Follow the standard energy balance steps to determine the water condensed and the heat removed from a humid air stream. The feed stream contains 12 wt% water (balance is air), has a temperature of 250°C and a pressure of 1 atm. The exit gas stream is at 1 atm and 25°C. The exit vapor composition should be determined from the psychrometric chart (saturated). The heat of vaporization of water at 25°C is 44.0 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
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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Use the chart!!!
-5.
-10
15 20
-5
8
25
"0
Wet Bulb or Saturation Temperature, °C
5
+0.2
0
+0.4
+0.6
+0.8
10
+1.0
45
velalafate
15
Enthalpy At Saturation, kJ/kg Dry/
VOL
59
09
SS
os
-0.05
no
10-
2
75 80 85 90 95 100 105
20
25
15
Dry Bulb Temperature, °C
30
90%
80%
70%
60%
35
40%
30%
50% Relative Humidity
20%
40
10%
45
0.90
50
-0.031
-0.030
€0.029
0.028
0.027
€0.026
€0.025
0.024
-0.023
-0.022
0.021
€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
E-0.007
-0.006
0.005
0.004
0.003
€0.002
0.001
0.00
10
0.75
0.80
0.85
Humid Volume, m³/kg Dry Air
Below 0°C Properties and Enthalpy Deviation Lines Are For Ice
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.)
55
Moisture Content, kg/kg Dry Air
Transcribed Image Text:-5. -10 15 20 -5 8 25 "0 Wet Bulb or Saturation Temperature, °C 5 +0.2 0 +0.4 +0.6 +0.8 10 +1.0 45 velalafate 15 Enthalpy At Saturation, kJ/kg Dry/ VOL 59 09 SS os -0.05 no 10- 2 75 80 85 90 95 100 105 20 25 15 Dry Bulb Temperature, °C 30 90% 80% 70% 60% 35 40% 30% 50% Relative Humidity 20% 40 10% 45 0.90 50 -0.031 -0.030 €0.029 0.028 0.027 €0.026 €0.025 0.024 -0.023 -0.022 0.021 €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 E-0.007 -0.006 0.005 0.004 0.003 €0.002 0.001 0.00 10 0.75 0.80 0.85 Humid Volume, m³/kg Dry Air Below 0°C Properties and Enthalpy Deviation Lines Are For Ice 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.) 55 Moisture Content, kg/kg Dry Air
Follow the standard energy balance steps to determine the water condensed and the heat removed
from a humid air stream. The feed stream contains 12 wt% water (balance is air), has a
temperature of 250°C and a pressure of 1 atm. The exit gas stream is at 1 atm and 25°C. The
exit vapor composition should be determined from the psychrometric chart (saturated). The heat
of vaporization of water at 25°C is 44.0 kJ/mol.
Draw a picture and label appropriately (Basis: 1 kg/s feed).
a.
b. Perform a degree of freedom analysis.
c. Write appropriate equations.
d. Complete all material balances.
e. Specify reference states.
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 12 wt% water (balance is air), has a temperature of 250°C and a pressure of 1 atm. The exit gas stream is at 1 atm and 25°C. The exit vapor composition should be determined from the psychrometric chart (saturated). The heat of vaporization of water at 25°C is 44.0 kJ/mol. Draw a picture and label appropriately (Basis: 1 kg/s feed). a. b. Perform a degree of freedom analysis. c. Write appropriate equations. d. Complete all material balances. e. Specify reference states.
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