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分析了多室内蒸发器的冰蓄冷柜式空调系统的流程和性能优点 ,建立了蓄冰槽充冷过程的数学物理模型 ,对换热管的每一个管段 ,根据热阻网络建立了描述其换热过程的差分方程组 .对方程组的求解得到了系统充冷过程的描述 ,揭示了该系统在制冰充冷过程中各参数之间的耦合关系和变化规律 .通过对蓄冰槽的充冷过程的模拟计算 ,可以看出在制冷剂干度超过 0 .6时 ,干度的增加将显著降低管内换热系数 ,从而明显地延缓充冷过程 .因此 ,可采用在制冰的中间过程中调换制冷剂的入口和出口来增加管外结冰的均匀性和提高结冰过程的性能 .此外 ,适当降低带蒸发器蓄冰槽的蓄冰率是合宜的
The process and performance advantages of the ice storage refrigeration system with multi-room evaporator are analyzed, and the mathematic and physical model of ice storage tank filling process is established. For each pipe section of the heat exchanger tube, The difference equations of the thermal process are obtained.The solution to the system of equations is obtained to describe the process of system charging and the coupling relationship between the parameters and the changing rules of the system during ice- It can be seen from the simulation calculation of the cold process that when the dryness of the refrigerant exceeds 0.6, the increase of the dryness will significantly reduce the heat transfer coefficient in the tube, thus obviously delaying the cold charging process. Therefore, the intermediate process In the exchange of refrigerant inlet and outlet to increase the uniformity of the tube outside the icing and improve the performance of the icing process.In addition, appropriate to reduce the ice storage tank with an evaporator ice storage rate is appropriate