Engineering, 12.03.2020 06:37 TKwan
(20pts) A thermocouple junction, which may be approximated as sphere, is to be used for temperature measurement in a gas stream. The convection coefficient between the junction surface and the gas is h = 400 W/m2·K and the junction thermophysical properties are k = 20 W/m·K, c = 400 J/kg·K and rho = 8500 kg/m3. Determine the junction diameter needed for the thermocouple to have a time constant of 2 s. If the junction is at 25 °C and is placed in a gas stream that is at 200 °C, estimate the temperature of the junction after 10 minutes.
Answers: 3
Another question on Engineering
Engineering, 04.07.2019 18:10
Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86
Answers: 2
Engineering, 04.07.2019 18:10
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
Engineering, 04.07.2019 18:10
Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa
Answers: 1
Engineering, 04.07.2019 18:20
Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false
Answers: 2
You know the right answer?
(20pts) A thermocouple junction, which may be approximated as sphere, is to be used for temperature...
Questions
English, 08.11.2019 19:31
Mathematics, 08.11.2019 19:31
English, 08.11.2019 19:31
Health, 08.11.2019 19:31
Mathematics, 08.11.2019 19:31
Mathematics, 08.11.2019 19:31
History, 08.11.2019 19:31
Mathematics, 08.11.2019 19:31
