Internal Data Search by Application
The following Titles Reflect the Requested Application Sequencing
Proper Steam Bypass System Design Avoids Steam Turbine Overheating
The steam bypass system is generally used during the following modes of operation: start-up and shutdown, steam turbine trip, steam turbine no-load or low-load operation, and simple-cycle operation. On start-up, the isolation of the CTG/HRSG from the STG allows the CTG to be placed on load without delay and well before the heat-up and roll-off of the STG. In addition, a faster start-up of the STG is possible since the bypass system provides the capability of close temperature matching between the steam inlet temperature and the steam turbine metal temperature.
Revision Date: 9/9/2019
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Turbine, Valve, Power Engineering
Vector and Wellheads engineering turbine bypass system
This paper has a good flow diagram with valve locations. The turbine bypass system is a very important component in power stations, and of a difficult service too.
Revision Date: 9/9/2019
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Vector & Wellheads Engineering SL, Valve, Turbine
Valvtechnologies Turbine Bypass System
The steam turbine bypass system will allow the operator to keep the gas turbine and the heat recovery system generator (HRSG) on-line in the event of a steam turbine trip or to facilitate faster start-ups of the CT and HRSG.
Revision Date: 9/9/2019
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Valvtechnologies, Valve, Turbine
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
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
E.ON is one of the top 200 purchasers of flow control and treatment equipment. E.ON owns generating plants with different fuels. It is setting up a new company which will own the coal fired generating facilities. It is in the construction stage of a new coal plant in Germany and has recently bought a coal fired plant in Brazil.
Revision Date: 11/2/2015
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , E.ON
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