Research Article
Numerical Study of Electromagnetic Loss and Heat Transfer in an Oil-Immersed Transformer
Table 2
Electromagnetic loss densities for different regions with different computational grids.
| | Total grid numbers | Regions | Maximal grid size (cm) | Minimal grid size (cm) | Grid numbers | Metal components (W/m2) | Oil tank (W/m2) | HV coil (W/m3) | LV coil (W/m3) | Core (W/m3) |
| | 218 624 | Core | 4.96 | 1.90 | 57 147 | 16.56 | 0.61 | 22 137 | 30 600 | 10 809 | | Coil | 5.42 | 4.04 | 3 540 | | Metal component | 7.07 | 1.47 | 21 008 | | Oil | 26.81 | 1.11 | 157 937 | | Oil tank | 24.27 | 6.46 | 1 278 |
| | 395 891 | Core | 4.51 | 1.61 | 100 343 | 16.62 | 0.61 | 22 072 | 30 833 | 10 831 | | Coil | 3.60 | 2.52 | 13 311 | | Metal component | 6.50 | 1.11 | 33 630 | | Oil | 23.25 | 1.11 | 282 237 | | Oil tank | 18.66 | 5.78 | 1 970 |
| | 713 851 | Core | 2.93 | 1.23 | 237 521 | 16.77 | 0.61 | 22 064 | 30 828 | 10 815 | | Coil | 3.61 | 2.02 | 24 240 | | Metal component | 5.96 | 1.19 | 51 438 | | Oil | 16.78 | 1.40 | 452 090 | | Oil tank | 12.19 | 8.26 | 3 968 |
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