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LOX Mechanical Design
Overview:
For more specifications please download the FreeCad File:
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