An air stream, initially at 41°C and with a relative humidity of 50%, enters an air conditioning unit at 4 m3 /s. The air conditioning unit cools the air stream, condensing out a proportion of the water vapour present, to produce a cool air stream saturated with water vapour. The whole process takes place at 1 atm pressure. Using the psychrometric chart supplied: a) Find the dew point, wet bulb temperature and humidity of the air before it enters the air conditioning unit.   b) Find the temperature to which the air must be cooled to condense out 5.1 kg/min water.    c) Find the partial pressure of water in the initial air stream, and the vapour pressure of water at 41°C. Charts and tables are not needed to answer this part of the question.

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
icon
Related questions
Question

An air stream, initially at 41°C and with a relative humidity of 50%, enters an air conditioning unit at 4 m3 /s. The air conditioning unit cools the air stream, condensing out a proportion of the water vapour present, to produce a cool air stream saturated with water vapour. The whole process takes place at 1 atm pressure. Using the psychrometric chart supplied:

a) Find the dew point, wet bulb temperature and humidity of the air before it enters the air conditioning unit.  

b) Find the temperature to which the air must be cooled to condense out 5.1 kg/min water.   

c) Find the partial pressure of water in the initial air stream, and the vapour pressure of water at 41°C. Charts and tables are not needed to answer this part of the question.  

0.030
0.028
0.026
30°C
0.024
90KJ/kg.
0.022
Psychrometric Chart
80KJ/kg
Barometric Pressure 101.325 kPa
Basis - per kg of dry air
0,020
0.018
70kJkg
0.016
0.014
60kJkg
Wet Bulb 20°C
Enthalpy 50kJkg_
0.012
0.010
0.008
40KJ/kg.
0.006
30kJkg
0.004
10°G
0.002
20kJ/kg_
0.000
10KJ/kg
O°C
50
40
OkJkg
30
20
10
Dry Bulb Temperature (°C)
-10
0.95m kg
Specific Humidity - Moisture Content (kg/kg)
RH 0-5
f0.90m³lkg
70.85m³/kg
0.80m³/k
0.75m³/kg
Transcribed Image Text:0.030 0.028 0.026 30°C 0.024 90KJ/kg. 0.022 Psychrometric Chart 80KJ/kg Barometric Pressure 101.325 kPa Basis - per kg of dry air 0,020 0.018 70kJkg 0.016 0.014 60kJkg Wet Bulb 20°C Enthalpy 50kJkg_ 0.012 0.010 0.008 40KJ/kg. 0.006 30kJkg 0.004 10°G 0.002 20kJ/kg_ 0.000 10KJ/kg O°C 50 40 OkJkg 30 20 10 Dry Bulb Temperature (°C) -10 0.95m kg Specific Humidity - Moisture Content (kg/kg) RH 0-5 f0.90m³lkg 70.85m³/kg 0.80m³/k 0.75m³/kg
Expert Solution
steps

Step by step

Solved in 2 steps with 5 images

Blurred answer
Knowledge Booster
Reactive Processes
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemical-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The