Heat transfer mechanism with thin filaments including ceramic high temperature heat exchanger
A radiative heat transfer mechanism in a furnace is described having burners through which pulverized coal and air are burned producing combustion gases and contaminants. A plurality of elongated conduits are positioned inside the furnace proximate to the burners generally parallel to the flow of combustion gases in the furnace. A plurality of thin filaments are inside each of the elongated hollow conduits, the filaments having diameters in the range of from about 1 micrometer to about 1,000 micrometers and having an infrared radiation cross-section sufficient to cause the filaments to heat upon exposure to infrared radiation. Blower mechanism is associated with the elongated conduits for limiting the amount of soot and ash which deposit on the conduits to preserve the radiative and convective transfer of heat energy from the combustion gases to the conduits. 7 figs.
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Univ. of Chicago, IL (United States)
- Patent Number(s):
- A; US 5355843
- Application Number:
- PPN: US 8-090766
- OSTI ID:
- 6901031
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
014000* -- Coal
Lignite
& Peat-- Combustion
BLOWERS
CARBONACEOUS MATERIALS
CERAMICS
CHEMICAL REACTIONS
CLEANING
COAL
COMBUSTION
COMBUSTORS
ENERGY SOURCES
ENERGY TRANSFER
FIBERS
FOSSIL FUELS
FUELS
HEAT TRANSFER
MATERIALS
OXIDATION
PULVERIZED FUELS
THERMOCHEMICAL PROCESSES
TUBES