- Alternating current. Mode of transmission of energy, predominant in public supply, in which the voltage varies (usually sinusoidally) between positive and negative limits, typically at 50 cycles per second.
- Activity-based targets
- The process of estimating expected consumption volumes by
reference to production throughput, prevailing weather
and other “driving factors”. Comparison between expected and actual
consumption reveals randomly-occurring accidental avoidable waste.
- Air handling unit - a device used to condition and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system.
- Air compressors
- Read article...
- Air conditioning
- Use of energy in chillers to provide comfortable
temperatures (and sometimes humidities) during hot weather. Read this
article on how to minimise demand
for comfort cooling.
- Instrument for measuring the flow of electric current. Where automatically
read and results are stored in a database, can be used as a proxy for energy
- Automatic meter reading Read article...
- Ill-defined term usually denoting automatic meter reading
coupled to an analysis and reporting scheme. More..
- Air source heat pump. Refrigeration device employed typically for providing heat by cooling the outside air; sometimes reversible so as to provide air cooling.
- Aspects, energy
- The concept of "energy aspect" first appeared in national energy-management-system
standards like IS393 and later EN16001. It was dropped in their successor, ISO50001.
See this article from 2010 discussing the value of the idea.
- Audit, energy
- Systematic inspection of a building, facility, process or transport fleet
undertaken with the aim of identifying significant opportunities
for improvement in energy efficiency. Requirements are given in the
EN16247 European Standard.
- Automatic controls
- See Controls, automatic.
- Avoidable waste
- Excess energy consumption, often occurring at random, which can
be cured quickly at little or no cost and without disruption Examples...