Atmospheric fluid bed cogeneration air heater experiment: Materials evaluation for an in-bed heater exchanger to heat air to 1500{degree}F (816{degree}C). Task 8, Observe, reduce and review test data
- Babcock and Wilcox Co., Alliance, OH (United States). Research and Development Div.
This Executive Summary, Final Report, presents the results of the Department of Energy-sponsored program to evaluate a cogeneration system which integrated an indirectly heated open cycle gas turbine with an atmospheric fluidized bed fired with coal. This concept uses combinations of steam and 1500{degree}F (816{degree}C) pressurized air to generate electricity, process air and process steam. After giving an overview of the advanced fluidized bed air heater technology program, this report reviews the results of testing various air heater candidate materials for up to 2000 hours in a 1.8 m {times} 1.8 m bubbling atmospheric fluidized bed test facility. For heat exchanger tubing materials operating at outside metal surface temperatures above 1400{degree}F(760{degree}C), our first choice is 304H stainless steel clad with TP310 stainless steel. The main reasons for the choice of this combination are the corrosion resistance of the TP 310 SS, the strength at temperature of the 304H SS and our familiarity with fabrication of boiler superheaters from 304H SS. We chose Inconel 800H clad with TP310 stainless steel as a close second. This combination also has good corrosion resistance and strength. We are concerned that the Inconel may degrade rapidly if the 310 SS cladding is locally breached. At lower temperatures, where the strength is adequate, monolithic TP 310 SS tubes may be used. For butt weldments between tube lengths our first and second choices are 308 SS and 21-33FM for the 304H/310 and 800H/310 tubes, respectively. For the uncooled supports Alloy Casting Institute (ACI) alloys, HK40 and HH are our first and second choices, respectively. In general, the high chromium materials were the most corrosion resistant and the high nickel materials the least resistant. We saw no evidence of significant erosion. We saw no definite effect of bedside metal temperature on material wastage.
- Research Organization:
- Westinghouse Electric Corp., Orlando, FL (United States); Babcock and Wilcox Co., Alliance, OH (United States). Research and Development Div.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-82CE40543
- OSTI ID:
- 10124925
- Report Number(s):
- DOE/CE/40543-8.2; ON: DE92008176; IN: RDD:91:4273-50-01:01
- Resource Relation:
- Other Information: PBD: Apr 1991
- Country of Publication:
- United States
- Language:
- English
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