Theoretical optimization of a regenerated air refrigerator

摘要: The performance analysis and optimization of a regenerated air refrigerator is carried out by taking the cooling load density, i.e. ratio to maximum specific volume in cycle, as objective using finite-time thermodynamics or entropy generation minimization this paper. Analytical relationships between density pressure ratio, well coefficient (COP) are derived. irreversibilities considered include heat transfer losses hot- cold-side exchangers regenerator, non-isentropic compression expansion compressor expander, drop piping. comparison cycle performances under conditions performed. optimal characteristics obtained optimizing compressor, searching optimum distribution conductances regenerator for fixed total exchanger inventory. influences effectivenesses exchangers, efficiencies expander recovery coefficient, temperature reservoirs on COP examined shown numerical examples.