Performance Adjustment Factors
Table 6 Enthalpy of Saturated Air
Wet Bulb |
|
Temperature | Btu per Pound |
|
|
41 | 15.70 |
43 | 16.66 |
42 | 16.17 |
43 | 16.66 |
|
|
44 | 17.15 |
45 | 17.65 |
46 | 18.16 |
47 | 18.68 |
|
|
48 | 19.21 |
49 | 19.75 |
50 | 20.30 |
51 | 20.86 |
|
|
52 | 21.44 |
53 | 22.02 |
54 | 22.62 |
55 | 23.22 |
|
|
56 | 23.84 |
57 | 24.48 |
58 | 25.12 |
59 | 25.78 |
|
|
60 | 26.46 |
61 | 27.15 |
62 | 27.85 |
63 | 28.57 |
|
|
64 | 29.31 |
65 | 30.06 |
66 | 30.83 |
67 | 31.62 |
|
|
68 | 32.42 |
69 | 33.25 |
70 | 34.09 |
71 | 34.95 |
|
|
72 | 35.83 |
73 | 36.74 |
74 | 37.66 |
|
|
Altitude/Temperature Correction
Air Density
Ratio (Density
at New
Air Density)
Condition/Std.
Air Handler Leaving AirTemperature (degrees F)
Figure 18. Air Density Ratios
Table 7 Cooling Capacity Altitude Correction Factors
|
|
| Altitude (Ft.) |
|
|
|
| |
| Sea Level | 1000 | 2000 | 3000 | 4000 | 5000 | 6000 | 7000 |
Cooling Capacity Multiplier |
|
|
|
|
|
|
|
|
1.00 | 0.99 | 0.99 | 0.98 | 0.97 | 0.96 | 0.95 | 0.94 | |
|
|
|
|
|
|
|
|
|
Sensible Heat Ratio Correction Multiplier | 1.00 | .98 | .95 | .93 | .91 | .89 | .87 | .85 |
|
|
|
|
|
|
|
|
|
Table 8 Gas Heating Capacity Altitude Correction Factors
| Sea Level To 2000 | 2001 to | 2501 to | 3501 to | 4501 to | 5501 to | 6501 to |
|
| 2500 | 3500 | 4500 | 5500 | 6500 | 7500 |
Capacity Multiplier |
|
|
|
|
|
|
|
1.00 | .92 | .88 | .84 | .80 | .76 | .72 | |
|
|
|
|
|
|
|
|
37 |