What happens when relative humidity (RH) = 100%? a)if the air is continued to be cooled, at what temperature will the saturation point be reached? b)What happens if the air is continued to be cooled below the DBT you just found?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.23P: Using the information in Problem 1.22, estimate the ambient air temperature that could cause...
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What happens when relative humidity (RH) = 100%?

a)if the air is continued to be cooled, at what temperature will the saturation point be reached?

b)What happens if the air is continued to be cooled below the DBT you just found?

(psychrometric chart image)

210
S0
|200
– 13
|190
85
85–
– 1.2
180
65
85 WET BULB TEMPERATURE - °F:
170
E 11
160
80
80–
150
140 a
75
75-
130 A
70
110 2
70–
100
70
65–
60
60-
55-
50
55 8
50-
45
45-
40
40-
S40%
36
35 2
30
25
20%
15
20=
1
10
10
10% RELATIVE HUMIDITY
10-=
5
-20–
10
15
20
60
65
70
85
95
100
110
115
120
DRY BULB TEMPERATURE - °F
Linric Company Psychrometric Chart, www.linric.com
70
る
ENTHALPY - BTU PER POUND OF DRY AIR
VAPOR PRESSURE - INCHES OF MERCURY
3.
으。
15.5
HUMIDITY RATIO - GRAINS OF MOISTURE PER POUND OF DRY AIR
80
DEW POINT - °F
20
15.0
25%-
15%
14.5:
14.0 SPECIFIC VOLUME fAb OF DRY AIR-
13.5
%08
%06-
25
ENTHALPY - BTU PER POUND OF DRY AIR
%0%
%0%9
50%
SATURATION TEMPERATURE - °F
50
13.0
45
35
12.5
30
20
42.0
LO
Transcribed Image Text:210 S0 |200 – 13 |190 85 85– – 1.2 180 65 85 WET BULB TEMPERATURE - °F: 170 E 11 160 80 80– 150 140 a 75 75- 130 A 70 110 2 70– 100 70 65– 60 60- 55- 50 55 8 50- 45 45- 40 40- S40% 36 35 2 30 25 20% 15 20= 1 10 10 10% RELATIVE HUMIDITY 10-= 5 -20– 10 15 20 60 65 70 85 95 100 110 115 120 DRY BULB TEMPERATURE - °F Linric Company Psychrometric Chart, www.linric.com 70 る ENTHALPY - BTU PER POUND OF DRY AIR VAPOR PRESSURE - INCHES OF MERCURY 3. 으。 15.5 HUMIDITY RATIO - GRAINS OF MOISTURE PER POUND OF DRY AIR 80 DEW POINT - °F 20 15.0 25%- 15% 14.5: 14.0 SPECIFIC VOLUME fAb OF DRY AIR- 13.5 %08 %06- 25 ENTHALPY - BTU PER POUND OF DRY AIR %0% %0%9 50% SATURATION TEMPERATURE - °F 50 13.0 45 35 12.5 30 20 42.0 LO
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