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Focus on Example 8.4-5.  Show all of the plotting for the relative humidty and dry-bulb temperature.   Use any linear interpolation for the enthalpy deviation.

Focus on Example 8.4-5.  Show all of the plotting for the relative humidty and dry-bulb temperature.   Use any linear interpolation for the enthalpy deviation.

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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Focus on Example 8.4-5.  Show all of the plotting for the relative humidty and dry-bulb temperature.   Use any linear interpolation for the enthalpy deviation. 

||! PDF Elementary Principles of Chemica X PDF *Elementary Principles of Chemic X + ℗ File 57°F Sunny Draw E:/Elementary%20Principles%20of%20Chemical%20Processes,%204th%20Edition%20(%20PDFDrive%20).pdf тль T T Read aloud Calculation Example 8.4-5 456 of 695 the constant wet-bulb temperature line to the enthalpy scale above the saturation curve, read the value on that scale,nd add the enthalpy deviation to it. For example air at 35°C and 10% relative humidity has an enthalpy deviation of about 0.52 kJ/kg DA The specite enthalpy of saturated air at the same wet-bulb temperature 145.0 kJ/kg DA. Verify both of these numbers.) The perife enthalpy of the humid air at the given condition is therefore (45.0-0.52) kJ/kg DA = 44.5¹kJ/kg DA. The basis for the construction/ of the psychrometric chart is the Gibbs phase rule (Section 63a) which states that specifying a certain number of the intensive variables (tempera- ture pressure, specific volume, specific enthalpy, component mass or mole fractions, etc.) of a system automatically fixes the value of the remaining intensive variables. Humid air contains one phase and two components," so that from Equation 6.2-1 the number of degrees of freedom is F=2+2 -1 =3 Specifying three intensive variables therefore fixes all other system properties. If the system pressure is fixed at 1 atm, then all other properties may be plotted on a two-dimensional plot, such as those shown in Figures 8.4-1 and 8.4 2. 11 The Psychrometric Chart Use the psychrometric chart to estimate (1) the absolute humidity, wet-bulb temperature, humid volume, dew point, and specific enthalpy of humid air at 41°C and 10% relative humidity, and (2) the amount of water in 150 m³ of air at these conditions. Since the components of dry air do not condense and are present in fixed proportion, dry air may be considered a single species (designated DA) in humidity calculations. Q Search ■ {" D 33 ENG Sign in 00 : 7:15 AM 5/28/2023
Transcribed Image Text:||! PDF Elementary Principles of Chemica X PDF *Elementary Principles of Chemic X + ℗ File 57°F Sunny Draw E:/Elementary%20Principles%20of%20Chemical%20Processes,%204th%20Edition%20(%20PDFDrive%20).pdf тль T T Read aloud Calculation Example 8.4-5 456 of 695 the constant wet-bulb temperature line to the enthalpy scale above the saturation curve, read the value on that scale,nd add the enthalpy deviation to it. For example air at 35°C and 10% relative humidity has an enthalpy deviation of about 0.52 kJ/kg DA The specite enthalpy of saturated air at the same wet-bulb temperature 145.0 kJ/kg DA. Verify both of these numbers.) The perife enthalpy of the humid air at the given condition is therefore (45.0-0.52) kJ/kg DA = 44.5¹kJ/kg DA. The basis for the construction/ of the psychrometric chart is the Gibbs phase rule (Section 63a) which states that specifying a certain number of the intensive variables (tempera- ture pressure, specific volume, specific enthalpy, component mass or mole fractions, etc.) of a system automatically fixes the value of the remaining intensive variables. Humid air contains one phase and two components," so that from Equation 6.2-1 the number of degrees of freedom is F=2+2 -1 =3 Specifying three intensive variables therefore fixes all other system properties. If the system pressure is fixed at 1 atm, then all other properties may be plotted on a two-dimensional plot, such as those shown in Figures 8.4-1 and 8.4 2. 11 The Psychrometric Chart Use the psychrometric chart to estimate (1) the absolute humidity, wet-bulb temperature, humid volume, dew point, and specific enthalpy of humid air at 41°C and 10% relative humidity, and (2) the amount of water in 150 m³ of air at these conditions. Since the components of dry air do not condense and are present in fixed proportion, dry air may be considered a single species (designated DA) in humidity calculations. Q Search ■ {" D 33 ENG Sign in 00 : 7:15 AM 5/28/2023
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