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Transient-(Unsteady-State-Heat-Conduction)

A rmocouple junction of spherical form is to be used to measure temperature of gas stream. The junction is at 20 degree Celsius and is placed in a gas stream which is at 200 degree Celsius. Make calculations for junction diameter needed for rmocouple to have rmal time constant of one second. Assume rmos-physical properties as given below
k = 20 W/ m K
h = 350 W/m2 K
c = 0.4 k J/kg K
p = 8000 kg/m3


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A rmocouple junction of spherical form is to be used to measure temperature of gas stream. The junction is at 20 degree Celsius and is placed in a gas stream which is at 200 degree Celsius. Make calculations for junction diameter needed for rmocouple to have rmal time constant of one second. Assume rmos-physical properties as given below
k = 20 W/ m K
h = 350 W/m2 K
c = 0.4 k J/kg K
p = 8000 kg/m3

The lumped parameter solution for transient conduction can be conveniently stated as

A thermocouple junction of spherical form is to be used to measure the temperature of the gas stream. The junction is at 20 degree Celsius and is placed in a gas stream which is at 200 degree Celsius. Make calculations for junction diameter needed for the thermocouple to have thermal time constant of one second. Assume the thermos-physical properties as given below k = 20 W/ m K h = 350 W/m2 K c = 0.4 k J/kg K p = 8000 kg/m3

Transient (Unsteady State Heat Conduction)

Heat-Transfer