Engineering, 21.04.2020 17:48 lil2524

In an experiment, the temperature of a hot gas stream is to be measured by a thermocouple with a spherical junction. Due to the nature of this experiment, the response time of the thermocouple to register 42 percent of the initial temperature difference must be within 5 s. The properties of the thermocouple junction are k = 35 W/m•K, rho = 8500 kg/m3, and cp = 320 J/kg•K. If the heat transfer coefficient between the thermocouple junction and the gas is 250 W/m2•K, determine the diameter of the junction.

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In an experiment, the temperature of a hot gas stream is to be measured by a thermocouple with a sph...