page_title: Ericsson cycle
section_title: Ideal Ericsson cycle
hierarchical_section_title: Ericsson cycle / Ideal Ericsson cycle
caption_attribution_description: Description= p-v-Diagramm und T-s-Diagramm eines Ericsson-Motors
context_page_description: The Ericsson cycle is named after inventor John Ericsson who designed and built many unique heat engines based on various thermodynamic cycles. He is credited with inventing two unique heat engine cycles and developing practical engines based on these cycles. His first cycle is now known as the closed Brayton cycle, while his second cycle is what is now called the Ericsson cycle.
  Ericsson is one of the few who built open-cycle engines, but he also built closed-cycle ones.
context_section_description: The following is a list of the four processes that occur between the four stages of the ideal Ericsson cycle:
  Process 1 -> 2: Isothermal compression.  The compression space is assumed to be intercooled, so the gas undergoes isothermal compression. The compressed air flows into a storage tank at constant pressure.  In the ideal cycle, there is no heat transfer across the tank walls.
  Process 2 -> 3: Isobaric heat addition.  From the tank, the compressed air flows through the regenerator and picks up heat at a high constant-pressure on the way to the heated power-cylinder.
  Process 3 -> 4: Isothermal expansion.  The power-cylinder expansion-space is heated externally, and the gas undergoes isothermal expansion.
  Process 4 -> 1: Isobaric heat removal.  Before the air is released as exhaust, it is passed back through the regenerator, thus cooling the gas at a low constant pressure, and heating the regenerator for the next cycle.
caption: Ideal Ericsson cycle
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