Engineering, 05.05.2020 04:38 angellynn50

The moisture in hot, humid, stagnant air surrounding a cold-water pipeline continually diffuses to the cold surface where it condenses. The condensed water forms a liquid film around the pipe, and then continuously drops off the pipe to the ground below. At a distance of 10 cm from the surface of the pipe, the moisture content of the air is constant. Close to the pipe, the moisture content of the air approaches the vapor pressure of water evaluated at the temperature of the pipe.
a. Draw a picture of the physical system, select the coordinate system that best describes the transfer process, and state at least five reasonable assumptions of the mass-transfer aspects of the water condensation process.
b. What is the simplified form of the general differential equation for mass transfer in terms of the flux of water vapor, NA?
c. What is the simplified differential form of Fick’s equation for water vapor, NA?
d. What is the simplified form of the general differential equation for mass transfer in terms of the concentration of water vapor, cA?

Answers: 3

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.

Answers: 2

Answer

Engineering, 04.07.2019 19:10

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?

Answers: 2

Answer

Engineering, 04.07.2019 19:20

Apure substance is a)-mixture of various chemical elements or compounds b)-substance that has a fixed chemical composition throughout c)-mixture that is homogeneous (such as air) d)-all the answers

Answers: 3

Answer

Engineering, 06.07.2019 02:30

Air (c-1.006 kj/kg.k, r-0.287 kj/kg.k) enters a nozzle steadily at 280 kpa and 77°c with a velocity of 50 m/s and exits at 85 kpa and 320 m/s. the heat losses from the nozzle to the surrounding medium at 20°c are estimated to be 3.2 kj/kg. determine (a) the exit temperature and (b) the total entropy change for this process. solve this problem using constant specific heats.

Answers: 1

Answer

You know the right answer?

The moisture in hot, humid, stagnant air surrounding a cold-water pipeline continually diffuses to t...

Questions