.1.1Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved.
The Babcock & Wilcox Company FastCirc™ HRSG
June 12, 2014
.2.2Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved.
HRSG Side Viewwith FastCirc™ Vertical Separator
Single row harps
FastCirc™ Vertical Separator
Optimized SH and RH drains
.3.3Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved.
FastCirc HRSG Arrangement
• Reduced crane requirements during construction• Increased personnel safety in operation• Performs the same function of an HP Steam Drum• Reduces shell and connection stresses during fast start and rapid load changes
.4.4Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved.
• Thick Walls (~6”-7” for a 2400 PSI Unit) – Limits startup time / HP drum life
• Drum hump during startup and transients
Drawbacks of Conventional HP Drum
.5.5Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved.
Patented FastCirc™ Vertical Separator
Vertical Separator Benefits:• Performs the same function as an HP
steam drum
• Thin Walls
• Increased Response to Load Changes
• Eliminates Drum Hump Problems
• Expands in the vertical direction (same as tube bundles)
.6.6Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved.
Vertical Separator Benefits:• Thin walls (~3” for 2400 PSI
Units)
• Expands in the vertical direction
(same as tube bundles)
• Integral internals
• Same steam purity and holding capacity as conventional drum
Patented FastCirc™ Vertical Separator
.7.7Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved.
• Hot start ≤ 8 hours
• Warm start > 8 hours and ≤ 72 hours
• Cold start > 72 hours
Typical Gas Turbine Ramp Rate for Hot Startup
Flow %Press. Psig, Temp °F
Time (minutes)
HRSG Startup Transient Conditions
Start Type Cold Warm Hot
Time to MCR Minutes 100 96 27
Drum Press., psig 2430 2430 2430
Temp., F 665 665 665
SSH Out Press., psig 2400 2400 2400
Temp., F 1050 1050 1050
Lifetime Cycles (30 years) 200 1170 4680
Cycles Vertical Separator HP Drum Design Cycles
Cold 1% 10% 200
Warm 6% 32% 1170
Hot 18% 140% 4680
Total 25% 182% 6050
Fatigue Life UsageFastCirc Vertical Separator vs. HP Steam Drum
.8.8Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved.
Thank You!
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