A common process for increasing the moisture content of air is to bubble it through a column of water. The air bubbles are assum
ed to be spheres having a radius of 1.0mm, and are in thermal equilibrum with the surrounding water at 298K. The vapor pressure of water is 0.03 atm at 298K, and the total pressure of the gas inside the air bubble is 1.0 atm.
a) Draw a picture of the physical system and list at least five reasonable assumptions for the mass transfer aspects of the water evaporation process. State what coordinate system should be used.
b)What are the simplified differential forms of Fick's flux equation for water vapor (species A) and the general differential equation for mass transfer in terms of concentration cA ?
c) Propose reasonable boundary and initial conditions
a) Draw a picture of the physical system and list at least five reasonable assumptions for the mass transfer aspects of the water evaporation process. State what coordinate system should be used.
b)What are the simplified differential forms of Fick's flux equation for water vapor (species A) and the general differential equation for mass transfer in terms of concentration cA ?
c) Propose reasonable boundary and initial conditions
1 answer:
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Answer:
Suction and exhaust processes do not affect the performance of Otto cycle.
Explanation:
Step1
Inlet and exhaust flow processes are not including in the Otto cycle because the effect and nature of both the process are same in opposite direction.
Step2
Inlet process or the suction process is the process of suction of working fluid inside the cylinder. The suction process is the constant pressure process. The exhaust process is the process of exhaust out at constant pressure.
Step3
The suction and exhaust process have same work and heat in opposite direction. So, net effect of suction and exhaust processes cancels out. The suction and exhaust processes are shown below in P-V diagram of Otto cycle:
Process 0-1 is suction process and process 1-0 is exhaust process.
