Converting Ethanol to Ethylene & Double Heat Exchanger Questions Numerical values for question 2 please. Specific explanation on each of them. Images/illus

Converting Ethanol to Ethylene & Double Heat Exchanger Questions Numerical values for question 2 please. Specific explanation on each of them. Images/illustrations if applicable. The process of heat exchange between two fluids that are at different temperatures (a “hot fluid”
and a “cold fluid”) and are separated by a solid wall takes place in many engineering applications.
Such devices are called heat exchangers. One of the simplest types is the double-pipe heat
exchanger, which consists of two concentric tubes, as shown in the figure. It is customary to run
double-pipe heat exchangers in countercurrent flow, there is, with the two fluids flowing in
opposite directions.
You are designing a process to convert ethanol into ethylene via dehydration. In a meeting with
other engineers, it is suggested that, prior to entrance in the reactor, the ethanol should be pre-
heated to 70°C to ensure it reaches the reactor temperature quickly.
1) Your job is to design a double-pipe heat exchanger that can carry out this task by
exchanging heat with steam.
2) Designing the heat exchanger involves determining the material and dimensions for
the two pipes (length, pipe nominal size, schedule), as well as the inlet and outlet mean
temperatures for both fluids. The convection coefficients need to be calculated via
correlations (no assumed values). Assume that you need to heat up 3,000 kg/h of
ethanol.

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