15_07_86 - 58 60 63 65 67 7.4 57 60 62 64 66 7.6 56 59 61...

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DETERMINATION OF RELATIVE HUMIDITY FROM DEW POINT The relative humidity of a water vapor-air mixture is defined as 100 times the partial pressure of water divided by the satura- tion vapor pressure of water at the same temperature. The rela- tive humidity may be determined from the dew point t dew , which is the temperature at which liquid water first condenses when the mixture is cooled from an initial temperature t . This table gives relative humidity as a function of the dew point depression t t dew for several values of the dew point. Values are calculated from the vapor pressure table in Section 6. t dew /°C t t dew –10 0 10 20 30 0.0 100 100 100 100 100 0.2 99 99 99 99 99 0.4 97 97 97 98 98 0.6 95 96 96 96 97 0.9 94 94 95 95 96 1.0 92 93 94 94 94 1.2 91 92 92 93 93 1.4 90 90 91 92 92 1.6 88 89 90 91 91 1.8 87 88 89 90 90 2.0 86 87 88 88 89 2.2 84 85 86 87 89 2.4 83 84 85 86 87 2.6 82 83 84 85 86 2.8 80 82 83 84 85 3.0 79 81 82 83 84 3.2 78 80 81 82 83 3.4 77 79 80 81 82 3.6 76 77 79 80 82 3.8 75 76 78 79 81 4.0 73 75 77 78 80 4.2 72 74 76 77 79 4.4 71 73 75 77 78 4.6 70 72 74 76 77 4.8 69 71 73 75 76 5.0 69 70 72 74 75 5.2 67 69 71 73 75 5.4 66 68 70 72 74 5.6 65 67 69 71 73 5.9 64 66 69 70 72 6.0 63 66 68 70 71 6.2 62 65 67 69 71 6.4 61 64 66 68 70 6.6 60 63 65 67 69 6.8 60 62 64 66 68 7.0 59 61 63 66 68 7.2
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Unformatted text preview: 58 60 63 65 67 7.4 57 60 62 64 66 7.6 56 59 61 63 65 7.8 55 58 60 63 65 8.0 54 57 60 62 64 t dew /C t t dew 10 10 20 30 8.2 54 56 59 61 63 8.4 53 56 58 60 63 8.6 52 55 57 60 62 8.8 51 54 57 59 61 9.0 51 53 56 58 61 9.2 50 53 55 58 60 9.4 49 52 55 57 59 9.6 48 51 54 56 59 9.8 48 51 53 56 58 10.0 47 50 53 55 57 10.5 45 48 51 54 56 11.0 44 47 49 52 55 11.5 42 45 48 51 53 12.0 41 44 47 49 52 12.5 39 42 45 48 50 13.0 38 41 44 46 49 13.5 37 40 43 45 48 14.0 35 38 41 44 47 14.5 34 37 40 43 45 15.0 33 36 39 42 44 15.5 32 35 38 40 16.0 31 34 37 39 16.5 30 33 36 38 17.0 29 32 35 37 17.5 28 31 34 36 18.0 27 30 33 35 18.5 26 29 32 34 19.0 25 28 31 33 19.5 24 27 30 33 20.0 24 26 29 32 21.0 22 25 27 30 22.0 21 23 26 29 23.0 19 22 24 27 24.0 18 21 23 26 25.0 17 19 22 24 26.0 16 18 21 23 27.0 15 17 20 22 28.0 14 16 19 21 29.0 13 15 18 20 30.0 12 14 17 19 15-31...
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