UV dose (mJ/cm²) delivered by a ballast-water UV treatment system - compared to the reference 40 mJ/cm² target per USCG BWMS type-approval practice.
Formula
$$ D_{UV} = I \cdot t \cdot \text{UVT} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $I$ | UV intensity at sleeve | mW/cm² | UV sensor |
| $t$ | Residence time in chamber | s | flow/volume |
| $UVT$ | UV transmittance | - | lab test |
Sources
- IMO BWM Convention / MEPC.300(72).
- USCG BWMS Type-Approval.