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ATEC/Indirex |
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Water Evaporation Rate / Air Stream Moisture Addition |
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Evaporative Cooling and More… |
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HaveACoolDay.com |
Ph: 303.816.7075 |
Fx: 303.838.9651 |
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©ATEC/Indirex |
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Update: |
4-Nov-09 |
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All calculations based on sea level |
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Design Conditions |
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Dry Bulb Temperature |
110 |
110 |
105 |
105 |
100 |
100 |
100 |
95 |
95 |
95 |
90 |
90 |
85 |
85 |
80 |
80 |
80 |
75 |
75 |
70 |
70 |
oF |
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Wet Bulb Temperature |
75 |
70 |
75 |
70 |
75 |
70 |
65 |
70 |
65 |
60 |
65 |
60 |
65 |
60 |
65 |
60 |
55 |
60 |
55 |
60 |
55 |
oF |
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Ralative Humidity |
19.5% |
12.5% |
25.0% |
16.5% |
31.5% |
22.0% |
13.0% |
28.5% |
18.0% |
9.0% |
25.0% |
14.5% |
34.0% |
21.0% |
45.0% |
30.0% |
16.5% |
41.0% |
25.0% |
56.0% |
38.0% |
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Humidity Ratio |
0.0106 |
0.0066 |
0.0118 |
0.0077 |
0.0130 |
0.0089 |
0.0052 |
0.0100 |
0.0064 |
0.0031 |
0.0075 |
0.0043 |
0.0087 |
0.0054 |
0.0098 |
0.0065 |
0.0036 |
0.0077 |
0.0047 |
0.0088 |
0.0058 |
LBm/LBd |
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Specific Volume |
14.60 |
14.50 |
14.50 |
14.40 |
14.40 |
14.30 |
14.20 |
14.20 |
14.15 |
14.05 |
14.00 |
13.90 |
13.90 |
13.80 |
13.60 |
13.75 |
13.70 |
13.65 |
13.60 |
13.55 |
13.45 |
Ft3/LBd |
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6" Depth Evap Media |
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6" Effectiveness |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
72% |
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Supply Air Temperature |
84.8 |
81.2 |
83.4 |
79.8 |
82.0 |
78.4 |
74.8 |
77.0 |
73.4 |
69.8 |
72.0 |
68.4 |
70.6 |
67.0 |
69.2 |
65.6 |
62.0 |
64.2 |
60.6 |
62.8 |
59.2 |
oF |
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Supply Rel. Humidity |
63.0% |
58.0% |
68.0% |
62.0% |
73.0% |
66.0% |
59.0% |
71.0% |
64.0% |
57.0% |
69.0% |
62.0% |
74.0% |
67.0% |
80.0% |
72.5% |
65.0% |
79.0% |
70.0% |
86.0% |
78.0% |
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Supply Humid Ratio |
0.0165 |
0.0142 |
0.0168 |
0.0135 |
0.0172 |
0.0138 |
0.0110 |
0.0142 |
0.0114 |
0.0089 |
0.0116 |
0.0092 |
0.0120 |
0.0095 |
0.0122 |
0.0098 |
0.0076 |
0.0101 |
0.0080 |
0.0105 |
0.0083 |
LBm/LBd |
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Specific Volume |
14.10 |
13.90 |
14.05 |
13.90 |
14.05 |
13.85 |
13.70 |
13.80 |
13.70 |
13.55 |
13.65 |
13.50 |
13.60 |
13.50 |
13.60 |
13.45 |
13.30 |
13.40 |
13.25 |
13.40 |
13.25 |
Ft3/LBd |
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Air Volume (cfm) |
Water Evaporation Rate - Air Stream Moisture Addition (gph) per 1,000
cfm |
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1,000 |
3.0 |
3.9 |
2.5 |
3.0 |
2.1 |
2.5 |
3.0 |
2.2 |
2.6 |
3.0 |
2.1 |
2.6 |
1.7 |
2.2 |
1.3 |
1.7 |
2.1 |
1.3 |
1.8 |
0.9 |
1.3 |
gal/hr |
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8" Depth Evap Media |
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8" Effectiveness |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
80% |
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Supply Air Temperature |
82.0 |
78.0 |
81.0 |
77.0 |
80.0 |
76.0 |
72.0 |
75.0 |
71.0 |
67.0 |
70.0 |
66.0 |
69.0 |
65.0 |
68.0 |
64.0 |
60.0 |
63.0 |
59.0 |
62.0 |
58.0 |
oF |
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Supply Rel. Humidity |
73% |
68% |
76% |
71% |
80% |
75% |
70% |
78% |
73% |
68% |
77% |
71% |
81% |
75% |
85% |
80% |
73% |
85% |
78% |
90% |
83% |
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Supply Humid Ratio |
0.0172 |
0.0140 |
0.0174 |
0.0142 |
0.0176 |
0.0144 |
0.0116 |
0.0147 |
0.0119 |
0.0095 |
0.0121 |
0.0097 |
0.0123 |
0.0100 |
0.0126 |
0.0102 |
0.0081 |
0.0104 |
0.0084 |
0.0107 |
0.0086 |
LBm/LBd |
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Specific Volume |
14.05 |
13.85 |
14.00 |
13.80 |
14.00 |
13.80 |
13.65 |
13.80 |
13.65 |
13.50 |
13.60 |
13.45 |
13.55 |
13.45 |
13.55 |
13.40 |
13.25 |
13.40 |
13.25 |
13.35 |
13.25 |
Ft3/LBd |
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Air Volume (cfm) |
Water Evaporation Rate - Air Stream Moisture Addition (gph) per 1,000
cfm |
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1,000 |
3.32 |
3.76 |
2.83 |
3.32 |
2.33 |
2.82 |
3.31 |
2.42 |
2.85 |
3.35 |
2.40 |
2.84 |
1.89 |
2.43 |
1.49 |
1.96 |
2.41 |
1.44 |
1.99 |
1.02 |
1.51 |
gal/hr |
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12" Depth Evap Media |
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12" Effectiveness |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
90% |
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Supply Air Temperature |
78.5 |
74.0 |
78.0 |
73.5 |
77.5 |
73.0 |
68.5 |
72.5 |
68.0 |
63.5 |
67.5 |
63.0 |
67.0 |
62.5 |
66.5 |
62.0 |
57.5 |
61.5 |
57.0 |
61.0 |
56.5 |
oF |
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Supply Rel. Humidity |
85.0% |
82.0% |
87.0% |
85.0% |
90.0% |
87.0% |
83.0% |
89.0% |
85.0% |
82.5% |
87.0% |
85.0% |
90.0% |
87.5% |
92.0% |
90.0% |
86.0% |
92.0% |
89.0% |
95.0% |
91.0% |
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Supply Humid Ratio |
0.0180 |
0.0149 |
0.0182 |
0.0150 |
0.0182 |
0.0152 |
0.0124 |
0.0153 |
0.0126 |
0.0103 |
0.0127 |
0.0104 |
0.0128 |
0.0106 |
0.0129 |
0.0107 |
0.0087 |
0.0108 |
0.0088 |
0.0109 |
0.0089 |
LBm/LBd |
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Specific Volume |
13.95 |
13.75 |
13.90 |
13.75 |
13.90 |
13.75 |
13.60 |
13.75 |
13.60 |
13.40 |
13.55 |
13.40 |
13.55 |
13.40 |
13.55 |
13.35 |
13.25 |
13.35 |
13.20 |
13.35 |
13.20 |
Ft3/LBd |
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Air Volume (cfm) |
Water Evaporation Rate - Air Stream Moisture Addition (gph) per 1,000
cfm |
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1,000 |
3.7 |
4.2 |
3.2 |
3.7 |
2.6 |
3.2 |
3.7 |
2.7 |
3.2 |
3.8 |
2.7 |
3.2 |
2.2 |
2.8 |
1.6 |
2.2 |
2.7 |
1.7 |
2.2 |
1.1 |
1.7 |
gal/hr |
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18" Depth Evap Media |
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18" Effectiveness |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
98% |
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Supply Air Temperature |
75.7 |
70.8 |
75.6 |
70.7 |
75.5 |
70.6 |
65.7 |
70.5 |
65.6 |
60.7 |
65.5 |
60.6 |
65.4 |
60.5 |
65.3 |
60.4 |
55.5 |
60.3 |
55.4 |
60.2 |
55.3 |
oF |
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Supply Rel. Humidity |
96.0% |
96.0% |
96.5% |
96.5% |
97.0% |
97.0% |
97.0% |
97.0% |
97.0% |
96.5% |
97.0% |
97.0% |
97.5% |
97.0% |
98.0% |
97.5% |
97.0% |
98.0% |
97.5% |
98.5% |
97.5% |
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Supply Humid Ratio |
0.0186 |
0.0157 |
0.0187 |
0.0156 |
0.0187 |
0.0157 |
0.0131 |
0.0157 |
0.0131 |
0.0110 |
0.0132 |
0.0110 |
0.0132 |
0.0110 |
0.0132 |
0.0110 |
0.0092 |
0.0111 |
0.0092 |
0.0111 |
0.0092 |
LBm/LBd |
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Specific Volume |
13.90 |
13.70 |
13.90 |
13.70 |
13.90 |
13.70 |
13.50 |
13.70 |
13.50 |
13.35 |
13.50 |
13.35 |
13.50 |
13.35 |
13.50 |
13.30 |
13.20 |
13.30 |
13.20 |
13.30 |
13.20 |
Ft3/LBd |
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Air Volume (cfm) |
Water Evaporation Rate - Air Stream Moisture Addition (gph) per 1,000
cfm |
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1,000 |
4.0 |
4.6 |
3.5 |
4.1 |
2.9 |
3.5 |
4.1 |
2.9 |
3.5 |
4.2 |
3.0 |
3.5 |
2.4 |
3.0 |
1.8 |
2.4 |
3.0 |
1.8 |
2.4 |
1.2 |
1.8 |
gal/hr |
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