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按照节流-再混合-流型整定-再分配的原则,对制冷系统中现有的分液器进行了分类;根据两相流的流型理论对孔板型分液器进行改进,分别在校准箱温度为0℃、-4℃、-8℃、-12℃、-16℃、-20℃六种工况下,在冷风机性能试验台同时用空气侧热平衡法和制冷剂侧焓差法测试其对冷风机性能的影响。结果表明:在安装两种分液器时,冷风机冷量都随着校准箱温度的降低而降低;在相同的校准箱温度下,冷风机在安装改进分液器时,其冷量和传热系数都大于安装旧分液器时的冷量,但前者冷量降低的速度大于后者,校准箱温度从0℃到-20℃,其冷量分别从7.17k W和6.02k W降到5.39k W和5.10k W。
In accordance with the throttling - remix - flow setting - redistribution principle of the refrigeration system in the existing classification device; according to the two-phase flow theory of the orifice plate type dispenser improvements, respectively Under the conditions of 0 ℃, -4 ℃, -8 ℃, -12 ℃, -16 ℃ and -20 ℃, the temperature of the calibrator is measured by the air-side heat balance method and the refrigerant side enthalpy difference Method to test its effect on chiller performance. The results show that when both types of liquid separators are installed, the cooling capacity of the chiller decreases with the decrease of the temperature of the chiller; at the same temperature of the chiller, when the chiller is installed with the improved dispenser, The thermal coefficient is greater than that when the old liquid distributor is installed, but the former reduces the cooling capacity more rapidly than the latter. When the temperature of the calibration box is from 0 ℃ to -20 ℃, the cooling capacity drops from 7.17kW and 6.02kW respectively 5.39k W and 5.10k W