ISOTHERMAL heat addition2-3 reversible adiabatic expansion3-4 isothermal heat rejection4-1 reversible adiabatic compressionA cycle is said to be reversible only when each process in a cycle is reversible.Carnot cycle consists of 2 isothermal and 2 adiabatic PROCESSES.STIRLING cycle:A Stirling cycle consists of two reversible isothermal and two reversible constant volume (isochoric) processes.Diesel cycle:Diesel cycle consists of two isentropic, one constant volume and one constant pressure processes OTTO cycle:Otto cycle consists of two isentropic, two constant volume processes.Brayton cycle:Brayton cycle consists of two isentropic, two constant pressure processes.Rankine cycle:Rankine cycle consists of two isentropic, two constant pressure processesBell-Coleman cycle:Bell-Coleman cycle consists of two isentropic, two constant pressure processesBell Coleman cycle is also known as Reversed Brayton cycle or Reversed Joule cycleVapour compression refrigeration cycle:Vapour compression refrigeration cycle consists of two isentropic, two constant pressure processes