Power Cycles — Composition of the Ericsson Cycle Does the ideal Ericsson cycle consist of two constant-pressure (isobaric) processes and two isothermal processes with regeneration?

Introduction:
The Ericsson cycle is an external-combustion or gas-cycle model emphasizing heat regeneration. Understanding its process composition helps distinguish it from Brayton (Joule) and Stirling cycles and clarifies where ideal efficiency originates.

Given Data / Assumptions:

• Idealized, reversible processes.
• Perfect regenerator with no losses.
• Working fluid treated as an ideal gas.

Concept / Approach:
In the Ericsson cycle, heat addition and rejection occur isothermally, while compression and expansion occur at constant pressure with regeneration. The regeneration transfers heat from the exhaust isobar to the intake isobar, theoretically enabling Carnot efficiency between the same temperature limits when regeneration is perfect.

Step-by-Step Solution:
Identify the four processes: (1) isothermal heat addition at high temperature, (2) isobaric expansion with heat exchange in regenerator, (3) isothermal heat rejection at low temperature, (4) isobaric compression with regenerator heat recovery.Confirm that two of these are isothermal and two are isobaric.Hence the statement is correct.

Verification / Alternative check:
Comparing with the Brayton (Joule) cycle (two isobars + two isentropes) and the Stirling cycle (two isothermals + two isochoric processes) further confirms the Ericsson composition.

Why Other Options Are Wrong:
“Disagree” would conflate Ericsson with Brayton or Stirling and ignore the defining isothermal segments with regeneration.

Common Pitfalls:
Omitting the regenerator in the ideal description; mixing constant-volume with constant-pressure segments.

Final Answer:
Agree