Heat transfer mechanism with thin filaments including ceramic high temperature heat exchanger

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869556

Im, Kwan H ^[1]; Ahluwalia, Rajesh K ^[2]

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1. Naperville, IL
2. Burr Ridge, IL

A radiative heat transfer mechanism in a furnace 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.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31109-ENG-38
• Assignee: University of Chicago (Chicago, IL)
• Patent Number(s): US 5355843
• OSTI ID: 869556
• Country of Publication: United States
• Language: English

Related Subjects

heat
transfer
mechanism
filaments
including
ceramic
temperature
exchanger
radiative
furnace
burners
pulverized
coal
air
burned
producing
combustion
gases
contaminants
plurality
elongated
conduits
positioned
inside
proximate
parallel
flow
hollow
diameters
range
micrometer
000
micrometers
infrared
radiation
cross-section
sufficient
exposure
blower
associated
limiting
amount
soot
ash
deposit
preserve
convective
energy
radiative heat
positioned inside
heat energy
pulverized coal
heat exchange
heat exchanger
heat transfer
infrared radiation
combustion gases
combustion gas
temperature heat
transfer mechanism
including ceramic
hollow conduit
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