水产品低温贮藏库的节能分析

通过利用线性拟合的方法对氨的物性进行模拟，在变冷凝温度和变冷间温度，以及在蒸发器和冷凝器压力降变化的条件下，分别对冷库中的氨双级蒸汽压缩系统进行能量分析，对系统各部件的炯损失和系统的炯效率进行计算分析，得出随着冷凝温度和冷间温度的改变，系统各设备的炯损失的排序变化的结果，以及随着压力降的变化系统的性能发生了变化，提出改进系统的性能可从减少冷凝传热温差和减少冷间传热温差，提高冷却水有效利用，改善蒸发器的压力降方面考虑。

Exergy-Saving Analysis of Ammonia Vapor Compression Refrigeration Systems in Cold Store

This paper presents a detailed thermodynamics and exergy analysis of an actual ammonia two-stage vapour compression refrigeration cycle in the cold store on variational condensing temperature, and on variational room temperature, using linear method of fitting the physical properties of ammonia to simulate, and the pressure drop in evaporator （ 8P, ） and condenser （δPcon） are change. A computational model has been developed for computing exergy destruction of the various components of the refrigeration system, exergefic effciency of the system, coefficient of performance. The results indicate that the exergy destruction percent of component of the vapour compression system is change with increase in condensing temperature and room temperature, the coefficient of performance （ COP ） and the exergetic efficiency of the system are change with increase in the pressure drop in evaporator and condenser. To improve the performance of the system, we must consider decreasing temperature difference between the evaporator and refrigerated space and between the condenser and outside air, and reducing the pressure drop in the evaporator.