Hot Topic Hour May 21 covered GTCC Air Intake Issues and Options
The 90 minute session on May 21 covered four route maps and summaries in the Gas
Turbine Combined Cycle Air Treatment Decision Guide:
All part of
Gas Turbine Combined Cycle Decisions.
This program includes a website with locators leading to presentations, white
papers, case histories and other material which will support one choice or
another. The challenge for the user is to determine which locators are needed
for a particular decision.
Decision guides have been developed to lead the user to the material he
needs. In addition to one on air treatment, there is one on emission control.
We will have a Hot Topic Hour on June 4 to review the route map and summary of
GTCC valves which, in turn, is part of the decision guide on Power Plant Valves.
The locators on the decision guide websites are a subset of the information in
the same locator in the main GTTC Decisions Website. For example, when you
click on valves in the Air Treatment decision guide you just find articles about
pulse jet valves for air inlet filters. When you click on valves in the Power
Plant valves decision guide you see valve information for all combustor
types. The GTCC
Valve Route Map and Summary highlights the most relevant
GTCC valve information.
The meeting in Charlotte April 29 focused on the overview of air intake
conditions and needs and also on the air intake filters. The meeting yesterday
added more to the filters and media route map and summary and introduced two new
route maps.
Overview
No new material was added here.
Intake System
Integrity Power Solutions
filter house modification and upgrade information was added. Coverage of DRB
products and services was added. Information was added on
AtCO inlet anti-icing
systems.
Steve Hiner
of Clarcor explained that the
company furnishes complete intake systems and/or individual components. The
former filter division’s ownership by
GE provided insights into turbine supplier and operator needs.
Bob Every
of Pentair covered filter
cleaning.
The filter cleaning approach can make a big difference. The filter and media
design should be chosen with cleaning options in mind. Pentair made the same
point in the McIlvaine Hot Gas Filtration Webinar where ceramic candles failed
until a new filter cleaning system from Pentair was installed.
Mark Schaffitzel
of Braden described a
complete suite of products and services for gas turbine intakes including CFD.
Brad Kippel
of GE was asked whether they
required vendors to furnish CFD or whether they conducted these analyses
internally. The answer was that the intake analysis tends to be done by GE but
the air filter portion by the vendor. Braden recently introduced two new filters
including a deep bank TriCel and ExCel which is an F9 synthetic pulsed filter
rated at 80 percent new filter efficiency on 0.3 micron particles.
Power Augmentation
Dharam Pumwani
of Avalon Consulting
discussed the economics and alternatives of inlet gas cooling. There are
two basic options:
§
Reduce the air inlet temperature
§
Reduce air temperature during compression
There are six ways to reduce air inlet temperature:
§
Direct Evaporation:
Wetted Media, Fogging
§
Indirect Evaporation
§
Chilled Fluid:
Indirect Heat Exchange, Direct Heat Exchange
§
Chilled Fluid in TES:
Full-Shift and Partial-Shift
§
LNG Vaporization
§
Hybrid:
Some combination of two or more cooling technologies
Since the options differ based on cost and impact under various conditions, you
need to evaluate all the parameters as per the following example:
In this segment information was added on the water injection system by GTE and
the steam injection at a Polish plant.
Filters and Media
Steve Hiner of Clarcor provided a set of challenges for the non-woven industry.
Jan Kaukopaasi
of Ahlstrom displayed graphs
showing the percentage of small particles in the real world differ considerably
from test dust. To overcome this problem Ahlstrom has invested in a mobile
test rig.
Ahlstrom has introduced Flow2Save which is claimed to have a 30 percent energy
savings and a more sustainable footprint than conventional HEPAs.
Richard Lydon
of Filtration Group explained
the water problems encountered on floating platforms and coastal sites.
Here is the solution.
Information on DRB products and services including a range of filters was also
added.
Eli Ross
of Donaldson covered the full
range of materials and filters available from Donaldson. He also displayed the
comparative efficiency of a design which combines water resistance and high
efficiency (TTH2Oplus).
Over the next several months we will continue to populate the Decision Orchard
and to add more options to the Air Treatment Decision Guide. We will be
updating subscribers with the Alerts. Suggestions relative to this program are
welcomed.
Gas Turbine Intake Filters Webinar - Hot Topic Hour May 21, 2015
The session covered four route maps in the Gas Turbine Combined Cycle Air
Treatment Guide
Revision Date: 5/21/2015
Tags: 221112 - Fossil Fuel
化石燃料, Air Treatment