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Heat Transfer

Q1:

A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires

A less heating surface.

B more space.

C lower maintenance cost.

D none of these.

ANS:B - more space.

Comparing a concentric double pipe heat exchanger to a shell and tube heat exchanger for the same heat load:

  1. Less heating surface: Typically, a concentric double pipe heat exchanger would require more heating surface compared to a shell and tube heat exchanger for the same heat load. Shell and tube heat exchangers generally have a larger surface area available for heat transfer due to their design, which allows for more efficient heat transfer.
  2. More space: Concentric double pipe heat exchangers are often more compact compared to shell and tube heat exchangers for the same heat load. Shell and tube heat exchangers tend to occupy more space due to their larger size and configuration.
  3. Lower maintenance cost: Concentric double pipe heat exchangers generally have simpler designs with fewer components compared to shell and tube heat exchangers. This simplicity can often translate to lower maintenance costs, as there are fewer parts to inspect, clean, and repair.
So, among the options provided, none of these statements fully apply. Each type of heat exchanger has its own advantages and disadvantages depending on factors such as space availability, required heating surface, and maintenance considerations.



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