Energy Balance and Energy Ratio

Energy balance and energy payback ratio

The terms "energy balance" and "energy payback ratio", or "energy ratio", are used to describe system energy output related to system energy input.

The energy balance can be expressed as

Eo = dE + Ei                    (1)


dE = Eo - Ei                     (1b)


dE = energy balance

Eo = energy output

Ei = energy input

The energy ratio - system energy output to system energy input - can be expressed as

ER = Eo / Ei                      (2)


ER = energy ratio

Related Topics

  • Environment - Climate, meteorology, sun, wind and environmental resources
  • Statics - Loads - force and torque, beams and columns

Related Documents

  • 1st Law of Thermodynamics - The First Law of Thermodynamics simply states that energy can be neither created nor destroyed (conservation of energy). Thus power generation processes and energy sources actually involve conversion of energy from one form to another, rather than creation of energy from nothing
  • Ratios and Proportions - Relative values between quantities - ratios and proportions

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