Waste-to-Energy Equipment worked example

Refractory Wear Reserve at 25% wear-zone exposure share: a worked example

This worked example runs the refractory wear reserve numbers for a tougher week than the baseline: 25% wear-zone exposure share instead of the typical 35%. Estimates the refractory wear reserve for a waste-to-energy unit by combining lining area, installed reline rate, and the share of lining expected to wear within the campaign.

The inputs for this scenario

  • Furnace Refractory Lining Area: 2,400 sq ft (held at the documented default)
  • Reline Material & Install Rate: 185 $/sq ft (held at the documented default)
  • Wear-Zone Exposure Share: 25 % (the input this scenario stresses; the baseline uses 35)
  • Scaffold & Cooldown Setup: 42,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Reserve = lining area x installed rate x wear-zone exposure % + setup cost.
  • Total refractory wear reserve cost works out to 153,000 $ at these inputs, and this is the headline figure for the scenario.
  • Refractory wear reserve cost per unit works out to 63.75 $ / piece at these inputs.
  • Variable refractory wear reserve cost works out to 111,000 $ at these inputs.
  • Fixed refractory wear reserve adder works out to 42,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where wear-zone exposure share sits at 35% and the headline result is 197,400 $, this scenario comes in 22.49% below the baseline at 153,000 $.
  • Use it when building an annual maintenance reserve, planning a furnace reline outage, or comparing refractory material grades on a cost-per-square-foot basis. 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

  • Total refractory wear reserve cost: 153,000 $ (headline result)
  • Refractory wear reserve cost per unit: 63.75 $ / piece
  • Variable refractory wear reserve cost: 111,000 $
  • Fixed refractory wear reserve adder: 42,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Refractory Wear Reserve calculator, set wear-zone exposure share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.