Engineering, 12.08.2020 06:01, queenbee2994
A thermocouple junction with a diffuse and gray surface is placed in a large environment of temperature at T. The junction is used to measure the temperature of a moving fluid surrounding the surface. The heat transfer coefficient is h. The total hemispherical irradiation from the environment incident on the small surface is. The total hemispherical emissivity of the surface is 0.95. Determine the following:
A) What is the radiation energy incident on the surface per unit time (q_irra)?
B) What is the total hemispherical absorptivity alpha?
C) What is the radiation energy absorbed by the surface per unit time q_abs?
D) If after steady state, the temperature of the junction senses a temperature of 320 K, what is the total hemispherical emitted power E from the junction surface?
E) What is the radiation energy emitted from the junction surface per unit time q_emit?
F) Apply energy balance to the junction after steady state. Neglect the contribution from the thermocouple wires. Calculate the temperature of the fluid. What is the major reason that the temperature of the fluid cannot be accurately measured by the thermocouple junction?
Answers: 2
Engineering, 04.07.2019 18:10, Tyrant4life
Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.
Answers: 1
Engineering, 04.07.2019 18:10, oliviasoreo92
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 18:10, 0436500
Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
Answers: 1
Engineering, 04.07.2019 18:20, aly95
An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid
Answers: 3
A thermocouple junction with a diffuse and gray surface is placed in a large environment of temperat...
Biology, 03.12.2021 07:10
Mathematics, 03.12.2021 07:10
English, 03.12.2021 07:10
Mathematics, 03.12.2021 07:10
Mathematics, 03.12.2021 07:10