Radiative transfer in circulating fluidized bed furnaces

• Three methods of estimating Ihe effective emissivily of a gas-particle suspension are eoml~ared and the radiative heat transfer coefficientof an isothermal suspension is defined. Heat flux measurements obtained from circulating fluidized bed comhustors are examined. Radiationfrom a particle suspension with core temperature dominates the radiative heat transfer in the upper part of the furnace, where the particledensity is low and no substantial particle boundary layers are formed. Over the lower pails of the heat transfer surfaces, where significantthermal and particle boundary layers are present, the radiative heat flux is dominated by emission from the relatively low temperature particlelayer in the vicinity of the heat receiving surface.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Energiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Energy Engineering (hsv//eng)

Nyckelord

Radialive heal transfer

Heal transfer

Circulating fluidized beds

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art (ämneskategori)

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