Energy efficiency

reducing energy consumption

ratio between the useful energy output and the input of a machine

minimizing the amount of energy used for a given, constant energy service

The RETScreen Clean Energy Management Software (usually shortened to RETScreen Expert) is a software package developed by the Government of Canada. RETScreen Expert was highlighted at the 2016 Clean Energy Ministerial held in San Francisco. The Government of Canada's Treasury Board Secretariat uses RETScreen Expert as its greenhouse gas reporting tool for all federal departments and agencies required to report emissions.

inspection, survey and analysis of energy flows for energy conservation in a building, process or system to reduce the amount of energy input into the system

fuel efficiency within a shaft reciprocating engine

gas combustion process

indicator: ratio that describes how efficiently a computer data center uses energy; specifically, how much energy is used by the computing equipment (in contrast to cooling and other overhead)

form of thermal efficiency

Planning and operation of energy production and energy consumption units