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LOX Mechanical Design

Overview:

For more specifications please download the FreeCad File:

LOX FreeCad Design (.FCStd)

Cooler Design:

The cooler is presented by a tunned refrigerator by adding seven cooling tubes inside it.

For more information check this report:

310821_ICPT_LOXPrototype(.docx)

 

  • Calculation pressure of pipes

Equation: P = (2*S*T)/((O.D.-2*T)*SF)

Where:

   P = Fluid Pressure (psi)

           T = Pipe wall thickness (in)

           O.D. = Pipe outside diameter (in)

           Sf = Safety factor (General Calculations 1.5 – 10, Use 1 For Bursting Pressure)

           S = Material strength (psi)

 

Ultimate Tensile strength or Yield strength can be used.

Ultimate should be used to determine the bursting pressure.

Yield can be used for estimating pressures at which permanent deformation begins.

1Mpa=144.55psi

 

In our case, We have 2 types of pipes: one made of aluminum (Al) and the other of copper (Cu). In the table below, information about these two types of pipes

Material

Aluminum (Al)

Copper (Cu)

O.D. [in]

0.3228

0.37874

T [in]

0.037385

0.047244

S [psi]

1450.3774

30457.9262

Sf min

1.5

1.5

Sf max

10

10

P [psi] (Sf min)

655.84

15186.75

P [psi] (Sf max)

4372.24

101244.97

P [bar] (Sf min)

45.22

1047.09

P [bar] (Sf max)

301.46

6980.60

Aluminum Pipe Equations Formulas Design Calculator [1]

[1] https://www.ajdesigner.com/phpaluminumpipe/pressure_rating_equation.php#ajscroll

Solving for pressure rating

Note:
 Under most cases, S = 7500 pound/inch2 for aluminum