The temperature of a flowing gas stream is measured using a bare thermocouple which is a spherical metal bead 1 2 mm in diameter The properties of the metal are 8,000 kg m 3 , c p 450 J kg K, and k 25 W m K The film coefficientbetween the gas and the metal is 310 W m 2 K If the gas temperature sudd...

To solve this problem we can use the following equation t Tf Ti hA Vcp where t i ...

The temperature of a flowing gas stream is measured using a bare thermocouple. which is a spherical

Question:

The temperature of a flowing gas stream is measured using a bare thermocouple. which is a spherical metal bead 1.2 mm in diameter. The properties of the metal are: ρ = 8,000 kg/m³, c_p = 450 J/kg · K, and k= 25 W/m · K. The film coefficientbetween the gas and the metal is 310 W/m²· K. If the gas temperature suddenly changes from 200°C to 210°C, how long will it take for the thermocouple to reach 209°C?

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