The discussion clarifies the configuration of a two-pass shell and tube heat exchanger, specifically one with 70 tubes, each 25mm in diameter and 6m in length. It is established that the heat exchanger contains a total of 140 tubes due to the two-pass design, where the working fluid traverses through one set of tubes, makes a U-turn, and returns through the second set. This configuration enhances the effective heat transfer area between the two fluids, optimizing the heating process.
PREREQUISITESMechanical engineers, thermal system designers, and students studying heat exchanger technology will benefit from this discussion, particularly those focusing on optimizing thermal performance in industrial applications.
Ok got it. Thanks!Nidum said:A two pass heat exchanger has two sets of tubes . Working fluid first goes through one set of tubes then does a U turn and comes back through the other set of tubes . So the working fluid passes through the heat exchanger twice . Hence the description two pass .
U r correct if u cut the capsule shell u will see 140 tubes. The configuration is as what Nidum said, it makes a U turn. This is to increase effective area in which the two fluids interect.Janiceleong26 said:I see. Meaning there will be a total of 140 tubes in the heat exchanger? But wouldn't that be 140 tube passes? I'm confused as to what is the difference between 'tube pass' and 'tube'
Nidum said:A two pass heat exchanger has two sets of tubes . Working fluid first goes through one set of tubes then does a U turn and comes back through the other set of tubes . So the working fluid passes through the heat exchanger twice . Hence the description two pass .