Question

The temperature of a flowing gas stream is measured using a thermocouple, which is a spherical metal bead 1.5 mm in diameter. The properties of the metal are p = 9000 kg/m Cp = 550 J/kg . K and k=30 W/ mK The film coefficient between the gas and the metal is 410 W/ mK. If the gas temperature is suddenly increased from 300 C to 310 °C, how long will it take for the thermocouple to reach 308 C? a) 5 s b). 2.56 s c) 3.55 s d) 4.95 s​

Answer 1

Answer:

The temperature of a flowing gas stream is measured using a thermocouple, which is a spherical metal bead 1.5 mm in diameter. The properties of the metal are p =9000 kg/m.