Weather Data - Hours available for evaporative cooling:


 Location:  Atlanta, GA      Elev: 1010    Lat: 33/39N  Long:84/26W

Mean Frequency of occurrence of Dry Bulb Temperature with Mean Coincident Wet Bulb Temperature for each Dry Bulb Temperature Range:

                               ASHRAE  design Dry Bulb and Mean Coincident Wet Bulb:
                          
   1% Scale:    2.5% Scale:    5% Scale:            Design Wet Bulb:
                           Db       Wb       Db      Wb        Db      Wb           1%     2.5%     5%
                           96        77         94       77         92        77           80        79         79
  
Average number of hours within each temperature range and discharge temp. (see notes):

January - April Weather Data

Temp Range: Deg (f) January February March April Total
Low High Mean Hours Wb Tout Hours Wb Tout Hours Wb Tout Hours Wb Tout  
115 120 117.5                          
110 114 112                          
105 109 107                          
100 104 102                          
95 99 97                          
90 94 92                          
85 89 87                   2 66 67.1 2.0
80 84 82             1 64 64.9 24 64 64.9 25.0
75 79 77       2 63 63.7 13 62 62.8 58 62 62.8 73.0
70 74 72 5 63 63.5 11 60 60.6 27 59 59.7 79 61 61.6 122.0
65 69 67 18 61 61.3 28 57 57.8 56 57 57.5 113 59 59.4 215.0
60 64 62 47 57 57.3 52 55 55.4 84 54 54.4 143 56 56.3 326.0
55 59 57 69 52 52.3 82 51 51.3 117 50 50.4 121 52 52.3 389.0
50 54 52 89 47 47.3 97 47 47.3 122 47 47.3 81 46 46.3 389.0
45 49 47 106 43 43.2 106 42 42.3 115 42 42.3 54 42 42.3 583.0
40 44 42 117 38 38.2 108 38 38.2 99 38 38.2 31 38 38.2 355.0
35 39 37 123 34 34.2 87 34 34.2 61 33 33.2 11 34 34.2 282.0
30 34 32 91 30 30.1 53 29 29.2 37 29 29.2 2 29 29.2 183.0
Total hours Temp out over 40(f) 334   378   535   675 Total hours for this period 2273.0

Note: 1.  Db = Dry Bulb(f) temperature, Wb = Mean coincident wet bulb temp (f).  Tout = Discharge Temperature (f).   Only hours where discharge temp is over 400(f) is included in total hours available for evaporative cooling.

May - August Weather Data

Temp Range: Deg (f) May June July August Total
Low High Mean Hours Wb Tout Hours Wb Tout Hours Wb Tout Hours Wb Tout  
115 120 117.5                          
110 114 112                          
105 109 107                          
100 104 102             1 72 73.5 7 74 76.2 8.0
95 99 97       5 74 75.2 6 74 75.2 39 74 75.9 50.0
90 94 92 5 70 71.1 39 74 74.9 40 74 74.9 105 73 74.7 189.0
85 89 87 46 69 69.9 77 72 72.8 91 74 74.7 137 72 73.5 351.0
80 84 82 81 67 67.8 114 71 71.6 143 73 73.5 165 71 72.3 503.0
75 79 77 106 66 66.6 143 69 69.4 171 72 72.3 211 69 70.2 631.0
70 74 72 141 64 64.4 185 68 68.2 234 70 70.1 68 65 66.1 628.0
65 69 67 176 62 62.5 121 64 64.4 55 66 66.1 11 60 60.1 363.0
60 64 62 100 58 58.2 28 59 59.2 6 60 60.1       134.0
55 59 57 52 53 53.2 7 55 55.1             59.0
50 54 52 25 48 48.2 1 49 49.2             26.0
45 49 47 9 44 44.2                   9.0
40 44 42 3 40 40.1                   3.0
35 39 37                          
30 34 32                          
Total hours Temp out over 40(f) 744   720   747   743 Total hours for this period 2951.0

September - December Weather Data

Temp Range: Deg (f) September October November December Total
Low High Mean Hours Wb Tout Hours Wb Tout Hours Wb Tout Hours Wb Tout  
115 120 117.5                          
110 114 112                          
105 109 107                          
100 104 102 2 72 73.5                   2.0
95 99 97 11 71 72.3 1 73 74.2             12.0
90 94 92 42 71 72.1 4 70 71.1             46.0
85 89 87 91 70 70.9 20 68 69.0             111.0
80 84 82 118 68 68.7 57 64 64.9 1 67 67.8       176.0
75 79 77 186 67 67.5 94 63 63.7 6 64 64.7 3 68 68.5 289.0
70 74 72 143 63 63.5 135 60 60.6 25 60 60.6 19 66 66.3 322.0
65 69 67 86 59 59.4 149 57 57.5 54 59 59.4 47 63 63.2 336.0
60 64 62 30 54 54.4 123 52 52.5 92 56 56.3 61 58 58.2 306.0
55 59 57 8 49 49.4 87 48 48.5 111 51 51.3 86 53 53.2 292.0
50 54 52 1 45 45.4 43 43 43.5 113 47 47.3 114 48 48.2 271.0
45 49 47       20 39 39.4 117 42 42.3 136 44 44.2 273.0
40 44 42       8 33 33.5 94 38 38.2 121 39 39.2 223.0
35 39 37             60 33 33.2 87 35 35.1 147.0
30 34 32             31 29 29.2 19 30 30.1 50.0
Total hours Temp out over 40(f) 718   713   519   466 Total hours for this period 2436.0
Total hours available for evaporative cooling 7660

Data published by Premier Industries, Inc., in part from data contained in EcoDyne's Weather Data Handbook no longer in print.  Premier Industries, Inc., provides these data for informational use only.  All reasonable precautions have been taken to maintain integrity in these data however  Premier Industries will not be responsible for it's accuracy.  Any responsibility for the use of this information shall be borne by the user.