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scjorge1-Visitor
1-Visitor
October 28, 2018
Solved

Solve 2 equation system

  • October 28, 2018
  • 1 reply
  • 1520 views

Hi guys!

I am a totally beginner in MathCAD and trying to solve a system of two equations.

 

On one hand I have volume as a function of Pressure (V=f(Ps)) and other known parameters.

Then I have two equations of compressor Head, one as a function of Ps (and other known parameters) and the other as a function of Volume again. So I could equal both equations of Head and have one equation with two variables V and Ps.

 

The thing is I can't find how to find Ps and/or V to satisfy the equations...

Many thanks.MathCAD M4_snap.JPG

Best answer by Werner_E

One way to do it is to turn Volume, Head, etc. into functions of the so far unknown Ps and then use one of Primes numerical methods to solve the equation Head_2 = Head/1000 for Ps.You may either use the "root" command or a solve block.

See both methods in the attached file (Prime 5 format)

B.png

1 reply

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Werner_E25-Diamond IAnswer
25-Diamond I
October 28, 2018

One way to do it is to turn Volume, Head, etc. into functions of the so far unknown Ps and then use one of Primes numerical methods to solve the equation Head_2 = Head/1000 for Ps.You may either use the "root" command or a solve block.

See both methods in the attached file (Prime 5 format)

B.png

    S
    scjorge1-VisitorAuthor
    1-Visitor
    October 28, 2018

    Werner_E thanks a lot for the solution.

     

    It is exactly what I needed!

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