Table VII.
Percent of 3-Month period below 20°C | |||||
---|---|---|---|---|---|
Control Device Operation | |||||
0.82 m3 s−1 pit fan flowrate 1.65 m3 s−1 pit fan flowrate | |||||
APC Flowrate, m3 s−1 (cfm) |
%Recirculation | 2 heaters | 4 heaters | 2 heaters | 4 heaters |
0.24 (500) | 0 | 0 | 0 | 93 | 0.5 |
25 | 0 | 0 | 92 | 0 | |
50 | 0 | 0 | 90 | 0 | |
75 | 0 | 0 | 87 | 0 | |
100 | 0 | 0 | 84 | 0 | |
0.47 (1000) | 0 | 39 | 0 | 98 | 25 |
25 | 22 | 0 | 96 | 15 | |
50 | 0 | 0 | 93 | 0.5 | |
75 | 0 | 0 | 90 | 0 | |
100 | 0 | 0 | 84 | 0 | |
0.94 (2000) | 0 | 90 | 0 | 100 | 64 |
25 | 75 | 0 | 100 | 44 | |
50 | 38 | 0 | 98 | 25 | |
75 | 0 | 0 | 93 | 0.5 | |
100 | 0 | 0 | 84 | 0 | |
1.89 (4000) | 0 | 100 | 76 | 100 | 96 |
25 | 99 | 35 | 100 | 89 | |
50 | 90 | 0 | 100 | 64 | |
75 | 39 | 0 | 98 | 25 | |
100 | 0 | 0 | 84 | 0 |
Bold values (0 days) indicate temperature conditions are acceptable for optimum pig growth at the operation conditions indicated.