Weather Data - Hours available for evaporative cooling:


 Location:  Las Vegas, NV/ Nellis AFB   Elev: 1868 Feet     Lat:  36 /15 N Long: 115/ 02 W

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%
108        66        106      65        104        65       66        65       64

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 Hours
115 120 117.5                          
110 114 112                          
105 109 107                          
100 104 102                          
95 99 97                   1 60 61.9 1
90 94 92                   12 58 59.7 12
85 89 87             2 56 57.6 26 56 57.6 28
80 84 82       1 56 57.3 12 54 55.4 49 54 55.4 62
75 79 77 1 56 57.1 8 54 55.2 31 52 53.3 74 52 53.3 114
70 74 72 4 52 53 21 51 52.1 57 50 51.1 90 50 51.1 172
65 69 67 17 49 49.9 40 49 50.2 80 84 83.2 102 47 48 239
60 64 62 49 46 46.8 73 46 46.8 103 45 45.9 107 45 45.9 332
55 59 57 75 44 44.7 107 44 44.7 122 43 43.7 104 43 43.7 408
50 54 52 107 41 41.6 122 41 41.6 123 40 40.6 84 41 41.6 436
45 49 47 122 38 38.5 116 38 38.5 102 37 37.5 52 38 38.5 292
40 44 42 114 34 34.4 90 35 35.4 68 34 34.4 18 35 35.4 290
35 39 37 104 31 31.3 60 31 31.3 29 30 30.4 3 31 31.3 196
30 34 32 83 27 27.3 27 27 27.3 10 26 26.3       120
Total hours Temp out over 40(f) 253   372   530   649 Total hours for this period 1804

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.
Note 2.  Tout (Discharge temp) based on using Glacier-Cor(tm) Super Saturation cooling media, 12" thick @ 500FPM velocity and 95% Saturation Efficiency.

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 Hours
115 120 117.5                          
110 114 112       8 67 69.3 17 68 70.2 6 70 72.1 31
105 109 107       28 66 68.1 63 68 70 40 69 70.9 131
100 104 102 8 63 65 64 64 65.9 118 66 67.8 96 58 69.7 286
95 99 97 30 61 62.8 79 62 63.6 120 65 66.6 115 67 68.5 344
90 94 92 63 59 60.7 92 60 61.6 118 64 65.4 121 66 67.3 394
85 89 87 84 57 58.5 101 58 59.5 113 62 63.3 127 64 65.2 425
80 84 82 91 55 56.4 106 56 57.3 95 60 61.1 117 63 64 409
75 79 77 100 53 54.2 90 54 55.2 60 57 58 72 60 60.9 322
70 74 72 103 51 52.1 75 52 53 30 53 54 34 56 56.8 242
65 69 67 100 49 50.2 46 50 51.1 10 48 49 13 52 52.8 169
60 64 62 82 47 47.8 22 48 48.7 2 44 44.9 2 46 46.8 108
55 59 57 53 45 45.6 7 46 46.6       1 44 44.7 61
50 54 52 22 42 42.5 1 44 44.4             23
45 49 47 4 39 39.4                   4
40 44 42 1 38 38.2                   1
35 39 37                          
30 34 32                          
Total hours Temp out over 40(f) 736   719   746   744 Total hours for this period 2945

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 Hours
115 120 117.5                          
110 114 112                          
105 109 107 4 67 69                   4
100 104 102 29 65 66.9                   29
95 99 97 57 64 65.7 4 62 63.8             61
90 94 92 80 62 63.5 22 60 61.6             102
85 89 87 96 61 62.3 44 58 59.5             140
80 84 82 97 59 60.2 65 56 57.3 3 55 56.4       165
75 79 77 106 57 58 79 54 55.2 17 53 54.2       202
70 74 72 102 54 54.9 90 52 53 36 51 52.1 3 49 50.2 231
65 69 67 80 51 51.8 109 50 50.9 66 49 49.9 15 48 49 270
60 64 62 43 47 47.8 114 48 48.7 85 47 47.8 42 47 47.8 284
55 59 57 18 43 43.7 103 45 45.6 116 45 45.6 75 44 44.7 312
50 54 52 4 39 39.7 67 42 42.5 131 42 42.5 104 42 42.5 302
45 49 47 1 36 36.6 32 38 38.5 115 39 39.4 125 38 38.5  
40 44 42       11 34 34.4 81 35 35.4 131 35 35.4  
35 39 37             45 32 32.5 116 31 31.3  
30 34 32             18 27 27.3 95 28 28.2  
Total hours Temp out over 40(f) 712   697   454   239 Total hours for this period 2102

Total hours available for evaporative cooling per year

6851

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.