Question

# Two products enter an indirect contact heat exchanger that uses steam for heating. The first product...

Two products enter an indirect contact heat exchanger that uses steam for heating. The first product which contains 15% solids enters at the rate of 3 kg/hr and at 10 °C. The second stream which contains 20% solids enters at the rate of 4 kg/hr and at 20 °C. Saturated steam at 140 °C enters the heat exchanger at 0.5 kg/hr with a quality of 95% and exits at 10% quality at 140 °C. The resulting mixture enters an indirect contact cooler. Water enters the indirect contact cooler at a temperature of 10 °C and exits at 25 °C. Two product streams exit the cooler. The first stream contains 25% solids and exits at 2 kg/hr and at 30 °C. If the second stream exits at 40 °C, write down all the equations (including those to determine specific heats

and enthalpies) that can be used to determine:

a. The temperature of the product entering the cooler

b. The mass flow rate of the cold water cp (solids) = 4000 J/kg K
cp (water) = 4200 J/kg K

DO NOT SOLVE THE EQUATIONS. Just need help setting up equations. Thanks!

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