GAS TURBINE
COMBINED CYCLE UPDATE
May 16,
2014
McIlvaine Company
TABLE OF CONTENTS
“Gas
Turbine Intake Filter Selection depends on the Site” – Hot Topic for Webinar May
15th
Total Valve Solutions for
Gas Turbine Operators
A high level discussion consumed 100 minutes yesterday in a webinar attended by
knowledgeable end users, consultants, fiber makers, media suppliers and filter
manufacturers. The goal was to enhance the decision making capabilities of the
utility participants. The discussion was based on the assumption that
participants had reviewed the data posted at
Gas Turbine Air
Treatment – Continuous Analyses
Paul Barilla,
an independent consultant, explained that all the decisions are not straight
forward.
As you move downward the factors affecting the decisions are less clear. If you
do not have the optimum budget you may inspect and replace filters less
frequently.
Geoff Crosby
of Lydall discussed the benefits of nanofibers including the lower
pressure drop.
McLeod Stephens
of Nederman explained that the filter is part of a train of treatment
elements with the screen, weather hood coalescers, filters, evaporative cooler
and droplet eliminator.
Dan Burch
and Tim Nicholas of Clarcor showed calculations indicating that
the synthetic medium efficiency filter with lower pressure drop is more
cost-effective than the HEPA filter. The cost analysis is displayed in the
recording but is not available in the power points.
Hersh Chaturvedi of Eastman explained that flexibility is available to manufacture synthetic fibers in various shapes and sizes. These fibers are incorporated with microglass in wet laid media resulting in performance and maintenance benefits. Eastman Cyphrex for Versatile Filtration Applications
The rest of the session was based on
the displays already on the website.
There was a review of a white paper by AAF, Donaldson and
Camfil Farr citing the many benefits of HEPA filters over medium efficiency
filters.
Gas Turbine Combustion Air Filtration “Its impact on Compressor Efficiency and
Hot End Component Life”
Ahlstrom supplies a range of media
types and efficiencies to meet gas turbine needs.
Ahlstrom Gas Turbine Air Intake Media
Donaldson is the largest supplier of the complete intake systems and also of the replacement filters. The vendor profile appearing in CCJ also appears in the McIlvaine air intake website. CCJ is on the cutting edge of IT with live links from the vendor pages to articles in previous issues covering the company’s products. This includes observations by end users from the meetings which Scott and Bob religiously attend. Donaldson Company Profile in the Combined Cycle Journal, October 1, 2013
Braden also has a CCJ company profile with links to articles. Braden Manufacturing Company Profile in the Combined Cycle Journal, October 1, 2013
There are power points and a recording of a previous hot topic hour presentation by MFRI. Solutions to Reduce Total Cost of Ownership Utilizing High Efficiency Filter Media by Jerrod Walters and Bryan Xu - Hot Topic Hour March 14, 2013
The high level discussion with the
website as an aid received some praise from participants including, “I am an
engineer from XXX China which is working for Gas Turbine filtration department.
Recently, I have a trip to Europe and joined the on-line meeting with my local
colleagues yesterday. You are really providing the perfect technical
communication platform. I plan to join this website.”
We will continue updating the website
Gas Turbine Air Filtration –
Continuous Analyses
We will report on both sides of the
debate - (Clarcor on one side touting the medium F9 filters and others arguing
for the HEPA filters. We will also
explore the following:
§
Static filters or pulsed filters
§
Number of filtration stages
§
Filter fibers or resins (glass
and synthetic)
§
Filter media (glass, synthetic,
mix)
§
Filter shape (pleating,
cartridge, etc)
§
Variations to cover unusual
ambient conditions such as arctic and ocean platforms
§
Placement of and use of
coalescers in conjunction with filters
§
Maintenance issues, such as
replacement rate, ease of replacement, increased energy loss with time, and
coating of turbine blades
§
Testing requirements
§
Air pollution control aspects
(may need to remove PM 2.5).
We will conduct a number of follow-up
webinars in the coming months.
The entire May 15 recording can be heard
at:
Gas Intake Filters: HEPA or Medium Efficiency
101 minutes
(You will need to enter your name and email address after clicking link to view
recording.)
The individual presentations are as
follows:
Gas Intake Filters: HEPA or Medium Efficiency Webinar - Hot Topic Hour May 15,
2014
A high level discussion attended by knowledgeable end users, consultants, fiber
makers, media suppliers and filter manufacturers.
Revision Date:
5/15/2014
Tags:
221112 - Fossil Fuel
化石燃料,
Lydall Filtration/Separation Group, Nederman, Filter
Addressing Moisture Issues by McLeod Stephens, Nederman - Hot Topic Hour May 15,
2014
McLeod explained that the filter is part of a train of treatment elements with
the screen, weather hood coalescers, filters, evaporative cooler and droplet
eliminator.
Revision Date:
5/15/2014
Tags:
221112 - Fossil Fuel
化石燃料,
Nederman, Filter
Geoff discussed the benefits of nanofibers including the lower pressure drop.
Revision Date:
5/15/2014
Tags:
221112 - Fossil Fuel
化石燃料,
Lydall Filtration/Separation Group, Nanofiber
Paul Barilla, an independent consultant, explained that all the decisions are
not straight forward. As shown in the slide, as you move downward the factors
affecting the decisions are less clear.
Revision Date:
5/15/2014
Tags:
221112 - Fossil Fuel
化石燃料,
Filter
|
2014 |
||
|
DATE |
SUBJECT |
|
|
May 29, 2014 |
Valves for gas turbine/combined cycle plants |
Free to everyone |
|
June 5, 2014 |
Dry vs. Wet Cooling |
Surprising number of ACC’S. Why? |
|
June 12, 2014 |
HRSG Issues (Fast Start, Tube Failures) |
Lots of challenges to cycle 200 x/yr |
|
June 26, 2014 |
CCR |
$ Billions Needed |
Valve companies and other “total solutions” providers go well beyond the typical
repair part supply program. Pentair Valves and Controls describes aspects of the
Pentair program which result in savings for the operator "Why the need for a
maintenance schedule customized down to each individual valve? No two valves
will need to be serviced at exactly the same time, and a typical offshore
platform will house several thousand valves – pressure relief valves, ball
valves, butterfly valves, triple offset valves, and actuation, control and check
valves."
"Automatically scheduling valve
maintenance on a single pre-determined cycle does not take into account the
unique operating conditions or exposure to elements that an individual valve
experiences. By taking a customized, integrated approach to developing a valve
maintenance plan, facility operators can look at every unique factor.”
The Total Solutions approach includes much more than just management of the
valve maintenance. New technology to reduce operation and maintenance is a key
part of the opportunity. There has been lots of discussion of smart valves. This
is an important factor in Total Solutions but the opportunity includes controls
and modifications to eliminate problems.
One company which has addressed specific maintenance problems and derived
solutions is JASC. They came up with a solution to the wasted fuel and valve
coking associated with periodically validating the operability of the liquid
backup fuel system in gas turbine operations. It has always been mandated by the
turbine O.E.M.’s that the back-up liquid fuel system be exercised regularly.
However, for a turbine owner, adhering to this regimen of exercising the fuel
system means a significant risk of trips due to high exhaust temperature
spreads, paying the high costs associated with burning liquid fuel and dealing
with the significant emissions associated with burning diesel fuel.
JASC has developed the Zero Emission Equipment (ZEE) Performance Test system for
back-up liquid fuel systems in dual fuel turbine applications. This system will
allow the gas turbine owner to operate the back-up liquid fuel system through
the entire operational range of fuel flows, light-off to full speed full load
without burning fuel in the nozzles. This technology expands upon JASC’s water
cooled fuel control designs. The benefit is that all fuel system components are
operated and flowed using the turbine electronic controls. All equipment in the
fuel system is tested from the main fuel tank to the control valves at the fuel
nozzles as part of the process.
Benefits include avoidance of coking of the valves, reduction in fuel costs, and
also reduction in air pollutants and greenhouse gas emissions.
McIlvaine Company
Northfield, IL 60093-2743
Tel: 847-784-0012; Fax:
847-784-0061
E-mail: editor@mcilvainecompany.com
Web site: www.mcilvainecompany.com