Coffee, Tea, Roasting & Dry Goods Processing worked example

Energy Per Batch with roaster or dryer connected load of 95 kW: a worked example

What does the result look like when roaster or dryer connected load reaches 95 kW? The full calculation is worked below with real intermediate numbers. estimating utility cost for roasting, drying, grinding, or processing batches

The inputs for this scenario

  • Roaster or dryer connected load: 95 kW (raised for this scenario; the documented default is 38)
  • Batch runtime: 0.42 hr (unchanged)
  • Blended energy rate: 0.16 $/kWh (unchanged)
  • Finished batch output: 84 lb (unchanged)

Working through the calculation

  • Applying the documented formula (Total energy per batch = roaster or dryer connected load × batch runtime × blended energy rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 0.05 $ / lb for good output capacity, the number this scenario is built around.
  • At this operating point the engine returns 39.9 $ / lb for gross capacity.
  • At this operating point the engine returns 39.84 $ / lb for uptime loss.
  • At this operating point the engine returns 0.01 $ / lb for yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where roaster or dryer connected load sits at 38 kW and the headline result is 0.02 $ / lb, this scenario comes in 150% above the baseline at 0.05 $ / lb.
  • A figure at this level is achievable when roaster or dryer connected load is genuinely sustained, not just peaked for a shift. Connected load is not the same as actual average draw — roasters modulate during a roast — so use a measured or duty-cycle-adjusted load, otherwise the per-pound cost will be overstated.

Results at a glance

  • Good output capacity: 0.05 $ / lb (headline result)
  • Gross capacity: 39.9 $ / lb
  • Uptime loss: 39.84 $ / lb
  • Yield loss: 0.01 $ / lb

Run it with your numbers

  • Every input above is editable in the live Energy Per Batch calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.