Calculators › Benchmarking, budgets and carbon Weighted source-energy total calculator
Weighted source-energy total
Source energy sums delivered-energy categories after applying their explicitly supplied source multipliers; this arithmetic is derived from the source-energy definition.
Units IP (US) SI (metric)
E source = E electric × f electric + E fuel × f fuel E_{\text{source}} = E_{\text{electric}} \times f_{\text{electric}} + E_{\text{fuel}} \times f_{\text{fuel}} E source = E electric × f electric + E fuel × f fuel E source = E electric × f electric + E fuel × f fuel E_{\text{source}} = E_{\text{electric}} \times f_{\text{electric}} + E_{\text{fuel}} \times f_{\text{fuel}} E source = E electric × f electric + E fuel × f fuel
Calculator
Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.
Worked example
Given
E electric E_{\text{electric}} E electric 700 MMBtu f electric f_{\text{electric}} f electric 2.4 ratio E fuel E_{\text{fuel}} E fuel 1,200 MMBtu f fuel f_{\text{fuel}} f fuel 1.05 ratio E source = 700 × 2.4 + 1200 × 1.05 = 2 , 940 E_{\text{source}} = 700 \times 2.4 + 1200 \times 1.05 = 2{,}940 E source = 700 × 2.4 + 1200 × 1.05 = 2 , 940
Given
E electric E_{\text{electric}} E electric 800 GJ f electric f_{\text{electric}} f electric 2.2 ratio E fuel E_{\text{fuel}} E fuel 1,400 GJ f fuel f_{\text{fuel}} f fuel 1.08 ratio E source = 800 × 2.2 + 1400 × 1.08 = 3 , 272 E_{\text{source}} = 800 \times 2.2 + 1400 \times 1.08 = 3{,}272 E source = 800 × 2.2 + 1400 × 1.08 = 3 , 272
Symbols and units
Symbol Meaning Unit
E source E_{\text{source}} E source source-energy total MMBtu E electric E_{\text{electric}} E electric site electricity converted to heat units MMBtu f electric f_{\text{electric}} f electric specified electricity source multiplier ratio E fuel E_{\text{fuel}} E fuel site fuel heat input MMBtu f fuel f_{\text{fuel}} f fuel specified fuel source multiplier ratio
Symbol Meaning Unit
E source E_{\text{source}} E source source-energy total GJ E electric E_{\text{electric}} E electric site electricity converted to heat units GJ f electric f_{\text{electric}} f electric specified electricity source multiplier ratio E fuel E_{\text{fuel}} E fuel site fuel heat input GJ f fuel f_{\text{fuel}} f fuel specified fuel source multiplier ratio
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