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本文通过搭建人工气候室实验台,对某一拖六变制冷剂流量(VRF)空调系统在制冷工况、部分负荷工况下的运行特性进行了实测研究。研究表明,VRF系统在部分负荷工况下具有较高的系统COP,且在负荷率为40%～50%区间内COP最高;在一定负荷率工况下,室外空气温度每升高10℃,系统COP降低0.6～0.8。在该系统定蒸发压力的控制模式下,各室内机的负荷不均匀指数对系统COP的影响很小。
In this paper, by setting up a laboratory bench for artificial climate chamber, the operating characteristics of a certain six-variable VRF air-conditioning system under refrigeration and at partial load are studied. The results show that the VRF system has a higher system COP at part load and the highest COP at a load rate of 40% ~ 50%. When the outdoor air temperature is increased by 10 ℃ under a certain load rate, System COP reduced by 0.6 ~ 0.8. Under the control mode of constant evaporation pressure of this system, the uneven load index of each indoor unit has little influence on the system COP.