Table 2. Alteration of thermal conditions during experimental period.
| Items | HS | AC | WC |
|---|---|---|---|
| Temperature (°C) | |||
| Means | 30.72 | 26.87 | 28.81 |
| Maximum | 31.87 | 29.83 | 30.60 |
| Minimum | 29.02 | 24.19 | 27.19 |
| SD | 0.73 | 1.92 | 1.05 |
| Relative humidity (%) | |||
| Means | 78.91 | 78.95 | 80.03 |
| Maximum | 85.22 | 92.17 | 88.68 |
| Minimum | 70.24 | 68.59 | 73.15 |
| SD | 4.29 | 5.31 | 4.28 |
| THI | |||
| Means | 83.94 | 77.77 | 81.05 |
| Maximum | 86.40 | 82.08 | 84.17 |
| Minimum | 80.79 | 73.93 | 77.73 |
| SD | 1.45 | 2.95 | 1.86 |
HS, without any cooling; AC, air-cooling; WC, water-drip cooling; THI, temperature-humidity index.