directed inspection & maintenance: an overview of gas star practices technology transfer...
TRANSCRIPT
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Directed Inspection & Maintenance: AnOverview of Gas STAR Practices
Technology Transfer WorkshopJune 8, 2005Midland , Texas
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Outline
Background
Phase I - Study
Pipeline Leak Study
Monument Gas Plant
Phase II - Study
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Background
GRI Study – D I & M
D I & M - BMP
Dynegy’s experience with D I & M
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Phase I Study
Two DMS facilities in study
Cost was $ 30 K
Amount methane saved = 100 MMSCF/yr
($700K @ $7/MSCF)
Savings Realized within 18 Months – Largest
Cost-Effective Leaks Repaired
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Chico Gas Plant
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Chico Gas Plant – Old Flares
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Chico Gas Plant – New Flare
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Lost and Unaccounted For ProductPotential $ Savings
Equating Pure Methane Leak Rate to Dollars
$0.00
$500.00
$1,000.00
$1,500.00
$2,000.00
$2,500.00
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Cubic Feet Per Minute
An
nu
al $
In L
os
t P
rod
uc
t
At $4 Per 1000 CubicFeet
0.238 cu ft/min Estimated Economical to Repair
Economics of LAUF
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Optical Remote Leak Detection
Infrared Differential AbsorptionMid wave Infrared - 3 to 5 µmLong wave Infrared - 8 to 11 µmVisible - 0.4 to 1.0 MicronsNear IR -0.9 to 1.6 Microns
Remote sensing is the science and art of obtaining information about an object, area, or phenomenon through the analysis of data acquired by a device that is not in contact with the object, area, or phenomenon under investigation.
From Remote Sensingand Image Interpretation,
Lilles and and Kiefer, 1987
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Similar to Gas Chromatography
NIST
0
0.2
0.4
0.6
0.8
1
1.2
3.1 3.2 3.3 3.4 3.5 3.6 3.7
Wavelength (microns)
Abs
orba
nce
butane
ethane
propane
methane
water
CO2
3.31µm
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Active vs. Passive Imaging
Active techniques employ an artificial radiation source (e.g. a microwave transmitter, a laser, a thermal heater, etc.) for illumination of the target area
Passive techniques utilize the naturally occurring ambient radiation
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Passive Remote Optical Infrared Leak Detection, Quantification, and Speciation
LSILSI
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LSI Camera Visualizes Gasoline Vapor
Field PortableRuggedReliableRepeatableSensitivityEase of Use - Doesn’t
Require Frequent AdjustmentCapable of Identifying
“Inaccessible” Leaks
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LSI Leak Surveys Video Imagery
Flange Leak Buried Pipeline Leak
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Infrared LSI Camera
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High Volume Sampler
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Pipeline Leak Study
Driving – visible signs (e.g. vegetation
stress)
Driving with sniffer trucks twice a year
25 – 40 miles per day
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Pipeline Leak Study
Mass Balance Discrepancy Identified Need for
Survey
Infrared Remote Sensing from helicopter
200-400 miles per day
Amount of methane estimated at ~146 MM SCF /yr
or (0.5 MMSCFD)
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Monument Gas Plant
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Monument Gas Plant
Infrared survey conducted to identify sources of
leakage
~200 leaking sources identified
Largest opportunities - blow down vents and valve
packing
Amount of methane saved is ~146 MMSCF/yr $1022K
@ $7/MSCF
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Monument Gas Plant
26 engines to be replaced with integral
electric compression
18, 500 HP Replaced
Amount of fuel saved is 1.5 BCF/yr and
Corresponding CO2 Reductions
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Monument Gas Plant
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Monument Gas Plant
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Monument Gas Plant
Cost of this project $ 8.3 MM
Amount of fugitive methane losses saved is
~41 MMSCF/yr
Ancillary Benefit - Criteria (e.g. NOx) and
HAPs pollutant reduction
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Phase II Study
Eunice Gas Plant and upstream compressors
Chico Gas Plant Retest and upstream compressors
Included the LSI Infra red camera ( tool kit )
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Eunice Plant – Engine Room
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Eunice Plant
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Eunice Plant
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Eunice Plant
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Eunice Plant
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Chico Plant
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Future Plans
Coordinated Efforts for Sharing BMPs with Field
Operations and Maintenance Personnel in 2005.
Increase management commitment through
awareness of cost effective opportunities
Dynegy is evaluating implementing D, I & M system
wide
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Contact Information
Shankar Ananthakrishna
Senior Environmental Engineer
Dynegy Midstream Services, L.P.
Phone #: (713)-507-6753
Email: [email protected]
Jeffrey A. Panek
Principal
Innovative Environmental Solutions, Inc.
P.O. Box 177
Cary, Il 60013-0177
(847)516-3658
[email protected] FurryLeak Surveys Inc.P.O. Box 30661102 Early Blvd.Early, Texas 76802-2261(325) 641-8147Website: http://www.leaksurveysinc.com/