Desalination & Membrane Water Treatment Equipment worked example

Pressure Vessel Test Energy Load with test pump connected load of 6 kW: a worked example

This worked example runs the pressure vessel test energy load numbers for a tougher week than the baseline: test pump connected load of 6 kW instead of the typical 12 kW. Estimate electricity use and cost for pressure vessel, membrane housing, or skid hydrotest and pressure test operations before shipment or commissioning.

The inputs for this scenario

  • Test pump connected load: 6 kW (the input this scenario stresses; the baseline uses 12)
  • Pressure test runtime: 8 hr (held at the documented default)
  • Blended electricity rate: 0.12 $ / kWh (held at the documented default)
  • Vessels or skids tested: 1,000 tests (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total pressure test energy cost = test pump connected load × pressure test runtime × blended electricity rate.
  • Pressure test energy used works out to 48 kWh at these inputs, and this is the headline figure for the scenario.
  • Total pressure test energy cost works out to 5.76 $ at these inputs.
  • Energy cost per tested vessel or skid works out to 0.01 $ / piece at these inputs.
  • Hourly pressure test energy cost works out to 0.72 $ / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where test pump connected load sits at 12 kW and the headline result is 96 kWh, this scenario comes in 50% below the baseline at 48 kWh.
  • Use it when costing a test-bay operation, allocating energy into per-unit product cost, or evaluating pump or runtime changes. 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

  • Pressure test energy used: 48 kWh (headline result)
  • Total pressure test energy cost: 5.76 $
  • Energy cost per tested vessel or skid: 0.01 $ / piece
  • Hourly pressure test energy cost: 0.72 $ / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Pressure Vessel Test Energy Load calculator, set test pump connected load to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.