ClueLuma

Useful fuel heat price calculator

Price per useful heat is calculated as r_input / η. Use the stated system boundary and matching input units.

Units
ruseful=rinputηr_{\text{useful}} = \frac{r_{\text{input}}}{\eta}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

$/MMBtu
—
$/MMBtu

Worked example

Given

  • rinputr_{\text{input}} = 100 $/MMBtu
  • η\eta = 0.8 —
ruseful=1000.8=125r_{\text{useful}} = \frac{100}{0.8} = 125

Symbols and units

SymbolMeaningUnit
rusefulr_{\text{useful}}price per useful heat$/MMBtu
rinputr_{\text{input}}price per fuel heat$/MMBtu
η\etaequipment efficiency—

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Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.