View
596
Download
1
Category
Preview:
Citation preview
Large Scale Portable LNG Response Santa Cruz/Felton 2015
Austin A. Hastings, P.E., Senior Manager
LNG/CNG Engineering and Operations
Pacific Gas & Electric Company
In Case of Emergency
• Call 911 and Meet First Responders: Austin
• Sweep Room, Gathering Area, Roster Check: TC
• CPR Certified?
• Main Gathering Area: Front Gate
• Alternate Gathering Area: Left from tour trailer through transfer area
Page 2
Agenda
Comparison of LNG and CNG
Overview of LNG/CNG Eng & Ops Department
Portable LNG/CNG equipment
Background on the Project
LNG Planning and Logistics Process
Safety on Your Tour
Page 3
Comparison of LNG and CNG
LNG CNG
Pressures up to (psig): 200 4,500
Temperatures (F): -260F Ambient
Odorized? NO YES
How does PG&E Acquire It? From Third Parties At PG&E CNG Stations
Volume Expansion Ratio 600:1 275:1
Why Liquefy or Compress? Higher Energy Density
Advantages when used in a
Portable Application
Higher Flowrates Easier to Site
Higher Volumes Can be Unmanned
Higher Energy Density Refill at PG&E Facilities
Page 4
LNG/CNG Engineering and Operations
Created September 2011
Recognition that:
• Assets were treated differently than 49 CFR Part 192 assets
• Small equipment base
Many functions related to these assets in one compact department: Operations, Project Engineering, Facility Engineering, Standards Development, Maintenance Planning, Maintenance, Inspection, Budget Management (Capital, Expense, Distribution, Transmission), Customer Support (Third Party CNG vehicles), Training
51 Employees
Employee and Hiring Hall Make Up:
• 21 Technicians
• 6 Clerical and Material
• 14 Engineering/Technical
• 4 Portable Response Coordinators
• 6 Supervisory Page 5
LNG/CNG E&O Asset Base
33 CNG Fueling Stations
• Provide fuel for PG&E CNG vehicles (e.g., passenger cars, fleet trucks)
• Provide fuel for third party fleet operators and individual passenger vehicles
• Maintain a PG&E presence in the CNG “green vehicle” business
218 Pieces of Portable LNG and CNG Equipment
• Provide natural gas supplies to offset or supplement pipeline flowing supplies for
o Planned outages to reduce pipeline construction, maintenance and operations costs and complexity
o Winter peak load shaving
o Unplanned outages (emergencies)
Page 6
A Handsome Group!
Page 7
Portable Equipment Capabilities and Quantities
2010 2015 Storage
Volume
Capacity
Flowrate
Capacity Application
Example
LNG Tankers 3 10 up to 900,000 scf
5,000+ Residential,
Large Commercial LNG Fired Vaporizers 3 7 500,000 scfh
LNG Ambient Vaporizers 0 4 200,000 scfh
CNG Tube Trailers 5 24 up to 150,000 scf "Large CNG" - Up to
2,000 Residential,
Medium Commercial CNG Injection Trailers 5 16 up to 50,000
scfh
CNG Gaps 2 19 8,500 scf 2,000 scfh "Medium CNG" - Up
to 20 Residential,
Small Commercial
CNG Modules 0 90 2,200 scf 500 scfh "Small CNG" - Up to 3
Residential CNG Bottle Trailers 4 26 1,800 scf 500 scfh
TOTAL 22 218
Page 8
LNG Vaporizer - Fired 2015 Volume Capacity Flowrate Capacity Application Example
LNG Tankers 10 up to 900,000 scf 5,000+ Residential, Large
Commercial LNG Fired Vaporizers 7 500,000 scfh
Page 9
LNG Vaporizer - Fired
LNG is heated to change phase from liquid
to gas, heated to produce pipeline natural gas at 60-70oF, and the pressure is
controlled as appropriate
PIPELINELNG tanker loaded with LNG,
transported and then parked on site.
LNG TANKER VAPORIZER
Page 10
Vaporizer Components
Page 11
• On board air for pneumatic valves
• 480V electrical mainly for motor for water pump
• Nitrogen loop for cabinet purge and back up pneumatic control
• Fuel gas system
• Odorant system
• Telemetry
• Methane Detection
• Automatic alarm and shut devices
• Air, electric, motor, pump, heater, control system redundancies
• No LNG pump or methane compressors
• Focus is on spill elimination, not containment!
LNG Vaporizer - Ambient
2015 Volume Capacity Flowrate
Capacity Application Example
LNG Tankers 10 up to 900,000 scf 5,000+ Residential, Large
Commercial LNG Ambient Vaporizers 4 200,000 scfh
Page 12
LNG Vaporizer - Ambient
Page 13
LNG FIRE TRAINING
Page 14
LNG FIRE TRAINING
Page 15
“Large” CNG System
2015 Volume Capacity Flowrate
Capacity Application Example
CNG Tube Trailers 24 up to 150,000 scf "Large CNG" - Up to 2,000
Residential, Medium Commercial CNG Injection Trailers 16 up to 50,000 scfh
Page 16
“Medium” CNG System
2015 Volume
Capacity Flowrate
Capacity Application Example
CNG Gaps/Double Gaps 19 up to 17,000 scf 2,000 scfh "Medium CNG" - Up to 20
Residential, Small Commercial
Heat Exchanger
Bundle
Storage Cylinders
Pressure Control
Equipment
Page 17
PIPELINETrailer is loaded with CNG, transported,
and then parked on site. CNG pressureis reduced and then heated to produce
pipeline natural gas at 60-70oF
TRAILER with STORAGE, HEATING AND REGULATION
“Small” CNG Systems
2015 Volume Capacity Flowrate Capacity Application Example
CNG Modules 90 2,200 scf 500 scfh "Small CNG" - Up to 3
Residential CNG Bottle Trailers 26 1,800 scf 500 scfh
Heat Exchanger
Bundle
Pressure Control
Equipment
Storage Cylinders
Page 18
Telemetry (Levelcon) • Web based application
• Installed on CNG Equipment and LNG equipment
• Tracks flowrates, pressures, temperatures, GPS location
• Automatic page out capability
• Data can be trended and exported
• The larger the equipment, the greater the Levelcon capability
Page 19
Portable LNG/CNG – Peak Shaving
We use the same equipment to supplement
pipeline supply during high demands (cold
temperatures)
• Long term economic benefit versus pipeline
(+$25M)
• Short term project delay mitigation
(environmental, permit, budget)
• Very infrequent event
• LNG/CNG and Planning to work together for
more advanced coordination
• Same equipment, same people, same overall
process
Page 20
LNG
Auburn Clovis
CNG
Folsom Oakdale
Foster City Red Bluff
Lathrop San Francisco
Los Banos Stanford
Nevada City-1 Waterford
Nevada City-2
CROSS COMPRESSION
Santa Cruz
Portable Natural Gas Usage Increase
2010 2014 Increase
Tap-Days (Number of Days times
Number of Taps) 370 5,705 15 times
Average Number of Taps Each Day for
the entire Year 1.01 17 (52 at one time) 17 times
Customer Days Supported (majority in
2012 were two long term LNG projects) 14,000 1,317,000 94 times
Overall T-94B/95 Project
Santa Cruz LNG T-94B/95 Project Background:
• 5.58 Miles of hydrotest
• MAOP = 303 PSIG
• Spike pressure during test of 1,020 psig
• 10”, mostly Grade B seamless but some ERW
System Demands:
• Sole natural gas supply for approx. 44,000 customers for two weeks!
• Injection pressure: 275psig
• 215 Mscfd CNG - Capitola
Equipment:
• 5 portable 300hp compressors – 4 running, 1 stand-by
• 32 tankers
• 3 Vaporizers
• System Emergency Back-up:
• Santa Cruz Underground Holder: ~2.5MMscf
• Line pack: ~1MMscf
T-94B/95 LNGData
• Peak Flowrate
• 490 Mscfh
• 5,975 Gph
• Daily Volume
• 6,944 Mscfd
• 84,500 GPD
• 8.5 tankers per day
• Total Volume (including test)
• 111,100 Mscf
• 1.352 million gallons
• Total Pounds of LNG Injected:
• 4.786 million pounds, 2,400 tons
• 50% more than a World War II Destroyer
• Miles travelled
• Each Round Trip: 686
• Daily: 5,800
• Entire Project: 92,747
• 15 round trips from San Francisco to Boston
• Almost 4 times around the earth
Santa Cruz LNG Logistics
Felton/Santa Cruz – LNG Injection
Site
Boron – Primary LNG supply
location
Ehrenberg – Back-up LNG
supply location
Santa Cruz LNG Logistics
PG&E FeltonInjection Site
PG&E
PG&E
CE
CE
PG&E
PG&E
PG&E CE
CE LNG TANKER
CE LNG TANKERTransfer Site near Inj. Site
PIPELINE
PG&E VAPORIZER
PG&E
PG
&E
Tran
spo
CE Transpo Clean Energy LNG Production Plant
LNG Supply and Transport Real Time Driver Monitoring
Supply Facility in Boron
Jobsite Overview
Compression
Vaporization
LNG Supply
LNG Transfer
LNG Transfer Yard
Jobsite Overview
Compression
Vaporization
LNG Supply
LNG Transfer
LNG Tankers and Manifold
Jobsite Overview
Compression
Vaporization
LNG Supply
LNG Transfer
LNG Vaporizers
Jobsite Overview
Compression
Vaporization
LNG Supply
LNG Transfer
Vaporizer Discharge Manifold
Jobsite Overview
Compression
Vaporization
LNG Supply
LNG Transfer
Portable Compressors
Connecting to the Pipeline
Page 38
Operational
Site Lead
Logistics
Site Lead
Support
Support
Operator 1 Operator 2 Assistant 1 Assistant 2 Assistant 3
Transfer
Site Lead
Transfer 1 Transfer 2/
Assistant 4
Public
Liaison In the event of
an incident
AM
Peak
Safety
Compressor
Operator
Jobsite Organizational
Structure
Santa Cruz LNG Staffing
Total Number of People Involved: 89
• Total Technicians: 24
• Total Site Leads: 10
• Support Personnel and REI: 7
• Drivers/Loaders: 48
THIS IS A TEST (AND ONLY A TEST)
• Before any large scale LNG response, we test for a minimum of 16 hours. This test is for:
– Testing the specific layout as every project is configured differently.
– Testing the jobsite conditions to ensure no environmental issues impact the job.
– Confirm the downstream customer load.
– Ensure the equipment is functioning properly and did suffer a failure due to transport.
• Because this project is so incredibly complex, we are testing for 48 hours one week before the outage begins.
– This gives us time to reconfigure the jobsite, our operations or our process and even potentially retest before the pipeline outage begins.
• This is the first day of our test, and it will not be unusual for us to be shut down and changing our operations today.
SAFETY ON YOUR TOUR •Please stay close to your tour leader. Do NOT wander around the jobsite!!!
•If there is an operational issue, I will escort you to the trailer to allow the technicians to focus.
•If you need to leave or go to trailer, please let TC know and she will escort you.
•Wear PPE:
• At all times: hard hat, vest, eye protection
• Ear plugs and sunscreen as needed.
• Work gloves within 15’ of cryogenic piping.
•You are free to take pictures.
•We will have several spots for group photos along the route.
•Be cautious of tripping hazards.
•ALWAYS look around while walking, many trucks will be leaving/entering the jobsite.
•Properties of LNG reminder:
• -260F boiling point
• Unodorized
• Cold vapor heavier than air
• Asphyxiant
•Other jobsite hazards:
• CNG gas up to 3,600 psig
• Odorant
• Glycol
• Hot temperatures on compressors
STAY HYDRATED! Grab a cold bottle of water on your way out.
THANK YOU
Questions?
Recommended