It is desired to concentrate a 20% salt solution (20 kg of salt in 100 kg of solution) to a 30% salt solution in an evaporator. Consider a feed of 300 kg/min at 30°C. The boiling point of the solution is 110°C, the latent heat of vaporisation is 2100 kJ/kg and the specific heat of the solution is 4 kJ/kg.K. The rate at which the heat has to be supplied in (kJ/min) to the evaporator is____________________?

Related Mcqs:

‘Duhring’s plot’ is of use in_________________?

A. Extractive distillation B. Evaporation C. Leaching D. Absorption...

For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it________________?

A. Occupies smaller space B. Is more economical C. Is easy to operate and maintain D. All A., B. and C....

In case of a multipass shell and tube heat exchanger, the temperature drop in the fluid _______________?

A. Is inversely proportional to the resistance across which the drop occurs B. And the wall are proportional to individual resistances C. And the wall is not related D. None of these...

In forced convection, the heat transfer depends on _______________?

A. Re, Pr B. Re, Gr C. Mainly Gr D. Re only...

Sensible heat of hot industrial flue gases cannot be recovered by a/an________________?

A. Economiser B. Regenerator C. Ceramic recuperator D. None of these...