ESL “Energese”

is abbreviation for Energy Systems Language, also referred as Energy Circuit Language, or Generic Systems Symbols/Language. It was developed by the ecologist Howard T. Odum and colleagues in the 1950s during studies of the tropical forests funded by the United States Atomic Energy Commission. The main purpose is to be used to create energy flow diagrams in the field of system ecology.


stencils10 objects ESL Energese Stencils


  • facilitate the generic depiction of energy flows through any scale system
  • facilitate the intellectual analysis, engineering synthesis and management of global systems


The samples you see below were created in Grafio using the ELS “Energese” stencils. You can download any sample and open it in Grafio.

Maximum Power Transfer Efficiency in Generic Energy Systems Language

BPMN, Diagram, Leave Application Proccess