Central vessel:
Treating as a cylinder
11.9 inch radius
11 inch height
V = pi*r^2*h = 4900 in^3 = 0.080 m^3
SA = 2*pi*r*h + 2*pi*r^2 = 1,700 in^2 = 1.1 m^2
End cube:
Treating as a cube, even though the inside is more spherical
L = 10 in
V = L^3 = 1,000 in^3 = 0.016 m^3
SA = 6*L^2 = 600 in^2 = 0.39 m^2
Tubes:
4 inch radius
275 in height (two 10 ft tubes + 1 ft T = 6.4 m, round up to 7 m including gate valve, reducer, etc)
V = pi*r^2*h = 13,800 in^3 = 0.23 m^3
SA = 2*pi*r*h = 6,900 in^2 = 4.5 m^2
Total:
Vessel + 5 Cubes + 2.1 Tubes (power recylcer ~0.7m):
V = 0.643 m^3 = 643 L
SA = 12.5 m^2
Assumed desorption: 1e-8 mbar*l/(s*cm²)
Assumed leak rate: 3e-9 mbar*l/s
Can then figure out what pumps and how many to use using the calculator