GA3 Heat Exchanger Design

Constraints

Direct

• Total pipe length Nt*lt < 3.5m
• Total length lt+2*l_plenum<0.35m
• Total mass m<1.10kg

Indirect

• plenum length must fit nozzles
  • 1-pass design has both plenum lengths lp>=0.04 -> lt<=0.27 so Nt>=13
  • 2-pass design has plenum lengths lp1>=0.04, lp2 unconstrained -> lt<=0.34 so Nt>=11
• tube pitch must be greater than tube diameter Y>=DO, restricts number of tubes Nt to 47