uzairsyedahmed
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- Joined
- May 16, 2013
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I solved this using the approach that the mass requirement by the three tools (31.something lbm/min) with intake of 21.6 lbm/min creates a deficit. The tank has 1500+ lbm which will provide for this till it runs out.
My answer came out to be different from the book. I dont understand the approach lindeburg is using for this problem. I understand the tank is at a higher pressure (314 psia) vs (104psi) required by the tool, but wouldn't mass balance be the way to go here as regardless of pressure, the mass and mass flow requirement of the tools would be the same.
The solution manual calculates the mass in tank at 104 psia and then subtracts this by the total mass in tank (at 314 psi) and then divides by the deficit i calculated above. I really dont understand this approach. Appreciate if someone can put some light on it.
My answer came out to be different from the book. I dont understand the approach lindeburg is using for this problem. I understand the tank is at a higher pressure (314 psia) vs (104psi) required by the tool, but wouldn't mass balance be the way to go here as regardless of pressure, the mass and mass flow requirement of the tools would be the same.
The solution manual calculates the mass in tank at 104 psia and then subtracts this by the total mass in tank (at 314 psi) and then divides by the deficit i calculated above. I really dont understand this approach. Appreciate if someone can put some light on it.
