Process Equipment and Plant Design
The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles?

To increase the residence time of shell side fluid
To reduce the induced vibration in the tubes
To provide support to the tube bundle
To increase the tube side heat transfer co-efficient by inducing turbulence

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Process Equipment and Plant Design
In a vertical short tube evaporator (Calendria type), the

Tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylinderical drum dia of 1-6 metres are normally used
Liquor is inside the tube while the steam is outside the tube
Area of central downtake is equal to 40 to 100% of total cross-sectional area of the surrounding tube
All of these

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