Field testing of a ceramic heat exchanger for heat recovery application
AiResearch Company, Torrance, California, developed a 5 MMBtu/hr ceramic-metallic hybrid High Temperature Burner-Duct-Recuperator (HTBDR) system to recover energy from hot (up to 2500{degrees}F), dirty, and corrosive glue gas streams and preheat combustion air up to 2000{degrees}F. To reduce the cost and size of the ceramic recuperator, ceramic tubes with internal cruciform baffles were developed. The HTBDR system was tested on a 20 MMBtu/hr rotary forging furnace for about 2000 hours. To facilitate tube replacements, final design configuration uses horizontally mounted tubes. A maximum air preheat temperature of about 1916{degrees}F was achieved with a flue gas temperature of 2122{degrees}F. This represents fuel savings of about 30 to 50 percent (depending upon the amount of excess air) compared with an unrecuperated furnace. The overall design and operation of the recuperator proved to be successful up to the time of material failure. X-ray diffraction of some failed components indicated that there was some residual Silicon in the interior regions and complete nitriding did not occur during the fabrication process. Degradation of failed components was probably caused by oxidation of residual Silicon and by the stresses caused due to different coefficient of thermal expansion of various compounds during thermal cycling. A combination of severe and numerous thermal cycling coupled with incomplete nitriding was the most likely cause of material failure. 22 refs., 12 figs., 4 tabs.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls, ID (USA)
- Sponsoring Organization:
- DOE/CE
- DOE Contract Number:
- AC07-76ID01570; FC07-81ID12170
- OSTI ID:
- 5653205
- Report Number(s):
- EGG-M-36387; CONF-880724--29; ON: DE90002082
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-temperature burner-duct-recuperator (HTBDR) development and demonstration: Final report for the period October 1981-September 1987
High-temperature ceramic recuperator and combustion air burner programs. Final report, April 1981-October 1983
Related Subjects
010800 -- Coal
Lignite
& Peat-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
CERAMICS
EFFICIENCY
ENERGY EFFICIENCY
ENERGY RECOVERY
ENERGY TRANSFER
FIELD TESTS
FLUE GAS
GASEOUS WASTES
HEAT EXCHANGERS
HEAT RECOVERY
HEAT TRANSFER
RECOVERY
TESTING
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES