1. .1 Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved. The Babcock & Wilcox Company FastCirc™ HRSG June 12, 2014

2. .2 Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved. HRSG Side View with FastCirc™ Vertical Separator Single row harps FastCirc™ Vertical Separator Optimized SH and RH drains

3. .3 Proprietary 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. .4 Proprietary 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. .5 Proprietary 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. .6 Proprietary 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. .7 Proprietary 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) Fatigue Life Usage FastCirc Vertical Separator vs. HP Steam Drum

8. .8 Proprietary and Confidential © 2014 Babcock & Wilcox Power Generation Group, Inc. All rights reserved. Thank You!