| Sl. No | Factors | |||
| Levels | Flow rate (lit/min) | HTF inlet temperature (˚C) | PCM capsule shape | |
| 1 | 1 | 2 | 56 | Cylindrical |
| 2 | 2 | 4 | 58 | Square |
| 3 | 3 | - | 60 | Sphere |