Power, oxygen and gas consumption are measured all day, but often compared with norm only in the next morning’s report, after the shift that could have acted has gone home.
An energy norm is the expected consumption of a utility (power, oxygen, fuel gas, steam, water) per tonne of output for a given unit and product. A variance is the difference between actual and norm.
| Utility | Typical basis | Track by |
|---|---|---|
| Electrical power | Per tonne of output | Unit and shift |
| Oxygen | Per tonne or per heat | Unit and shift |
| Fuel gases | Per tonne of output | Unit and shift |
| Steam and water | Per tonne of output | Unit and day |
A variance is only as good as the meter behind it. Flag stale or missing readings openly rather than hiding them in a total.
Steel Twin is a digital-twin control room for integrated steel plants. It joins PLC and SCADA, the historian, MES, LIMS, ERP, EAM and energy data on heat_id, so every heat is traced from charge to coil with its grade, sales order, route and chemistry. Every event keeps its source timestamp and a quality flag, so stale data is never hidden. Holds arrive with re-treat or regrade options priced against the order they affect and similar past heats; holds, sequence risks and energy variances against norm are pushed to the shift controller, and one tap logs the decision to the genealogy. A single action queue is ranked by cost and urgency, and any shift can be replayed with its sources. Delivery starts with steelmaking and casting on one shop, then adds energy, asset health, iron-making, mills and dispatch on the same record.
The expected consumption of a utility such as power, oxygen or fuel gas per tonne of output for a given unit and product.
The causes of overruns happen in the shift and the people who can correct them are on it; a daily total arrives too late and hides the cause.
Meter readings from energy management or the historian, production from MES, and agreed norms per unit and product.
See it on your own data. Steel Twin — Every heat, traced to the coil. Book a 30-minute working session with an engineer.
