Wedge — Energy

Joules per tonne,
as a query.

Energy intensity is how every heavy-industry P&L is actually read. On PlantOS it’s the unit of the API, not a downstream spreadsheet. Live, receipted, queryable.

Why this is the unit

Cost, contract, and control all read the same number.

COST

Energy is the line

In a smelter, electricity is a third of operating cost. In a refinery, steam and fired-heater fuel set the margin. A 1% intensity move is a real number on a real P&L.

OFFTAKE

Customers ask for it

Green-bond reporting, low-carbon-product premiums, customer scope-3 packets all demand per-tonne intensity figures with provenance. The premium is paid only against verifiable numbers.

OPS

Operators tune to it

Joules-per-tonne is the single number an operator can move shift-to-shift. Surfacing it live, with provenance, is what turns the metric into a control input.

Joules per tonne — input normalisation through process to ratio Three energy inputs on the left — electricity in kilowatt-hours, fuel in megajoules, and gas in cubic metres — converge on a summation node that normalises them to joules. The joules flow into a process unit, and tonnes of product flow out. The ratio is rendered on the right as MJ per tonne. kWh electricity MJ fired heat m³ gas Σ joules process tonnes of product MJ t Inputs normalised · process measured · ratio queryable, receipted, real-time

Per unit of product

Same accounting, every domain.

REFINERY

Crude unit

MJ of fired-heater fuel + steam per barrel of throughput, rolled up by unit and by campaign.

SMELTER

Aluminium potline

kWh per tonne of metal, normalized to current efficiency and bath temperature.

STEEL

EAF charge

MJ per tonne of liquid steel, separating power, oxygen, and burner inputs.

CEMENT

Kiln line

MJ per tonne of clinker, with alternative-fuel substitution rate as a sibling figure.

AMMONIA

Reformer + synth

GJ per tonne of NH₃, with natural-gas feed split from fuel.

DATA

Data centre

Joules per inference, joules per token, joules per query — the same accounting, different unit of product.

Joules is the universal unit of the Transaction Science platform. PlantOS reads it where it’s already the customer’s unit.

API

Energy intensity, with the chain attached.

# Joules per tonne of product, over the last 24 hours
GET /api/v1/plant/energy/intensity/{asset}?window=24h&unit=mj_per_t

# Response carries the aggregate receipt
{
  "asset": "potline-3",
  "intensity_mj_per_t": 49680.0,
  "window": "24h",
  "samples": 86400,
  "receipt": "rcpt:ag-019e..."
}

# Drill into the chain
GET /api/v1/plant/receipt/{receipt_id}
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