Blow Molding & Hollow Plastic Products worked example

Energy per Bottle with blow molding line connected load of 73 kW: a worked example

This worked example runs the energy per bottle numbers for a tougher week than the baseline: blow molding line connected load of 73 kW instead of the typical 145 kW. Estimate electricity cost and energy use for blow molded bottle or container production from connected load, runtime, energy rate, and units processed.

The inputs for this scenario

  • Blow molding line connected load: 73 kW (the input this scenario stresses; the baseline uses 145)
  • Production runtime: 12 hr (held at the documented default)
  • Blended electricity rate: 0.12 $ / kWh (held at the documented default)
  • Accepted containers processed: 42,000 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Blow molding energy cost = blow molding line connected load × line runtime × blended electricity rate.
  • Blow molding energy cost works out to 105 $ at these inputs, and this is the headline figure for the scenario.
  • Blow molding energy used works out to 876 kWh at these inputs.
  • Energy cost per bottle works out to 0 $ / bottle at these inputs.
  • Hourly blow molding energy cost works out to 8.76 $ / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where blow molding line connected load sits at 145 kW and the headline result is 209 $, this scenario comes in 49.66% below the baseline at 105 $.
  • Use it when quoting a new container, comparing line efficiency, or building an energy baseline for a continuous-improvement target. 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

  • Blow molding energy cost: 105 $ (headline result)
  • Blow molding energy used: 876 kWh
  • Energy cost per bottle: 0 $ / bottle
  • Hourly blow molding energy cost: 8.76 $ / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Energy per Bottle calculator, set blow molding line connected load to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.