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Follow the standard energy balance steps to determine the water condensed and the heat removed from a humid air stream. The feed stream contains 18 wt% water (balance is air), has a temperature of 200°C and a pressure of 1 atm. The exit gas stream is at 1 atm and 30°C. The exit vapor composition should be determined from the psychrometric chart (saturated). The heat of vaporization of water at 30°C is 43.8 kJ/mol. a. Draw a picture and label appropriately (Basis: 1 kg/s feed). b. Perform a degree of freedom analysis. c. Write appropriate equations. d. Complete all material balances. e. Specify reference states.

Follow the standard energy balance steps to determine the water condensed and the heat removed from a humid air stream. The feed stream contains 18 wt% water (balance is air), has a temperature of 200°C and a pressure of 1 atm. The exit gas stream is at 1 atm and 30°C. The exit vapor composition should be determined from the psychrometric chart (saturated). The heat of vaporization of water at 30°C is 43.8 kJ/mol. a. Draw a picture and label appropriately (Basis: 1 kg/s feed). b. Perform a degree of freedom analysis. c. Write appropriate equations. d. Complete all material balances. e. Specify reference states.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Follow the standard energy balance steps to determine the water condensed and the heat removed from a humid air stream. The feed stream contains 18 wt% water (balance is air), has a temperature of 200°C and a pressure of 1 atm. The exit gas stream is at 1 atm and 30°C. The exit vapor composition should be determined from the psychrometric chart (saturated). The heat of vaporization of water at 30°C is 43.8 kJ/mol. a. Draw a picture and label appropriately (Basis: 1 kg/s feed). b. Perform a degree of freedom analysis. c. Write appropriate equations. d. Complete all material balances. e. Specify reference states. f. Construct and fill out enthalpy table. Define variables for unknown enthalpies. Species/Phase min (kg/s) H₂O (v) Air (g) H₂O (1) g. Determine unknown enthalpies. ĤIn (kJ/mol) mout (kg/s) Hout (kJ/mol)
Transcribed Image Text:Follow the standard energy balance steps to determine the water condensed and the heat removed from a humid air stream. The feed stream contains 18 wt% water (balance is air), has a temperature of 200°C and a pressure of 1 atm. The exit gas stream is at 1 atm and 30°C. The exit vapor composition should be determined from the psychrometric chart (saturated). The heat of vaporization of water at 30°C is 43.8 kJ/mol. a. Draw a picture and label appropriately (Basis: 1 kg/s feed). b. Perform a degree of freedom analysis. c. Write appropriate equations. d. Complete all material balances. e. Specify reference states. f. Construct and fill out enthalpy table. Define variables for unknown enthalpies. Species/Phase min (kg/s) H₂O (v) Air (g) H₂O (1) g. Determine unknown enthalpies. ĤIn (kJ/mol) mout (kg/s) Hout (kJ/mol)
h. Determine O. Please give your answer in kW. -10 S 65 Enthalpy At Saturation, kJ/kg Dr 0 °C Wet Bulb or Saturation Tempera 10 12 +0.2 45 50 55 60 is 09 2 20 2 2. 8- 8 105 -9 Dry Bulb Temperature, "C 0.90 50 0.031 0.030 €0.029 0.028 0.027 0.026 E0.025 -0.024 €0.023 €0.021 E-0.020 0.019 €0.018 0.017 0.95 0.016 0.015 0.014 0.013 0.012 0.011 0.010 0.009 0.008 -0.007 0.006 0.005 0.004 0.003 0.002 0.001 -0.00 55 Moisture Content, kg/kg Dry Air 0.75 0.80 0.85 Below 0°C Properties and Enthalpy Deviation Lines Are For Ice Humid Volume, m³/kg Dry Air FIGURE 8.4-1 Psychrometric chart-SI units. Reference states: H₂O (liquid, 0°C, 1 atm), dry air (0°C, 1 atm). (Data obtained from Carrier Corporation.)
Transcribed Image Text:h. Determine O. Please give your answer in kW. -10 S 65 Enthalpy At Saturation, kJ/kg Dr 0 °C Wet Bulb or Saturation Tempera 10 12 +0.2 45 50 55 60 is 09 2 20 2 2. 8- 8 105 -9 Dry Bulb Temperature, "C 0.90 50 0.031 0.030 €0.029 0.028 0.027 0.026 E0.025 -0.024 €0.023 €0.021 E-0.020 0.019 €0.018 0.017 0.95 0.016 0.015 0.014 0.013 0.012 0.011 0.010 0.009 0.008 -0.007 0.006 0.005 0.004 0.003 0.002 0.001 -0.00 55 Moisture Content, kg/kg Dry Air 0.75 0.80 0.85 Below 0°C Properties and Enthalpy Deviation Lines Are For Ice Humid Volume, m³/kg Dry Air FIGURE 8.4-1 Psychrometric chart-SI units. Reference states: H₂O (liquid, 0°C, 1 atm), dry air (0°C, 1 atm). (Data obtained from Carrier Corporation.)
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