Heat Transfer
Use of transverse baffles in a shell and tube heat exchanger is done to increase the

Rate of heat transfer
Flow velocity
Turbulence of shell side fluid
All of these

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Heat Transfer
The advantage of backward feed multiple effect evaporators over forward feed units is that

Heat sensitive material can be handled
Equal heat transfer co-efficients exist in various effects
Most concentrated liquid is at highest temperature
There is no additional cost of pumping

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