WUE_CALC
Water Usage Effectiveness — litres of site water per IT kWh, accumulated over a reporting period with gap accounting.
When to use it
Use WUE_CALC when an evaporatively cooled site meters its makeup water and its IT load, and has to report litres per IT kWh for a sustainability disclosure or a local abstraction licence.
Interface
The published port signature. This is the whole of what the block exposes to your program — the implementation body is not shown here and ships with the download.
Inputs
| Port | Type | Unit |
|---|---|---|
| ENABLE | BOOL | — |
| WATER_LPM | REAL | L/min |
| IT_KW | REAL | kW |
| WTR_OK | BOOL | — |
| PWR_OK | BOOL | — |
| CYCLE | TIME | — |
| MIN_KWH | REAL | kWh |
| WUE_HI | REAL | L/kWh |
| WUE_DB | REAL | L/kWh |
| GAP_DLY | TIME | — |
| DRY_MIN_KW | REAL | kW |
| DRY_DLY | TIME | — |
| RESET | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| WUE | REAL | L/kWh |
| WUE_LAST | REAL | L/kWh |
| WUE_LAST_VALID | BOOL | — |
| WATER_L | LREAL | L |
| IT_KWH | LREAL | kWh |
| PERIOD_PCT | REAL | % |
| GAP_S | REAL | s |
| GAP_S_LAST | REAL | s |
| VALID | BOOL | — |
| ALM_MTR_FAULT | BOOL | — |
| ALM_WUE_HIGH | BOOL | — |
| ALM_DATA_GAP | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Validation evidence
- Tests
- 12
- Simulated scans
- 2155
- Simulator
- v0.1.0
Complete IEC 61131-3 implementation with a published test suite that runs on the vplant simulator. The counts above are that suite, executed on this build.
- Conforms to IEC 61131-3
Download WUE_CALC — free
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Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.