a) Find the inlet and outlet velocities.
b) Find the change in kinetic energy (J/sec).
c) Find the change in potential energy (J/sec).
d) Find the enthalpy change (ΔĤ) for vaporization at 77 Kelvin (J/sec).
e) Find the enthalpy change (ΔĤ) for gas heating from 77 K to 200 K (J/kg).
f) Use a 1st law energy balance to find Q, the energy that induces vaporization in this system (J/sec).
4
Point B, cross-sectional area = 1 m^2, P = 100,000 Pascals abs, 200 Kelvin.
Nitrogen (N2) liquid is piped up from a tank through adiabatic tubing to a bath that stores cryogenic vaccine. Nitrogen leaves the system as a gas.
I kg N/hr
Tc = 126.2
Pc = (n/V)c = 11,135.857
Nitrogen = 3,434,917.5 Kelvin Pascals mol/m^3
20 meters
AH = 200,000 vap, 77 K, 101,325 Pa
OCE-LINE!!!
Point A, cross-sectional area = 0.0003 m^2, P = 500,000 Pascals abs, 77 Kelvin.
Nitrogen (N2) GAS heat capacity in J/(kgKelvin) (T is in Kelvin) = 1,035.2 + 0.0662T + 0.00034455T^2 + 0.00000059412T^3 + 4,178.6/(T^2)