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一、运行特性 1.冷冻水出水温度与制冷量的关系当进汽压力、冷冻水量、冷却水量不变,而变更冷冻水出水温度及冷却水进水温度时,制冷能力的变化如图1所示。该图以日本空调用吸收式制冷机的设计标准温度,即以冷冻水出水温度为7℃,冷却水进水温度为32℃时的制冷能力为额定值(100％)。当冷冻水出水温度为5℃时,则制冷能力降低8％。冷却水进水温度为30℃时,制冷能力增大9％。当冷冻水、冷却水温度均有变化时,则制冷能力变化为二者相乘之积。本机当冷冻水温度过低时,有溶液结晶的问题,故冷冻水出水温度的最低值应为:满负荷时4.5～5℃,部分负荷时3～3.5℃。冷冻水出水温度如在上述最低值以上,则能在对应溶液浓度64％以上的结晶线上方稳定运
First, the operating characteristics 1. Freezing water outlet temperature and cooling capacity when the inlet steam pressure, frozen water, cooling water volume unchanged, and change the chilled water outlet water temperature and cooling water inlet temperature, the cooling capacity changes as shown in Figure 1 Show. The figure shows the design standard temperature of an absorption chiller for air conditioning in Japan, that is, the chilled water outlet water temperature is 7°C, and the cooling water inlet water temperature is 32°C when the cooling capacity is rated (100%). When the chilled water outlet water temperature is 5°C, the cooling capacity is reduced by 8%. When the cooling water inlet temperature is 30°C, the cooling capacity increases by 9%. When the temperature of the chilled water and the cooling water are all changed, the cooling capacity changes as the product of the two. When the temperature of chilled water is too low, the machine has the problem of crystallization of the solution. Therefore, the minimum value of chilled water outlet temperature should be 4.5 to 5°C at full load and 3 to 3.5°C at partial load. If the effluent temperature of chilled water is higher than the above minimum value, it can be stably transported above the crystallization line corresponding to a solution concentration of 64% or more.