Generalized ideal reference cycle for regenerative refrigeration: Part 2. Adiabatic systems

A generalized ideal reference cycle for regenerative refrigeration systems is discussed. The cycle has adiabatic processes of compression and expansion. Cyclic heat addition to and rejection from the cycle occur at constant pressure or constant volume immediately preceding the regenerative thermal processes. These are assumed to occur partly at constant volume, partly at constant pressure. Equations are developed for cycle work, heat lifted, coefficient of performance and the pressure ratio: mean effective/maximum cycle pressures. Various special cases are deduced from the generalized analysis including the pseudo-Stirling and pseudo-Ericsson cycles.Results are presented for the Stirling and pseudo-Stirling cycles to illustrate the effect of volume compression ratio and regenerative effectiveness on the cycle Coefficient of Performance. The pressure ratio p_mean/p_max for the same two cycles are compared to a function of the volume compression ratio.