TEMPERATURE–HEATDIAGRAMANALYSISMETHODFORMULTI-STAGEHEAT REGENERATION PHYSICAL ADSORPTIONREFRIGERATIONCYCLE

摘要

The method of temperature–heat(T-Q)diagram analysis was proposed in this paper. In T-Qdiagram, the area between two process curves along the temperature axis represents the irreversibilitydegreeinthe heat transfer process, which has the same dimension with entransy dissipation. The diagram can be used to optimize the heat exchange configuration and the heat exchanger network of an adsorption refrigeration system. The proposed T–Qdiagram and the traditional COP, exergy and entropy analysis were adopted to a multi-stageheat regenerative adsorption chillerunder different heat regenerationschemes. The results showthat the optimal schemedetermined through T-Qdiagram and cycle entropy production analysis are identical, whileT–Qdiagram is more intuitionalsince the analysis is done graphically.If consider a complete heat regeneration between two adsorption beds, the performance of the multi-stage chiller with different heat regeneration schemes should be almost the same.