Internal Data Search by Publication
Managing the Catalysts of a Combustion Turbine Fleet
Historically, many gas plants have been operated cyclically with extended dormant periods due to high natural gas prices and a varying demand for the electricity the plant provides. For plants with an SCR system, stopping and laying up the equipment may accelerate aging of the catalyst system components, increasing the importance of inspections and preventative maintenance planning. This article discusses the process of economically managing a fleet of SCR-equipped gas turbines.
Revision Date: 8/3/2015
Tags: 221112 - Fossil Fuel 化石燃料, Cormetech, Catalyst, SCR, Maintenance, NOx Emissions Reduction, Power Magazine
Desuperheating Valves Take the Heat
A cascading bypass system uses an high pressure (HP) steam bypass valve and a hot reheat (HRH) steam bypass valve to manage steam flow to the steam turbine. The HRH bypass valve actuator determines the valve’s ability to respond to system demands. This article discusses the selection of HRH valves and actuators, and the corresponding impact on other plant components.
Revision Date: 6/3/2015
Tags: 221112 - Fossil Fuel 化石燃料, KOSO, Actuator, Valve, High Performance Valve, Reheat, Power Magazine
Fast-Start HRSG Life-Cycle Optimization
Modern heat recovery steam generator (HRSG) design must balance operating response with the reduction in life of components caused by daily cycling and fast starts. Advanced modeling techniques demonstrate HRSG startup ramp rates can be accelerated without compromising equipment life.
Revision Date: 6/3/2015
Tags: 221112 - Fossil Fuel 化石燃料, Foster Wheeler, Heat Recovery Steam Generator, Life Cycle Cost, Optimization, Heat Recovery, Fast Start, Power Magazine
Protecting Steam Cycle Components During Low-Load Operation of Combined Cycle Gas Turbine Plants
The cyclic operation of peaking plants introduces challenges that can result in damage to steam cycle components. This article provides an overview of the components that may be affected by low-load operation and highlights some potential solutions and the trade-offs involved. For example, at low-load conditions it is often difficult to keep heat exchange surfaces below design temperatures or operationally limited temperature. Low-load operation also introduces enhanced risk of fatigue damage and accelerated life consumption for Grade 91 piping materials.
Revision Date: 4/2/2015
Tags: 221112 - Fossil Fuel 化石燃料, Heat Recovery Steam Generator, Condenser, Steam Turbine, Cycle Chemistry, Power Magazine
Are Flexible Generation Plants Performing as Expected?
This article reviews the performance of the Siemens Flex-Plant installed at the Lodi Energy Center in Lodi, California. Designed to be highly flexible, fast-ramping and fast-cycling to complement renewable power generation, the facility experienced 380 starts over the two-plus year period from November 2012 to January 2015. The consensus is that the facility has lived up to expectations, although operational and maintenance costs are higher than for a typical combined cycle plant.
Revision Date: 4/2/2015
Tags: 221112 - Fossil Fuel 化石燃料, Siemens, Gas Turbine, FlexPlant, Performance, Power Magazine, USA
Quickly Boost Your Combustion Turbine Response
PowerPhase LLC has developed a new technology called TurboPHASE, a fast-responding, modular “turbocharger,” that can boost the capacity of an existing simple cycle or combined cycle plant by 10% or more in seconds. The system consists of a compressor that delivers hot compressed air to the discharge section of a combustion turbine, thereby allowing it to operate at the rated capacity irrespective of ambient air temperatures. Morris Cogeneration, a combined cycle cogeneration plant near Chicago, installed TurboPHASE, to boost capacity when needed during cold weather events.
Revision Date: 1/30/2015
Tags: 221112 - Fossil Fuel 化石燃料, Turbocharger, Air Inlet House, Gas Turbine, Cold Weather, Performance, Optimization, Air Intake, Power Magazine, USA
Prepare Your Gas Plant for Cold Weather Operations
Extreme cold weather in February 2011 severely affected power generation in the southwestern region of the U.S. This article reviews lessons learned from that event including the protection of instrument lines, pipes and valves, compressed air systems, cooling towers and other plant systems.
Revision Date: 1/30/2015
Tags: 221112 - Fossil Fuel 化石燃料, Maintenance, Cold Weather, Power Magazine
KOMIPO Relocates an Entire Combined Cycle Power Plant
South Korea has experienced years of booming electricity demand that has run ahead of its ability to maintain safe reserve margins. Korea Midland Power (KOMIPO) had an underutilized combined cycle plant in Boryeong that it decided to dismantle and move 100 miles away to Incheon to meet demand, rather than building an entirely new plant.
Revision Date: 8/20/2014
Tags: 221112 - Fossil Fuel 化石燃料, Korea Midland Power, Gas Turbine, Cost, Plant Relocation, Power Magazine, South Korea
Fully Automating HRSG Feedwater Pumps
Modern distributed control system platforms can provide many tools to capture best operating practices and automate them. This case study shows the steps taken to automate a hypothetical simplified feedwater pump system for a combined-cycle power plant. It describes a combination of control automation strategies and human-machine interface techniques designed to increase the overall level of automation while improving ease of use.
Revision Date: 8/18/2014
Tags: 221112 - Fossil Fuel 化石燃料, Siemens Energy, Distributed Control System, Boiler Feedwater Pump, Boiler Feedwater Treatment, Automation, Power Magazine
Recent Innovations from Gas Turbine and HRSG OEMs, by Thomas W. Overton, JD
Due to the growing demand for gas-fired power plants, OEMs have new opportunities for innovation. Recent innovations reduce emissions, make retrofits simpler and increase efficiency.
Revision Date: 7/21/2014
Tags: 221112 - Fossil Fuel 化石燃料, Gas Turbine, SCR, Performance, Optimization, Retrofit, Nox Control, Power Magazine