1. An air-water vapor sample has a dry bulb temperature of 60 oC and an absolute humidity 0.015 kg water /kg dry air at 1 std atm pressure. Calculate : percentage humidity, molal absolute humidity, partial pressure of water vapor
1. An air-water vapor sample has a dry bulb temperature of 60 oC and an absolute humidity 0.015 kg water /kg dry air at 1 std atm pressure. Calculate : percentage humidity, molal absolute humidity, partial pressure of water vapor
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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1. An air-water vapor sample has a dry bulb temperature of 60 oC and an absolute humidity 0.015 kg water /kg dry air at 1 std atm pressure.
Calculate : percentage humidity, molal absolute humidity, partial pressure of water vapor, relative humidity, dew point, humid volume, humid heat, enthalpy.
If this air is contacted with water at adiabatic saturation temperature and is thereby humidified and cooled to (i) 100% saturation (ii) 80% saturation, what are the final temperature and humidity of the air?
Transcribed Image Text:1. An air-water vapor sample has a dry bulb
temperature of 60 °C and an absolute humidity
0.015 kg water /kg dry air at 1 std atm pressure.
Calculate : percentage humidity, molal absolute
humidity, partial pressure of water vapor, relative
humidity, dew point, humid volume, humid heat,
enthalpy.
If this air is contacted with water at adiabatic
saturation temperature and is thereby humidified
and cooled to (i) 100% saturation (ii) 80% saturation,
what are the final temperature and humidity of the
air?
Transcribed Image Text:2. Water is to be cooled from 43.3 °C to 26.7 °C in a forced draft cooling tower under conditions such that the height of the
transfer unit is 0.53 metre. Air enter the bottom of the tower at 23.9 °C and a wet bulb temperature of 21.1 °c. Find the
tower height if 1.33 times the minimum air is used. Neglect the heat transfer resistance of liquid phase.
The enthalpy data is given as under :
Temperature 15.6
18.3
21.1
23.9
26.7
29.4
32.2
35
37.8
40.6
43.3
of air, °C
Enthalpy of
14.7
16.7
18.9
21.5
24.3
27.5
31.1
35.2
39.9
45.2 51.3
moist air,
kcal/kg dry
air
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