无霜冰箱压缩机与风机运行特性研究OA北大核心CSTPCD

In order to improve the energy efficiency of the refrigeration system,a dynamic operation simulation model of the refrigerator was established by optimizing the matched operation of the compressor and fan.The influence of compressor speed and fan air volume on the operating characteristics of the refrigerator,including cooling heat transfer,frosting heat transfer,and power,was analyzed.At the same time,the influence of the matching scheme between the compressor and fan on the system performance was studied.The results indicate that under the condition of meeting cooling demands,increasing the compressor's operating rate helps to reduce energy consumption.In the range of 1200～2100 r/min,increasing the compressor speed can significantly enhance the heat transfer capacity.However,when the speed exceeds 2100 r/min,the compressor's operating rate decreases as the speed increases,and the system power rises accordingly.Increasing the fan airflow can increase the proportion of cooling heat transfer in the total heat transfer.Compared with an airflow of 0.013 kg/s,the proportion of cooling heat transfer increases by 2.73%at an airflow of 0.023 kg/s.However,the increase in fan airflow also leads to a rise in system operating power.Under a specific cooling demand,an optimal matching scheme for compressor speed and fan airflow exists that minimizes the system's power.At a cooling demand of 68 W,the minimum matching scheme for refrigerator power is a fan airflow of 0.017 kg/s and a compressor speed of 2111 r/min,at this time,the system power consumption is 54.28 W.These findings revealed the changes of frosting heat transfer,cooling heat transfer and power,and a low energy consumption matching strategy for fan airflow and compressor speed was proposed,which provides a theoretical basis for optimizing the operational parameters of compressors and fans in refrigeration systems,thereby enhancing energy efficiency.