Calc Air Pressure in Tank with Fluid Level & Height

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Homework Help Overview

The discussion revolves around calculating the headspace pressure in a closed tank partially filled with fluid. The problem involves understanding the relationship between fluid height, pressure, and the air above the fluid in the tank, with specific values provided for fluid specific gravity and heights.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the use of hydrostatic pressure and question the relevance of Boyle's law in the context of the problem. There are attempts to clarify the definitions and implications of the given heights and pressures.

Discussion Status

The discussion is ongoing, with participants providing guidance on the interpretation of pressure in relation to fluid height. Some participants express confusion about the setup and the implications of the given values, while others attempt to clarify the relationships between them.

Contextual Notes

There is uncertainty regarding the interpretation of the heights provided and how they relate to the pressure calculations. Participants note the unconventional setup and the need for clarity on the problem statement and assumptions made.

  • #31
jderulo said:
58860N.m^-2 ? Assuming a head of 5m?
Yes. That's the air pressure in the tank headspace (over and above atmospheric pressure).

Chet
 
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  • #32
Thanks Chet - I had that value earlier, was you trying to see if I understood it?

The y value, the 1.7m - seems odd that I do not include that. I always thought we had to use all the data in chem eng problems. At least I have in the past!
 
  • #33
jderulo said:
Thanks Chet - I had that value earlier, was you trying to see if I understood it?

The y value, the 1.7m - seems odd that I do not include that. I always thought we had to use all the data in chem eng problems. At least I have in the past!
Why do you think they put the y into the problem description?
 
  • #34
Chestermiller said:
Why do you think they put the y into the problem description?
Not really sure can only assume it would make the solution glaringly obvious if it wasn't there...?
 
  • #35
jderulo said:
Not really sure can only assume it would make the solution glaringly obvious if it wasn't there...?
Exactly.
 

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