Consider a double pipe parallel flow heat exchanger of length L The inner and outer diameters of the inner tube are D 1 and D 2 , respectively, and the inner diameter of the outer tube is D 3 Explain how you would determine the two heat transfer surface areas A i and A o When is it reasonable to as...

The heat transfer surface ar ...

Consider a double-pipe parallel-flow heat exchanger of length L. The inner and outer diameters of the inner

Question:

Consider a double-pipe parallel-flow heat exchanger of length L. The inner and outer diameters of the inner tube are D₁ and D₂, respectively, and the inner diameter of the outer tube is D₃. Explain how you would determine the two heat transfer surface areas A_i and A_o. When is it reasonable to assume A_i ≈ A_o ≈ A_s?