Question

In: Mechanical Engineering

3.- In an industrial process, a concentric tube exchanger is used to cool 1800 Kg /...

3.- In an industrial process, a concentric tube exchanger is used to cool 1800 Kg / hr of ammonia from 80 ° C to 35 ° C circulating through the annular space, with 1485 Kg / hr of water entering the concentric tube at 25 ° C. The water leaving the exchanger is sent to a mixing tank with agitation, which is fed by another stream of water at 15 ° C in order to reduce its temperature to 25 ° C and reuse it in the heat exchanger. Considering that the specific heat of ammonia is a function of temperature, how many Kg / hr should water be supplied to the mixing tank at 15 ° C?

Solutions

Expert Solution

Heat exchanger problem is solved by energy balance.

Since specific heat of ammonia is vary with temperature.so, specific heat of ammonia is taken as mean of inlet and outlet temperature.

samet mamat answered 1 year ago
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