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RELATIVE HUMIDITY IN THE HOME During the winter, the relative humidity inside a home can drop to an extremely low value and the inhabitants are usually unaware of it. When cold polar air is brought indoors and heated, its relative humidity decreases dramatically. Notice in • Fig 4.20 that when outside air with a temperature and dew point of – 15°C (5°F) is brought indoors and heated to 20°C (68°F), the relative humidity of the heated air drops to 8 percent-a value lower than what you would normally experience in a desert during the hottest time of the day.*

RELATIVE HUMIDITY IN THE HOME During the winter, the relative humidity inside a home can drop to an extremely low value and the inhabitants are usually unaware of it. When cold polar air is brought indoors and heated, its relative humidity decreases dramatically. Notice in • Fig 4.20 that when outside air with a temperature and dew point of – 15°C (5°F) is brought indoors and heated to 20°C (68°F), the relative humidity of the heated air drops to 8 percent-a value lower than what you would normally experience in a desert during the hottest time of the day.*

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Please explain how did it become 8 percent explain the calculation

TABLE 1 Saturation Vapor Pressure Over Water for Various Air Temperatures* SATURATION SATURATION VAPOR AIR VAPOR PRESSURE AIR TEMPERATURE PRESSURE TEMPERATURE (°C) (°F) (MB) (°C) (°F) (MB) -18 (0) 1.5 18 (65) 21.0 -15 (5) 1.9 21 (70) 25.0 -12 (10) 2.4 24 (75) 29.6 -9 (15) 3.0 27 (80) 35.0 -7 (20) 3.7 29 (85) 41.0 -4 (25) 4.6 32 (90) 48.1 -1 (30) 5.6 35 (95) 56.2 2 (35) 6.9 38 (100) 65.6 4 (40) 8.4 41 (105) 76.2 7 (45) 10.2 43 (110) 87.8 10 (50) 12.3 46 (115) 101.4 13 (55) 14.8 49 (120) 116.8 16 (60) 17.7 52 (125) 134.2 *The data in this table can be obtained in Fig. 4.10, p. 97, by reading where the air temperature inter- sects the saturation vapor pressure curve.
Transcribed Image Text:TABLE 1 Saturation Vapor Pressure Over Water for Various Air Temperatures* SATURATION SATURATION VAPOR AIR VAPOR PRESSURE AIR TEMPERATURE PRESSURE TEMPERATURE (°C) (°F) (MB) (°C) (°F) (MB) -18 (0) 1.5 18 (65) 21.0 -15 (5) 1.9 21 (70) 25.0 -12 (10) 2.4 24 (75) 29.6 -9 (15) 3.0 27 (80) 35.0 -7 (20) 3.7 29 (85) 41.0 -4 (25) 4.6 32 (90) 48.1 -1 (30) 5.6 35 (95) 56.2 2 (35) 6.9 38 (100) 65.6 4 (40) 8.4 41 (105) 76.2 7 (45) 10.2 43 (110) 87.8 10 (50) 12.3 46 (115) 101.4 13 (55) 14.8 49 (120) 116.8 16 (60) 17.7 52 (125) 134.2 *The data in this table can be obtained in Fig. 4.10, p. 97, by reading where the air temperature inter- sects the saturation vapor pressure curve.
RELATIVE HUMIDITY IN THE HOME During the winter, the relative humidity inside a home can drop to an extremely low value and the inhabitants are usually unaware of it. When cold polar air is brought indoors and heated, its relative humidity decreases dramatically. Notice in • Fig 4.20 that when outside air with a temperature and dew point of – 15°C (5°F) is brought indoors and heated to 20°C (68°F), the relative humidity of the heated air drops to 8 percent-a value lower than what you would normally experience in a desert during the hottest time of the day.* 1.9 mb * RH X 100 = 8% 23.4 mb
Transcribed Image Text:RELATIVE HUMIDITY IN THE HOME During the winter, the relative humidity inside a home can drop to an extremely low value and the inhabitants are usually unaware of it. When cold polar air is brought indoors and heated, its relative humidity decreases dramatically. Notice in • Fig 4.20 that when outside air with a temperature and dew point of – 15°C (5°F) is brought indoors and heated to 20°C (68°F), the relative humidity of the heated air drops to 8 percent-a value lower than what you would normally experience in a desert during the hottest time of the day.* 1.9 mb * RH X 100 = 8% 23.4 mb
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