How much time would the Pressure of both tanks be Equal?

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SUMMARY

This discussion focuses on calculating the time required for two tanks to reach equal pressure after transferring methane from Tank 1 to Tank 2. Tank 1 has a volume of 30L, a temperature of 40°C, and a pressure of 40 psi, while Tank 2 has a volume of 20L, a temperature of 25°C, and an initial pressure of 14.7 psi. The tanks are connected by a 2-inch diameter pipe, and the valve between them is initially closed. The relevant formulas include gas law, adiabatic expansion, and pressure drop calculations in pipes.

PREREQUISITES
  • Understanding of gas laws, particularly the ideal gas law.
  • Knowledge of adiabatic processes and their implications on gas behavior.
  • Familiarity with pressure drop calculations in fluid dynamics.
  • Basic principles of thermodynamics related to gas transfer.
NEXT STEPS
  • Research the ideal gas law and its application in pressure calculations.
  • Study adiabatic expansion and its effects on gas pressure and temperature.
  • Learn about pressure drop calculations in pipes, specifically for 2-inch diameter pipes.
  • Explore related engineering problems in fluid dynamics to gain practical insights.
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This discussion is beneficial for students and researchers in engineering, particularly those focusing on thermodynamics, fluid mechanics, and gas transfer processes.

John Mendoza
Hello, I need help for my thesis project.

Lets say We have two tanks. Tank 1 is filled with methane and Tank 2 is empty

Tank 1:
V = 30L
T = 40C
P = 40psi

Tank 2:
V = 20L
T = 25C
P = 14.7psi

Two tanks are connected by a pipe with 2inch diameter (a valve in the middle is closed at first). Then the valve will open, so that Tank 1 will transfer methane to Tank 2. Then HOW MUCH TIME will both tanks have the SAME PRESSUE?

What formula shall I use? Need help. Thanks
 

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Hello John, :welcome:

This may not be homework, but I think you may benefit from (at least mentally) using the template there to orser your thoughts and get effective assistance:

Homework Statement


well taken care of

Homework Equations


gas law, adiabatic expansion, pressure drop in a 2" pipe and/or in a contraction and an expansion

The Attempt at a Solution


your own ideas. Or you might look around for related threads in PF -- they definitely are here somewhere.

And -- not unimportant -- at what level do you do this ? For a PhD thesis the assistance might be somehaat more involved than for middle school... :smile:
 
John Mendoza said:
Hello, I need help for my thesis project.

Lets say We have two tanks. Tank 1 is filled with methane and Tank 2 is empty

Tank 1:
V = 30L
T = 40C
P = 40psi

Tank 2:
V = 20L
T = 25C
P = 14.7psi

Two tanks are connected by a pipe with 2inch diameter (a valve in the middle is closed at first). Then the valve will open, so that Tank 1 will transfer methane to Tank 2. Then HOW MUCH TIME will both tanks have the SAME PRESSUE?

What formula shall I use? Need help. Thanks
Welcome to the PF. :smile:

As mentioned, you need to post this schoolwork problem in the Homework Help, Engineering forum and fill out the Template that you are provided there when starting a new schoolwork thread.

This thread is locked.
 

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