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多元工质应用于制冷设备其节能效果较好。那么,用多元工质制冷为什么可以节能呢?我们只要具体地分析一下制冷工质在冷凝器和蒸发器中的状态变化条件和过程,就能明白其中的道理。对一定的压缩机,其制冷量是随工质冷凝温度与蒸发温度的不同而变动;其消耗的功率亦随冷凝温度和蒸发温度的不同而改变。为了节能,我们需要的是相对较低的冷凝温度和满足制冷工艺条件下稍高的蒸发温度。制冷系统采用单元工质制冷时,工质在冷凝器的前部是干燥的过热蒸气,只有当工质温度降到冷凝温度时,工质成饱和气体,随之冷凝开始,工质中出现液滴。因为接近管壁的工质先达到冷凝温度,所以液滴首先出现在管壁上,此时,气态和液态共存。随着制冷剂向冷凝器末端运动,液体越来越多,气体反之,直至全部变为液体,冷凝过程结束。在冷凝过程中,冷凝温度
Multi-refrigerant used in refrigeration equipment, its energy-saving effect is better. So why refrigeration with multiple refrigerant can save energy? As long as we analyze the condition and process of refrigerant in the condenser and evaporator, we can understand the truth. For a certain compressor, the refrigeration capacity changes with the condensing temperature of the working fluid and the evaporation temperature; its power consumption also varies with the condensation temperature and evaporation temperature. In order to save energy, we need a relatively low condensation temperature and a slightly higher evaporation temperature to meet the cooling process conditions. Refrigeration system using refrigerant unit, the working fluid in the front of the condenser is dry superheated steam, only when the working fluid temperature dropped to the condensing temperature, the working fluid into a saturated gas, followed by condensation began to appear in the working fluid drop. Because the working fluid close to the wall reaches the condensing temperature first, the droplets first appear on the tube wall, at which point the gas and liquid coexist. As the refrigerant moves toward the end of the condenser, more and more liquid, the gas conversely, until all become liquid, the condensation process is completed. During condensation, condensation temperature