【摘要】 所建立的小型制冷系统模型包括压缩机、冷凝器、膨胀阀和蒸发器四个部件模型以及使系统封闭的充灌量模型,实现了所有相关物性参数计算的程序化以便于模型的数值求解。在蒸发器模型中提出了析湿系数的新算法,加速了模型的计算。用所建立的模型模拟工作参数的变化对系统性能的影响,其结果与实际规律相符合,证明了该模型的正确性。根据模型得出的定量结果可分析各性能参数变化的相互影响,并对性能参数的敏感性进行分析,为系统优化和控制提供理论依据。此外,换热器模型还可独立用于各种换热器性能的分析与优化。更多还原

【Abstract】 The mini-refrigerating system consists of compressor,condenser,evaporator,expansion valve and charge inventory models.The calculation of physics properties is finished by programming which makes solving of system model more conveniently.The new arithmetic of moisture absorption coefficient is deduced which accelerates calculation of the model.The simulation result of work parameters on system performance accords with actual rules,which proves the model correct.Quantitative results of model can be used to analyze impact of performance parameters on each other and their sensitivity to work parameters,offering theoretical basis for the system optimum and control.Furthermore,heat exchanger models can be used to analyze and optimize heat exchangers’ performance.更多还原