GAS TURBINE & COMBINED CYCLE DECISIONS
UPDATE
July 2015
McIlvaine Company
TABLE OF
CONTENTS
HVOF Coating Case Study for Power Plant Process Control
Ball Valve Applications
GTCC Valves Decision Guide by Bob McIlvaine - Hot Topic
Hour June 4, 2015
Valves for Combined Cycle Power Plants Webinar - Hot
Topic Hour June 4, 2015
Desuperheating Valves Take the Heat
Gas Turbine Combined Cycle Fast Start: The Physics
Behind the Concept
Cost Benefits of Critical Valve Repair in the Heat
Recovery Steam Generator
How to Design, Retrofit Drum-type HRSGs to Cycle, Start
Faster
Fast-Start HRSG Life-Cycle Optimization
Under the Proposed Clean Power Plan, Natural Gas, then
Renewables, Gain Generation Share
Updates on Water Discharge Regs, Reducing Air
Emissions, Complying with NERC CIP
Johnson Controls Offers Containerized Gas Turbine Inlet
Air Cooling
This is a case study of the failure of the coating on an on-off metal-seated
ball valve (MSBV) used in supercritical steam lines in a power plant. The valves
are exposed to rapid high-pressure and -temperature variations resulting in
cracking and cohesive failure of the high velocity oxygen fuel (HVOF) 80/20
Cr3C2-NiCr coating. It was found that carbide precipitation is a major factor
causing embrittlement of the coating.
Revision Date:
6/8/2015
Tags:
221112 - Fossil Fuel
化石燃料,
221112 - Fossil Fuel
化石燃料,
Velan, Valve, Thermal Stress, Journal of Thermal Spray Technology
Power Point sequence used as a basis for the discussion in the June 4 Webinar.
Revision Date:
6/4/2015
Tags:
221112 - Fossil Fuel
化石燃料,
Valve
Discussion of issues and options involving gas turbine combined cycle power
plant valves.
Revision Date:
6/4/2015
Tags:
221112 - Fossil Fuel
化石燃料,
Valve
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, Valve, Actuator, Reheat, Power Magazine
GTCC startup optimization is essentially minimizing the time required to reach
the dispatch power (e.g., full load or a specific part load) without "breaking
anything" in the process. For example, failure to control thermal stresses
results in cracks via low/high cycle fatigue (LCF and HCF) and brittle fracture.
This article provide relevant and easy-to-use technical information (in the form
of simple charts, basic equations and representative physical quantities) to
form an informed opinion on available technologies for GTCC startups.
Revision Date:
6/3/2015
Tags:
221112 - Fossil Fuel
化石燃料,
Bechtel, Gas Turbine, Optimization, Fast Start, Power Engineering
Modern advance frame combined-cycle power facilities operate in a dispatch
environment where cold starts, accelerated ramp rates and low load conditions
are the norm and where Balance of Plant (BOP) equipment accounts for more than
half of all forced outages. An analysis by Pentair revealed that valves are a
significant contributing factor in forced outages, primarily based on their
application numbers and the severity of their service applications. This article
focuses on small bore vent valves and drain valves, reporting research findings
that repairing these valves is more prudent and economical than replacing them.
Revision Date:
6/3/2015
Tags:
221112 - Fossil Fuel
化石燃料,
Pentair, Valve, Heat Recovery Steam Generator, Life Cycle Cost, Optimization,
Service & Repair, Heat Recovery, Fast Start, Power Engineering
Fast start and fast ramp of HRSGs in necessary in order to back up renewables
when the wind stops or clouds appear. Fast starts/fast ramps also reduce the
total emissions during a start, cut startup costs, and enable the plant to
achieve full-load revenues faster. This article summarizes a presentation
regarding the design and retrofit of HRSGs in order to optimize fast starts and
fast ramps.
Revision Date:
6/3/2015
Tags:
221112 - Fossil Fuel
化石燃料,
Vogt Power International, Heat Recovery Steam Generator, Optimization, Heat
Recovery, Fast Start, Combined Cycle Journal
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
In June 2014, EPA issued its proposed Clean Power Plan to regulate CO2 emissions
from existing power plants. In May 2015, the Energy Information Administration
(EIA) issued an analysis of the impacts of the proposed rule, along with this
summary. According to EIA’s analysis, the main compliance strategy will be to
increase natural gas-fired generation to displace coal-fired generation. Later,
after 2020, as more wind and solar capacity are added, renewable generation will
also surpass coal-fired generation.
Revision Date:
6/1/2015
Tags:
221112 - Fossil Fuel
化石燃料,
221112 - Fossil Fuel
化石燃料,
Energy Information Administration, Regulation, Clean Power Plan, CO2, CO2
Mitigation
This article summarizes several presentations from a Combustion Turbine
Operators Technical Forum (CTOTF) held in April 2015. The presentations address
the status of 316(b) water intake regulations and revisions to federal effluent
limitation guidelines for power plants, as well as technical issues associated
with CO catalysts.
Revision Date:
6/1/2015
Tags:
221112 - Fossil Fuel
化石燃料,
SCR, Catalyst, Effluent Treatment, Air Pollution Control, Combined Cycle Journal
Johnson Controls has introduced a containerized Gas Turbine Inlet Air Cooling
(GTIAC) system consisting of chillers, chilled and condenser water pumps,
electrical starters and a control system.
Revision Date:
6/1/2015
Tags:
221112 - Fossil Fuel
化石燃料,
Johnson Controls, Inc., Air Inlet House, Cooling, Air Treatment
On Thursdays
at 10 a.m. Central time, McIlvaine hosts a 90 minute web meeting on important
energy and pollution control subjects. These Webinars are free of charge to
owner/operators of the plants. They are also free to McIlvaine Subscribers of Power
Plant Air Quality Decisions and
Utility Tracking System. The cost for others is $300.00 per webinar.
See below for information on upcoming Hot Topic Hours. We welcome your input
relative to suggested additions.
|
DATE |
SUBJECT |
DESCRIPTION |
|
August 6, 2015 |
Gas Turbine Emission
Control |
|
|
August 20, 2015 |
Total Solution
Options
(No
Charge for All) |
McIlvaine Company
Northfield, IL 60093-2743
Tel:
847-784-0012; Fax:
847-784-0061
E-mail:
editor@mcilvainecompany.com
Web site:
www.mcilvainecompany.com