on the subject.
Revision Date: 7/13/2015
Tags: 221118 - Other Electric Power , McIlvaine, KCI Technologies, Valve, High Performance Valve