DESIGNING A FURNACE.pptx

8/13/2019 DESIGNING A FURNACE.pptx

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DESIGNING A FURNACE


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Aspects involved in heating a fluid are:

Combustion(heat available in the fluegases)

Thermal(heat balances ,heat transfer)

Hydro dynamic(pressure drop)

Mechanical(temp. and pressure behavior,tube bundle support & outside forces )


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Determining heat exchange

surfaces

Heat exchange surface areacalculations are based in 2 types:

Thermal balance

Heat transfer laws


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1.Thermal balance


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2.Heat transfer laws

Radiation

Convection

Conduction


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A . Radiation


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B . Convection

The transfer of heat between a fluid and wallwith a relative movement of the fluid with

respect to the wall.


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C . Conduction


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1. Radiation


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2 C ti


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2.Convection


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Shut down conditions in case of emergency

are:


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Thank you

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DESIGNING A FURNACE.pptx