Two products enter an indirect contact heat exchanger that uses steam for heating. The first product which contains 12% 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 150 °C (hL = 2745.9 kJ/kg, hy = 632.25 k.l/kg) enters the heat exchanger at 0.5 kg/hr with a quality of 95% and exits at 10% quality. 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 24% solids and exits at 2 kg/hr and at 10 °C, while the second stream exits at 12 °C. The specific heat of the solids is 3500 J/kg K and that of water is 4180 J/kg K. Complete/label the process diagram and determine the following: a. Specific heat of each stream b. Enthalpy of entering and exiting steam c. Temperature of the mixture exiting the indirect contact heat exchanger, and d. Mass flow rate of the water used in the indirect contact cooler.

Two products enter an indirect contact heat exchanger that uses steam for heating. The first product which contains 12% 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 150 °C (hL = 2745.9 kJ/kg, hy = 632.25 k.l/kg) enters the heat exchanger at 0.5 kg/hr with a quality of 95% and exits at 10% quality. 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 24% solids and exits at 2 kg/hr and at 10 °C, while the second stream exits at 12 °C. The specific heat of the solids is 3500 J/kg K and that of water is 4180 J/kg K. Complete/label the process diagram and determine the following: a. Specific heat of each stream b. Enthalpy of entering and exiting steam c. Temperature of the mixture exiting the indirect contact heat exchanger, and d. Mass flow rate of the water used in the indirect contact cooler.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.49P

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