District Energy & Thermal Network Equipment worked example

Pipe Heat Loss with pipe heat-loss rate of 6 kW: a worked example

This worked example runs the pipe heat loss numbers for a tougher week than the baseline: pipe heat-loss rate of 6 kW instead of the typical 12 kW. Estimate heat lost from buried, tunnel, or above-grade district heating piping and the cost of that loss over an operating period.

The inputs for this scenario

  • Pipe heat-loss rate: 6 kW (the input this scenario stresses; the baseline uses 12)
  • Network operating hours: 8 hr (held at the documented default)
  • Thermal energy cost basis: 0.12 $ / kWh (held at the documented default)
  • Pipe length or sections represented: 1,000 m, ft, or sections (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Pipe thermal energy lost = pipe heat-loss rate × network operating hours.
  • Pipe thermal energy lost works out to 48 kWh at these inputs, and this is the headline figure for the scenario.
  • Pipe heat-loss energy cost works out to 5.76 $ at these inputs.
  • Heat-loss cost per length or section works out to 0.01 $ / piece at these inputs.
  • Hourly pipe heat-loss cost works out to 0.72 $ / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where pipe heat-loss rate sits at 12 kW and the headline result is 96 kWh, this scenario comes in 50% below the baseline at 48 kWh.
  • Use it to quantify standing distribution losses, prioritize re-insulation, or build a heat-loss line into network operating cost. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Pipe thermal energy lost: 48 kWh (headline result)
  • Pipe heat-loss energy cost: 5.76 $
  • Heat-loss cost per length or section: 0.01 $ / piece
  • Hourly pipe heat-loss cost: 0.72 $ / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Pipe Heat Loss calculator, set pipe heat-loss rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.